Field
[0001] The present disclosure relates to the technology of multi-connected heat pump air
conditioner system controlling technology, and particularly to a multi-connected heat
pump air conditioner system and a method for controlling the multi-connected heat
pump air conditioner system.
Background
[0002] Along with a constantly improved level of people's life, air conditioner systems
have been installed in living and indoor working environments for more comfort in
the living and working environments as a vital option of the people to accommodate
a higher demand for comfort. Particularly a multi-connected air conditioner is a significant
trend in the development of the central air conditioners due to its free control,
efficient energy conservation, convenience to install and maintain, and other advantages.
[0003] Fig. 1 is a structural diagram of a current multi-connected heat pump air conditioner
system. As shown in Fig. 1, the multi-connected heat pump air conditioner system generally
includes one or more outdoor machines 01, one or more indoor machines 02, a central
control network (CS-NET) 03, a refrigerant pipeline 04, a branch pipe 05 and communication
lines 06. The multiple outdoor machines connect into an outdoor machine system; the
CS-NET controls the outdoor machine system through the communication lines. The outdoor
machines connect with the branch pipe through the refrigerant pipeline, and the branch
pipe connects with indoor machines, herein:
[0004] The outdoor machine generally includes an outdoor heat exchanger, a compressor and
other refrigerating accessories. The outdoor heat exchanger generally uses wind cooling
or water cooling for heat exchange. The indoor machine includes a fan and a heat exchanger,
and generally performs heat exchange by direct evaporation. As compared with multiple
home air conditioners, the outdoor machines of the multi-connected air conditioner
system can be shared to thereby lower effectively a cost of devices and manage centrally
the respective indoor machines and outdoor machines, where a single compressor can
be put into operation separately or multiple compressors can be put into operation
concurrently for higher flexibility of control.
[0005] When the indoor air is processed by the indoor machine of the multi-connected heat
pump air conditioner system, the temperature and humidity of the air needs to be adjusted
and controlled. Herein the humidity control is more difficult. Current multi-connected
heat pump air conditioner system performs dehumidification and cooling to control
the humidity.. However, using such a method, on the one hand, excessively reducing
the supply air temperature may increase energy consumption of the multi-connected
heat pump air conditioner system, and reduction of the temperature of the evaporation,
which will reduce of the energy efficiency ratio of the multi-connected heat pump
air conditioner system, and on the other hand, lowering temperature and dehumidification
during rainy season, will increase the cold feeling of the air. To avoid the uncomfortable
feeling caused by the strong cold feeling, adding heating coil in the indoor machine
is required to heat up the air, which additionally increases the energy consumption
of the multi-connected heat pump air conditioner system.
[0006] To solve the problem that when using multi-connected heat pump air conditioner system
to dehumidify, the system consumes too much energy and the refrigerating efficiency
is low, an improvement method, which is adding a reheat heat exchanger in the indoor
machine, is provided in the prior art, the reheat heat exchanger is a condenser in
fact and the high temperature and high pressure refrigerant flowing from the outdoor
heat exchanger flows through the reheat heat exchanger to release the heat into return
air. The other part of the return air is refrigerated and dehumidified by the evaporator,
and is mixed with the part of return air which is heated before sending into indoor.
Thus cooling is avoided. Avoiding from cooling can also be realized by developing
specialized dehumidification electromagnetic valve or adding multiple electromagnetic
valves. However, such improvement on one hand requires adding additional reheat heat
exchanger in the indoor machine, which adds cost to the system. On the other hand,
using specialized dehumidification electromagnetic valve or multiple electromagnetic
valves increases the difficulty in controlling the multi-connected heat pump air conditioner
system, and the accuracy in control cannot be maintained.
Summary
[0007] The embodiments in this disclosure disclose a multi-connected heat pump air conditioner
system, which lowers system costs and increases control accuracy of the multi-connected
heat pump air conditioner system.
[0008] The embodiments in this disclosure further disclose a method to control multi-connected
heat pump air conditioner system, which lowers system costs and increases control
accuracy of the multi-connected heat pump air conditioner system.To achieve above
purposes, some embodiments in this disclosure provide a multi-connected heat pump
air conditioner system, including:
an outdoor machine and an indoor machine, wherein:
the outdoor machine comprises: a controlling component, a confluence component, a
switching component, and a first heat exchange component;
the indoor machine comprises: an indoor side fan, a second electronic expansion valve,
a second heat exchanger, a third electronic expansion valve and a third heat exchanger;
the controlling component is configured to control a first heat exchanger in the first
exchange component to be condenser, and the second heat exchanger and the third heat
exchanger in the indoor machine both to be evaporators, when the multi-connected heat
pump air conditioner system is in a refrigerating mode; and to control the first heat
exchanger in the first heat exchange component to be evaporator, and the second heat
exchanger and third heat exchanger of the indoor machine both to be condensers, when
the multi-connected heat pump air conditioner system is in a heating mode; and to
control the first heat exchanger in the first heat exchange component and second heat
exchanger of the indoor machine to be both condensers, and the third heat exchanger
of the indoor machine to be evaporator, when the multi-connected heat pump air conditioner
system is in dehumidification without refrigerating mode;
the switching component is configured to control the first terminal and the second
terminal of the switching component to connect, and the third and the fourth terminal
of the switching component to connect, wherein the first terminal of the switching
component receives output from the confluence component, which is output to the first
heat exchange component by the second terminal, the fourth terminal receives the output
from the indoor machine which is output to the confluence component by the third terminal,
when the multi-connected heat pump air conditioner system is in dehumidification without
refrigerating mode; and the switching component is configured to control the first
terminal and the fourth terminal of the switching component to connect, and the second
and the third terminal of the switching component to connect, wherein the first terminal
receives the output from the confluence component which is output to a first terminal
of the indoor machine by the fourth terminal, the second terminal receives the output
from the first heat exchange component which is output to the confluence component
by the third terminal, when the multi-connected heat pump air conditioner system is
in heating mode;
the confluence component is configured to output the refrigerant to the switching
component after liquid-gas separating and compressing the refrigerant output by the
switching component;
the first heat exchange component is configured to drive outdoor air to flow through
the first exchanger in the first heat exchange component, the first terminal of the
first heat exchange component connects with the second terminal of the switching component,
and the other terminal of the first heat exchange component connects with the second
terminal of the indoor machine;
one terminal of the second electronic expansion valve connects to other terminal of
the second stop valve, and other terminal of the second electronic expansion valve
connects with one terminal of the second heat exchanger;
other terminal of the second heat exchanger connects with one terminal of the third
electronic expansion valve;
other terminal of the third electronic expansion valve connects with one terminal
of the third heat exchanger;
other terminal of the third exchanger connects with other terminal of the first stop
valve;
the indoor side fan is configured to drive indoor return air to flow through the second
heat exchanger and the third heat exchanger.
[0009] Preferably, the switching component includes a four way reversing valve and a first
stop valve, wherein:
a first terminal of the four way reversing valve connects with an output terminal
of the confluence component, a second terminal of the four way reversing valve connects
with an input terminal of the first heat exchange component, a third terminal of the
four way reversing valve connects with an input terminal of the confluence component,
and a fourth terminal of the four way reversing valve connects with one terminal of
the first stop valve, other terminal of the first stop valve connects with a first
terminal of the indoor machine.
[0010] Preferably, the confluence component includes: a compressor, a one way valve, and
a gas liquid separator, wherein:
an output terminal of the compressor connects with an input terminal of the one way
valve, an output terminal of the one way valve connects with one terminal of the four
way reversing valve, an input terminal of the gas liquid separator connects with the
third terminal of the four way reversing valve, an output terminal of gas liquid separator
connects with the input terminal of the compressor.
[0011] Preferably, the first heat exchange component includes: a first heat exchanger, an
outdoor side fan, a first electronic expansion valve, and a second stop valve, wherein:
one terminal of the first heat exchanger connects with a second terminal of the four
way reversing valve, and other terminal of the first heat exchanger connects with
one terminal of the first electronic expansion valve;
other terminal of the first electronic expansion valve connects with one terminal
of the second stop valve;
other terminal of the second operation valve connects with a second terminal of the
indoor machine;
the outdoor side fan is configured to drive outdoor air through the first heat exchanger.
[0012] Preferably, the compressor consists of one or more constant speed compressors, or
consists of variable speed compressors, or consisits of constant speed compressors
and variable speed compressors.
[0013] Preferably, the outdoor side fan is an axial flow fan, and the indoor side fan is
a centrifugal fan or a perfusion fan.
[0014] Preferably, the first heat exchanger, the second heat exchanger and the third heat
exchanger are aluminum foil finned copper tube heat exchangers or aluminum finned
micro-tube heat exchangers.
[0015] Preferably, the second heat exchanger is located above the third heat exchanger.
[0016] Preferably, the indoor machine further includes: a first temperature sensor, a second
temperature sensor, and a third temperature sensor, wherein:
the first temperature sensor is located on a refrigerant pipeline, between the second
electronic expansion valve and the second heat exchanger, and which is close to one
terminal of the second heat exchanger;
the second temperature sensor is located on a refrigerant pipeline, between the third
heat exchanger and the first stop valve, and which is close to one terminal of the
third heat exchanger;
the third temperature sensor is located on a refrigerant pipeline, between the third
electronic expansion valve and the third heat exchanger, and which is close to one
terminal of the third heat exchanger.
[0017] Preferably, the refrigerant is output into the one way valve by the outlet of the
compressor, and a high pressure refrigerant gas output by the one way valve enters
into the first terminal of the four way reversing valve;
when the multi-connected heat pump air conditioner system is in refrigerating mode
and dehumidification without refrigerating mode:
the first terminal and the second terminal of the four way reversing valve connects,
and the third terminal and the fourth terminal of the four way reversing valve connects,
the refrigerant flows orderly through the second terminal of the four way reversing
valve, the first heat exchanger, the first electronic expansion valve, the second
stop valve, the second electronic expansion valve, the second heat exchanger, the
third electronic expansion valve, the third heat exchanger, the first stop valve,
the fourth terminal of the four way reversing valve, and enters into an inlet of the
compressor from the third terminal of the four way reversing valve through the gas
liquid separator;
when the multi-connected heat pump air conditioner system is in heating mode:
the first terminal and the fourth terminal of the four way reversing valve connects,
and the second terminnal and the third terminal of the four way reversing valve connects.
The refrigerant flows orderly through the fourth terminal of the four way reversing
valve, the first stop valve, the third heat exchanger, the third electronic expansion
valve, the second heat exchanger, the second electronic expansion valve, the second
stop valve, the first electronic expansion valve, the first heat exchanger, the second
terminal of the four way reversing valve, and enters into an inlet of the compressor
from the third terminal of the four way reversing valve through the gas liquid separator.
[0018] Preferably, in refrigerating mode, the first electronic expansion valve and the third
electronic expansion valve are fully open, and the second electronic expansion valve
throttles; the first heat exchanger works as a condenser, and the second heat exchanger
and the third heat exchanger both work as evaporators, a low temperature air from
the indoor machine cools down the indoor,the opening of the second electronic expansion
valve is controlled by the difference between the temperatures acquired by the second
temperature sensor and the first temperature sensor;
in dehumidification without refrigerating mode, the first electronic expansion valve
and the second electronic expansion valve are fully open, and the third electronic
expansion valve throttles, the first heat exchanger and the second heat exchanger
both work as condensers, and the third heat exchanger work as the evaporator, part
of the return air through the indoor machine is heated up by the second heat exchanger,
and other part of the return air through the indoor component is dehumidified and
refrigerated by the third heat exchanger, the processed hot and cold air is mixed
and sent indoor, the opening of the third electronic expansion valve is controlled
by the difference between the temperatures acquired by the second temperature sensor
and the third temperature sensor;
in heating mode, the third electronic expansion valve is fully open, and the first
electronic expansion valve and the second electronic expansion valve throttle, the
first heat exchanger works as evaporator, and the second heat exchanger and the third
heat exchanger both work as condensers, a high temperature air from the indoor machine
heats up the indoor; the opening of the second electronic expansion valve is controlled
by the difference between the condensation temperature of the high pressure refrigerant
and the temperature acquired by the first temperature sensor.
[0019] Preferably, the indoor machine further includes: a fourth heat exchanger and a fifth
heat exchanger, wherein:
the second heat exchanger and the third heat exchanger form a heat exchanger group,
and the fourth heat exchanger and the fifth heat exchanger form another heat exchanger
group, the two heat exchanger groups are connected by sheet metal component to form
a V shape heat exchanger.
[0020] Preferably, other terminal of the second heat exchanger is connected with one terminal
of the fourth heat exchanger;
other terminal of the fourth heat exchanger is connected with one terminal of the
third electronic expansion valve;
other terminal of the third electronic expansion valve is connected with one terminal
of the third heat exchanger;
other terminal of the third heat exchanger is connected with one terminal of the fifth
heat exchanger;
other terminal of the fifth heat exchanger connects with other terminal of the stop
valve, the second temperature sensor is located on a refrigerant pipeline, between
the fifth heat exchanger and the first stop valve, and which is close to one terminal
of the fifth heat exchanger.
[0021] Perferably, in dehumidification without refrigerating mode, the refrigerant flows
orderly through the second electronic expansion valve, the second heat exchanger,
the fourth heat exchanger, the third electronic expansion valve, the third heat exchanger
and the fifth heat exchanger, the second electronic expansion valve is fully open
and the third electronic expansion valve throttles, the second heat exchanger and
the fourth heat exchanger both work as condensers, and third heat exchanger and the
fifth heat exchanger both work as evaporators; the air from the second heat exchanger
is hot air, from the third heat exchanger is cold air, from the fourth heat exchanger
is hot air, from the fifth heat exchanger is cold air, and such hot and cold air are
mixed and sent out.
[0022] Preferbly, the third electronic expansion valve is consisted of a heat expansion
valve and a electromagnetic valve in parallel connection, the temperature sensor bundle
of the heat expansion valve is located between the first stop valve and the third
heat exchanger, and is close to the refrigerant pipeline to one terminal of the third
heat exchanger, wherein:
when the electromagnetic valve is open, the third electronic expansion valve is fully
open, when the electromagnetic valve is closed and the heat expansion valve regulates,
the third electronic expansion valve throttles, the opening of the heat expansion
valve is controlled according to the temperature acquired by the temperature sensor
bundle.
[0023] A method to control a multi-connected heat pump air conditioner system, incuding:
- A. A confluence component of an outdoor machine outputs a refrigerant to the first
terminal of the switching component, after receiving the refrigerant output by the
third terminal of the switching component and performing gas-liquid separation and
compression to the refrigerant;
Determining the current mode of the multi-connected heat pump air conditioner system;
- B. If the multi-connected heat pump air conditioner system is in refrigeration mode
and dehumidification without refrigeration mode, the refrigerant output by the second
terminal of the switching component connected with the first terminal is driven to
flow orderly through the first heat exchange component, and the second electronic
expansion valve, the second heat exchanger, the third electronic expansion valve and
the third heat exchanger of the indoor machine, and the refrigenant flows back to
the fourth terminal of the switching component through the first stop valve and then
is output out of the third terminal of the switching component;
- C. If the multi-connected heat pump air conditioner system is in heating mode, the
refrigerant output by the fourth terminal of the switching component is driven to
flow orderly through the third heat exchanger, the third electronic expansion valve,
the second heat exchanger and the second electronic expansion valve of the indoor
machine, and flows back to the second terminal of the switching component through
a second stop valve and the first heat exchange component and then is output from
the third terminal of the switching component.
[0024] Wherein the switching component includes a four way reversing valve and a first stop
valve, wherein:
a first terminal of the four way reversing valve connects with an output terminal
of the confluence component, a second terminal of the four way reversing valve connects
with an input terminal of the first hear exchange component, a third terminal of the
four way reversing valve connects with the input terminal of the confluence component,
and a fourth terminal of the four way reversing valve connects with one terminal of
the first stop valve, the other terminal of the first stop valve connects with the
first terminal of the indoor machine;
the confluence component includes: a compressor, a one way valve, and a gas liquid
separator, wherein:
an output terminal of the compressor connects with an input terminal of the one way
valve, an output terminal of the one way valve connects with one terminal of the four
way reversing valve, an input terminal of the gas liquid separator connects with the
third terminal of the four way reversing valve, an output terminal of gas liquid separator
connects with an input terminal of the compressor;
the first heat exchange component includes: a first heat exchanger, an outdoor side
fan, a first electronic expansion valve, and a second stop valve, wherein:
one terminal of the first heat exchange component connects with the second terminal
of the four way reversing valve, and the other terminal connects with one terminal
of the first electronic expansion valve;
other terminal of the first electronic expansion valve connects with one terminal
of the second stop valve;
other terminal of the second operation valve connects with the second terminal of
the indoor machine;
the outdoor side fan is used to drive outdoor air through the first heat exchanger
the indoor machine further includes an indoor side fan used to drive indoor return
air to flow through the second heat exchanger and the third heat exchanger.
[0025] Wherein the Operation B further includes:
the first terminal and the second terminal of the four way reversing valve connects,
and the third and the fourth terminal of the four way reversing valve connects, the
refrigerant flows orderly through the second terminal of the four way reversing valve,
the first heat exchanger, the first electronic expansion valve, the second stop valve,
the second electronic expansion valve, the second heat exchanger, the third electronic
expansion valve, the third heat exchanger, the first stop valve, the fourth terminal
of the four way reversing valve, and enters into an inlet of the compressor from the
third terminal of the four way reversing valve through the gas liquid separator;
wherein, in refrigerating mode, the first electronic expansion valve and the third
electronic expansion valve are fully open, and the second electronic expansion valve
throttles, the first heat exchanger works as a condenser, and the second heat exchanger
and the third heat exchanger both works as evaporators, the lower temperature air
from the indoor machine cools down the indoor, the opening of the second electronic
expansion valve is controlled according to the difference between the temperatures
acquired by the second temperature sensor and the first temperature sensor;
in dehumidification without refrigerating mode, the first electronic expansion valve
and the second electronic expansion valve are fully open, and the third electronic
expansion valve throttles, the first heat exchanger and the second heat exchanger
both work as condensers, and the third heat exchanger works as evaporator, part of
the return air through the indoor machine is heated up by the second heat exchanger,
and the other part is dehumidified and refrigerated by the third heat exchanger, the
processed hot and cold air is mixed and sent indoor; the opening of the third electronic
expansion valve is controlled according to the difference between the temperatures
acquired by the second temperature sensor and the third temperature sensor.
[0026] Wherein the Operation C further includes:
the first terminal and the fourth terminal of the four way reversing valve connects,
and the second and the third terminal of the four way reversing valve connects, the
refrigerant flows orderly through the fourth terminal of the four way reversing valve,
the first stop valve, the third heat exchanger, the third electronic expansion valve,
the second heat exchanger, the second electronic expansion valve, the second stop
valve, the first electronic expansion valve, the first heat exchanger, the second
terminal of the four way reversing valve, and enters into an inlet of the compressor
from the third terminal of the four way reversing valve through the gas liquid separator;
wherein, the third electronic expansion valve is fully open, and the first electronic
expansion valve and the second electronic expansion valve throttle, the first heat
exchanger works as an evaporator, and the second heat exchanger and the third heat
exchanger both work as condensers, the high temperature air from the indoor machine
heats up the indoor; the opening of the second electronic expansion valve is controlled
according to the difference between the condensation temperature of the high pressure
refrigerant and the temperature acquired by the first temperature sensor.
[0027] As shown in above technical schemes, the embodiments in this disclosure discloses
a multi-connected heat pump air conditioner system and a method for controlling the
multi-connected heat pump air conditioner system, wherein a confluence component of
an outdoor machine performs gas-liquid separation and compression to refrigerant output
by the third terminal of a switching component and outputs the refrigerant to the
first terminal of the switching component; determines the working condition of the
multi-connected heat pump air conditioner system; if the multi-connected heat pump
air conditioner system is in refrigeration mode and dehumidification without refrigerating
mode, a refrigerant output by the second terminal, connected with the first terminal
of the switching component, of the switching component is driven to flow orderly through
a first heat exchange component, and, a second electronic expansion valve, a second
heat exchanger, a third electronic expansion valve, and a third heat exchanger, of
the indoor machine, and flows back to the fourth terminal of the switching component
through a first stop valve of the switching component, and then is output from the
third terminal of the switching component; if the multi-connected heat pump air conditioner
system is in heating mode, a refrigerant output by the fourth terminal, connected
with the first terminal of the switching component, of the switching component is
driven to flow orderly through the third heat exchanger, the third electronic expansion
valve, the second heat exchanger and the second electronic expansion valve of the
indoor machine, and flows back to the second terminal of the switching component through
a second stop valve and the first heat exchange component of the outdoor machine,
and then is output from the third terminal. Therefore, the indoor machine and the
outdoor machine both use electronic expansion valve without developing specialized
dehumidification electromagnetic valve or adding electromagnetic valves, thus the
system cost can be reduced, and the control accuracy of the system can be improved
and the difficulty in control can be reduced.
Brief Description of the Drawings
[0028] To better illustrate the technical features in the embodiments in this disclosure
or in prior art, the following briefs describes the drawings required in the embodiments
in this disclosure or in prior art. Obviously, the drawings in the following description
are just for some embodiments in this disclosure. For person having ordinary skills
in the art, they may infer other embodiments and drawings from the embodiments as
shown in the following drawings.
Fig. 1 is a structural diagram of a current multi-connected heat pump air conditioner
system.
Fig. 2 is a structural illustration of the multi-connected heat pump air conditioner
system disclosed in the embodiments in this disclosure.
Fig. 3 is a working illustration of an indoor machine disclosed in the embodiments
in this disclosure realizing dehumidification without refrigeration.
Fig. 4 is another structural illustration of the indoor machine disclosed in the embodiments
in this disclosure.
Fig. 5 is another structural illustration of the indoor machine disclosed in the embodiments
in this disclosure.
Fig. 6 is a flow chart of the method to control multi-connected heat pump air conditioner
system disclosed in the embodiments in this disclosure.
Detailed Description
[0029] The following is a clear and comprehensive description of the technical schemes in
the embodiments in this disclosure, using the drawings for the embodiments. Clearly,
the embodiments described herein are just part of the embodiments of this disclosure,
not all the embodiments. Based on the embodiments of this disclosure, persons with
ordinary skills in this field may acquire other embodiments without inventive effort.
Such embodiments shall be within the scope of the protection of this disclosure.
[0030] Current multi-connected heat pump air conditioner system releases heat into the return
air by adding reheat heat exchanger to make high temperature and high pressure refrigerant
from the outdoor side heat exchanger to flow through the reheat heat exchanger, the
other part of the return air is mixed with the heated air, and sent into indoor after
dehumidified and refrigerated by the evaporator, thus the multi-connected heat pump
air conditioner system realizes dehumidification without refrigeration, however the
cost of the system is added; or, the multi-connected heat pump air conditioner system
realizes dehumidification without refrigerating fuction by developing specialized
dehumidification electromagnetic valve or by adding electromagnetic valves, which
not only adds cost, but also makes the multi-connected heat pump air conditioner system
difficult to control and the accuracy of the multi-connected heat pump air conditioner
system difficult to maintain.
[0031] The embodiments in this disclosure design, from economy and control perspectives,
high efficient new indoor machine used for multi-connected heat pump air conditioner
system, and provide a multi-connected heat pump air conditioner system having the
feature of dehumidification without refrigeration, ensures the multi-connected heat
pump air conditioner system to highly efficient operate while realizing refrigeration,
heating and dehumidification without refrigeration, and satisfied the demand of customers
with high expectations.
[0032] The multi-connected heat pump air conditioner system in the embodiments in this disclosure
can refrigerate in summer, heat up in winter, and dehumidify without refrigeration
in rainy season. From economy perspective, the multi-connected heat pump air conditioner
system in the embodiments in this disclosure does not require additional heat exchanger.
From increasing control accuracy and reducing control difficulty perspectives, the
outdoor machine and the indoor machine in the embodiments in this disclosure both
use electronic expansion valve, and do not require developing specialized dehumidification
electromagnetic valve or adding electromagnetic valves.
[0033] Fig. 2 is a structural illustration of the multi-connected heat pump air conditioner
system provided in the embodiments in this disclosure, including: an outdoor machine
01 and an indoor machine 02, wherein the outdoor machine 01 may be one or more, and
the indoor machine 02 may be one or more.
[0034] Preferably, the indoor machine 02 may be the indoor machine provided in the embodiment
in this disclosure which dehumidified without refrigeration; or the indoor machine
02 may be current indoor machine, i.e. indoor machine having only functions of heating
and refrigeration.
[0035] The outdoor machine 01 includes: a controlling component, a confluence component,
a switching component, and a first heat exchange component.
[0036] The controlling component is configured to control a first heat exchanger 4 in the
first exchange component to be condenser, and the second heat exchanger 13 and the
third heat exchanger 14 in the indoor machine 02 both to be evaporators, when the
multi-connected heat pump air conditioner system is in a refrigerating mode; and to
control the first heat exchanger 4 in the first heat exchange component to be evaporator,
and the second heat exchanger 13 and third heat exchanger 14 of the indoor machine
02 both to be condensers, when the multi-connected heat pump air conditioner system
is in a heating mode; and to control the first heat exchanger 4 in the first heat
exchange component and second heat exchanger 13 of the indoor machine 02 to be both
condensers, and the third heat exchanger 14 of the indoor machine 02 to be evaporator,
when the multi-connected heat pump air conditioner system is in dehumidification without
refrigerating mode;
the switching component is configured to control the first terminal and the second
terminal of the switching component to connect, and the third and the fourth terminal
of the switching component to connect, wherein the first terminal of the switching
component receives output from the confluence component, which is output to the first
heat exchange component by the second terminal, the fourth terminal receives the output
from the indoor machine which is output to the confluence component by the third terminal,
when the multi-connected heat pump air conditioner system is in dehumidification without
refrigerating mode; to control the first terminal and the fourth terminal of the switching
component to connect, and the second and the third terminal of the switching component
to connect, wherein the first terminal receives the output from the confluence component
which is output to the first terminal of the indoor machine by the fourth terminal,
the second terminal receives the output from the first heat exchange component which
is output to the confluence component by the third terminal, when the multi-connected
heat pump air conditioner system is in heating mode;
the confluence component is configured to output the refrigerant to the switching
component after liquid-gas separating and compressing the refrigerant output by the
switching component;
the first heat exchange component is configured to drive outdoor air to flow through
the first exchanger 4 in the first heat exchange component, the first terminal of
the first heat exchange component connects with the second terminal of the switching
component, and the other terminal of the first heat exchange component connects with
the second terminal of the indoor machine.
[0037] Herein, the switching component includes a four way reversing valve 3 and a first
stop valve 8, herein:
[0038] The first terminal of the four way reversing valve 3 connects with the output terminal
of the confluence component, the second terminal connects with the input terminal
of the first hear exchange component, the third terminal connects with the input terminal
of the confluence component, and the fourth terminal connects with one terminal of
the first stop valve 8, the other terminal of the first stop valve 8 connects with
the first terminal of the indoor machine.
[0039] The confluence component includes: a compressor 1, a one way valve 2, and a gas liquid
separator 7, herein:
The output terminal of the compressor 1 connects with the input terminal of the one
way valve 2, the output terminal of the one way valve 2 connects with the first terminal
of the four way reversing valve 3, the input terminal of the gas liquid separator
7 connects with the third terminal of the four way reversing valve 3, the output terminal
of the gas liquid separator 7 connects with the input terminal of the compressor 1.
[0040] In some embodiments, the compressor 1 may consist of one or more constant speed compressors,
or consist of variable speed compressors, or consisit of constant speed compressors
and variable speed compressors.
[0041] The first heat exchange component includes: a first heat exchanger 4, an outdoor
side fan 5, a first electronic expansion valve 6, and a second stop valve 9, herein:
[0042] One terminal of the first heat exchange component 4 connects with the second terminal
of the four way reversing valve 3, and the other terminal of the first heat exchange
component 4 connects with one terminal of the first electronic expansion valve 6.
[0043] The other terminal of the first electronic expansion valve 6 connects with one terminal
of the second stop valve 9.
[0044] The other terminal of the second operation valve 9 connects with the second terminal
of the indoor machine.
[0045] The outdoor side fan 5 is configured to drive the outdoor air to flow through the
first heat exchanger 4.
[0046] In some embodiments, the outdoor side fan 5 is an axial flow fan, and the outdoor
side fan 5 rotates to drive the outdoor air to flow through the first heat exchanger
4.
[0047] Therefore, the outdoor machine 01 includes: a compressor 1, a one way valve 2, a
four way reversing valve 3, a first heat exchanger 4, a outdoor side fan 5, a first
electronic expansion valve 6, a gas liquid separator 7, a first stop valve 8 and a
second stop valve 9, herein:
[0048] The output terminal of the compressor 1 connects with one terminal of the one way
valve 2, and the input terminal connects with the output terminal of the gas liquid
separator 7.
[0049] The other terminal of the one way valve 2 connects with the first terminal of the
four way reversing valve 3.
[0050] The second terminal of the four way reversing valve 3 connects with one terminal
of the first heat exchanger 4, the third terminal of the four way reversing valve
3 connects with the input terminal of the gas liquid separator 7, and the fourth terminal
of the four way reversing valve 3 connects with one terminal of the first stop valve
8.
[0051] The other terminal of the first heat exchanger 4 connects with one terminal of the
first electronic expansion valve 6.
[0052] The other terminal of the first electronic expansion valve 6 connects with one terminal
of the second stop valve 9.
[0053] The other terminal of the first stop valve 8 outputs to the first terminal of the
indoor machine 02, and the other terminal of the second stop valve 9 outputs to the
second terminal of the indoor machine 02.
[0054] The indoor machine 02 includes: an indoor side fan 10, a second electronic expansion
valve 11, a second heat exchanger 13, a third electronic expansion valve 17 and a
third heat exchanger 14, herein:
One terminal of the second electronic expansion valve 11 connects to the other terminal
of the second stop valve 9, and the other terminal connects with one terminal of the
second heat exchanger 13.
[0055] The other terminal of the second heat exchanger 13 connects with one terminal of
the third electronic expansion valve 17.
[0056] The other terminal of the third electronic expansion valve 17 connects with one terminal
of the third heat exchanger 14.
[0057] The other terminal of the third heat exchanger 14 connects with the other terminal
of the first stop valve 8.
[0058] The indoor side fan 10 is configured to drive the indoor return air to flow through
the second heat changer 13 and the third heat changer 14.
[0059] In some embodiments, the indoor side fan 10 is a centrifugal fan or a perfusion fan.
The indoor side fan 0 rotates to drive the indoor return air to flow through the second
heat exchanger 13 and the third heat exchanger 14.
[0060] The first heat exchanger 4, the second heat exchanger 13 and the third heat exchanger
14 are aluminum foil finned copper tube heat exchangers or aluminum finned micro-tube
heat exchangers.
[0061] Preferably, the second heat exchanger 13 is located above the third heat exchanger
14 (in height).
[0062] In practice, a single heat exchanger can be separated into an upper part and a lower
part by connecting and welding curve tubes on the terminal face of the heat exchanger,
for example, by connecting and welding curve tubes on the terminal face of the heat
exchanger, the heat exchanger inside the indoor component can be separated into a
upper part and a lower part to form a second heat exchanger 13 and a third heat exchanger
14. In other words, a second heat exchanger 13 and a third heat exchanger 14 can be
formed by connecting and welding curve tubes on the terminal face of the heat exchanger.
[0063] Preferably, the indoor machine further includes: a first temperature sensor 12, a
second temperature sensor 15, and a third temperature sensor 16, herein:
The first temperature sensor 12 is located on the refrigerant pipeline between the
second electronic expansion valve 11 and the second heat exchanger 13, and the refrigerant
pipeline is close to one terminal of the second heat exchanger 13.
[0064] The second temperature sensor 15 is located on the refrigerant pipeline between the
third heat exchanger 14 and the first stop valve 8, and the refrigerant pipeline is
close to one terminal of the third heat exchanger 14.
[0065] The third temperature sensor 16 is located on the refrigerant pipeline between the
third electronic expansion valve 17 and the third heat exchanger 14, and the refrigerant
pipeline is close to one terminal of the third heat exchanger 14.
[0066] In some embodiments, the temperature sensor 12, the second temperature sensor 15,
and the third temperature sensor 16 are respectively configured to sense the temperatures
of the refrigerant pipelines which they are respectively located on, thus allowing
the electronic expansion valves on respective refrigerant pipelines to adjust the
openings of the electronic expansion valves, to realize refrigeration, heating and
dehumidification without refrigeration according to temperatures sensed by the temperature
sensors.
[0067] Therefore, the indoor machine 02 includes: an indoor side fan 10, a second electronic
expansion valve 11, a first temperature sensor 12, a second heat exchanger 13, a third
heat exchanger 14, a second temperature sensor 15, a third temperature sensor 16 and
a third electronic expansion valve 17, herein:
One terminal of the second electronic expansion valve 11 connects with one terminal
of the second heat exchanger 13, the first temperature sensor 12 is located on the
refrigerant pipeline between the second electronic expansion valve 11 and the second
heat exchanger 13, and the refrigerant pipeline is close to one terminal of the second
heat exchanger 13, the other terminal of the second electronic expansion valve 11
connects with the other terminal of the second stop valve 9.
[0068] The other terminal of the second heat exchanger 13 connects with one terminal of
the third electronic expansion valve 17.
[0069] The other terminal of the third electronic expansion valve 17 connects with one terminal
of the third heat exchanger 14, the third temperature sensor 16 is located on the
refrigerant pipeline between the third electronic expansion valve 17 and the third
heat exchanger 14, and the refrigerant pipeline is close to one terminal of the third
heat exchanger 14.
[0070] The other terminal of the third heat exchanger 14 connects with the other terminal
of the first stop valve 8, the second temperature sensor 15 is located on the refrigerant
pipeline between the third heat exchanger 14 and the first stop valve 8, and the refrigerant
pipeline is close to one terminal of the third heat exchanger 14.
[0071] The indoor side fan 10 can be configured to drive indoor return air to flow through
the second heat exchanger 13 and the third heat exchanger 14.
[0072] The following is a detailed description of the work process of the multi-connected
heat pump air conditioner system in the embodiment of this disclosure.
[0073] The refrigerant is output into the one way valve 2 by the outlet (output terminal)
of the compressor 1, and the high pressure refrigerant output by the one way valve
2 enters into the first terminal of the four way reversing valve 3.
[0074] When the multi-connected heat pump air conditioner system is in refrigerating mode
and dehumidification without refrigerating mode:
The first terminal of the four way reversing valve 3 connects with the second terminal
of the four way reversing valve 3, and the third of the four way reversing valve 3
connects with the fourth terminal of the four way reversing valve 3. The refrigerant
flows orderly through the second terminal of the four way reversing valve 3, the first
heat exchanger 4, the first electronic expansion valve 6, the second stop valve 9,
the second electronic expansion valve 11, the second heat exchanger 13, the third
electronic expansion valve 17, the third heat exchanger 14, the first stop valve 8,
the fourth terminal of the four way reversing valve 3, and enters into the inlet (input
terminal) of the compressor 1 from the third terminal of the four way reversing valve
3 through the gas liquid separator 7.
[0075] When the multi-connected heat pump air conditioner system is in heating mode:
The first terminal and the fourth terminal of the four way reversing valve 3 connects,
and the second and the third terminal connects. The refrigerant flows orderly through
the fourth terminal of the four way reversing valve 3, the first stop valve 8, the
third heat exchanger 14, the third electronic expansion valve 17, the second heat
exchanger 13, the second electronic expansion valve 11, the second stop valve 9, the
first electronic expansion valve 6, the first heat exchanger 4, the second terminal
of the four way reversing valve 3, and enters into the inlet of the compressor 1 from
the third terminal of the four way reversing valve 3 through the gas liquid separator
7
[0076] To realize refrigeration, heating and dehumidification without refrigeration, the
methods to control each electronic expansion valve in different modes and the work
processes of each heat exchanger in different modes are as following:
In refrigerating mode, the first electronic expansion valve 6 and the third electronic
expansion valve 17 are fully open, and the second electronic expansion valve 11 throttles
to adjust the flow of the refrigerant flowing through the second electronic expansion
valve 11. In the refrigerating mode, the first heat exchanger 4 is condenser, and
the second heat exchanger 13 and the third heat exchanger 14 are both evaporators,
the lower temperature air from the indoor machine 02 cools down the indoor. The opening
of the second electronic expansion valve 11 is controlled according to the difference
between the temperatures acquired by the second temperature sensor 15 and the first
temperature sensor 12, i.e. the evaporation overheating degree. Herein:
Where,
SH is evaporation overheating degree. The opening of the valve is controlled by calculating
the evaporation overheating degree:
T15 is a temperature acquired by the second temperature sensor 15.
T12 is a temperature acquired by the first temperature sensor 12.
[0077] In heating mode, the third electronic expansion valve 17 is fully open, and the first
electronic expansion valve 6 and the second electronic expansion valve 11 throttle
to adjust flows of the refrigerants flowing through the first electronic expansion
valve 6 and the second electronic expansion valve 11 respectively. In the heating
mode, the first heat exchanger 4 is evaporator, and the second heat exchanger 13 and
the third heat exchanger 14 are both condensers. The higher temperature air from the
indoor machine 02 heats up the indoor. The opening of the second electronic expansion
valve 11 is controlled according to the difference between the condensation temperature
of the high pressure refrigerant and the temperature acquired by the first temperature
sensor 12, i.e. the condensation overcooling degree. Herein:
Where,
SC is condensation overcooling degree.
TC is the condensation temperature of the refrigerant.
T12 is the temperature acquired by the first temperature sensor 12.
[0078] In dehumidification without refrigerating mode, the first electronic expansion valve
6 and the second electronic expansion valve 11 are fully open, and the third electronic
expansion valve 17 throttles. The first heat exchanger 4 and the second heat exchanger
13 are both condensers, and the third heat exchanger 14 is evaporator. Part of the
return air which flows through the indoor machine 02 is heated up by the second heat
exchanger 13, and the other part is dehumidified and refrigerated by the third heat
exchanger 14. The processed hot and cold air is mixed and sent indoor to realize the
dehumidification without refrigerating. The opening of the third electronic expansion
valve 17 is controlled according to the difference between the temperatures acquired
by the second temperature sensor 15 and the third temperature sensor 16, i.e. the
evaporation overheating degree. Herein:
Where,
SH' is the evaporation overheating degree.
T15 is the temperatures acquired by the second temperature sensor 15.
T16 is the temperatures acquired by the first temperature sensor 16.
[0079] Fig. 3 is an illustration of the way the indoor machine of the embodiments in this
disclosure realizing dehumidification without refrigeration. As shown in Fig. 3, the
second heat exchanger 13 is a condenser, and third heat exchanger 14 is an evaporator.
The indoor side fan 10 is started up to drive the indoor return air to flow through
the second heat exchanger 13 and the third heat exchanger 14, to enable the return
air flowing through the indoor machine 02 to be divided into two parts. One part of
the return air is heated up by the second heat exchanger 13 to become warm air, and
the other part is refrigerated and dehumidified by the third heat exchanger 14. Then,
the warm air heated up by the second heat exchanger 13 and the cold air refrigerated
and dehumidified by the third heat exchanger 14 is mixed and sent indoor, therefore
realizing dehumidification the indoor without refrigeration.
[0080] Fig. 4 is another structural schematic of indoor machine of the embodiments in this
disclosure. As shown in Fig. 4, this embodiment is a preferred embodiment, which includes
two groups of heat exchangers. The second heat exchanger 13 and the third heat exchanger
14 form one heat exchanger group, and the fourth heat exchanger 13' and the fifth
heat exchanger 14' form another heat exchanger group. The two heat exchanger groups
are connected by sheet metal component 20 to form a V shape heat exchanger. Thus increasing
heat exchange surface within the limited space inside the indoor machine, enhancing
the refrigeration volume, heating volume and dehumidification volume of the multi-connected
heat pump air conditioner system.
[0081] Herein, the other terminal of the second heat exchanger 13 is connected with one
terminal of the fourth heat exchanger 13'.
[0082] The other terminal of the fourth heat exchanger 13' is connected with one terminal
of the third electronic expansion valve 17.
[0083] The other terminal of the third electronic expansion valve 17 is connected with one
terminal of the third heat exchanger 14. The third temperature sensor 16 is located
on the refrigerant pipeline between the third electronic expansion valve 17 and the
third heat exchanger 14, and the refrigerant pipeline is close to one terminal of
the third heat exchanger 14.
[0084] The other terminal of the third heat exchanger 14 is connected with one terminal
of the fifth heat exchanger 14'.
[0085] The other terminal of the fifth heat exchanger 14' connects with the other terminal
of the first stop valve 8. The second temperature sensor 15 is located on the refrigerant
pipeline between the fifth heat exchanger 14' and the first stop valve 8, and the
refrigerant pipeline is close to one terminal of the fifth heat exchanger 14'.
[0086] In the embodiments, the second heat exchanger 13 and the fourth heat exchanger 13'
have the same function, and the third heat exchanger 14 and the fifth heat exchanger
14' have the same function, by connecting the refrigerant pipeline. In other words,
the second heat exchanger 13 and the fourth heat exchanger 13' are both condensers
or are both evaporators, and the third heat exchanger 14 and the fifth heat exchanger
14' are both condensers or are both evaporators.
[0087] For example, in the dehumidification without refrigerating mode, as shown in Fig.
4, the refrigerant flows orderly through the second electronic expansion valve 11,
the second heat exchanger 13, the fourth heat exchanger13', the third electronic expansion
valve 17, the third heat exchanger 14 and the fifth heat exchanger 14'. In such mode,
the second electronic expansion valve 11 is fully open and the third electronic expansion
valve 17 throttles. The second heat exchanger 13 and the fourth heat exchanger 13'
are both condensers, and third heat exchanger 14 and the fifth heat exchanger 14'
are both evaporators. The return air after processed is hot air, cold air, hot air,
cold air respectively from top to bottom. That is, the air flowing from the second
heat exchanger 13 is hot, flowing from the third heat exchanger 14 is cold, flowing
from the fourth heat exchanger 13' is hot, flowing from the fifth heat exchanger 14'
is cold, and the hot and cold air are mixed and sent out. Therefore, the air of different
temperatures can be mixed, and thus the comfort of the air sent out from the multi-connected
heat pump air conditioner system and the thermal performance of the multi-connected
heat pump air conditioner system are improved.
[0088] In this embodiment, as shown in Figs. 3 and 4, the rules of controlling each electronic
expansion valve are same as the rules of controlling each electronic expansion valve
in Fig. 2. In Fig. 4, the second temperature sensor 15 is located on the refrigerant
pipeline between the fifth heat exchanger 14' and the first stop valve 8, and the
refrigerant pipeline is close to one terminal of the fifth heat exchanger 14'. The
locations of other electronic expansion valves remain the same.
[0089] Fig. 5 is another structural illustration of indoor machine of the embodiments in
this disclosure. As shown in Fig. 5, differing from Fig. 3, the third electronic expansion
valve 17 is replaced by a heat expansion valve 18 and an electromagnetic valve 19
which are in parallel connection, i.e. one terminal of the heat expansion valve 18
connects with one terminal of the electromagnetic valve 19, and also connects with
the other terminal of the second heat exchanger 13; the other terminal of the heat
expansion valve 18 connects with the other terminal of the electromagnetic valve 19,
and also connects with the other terminal of the third heat exchanger 14. The temperature
sensor bundle 15' of the heat expansion valve is located on the refrigerant pipeline
between the first stop valve 8 and the third heat exchanger 14, and the refrigerant
pipeline is close to one terminal of the third heat exchanger 14.
[0090] In some embodiments, in different modes the function of each heat exchanger is the
same as the corresponding heat exchanger in Fig. 2. In two embodiments (in Figs. 2
and 5), the rules of controlling the first electronic expansion valve 6 is same with
the corresponding rules of controlling the function of the second electronic expansion
valve 11. This embodiment is differs from the embodiment of Fig.2 in that, the third
electronic expansion valve 17 is replaced by a heat expansion valve 18 and an electromagnetic
valve 19 which are in parallel connection, the heat expansion valve 18 and the electromagnetic
valve 19 which are in parallel connection work in the following manner: the electromagnetic
valve 19 is open, corresponds to the third electronic expansion valve 17 is fully
open; the electromagnetic valve 19 is closed and the heat expansion valve 18 throttles,
corresponds to the third electronic expansion valve 17 throttles; the opening of the
heat expansion valve 18 is controlled according to the temperature acquired by the
temperature sensor bundle 15'.
[0091] Above all, the multi-connected heat pump air conditioner system in the embodiments
in this disclosure can share an outdoor machine, and doesn't require additional heat
exchanger in the indoor machines. By connecting and welding the curved tubes on the
terminal face of the heat exchanger in the indoor machines, one heat exchanger can
be separated into an upper part and a lower part, thus enhancing economy and lowers
costs, also achieving collective control of each of the indoor machine, and thus not
only achieving only one indoor machine's s start-up, but also achieving several indoor
components' start-up at the same time, which improve the flexibility in control. The
indoor machines can refrigerate in summer, heat up in winter, and dehumidify without
refrigeration in rainy season, thus making the air sent out by the indoor components
more comfortable. Additionally, the outdoor machine and the indoor machine in the
embodiments in this disclosure both use electronic expansion valve, and do not require
developing specialized dehumidification electromagnetic valve or adding electromagnetic
valves; therefore lowing control difficulty and reducing control accuracy.
[0092] Fig. 6 is a flow chart of the method to control multi-connected heat pump air conditioner
system disclosed in the embodiments in this disclosure. As shown in Fig. 6, the method
includes:
S601. The confluence component of the outdoor machine outputs a refrigerant to the
first terminal of the switching component, after receiving the refrigerant output
by the third terminal of the switching component and performing gas-liquid separation
and compression to the refrigerant.
[0093] Herein, the switching component includes a four way reversing valve and a first stop
valve, herein:
The first terminal of the four way reversing valve connects with an output terminal
of the confluence component, the second terminal of the four way reversing valve connects
with an input terminal of the first hear exchange component, the third terminal of
the four way reversing valve connects with the input terminal of the confluence component,
and the fourth terminal of the four way reversing valve connects with one terminal
of the first stop valve, the other terminal of the first stop valve connects with
the first terminal of the indoor machine.
[0094] The confluence component includes: a compressor, a one way valve, and a gas liquid
separator, herein:
The output terminal of the compressor connects with the input terminal of the one
way valve. The output terminal of the one way valve connects with one terminal of
the four way reversing valve. The input terminal of the gas liquid separator connects
with the third terminal of the four way reversing valve. The output terminal of gas
liquid separator connects with the input terminal of the compressor.S602. Determining
the current mode of the multi-connected heat pump air conditioner system, if the mode
is refrigeration mode or dehumidification without refrigeration mode, performing S603;
if the mode is heating mode, performing S604.
[0095] S603. The refrigerant output by the second terminal of the switching component connected
with the first terminal of the switching component is driven to flow orderly through
the first heat exchange component, and the second electronic expansion valve, the
second heat exchanger, the third electronic expansion valve and the third heat exchanger
of the indoor machine, and flow back to the fourth terminal of the switching component
through the first stop valve and then is output from the third terminal of the switching
component.
[0096] Herein, the first heat exchange component includes: a first heat exchanger, an outdoor
side fan, a first electronic expansion valve, and a second stop valve, herein:
One terminal of the first heat exchanger connects with the second terminal of the
four way reversing valve, and the other terminal of the first heat exchanger connects
with one terminal of the first electronic expansion valve.
[0097] The other terminal of the first electronic expansion valve connects with one terminal
of the second stop valve.
[0098] The other terminal of the second operation valve connects with the second terminal
of the indoor machine.
[0099] The outdoor side fan is configured to drive the outdoor air to flow through the first
heat exchanger.
[0100] The indoor machine further includes an indoor side fan used to drive indoor return
air to flow through the second heat exchanger and the third heat exchanger.
[0101] Herein the S603 includes:
The first terminal and the second terminal of the four way reversing valve connects,
and the third and the fourth terminal of the four way reversing valve connects. The
refrigerant flows orderly through the second terminal of the four way reversing valve,
the first heat exchanger, the first electronic expansion valve, the second stop valve,
the second electronic expansion valve, the second heat exchanger, the third electronic
expansion valve, the third heat exchanger, the first stop valve, the fourth terminal
of the four way reversing valve, and enters into the inlet of the compressor from
the third terminal of the four way reversing valve through the gas liquid separator.
[0102] Herein, in refrigerating mode, the first electronic expansion valve and the third
electronic expansion valve are fully open, and the second electronic expansion valve
throttles. The first heat exchanger is a condenser, and the second heat exchanger
and the third heat exchanger are both evaporators. The lower temperature air from
the indoor machine cools down the indoor. The opening of the second electronic expansion
valve is controlled according to the difference between the temperatures acquired
by the second temperature sensor and the first temperature sensor.
[0103] In dehumidification without refrigerating mode, the first electronic expansion valve
and the second electronic expansion valve are fully open, and the third electronic
expansion valve throttles. The first heat exchanger and the second heat exchanger
are both condensers, and the third heat exchanger is an evaporator. Part of the return
air through the indoor machine is heated up by the second heat exchanger, and the
other part is dehumidified and refrigerated by the third heat exchanger. The processed
hot and cold air is mixed and sent indoor. The opening of the third electronic expansion
valve is controlled according to the difference between the temperatures acquired
by the second temperature sensor and the third temperature sensor.
[0104] S604. Refrigerant output by the fourth terminal of the switching component connected
with the first terminal is driven to flow orderly through the third heat exchanger,
the third electronic expansion valve, the second heat exchanger and the second electronic
expansion valve, flows back to the second terminal of the switching component through
a second stop valve and the first heat exchange component and then is output from
the third terminal of the switching component.
[0105] Herein, S604 includes:
The first terminal and the fourth terminal of the four way reversing valve connects,
and the second and the third terminals connects. The refrigerant flows orderly through
the fourth terminal of the four way reversing valve, the first stop valve, the third
heat exchanger, the third electronic expansion valve, the second heat exchanger, the
second electronic expansion valve, the second stop valve, the first electronic expansion
valve, the first heat exchanger, the second terminal of the four way reversing valve,
and enters into the inlet of the compressor from the third terminal of the four way
reversing valve, through the gas liquid separator.
[0106] Herein, the third electronic expansion valve is fully open, and the first electronic
expansion valve and the second electronic expansion valve throttles. The first heat
exchanger is an evaporator, and the second heat exchanger and the third heat exchanger
are both condensers. The higher temperature air from the indoor machine heats up the
indoor. The opening of the second electronic expansion valve is controlled by the
difference between the condensation temperature of the high pressure refrigerant and
the temperature acquired by the first temperature sensor.
[0107] Obviously, those skilled in this art can make any changes and modifications to the
embodiments herein of this disclosure without altering the spirit or falling out of
the scope. If so, such changes or modifications to this disclosure shall be within
the scope of the claims herein or be equivalent thereto, and this disclosure shall
include such changes or modifications.
1. A multi-connected heat pump air conditioner system, wherein the system comprises:
an outdoor machine and an indoor machine, wherein:
the outdoor machine comprises: a controlling component, a confluence component, a
switching component, and a first heat exchange component;
the indoor machine comprises: an indoor side fan, a second electronic expansion valve,
a second heat exchanger, a third electronic expansion valve and a third heat exchanger;
the controlling component is configured to control a first heat exchanger in the first
exchange component to be condenser, and the second heat exchanger and the third heat
exchanger in the indoor machine both to be evaporators, when the multi-connected heat
pump air conditioner system is in a refrigerating mode; and to control the first heat
exchanger in the first heat exchange component to be evaporator, and the second heat
exchanger and third heat exchanger of the indoor machine both to be condensers, when
the multi-connected heat pump air conditioner system is in a heating mode; and to
control the first heat exchanger in the first heat exchange component and second heat
exchanger of the indoor machine to be both condensers, and the third heat exchanger
of the indoor machine to be evaporator, when the multi-connected heat pump air conditioner
system is in dehumidification without refrigerating mode;
the switching component is configured to control the first terminal and the second
terminal of the switching component to connect, and the third and the fourth terminal
of the switching component to connect, wherein the first terminal of the switching
component receives output from the confluence component, which is output to the first
heat exchange component by the second terminal, the fourth terminal receives the output
from the indoor machine which is output to the confluence component by the third terminal,
when the multi-connected heat pump air conditioner system is in dehumidification without
refrigerating mode; and the switching component is configured to control the first
terminal and the fourth terminal of the switching component to connect, and the second
and the third terminal of the switching component to connect, wherein the first terminal
receives the output from the confluence component which is output to a first terminal
of the indoor machine by the fourth terminal, the second terminal receives the output
from the first heat exchange component which is output to the confluence component
by the third terminal, when the multi-connected heat pump air conditioner system is
in heating mode;
the confluence component is configured to output the refrigerant to the switching
component after liquid-gas separating and compressing the refrigerant output by the
switching component;
the first heat exchange component is configured to drive outdoor air to flow through
the first exchanger in the first heat exchange component, the first terminal of the
first heat exchange component connects with the second terminal of the switching component,
and the other terminal of the first heat exchange component connects with the second
terminal of the indoor machine;
one terminal of the second electronic expansion valve connects to other terminal of
the second stop valve, and other terminal of the second electronic expansion valve
connects with one terminal of the second heat exchanger;
other terminal of the second heat exchanger connects with one terminal of the third
electronic expansion valve;
other terminal of the third electronic expansion valve connects with one terminal
of the third heat exchanger;
other terminal of the third exchanger connects with other terminal of the first stop
valve;
the indoor side fan is configured to drive indoor return air to flow through the second
heat exchanger and the third heat exchanger.
2. The system of claim 1, wherein the switching component comprises a four way reversing
valve and a first stop valve, wherein:
a first terminal of the four way reversing valve connects with an output terminal
of the confluence component, a second terminal of the four way reversing valve connects
with an input terminal of the first heat exchange component, a third terminal of the
four way reversing valve connects with an input terminal of the confluence component,
and a fourth terminal of the four way reversing valve connects with one terminal of
the first stop valve, other terminal of the first stop valve connects with a first
terminal of the indoor machine.
3. The system of claim 2, wherein the confluence component comprises: a compressor, a
one way valve, and a gas liquid separator, wherein:
an output terminal of the compressor connects with an input terminal of the one way
valve, an output terminal of the one way valve connects with one terminal of the four
way reversing valve, an input terminal of the gas liquid separator connects with the
third terminal of the four way reversing valve, an output terminal of gas liquid separator
connects with the input terminal of the compressor.
4. The system of claim 3, wherein the first heat exchange component comprises: a first
heat exchanger, an outdoor side fan, a first electronic expansion valve, and a second
stop valve, wherein:
one terminal of the first heat exchanger connects with a second terminal of the four
way reversing valve, and other terminal of the first heat exchanger connects with
one terminal of the first electronic expansion valve;
other terminal of the first electronic expansion valve connects with one terminal
of the second stop valve;
other terminal of the second operation valve connects with a second terminal of the
indoor machine;
the outdoor side fan is configured to drive outdoor air through the first heat exchanger.
5. The system of claim 4, wherein the compressor consists of one or more constant speed
compressors, or consists of variable speed compressors, or consisits of constant speed
compressors and variable speed compressors.
6. The system of claim 4, wherein:
the outdoor side fan is an axial flow fan, and the indoor side fan is a centrifugal
fan or a perfusion fan.
7. The system of claim 4, wherein the first heat exchanger, the second heat exchanger
and the third heat exchanger are aluminum foil finned copper tube heat exchangers
or aluminum finned micro-tube heat exchangers.
8. The system of claim 4, wherein the second heat exchanger is located above the third
heat exchanger.
9. The system of any one of claims 1 to 8, wherein the indoor machine further comprises:
a first temperature sensor, a second temperature sensor, and a third temperature sensor,
wherein:
the first temperature sensor is located on a refrigerant pipeline, between the second
electronic expansion valve and the second heat exchanger, and which is close to one
terminal of the second heat exchanger;
the second temperature sensor is located on a refrigerant pipeline, between the third
heat exchanger and the first stop valve, and which is close to one terminal of the
third heat exchanger;
the third temperature sensor is located on a refrigerant pipeline, between the third
electronic expansion valve and the third heat exchanger, and which is close to one
terminal of the third heat exchanger.
10. The system of claim 9, wherein the refrigerant is output into the one way valve by
the outlet of the compressor, and a high pressure refrigerant gas output by the one
way valve enters into the first terminal of the four way reversing valve;
when the multi-connected heat pump air conditioner system is in refrigerating mode
and dehumidification without refrigerating mode:
the first terminal and the second terminal of the four way reversing valve connects,
and the third terminal and the fourth terminal of the four way reversing valve connects,
the refrigerant flows orderly through the second terminal of the four way reversing
valve, the first heat exchanger, the first electronic expansion valve, the second
stop valve, the second electronic expansion valve, the second heat exchanger, the
third electronic expansion valve, the third heat exchanger, the first stop valve,
the fourth terminal of the four way reversing valve, and enters into an inlet of the
compressor from the third terminal of the four way reversing valve through the gas
liquid separator;
when the multi-connected heat pump air conditioner system is in heating mode:
the first terminal and the fourth terminal of the four way reversing valve connects,
and the second terminnal and the third terminal of the four way reversing valve connects.
The refrigerant flows orderly through the fourth terminal of the four way reversing
valve, the first stop valve, the third heat exchanger, the third electronic expansion
valve, the second heat exchanger, the second electronic expansion valve, the second
stop valve, the first electronic expansion valve, the first heat exchanger, the second
terminal of the four way reversing valve, and enters into an inlet of the compressor
from the third terminal of the four way reversing valve through the gas liquid separator.
11. The system of claim 10, wherein:
in refrigerating mode, the first electronic expansion valve and the third electronic
expansion valve are fully open, and the second electronic expansion valve throttles;
the first heat exchanger works as a condenser, and the second heat exchanger and the
third heat exchanger both work as evaporators, a low temperature air from the indoor
machine cools down the indoor,the opening of the second electronic expansion valve
is controlled by the difference between the temperatures acquired by the second temperature
sensor and the first temperature sensor;
in dehumidification without refrigerating mode, the first electronic expansion valve
and the second electronic expansion valve are fully open, and the third electronic
expansion valve throttles, the first heat exchanger and the second heat exchanger
both work as condensers, and the third heat exchanger work as the evaporator, part
of the return air through the indoor machine is heated up by the second heat exchanger,
and other part of the return air through the indoor component is dehumidified and
refrigerated by the third heat exchanger, the processed hot and cold air is mixed
and sent indoor, the opening of the third electronic expansion valve is controlled
by the difference between the temperatures acquired by the second temperature sensor
and the third temperature sensor;
in heating mode, the third electronic expansion valve is fully open, and the first
electronic expansion valve and the second electronic expansion valve throttle, the
first heat exchanger works as evaporator, and the second heat exchanger and the third
heat exchanger both work as condensers, a high temperature air from the indoor machine
heats up the indoor; the opening of the second electronic expansion valve is controlled
by the difference between the condensation temperature of the high pressure refrigerant
and the temperature acquired by the first temperature sensor.
12. The system of claim 9, wherein the indoor machine further comprises: a fourth heat
exchanger and a fifth heat exchanger, wherein:
the second heat exchanger and the third heat exchanger form a heat exchanger group,
and the fourth heat exchanger and the fifth heat exchanger form another heat exchanger
group, the two heat exchanger groups are connected by sheet metal component to form
a V shape heat exchanger.
13. The system of claim 12, wherein other terminal of the second heat exchanger is connected
with one terminal of the fourth heat exchanger;
other terminal of the fourth heat exchanger is connected with one terminal of the
third electronic expansion valve;
other terminal of the third electronic expansion valve is connected with one terminal
of the third heat exchanger;
other terminal of the third heat exchanger is connected with one terminal of the fifth
heat exchanger;
other terminal of the fifth heat exchanger connects with other terminal of the stop
valve, the second temperature sensor is located on a refrigerant pipeline, between
the fifth heat exchanger and the first stop valve, and which is close to one terminal
of the fifth heat exchanger.
14. The system of claim 13, wherein in dehumidification without refrigerating mode, the
refrigerant flows orderly through the second electronic expansion valve, the second
heat exchanger, the fourth heat exchanger, the third electronic expansion valve, the
third heat exchanger and the fifth heat exchanger, the second electronic expansion
valve is fully open and the third electronic expansion valve throttles, the second
heat exchanger and the fourth heat exchanger both work as condensers, and third heat
exchanger and the fifth heat exchanger both work as evaporators; the air from the
second heat exchanger is hot air, from the third heat exchanger is cold air, from
the fourth heat exchanger is hot air, from the fifth heat exchanger is cold air, and
such hot and cold air are mixed and sent out.
15. The system of claim 9, wherein the third electronic expansion valve is consisted of
a heat expansion valve and a electromagnetic valve in parallel connection, the temperature
sensor bundle of the heat expansion valve is located between the first stop valve
and the third heat exchanger, and is close to the refrigerant pipeline to one terminal
of the third heat exchanger, wherein:
when the electromagnetic valve is open, the third electronic expansion valve is fully
open, when the electromagnetic valve is closed and the heat expansion valve regulates,
the third electronic expansion valve throttles, the opening of the heat expansion
valve is controlled according to the temperature acquired by the temperature sensor
bundle.
16. A method to control a multi-connected heat pump air conditioner system, comprising:
A. A confluence component of an outdoor machine outputs a refrigerant to a first terminal
of the switching component, after receiving the refrigerant output by the third terminal
of the switching component and performing a gas-liquid separation and compression
to the refrigerant;
Determining the current mode of the multi-connected heat pump air conditioner system;
B. If the multi-connected heat pump air conditioner system is in refrigeration mode
and dehumidification without refrigeration mode, the refrigerant output by the second
terminal of the switching component connected with the first terminal is driven to
flow orderly through the first heat exchange component, and the second electronic
expansion valve, the second heat exchanger, the third electronic expansion valve and
the third heat exchanger of the indoor machine, and the refrigenant flow back to the
fourth terminal of the switching component through the first stop valve and then is
output from the third terminal of the switching component;
C. If the multi-connected heat pump air conditioner system is in heating mode, the
refrigerant output by the fourth terminal of the switching component is driven to
flow orderly through the third heat exchanger, the third electronic expansion valve,
the second heat exchanger and the second electronic expansion valve of the indoor
machine, and flows back to the second terminal of the switching component through
a second stop valve and the first heat exchange component and then is output from
the third terminal of the switching component.
17. The method of claim 16, wherein the switching component comprises a four way reversing
valve and a first stop valve, wherein:
a first terminal of the four way reversing valve connects with an output terminal
of the confluence component, a second terminal of the four way reversing valve connects
with an input terminal of the first hear exchange component, a third terminal of the
four way reversing valve connects with the input terminal of the confluence component,
and a fourth terminal of the four way reversing valve connects with one terminal of
the first stop valve, the other terminal of the first stop valve connects with the
first terminal of the indoor machine;
the confluence component comprises: a compressor, a one way valve, and a gas liquid
separator, wherein:
an output terminal of the compressor connects with an input terminal of the one way
valve, an output terminal of the one way valve connects with one terminal of the four
way reversing valve, an input terminal of the gas liquid separator connects with the
third terminal of the four way reversing valve, an output terminal of gas liquid separator
connects with an input terminal of the compressor;
the first heat exchange component comprises: a first heat exchanger, an outdoor side
fan, a first electronic expansion valve, and a second stop valve, wherein:
one terminal of the first heat exchange component connects with the second terminal
of the four way reversing valve, and the other terminal connects with one terminal
of the first electronic expansion valve;
other terminal of the first electronic expansion valve connects with one terminal
of the second stop valve;
other terminal of the second operation valve connects with the second terminal of
the indoor machine;
the outdoor side fan is used to drive outdoor air through the first heat exchanger
the indoor machine further comprises an indoor side fan used to drive indoor return
air through the second heat exchanger and the third heat exchanger.
18. The method of claim 17, wherein the Operation B further comprises:
the first terminal and the second terminal of the four way reversing valve connects,
and the third and the fourth terminal of the four way reversing valve connects, the
refrigerant flows orderly through the second terminal of the four way reversing valve,
the first heat exchanger, the first electronic expansion valve, the second stop valve,
the second electronic expansion valve, the second heat exchanger, the third electronic
expansion valve, the third heat exchanger, the first stop valve, the fourth terminal
of the four way reversing valve, and enters into an inlet of the compressor from the
third terminal of the four way reversing valve through the gas liquid separator;
wherein, in refrigerating mode, the first electronic expansion valve and the third
electronic expansion valve are fully open, and the second electronic expansion valve
throttles, the first heat exchanger works as a condenser, and the second heat exchanger
and the third heat exchanger both works as evaporators, the lower temperature air
from the indoor machine cools down the indoor, the opening of the second electronic
expansion valve is controlled according to the difference between the temperatures
acquired by the second temperature sensor and the first temperature sensor;
in dehumidification without refrigerating mode, the first electronic expansion valve
and the second electronic expansion valve are fully open, and the third electronic
expansion valve throttles, the first heat exchanger and the second heat exchanger
both work as condensers, and the third heat exchanger works as evaporator, part of
the return air through the indoor machine is heated up by the second heat exchanger,
and the other part is dehumidified and refrigerated by the third heat exchanger, the
processed hot and cold air is mixed and sent indoor; the opening of the third electronic
expansion valve is controlled according to the difference between the temperatures
acquired by the second temperature sensor and the third temperature sensor.
19. The method of claim 17, wherein the Operation C further comprises:
the first terminal and the fourth terminal of the four way reversing valve connects,
and the second and the third terminal of the four way reversing valve connects, the
refrigerant flows orderly through the fourth terminal of the four way reversing valve,
the first stop valve, the third heat exchanger, the third electronic expansion valve,
the second heat exchanger, the second electronic expansion valve, the second stop
valve, the first electronic expansion valve, the first heat exchanger, the second
terminal of the four way reversing valve, and enters into an inlet of the compressor
from the third terminal of the four way reversing valve through the gas liquid separator;
wherein, the third electronic expansion valve is fully open, and the first electronic
expansion valve and the second electronic expansion valve throttle, the first heat
exchanger works as an evaporator, and the second heat exchanger and the third heat
exchanger both work as condensers, the high temperature air from the indoor machine
heats up the indoor; the opening of the second electronic expansion valve is controlled
according to the difference between the condensation temperature of the high pressure
refrigerant and the temperature acquired by the first temperature sensor.