[TECHNICAL FIELD]
[0001] The present invention relates to a heat pump cycle device which circulates heat medium
through a use-side terminal by a heat medium circuit having a gas-liquid separator.
[BACKGROUND TECHNIQUE]
[0002] Patent document 1 describes a hydronic heater including a pressure relief valve and
an air vent valve in a pipe of a water circuit of a heat pump cycle device having
an outdoor machine and an indoor machine. The patent document 1 discloses a configuration
in which the hydronic heater is provided outside of a casing of the outdoor machine,
in a valve chamber which is different from a machine chamber, in a valve chamber in
the machine chamber or in a blower device chamber.
[PRIOR ART DOCUMENT]
[PATENT DOCUMENT]
[SUMMARY OF THE INVENTION]
[PROBLEM TO BE SOLVED BY THE INVENTION]
[0004] However, when the pressure relief valve and the air vent valve are placed outside
of the casing of the outdoor machine, or in the valve chamber which is different from
the machine chamber, or in the valve chamber in the machine chamber, a structure thereof
becomes complicated and it requires time and effort to perform maintenance to separate
the machine chamber and the valve chamber from each other, and since refrigerant is
diffused naturally at the time of both energization and non-energization, the refrigerant
cannot be diffused sufficiently.
[0005] Further, when the pressure relief valve and the air vent valve are placed in a blower
device chamber, it is necessary to seal the same by passing a conduit pipe through
a divider between the blower device chamber and the machine chamber, a structure thereof
becomes complicated, and when refrigerant leaks at the time of other than energization,
there is a possibility that refrigerant remains in the outdoor machine.
[0006] It is an object of the present invention to provide a heat pump cycle device capable
of discharging leaked flammable refrigerant not into an outdoor machine including
a machine chamber and a valve chamber but into a space outside the outdoor machine,
and capable of swiftly diffusing the refrigerant especially at the time of energization.
[MEANS FOR SOLVING THE PROBLEM]
[0007] A heat pump cycle device of the present invention described in claim 1 includes:
a refrigerant circuit 10 formed by annularly connecting a compressor 11, a use-side
heat exchanger 12, expansion means 13 and a heat source-side heat exchanger 14 to
one another, and refrigerant being circulated through the refrigerant circuit 10;
a heat medium circuit 20 for circulating heat medium cooled or heated by the use-side
heat exchanger 12 through a use-side terminal 1 by means of the refrigerant discharged
from the compressor 11; a blower device 16 for flowing air through the heat source-side
heat exchanger 14; an electric component box 90 for accommodating a control board
therein; and a gas-liquid separator 30 for separating gas in the heat medium circuit
20 from the heat medium; in which flammable refrigerant is used as the refrigerant,
wherein the gas-liquid separator 30 is placed in the heat medium circuit 20 which
is located downstream of the use-side heat exchanger 12, the heat pump cycle device
further comprises a flow path pipe 80 for discharging the gas separated by the gas-liquid
separator 30, and a flow path pipe exit 81 of the flow path pipe 80 is placed in an
air suction surface 14i of the heat source-side heat exchanger 14.
[0008] According to the invention described in claim 2, in the heat pump cycle device described
in claim 1, the flow path pipe exit 81 is located lower than a flow path pipe entrance
82 of the flow path pipe 80.
[0009] According to the invention described in claim 3, in the heat pump cycle device described
in claim 1, the flow path pipe exit 81 is located lower than the electric component
box 90.
[0010] According to the invention described in claim 4, in the heat pump cycle device described
in claim 1, a gas-venting valve 50 through which the gas separated by the gas-liquid
separator 30 is discharged is provided in an upper portion of the gas-liquid separator
30.
[0011] According to the invention described in claim 5, in the heat pump cycle device described
in claim 1, a pressure relief valve 40 is provided in the heat medium circuit 20 which
is located downstream of the use-side heat exchanger 12.
[0012] According to the invention described in claim 6, in the heat pump cycle device described
in claim 1, a machine chamber 3b where the compressor 11 is placed and a heat medium
chamber 3a where the use-side heat exchanger 12 is placed are divided by a first divider
71, the first divider 71 is provided with an opening 70, and the flow path pipe 80
is placed in the opening 70.
[EFFECT OF THE INVENTION]
[0013] In the present invention, a flow path pipe exit of a flow path pipe through which
gas separated by a gas-liquid separator is discharged is placed in an air suction
surface of a heat source-side heat exchanger. According to this, leaked refrigerant
can be discharged into a space outside of an outdoor machine not into the outdoor
machine. Further, refrigerant can swiftly be diffused by suction action of a blower
device during energization.
[BRIEF DESCRIPTION OF THE DRAWINGS]
[0014]
Fig. 1 is a refrigerating circuit diagram of a heat pump cycle device according to
an embodiment of the present invention;
Fig. 2 is a perspective view showing essential portions as viewed from a front surface
of an outdoor unit of the heat pump cycle device;
Fig. 3 is a perspective view as viewed from a rear surface of the outdoor unit of
the heat pump cycle device;
Fig. 4 is a perspective view showing a heat medium circuit of the outdoor unit; and
Figs. 5 are conceptual configuration diagrams showing the outdoor unit of the heat
pump cycle device.
[MODE FOR CARRYING OUT THE INVENTION]
[0015] In a heat pump cycle device according to a first embodiment of the present invention,
the gas-liquid separator is placed in the heat medium circuit which is located downstream
of the use-side heat exchanger, the heat pump cycle device further comprises a flow
path pipe for discharging the gas separated by the gas-liquid separator, and a flow
path pipe exit of the flow path pipe is placed in an air suction surface of the heat
source-side heat exchanger. According to this embodiment, the flow path pipe exit
of the flow path pipe through which gas separated by the gas-liquid separator is placed
in the air suction surface of the heat source-side heat exchanger. Therefore, the
leaked refrigerant can be discharged into a space outside of the outdoor machine not
into the outdoor machine, and the refrigerant can swiftly be diffused by suction action
of the blower device during energization.
[0016] According to a second embodiment of the invention, in the heat pump cycle device
of the first embodiment, the flow path pipe exit is located lower than a flow path
pipe entrance of the flow path pipe. According to this embodiment, flammable refrigerant
is easily discharged from the flow path pipe exit, and it is possible to prevent rainwater
or dew condensation water from collecting in the flow path pipe.
[0017] According to a third embodiment of the invention, in the heat pump cycle device of
the first embodiment, the flow path pipe exit is located lower than the electric component
box. According to this embodiment, heat medium or water discharged from the flow path
pipe does not splash on an electric component box in which a control board as an ignition
source is accommodated.
[0018] According to a fourth embodiment of the invention, in the heat pump cycle device
of the first embodiment, a gas-venting valve 50 through which the gas separated by
the gas-liquid separator is discharged is provided in an upper portion of the gas-liquid
separator. According to this embodiment, separated gas can be collected efficiently,
and the gas can be discharged without reversely flowing.
[0019] According to a fifth embodiment of the invention, in the heat pump cycle device of
the first embodiment, a pressure relief valve is provided in the heat medium circuit
which is located downstream of the use-side heat exchanger. According to this embodiment,
when pressure of the heat medium rises, the heat medium can be discharged, and when
ability of the gas-liquid separator is insufficient, gas in the heat medium circuit
can be discharged from the pressure relief valve together with heat medium.
[0020] According to a sixth embodiment of the invention, in the heat pump cycle device of
the first embodiment, a machine chamber where the compressor is placed and a heat
medium chamber where the use-side heat exchanger is placed are divided by a first
divider, the first divider is provided with an opening, and the flow path pipe is
placed in the opening. According to this embodiment, by securing air permeability
by the opening in which the flow path pipe is placed, the heat medium chamber is not
filled with leaked refrigerant.
[EMBODIMENT]
[0021] An embodiment of the present invention will be described below with reference to
the drawings.
[0022] Fig. 1 is a refrigerating circuit diagram of a heat pump cycle device of the embodiment.
[0023] The heat pump cycle device of the embodiment includes a refrigerant circuit 10 and
a heat medium circuit 20.
[0024] The refrigerant circuit 10 is formed by annularly connecting a compressor 11, a use-side
heat exchanger 12, expansion means 13 and a heat source-side heat exchanger 14 to
one another through a refrigerant pipe, and refrigerant circulates through the refrigerant
circuit 10.
[0025] The heat medium circuit 20 circulates heat medium heated by the use-side heat exchanger
12 through a use-side terminal 1 by refrigerant which is discharged from the compressor
11.
[0026] The heat medium circuit 20 includes a gas-liquid separator 30 which separates gas
in the heat medium circuit 20 from the heat medium, and a transportation pump 21 for
circulating the heat medium.
[0027] The heat medium circuit 20 further includes a pressure relief valve 40. In this embodiment,
the pressure relief valve 40 is connected to the gas-liquid separator 30. A gas-venting
valve 50 which discharges gas separated by the gas-liquid separator 30 is connected
to the gas-liquid separator 30.
[0028] The transportation pump 21 is placed in an indoor unit 2.
[0029] It is preferable that the refrigerant circuit 10 includes a four-way valve 15 for
switching flow of refrigerant.
[0030] A blower device 16 is provided at a position opposed to the heat source-side heat
exchanger 14. The blower device 16 flows air through the heat source-side heat exchanger
14.
[0031] As the refrigerant, propane which is flammable refrigerant is used. Instead of the
flammable refrigerant, it is possible to use any of R1234yf, R1234ze and R32 which
are mildly flammable refrigerants.
[0032] Water or antifreeze liquid is used as the heat medium.
[0033] The gas-liquid separator 30 and the pressure relief valve 40 are placed in the heat
medium circuit 20 located downstream of the use-side heat exchanger 12.
[0034] An outdoor unit 3 is divided into a heat medium chamber 3a (see Fig. 2), a machine
chamber 3b and a blower chamber 3c.
[0035] At least a portion of the use-side heat exchanger 12, the gas-liquid separator 30,
the pressure relief valve 40 and the gas-venting valve 50 are placed in the heat medium
chamber 3a. The compressor 11, the expansion means 13 and the four-way valve 15 are
placed in the machine chamber 3b. The heat source-side heat exchanger 14 and the blower
device 16 are placed in the blower chamber 3c.
[0036] It is possible to heat or cool the heat medium by switching of the four-way valve
15.
[0037] When the heat medium is heated, refrigerant which is compressed by the compressor
11 flows through the use-side heat exchanger 12, the expansion means 13 and the heat
source-side heat exchanger 14 in this order, the refrigerant is decompressed by the
expansion means 13, and the refrigerant which absorbs heat in the heat source-side
heat exchanger 14 is sucked into the compressor 11. By flowing the refrigerant which
is compressed by the compressor 11 to the use-side heat exchanger 12 in this manner,
heat medium can be heated.
[0038] When heat medium is cooled, refrigerant which is compressed by the compressor 11
flows through the heat source-side heat exchanger 14, the expansion means 13 and the
use-side heat exchanger 12 in this order, the refrigerant is decompressed by the expansion
means 13, and the refrigerant which absorbs heat in the use-side heat exchanger 12
is sucked into the compressor 11. By flowing the refrigerant compressed by the compressor
11 into the heat source-side heat exchanger 14 in this manner, the heat medium can
be cooled.
[0039] The heat medium which is cooled or heated by the use-side heat exchanger 12 is transported
to the use-side terminal 1 by the transportation pump 21, and the heat medium which
is heat-absorbed or heat-radiated in the use-side terminal 1 is returned to the use-side
heat exchanger 12.
[0040] Especially when a plat-type heat exchanger is used as the use-side heat exchanger
12, there is a possibility that refrigerant flowing through the refrigerant circuit
10 is mixed into the heat medium circuit 20 due to damage of the use-side heat exchanger
12.
[0041] Refrigerant which leaks into the heat medium circuit 20 in this manner can be discharged
from the discharge gas-venting valve 50 by separating the refrigerant from liquid
phase heat medium by the gas-liquid separator 30.
[0042] The gas-venting valve 50 is provided with a flow path pipe 80 which discharges gas
separated by the gas-liquid separator 30. A flow path pipe exit 81 of the flow path
pipe 80 is placed in an air suction surface 14i of the heat source-side heat exchanger
14.
[0043] Sine the gas-liquid separator 30 is placed in the heat medium circuit 20 which is
located downstream of the use-side heat exchanger 12 in the outdoor unit 3, refrigerant
which leaks into the heat medium circuit 20 is prevented from flowing into the use-side
terminal 1.
[0044] The gas-liquid separator 30 separates the leaked refrigerant from heat medium. Further,
the gas-liquid separator 30 can also separate air existing in the heat medium circuit
20. Especially when the heat pump cycle device is installed, the gas-liquid separator
30 is utilized for air-venting from the heat medium circuit 20 at the time of charging
heat medium into the heat medium circuit 20.
[0045] Although the transportation pump 21 is placed in the indoor unit 2 in this embodiment,
the transportation pump 21 may be placed in the outdoor unit 3. When the transportation
pump 21 is placed in the outdoor unit 3, it is preferable that the transportation
pump 21 is placed in the heat medium chamber 3a.
[0046] Figs. 2 and 3 are perspective views showing essential portions of the outdoor unit
of the heat pump cycle device, wherein Fig. 2 is the perspective view as viewed from
a front surface of outdoor unit and Fig. 3 is the perspective view as viewed from
a rear surface thereof.
[0047] The outdoor unit 3 includes a wall surface material 60 between a bottom surface material
outer periphery 3d and a ceiling surface material outer periphery 3e. The wall surface
material 60 includes a first wall surface material 61 and a second wall surface material
62 which is adjacent to the first wall surface material 61.
[0048] The heat medium chamber 3a and the machine chamber 3b are divided from each other
by a first divider 71. The first divider 71 is provided with an opening 70 (see Figs.
5), and the flow path pipe 80 is placed in the opening 70. Air permeability is secured
between the heat medium chamber 3a and the machine chamber 3b by the opening 70. The
machine chamber 3b and the blower chamber 3c are divided from each other by a second
divider 72. According to this, the outdoor unit 3 is divided into the heat medium
chamber 3a, the machine chamber 3b and the blower chamber 3c. The first divider 71
prevents heat medium which leaks from the use-side heat exchanger 12 of the heat medium
circuit 20
and the pressure relief valve 40 and the like from scattering to the compressor 11
and the like placed in the machine chamber 3b.
[0049] The opening 70 is formed between one side 71x of the first divider 71 and the second
wall surface material 62, and the other side 71y (see Figs. 5) of the first divider
71 abuts against the first wall surface material 61.
[0050] The heat medium chamber 3a is formed from a space which is surrounded by the first
divider 71, the first wall surface material 61 and the second wall surface material
62.
[0051] As described above, by forming the heat medium chamber 3a in the corner portion of
the outdoor unit 3 utilizing the first wall surface material 61 and the second wall
surface material 62 which are adjacent to each other, the heat medium chamber 3a in
which the use-side heat exchanger 12, the gas-liquid separator 30 and the pressure
relief valve 40 are placed is divided from the machine chamber 3b and the blower chamber
3c. Therefore, even if heat medium leaks, the heat medium does not exert an effect
on the compressor 11, the expansion means 13 and the heat source-side heat exchanger
14.
[0052] As shown in Fig. 3, the flow path pipe exit 81 of the flow path pipe 80 is placed
in the air suction surface 14i of the heat source-side heat exchanger 14.
[0053] By placing the flow path pipe exit 81 of the flow path pipe 80 in the air suction
surface 14i of the heat source-side heat exchanger 14 in this manner, leaked refrigerant
can be discharged from the outdoor unit 3. Further, the refrigerant can swiftly be
diffused by suction action of the blower device 16 during energization.
[0054] Fig. 4 is a perspective view showing the heat medium circuit of the outdoor unit.
[0055] A heat medium first connection port 22x is formed in a lower portion of a side surface
of the use-side heat exchanger 12, and a heat medium second connection port 22y is
formed in an upper portion of the side surface of the use-side heat exchanger 12.
[0056] A refrigerant first connection port 17x is formed in a lower portion of the side
surface of the use-side heat exchanger 12, and a refrigerant second connection port
17y is formed in an upper portion of the side surface of the use-side heat exchanger
12.
[0057] Heat medium is introduced into the use-side heat exchanger 12 from the heat medium
first connection port 22x, and the heat medium introduced into the use-side heat exchanger
12 flows out from the heat medium second connection port 22y.
[0058] When heat medium is heated, refrigerant compressed by the compressor 11 is introduced
into the use-side heat exchanger 12 from the refrigerant second connection port 17y,
and the refrigerant introduced into the use-side heat exchanger 12 flows out from
the refrigerant first connection port 17x.
[0059] The heat medium second connection port 22y and a gas-liquid separation inlet 32 are
connected to each other through a gas-liquid separation inflow pipe 35.
[0060] The gas-liquid separation inlet 32 is located at a position higher than the heat
medium second connection port 22y.
[0061] By placing the gas-liquid separator 30 above the use-side heat exchanger 12 in this
manner, it becomes easy by the gas-liquid separator 30 to collect gas which is mixed
in heat medium, and gas-liquid separating efficiency can be enhanced.
[0062] An exit joint 36 is connected to a gas-liquid separation outflow of the gas-liquid
separator 30, and a heat medium first connection pipe 23 is connected to the heat
medium first connection port 22x. An entrance joint 37 is connected to the heat medium
first connection pipe 23.
[0063] The exit joint 36 and the entrance joint 37 outwardly project from the second wall
surface material 62 which is located in the heat medium chamber 3a. The exit joint
36 and the entrance joint 37 are connected to the use-side terminal 1 which is provided
inside of the chamber through a heatinsulated tube.
[0064] The gas-venting valve 50 is provided on an upper portion of the gas-liquid separator
30. A flow path pipe entrance 82 for connecting the flow path pipe 80 is provided
on an upper end of the gas-venting valve 50. The gas-venting valve 50 is provided
therein with a float. When gas does not exist in the gas-venting valve 50, the float
is located on a lower end of the gas-venting valve 50. If gas separated by the gas-liquid
separator 30 exists, the float moves to an upper portion in the gas-venting valve
50 so that the gas is discharged.
[0065] According to this, the separated gas can be discharged without flowing reversely.
[0066] The pressure relief valve 40 is connected to a pipe which branches off from a side
of the gas-liquid separator 30, and the pressure relief valve 40 is placed above the
use-side heat exchanger 12.
[0067] According to this, it becomes easy to collect gas which is not separated by the gas-liquid
separator 30 and which remains in heat medium.
[0068] The first divider 71 is provided with the opening 70. The flow path pipe 80 is placed
in the opening 70, and air permeability is secured by the opening 70. By securing
the air permeability by the opening 70 in which the flow path pipe 80 is placed, the
heat medium chamber 3a is not filled with leaked refrigerant. The opening 70 may be
provided in a portion of the first divider 71 as shown in Fig. 5(a), or the opening
70 may be a space between an end of the first divider 71 and the second wall surface
material 62 as shown in Fig. 5(c). Including these configurations, it is said that
the first divider 71 is provided with the opening 70. It is also possible to provide
a space 70' in an upper portion of the first divider 71 to secure the air permeability.
[0069] Figs. 5 are conceptual configuration diagrams showing the outdoor unit of the heat
pump cycle device, wherein Fig. 5(a) is a plan view, Fig. 5(b) is a rear view and
Fig. 5(c) is a plan view which is different from Fig. 5(a).
[0070] As shown in Figs. 5, an electric component box 90 is placed in upper portions of
the machine chamber 3b and the blower chamber 3c. A control board and the like are
accommodated in the electric component box 90.
[0071] The flow path pipe exit 81 of the flow path pipe 80 is located lower than the flow
path pipe entrance 82 of the flow path pipe 80, and the flow path pipe 80 is inclined.
The flow path pipe 80 is inclined so that the flow path pipe exit 81 is located lower
than the flow path pipe entrance 82, and the flow path pipe 80 is not directed upward
in this manner. According to this, flammable refrigerant is easily discharged from
the flow path pipe exit 81, and it is possible to prevent rainwater and dew condensation
water from collecting in the flow path pipe 80.
[0072] The flow path pipe exit 81 is located lower than the electric component box 90. Therefore,
heat medium or water discharged from the flow path pipe 80 does not splash on the
electric component box 90 in which the control board becoming an ignition source is
accommodated.
[Configuration supported by the above-described embodiment]
[0073] The above-described embodiment supports the following configurations.
(Configuration 1)
[0074] A heat pump cycle device including: : a refrigerant circuit formed by annularly connecting
a compressor, a use-side heat exchanger, expansion means and a heat source-side heat
exchanger to one another, and refrigerant being circulated through the refrigerant
circuit; a heat medium circuit for circulating heat medium cooled or heated by the
use-side heat exchanger through a use-side terminal 1 by means of the refrigerant
discharged from the compressor; a blower device for flowing air through the heat source-side
heat exchanger; an electric component box for accommodating a control board therein;
and a gas-liquid separator for separating gas in the heat medium circuit from the
heat medium; in which flammable refrigerant is used as the refrigerant, wherein the
gas-liquid separator is placed in the heat medium circuit which is located downstream
of the use-side heat exchanger, the heat pump cycle device further comprises a flow
path pipe for discharging the gas separated by the gas-liquid separator, and a flow
path pipe exit of the flow path pipe is placed in an air suction surface of the heat
source-side heat exchanger.
[0075] According to this configuration, the flow path pipe exit of the flow path pipe through
which gas separated by the gas-liquid separator is discharged is placed in the air
suction surface of the heat source-side heat exchanger. Therefore, leaked refrigerant
can be discharged to outside of the outdoor machine not into the outdoor machine,
and the refrigerant can swiftly be diffused by suction action of the blower device
during energization.
(Configuration 2)
[0076] The heat pump cycle device according to the configuration 1, wherein the flow path
pipe exit is located lower than a flow path pipe entrance of the flow path pipe.
[0077] According to this configuration, flammable refrigerant is easily discharged from
the flow path pipe exit, and it is possible to prevent rainwater or dew condensation
water from collecting in the flow path pipe.
(Configuration 3)
[0078] The heat pump cycle device according to the configuration 1 or 2, wherein the flow
path pipe exit is located lower than the electric component box.
[0079] According to this configuration, heat medium or water discharged from the flow path
pipe does not splash on the electric component box in which a control board becoming
an ignition source is accommodated.
(Configuration 4)
[0080] The heat pump cycle device according to any one of the configurations 1 to 3, wherein
a gas-venting valve 50 through which the gas separated by the gas-liquid separator
is discharged is provided in an upper portion of the gas-liquid separator.
[0081] According to this configuration, separated gas can efficiently be recovered, and
the refrigerant can be discharged without flowing reversely.
(Configuration 5)
[0082] The heat pump cycle device according to any one of the configurations 1 to 4, wherein
a pressure relief valve is provided in the heat medium circuit which is located downstream
of the use-side heat exchanger.
[0083] According to this configuration, when pressure of heat medium rises, the heat medium
can be discharged, and when ability of a gas-liquid separator is insufficient, gas
in the heat medium circuit can be discharged from the pressure relief valve together
with heat medium.
(Configuration 6)
[0084] The heat pump cycle device according to any one of the configurations 1 to 5, wherein
a machine chamber where the compressor is placed and a heat medium chamber where the
use-side heat exchanger is placed are divided by a first divider, the first divider
is provided with an opening, and the flow path pipe is placed in the opening.
[0085] According to this configuration, air permeability is secured by the opening in which
the flow path pipe is placed. Therefore, the heat medium chamber is not filled with
leaked refrigerant.
[INDUSTRIAL APPLICABILITY]
[0086] The present invention is suitable for a heat pump cycle device using flammable refrigerant.
[EXPLANATION OF SYMBOLS]
[0087]
- 1
- use-side terminal
- 2
- indoor unit
- 3
- outdoor unit
- 3a
- heat medium chamber
- 3b
- machine chamber
- 3c
- blower chamber
- 3d
- bottom surface material outer periphery
- 3e
- ceiling surface material outer periphery
- 10
- refrigerant circuit
- 11
- compressor
- 12
- use-side heat exchanger
- 13
- expansion means
- 14
- heat source-side heat exchanger
- 14i
- air suction surface
- 15
- four-way valve
- 16
- blower device
- 17x
- refrigerant first connection port
- 17y
- refrigerant second connection port
- 20
- heat medium circuit
- 21
- transportation pump
- 22x
- heat medium first connection port
- 22y
- heat medium second connection port
- 23
- heat medium first connection pipe
- 30
- gas-liquid separator
- 32
- gas-liquid separation inlet
- 35
- gas-liquid separation inflow pipe
- 36
- exit joint
- 37
- entrance joint
- 40
- pressure relief valve
- 50
- gas-venting valve
- 60
- wall surface material
- 61
- first wall surface material
- 62
- second wall surface material
- 70
- opening
- 70'
- space
- 71
- first divider
- 71x
- one side
- 71y
- other side
- 72
- second divider
- 80
- flow path pipe
- 81
- flow path pipe exit
- 82
- flow path pipe entrance
- 90
- electric component box