MULTI-SPLIT UNIT OPERATIONAL CAPACITY DETECTION METHOD, MULTI-SPLIT UNIT, STORAGE MEDIUM, AND DEVICE

Abstract

 The present application discloses a multi-split unit operational capacity detection method, a multi-split unit, a storage medium, and a device. Compared with existing schemes in which only the overall energy consumption of a multi-split unit is detected, in the present application, hydraulic module data of a heat-recovery multi-split unit is acquired; the amount of heat of an outdoor unit absorbed by a hydraulic module is determined on the basis of the hydraulic module data; outdoor unit data and indoor unit data of the heat-recovery multi-split unit are acquired; the heating capacity of a condenser and the cooling capacity of an evaporator are determined on the basis of the outdoor unit data, of the indoor unit data, and of the hydraulic module data; the heating capacity of a heating indoor unit and the cooling capacity of a cooling indoor unit are determined on the basis of the heat absorption capacity of the hydraulic module, of the heating capacity of the condenser, and of the cooling capacity of the evaporator; and the operational capacity of the heat-recovery multi-split unit is determined on the basis of the heating capacity of the heating indoor unit, of the cooling capacity of the cooling indoor unit, and of the amount of heat of the outdoor unit absorbed by the hydraulic module.

Description

[0001] This application claims priority to Chinese Patent Application No. 202110086219.8, titled "MULTI-SPLIT AIR CONDITIONER OPERATIONAL CAPACITY DETECTION METHOD, MULTI-SPLIT AIR CONDITIONER, STORAGE MEDIUM, AND APPARATUS", and filed with China National Intellectual Property Administration on January 21, 2021, the entire content of which is incorporated herein by reference.

FIELD

[0002] The present disclosure relates to the field of air conditioner technologies, and, more particularly, to a multi-split air conditioner operational capacity detection method, a multi-split air conditioner, a storage medium, and an apparatus.

BACKGROUND

[0003] With the continuous progress of society and the ongoing development of science and technology, the use of a multi-split air conditioner as a heating, ventilation, and air conditioning device for a building is becoming more and more widespread. An existing heat recovery multi-split air conditioner system requires cooling, heating, and provision of hot water, which results in high energy consumption.

[0004] In addition, instead of detecting a cooling capacity and a heating capacity generated by a heat recovery multi-split air conditioner separately, an existing power consumption detection system can only detect overall energy consumption of the multi-split air conditioner. Thus, it is impossible to analyze an operational capacity of the heat recovery multi-split air conditioner.

[0005] The above content is intended to assist in understanding of technical solutions of the present disclosure only, and does not represent an admission that the above content is the related art.

SUMMARY

[0006] Embodiments of the present disclosure provide a multi-split air conditioner operational capacity detection method, a multi-split air conditioner, a storage medium, and an apparatus, which can solve a technical problem in the related art of an inability to detect an operational capacity of a heat recovery multi-split air conditioner.

[0007] Embodiments of the present disclosure provide a multi-split air conditioner operational capacity detection method. The multi-split air conditioner operational capacity detection method includes acquiring hydraulic device data of a heat recovery multi-split air conditioner and determining hydraulic device absorption outdoor unit heat quantity based on the hydraulic device data; acquiring outdoor unit data and indoor unit data of the heat recovery multi-split air conditioner; determining a condenser heating capacity and an evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data; determining a heating indoor unit heating capacity and a cooling indoor unit cooling capacity based on a hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity; and determining an operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity.

[0008] In one embodiment, the determining the heating indoor unit heating capacity and the cooling indoor unit cooling capacity based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity includes: acquiring a current operation mode of the heat recovery multi-split air conditioner; determining a heating indoor unit capacity ratio and a cooling indoor unit capacity ratio based on the current operation mode; determining the heating indoor unit heating capacity based on the heating indoor unit capacity ratio, the hydraulic device heat absorption value, and the condenser heating capacity; and determining the cooling indoor unit cooling capacity based on the cooling indoor unit capacity ratio and the evaporator cooling capacity.

[0009] In one embodiment, the determining the heating indoor unit capacity ratio and the cooling indoor unit capacity ratio based on the current operation mode includes: determining a first predetermined value as the cooling indoor unit capacity ratio when the current operation mode is a predetermined main cooling mode; extracting an indoor unit heat transfer coefficient, an indoor unit heat transfer area, and an indoor unit inside ambient temperature from the indoor unit data; extracting an outdoor unit heat transfer coefficient, an outdoor unit heat transfer area, and an outdoor unit ambient temperature from the outdoor unit data; and acquiring a high-pressure saturation temperature of the heat recovery multi-split air conditioner, and determining the heating indoor unit capacity ratio based on the indoor unit heat transfer coefficient, the indoor unit heat transfer area, the high-pressure saturation temperature, the indoor unit inside ambient temperature, the outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature.

[0010] In one embodiment, the determining the heating indoor unit capacity ratio and the cooling indoor unit capacity ratio based on the current operation mode includes: determining a second predetermined value as the heating indoor unit capacity ratio when the current operation mode is a predetermined main heating mode; extracting an indoor unit valve flow coefficient from the indoor unit data; extracting an outdoor unit valve flow coefficient from the outdoor unit data; and determining the cooling indoor unit capacity ratio based on the indoor unit valve flow coefficient and the outdoor unit valve flow coefficient.

[0011] In one embodiment, the acquiring the hydraulic device data of the heat recovery multi-split air conditioner and determining the hydraulic device absorption outdoor unit heat quantity based on the hydraulic device data includes: acquiring the hydraulic device data of the heat recovery multi-split air conditioner and determining a compressor power, an exhaust pressure, a condenser inlet temperature, a condenser outlet temperature, and a compressor circulation flow rate of a hydraulic device based on the hydraulic device data; determining a condenser inlet-outlet enthalpy difference based on the exhaust pressure, the condenser inlet temperature, and the condenser outlet temperature; determining a hydraulic device hot water production capacity based on the compressor circulation flow rate of the hydraulic device and the condenser inlet-outlet enthalpy difference; and determining the hydraulic device absorption outdoor unit heat quantity based on the hydraulic device hot water production capacity and the compressor power.

[0012] In one embodiment, the determining the condenser heating capacity and the evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data includes: determining a condenser average inlet enthalpy, a condenser average outlet enthalpy, an evaporator average outlet enthalpy, and an evaporator inlet enthalpy based on the outdoor unit data, the indoor unit data, and the hydraulic device data; extracting a compressor circulation flow rate of an outdoor unit from the outdoor unit data; determining the condenser heating capacity based on the compressor circulation flow rate, the condenser average inlet enthalpy, and the condenser average outlet enthalpy; and determining the evaporator cooling capacity based on the compressor circulation flow rate, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy.

[0013] In one embodiment, the determining the condenser average inlet enthalpy, the condenser average outlet enthalpy, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy based on the outdoor unit data, the indoor unit data, and the hydraulic device data includes: extracting a compressor return gas pressure, an external heat exchanger inlet temperature, an external heat exchanger outlet temperature, and a compressor exhaust pressure of the outdoor unit from the outdoor unit data; extracting a heat exchanger inlet temperature of a heating indoor unit, an outlet temperature of the heating indoor unit, and an outlet temperature of a cooling indoor unit from the indoor unit data; extracting a heat exchanger inlet temperature and a heat exchanger outlet temperature of a hydraulic device from the hydraulic device data; determining the condenser average inlet enthalpy based on the heat exchanger inlet temperature of the hydraulic device, the heat exchanger inlet temperature of the heating indoor unit, the external heat exchanger inlet temperature, and the compressor exhaust pressure; determining the condenser average outlet enthalpy based on the heat exchanger outlet temperature of the hydraulic device, the outlet temperature of the heating indoor unit, and the external heat exchanger outlet temperature, and determining the condenser average outlet enthalpy as the evaporator inlet enthalpy; and determining the evaporator average outlet enthalpy based on the cooling indoor unit outlet temperature and the compressor return gas pressure.

[0014] Embodiments of the present disclosure provide a multi-split air conditioner. The multi-split air conditioner includes a memory, a processor, and a multi-split air conditioner operational capacity detection program stored on the memory and executable on the processor. The multi-split air conditioner operational capacity detection program is configured to implement the multi-split air conditioner operational capacity detection method as described above.

[0015] Embodiments of the present disclosure provide a storage medium, having a multi-split air conditioner operational capacity detection program stored thereon. The multi-split air conditioner operational capacity detection program, when executed by a processor, implements the multi-split air conditioner operational capacity detection method as described above.

[0016] Embodiments of the present disclosure provide a multi-split air conditioner operational capacity detection apparatus. The multi-split air conditioner operational capacity detection apparatus includes a determination module, an acquiring module, and a detection module. The determination module is configured to acquire hydraulic device data of a heat recovery multi-split air conditioner and determine hydraulic device absorption outdoor unit heat quantity based on the hydraulic device data. The acquiring module is configured to acquire outdoor unit data and indoor unit data of the heat recovery multi-split air conditioner. The determination module is further configured to determine a condenser heating capacity and an evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data. The determination module is further configured to determine a heating indoor unit heating capacity and a cooling indoor unit cooling capacity based on a hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity. The detection module is configured to determine an operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity.

[0017] In the present disclosure, the hydraulic device data of the heat recovery multi-split air conditioner is acquired, and the hydraulic device absorption outdoor unit heat quantity is determined based on the hydraulic device data. Further, the outdoor unit data and the indoor unit data of the heat recovery multi-split air conditioner are acquired. The condenser heating capacity and the evaporator cooling capacity are determined based on the outdoor unit data, the indoor unit data, and the hydraulic device data, and the heating indoor unit heating capacity and the cooling indoor unit cooling capacity are determined based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity. Furthermore, the operational capacity of the heat recovery multi-split air conditioner is determined based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity. Compared with an existing method of only detecting overall energy consumption of the multi-split air conditioner, in the present disclosure, it is possible to determine the heating indoor unit heating capacity and the cooling indoor unit cooling capacity based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity, and determine the operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity. Therefore, a defect in the cooling capacity and the heating capacity generated by the heat recovery multi-split air conditioner can be detected. Accordingly, the operational capacity of the heat recovery multi-split air conditioner can be detected.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 

FIG. 1 is a schematic structural diagram of a hardware operating environment of a multi-split air conditioner involved in a solution according to an embodiment of the present disclosure.

FIG. 2 is a flowchart illustrating an embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure.

FIG. 3 is a schematic diagram of a heat recovery multi-split air conditioner system according to an embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure.

FIG. 4 is a flowchart illustrating another embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure.

FIG. 5 is a flowchart illustrating yet another embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure.

FIG. 6 is a schematic diagram of a heat recovery multi-split air conditioner system operating in a main cooling mode according to an embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure.

FIG. 7 is a schematic diagram of a refrigerant flow when a heat recovery multi-split air conditioner system according to an embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure operates in a main cooling mode.

FIG. 8 is a flowchart illustrating still yet another embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure.

FIG. 9 is a schematic diagram of a heat recovery multi-split air conditioner system operating in a main heating mode according to an embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure.

FIG. 10 is a schematic diagram of a refrigerant flow when a heat recovery multi-split air conditioner system according to an embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure operates in a main heating mode.

FIG. 11 is a block diagram showing a structure of an embodiment of a multi-split air conditioner operational capacity detection apparatus of the present disclosure.

[0019] Reference numerals of the accompanying drawings:

Numeral	Name	Numeral	Name
1	outdoor unit	21	refrigerant switching device heating solenoid valve
11	outdoor unit interior compressor	22	refrigerant switching device cooling solenoid valve
12	four-way valve	23	refrigerant switching device heating solenoid valve
13	four-way valve	24	refrigerant switching device cooling solenoid valve
14	external heat exchanger	3	indoor unit
15	outdoor unit main electronic expansion valve	31	indoor unit electronic expansion valve
16	economizer	32	indoor unit heat exchanger
17	economizer auxiliary electronic expansion valve	4	hydraulic device
18	liquid pipe stop valve	41	hydraulic device compressor
19	high-pressure gas pipe stop valve	42	hydraulic device condenser
110	low-pressure gas pipe stop valve	43	first hydraulic device electronic expansion valve
111	low-pressure tank	44	hydraulic device evaporator
2	refrigerant switching device	45	second hydraulic device electronic expansion valve

[0020] Implementations of the objects, functional features, and advantages of the present disclosure will be further described in connection with the embodiments and with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be understood that specific embodiments described herein are intended to explain the present disclosure only, rather than to limit the present disclosure.

[0022] Reference can be made to FIG. 1. FIG. 1 is a schematic structural diagram of a hardware operating environment of a multi-split air conditioner involved according to an embodiment of the present disclosure.

[0023] As illustrated in FIG. 1, the multi-split air conditioner may include a processor 1001 such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is configured to implement connection and communication between these components. The user interface 1003 may include a display. In some embodiments, the user interface 1003 may further include a standard wired interface and a wireless interface. In the present disclosure, the wired interface of the user interface 1003 may be a Universal Serial Bus (USB) interface. In some embodiments, the network interface 1004 may include a standard wired interface and a wireless interface (e.g., a Wireless-Fidelity (WI-FI) interface). The memory 1005 may be a high-speed Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk memory. In some embodiments, the memory 1005 may further be a storage device independent of the aforementioned processor 1001.

[0024] It should be understood by those skilled in the art that the structure illustrated in FIG. 1 does not constitute a limitation on the multi-split air conditioner. The heat recovery multi-split air conditioner may include more or fewer components than those illustrated in the figure, or combine some components, or have different arrangements of the components.

[0025] As illustrated in FIG. 1, the memory 1005 regarded as a computer storage medium may include an operating system, a network communication device, a user interface device, and a multi-split air conditioner operational capacity detection program.

[0026] In the multi-split air conditioner illustrated in FIG. 1, the network interface 1004 is mainly configured to connect to a backend server to perform data communication with the backend server. The user interface 1003 is mainly configured to connect to a user device. The multi-split air conditioner invokes, through the processor 1001, the multi-split air conditioner operational capacity detection program stored in the memory 1005, and performs the multi-split air conditioner operational capacity detection method according to the embodiments of the present disclosure.

[0027] Based on the above hardware structure, embodiments of the multi-split air conditioner operational capacity detection method of the present disclosure are provided.

[0028] Reference can be made to FIG. 2, and FIG. 2 is a flowchart illustrating an embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure. As illustrated in FIG. 2, an embodiment of the multi-split air conditioner operational capacity detection method of the present disclosure is provided.

[0029] At block S10, hydraulic device data of a heat recovery multi-split air conditioner is acquired, and hydraulic device absorption outdoor unit heat quantity is determined based on the hydraulic device data.

[0030] It should be understood that an executive body of the embodiment is the multi-split air conditioner. The multi-split air conditioner may be a heat recovery multi-split air conditioner, and the present disclosure is not limited in this regard.

[0031] It should be noted that the hydraulic device data may include a compressor power, an exhaust pressure, a condenser inlet temperature, a condenser outlet temperature, and a compressor circulation flow rate of a hydraulic device, and the embodiment is not limited in this regard.

[0032] It should be understood that acquiring the hydraulic device data of the heat recovery multi-split air conditioner may include: acquiring the hydraulic device data of the heat recovery multi-split air conditioner through a predetermined sensor provided on the hydraulic device. The predetermined sensor may be preset by a manufacturer of the heat recovery multi-split air conditioner, and the present disclosure is not limited to this embodiment.

[0033] It should be understood that determining the hydraulic device heat absorption value based on the hydraulic device data may include: determining the hydraulic device heat absorption value based on the hydraulic device data through a predetermined heat absorption model. The predetermined heat absorption model may be preset by the manufacturer of the heat recovery multi-split air conditioner, and the present disclosure is not limited in this embodiment.

[0034] Further, in order to improve accuracy and reliability of the hydraulic device absorption outdoor unit heat quantity, the operation at block S10 includes: acquiring the hydraulic device data of the heat recovery multi-split air conditioner and determining a compressor power, an exhaust pressure, a condenser inlet temperature, a condenser outlet temperature, and a compressor circulation flow rate of a hydraulic device based on the hydraulic device data; determining a condenser inlet-outlet enthalpy difference based on the exhaust pressure, the condenser inlet temperature, and the condenser outlet temperature; determining a hydraulic device hot water production capacity based on the compressor circulation flow rate of the hydraulic device and the condenser inlet-outlet enthalpy difference; and determining the hydraulic device absorption outdoor unit heat quantity based on the hydraulic device hot water production capacity and the compressor power.

[0035] It should be understood that determining the hydraulic device hot water production capacity based on the compressor circulation flow rate of the hydraulic device and the condenser inlet-outlet enthalpy difference may be that the hydraulic device hot water production capacity=the compressor circulation flow rate * the condenser inlet-outlet enthalpy difference.

[0036] It should be understood that determining the hydraulic device absorption outdoor unit heat quantity based on the hydraulic device hot water production capacity and the compressor power may mean that the hydraulic device absorption outdoor unit heat quantity = the hydraulic device hot water production capacity * the compressor power.

[0037] In an exemplary implementation, for ease of understanding, description is made with reference to FIG. 3. FIG. 3 is a schematic diagram of a heat recovery multi-split air conditioner system. In FIG. 3, the outdoor unit of the heat recovery multi-split air conditioner system is denoted at 1, the refrigerant switching device is denoted by 2, the indoor unit of a heat recovery multi-split air conditioner system is denoted at 3, and the high-temperature hydraulic device is denoted at 4. An interior of the outdoor unit is provided with a compressor 11, a four-way valve 12 for switching a state of an external heat exchanger 14 to determine whether the external heat exchanger 14 is used as the evaporator or the condenser, a four-way valve 13 for switching a state of a high-pressure gas pipe. In addition, the external heat exchanger is denoted at 14, an outdoor unit main electronic expansion valve is denoted at 15, an economizer is denoted at 16, an economizer auxiliary electronic expansion valve is denoted at 17, a liquid pipe stop valve is denoted at 18, a high-pressure gas pipe stop valve is denoted at 19, a low-pressure gas pipe stop valve is denoted at 110, and a low-pressure tank is denoted at 111, refrigerant switching device heating solenoid valves are denoted at 21 and 23, refrigerant switching device cooling solenoid valves are denoted at 22 and 24, an indoor unit electronic expansion valve is denoted at 31, an indoor unit heat exchanger is denoted at 32, a hydraulic device compressor is denoted at 41, a hydraulic device condenser for heat exchange between a refrigerant of the hydraulic device and water is denoted at 42, a first hydraulic device electronic expansion valve is denoted at 43, a hydraulic device evaporator for heat exchange between a refrigerant in the hydraulic device and a refrigerant of the outdoor unit is denoted at 44, and a second hydraulic device electronic expansion valve is denoted at 45, which controls a flow rate of a refrigerant from the outdoor unit into the hydraulic device.

[0038] At block S20, outdoor unit data and indoor unit data of the heat recovery multi-split air conditioner are acquired.

[0039] It should be noted that the outdoor unit data may include data such as a compressor return gas pressure, an external heat exchanger inlet temperature, an external heat exchanger outlet temperature, and a compressor exhaust pressure of an outdoor unit, and the present disclosure is not limited to this embodiment. The indoor unit data may be data such as a heat exchanger inlet temperature of a heating indoor unit, an outlet temperature of the heating indoor unit, and an outlet temperature of an indoor cooling unit, and the present disclosure is not limited to this embodiment. The power consumption data may include first power consumption data and second power consumption data. The first power consumption data may be power consumption data of the outdoor unit. The second power consumption data may be power consumption data of the hydraulic device. The embodiment is not limited in this regard.

[0040] At block S30, a condenser heating capacity and an evaporator cooling capacity are determined based on the outdoor unit data, the indoor unit data, and the hydraulic device data.

[0041] It should be noted that the condenser heating capacity may be used to represent a total condensing capacity. When the heat recovery multi-split air conditioner is in a main cooling mode, the total condensing capacity includes a heat exchanger capacity of the outdoor unit, a heating indoor unit capacity, and the hydraulic device absorption outdoor unit heat quantity. When the heat recovery multi-split air conditioner is in a main heating mode, the total condensing capacity includes the heating indoor unit capacity and the hydraulic device absorption outdoor unit heat quantity.

[0042] The evaporator cooling capacity may be used to represent a total evaporation capacity. When the heat recovery multi-split air conditioner is in the main cooling mode, the total evaporation capacity includes a cooling indoor unit total capacity. When the heat recovery multi-split air conditioner is in the main heating mode, the total evaporation capacity includes the cooling indoor unit total capacity and the heat exchanger capacity of the outdoor unit.

[0043] It should be understood that determining the condenser heating capacity and the evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data may include: determining a condenser average inlet enthalpy, a condenser average outlet enthalpy, an evaporator average outlet enthalpy, and an evaporator inlet enthalpy based on the outdoor unit data, the indoor unit data, and the hydraulic device data; extracting a compressor circulation flow rate of an outdoor unit from the outdoor unit data; determining the condenser heating capacity based on the compressor circulation flow rate, the condenser average inlet enthalpy, and the condenser average outlet enthalpy; and determining the evaporator cooling capacity based on the compressor circulation flow rate, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy.

[0044] At block S40, a heating indoor unit heating capacity and a cooling indoor unit cooling capacity are determined based on a hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity.

[0045] It should be understood that determining the heating indoor unit heating capacity and the cooling indoor unit cooling capacity based on the hydraulic device heat absorption value, the condenser heating capacity and the evaporator cooling capacity may include: acquiring a current operation mode of the heat recovery multi-split air conditioner; determining a heating indoor unit capacity ratio and a cooling indoor unit capacity ratio based on the current operation mode; determining the heating indoor unit heating capacity based on the heating indoor unit capacity ratio, the hydraulic device heat absorption value, and the condenser heating capacity; and determining the cooling indoor unit cooling capacity based on the cooling indoor unit capacity ratio and the evaporator cooling capacity.

[0046] At block S50, the operational capacity of the heat recovery multi-split air conditioner is determined based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity.

[0047] It should be noted that the operational capacity of the heat recovery multi-split air conditioner is a total heat recovery capacity of the heat recovery multi-split air conditioner. The embodiment is not limited in this regard.

[0048] It should be understood that determining the operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity may be that the total heat recovery capacity = the heating indoor unit heating capacity + the cooling indoor unit cooling capacity + the hydraulic device absorption outdoor unit heat quantity.

[0049] In the embodiment, the hydraulic device data of the heat recovery multi-split air conditioner is acquired, and the hydraulic device absorption outdoor unit heat quantity is determined based on the hydraulic device data. Further, the outdoor unit data and the indoor unit data of the heat recovery multi-split air conditioner are acquired, and the condenser heating capacity and the evaporator cooling capacity are determined based on the outdoor unit data, the indoor unit data, and the hydraulic device data. Furthermore, the heating indoor unit heating capacity and the cooling indoor unit cooling capacity are determined based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity, and the operational capacity of the heat recovery multi-split air conditioner is determined based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity. Compared with an existing method of only detecting overall energy consumption of the multi-split air conditioner, in the embodiment, it is possible to determine the heating indoor unit heating capacity and the cooling indoor unit cooling capacity based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity, and determine the operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity. Therefore, a defect in the cooling capacity and the heating capacity generated by the heat recovery multi-split air conditioner can be detected. Accordingly, the operational capacity of the heat recovery multi-split air conditioner can be detected.

[0050] Reference can be made to FIG. 4. FIG. 4 is a flowchart illustrating another embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure. This embodiment of the multi-split air conditioner operational capacity detection method of the present disclosure is provided based on the embodiment illustrated in FIG. 2.

[0051] In the embodiment, the operation at block S30 includes operations at blocks S301 to S304.

[0052] At block S301, a condenser average inlet enthalpy, a condenser average outlet enthalpy, an evaporator average outlet enthalpy, and an evaporator inlet enthalpy are determined based on the outdoor unit data, the indoor unit data, and the hydraulic device data.

[0053] It should be understood that determining the condenser average inlet enthalpy, the condenser average outlet enthalpy, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy based on the outdoor unit data, the indoor unit data, and the hydraulic device data may include: determining the condenser average inlet enthalpy, the condenser average outlet enthalpy, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy through a predetermined enthalpy model based on the outdoor unit data, the indoor unit data, and the hydraulic device data. The predetermined enthalpy model may be preset by the manufacturer of the heat recovery multi-split air conditioner, and the present disclosure is not limited to this embodiment.

[0054] In the embodiment, in order to improve accuracy of the enthalpy, the operation at block S301 includes: extracting a compressor exhaust pressure, a compressor return gas pressure, an external heat exchanger inlet temperature, and an external heat exchanger outlet temperature of an outdoor unit from the outdoor unit data; extracting a heat exchanger inlet temperature of a heating indoor unit, an outlet temperature of the heating indoor unit, and an outlet temperature of a cooling indoor unit from the indoor unit data; extracting a heat exchanger inlet temperature and a heat exchanger outlet temperature of a hydraulic device from the hydraulic device data; determining the condenser average inlet enthalpy based on the heat exchanger inlet temperature of the hydraulic device, the heat exchanger inlet temperature of the heating indoor unit, the external heat exchanger inlet temperature, and the compressor exhaust pressure; determining the condenser average outlet enthalpy based on the heat exchanger outlet temperature of the hydraulic device, the outlet temperature of the heating indoor unit, and the external heat exchanger outlet temperature, and determining the condenser average outlet enthalpy as the evaporator inlet enthalpy; and determining the evaporator average outlet enthalpy based on the cooling indoor unit outlet temperature and the compressor return gas pressure.

[0055] It should be noted that the compressor exhaust pressure is a system high pressure and the compressor return gas pressure is a system low pressure, and the embodiment is not limited in this regard.

[0056] It should be understood that determining the condenser average inlet enthalpy based on the heat exchanger inlet temperature of the hydraulic device, the heat exchanger inlet temperature of the heating indoor unit, the external heat exchanger inlet temperature, and the compressor exhaust pressure may include: determining inlet enthalpy of each member of a condenser based on the heat exchanger inlet temperature of the hydraulic device, the heat exchanger inlet temperature of the heating indoor unit, the external heat exchanger inlet temperature, and the compressor exhaust pressure, and determining the condenser average inlet enthalpy based on the inlet enthalpy of each member of the condenser.

[0057] It should be understood that determining the condenser average outlet enthalpy based on the heat exchanger outlet temperature of the hydraulic device, the outlet temperature of the heating indoor unit, and the external heat exchanger outlet temperature may mean: determining outlet enthalpy of each member of the condenser based on the heat exchanger outlet temperature of the hydraulic device, the outlet temperature of the heating indoor unit, and the external heat exchanger outlet temperature, and determining the condenser average outlet enthalpy based on the outlet enthalpy of each member of the condenser.

[0058] At S302, a compressor circulation flow rate of an outdoor unit is extracted from the outdoor unit data.

[0059] It should be understood that extracting the compressor circulation flow rate of the outdoor unit from the outdoor unit data may include: performing an identifier extraction on the outdoor unit data to obtain a data identifier, and determining the compressor circulation flow rate of the outdoor unit based on the data identifier. The data identifier may be an identity identifier set for the outdoor unit data when the outdoor unit data is stored, and the embodiment is not limited in this regard.

[0060] At S303, the condenser heating capacity is determined based on the compressor circulation flow rate, the condenser average inlet enthalpy, and the condenser average outlet enthalpy.

[0061] It should be noted that the condenser heating capacity may be used to represent the total condensing capacity. When the heat recovery multi-split air conditioner is in the main cooling mode, the total condensing capacity includes the heat exchanger capacity of the outdoor unit, the heating indoor unit capacity, and the hydraulic device absorption outdoor unit heat quantity. When the heat recovery multi-split air conditioner is in the main heating mode, the total condensing capacity includes the heating indoor unit capacity and the hydraulic device absorption outdoor unit heat quantity. It should be understood that determining the condenser heating capacity based on the compressor circulation flow rate, the condenser average inlet enthalpy, and the condenser average outlet enthalpy may be that the total condensing capacity=the compressor circulation flow rate*(the condenser average inlet enthalpy-the condenser average outlet enthalpy).

[0062] At S304, the evaporator cooling capacity is determined based on the compressor circulation flow rate, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy.

[0063] It should be noted that the evaporator cooling capacity may be used to represent the total evaporation capacity. When the heat recovery multi-split air conditioner is in the main cooling mode, the total evaporation capacity includes the cooling indoor unit total capacity. When the heat recovery multi-split air conditioner is in the main heating mode, the total evaporation capacity includes the cooling indoor unit total capacity and the heat exchanger capacity of the outdoor unit.

[0064] It should be understood that determining the evaporator cooling capacity based on the compressor circulation flow rate, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy may be that the total evaporation capacity=the compressor circulation flow rate*(the evaporator average outlet enthalpy-the evaporator inlet enthalpy).

[0065] In the embodiment, the condenser average inlet enthalpy, the condenser average outlet enthalpy, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy are determined based on the outdoor unit data, the indoor unit data, and the hydraulic device data. Further, the compressor circulation flow rate of the outdoor unit is extracted from the outdoor unit data. Furthermore, the condenser heating capacity is determined based on the compressor circulation flow rate, the condenser average inlet enthalpy, and the condenser average outlet enthalpy, and the evaporator cooling capacity is determined based on the compressor circulation flow rate, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy. Therefore, accuracy of the condenser heating capacity and the evaporator cooling capacity can be increased.

[0066] In the embodiment, the operation at block S40 includes operations at blocks S401 to S404.

[0067] At block S401, a current operation mode of the heat recovery multi-split air conditioner is acquired.

[0068] It should be noted that an operation mode of the heat recovery multi-split air conditioner may include a predetermined only hydraulic device ON mode, the predetermined main cooling mode, and a predetermined main heating mode, and the embodiment is not limited in this regard. The predetermined only hydraulic device ON mode may be an operation mode in which the hydraulic device of the heat recovery multi-split air conditioner is turned on and the indoor unit is not turned on. The predetermined main cooling mode may be an operation mode in which the indoor unit and the high-temperature hydraulic device of the heat recovery multi-split air conditioner are turned on simultaneously and an outdoor unit heat exchanger is the condenser. The predetermined main heating mode may be an operation mode in which the indoor unit and the high-temperature hydraulic device of the heat recovery multi-split air conditioner are turned on simultaneously and the outdoor unit heat exchanger is an evaporator.

[0069] At block S402, a heating indoor unit capacity ratio and a cooling indoor unit capacity ratio are determined based on the current operation mode.

[0070] It should be understood that determining the heating indoor unit capacity ratio and the cooling indoor unit capacity ratio based on the current operation mode may mean: determining a first predetermined value as the cooling indoor unit capacity ratio when the current operation mode is a predetermined main cooling mode; extracting an indoor unit heat transfer coefficient, an indoor unit heat transfer area, and an indoor unit inside ambient temperature from the indoor unit data; extracting an outdoor unit heat transfer coefficient, an outdoor unit heat transfer area, and an outdoor unit ambient temperature from the outdoor unit data; and acquiring a high-pressure saturation temperature of the heat recovery multi-split air conditioner, and determining the heating indoor unit capacity ratio based on the indoor unit heat transfer coefficient, the indoor unit heat transfer area, the high-pressure saturation temperature, the indoor unit inside ambient temperature, the outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature.

[0071] Or, it should be understood that determining the heating indoor unit capacity ratio and the cooling indoor unit capacity ratio based on the current operation mode may mean: determining a second predetermined value as the heating indoor unit capacity ratio when the current operation mode is a predetermined main heating mode; extracting an indoor unit valve flow coefficient from the indoor unit data; extracting an outdoor unit valve flow coefficient from the outdoor unit data; and determining the cooling indoor unit capacity ratio based on the indoor unit valve flow coefficient and the outdoor unit valve flow coefficient.

[0072] At block S403, the heating indoor unit heating capacity is determined based on the heating indoor unit capacity ratio, the hydraulic device heat absorption value, and the condenser heating capacity.

[0073] It should be understood that determining the heating indoor unit heating capacity based on the heating indoor unit capacity ratio, the hydraulic device heat absorption value, and the condenser heating capacity may be that the heating indoor unit heating capacity=the heating indoor unit capacity ratio*(the condenser heating capacity-the hydraulic device heat absorption value).

[0074] At block S404, the cooling indoor unit cooling capacity is determined based on the cooling indoor unit capacity ratio and the evaporator cooling capacity.

[0075] It should be understood that determining the cooling indoor unit cooling capacity based on the cooling indoor unit capacity ratio and the evaporator cooling capacity may be that the cooling indoor unit cooling capacity=the cooling indoor unit capacity ratio *the evaporator cooling capacity.

[0076] In the embodiment, the current operation mode of the heat recovery multi-split air conditioner is acquired, and the heating indoor unit capacity ratio and the cooling indoor unit capacity ratio are determined based on the current operation mode. Further, the heating indoor unit heating capacity is determined based on the heating indoor unit capacity ratio, the hydraulic device heat absorption value, and the condenser heating capacity. Furthermore, the cooling indoor unit cooling capacity is determined based on the cooling indoor unit capacity ratio and the evaporator cooling capacity. Therefore, the accurate and reliable heating indoor unit heating capacity and cooling indoor unit cooling capacity can be generated.

[0077] Reference can be made to FIG. 5. FIG. 5 is a flowchart illustrating yet another embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure. This embodiment of the multi-split air conditioner operational capacity detection method of the present disclosure is provided based on the embodiment illustrated in FIG. 4.

[0078] In the embodiment, the operation at block S402 includes operations at S4021 to S4024.

[0079] At block S4021, a first predetermined value is determined as the cooling indoor unit capacity ratio when the current operation mode is a predetermined main cooling mode.

[0080] It should be noted that the first predetermined value may be preset by the manufacturer of the heat recovery multi-split air conditioner. In the embodiment, as an example, the first predetermined value is 1.

[0081] In addition, for ease of understanding, description is made with reference to FIG. 6. FIG. 6 is a schematic diagram of a heat recovery multi-split air conditioner system operating in a main cooling mode. When the current operation mode is the main cooling mode, the refrigerant is compressed into a high-temperature and high-pressure refrigerant in the compressor. A part of the refrigerant enters the external heat exchanger for condensation, while the rest of the refrigerant enters the refrigerant switching device 2 and the hydraulic device 4 through the high-pressure gas pipe stop valve. In the of the refrigerant switching device 2, the heating solenoid valve 21 corresponding to the heating indoor unit is opened, while the cooling solenoid valve 22 corresponding to the heating indoor unit is closed. The refrigerant of the outdoor unit enters the heating indoor unit for condensation, and the refrigerant entering the hydraulic device releases heat to be condensed in the hydraulic device. Then the two parts of the refrigerant converge in a liquid pipe. The converged liquid refrigerant enters the cooling indoor unit for evaporation via the refrigerant switching device. Meanwhile, in refrigerant switching device 2, the cooling solenoid valve 24 corresponding to the cooling indoor unit is opened, while the heating solenoid valve 23 corresponding to the cooling indoor unit is closed. A refrigerant circulation of the outdoor unit is completed through allowing the liquid refrigerant to be throttled and evaporated into a gaseous refrigerant in the indoor cooling unit, return to a low-pressure gas pipe through the cooling solenoid valve, and then return, via the low-pressure gas pipe stop valve 110, to an outdoor unit compressor for suction. Meanwhile, the refrigerant R134a in the hydraulic device absorbs heat of the refrigerant of the outdoor unit and is evaporated into a gaseous refrigerant. Then, refrigerant R134a flows back to the hydraulic device compressor 41 and is compressed into a high-temperature and high-pressure gas in the hydraulic device compressor. Thereafter, the refrigerant R134a enters the condenser 42 to release heat to the water and is condensed into a liquid, and then flows back to the hydraulic device evaporator through the first hydraulic device electronic expansion valve 43 to exchange heat with the high-pressure refrigerant of the outdoor unit. As a result, a refrigerant R134a circulation in the hydraulic device is completed. In FIG. 6, a dotted line indicates that the valve is closed.

[0082] In addition, for ease of understanding, description is made with reference to FIG. 7. FIG. 7 is a schematic diagram of a refrigerant flow when a heat recovery multi-split air conditioner system operates in a main cooling mode. In FIG. 7, a hydraulic device heat exchanger, a heating indoor unit heat exchanger, and an external heat exchanger are connected in parallel as condensers of the system. Also, the heat exchanger is connected in series with an electronic expansion valve corresponding to the heat exchanger. Each electronic expansion valve controls a refrigerant flow in each condenser. A refrigeration compression cycle of main refrigeration is completed through allowing the refrigerant flows to be condensed into liquid refrigerants in corresponding condensers, converge in the liquid pipe, be throttled and depressurized by a cooling indoor unit electronic expansion valve, be evaporated and absorb heat in the indoor cooling unit, and then return to the compressor.

[0083] At block S4022, an indoor unit heat transfer coefficient, an indoor unit heat transfer area, and an indoor unit inside ambient temperature are extracted from the indoor unit data.

[0084] It should be understood that an extraction on the indoor unit data may include: performing the extraction on the indoor unit data based on an indoor unit data identifier. The indoor unit data identifier may be a data identity identifier set when the indoor unit data is stored. The embodiment is not limited in this regard.

[0085] At block S4023, an outdoor unit heat transfer coefficient, an outdoor unit heat transfer area, and an outdoor unit ambient temperature are extracted from the outdoor unit data.

[0086] It should be understood that an extraction on the outdoor unit data may include: extracting the outdoor unit data based on an outdoor unit data identifier. The outdoor unit data identifier may be a data identity identifier set when the outdoor unit data is stored. The embodiment is not limited in this regard.

[0087] At block S4024, a high-pressure saturation temperature of the heat recovery multi-split air conditioner is acquired, and the heating indoor unit capacity ratio is determined based on the indoor unit heat transfer coefficient, the indoor unit heat transfer area, the high-pressure saturation temperature, the indoor unit inside ambient temperature, the outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature.

[0088] It should be understood that determining the heating indoor unit capacity ratio based on the indoor unit heat transfer coefficient, the indoor unit heat transfer area, the high-pressure saturation temperature, the indoor unit inside ambient temperature, the outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature may include: determining the heating indoor unit capacity ratio through a predetermined heating indoor unit capacity model based on the indoor unit heat transfer coefficient, the indoor unit heat transfer area, the high-pressure saturation temperature, the indoor unit inside ambient temperature, the outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature.

[0089] The predetermined heating indoor unit capacity model may satisfy:

where R_heating represents the heating indoor unit capacity ratio, K_i represents a heat transfer coefficient of an i -th heating indoor unit, A_i represents a heat transfer area of the i -th heating indoor unit, T_1i represents the high-pressure saturation temperature, K represents the outdoor unit heat transfer coefficient, A represents the outdoor unit heat transfer area, and T₄ represents the outdoor unit ambient temperature.

[0090] In the embodiment, the first predetermined value is determined as the cooling indoor unit capacity ratio when the current operation mode is the predetermined main cooling mode. Further, the indoor unit heat transfer coefficient, the indoor unit heat transfer area, and the indoor unit inside ambient temperature are extracted from the indoor unit data. The outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature are extracted from the outdoor unit data. Furthermore, the high-pressure saturation temperature of the heat recovery multi-split air conditioner is acquired, and the heating indoor unit capacity ratio is determined based on the indoor unit heat transfer coefficient, the indoor unit heat transfer area, the high-pressure saturation temperature, the indoor unit inside ambient temperature, the outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature. Therefore, when the current operation mode is the predetermined main cooling mode, the cooling indoor unit capacity ratio and the heating indoor unit capacity ratio can be calculated accurately.

[0091] Reference can be made to FIG. 8. FIG. 8 is a flowchart illustrating still yet another embodiment of a multi-split air conditioner operational capacity detection method of the present disclosure. This embodiment of the multi-split air conditioner operational capacity detection method of the present disclosure is provided based on the embodiment illustrated in FIG. 4.

[0092] In the embodiment, the operation at block S402 includes operations at blocks S4021' to S4023'.

[0093] At block S4021', a second predetermined value is determined as the heating indoor unit capacity ratio when the current operation mode is a predetermined main heating mode.

[0094] It should be noted that the second predetermined value may be preset by the manufacturer of the heat recovery multi-split air conditioner. In the embodiment, as an example, the second predetermined value is 1.

[0095] In addition, for ease of understanding, description is made with reference to FIG. 9. FIG. 9 is a schematic diagram of a heat recovery multi-split air conditioner system operating in a main heating mode. When the current operation mode is the main heating mode, the four-way valve 13 is switched, and the external heat exchanger 14 is switched to the evaporator. The refrigerant of the outdoor unit is compressed into the high-temperature and high-pressure refrigerant in the compressor, enters the high-pressure gas pipe through the four-way valve 12, and then enters the high-temperature hydraulic device and the refrigerant switching device 2 through the high-pressure gas pipe stop valve 19. In the refrigerant switching device 2, the refrigerant switching device heating solenoid valve corresponding to the heating indoor unit is opened, while the refrigerant switching device cooling solenoid valve corresponding to the heating indoor unit is closed. The high-temperature and high-pressure refrigerant enters the heating indoor unit for condensation. The condensed liquid refrigerant returns to the refrigerant switching device. The refrigerant entering the high-temperature hydraulic device is condensed into a liquid refrigerant in the hydraulic device and converges with the refrigerant condensed by the heating indoor unit. The converged liquid refrigerant is then divided into two parts. One part of the converged liquid refrigerant enters the external heat exchanger for evaporation, and the other part of the converged liquid refrigerant enters the cooling solenoid valve corresponding to the refrigerant switching device, enters the cooling indoor unit for evaporation, converges with the refrigerant evaporated by the outdoor unit, and then returns to the compressor for compression. In this way, a refrigerant cycle in the main heating mode is completed. An operation state in the high-temperature hydraulic device is the same as that in the main cooling mode.

[0096] In addition, for ease of understanding, description is made with reference to FIG. 10. FIG. 10 is a schematic diagram of a refrigerant flow when a heat recovery multi-split air conditioner system operates in a main heating mode. The only difference between the main heating mode and the main cooling mode is that in the main heating mode, the external heat exchanger serves as an evaporator in the system.

[0097] At block S4022', an indoor unit valve flow coefficient is extracted from the indoor unit data.

[0098] It should be understood that an extraction on the indoor unit data may include: performing the extraction on the indoor unit data based on an indoor unit data identifier. The indoor unit data identifier may be a data identity identifier set when the indoor unit data is stored. The embodiment is not limited in this regard.

[0099] At block S4023', an outdoor unit valve flow coefficient is extracted from the outdoor unit data.

[0100] It should be understood that an extraction on the outdoor unit data may include: performing the extraction on the outdoor unit data based on an outdoor unit data identifier. The outdoor unit data identifier may be a data identity identifier set when the outdoor unit data is stored. The embodiment is not limited in this regard.

[0101] At block S4024', the cooling indoor unit capacity ratio is determined based on the indoor unit valve flow coefficient and the outdoor unit valve flow coefficient.

[0102] It should be understood that determining the cooling indoor unit capacity ratio based on the indoor unit valve flow coefficient and the outdoor unit valve flow coefficient may include: determining the cooling indoor unit capacity ratio through a predetermined cooling indoor unit capacity model based on the indoor unit valve flow coefficient and the outdoor unit valve flow coefficient.

[0103] The predetermined cooling indoor unit capacity model may satisfy:

where R_cooling represents the cooling indoor unit capacity ratio, cvk represents the indoor unit valve flow coefficient, and cv represents the outdoor unit valve flow coefficient.

[0104] In the embodiment, the second predetermined value is determined as the heating indoor unit capacity ratio when the current operation mode is the predetermined main heating mode. Further, the indoor unit valve flow coefficient is extracted from the indoor unit data, and the outdoor unit valve flow coefficient is extracted from the outdoor unit data. Furthermore, the cooling indoor unit capacity ratio is determined based on the indoor unit valve flow coefficient and the outdoor unit valve flow coefficient. Therefore, when the current operation mode is the predetermined main heating mode, the cooling indoor unit capacity ratio and the heating indoor unit capacity ratio can be calculated accurately.

[0105] In addition, embodiments of the present disclosure further provide a storage medium. The storage medium has a multi-split air conditioner operational capacity detection program stored thereon. The multi-split air conditioner operational capacity detection program, when executed by a processor, implements the multi-split air conditioner operational capacity detection method as described above.

[0106] In addition, as illustrated in FIG. 11, embodiments of the present disclosure further provide a multi-split air conditioner operational capacity detection apparatus. The multi-split air conditioner operational capacity detection apparatus includes a determination module 10, an acquiring module 20, and a detection module 30.

[0107] The determination module 10 is configured to acquire hydraulic device data of a heat recovery multi-split air conditioner and determine hydraulic device absorption outdoor unit heat quantity based on the hydraulic device data.

[0108] The acquiring module 20 is configured to acquire outdoor unit data and indoor unit data of the heat recovery multi-split air conditioner.

[0109] The determination module 10 is further configured to determine a condenser heating capacity and an evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data.

[0110] The determination module 10 is further configured to determine a heating indoor unit heating capacity and a cooling indoor unit cooling capacity based on a hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity.

[0111] The detection module 30 is configured to determine an operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity.

[0112] In the embodiment, the hydraulic device data of the heat recovery multi-split air conditioner is acquired, and the hydraulic device absorption outdoor unit heat quantity is determined based on the hydraulic device data. Further, the outdoor unit data and the indoor unit data of the heat recovery multi-split air conditioner are acquired, and the condenser heating capacity and the evaporator cooling capacity are determined based on the outdoor unit data, the indoor unit data, and the hydraulic device data. Furthermore, the heating indoor unit heating capacity and the cooling indoor unit cooling capacity are determined based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity, and the operational capacity of the heat recovery multi-split air conditioner is determined based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity. Compared with the existing method of only detecting the overall energy consumption of the multi-split air conditioner, in the embodiment, it is possible to determine the heating indoor unit heating capacity and the cooling indoor unit cooling capacity based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity, and determine the operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity. Therefore, the defect in the cooling capacity and the heating capacity generated by the heat recovery multi-split air conditioner can be detected. Accordingly, the operational capacity of the heat recovery multi-split air conditioner can be detected.

[0113] Reference of other embodiments or exemplary implementations of the multi-split air conditioner operational capacity detection apparatus of the present disclosure can be made to the above method embodiments, and the description thereof in detail will be omitted herein.

[0114] It should be noted that in the present disclosure, terms "include", "have", and any variations thereof are intended to cover non-exclusive inclusions, such that a process, method, product, or system that includes a series of elements is not necessarily limited to those clearly listed elements, but may also include other elements that are not clearly listed or are inherent to the process, method, product, or system. Without further limitation, an element defined by the phrase "including a ..." does not preclude the presence of additional identical elements in the process, method, product, or system that includes the element.

[0115] The above sequence numbers of the embodiments of the present disclosure are for description only, and do not represent superiority or inferiority of the embodiments. In a unit claim listing a number of devices, several of these devices may be specifically embodied by a same hardware item. The use of words first, second, third, etc., does not indicate any sequence. The words can be interpreted as names.

[0116] From the above description of the implementations, it will be clear to those skilled in the art that the method of the above embodiments can be implemented with the aid of software and a necessary common hardware platform or can be implemented through hardware. In many cases, the former one is a better implementation. Based on this understanding, all or part of the technical solutions according to the embodiments of the present disclosure, or the part thereof that contributes to the related art, can be embodied in the form of a software product. The computer software product may be stored in a storage medium (such as a Read Only Memory (ROM)/Random Access Memory (RAM), a disk, and an optical disk) and contain instructions to enable a terminal device (which may be a mobile phone, a computer, a server, a multi-split air conditioner, a network device, etc.) to perform the method described in each of the embodiments of the present disclosure.

[0117] Although some embodiments of the present disclosure are described above, the scope of the present disclosure is not limited to the embodiments. Any equivalent structure or equivalent process transformation made using the contents of the specification and the accompanying drawings, or any direct or indirect application of the contents of the specification and the accompanying drawings in other related fields, shall equally fall within the scope of the present disclosure.

Claims

1. A multi-split air conditioner operational capacity detection method, comprising: acquiring hydraulic device data of a heat recovery multi-split air conditioner and determining hydraulic device absorption outdoor unit heat quantity based on the hydraulic device data; acquiring outdoor unit data and indoor unit data of the heat recovery multi-split air conditioner; determining a condenser heating capacity and an evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data; determining a heating indoor unit heating capacity and a cooling indoor unit cooling capacity based on a hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity; and determining an operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity.

2. The multi-split air conditioner operational capacity detection method according to claim 1, wherein said determining the heating indoor unit heating capacity and the cooling indoor unit cooling capacity based on the hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity comprises: acquiring a current operation mode of the heat recovery multi-split air conditioner; determining a heating indoor unit capacity ratio and a cooling indoor unit capacity ratio based on the current operation mode; determining the heating indoor unit heating capacity based on the heating indoor unit capacity ratio, the hydraulic device heat absorption value, and the condenser heating capacity; and determining the cooling indoor unit cooling capacity based on the cooling indoor unit capacity ratio and the evaporator cooling capacity.

3. The multi-split air conditioner operational capacity detection method according to claim 2, wherein said determining the heating indoor unit capacity ratio and the cooling indoor unit capacity ratio based on the current operation mode comprises: determining a first predetermined value as the cooling indoor unit capacity ratio when the current operation mode is a predetermined main cooling mode; extracting an indoor unit heat transfer coefficient, an indoor unit heat transfer area, and an indoor unit inside ambient temperature from the indoor unit data; extracting an outdoor unit heat transfer coefficient, an outdoor unit heat transfer area, and an outdoor unit ambient temperature from the outdoor unit data; and acquiring a high-pressure saturation temperature of the heat recovery multi-split air conditioner; and determining the heating indoor unit capacity ratio based on the indoor unit heat transfer coefficient, the indoor unit heat transfer area, the high-pressure saturation temperature, the indoor unit inside ambient temperature, the outdoor unit heat transfer coefficient, the outdoor unit heat transfer area, and the outdoor unit ambient temperature.

4. The multi-split air conditioner operational capacity detection method according to claim 2, wherein said determining the heating indoor unit capacity ratio and the cooling indoor unit capacity ratio based on the current operation mode comprises: determining a second predetermined value as the heating indoor unit capacity ratio when the current operation mode is a predetermined main heating mode; extracting an indoor unit valve flow coefficient from the indoor unit data; extracting an outdoor unit valve flow coefficient from the outdoor unit data; and determining the cooling indoor unit capacity ratio based on the indoor unit valve flow coefficient and the outdoor unit valve flow coefficient.

5. The multi-split air conditioner operational capacity detection method according to any one of claims 1 to 4, wherein said acquiring the hydraulic device data of the heat recovery multi-split air conditioner and determining the hydraulic device absorption outdoor unit heat quantity based on the hydraulic device data comprises: acquiring the hydraulic device data of the heat recovery multi-split air conditioner and determining a compressor power, an exhaust pressure, a condenser inlet temperature, a condenser outlet temperature, and a compressor circulation flow rate of a hydraulic device based on the hydraulic device data; determining a condenser inlet-outlet enthalpy difference based on the exhaust pressure, the condenser inlet temperature, and the condenser outlet temperature; determining a hydraulic device hot water production capacity based on the compressor circulation flow rate of the hydraulic device and the condenser inlet-outlet enthalpy difference; and determining the hydraulic device absorption outdoor unit heat quantity based on the hydraulic device hot water production capacity and the compressor power.

6. The multi-split air conditioner operational capacity detection method according to any one of claims 1 to 4, wherein said determining the condenser heating capacity and the evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data comprises: determining a condenser average inlet enthalpy, a condenser average outlet enthalpy, an evaporator average outlet enthalpy, and an evaporator inlet enthalpy based on the outdoor unit data, the indoor unit data, and the hydraulic device data; extracting a compressor circulation flow rate of an outdoor unit from the outdoor unit data; determining the condenser heating capacity based on the compressor circulation flow rate, the condenser average inlet enthalpy, and the condenser average outlet enthalpy; and determining the evaporator cooling capacity based on the compressor circulation flow rate, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy.

7. The multi-split air conditioner operational capacity detection method according to claim 6, wherein said determining the condenser average inlet enthalpy, the condenser average outlet enthalpy, the evaporator average outlet enthalpy, and the evaporator inlet enthalpy based on the outdoor unit data, the indoor unit data, and the hydraulic device data comprises: extracting a compressor return gas pressure, an external heat exchanger inlet temperature, an external heat exchanger outlet temperature, and a compressor exhaust pressure of the outdoor unit from the outdoor unit data; extracting a heat exchanger inlet temperature of a heating indoor unit, an outlet temperature of the heating indoor unit, and an outlet temperature of a cooling indoor unit from the indoor unit data; extracting a heat exchanger inlet temperature and a heat exchanger outlet temperature of a hydraulic device from the hydraulic device data; determining the condenser average inlet enthalpy based on the heat exchanger inlet temperature of the hydraulic device, the heat exchanger inlet temperature of the heating indoor unit, the external heat exchanger inlet temperature, and the compressor exhaust pressure; determining the condenser average outlet enthalpy based on the heat exchanger outlet temperature of the hydraulic device, the outlet temperature of the heating indoor unit, and the external heat exchanger outlet temperature, and determining the condenser average outlet enthalpy as the evaporator inlet enthalpy; and determining the evaporator average outlet enthalpy based on the cooling indoor unit outlet temperature and the compressor return gas pressure.

8. A multi-split air conditioner, comprising: a memory; a processor; and a multi-split air conditioner operational capacity detection program stored on the memory and executable on the processor, wherein the multi-split air conditioner operational capacity detection program, when executed by the processor, implements the multi-split air conditioner operational capacity detection method according to any one of claims 1 to 7.

9. A storage medium, having a multi-split air conditioner operational capacity detection program stored thereon, wherein the multi-split air conditioner operational capacity detection program, when executed by a processor, implements the multi-split air conditioner operational capacity detection method according to any one of claims 1 to 7.

10. A multi-split air conditioner operational capacity detection apparatus, comprising a determination module, an acquiring module, and a detection module, wherein: the determination module is configured to acquire hydraulic device data of a heat recovery multi-split air conditioner and determine hydraulic device absorption outdoor unit heat quantity based on the hydraulic device data; the acquiring module is configured to acquire outdoor unit data and indoor unit data of the heat recovery multi-split air conditioner; the determination module is further configured to determine a condenser heating capacity and an evaporator cooling capacity based on the outdoor unit data, the indoor unit data, and the hydraulic device data; the determination module is further configured to determine a heating indoor unit heating capacity and a cooling indoor unit cooling capacity based on a hydraulic device heat absorption value, the condenser heating capacity, and the evaporator cooling capacity; and the detection module is configured to determine an operational capacity of the heat recovery multi-split air conditioner based on the heating indoor unit heating capacity, the cooling indoor unit cooling capacity, and the hydraulic device absorption outdoor unit heat quantity.

Drawing