Method and device for detecting subcooling valve failure, electronic device, and storage medium

Abstract

The present application relates to the technical field of multi-split air conditioners, and discloses a method for detecting a subcooling valve failure, including: obtaining the current operation mode; when the current operation mode is a cooling operation mode, accumulating the cooling operation time; when the cooling operation time is equal to a first preset time, obtaining the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature; determining whether the subcooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. In this way, the subcooling valve can be automatically detected whether it is faulty by the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature, and there is no need to manually determine whether the subcooling valve is faulty, thereby improving the efficiency of determining whether the subcooling valve is faulty. The present application also discloses a device, an electronic device, and a storage medium for detecting a subcooling valve failure.

Description

Technical Field

[0001] The present application relates to the technical field of multi-split air conditioners, for example, to a method and device, electronic equipment, and storage medium for detecting a supercooling valve failure. Background Art

[0002] With the emergence of two-stage subcooling devices, more and more multi-split air conditioners are equipped with two-stage subcooling devices to speed up the indoor temperature adjustment speed. The two-stage subcooling device is usually equipped with a subcooling valve. If the subcooling valve fails during the operation of the multi-split air conditioner, the cooling effect of the multi-split air conditioner will be poor. Therefore, it is necessary to detect whether the subcooling valve is faulty during the operation of the air conditioner.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] In the related art, whether the supercooling valve is faulty is determined manually, which is inefficient. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a method and device, an electronic device, and a storage medium for detecting a supercooling valve failure, so as to improve the efficiency of determining whether a supercooling valve is faulty.

[0007] In some embodiments, the method for detecting a subcooling valve failure comprises: obtaining a current operating mode; when the current operating mode is a refrigeration operating mode, accumulating refrigeration operating time; when the refrigeration operating time is equal to a first preset time, obtaining a refrigerant radiator inlet temperature and a first plate heat exchanger outlet temperature; and determining whether the subcooling valve is faulty based on the refrigerant radiator inlet temperature and the first plate heat exchanger outlet temperature.

[0008] In some embodiments, the device for detecting a subcooling valve failure comprises: a first acquisition module configured to acquire a current operating mode; a duration accumulation module configured to accumulate a refrigeration operation duration when the current operating mode is a refrigeration operation mode; a second acquisition module configured to acquire a refrigerant radiator inlet temperature and a first plate heat exchanger outlet temperature when the refrigeration operation duration is equal to a first preset duration; and a fault determination module configured to determine whether the subcooling valve is faulty based on the refrigerant radiator inlet temperature and the first plate heat exchanger outlet temperature.

[0009] In some embodiments, the electronic device includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for detecting a subcooling valve fault condition when running the program instructions.

[0010] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the above-mentioned method for detecting a subcooling valve failure condition is executed.

[0011] The method and device, electronic device, and storage medium for detecting a subcooling valve failure provided by the embodiments of the present disclosure can achieve the following technical effects: by obtaining the current operating mode. When the current operating mode is the cooling operating mode, the cooling operating time is accumulated. When the cooling operating time is equal to the first preset time, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature are obtained. Determine whether the subcooling valve is faulty based on the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. In this way, since there is a regularity in the changes of the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature when the air conditioner is in the cooling operation process and the subcooling valve is not faulty, the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature can automatically detect whether the subcooling valve is faulty, and there is no need to manually determine whether the subcooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0012] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0014] Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0015] Figure 2 is a structural schematic diagram of another air conditioner provided by an embodiment of the present disclosure;

[0016] Figure 3 is a schematic diagram of a first method for detecting a subcooling valve failure provided by an embodiment of the present disclosure;

[0017] Figure 4 is a schematic diagram of a second method for detecting a subcooling valve failure provided by an embodiment of the present disclosure;

[0018] Figure 5 is a schematic diagram of a device for detecting a supercooling valve failure condition provided by an embodiment of the present disclosure;

[0019] Figure 6 It is a schematic diagram of an electronic device provided by an embodiment of the present disclosure.

[0020] Reference numerals:

[0021] 1: First indoor unit; 2: First evaporator; 3: First filter; 4: First PMV valve; 5: Second filter; 6: First capacitor; 7: Second capacitor; 8: Gas pipe stop valve; 9: Liquid pipe stop valve; 10: Four-way valve; 11: Condenser; 12: First capillary tube; 13: Gas separator; 14: Plate heat exchanger; 15: Oil separator; 16: Third filter; 17: Solenoid valve; 18: Compressor; 19: Second capillary tube; 20: Fifth filter; 21: Main electronic expansion valve; 22: Refrigerant radiator; 23: Subcooling valve; 24: Sixth filter; 25: Heater; 26: Fan; 27: High pressure switch; 28: Low pressure switch; 29: Second temperature sensor; 30: Fourth temperature sensor temperature sensor; 31: low pressure sensor; 32: third temperature sensor; 33: first temperature sensor; 34: fourth filter; 35: second indoor unit; 36: third indoor unit; 37: fourth indoor unit; 38: second evaporator; 39: seventh filter; 40: second PMV valve; 41: eighth filter; 42: third capacitor; 43: fourth capacitor; 44: third evaporator; 45: ninth filter; 46: third PMV valve; 47: tenth filter; 48: fifth capacitor; 49: sixth capacitor; 50: fourth evaporator; 51: eleventh filter; 52: fourth PMV valve; 53: twelfth filter; 54: seventh capacitor; 55: eighth capacitor. DETAILED DESCRIPTION

[0022] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0023] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0024] Unless otherwise stated, the term "plurality" means two or more.

[0025] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0026] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0027] The present application is applied to a multi-split air conditioner, and is used to detect whether a subcooling valve installed in a secondary subcooling device in the multi-split air conditioner is faulty. The multi-split air conditioner comprises: a primary subcooling device and a secondary subcooling device. The primary subcooling device is used to control the refrigerant to perform a primary subcooling, and the secondary subcooling device is used to control the refrigerant to perform a secondary subcooling after the primary subcooling. Optionally, the primary subcooling device comprises a condenser; the secondary subcooling device comprises a plate heat exchanger and a subcooling valve. The subcooling valve is an electronic expansion valve, which is used to control the refrigerant flow through the plate heat exchanger.

[0028] In some embodiments. Figure 1 Figure 1 is a schematic diagram of the air conditioner structure. Figure 1As shown, the first indoor unit 1 is provided with a first evaporator 2, a first filter 3, a first PMV valve 4 and a second filter 5. One end of the first evaporator 2 is connected to one end of the gas pipe stop valve 8 through the first capacitor 6, and the other end of the first evaporator 2 is connected to the first filter 3. The other end of the first filter 3 is connected to one end of the first PMV valve 4, and the other end of the first PMV valve 4 is connected to one end of the second filter 5. The other end of the second filter 5 is connected to one end of the liquid pipe stop valve 9 through the second capacitor 7. The e port of the four-way valve 10 is connected to the other end of the gas pipe stop valve 8, the c port of the four-way valve is connected to one end of the condenser 11, the s port of the four-way valve is connected to one end of the first capillary tube 12, one end of the gas separator 13 and the first port of the plate heat exchanger 14, and the d port of the four-way valve is connected to the first port of the oil separator 15 and one end of the third filter 16. The other end of the third filter 16 is connected to one end of the solenoid valve 17, and the other end of the solenoid valve 17 is connected to the other end of the first capillary tube 12. The second port of the oil separator 15 is connected to one end of the compressor 18, and the other end of the compressor 18 is connected to the other end of the gas separator 13 and one end of the second capillary 19. The third port of the oil separator 15 is connected to one end of the fourth filter 34, and the other end of the fourth filter 34 is connected to the other end of the second capillary 19. The other end of the condenser 11 is connected to one end of the fifth filter 20, and the other end of the fifth filter 20 is connected to one end of the main electronic expansion valve 21, and the other end of the main electronic expansion valve 21 is connected to one end of the refrigerant radiator 22, and the other end of the refrigerant radiator 22 is connected to one end of the supercooling valve 23 and the second port of the plate heat exchanger 14. The other end of the supercooling valve 23 is connected to the third port of the plate heat exchanger 14. The fourth port of the plate heat exchanger 14 is connected to one end of the sixth filter 24. The other end of the sixth filter 24 is connected to the other end of the liquid pipe stop valve 9. Among them, the condenser serves as a primary supercooling device, and the plate heat exchanger and the supercooling valve constitute a secondary supercooling device. The air conditioner is also provided with a heater 25 for heating. The air conditioner is also provided with a fan 26 for blowing air. Among them, a high-pressure switch 27 is provided on the connecting pipe connecting the second port of the oil separator 15 to the compressor 18. A low-pressure switch 28 is provided on the connecting pipe connecting the compressor 18 to the gas separator 13. A first temperature sensor 33 is provided on the connecting pipe between the main electronic expansion valve 21 and the refrigerant radiator 22, and the third temperature sensor is used to detect the inflow temperature of the refrigerant radiator. A second temperature sensor 29 is provided on the connecting pipe connecting the fourth port of the plate heat exchanger 14 to the sixth filter 24, and the second temperature sensor is used to detect the outflow temperature of the plate heat exchanger. A third temperature sensor 32 is provided on the connecting pipe between the condenser 11 and the fifth filter 20, and the third temperature sensor is used to detect the outflow temperature of the condenser. A fourth temperature sensor 30 is provided on the connecting pipe connecting the first evaporator 2 to the first capacitor 6, and the fourth temperature sensor is used to detect the inlet pipe temperature of the indoor unit evaporator.A low-pressure sensor 31 is provided on the connecting pipe connecting the s port of the four-way valve 10 to the gas distributor 13, and the low-pressure sensor is used to detect the pressure value of the intake pipe.

[0029] In some embodiments, Figure 2 Figure 1 is a schematic diagram of the air conditioner structure. Figure 2 As shown, the air conditioner is provided with a plurality of indoor units, for example: a first indoor unit 1, a second indoor unit 35, a third indoor unit 36, and a fourth indoor unit 37. The second indoor unit is provided with a second evaporator 38, a seventh filter 39, a second PMV valve 40, and an eighth filter 41. One end of the second evaporator 38 is connected to one end of the gas pipe stop valve 8 through a third capacitor 42, and the other end of the second evaporator 38 is connected to the seventh filter 39. The other end of the seventh filter 39 is connected to one end of the second PMV valve 40, and the other end of the second PMV valve 40 is connected to one end of the eighth filter 41. The other end of the eighth filter 41 is connected to one end of the liquid pipe stop valve 7 through a fourth capacitor 43. The third indoor unit 36 ​​is provided with a third evaporator 44, a ninth filter 45, a third PMV valve 46, and a tenth filter 47. One end of the third evaporator 44 is connected to one end of the gas pipe stop valve 8 through a fifth capacitor 48, and the other end of the third evaporator 44 is connected to the ninth filter 45. The other end of the ninth filter 45 is connected to one end of the third PMV valve 46, and the other end of the third PMV valve 46 is connected to one end of the tenth filter 47. The other end of the tenth filter 47 is connected to one end of the liquid pipe stop valve 9 through the sixth capacitor 49. The fourth indoor unit 37 is provided with a fourth evaporator 50, an eleventh filter 51, a fourth PMV valve 52 and a twelfth filter 53. One end of the fourth evaporator 50 is connected to one end of the gas pipe stop valve 8 through the seventh capacitor 54, and the other end of the fourth evaporator 50 is connected to the eleventh filter 51. The other end of the eleventh filter 51 is connected to one end of the fourth PMV valve 52, and the other end of the fourth PMV valve 52 is connected to one end of the twelfth filter 53. The other end of the twelfth filter 53 is connected to one end of the liquid pipe stop valve 9 through the eighth capacitor 55.

[0030] Combination Figure 3 As shown, the embodiment of the present disclosure provides a first method for detecting a subcooling valve failure, comprising:

[0031] Step S301: the electronic device obtains the current operating mode.

[0032] Step S302: When the current operation mode of the electronic device is the cooling operation mode, the cooling operation time is accumulated.

[0033] Step S303: When the cooling operation time of the electronic device is equal to the first preset time, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature are obtained.

[0034] Step S304: the electronic device determines whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature.

[0035] The method for detecting a subcooling valve failure provided by an embodiment of the present disclosure is adopted, by obtaining the current operation mode. When the current operation mode is the refrigeration operation mode, the refrigeration operation time is accumulated. When the refrigeration operation time is equal to the first preset time, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature are obtained. Determine whether the subcooling valve is faulty based on the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. In this way, since there is a regularity in the changes of the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature when the air conditioner is in the refrigeration operation and the subcooling valve is not faulty, therefore, the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature can automatically detect whether the subcooling valve is faulty, and there is no need to manually determine whether the subcooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0036] Optionally, determining whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature includes: determining a first temperature difference between the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. When the first temperature difference is greater than a first preset temperature difference, it is determined that the supercooling valve is not faulty. Otherwise, the supercooling valve is faulty. The first preset temperature difference, for example, is 5K, where K is a thermodynamic temperature unit. In this way, since the air conditioner is in the process of cooling operation and the supercooling valve is not faulty, the changes in the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature are regular, therefore, the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature can automatically detect whether the supercooling valve is faulty, and there is no need to manually determine whether the supercooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0037] Further, determining a first temperature difference between the refrigerant radiator inlet temperature and the first plate heat exchanger outlet temperature includes: calculating the refrigerant radiator inlet temperature minus the first plate heat exchanger outlet temperature to obtain the first temperature difference.

[0038] Optionally, determining whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature includes: obtaining the second plate heat exchanger outflow temperature when the refrigeration operation time is equal to the second preset time. Obtaining the third plate heat exchanger outflow temperature when the refrigeration operation time is equal to the third preset time. Determining whether the supercooling valve is faulty according to the second plate heat exchanger outflow temperature, the third plate heat exchanger outflow temperature, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. Wherein, the third preset time is greater than the second preset time.

[0039] In this way, since there is a regularity in the changes in the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature at different times during the cooling operation of the air conditioner, the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature can automatically detect whether the subcooling valve is faulty, and there is no need to manually judge whether the subcooling valve is faulty, which improves the efficiency of determining whether the cooling valve is faulty.

[0040] Further, determining whether the supercooling valve is faulty according to the outflow temperature of the second plate heat exchanger, the outflow temperature of the third plate heat exchanger, the inflow temperature of the refrigerant radiator, and the outflow temperature of the first plate heat exchanger includes: determining a first temperature difference between the inflow temperature of the refrigerant radiator and the outflow temperature of the first plate heat exchanger. Determining a second temperature difference between the outflow temperature of the second plate heat exchanger and the outflow temperature of the third plate heat exchanger. When the first temperature difference is greater than the first preset temperature difference and the second temperature difference is greater than the second preset temperature difference, it is determined that the supercooling valve is not faulty. Otherwise, the supercooling valve is faulty. Wherein, the second preset temperature difference is less than the first preset temperature value. The second preset temperature difference is, for example, 4K.

[0041] Further, determining a second temperature difference between the second plate heat exchanger outlet temperature and the third plate heat exchanger outlet temperature includes: calculating the second plate heat exchanger outlet temperature minus the third plate heat exchanger outlet temperature to obtain the second temperature difference.

[0042] In some embodiments, the first preset duration is less than the first preset supercooling valve opening duration, and the second preset duration is greater than the first preset supercooling valve opening duration. Usually, after the multi-split air conditioner turns on the cooling operation mode, the compressor will start first, and the supercooling valve will not be started until the compressor has been running for a period of time. The time interval between the multi-split air conditioner starting the cooling operation mode and the cold valve opening is the first preset supercooling valve opening duration. In this way, since the air conditioner is in the process of cooling operation, before the supercooling valve is opened, the refrigerant will show the characteristic of temperature reduction after flowing through the refrigerant radiator and the plate heat exchanger. After the supercooling valve is opened, the temperature of the refrigerant flowing through the plate heat exchanger will continue to decrease. Therefore, combined with the refrigerant radiator inflow temperature and the plate heat exchanger outflow temperature before and after the supercooling valve is opened, it is possible to automatically and accurately detect whether the supercooling valve is faulty, without the need for manual judgment of whether the supercooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0043] Optionally, determining whether the supercooling valve is faulty according to the inflow temperature of the refrigerant radiator and the outflow temperature of the first plate heat exchanger includes: obtaining the outflow temperature of the fourth plate heat exchanger and the outflow temperature of the condenser when the refrigeration operation time is equal to the fourth preset time; determining whether the supercooling valve is faulty according to the outflow temperature of the fourth plate heat exchanger, the outflow temperature of the condenser, the inflow temperature of the refrigerant radiator and the outflow temperature of the first plate heat exchanger. Among them, the fourth preset time is greater than the first preset time of opening of the supercooling valve. In some embodiments, the fourth preset time is equal to the second preset time. In this way, after the refrigerant flows through the primary supercooling device and the secondary supercooling device, the secondary supercooling device is used to control the refrigerant after the primary supercooling to be secondary supercooled. So that the temperature of the refrigerant after flowing through the plate heat exchanger is lower than the temperature of the refrigerant after flowing through the condenser. Therefore, according to the outflow temperature of the plate heat exchanger, the outflow temperature of the condenser and the inflow temperature of the refrigerant radiator, it is possible to automatically detect whether the supercooling valve is faulty, without the need to manually determine whether the supercooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0044] Further, determining whether the supercooling valve is faulty according to the fourth plate heat exchanger outflow temperature, the condenser outflow temperature, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature includes: determining a third temperature difference between the fourth plate heat exchanger outflow temperature and the condenser outflow temperature; determining that the supercooling valve is not faulty when the first temperature difference is greater than the first preset temperature difference and the third temperature difference is greater than the third preset temperature difference; otherwise, the supercooling valve is faulty. The third preset temperature difference is 8K.

[0045] Further, determining a third temperature difference between the fourth plate heat exchanger outlet temperature and the condenser outlet temperature includes: calculating the fourth plate heat exchanger outlet temperature minus the condenser outlet temperature to obtain the third temperature difference.

[0046] Optionally, determining whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature includes: obtaining the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature when the refrigeration operation time is equal to the fifth preset time; determining whether the supercooling valve is faulty according to the indoor unit evaporator inlet pipe temperature, the fifth plate heat exchanger outflow temperature, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. Among them, the fifth preset time is greater than the first preset supercooling valve opening time. In some embodiments, the fifth preset time is equal to the second preset time. In this way, since the air conditioner is in the process of refrigeration operation, before and after the supercooling valve is opened, the changes of the refrigerant radiator outflow temperature, the plate heat exchanger outflow temperature and the indoor unit evaporator inlet pipe temperature have different rules, therefore, the refrigerant radiator outflow temperature, the plate heat exchanger outflow temperature and the indoor unit evaporator inlet pipe temperature can be automatically detected whether the supercooling valve is faulty, and there is no need to manually judge whether the supercooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0047] Further, determining whether the supercooling valve is faulty according to the indoor unit evaporator inlet pipe temperature, the fifth plate heat exchanger outflow temperature, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature includes: determining a first temperature difference between the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. Determining a fourth temperature difference between the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature; determining that the supercooling valve is not faulty when the first temperature difference is greater than the first preset temperature difference and the fourth temperature difference is greater than the fourth preset temperature difference. The fourth preset temperature difference is 32K.

[0048] Further, determining a fourth temperature difference between the indoor unit evaporator inlet tube temperature and the fifth plate heat exchanger outlet temperature includes: calculating the fifth plate heat exchanger outlet temperature minus the indoor unit evaporator inlet tube temperature to obtain the fourth temperature difference.

[0049] In some embodiments, the electronic device obtains the current operation mode. When the current operation mode is the cooling operation mode, the cooling operation time is accumulated. When the cooling operation time is equal to the first preset time, the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature are obtained. When the cooling operation time is equal to the second preset time, the second plate heat exchanger outflow temperature is obtained. When the cooling operation time is equal to the third preset time, the third plate heat exchanger outflow temperature is obtained. When the cooling operation time is equal to the fourth preset time, the fourth plate heat exchanger outflow temperature and the condenser outflow temperature are obtained. Among them, the first preset time is less than the first preset supercooling valve opening time. The second preset time is greater than the first preset supercooling valve opening time. The third preset time is greater than the second preset time. The fourth preset time is equal to the second preset time, at which time the second plate heat exchanger outflow temperature is equal to the fourth plate heat exchanger outflow temperature. Determine the first temperature difference between the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. A second temperature difference between the outflow temperature of the second plate heat exchanger and the outflow temperature of the third plate heat exchanger is determined. A third temperature difference between the outflow temperature of the fourth plate heat exchanger and the outflow temperature of the condenser is determined. When the first temperature difference is greater than the first preset temperature difference, the second temperature difference is greater than the second preset temperature difference, and the third temperature difference is greater than the third preset temperature difference, it is determined that the subcooling valve is not faulty. Otherwise, the subcooling valve is faulty.

[0050] In some embodiments, the electronic device obtains the current operation mode. When the current operation mode is the cooling operation mode, the cooling operation time is accumulated. When the cooling operation time is equal to the first preset time, the refrigerant radiator inlet temperature and the first plate heat exchanger outflow temperature are obtained. When the cooling operation time is equal to the fourth preset time, the fourth plate heat exchanger outflow temperature and the condenser outflow temperature are obtained. When the cooling operation time is equal to the fifth preset time, the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature are obtained. Among them, the first preset time is less than the first preset supercooling valve opening time. The fourth preset time is greater than the first preset supercooling valve opening time. The fifth preset time is equal to the fourth preset time, at which time the fourth plate heat exchanger outflow temperature is equal to the fifth plate heat exchanger outflow temperature. Determine the first temperature difference between the refrigerant radiator inlet temperature and the first plate heat exchanger outflow temperature. Determine the third temperature difference between the fourth plate heat exchanger outflow temperature and the condenser outflow temperature. Determine the fourth temperature difference between the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature. If the first temperature difference value is greater than the first preset temperature difference value, the third temperature difference value is greater than the third preset temperature difference value, and the fourth temperature difference value is greater than the fourth preset temperature difference value, it is determined that the supercooling valve is not faulty. Otherwise, the supercooling valve is faulty.

[0051] Optionally, after obtaining the current operation mode, it also includes: when the current operation mode is the heating operation mode, accumulating the heating operation time. When the heating operation time is equal to the sixth preset time, obtaining the first intake pipe pressure value. When the heating operation time is equal to the seventh preset time, obtaining the second intake pipe pressure value. Determine whether the subcooling valve is faulty based on the first intake pipe pressure value and the second intake pipe pressure value. In this way, since the air conditioner is in the process of heating operation, the intake pipe pressure value before the subcooling valve is opened will show a higher characteristic than the intake pipe pressure value after the subcooling valve is opened. Therefore, during the heating operation of the air conditioner, the intake pipe pressure value is judged. It can automatically and accurately detect whether the subcooling valve is faulty, and there is no need to manually judge whether the subcooling valve is faulty, which improves the efficiency of determining whether the cooling valve is faulty.

[0052] Optionally, determining whether the subcooling valve is faulty based on the first intake pipe pressure value and the second intake pipe pressure value includes: determining a pressure difference between the first intake pipe pressure value and the second intake pipe pressure value; when the pressure difference is greater than a preset pressure threshold, determining that the subcooling valve is not faulty; otherwise, the subcooling valve is faulty.

[0053] In some embodiments, the sixth preset duration is less than the second preset supercooling valve opening duration, and the seventh preset duration is greater than the second preset supercooling valve opening duration. Usually, after the air conditioner turns on the heating operation mode, the compressor will start first, and the supercooling valve will not be started until the compressor has run for a period of time. The time interval from the start of the heating operation mode of the air conditioner to the opening of the cold valve is called the second preset supercooling valve opening duration. Among them, the valve opening of the supercooling valve is above 200PLS, and PLS is the pulse unit of the encoder. In this way, since the air conditioner is in the process of heating operation, the suction pipe pressure value before the supercooling valve is opened will show a higher characteristic than the suction pipe pressure value after the supercooling valve is opened. Therefore, during the heating operation of the air conditioner, the suction pipe pressure value before and after the supercooling valve is opened is judged. It can automatically and accurately detect whether the supercooling valve is faulty, and there is no need to manually judge whether the supercooling valve is faulty, which improves the efficiency of determining whether the cold valve is faulty.

[0054] Combination Figure 4 As shown, the embodiment of the present disclosure provides a second method for detecting a subcooling valve failure, comprising:

[0055] In step S401, the electronic device obtains the current operation mode, and then executes step S402.

[0056] In step S402, the electronic device determines whether the current operation mode is the cooling operation mode; if the current operation mode is the cooling operation mode, step S403 is executed; if the current operation mode is the heating operation mode, step S408 is executed.

[0057] Step S403, when the current operation mode of the electronic device is the cooling operation mode, the refrigeration operation time is accumulated; when the refrigeration operation time is equal to the first preset time, the refrigerant radiator inlet temperature and the first plate heat exchanger outlet temperature are obtained, and then step S404 is executed.

[0058] Step S404, the electronic device obtains the outflow temperature of the second plate heat exchanger when the refrigeration operation time is equal to the second preset time; when the refrigeration operation time is equal to the third preset time, the electronic device obtains the outflow temperature of the third plate heat exchanger, and then executes step S405.

[0059] Step S405: When the cooling operation time is equal to the fourth preset time, the electronic device obtains the fourth plate heat exchanger outflow temperature and the condenser outflow temperature, and then executes step S406.

[0060] Step S406: When the cooling operation time is equal to the fifth preset time, the electronic device obtains the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outlet temperature, and then executes step S407.

[0061] Step S407, the electronic device determines whether the supercooling valve is faulty based on the refrigerant radiator inlet temperature, the first plate heat exchanger outflow temperature, the second plate heat exchanger outflow temperature, the third plate heat exchanger outflow temperature, the fourth plate heat exchanger outflow temperature, the condenser outflow temperature, the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature.

[0062] Step S408, the electronic device accumulates the heating operation time; when the heating operation time is equal to the fifth preset time, obtains the first intake pipe pressure value; when the heating operation time is equal to the sixth preset time, obtains the second intake pipe pressure value; determines whether the supercooling valve is faulty according to the first intake pipe pressure value and the second intake pipe pressure value.

[0063] The second method for detecting a subcooling valve failure provided by the embodiment of the present disclosure is adopted, by determining the operating mode of the multi-split air conditioner. In the case of cooling of the multi-split air conditioner, whether the subcooling valve is faulty is determined based on the refrigerant radiator inlet temperature, the first plate heat exchanger outflow temperature, the second plate heat exchanger outflow temperature, the third plate heat exchanger outflow temperature, the fourth plate heat exchanger outflow temperature, the condenser outflow temperature, the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature. In the case of heating of the multi-split air conditioner, whether the subcooling valve is faulty is determined based on the first suction pipe pressure value and the second suction pipe pressure value. It is possible to determine in a targeted manner whether the subcooling valve of the multi-split air conditioner is damaged in different modes.

[0064] Further, determining whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature, the first plate heat exchanger outflow temperature, the second plate heat exchanger outflow temperature, the third plate heat exchanger outflow temperature, the fourth plate heat exchanger outflow temperature, the condenser outflow temperature, the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature includes: determining a first temperature difference between the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. Determining a second temperature difference between the second plate heat exchanger outflow temperature and the third plate heat exchanger outflow temperature. Determining a third temperature difference between the fourth plate heat exchanger outflow temperature and the condenser outflow temperature. Determining a fourth temperature difference between the indoor unit evaporator inlet pipe temperature and the fifth plate heat exchanger outflow temperature. When the first temperature difference is greater than the first preset temperature difference, the second temperature difference is greater than the second preset temperature difference, the third temperature difference is greater than the third preset temperature difference, and the fourth temperature difference is greater than the fourth preset temperature difference, it is determined that the supercooling valve is not faulty. Otherwise, the supercooling valve is faulty.

[0065] Optionally, after determining whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature, the method further includes: displaying the fault condition to the user. In this way, the fault condition is displayed to the user, which facilitates the user to maintain the faulty supercooling valve.

[0066] Optionally, presenting the fault condition to the user includes: pushing the fault condition to a preset terminal device, wherein the terminal device includes electronic devices capable of display, such as a television, a mobile phone, a computer, and a tablet.

[0067] Optionally, displaying the fault condition to the user includes: sending the fault condition to a preset display screen, triggering the display screen to display the fault condition.

[0068] Combination Figure 5 As shown, the embodiment of the present disclosure provides a device for detecting a supercooling valve fault, comprising: a first acquisition module 501, a duration accumulation module 502, a second acquisition module 503 and a fault determination module 504. The first acquisition module 501 is configured to acquire the current operation mode; the duration accumulation module 502 is configured to accumulate the refrigeration operation time when the current operation mode is the refrigeration operation mode; the second acquisition module 503 is configured to acquire the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature when the refrigeration operation time is equal to the first preset time; the fault determination module 504 is configured to determine whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature.

[0069] The device for detecting the failure of the supercooling valve provided by the embodiment of the present disclosure is used to obtain the current operation mode through the first acquisition module; the duration accumulation module accumulates the refrigeration operation time when the current operation mode is the refrigeration operation mode; the second acquisition module obtains the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature when the refrigeration operation time is equal to the first preset time; the fault determination module determines whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. In this way, since there is a regularity in the changes of the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature when the air conditioner is in the process of refrigeration operation and the supercooling valve is not faulty, therefore, it is possible to automatically detect whether the supercooling valve is faulty through the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature, without the need for manual judgment of whether the supercooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0070] Combination Figure 6 As shown, an embodiment of the present disclosure provides an electronic device, including a processor (processor) 600 and a memory (memory) 601. Optionally, the device may also include a communication interface (Communication Interface) 602 and a bus 603. Among them, the processor 600, the communication interface 602, and the memory 601 can communicate with each other through the bus 603. The communication interface 602 can be used for information transmission. The processor 600 can call the logic instructions in the memory 601 to execute the method for detecting a supercooling valve fault condition of the above embodiment.

[0071] In addition, the logic instructions in the memory 601 described above can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0072] The memory 601 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 600 executes the function application and data processing by running the program instructions / modules stored in the memory 601, that is, the method for detecting the failure of the subcooling valve in the above embodiment is implemented.

[0073] The memory 601 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the air conditioner, etc. In addition, the memory 601 may include a high-speed random access memory and may also include a non-volatile memory.

[0074] In some embodiments, the electronic device is an air conditioner or a fault detection device for an air conditioner.

[0075] The electronic device using the embodiment of the present disclosure obtains the current operation mode; when the current operation mode is the cooling operation mode, accumulates the cooling operation time; when the cooling operation time is equal to the first preset time, obtains the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature; determines whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first plate heat exchanger outflow temperature. In this way, since the air conditioner is in the process of cooling operation, when the supercooling valve is not faulty, the changes of the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature have a regularity, therefore, the refrigerant radiator outflow temperature and the plate heat exchanger outflow temperature can automatically detect whether the supercooling valve is faulty, without the need for manual judgment of whether the supercooling valve is faulty, thereby improving the efficiency of determining whether the cold valve is faulty.

[0076] An embodiment of the present disclosure provides a storage medium storing program instructions, which, when run, execute the above method for detecting a subcooling valve failure.

[0077] An embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned method for detecting a subcooling valve fault condition.

[0078] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0079] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer air conditioner (which can be a personal computer, air conditioner, or network air conditioner, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium can be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0080] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or air conditioning including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0081] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0082] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, air conditioners, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0083] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for detecting a subcooling valve failure, characterized in that: include: Get the current running mode; When the current operation mode is a cooling operation mode, the accumulated cooling operation time; When the refrigeration operation time is equal to the first preset time, obtaining the refrigerant radiator inflow temperature and the first outflow temperature of the plate heat exchanger; determining whether a supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first outflow temperature of the plate heat exchanger; Determining whether the supercooling valve is faulty according to the inflow temperature of the refrigerant radiator and the first outflow temperature of the plate heat exchanger includes: determining a first temperature difference between the inflow temperature of the refrigerant radiator and the first outflow temperature of the plate heat exchanger; if the first temperature difference is greater than a first preset temperature difference, determining that the supercooling valve is not faulty; otherwise, the supercooling valve is faulty; Among them, one end of the refrigerant radiator is connected to one end of the main electronic expansion valve, the other end of the main electronic expansion valve is connected to one end of the fifth filter, the other end of the fifth filter is connected to one end of the condenser, the other end of the condenser is connected to the C port of the four-way valve, the S port of the four-way valve is connected to the first port of the plate heat exchanger, the other end of the refrigerant radiator is connected to one end of the supercooling valve and the second port of the plate heat exchanger, the other end of the supercooling valve is connected to the third port of the plate heat exchanger, and the fourth port of the plate heat exchanger is connected to one end of the sixth filter; a first temperature sensor is arranged on the connecting pipe between the main electronic expansion valve and the refrigerant radiator, and the first temperature sensor is used to detect the inflow temperature of the refrigerant radiator; a second temperature sensor is arranged on the connecting pipe connecting the fourth port of the plate heat exchanger to the sixth filter, and the second temperature sensor is used to detect the outflow temperature of the plate heat exchanger; a third temperature sensor is arranged on the connecting pipe between the condenser and the fifth filter, and the third temperature sensor is used to detect the outflow temperature of the condenser.

2. The method according to claim 1, characterized in that Determining whether a supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first outflow temperature of the plate heat exchanger includes: When the refrigeration operation time is equal to the second preset time, obtain the second outflow temperature of the plate heat exchanger; when the refrigeration operation time is equal to the third preset time, obtain the third outflow temperature of the plate heat exchanger; determine the first temperature difference between the inflow temperature of the refrigerant radiator and the first outflow temperature of the plate heat exchanger, and determine the second temperature difference between the second outflow temperature of the plate heat exchanger and the third outflow temperature of the plate heat exchanger; when the first temperature difference is greater than the first preset temperature difference and the second temperature difference is greater than the second preset temperature difference, determine that the subcooling valve is not faulty; otherwise, the subcooling valve is faulty; wherein the second preset temperature difference is less than the first preset temperature value; the first preset time is less than the first preset subcooling valve opening time, and the second preset time is greater than the first preset subcooling valve opening time; the first preset subcooling valve opening time is the time interval between starting the refrigeration operation mode and opening the subcooling valve; the third preset time is greater than the second preset time.

3. The method according to claim 1, characterized in that Determining whether a supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first outflow temperature of the plate heat exchanger includes: When the refrigeration operation time is equal to the fourth preset time, obtain the fourth outflow temperature of the plate heat exchanger and the condenser outflow temperature; determine the third temperature difference between the fourth outflow temperature of the plate heat exchanger and the condenser outflow temperature; when the first temperature difference is greater than the first preset temperature difference and the third temperature difference is greater than the third preset temperature difference, determine that the subcooling valve is not faulty; otherwise, the subcooling valve is faulty; the first preset time is less than the first preset subcooling valve opening time, and the fourth preset time is greater than the first preset subcooling valve opening time; the first preset subcooling valve opening time is the time interval between starting the refrigeration operation mode and opening the subcooling valve.

4. The method according to claim 1, characterized in that: Determining whether a supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first outflow temperature of the plate heat exchanger includes: When the refrigeration operation time is equal to the fifth preset time, obtain the indoor unit evaporator inlet pipe temperature and the fifth outflow temperature of the plate heat exchanger; determine the first temperature difference between the refrigerant radiator inlet temperature and the first outflow temperature of the plate heat exchanger; determine the fourth temperature difference between the indoor unit evaporator inlet pipe temperature and the fifth outflow temperature of the plate heat exchanger; when the first temperature difference is greater than the first preset temperature difference and the fourth temperature difference is greater than the fourth preset temperature difference, determine that the subcooling valve is not faulty; the first preset time is less than the first preset subcooling valve opening time, and the fifth preset time is greater than the first preset subcooling valve opening time; the first preset subcooling valve opening time is the time interval between starting the refrigeration operation mode and opening the subcooling valve.

5. The method according to any one of claims 1 to 4, characterized in that: After getting the current running mode, it also includes: When the current operation mode is the heating operation mode, the accumulated heating operation time; When the heating operation time is equal to a sixth preset time, obtaining a first pressure value of the intake pipe; When the heating operation time is equal to the seventh preset time, obtaining a second pressure value of the intake pipe; determining a pressure difference between a first pressure value of the intake duct and a second pressure value of the intake duct; In the case where the pressure difference is greater than a preset pressure threshold, it is determined that the supercooling valve is not faulty; otherwise, the supercooling valve is faulty; The sixth preset time length is less than the second preset time length for opening the supercooling valve, and the seventh preset time length is greater than the second preset time length for opening the supercooling valve; the second preset time length for opening the supercooling valve is the time interval from starting the heating operation mode to opening the supercooling valve.

6. A device for detecting a subcooling valve failure, characterized in that: include: A first acquisition module is configured to acquire a current operation mode; A duration accumulation module, configured to accumulate cooling operation time when the current operation mode is a cooling operation mode; A second acquisition module is configured to acquire, when the refrigeration operation time is equal to the first preset time, a refrigerant radiator inflow temperature and a first outflow temperature of the plate heat exchanger; a fault determination module configured to determine whether the supercooling valve is faulty according to the refrigerant radiator inflow temperature and the first outflow temperature of the plate heat exchanger; Determining whether the supercooling valve is faulty according to the inflow temperature of the refrigerant radiator and the first outflow temperature of the plate heat exchanger includes: determining a first temperature difference between the inflow temperature of the refrigerant radiator and the first outflow temperature of the plate heat exchanger; if the first temperature difference is greater than a first preset temperature difference, determining that the supercooling valve is not faulty; otherwise, the supercooling valve is faulty; Among them, one end of the refrigerant radiator is connected to one end of the main electronic expansion valve, the other end of the main electronic expansion valve is connected to one end of the fifth filter, the other end of the fifth filter is connected to one end of the condenser, the other end of the condenser is connected to the C port of the four-way valve, the S port of the four-way valve is connected to the first port of the plate heat exchanger, the other end of the refrigerant radiator is connected to one end of the supercooling valve and the second port of the plate heat exchanger, the other end of the supercooling valve is connected to the third port of the plate heat exchanger, and the fourth port of the plate heat exchanger is connected to one end of the sixth filter; a first temperature sensor is arranged on the connecting pipe between the main electronic expansion valve and the refrigerant radiator, and the first temperature sensor is used to detect the inflow temperature of the refrigerant radiator; a second temperature sensor is arranged on the connecting pipe connecting the fourth port of the plate heat exchanger to the sixth filter, and the second temperature sensor is used to detect the outflow temperature of the plate heat exchanger; a third temperature sensor is arranged on the connecting pipe between the condenser and the fifth filter, and the third temperature sensor is used to detect the outflow temperature of the condenser.

7. An electronic device comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for detecting a subcooling valve failure condition according to any one of claims 1 to 5 when executing the program instructions.

8. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for detecting a subcooling valve failure condition according to any one of claims 1 to 5 is executed.

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