Method and device for judging reverse insertion of expansion valve, electronic equipment and storage medium

Abstract

This application relates to the field of air conditioning technology and discloses a method for determining whether an expansion valve is reversed. The method includes: obtaining the current operating mode; accumulating the cooling operation time when the current operating mode is cooling mode; obtaining the outlet temperature of a first subcooling valve when the cooling operation time equals a first preset time; obtaining the outlet temperature of a second subcooling valve when the cooling operation time equals a second preset time; and determining whether the main electronic expansion valve and the subcooling valve are reversed based on the outlet temperatures of the first and second subcooling valves. In this way, the outlet temperatures of the first and second subcooling valves can automatically determine whether the main electronic expansion valve and the subcooling valve are reversed, eliminating the need for manual judgment and improving the efficiency of detecting whether the main electronic expansion valve and the subcooling valve are reversed. This application also discloses a device, electronic equipment, and storage medium for determining whether an expansion valve is reversed.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, such as a method and apparatus for determining the reverse insertion of an expansion valve, electronic equipment, and storage medium. Background Technology

[0002] With the advent of secondary subcooling devices, more and more multi-split air conditioners are equipped with them, which typically include a subcooling valve. This means that during the assembly of multi-split air conditioners on the production line, it is necessary to disassemble and install not only the main electronic expansion valve but also the subcooling valve. Because the main electronic expansion valve and the subcooling valve have the same structure, there is a possibility that they might be installed backwards during assembly.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0004] In related technologies, manually determining whether the main electronic expansion valve and the subcooling valve are reversed is inefficient. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a method, apparatus, electronic device, and storage medium for determining whether an expansion valve is inserted in reverse, thereby improving the efficiency of detecting whether the main electronic expansion valve and the subcooling valve are inserted in reverse.

[0007] In some embodiments, the method for determining whether the expansion valve is inserted in reverse includes: obtaining the current operating mode; when the current operating mode is a cooling operating mode, accumulating the cooling operating time; when the cooling operating time is equal to a first preset time, obtaining the outlet temperature of the first subcooling valve; when the cooling operating time is equal to a second preset time, obtaining the outlet temperature of the second subcooling valve; and determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves.

[0008] In some embodiments, the device for determining whether the expansion valve is inserted in reverse includes: a first acquisition module configured to acquire the current operating mode; a timing module configured to accumulate the cooling operation time when the current operating mode is a cooling operation mode; a second acquisition module configured to acquire the outlet temperature of the first subcooling valve when the cooling operation time is equal to a first preset time; a second acquisition module configured to acquire the outlet temperature of the second subcooling valve when the cooling operation time is equal to a second preset time; and an insertion reverse determination module configured to determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves.

[0009] In some embodiments, the electronic device includes a processor and a memory storing program instructions, the processor being configured to execute the above-described method for determining the reverse insertion of the expansion valve when the program instructions are executed.

[0010] In some embodiments, the storage medium stores program instructions that, when executed, perform the aforementioned method for determining whether the expansion valve is reversed.

[0011] The method, apparatus, electronic device, and storage medium for determining whether an expansion valve is reversed, provided in this disclosure, can achieve the following technical effects: By acquiring the current operating mode; when the current operating mode is cooling mode, accumulating the cooling operation time; when the cooling operation time equals a first preset time, acquiring the outlet temperature of the first subcooling valve; when the cooling operation time equals a second preset time, acquiring the outlet temperature of the second subcooling valve; and determining whether the main electronic expansion valve and the subcooling valve are reversed based on the outlet temperatures of the first and second subcooling valves. Thus, since the outlet temperature of the subcooling valve changes regularly depending on whether the main electronic expansion valve and the subcooling valve are reversed during air conditioning cooling operation, the outlet temperatures of the first and second subcooling valves can automatically determine whether the main electronic expansion valve and the subcooling valve are reversed without manual judgment, improving the efficiency of detecting whether the main electronic expansion valve and the subcooling valve are reversed.

[0012] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0013] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0014] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this disclosure;

[0015] Figure 2 This is a schematic diagram of another air conditioner provided in an embodiment of this disclosure;

[0016] Figure 3 This is a schematic diagram of the first method for determining the reverse insertion of an expansion valve provided in this embodiment of the present disclosure;

[0017] Figure 4 This is a schematic diagram of the second method for determining the reverse insertion of an expansion valve provided in this embodiment of the present disclosure;

[0018] Figure 5 This is a schematic diagram of a device for controlling the opening degree of an expansion valve provided in an embodiment of this disclosure;

[0019] Figure 6 This is a schematic diagram of an electronic device provided in an embodiment of this disclosure.

[0020] Figure label:

[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 shut-off valve; 9: Liquid pipe shut-off 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: First temperature sensor; 30: High-pressure valve... Force sensor; 31: Low-pressure sensor; 32: Second temperature sensor; 33: Third 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 Implementation

[0022] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0023] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

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

[0025] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0026] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0027] This application applies to multi-split air conditioners and is used to detect whether the subcooling valves installed in the main electronic expansion valve and the secondary subcooling unit of a multi-split air conditioner are reversed. The multi-split air conditioner includes: a primary subcooling unit, a secondary subcooling unit, and a main electronic expansion valve. The primary subcooling unit is used for controlled primary subcooling of the refrigerant, and the secondary subcooling unit is used for controlled secondary subcooling of the refrigerant after primary subcooling. Optionally, the primary subcooling unit includes a condenser; the secondary subcooling unit includes a plate heat exchanger and a subcooling valve. The subcooling valve is an electronic expansion valve used to control the refrigerant flow rate through the plate heat exchanger. The main electronic expansion valve is used to control the total refrigerant flow rate in the piping.

[0028] In some embodiments. Figure 1 This is a structural diagram of an air conditioner. Figure 1As shown, the first indoor unit 1 is equipped 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 shut-off valve 8 via a 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 shut-off valve 9 via a second capacitor 7. The e-port of the four-way valve 10 is connected to the other end of the gas pipe shut-off 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 oil separator 15 is connected to one end of compressor 18, and the other end of compressor 18 is connected to the other end of gas separator 13 and one end of second capillary tube 19. The third port of oil separator 15 is connected to one end of fourth filter 34, and the other end of fourth filter 34 is connected to the other end of second capillary tube 19. The other end of condenser 11 is connected to one end of fifth filter 20, the other end of fifth filter 20 is connected to one end of main electronic expansion valve 21, the other end of main electronic expansion valve 21 is connected to one end of refrigerant radiator 22, the other end of refrigerant radiator 22 is connected to one end of subcooling valve 23 and the second port of plate heat exchanger 14. The other end of subcooling valve 23 is connected to the third port of plate heat exchanger 14. The fourth port of plate heat exchanger 14 is connected to one end of sixth filter 24. The other end of sixth filter 24 is connected to the other end of liquid line shut-off valve 9. The air conditioner is also equipped with heater 25 for heating the condenser. The air conditioner is also equipped with fan 26 for blowing air onto the condenser. A high-pressure switch 27 is installed on the connecting pipe between the second port of the oil separator 15 and the compressor 18. A low-pressure switch 28 is installed on the connecting pipe between the compressor 18 and the gas separator 13. A first temperature sensor 29 is installed on the connecting pipe between the subcooling valve 23 and the plate heat exchanger 14, and the first temperature sensor is used to detect the outlet temperature of the subcooling valve. A high-pressure sensor 30 is installed on the connecting pipe between the d port of the four-way valve 10 and the oil separator 15, and the high-pressure sensor is used to detect the exhaust pipe pressure. A low-pressure sensor 31 is installed on the connecting pipe between the s port of the four-way valve 10 and the gas separator 13, and the low-pressure sensor is used to detect the suction pipe pressure. A second temperature sensor 32 is installed on the connecting pipe between the condenser 11 and the fifth filter 20, and the second temperature sensor is used to detect the condenser outlet temperature. A third temperature sensor 33 is installed 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 main electronic expansion valve outlet temperature.

[0029] In some embodiments, Figure 2 This is a structural diagram of an air conditioner. (Combined with...) Figure 2 As shown, the air conditioner has multiple indoor units, such as: Indoor Unit 1, Indoor Unit 35, Indoor Unit 36, and Indoor Unit 37. The Indoor Unit 2 has 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 shut-off valve 8 via 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 shut-off valve 7 via a Fourth Capacitor 43. The Indoor Unit 36 ​​has 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 shut-off valve 8 via 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 line shut-off valve 9 via the sixth capacitor 49. The fourth indoor unit 37 is equipped 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 line shut-off valve 8 via 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 line shut-off valve 9 via the eighth capacitor 55.

[0030] Combination Figure 3 As shown, this disclosure provides a first method for determining if an expansion valve is inserted in reverse, including:

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

[0032] Step S302: When the electronic device is currently operating in cooling mode, the cumulative cooling operating time is recorded.

[0033] Step S303: When the cooling operation time is equal to the first preset time, the electronic device obtains the outlet temperature of the first subcooling valve.

[0034] Step S304: When the cooling operation time is equal to the second preset time, the electronic device obtains the outlet temperature of the second subcooling valve.

[0035] In step S305, the electronic device determines whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperature of the first subcooling valve and the outlet temperature of the second subcooling valve.

[0036] The method for determining expansion valve reversal provided in this embodiment of the invention is used to obtain the current operating mode. If the current operating mode is a cooling operating mode, the cooling operating time is accumulated. If the cooling operating time equals a first preset time, the outlet temperature of the first subcooling valve is obtained.

[0037] When the cooling operation time equals the second preset time, the outlet temperature of the second subcooling valve is obtained. The outlet temperatures of the first and second subcooling valves are used to determine whether the main electronic expansion valve and the subcooling valve are reversed. Thus, during the cooling operation of the air conditioner, the outlet temperature of the subcooling valve exhibits a regular change regardless of whether the main electronic expansion valve and the subcooling valve are reversed or not. Therefore, the outlet temperatures of the first and second subcooling valves can automatically determine whether the main electronic expansion valve and the subcooling valve are reversed without manual judgment, improving the efficiency of detecting whether the main electronic expansion valve and the subcooling valve are reversed.

[0038] In some embodiments, the first preset duration is shorter than the preset subcooling valve opening duration, and the second preset duration is longer than the preset subcooling valve opening duration. Typically, after the air conditioner is switched to cooling mode, the compressor starts first, and the subcooling valve is activated only after the compressor has been running for a period of time. The time interval between the air conditioner starting cooling mode and the subcooling valve opening is called the subcooling valve opening duration.

[0039] Furthermore, determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves includes: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves. If the first temperature difference is less than or equal to a first preset temperature difference, it is determined that the main electronic expansion valve and the subcooling valve are inserted in reverse. Thus, because the outlet temperature of the subcooling valve will undergo specific changes before and after the air conditioner begins cooling operation when the main electronic expansion valve and the subcooling valve are inserted in reverse, the first temperature difference between the outlet temperatures of the first and second subcooling valves can accurately determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse.

[0040] Optionally, determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves includes: obtaining the pipe pressure value when the cooling operation duration is equal to a third preset duration. The main electronic expansion valve and the subcooling valve are then determined to be inserted in reverse based on the pipe pressure value, the outlet temperatures of the first and second subcooling valves. The third preset duration is longer than the preset subcooling valve opening duration. Thus, if the main electronic expansion valve and the subcooling valve are inserted in reverse, the main electronic expansion valve will be closed while the subcooling valve will be open after the air conditioner starts cooling. In this case, the main valve closing will cause the air conditioner to experience excessively high exhaust pipe pressure or excessively low suction pipe pressure. Therefore, by using the pipe pressure value, the outlet temperatures of the first and second subcooling valves, it is possible to accurately determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse.

[0041] Optionally, the pipeline pressure value is the exhaust pipe pressure value. Determining whether the main electronic expansion valve and the subcooling valve are reversed based on the pipeline pressure value, the outlet temperature of the first subcooling valve, and the outlet temperature of the second subcooling valve includes: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves. If the exhaust pipe pressure value is greater than a first preset pressure value and the first temperature difference is less than or equal to the first preset temperature difference value, it is determined that the main electronic expansion valve and the subcooling valve are reversed.

[0042] Optionally, the pipeline pressure value is the suction pipe pressure value. Determining whether the main electronic expansion valve and the subcooling valve are reversed based on the pipeline pressure value, the outlet temperature of the first subcooling valve, and the outlet temperature of the second subcooling valve includes: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves. If the suction pipe pressure value is less than a second preset pressure value and the first temperature difference is less than or equal to the first preset temperature difference value, it is determined that the main electronic expansion valve and the subcooling valve are reversed.

[0043] Optionally, determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves includes: acquiring alarm information. Determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the alarm information, the outlet temperatures of the first and second subcooling valves.

[0044] Furthermore, the alarm information includes: exhaust pipe high-pressure alarm information or intake pipe low-pressure alarm information; based on the alarm information, the outlet temperatures of the first and second subcooling valves, it is determined whether the main electronic expansion valve and the subcooling valve are inserted in reverse, including: determining the first temperature difference between the outlet temperatures of the first and second subcooling valves. If an exhaust pipe high-pressure alarm information or an intake pipe low-pressure alarm information is detected, and the first temperature difference is less than or equal to a first preset temperature difference value, it is determined that the main electronic expansion valve and the subcooling valve are inserted in reverse. In this way, by directly acquiring the alarm information from inside the multi-split air conditioner, it is possible to quickly determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse.

[0045] Optionally, determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves includes: obtaining the condenser outlet temperature and the main electronic expansion valve outlet temperature when the cooling operation duration is equal to a fourth preset duration. The determination of whether the main electronic expansion valve and the subcooling valve are inserted in reverse is based on the condenser outlet temperature, the main electronic expansion valve outlet temperature, the first subcooling valve outlet temperature, and the second subcooling valve outlet temperature. The fourth preset duration is longer than a preset subcooling valve opening duration. Thus, when the main electronic expansion valve and the subcooling valve are inserted in reverse, the refrigerant temperature will rise after flowing through the main electronic expansion valve during air conditioning cooling operation. Therefore, by combining the outlet temperatures of the first and second subcooling valves, the condenser outlet temperature, and the main electronic expansion valve outlet temperature, it is possible to more accurately determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse.

[0046] Furthermore, determining whether the main electronic expansion valve and the subcooling valve are installed backwards is based on the condenser outlet temperature, the first subcooling valve outlet temperature, and the second subcooling valve outlet temperature. This includes: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves; determining a second temperature difference between the condenser outlet temperature and the main electronic expansion valve outlet temperature; and determining that the main electronic expansion valve and the subcooling valve are installed backwards if the first temperature difference is less than or equal to a first preset temperature difference and the second temperature difference is greater than or equal to a second preset temperature difference. Thus, even when the main electronic expansion valve and the subcooling valve are not installed backwards, the condenser outlet temperature and the condenser outlet temperature will exhibit a regular change. Therefore, combining the subcooling valve outlet temperature, the condenser outlet temperature, and the condenser outlet temperature allows for accurate determination of whether the main electronic expansion valve and the subcooling valve are installed backwards.

[0047] Combination Figure 4 As shown in the embodiments of this disclosure, a method for determining whether an expansion valve is inserted in reverse is provided, including:

[0048] Step S401: The electronic device obtains the current operating mode;

[0049] Step S402: When the electronic device is currently in cooling mode, the cumulative cooling runtime is recorded.

[0050] Step S403: When the cooling operation time of the electronic device is equal to the first preset time, the outlet temperature of the first subcooling valve is obtained.

[0051] Step S404: When the cooling operation time of the electronic device is equal to the second preset time, the outlet temperature of the second subcooling valve is obtained.

[0052] Step S405: When the cooling operation time is equal to the third preset time, the electronic device obtains the pipeline pressure value;

[0053] Step S406: When the cooling operation time is equal to the fourth preset time, the electronic device acquires the condenser outlet temperature and the main electronic expansion valve outlet temperature.

[0054] In step S407, the electronic device determines whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperature of the first subcooling valve, the outlet temperature of the second subcooling valve, the pipeline pressure value, the outlet temperature of the condenser, and the outlet temperature of the main electronic expansion valve.

[0055] The method for determining whether an expansion valve is inserted incorrectly, as provided in this embodiment, is adopted by obtaining the current operating mode. When the current operating mode is cooling mode, the cooling operation time is accumulated. If the cooling operation time equals a first preset time, the outlet temperature of the first subcooling valve is obtained. If the cooling operation time equals a second preset time, the outlet temperature of the second subcooling valve is obtained. If the cooling operation time equals a third preset time, the pipeline pressure value is obtained. If the cooling operation time equals a fourth preset time, the condenser outlet temperature and the main electronic expansion valve outlet temperature are obtained. Based on the outlet temperatures of the first and second subcooling valves, the pipeline pressure value, the condenser outlet temperature, and the main electronic expansion valve outlet temperature, it is determined whether the main electronic expansion valve and the subcooling valve are inserted incorrectly. In this way, since the outlet temperatures of the first subcooling valve, the second subcooling valve, the pipe pressure, the condenser outlet temperature, and the main electronic expansion valve all change regularly during the cooling operation of the air conditioner, the system can automatically and accurately determine whether the main electronic expansion valve and the subcooling valve are reversed by using these parameters, without requiring manual judgment. This improves the efficiency of detecting whether the main electronic expansion valve and the subcooling valve are reversed.

[0056] Furthermore, the pipeline pressure value is the exhaust pipe pressure value. Determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves, the pipeline pressure value, the condenser outlet temperature, and the main electronic expansion valve outlet temperature includes: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves; determining a second temperature difference between the outlet temperatures of the condenser and the main electronic expansion valve. If one or more of the following conditions exist: the first temperature difference is less than or equal to a first preset temperature difference, the second temperature difference is greater than or equal to a second preset temperature difference, and the exhaust pipe pressure value is greater than a first preset pressure value, then the main electronic expansion valve and the subcooling valve are determined to be inserted in reverse. Otherwise, it is determined that the main electronic expansion valve and the subcooling valve are not inserted in reverse.

[0057] Furthermore, the pipeline pressure value is the suction pipe pressure value. Determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse is based on the outlet temperatures of the first and second subcooling valves, the pipeline pressure value, the condenser outlet temperature, and the main electronic expansion valve. This includes: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves; and determining a second temperature difference between the outlet temperatures of the condenser and the main electronic expansion valve. If one or more of the following conditions exist: the first temperature difference is less than or equal to a first preset temperature difference value, the second temperature difference is greater than or equal to a second preset temperature difference value, and the suction pipe pressure value is less than a second preset pressure value, then the main electronic expansion valve and the subcooling valve are determined to be inserted in reverse. Otherwise, the main electronic expansion valve and the subcooling valve are determined to be inserted correctly. Thus, during the cooling operation of the air conditioner, the outlet temperatures of the subcooling valve, the pipeline pressure value, the condenser outlet temperature, and the main electronic expansion valve will all exhibit regular changes, regardless of whether the main electronic expansion valve and the subcooling valve are inserted in reverse or not. By combining the changing patterns of several parameters, it is possible to determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse order, which is more accurate and less prone to misjudgment.

[0058] Optionally, after determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves, the method further includes: showing the user whether the main electronic expansion valve and the subcooling valve are inserted in reverse. This allows the user to easily adjust the main electronic expansion valve and the subcooling valve if they are inserted in reverse.

[0059] Optionally, displaying whether the main electronic expansion valve and the subcooling valve are inserted in reverse to the user includes: pushing the display of whether the main electronic expansion valve and the subcooling valve are inserted in reverse to the user to a preset terminal device. The terminal device includes electronic devices capable of display, such as televisions, mobile phones, computers, and tablets.

[0060] Optionally, displaying to the user whether the main electronic expansion valve and the subcooling valve are inserted in reverse includes: sending the information on whether the main electronic expansion valve and the subcooling valve are inserted in reverse to a preset display screen, triggering the display screen to show whether the main electronic expansion valve and the subcooling valve are inserted in reverse.

[0061] Combination Figure 5As shown in the figure, this disclosure provides a device for determining whether an expansion valve is inserted in reverse, including: a first acquisition module 501, a timing module 502, a second acquisition module 503, a third acquisition module 504, and an insertion-reversal determination module 505. The first acquisition module 501 is configured to acquire the current operating mode. The timing module 502 is configured to accumulate the cooling operation time when the current operating mode is a cooling operation mode. The second acquisition module 503 is configured to acquire the outlet temperature of the first subcooling valve when the cooling operation time equals a first preset time. The third acquisition module 504 is configured to acquire the outlet temperature of the second subcooling valve when the cooling operation time equals a second preset time. The insertion-reversal determination module 505 is configured to determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves.

[0062] The device for determining whether an expansion valve is reversed, as provided in this embodiment, acquires the current operating mode through a first acquisition module. A timing module accumulates the cooling operation time when the current operating mode is cooling mode. A second acquisition module acquires the outlet temperature of the first subcooling valve when the cooling operation time equals a first preset time. A third acquisition module acquires the outlet temperature of the second subcooling valve when the cooling operation time equals a second preset time. A reverse insertion determination module determines whether the main electronic expansion valve and the subcooling valve are reversed based on the outlet temperatures of the first and second subcooling valves. Thus, since the outlet temperature of the subcooling valve changes regularly depending on whether it is reversed or not during the cooling operation of the air conditioner, the outlet temperatures of the main electronic expansion valve and the subcooling valve can be automatically determined using the outlet temperatures of the first and second subcooling valves, eliminating the need for manual judgment and improving the efficiency of detecting whether the main electronic expansion valve and the subcooling valve are reversed.

[0063] Combination Figure 6 As shown, this disclosure provides an electronic device including a processor 600 and a memory 601. Optionally, the device may further include a communication interface 602 and a bus 603. The processor 600, communication interface 602, and memory 601 can communicate with each other via the bus 603. The communication interface 602 can be used for information transmission. The processor 600 can call logical instructions in the memory 601 to execute the method for determining the reverse insertion of an expansion valve as described in the above embodiment.

[0064] Furthermore, the logic instructions in the aforementioned memory 601 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0065] The memory 601, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 600 executes functional applications and data processing by running the program instructions / modules stored in the memory 601, that is, it implements the method for determining the reverse insertion of the expansion valve in the above embodiments.

[0066] The memory 601 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the air conditioner, etc. Furthermore, the memory 601 may include high-speed random access memory and may also include non-volatile memory.

[0067] In some embodiments, the electronic device is an air conditioner or a fault detection device for an air conditioner.

[0068] The electronic device using this embodiment acquires the current operating mode. When the current operating mode is cooling mode, the cumulative cooling operation time is calculated. If the cooling operation time equals a first preset time, the outlet temperature of the first subcooling valve is acquired. If the cooling operation time equals a second preset time, the outlet temperature of the second subcooling valve is acquired. The main electronic expansion valve and the subcooling valve are determined to be reversed based on the first and second subcooling valve outlet temperatures. Thus, since the outlet temperature of the subcooling valve changes regularly depending on whether the main electronic expansion valve and the subcooling valve are reversed during air conditioning operation, the first and second subcooling valve outlet temperatures can automatically determine whether the main electronic expansion valve and the subcooling valve are reversed without manual judgment, improving the efficiency of detecting whether the main electronic expansion valve and the subcooling valve are reversed.

[0069] This disclosure provides a storage medium storing program instructions, which, when executed, perform the aforementioned method for determining the reverse insertion of the expansion valve.

[0070] This disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the above-described method for determining the reverse insertion of an expansion valve.

[0071] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0072] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer air conditioner (which may be a personal computer, an air conditioner, or a network air conditioner, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0073] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or air conditioning system that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0074] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0075] The methods and products disclosed in the embodiments herein (including but not limited to devices, air conditioners, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0076] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A method for determining if an expansion valve is inserted in reverse, characterized in that, include: Get the current operating mode; When the current operating mode is cooling operating mode, the cumulative cooling operating time is calculated. When the cooling operation time is equal to the first preset time, the outlet temperature of the first subcooling valve is obtained; When the cooling operation time is equal to the second preset time, the outlet temperature of the second subcooling valve is obtained; Determine whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperature of the first subcooling valve and the outlet temperature of the second subcooling valve. The determination of whether the main electronic expansion valve and the subcooling valve are inserted in reverse, based on the outlet temperatures of the first and second subcooling valves, includes: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves; determining that the main electronic expansion valve and the subcooling valve are inserted in reverse if the first temperature difference is less than or equal to a first preset temperature difference; the first preset duration is less than a preset subcooling valve opening duration, and the second preset duration is greater than a preset subcooling valve opening duration; the time interval from the start of the air conditioner's cooling operation mode to the opening of the subcooling valve is called the subcooling valve opening duration; The air conditioner includes a primary subcooling device and a secondary subcooling device. The primary subcooling device is used to perform a controlled primary subcooling of the refrigerant, and the secondary subcooling device is used to perform a controlled secondary subcooling of the refrigerant after the primary subcooling. The primary subcooling device includes a condenser, and the secondary subcooling device includes a plate heat exchanger and a subcooling valve. One end of the condenser is connected to one end of a fifth filter, the other end of the fifth filter 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 a refrigerant radiator, the other end of the refrigerant radiator is connected to one end of the subcooling valve and the second port of the plate heat exchanger, and the other end of the subcooling valve is connected to the third port of the plate heat exchanger.

2. The method according to claim 1, characterized in that, Determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves also includes: When the cooling operation duration is equal to the third preset duration, the pipeline pressure value is obtained; The main electronic expansion valve and the subcooling valve are determined to be inserted in reverse based on the pipeline pressure value, the outlet temperature of the first subcooling valve, and the outlet temperature of the second subcooling valve.

3. The method according to claim 2, characterized in that, The pipeline pressure value is the exhaust pipe pressure value; determining whether the main electronic expansion valve and the subcooling valve are reversed based on the pipeline pressure value, the outlet temperature of the first subcooling valve, and the outlet temperature of the second subcooling valve includes: Determine a first temperature difference between the outlet temperature of the first subcooling valve and the outlet temperature of the second subcooling valve; If the exhaust pipe pressure value is greater than the first preset pressure value and the first temperature difference value is less than or equal to the first preset temperature difference value, it is determined that the main electronic expansion valve and the subcooling valve are inserted in reverse.

4. The method according to claim 2, characterized in that, The pipeline pressure value is the suction pipe pressure value; determining whether the main electronic expansion valve and the subcooling valve are reversed based on the pipeline pressure value, the outlet temperature of the first subcooling valve, and the outlet temperature of the second subcooling valve includes: Determine a first temperature difference between the outlet temperature of the first subcooling valve and the outlet temperature of the second subcooling valve; If the suction pipe pressure is less than the second preset pressure and the first temperature difference is less than or equal to the first preset temperature difference, it is determined that the main electronic expansion valve and the subcooling valve are reversed.

5. The method according to claim 1, characterized in that, Determining whether the main electronic expansion valve and the subcooling valve are inserted in reverse based on the outlet temperatures of the first and second subcooling valves also includes: When the cooling operation time is equal to the fourth preset time, the condenser outlet temperature and the main electronic expansion valve outlet temperature are obtained; The main electronic expansion valve and the subcooling valve are determined to be inserted in reverse based on the condenser outlet temperature, the main electronic expansion valve outlet temperature, the first subcooling valve outlet temperature, and the second subcooling valve outlet temperature.

6. The method according to claim 5, characterized in that, Determining whether the main electronic expansion valve and the subcooling valve are reversed based on the condenser outlet temperature, the first subcooling valve outlet temperature, and the second subcooling valve outlet temperature includes: Determine a first temperature difference between the outlet temperature of the first subcooling valve and the outlet temperature of the second subcooling valve; Determine a second temperature difference between the condenser outlet temperature and the main electronic expansion valve outlet temperature; If the first temperature difference is less than or equal to the first preset temperature difference, and the second temperature difference is greater than or equal to the second preset temperature difference, it is determined that the main electronic expansion valve and the subcooling valve are inserted in reverse.

7. A device for determining the reverse insertion of an expansion valve, characterized in that, include: The first acquisition module is configured to acquire the current running mode; The timing module is configured to accumulate the cooling operation time when the current operating mode is the cooling operation mode; The second acquisition module is configured to acquire the outlet temperature of the first subcooling valve when the cooling operation duration is equal to the first preset duration. The third acquisition module is configured to acquire the outlet temperature of the second subcooling valve when the cooling operation duration is equal to the second preset duration. The reverse insertion determination module is configured to determine whether the main electronic expansion valve and the subcooling valve are reversed based on the outlet temperature of the first subcooling valve and the outlet temperature of the second subcooling valve. The reverse insertion determination module is configured to determine whether the main electronic expansion valve and the subcooling valve are reversed based on the outlet temperatures of the first and second subcooling valves in the following manner: determining a first temperature difference between the outlet temperatures of the first and second subcooling valves; determining that the main electronic expansion valve and the subcooling valve are reversed if the first temperature difference is less than or equal to a first preset temperature difference; the first preset duration is less than a preset subcooling valve opening duration, and the second preset duration is greater than a preset subcooling valve opening duration; the time interval from the start of the air conditioner's cooling operation mode to the opening of the subcooling valve is called the subcooling valve opening duration; The air conditioner includes a primary subcooling device and a secondary subcooling device. The primary subcooling device is used to perform a controlled primary subcooling of the refrigerant, and the secondary subcooling device is used to perform a controlled secondary subcooling of the refrigerant after the primary subcooling. The primary subcooling device includes a condenser, and the secondary subcooling device includes a plate heat exchanger and a subcooling valve. One end of the condenser is connected to one end of a fifth filter, the other end of the fifth filter 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 a refrigerant radiator, the other end of the refrigerant radiator is connected to one end of the subcooling valve and the second port of the plate heat exchanger, and the other end of the subcooling valve is connected to the third port of the plate heat exchanger.

8. An electronic device comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to, when executing the program instructions, perform the method for determining the reverse insertion of the expansion valve as described in any one of claims 1 to 6.

9. A storage medium storing program instructions, characterized in that, When the program instructions are executed, they perform the method for determining the reverse insertion of the expansion valve as described in any one of claims 1 to 6.

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