Air conditioner control method and device, air conditioner and storage medium

Abstract

The application relates to the technical field of air conditioner control, and specifically provides an air conditioner control method and device, an air conditioner and a storage medium, the method comprising the following steps: acquiring a first indoor coil temperature; controlling the air conditioner to run a defrosting mode based on the first indoor coil temperature; acquiring an oil temperature superheat degree of a compressor; and adjusting the opening degree of an electronic expansion valve based on the oil temperature superheat degree. According to the application, the first indoor coil temperature is acquired first, and the air conditioner is controlled to run the defrosting mode based on the first indoor coil temperature; after the air conditioner runs the defrosting mode, the oil temperature superheat degree of the compressor is acquired, and the opening degree of the electronic expansion valve is adjusted according to the oil temperature superheat degree, so that the evaporation effect of refrigerant can be effectively improved, the problem that a large amount of refrigerant which has not completed evaporation flows into the compressor to cause the oil viscosity of the compressor to be reduced can be avoided, the situation that the crankshaft is seriously abraded or the motor is damaged can be prevented, and the service life of the compressor is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioner control, and specifically provides an air conditioner control method and device, an air conditioner and a storage medium. BACKGROUND

[0002] The compressor oil of an air conditioner plays a role of lubrication and cooling. However, when the oil amount in the compressor is insufficient or the oil viscosity is not enough, crankshaft wear, motor damage and other problems are easily caused, affecting the service life of the compressor. For example, when the air conditioner runs in a defrosting mode, the unit is converted from a heating mode to a refrigerating mode, and the indoor fan stops running. At this time, the refrigerant cannot complete evaporation in the indoor heat exchanger, resulting in a large amount of liquid refrigerant flowing back to the compressor and dissolving into the compressor oil. The compressor oil is diluted by the refrigerant, the oil viscosity of the compressor oil decreases, the oil film strength is not enough, and the crankshaft may be severely worn, the motor may be burned, and other situations may occur.

[0003] Correspondingly, there is a need in the art for a new air conditioner control scheme to solve the above problems. SUMMARY

[0004] In order to overcome the above defects, the present application is proposed to provide a solution or at least partial solution to the above technical problems.

[0005] In a first aspect, the present application provides an air conditioner control method, comprising:

[0006] obtaining a first indoor coil temperature;

[0007] controlling the air conditioner to run in a defrosting mode based on the first indoor coil temperature;

[0008] obtaining an oil temperature superheat degree of a compressor;

[0009] adjusting the opening degree of an electronic expansion valve based on the oil temperature superheat degree.

[0010] In one technical solution, the controlling the air conditioner to run in a defrosting mode based on the first indoor coil temperature comprises:

[0011] controlling the air conditioner to run in a defrosting mode when the first indoor coil temperature is greater than a preset temperature threshold.

[0012] In one technical solution, the controlling the air conditioner to run in a defrosting mode based on the first indoor coil temperature comprises:

[0013] controlling the indoor fan of the air conditioner to stop running when the first indoor coil temperature is less than or equal to a preset temperature threshold.

[0014] obtaining a second indoor coil temperature;

[0015] In a case where the second indoor coil temperature and / or the shutdown duration of the indoor fan meets a preset condition, the air conditioner is controlled to run a defrosting mode.

[0016] In one technical solution, the second indoor coil temperature and / or the shutdown duration of the indoor fan meets a preset condition, including:

[0017] The second indoor coil temperature is greater than a preset temperature threshold; and / or

[0018] The shutdown duration of the indoor fan reaches a preset shutdown duration.

[0019] In one technical solution, the opening degree of the electronic expansion valve is adjusted based on the oil temperature superheat, including:

[0020] In a case where the oil temperature superheat is greater than or equal to a first oil temperature threshold, the opening degree of the electronic expansion valve is adjusted to a first opening degree.

[0021] In one technical solution, the opening degree of the electronic expansion valve is adjusted based on the oil temperature superheat, including:

[0022] In a case where the oil temperature superheat is less than a second oil temperature threshold, the opening degree of the electronic expansion valve is adjusted to a second opening degree.

[0023] In one technical solution, the opening degree of the electronic expansion valve is adjusted based on the oil temperature superheat, including:

[0024] In a case where the oil temperature superheat is less than the first oil temperature threshold and greater than or equal to the second oil temperature threshold, a preset corresponding relationship is obtained, where the preset corresponding relationship is a corresponding relationship between the oil temperature superheat and the opening degree of the electronic expansion valve;

[0025] A third opening degree is determined based on the oil temperature superheat and the preset corresponding relationship;

[0026] The opening degree of the electronic expansion valve is adjusted based on the third opening degree.

[0027] In a second aspect, the present application provides an air conditioner control device, which comprises:

[0028] A first obtaining module is configured to obtain a first indoor coil temperature.

[0029] A control module is configured to control the air conditioner to run a defrosting mode based on the first indoor coil temperature.

[0030] A second obtaining module is configured to obtain an oil temperature superheat of a compressor.

[0031] An adjusting module is configured to adjust an opening degree of an electronic expansion valve based on the oil temperature superheat.

[0032] In a third aspect, an air conditioner is provided, comprising at least one processor and at least one storage device, the storage device being adapted to store a plurality of program codes, the program codes being adapted to be loaded and run by the processor to execute the air conditioner control method of any one of the technical solutions of the air conditioner control method described above.

[0033] In a fourth aspect, a computer readable storage medium is provided, wherein a plurality of program codes are stored, the program codes being adapted to be loaded and run by a processor to execute the air conditioner control method of any one of the technical solutions of the air conditioner control method described above.

[0034] The one or more technical solutions of the present application have at least one or more of the following beneficial effects:

[0035] The present application provides an air conditioner control method, which comprises: obtaining a first indoor coil temperature; controlling the air conditioner to run a defrosting mode based on the first indoor coil temperature; obtaining an oil temperature superheat degree of a compressor; adjusting the opening degree of an electronic expansion valve based on the oil temperature superheat degree. The present application first obtains the first indoor coil temperature, and controls the air conditioner to run the defrosting mode based on the first indoor coil temperature. After the air conditioner runs the defrosting mode, the oil temperature superheat degree of the compressor is obtained, and the opening degree of the electronic expansion valve is adjusted according to the oil temperature superheat degree. This can effectively improve the evaporation effect of the refrigerant, avoid the problem that the refrigerant that has not completed evaporation flows into the compressor, causing the oil viscosity of the compressor to decrease, and further prevent the possible serious crankshaft wear or motor damage, thereby prolonging the service life of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0036] The disclosure of the present application will become more apparent with reference to the drawings. It is readily understood by those skilled in the art that the drawings are merely for the purpose of illustration and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the figures are used to represent similar components, wherein:

[0037] Figure 1 is a main step flow diagram of an air conditioner control method according to an embodiment of the present application;

[0038] Figure 2 is a complete step flow diagram of an air conditioner control method according to an embodiment of the present application;

[0039] Figure 3 is a structure diagram of an air conditioner system when heating according to an embodiment of the present application;

[0040] Figure 4 is a structure diagram of an air conditioner system when cooling according to an embodiment of the present application;

[0041] Figure 5 Fig. 1 is a schematic diagram of a main structure block of an air conditioner control device according to an embodiment of the present application;

[0042] Figure 6 Fig. 2 is a schematic diagram of an air conditioner according to an embodiment of the present application.

[0043] List of reference signs

[0044] 11: first obtaining module; 12: control module; 13: second obtaining module; 14: adjusting module; 31: compressor; 32: four-way valve; 33: indoor unit; 34: indoor coil; 35: indoor fan; 36: electronic expansion valve; 37: outdoor unit; 38: outdoor coil; 39: outdoor fan. DETAILED DESCRIPTION

[0045] Some embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the scope of protection of the present application.

[0046] In the description of the present application, "module" and "processor" can include hardware, software or a combination of both. A module can include hardware circuit, various suitable sensors, communication port, memory, and can also include software part such as program code, and can be a combination of software and hardware. The processor can be a central processing unit, microprocessor, image processor, digital signal processor or any other suitable processor. The processor has data and / or signal processing function. The processor can be implemented in software, hardware or a combination of both. The non-transitory computer readable storage medium includes any suitable medium that can store program code, such as magnetic disk, hard disk, optical disk, flash memory, read-only memory, random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B or both A and B. The term "at least one of A or B" or "at least one of A and B" has similar meaning as "A and / or B", and can include only A, only B or both A and B. The singular form of the term "one", "this" can also include plural forms.

[0047] ​The compressor oil of an air conditioner plays a role of lubrication and cooling, but when the oil amount in the compressor is insufficient or the oil viscosity is not enough, crankshaft wear, motor damage and other problems are easily caused, affecting the service life of the compressor. For example, when the air conditioner is running in the defrosting mode, the unit is converted from the heating mode to the refrigeration mode, and the indoor fan stops running. At this time, the refrigerant cannot complete evaporation in the indoor heat exchanger, resulting in a large amount of liquid refrigerant flowing back to the compressor and dissolving into the compressor oil. The compressor oil is diluted by the refrigerant, the oil viscosity of the compressor oil is reduced, the oil film strength is not enough, and the crankshaft may be severely worn, the motor may be burned, and other situations may occur.

[0048] Therefore, the present application provides an air conditioner control method, which comprises: obtaining a first indoor coil temperature; controlling the air conditioner to run in a defrosting mode based on the first indoor coil temperature; obtaining an oil temperature superheat degree of a compressor; and adjusting an opening degree of an electronic expansion valve based on the oil temperature superheat degree. The present application first obtains the first indoor coil temperature, and controls the air conditioner to run in the defrosting mode based on the first indoor coil temperature. After the air conditioner runs in the defrosting mode, the oil temperature superheat degree of the compressor is obtained, and the opening degree of the electronic expansion valve is adjusted according to the oil temperature superheat degree. The evaporation effect of the refrigerant can be effectively improved, the problem of oil viscosity reduction of the compressor caused by the refrigerant that does not complete evaporation flowing into the compressor is avoided, the situation of possible severe wear of the crankshaft or damage of the motor is prevented, and the service life of the compressor is prolonged.

[0049] Referring to the accompanying drawings Figure 1 , Figure 1 is a main step flow schematic diagram of an air conditioner control method according to an embodiment of the present application.

[0050] As Figure 1 shown, the air conditioner control method of the embodiment of the present application mainly comprises the following steps S100-S400.

[0051] Step S100: obtaining a first indoor coil temperature.

[0052] In the embodiment, before the air conditioner meets the defrosting condition and starts to run in the defrosting mode, the first indoor coil temperature is collected by an indoor coil temperature detection device of the air conditioner. The indoor coil temperature detection device can be an indoor coil temperature sensor.

[0053] Step S200: controlling the air conditioner to run in the defrosting mode based on the first indoor coil temperature.

[0054] In the embodiment, the air conditioner is controlled to run in the defrosting mode based on the first indoor coil temperature. Specifically, when the first indoor coil temperature is greater than a preset temperature threshold, the air conditioner is controlled to run in the defrosting mode.

[0055] Step S300: obtaining an oil temperature superheat degree of a compressor.

[0056] In this embodiment, the compressor oil temperature collected by the oil temperature sensor arranged on the compressor is first acquired, then the pressure on the high-pressure side of the air conditioning system is collected by the pressure sensor, and the corresponding refrigerant saturation temperature is acquired according to the pressure on the high-pressure side of the air conditioning system, and then the oil temperature superheat is determined according to the compressor oil temperature, the refrigerant saturation temperature and the oil temperature superheat calculation formula of the compressor, wherein the oil temperature superheat calculation formula is as follows:

[0057] Oil temperature superheat = Compressor oil temperature - Refrigerant saturation temperature.

[0058] Step S400: Adjust the opening degree of the electronic expansion valve based on the oil temperature superheat.

[0059] Based on the above steps S100-S400, the first indoor coil temperature is first acquired, and the air conditioner is controlled to run in the defrosting mode based on the first indoor coil temperature. After the air conditioner runs in the defrosting mode, the oil temperature superheat of the compressor is acquired, and the opening degree of the electronic expansion valve is adjusted according to the oil temperature superheat, which can effectively improve the evaporation effect of the refrigerant, avoid the problem that the refrigerant that has not completed evaporation flows into the compressor to cause the oil viscosity of the compressor to decrease, and further prevent the possible serious crankshaft wear or motor damage, thereby prolonging the service life of the compressor.

[0060] The above steps S100-S400 will be further described below.

[0061] For step S100, in an embodiment, the first indoor coil temperature is acquired.

[0062] Specifically, before the air conditioner meets the defrosting condition and starts to run in the defrosting mode, the first indoor coil temperature is collected by the indoor coil temperature detection device of the air conditioner, wherein the indoor coil temperature detection device can be an indoor coil temperature sensor. The defrosting condition can be that when the outdoor coil temperature is less than a preset temperature value and the duration of the outdoor coil temperature being less than the preset temperature value reaches a preset time length, for example, 2 minutes, and the running time of the heating mode of the air conditioner is greater than 40 minutes, it is determined that the air conditioner meets the defrosting condition.

[0063] It can be understood that in this embodiment, the indoor coil temperature reflects the temperature of the indoor heat exchanger. When the temperature of the indoor heat exchanger is too low, the refrigerant cannot complete evaporation in the indoor heat exchanger, which will cause a large amount of liquid refrigerant to flow back into the compressor. When the refrigerant dissolves into the compressor oil, the oil viscosity of the compressor oil decreases, which can cause problems such as crankshaft wear and motor burnout. Therefore, before running in the defrosting mode, the first indoor coil temperature is first collected to determine whether the temperature of the indoor heat exchanger meets the condition for running in the defrosting mode.

[0064] The above is a description of step S100, and the following is a further description of step S200.

[0065] For step S200, in an embodiment, the controlling the air conditioner to run the defrosting mode based on the first indoor coil temperature comprises: in a case where the first indoor coil temperature is greater than a preset temperature threshold, controlling the air conditioner to run the defrosting mode.

[0066] Specifically, in a case where the first indoor coil temperature is greater than a preset temperature threshold, it is determined that the temperature of the indoor unit heat exchanger can enable the refrigerant to complete evaporation, and a large amount of liquid refrigerant will not flow back into the compressor, and then the air conditioner is controlled to run the defrosting mode. Based on the first indoor coil temperature, the temperature of the indoor unit heat exchanger is determined to enable the refrigerant to complete evaporation, and then the air conditioner is controlled to run the defrosting mode, which can avoid the problem of a large amount of liquid refrigerant flowing back into the compressor, causing the oil viscosity of the compressor oil to decrease, and further causing the crankshaft to wear and the motor to be damaged.

[0067] In an embodiment, the controlling the air conditioner to run the defrosting mode based on the first indoor coil temperature comprises: in a case where the first indoor coil temperature is less than or equal to a preset temperature threshold, controlling the indoor fan of the air conditioner to stop; acquiring a second indoor coil temperature; and in a case where the second indoor coil temperature and / or the stop time length of the indoor fan satisfies a preset condition, controlling the air conditioner to run the defrosting mode.

[0068] Specifically, in a case where the first indoor coil temperature is less than or equal to a preset temperature threshold, it is determined that the temperature of the indoor unit heat exchanger cannot enable the refrigerant to complete evaporation, and a large amount of liquid refrigerant may flow back into the compressor. In order to improve the evaporation temperature of the refrigerant, the indoor fan is controlled to stop, which can improve the pressure and temperature of the refrigerant, and then the second indoor coil temperature is acquired, and the air conditioner is controlled to run the defrosting mode based on the second indoor coil temperature and / or the stop time length of the indoor fan.

[0069] When it is detected that the first indoor coil temperature is less than or equal to a preset temperature threshold, the indoor fan is controlled to stop, which can effectively improve the evaporation temperature of the refrigerant, avoid the problem that the refrigerant cannot complete evaporation due to too low temperature, and acquire the second indoor coil temperature after the indoor fan stops, and then control the air conditioner to run the defrosting mode based on the second indoor coil temperature and / or the stop time length of the indoor fan, so as to avoid running the defrosting mode when the second indoor coil temperature is low, causing the refrigerant to fail to complete evaporation in the indoor unit heat exchanger, a large amount of liquid refrigerant flowing back into the compressor, the refrigerant dissolving into the compressor oil, and causing the crankshaft of the compressor to wear and the motor to be damaged.

[0070] In one embodiment, the second indoor coil temperature and / or the shutdown duration of the indoor fan satisfies the preset condition, including: the second indoor coil temperature is greater than a preset temperature threshold; and / or the shutdown duration of the indoor fan reaches a preset shutdown duration.

[0071] Specifically, when the second indoor coil temperature is greater than the preset temperature threshold, it is determined that the second indoor coil temperature satisfies the preset condition, and / or when the shutdown duration of the indoor fan reaches the preset shutdown duration, it is determined that the shutdown duration of the indoor fan satisfies the preset condition. When the second indoor coil temperature is greater than the preset temperature threshold, it is determined that the temperature of the indoor heat exchanger can make the refrigerant complete evaporation, and a large amount of liquid refrigerant will not flow back into the compressor, and the shutdown of the indoor fan will increase the pressure and evaporation temperature of the refrigerant. Therefore, the shutdown duration of the indoor fan can also reflect that the evaporation temperature of the refrigerant has reached the preset condition.

[0072] In this embodiment, controlling the air conditioner to run the defrosting mode can be to control the four-way valve to reverse, so that the air conditioner enters the defrosting stage.

[0073] The above is a description of step S200, and the following will further describe step S300.

[0074] For step S300, in one embodiment, the oil temperature superheat degree of the compressor is obtained.

[0075] Specifically, first, the compressor oil temperature collected by the oil temperature sensor arranged on the compressor is obtained, then the pressure of the high-pressure side of the air conditioning system is obtained through the pressure sensor, and the corresponding refrigerant saturation temperature is obtained based on the preset corresponding relationship between the pressure and the refrigerant saturation temperature and the pressure of the high-pressure side of the air conditioning system. The preset corresponding relationship between the pressure and the refrigerant saturation temperature is obtained through offline experimental detection, and each pressure corresponds to a refrigerant saturation temperature during the detection process. Specifically, it can be stored in a database in the form of a table or other forms. Further, the oil temperature superheat degree is determined according to the compressor oil temperature, the saturation temperature of the refrigerant, and the oil temperature superheat degree calculation formula of the compressor, wherein the oil temperature superheat degree calculation formula is as follows:

[0076] Oil temperature superheat degree = compressor oil temperature - refrigerant saturation temperature.

[0077] The above is a description of step S300, and the following will further describe step S400.

[0078] For step S400, in one embodiment, the opening degree of the electronic expansion valve is adjusted based on the oil temperature superheat degree, including: in the case where the oil temperature superheat degree is greater than or equal to a first oil temperature threshold, the opening degree of the electronic expansion valve is adjusted to a first opening degree.

[0079] Specifically, after controlling the air conditioner to run the defrosting mode, the opening degree of the electronic expansion valve is determined based on the obtained oil temperature superheat degree. In a case where the oil temperature superheat degree is greater than or equal to a first oil temperature threshold, the opening degree of the electronic expansion valve is adjusted to a first opening degree.

[0080] It can be understood that the greater the opening degree of the electronic expansion valve, the more refrigerant enters the compressor, which in turn causes the oil temperature of the compressor to drop, and the risk of oil shortage of the compressor occurs. Therefore, when the oil temperature superheat degree is greater than or equal to the first oil temperature threshold, the opening degree of the electronic expansion valve is correspondingly increased.

[0081] In a specific embodiment, the first oil temperature threshold can be set to 15℃, and the first opening degree can be 300 steps (pls). When the oil temperature superheat degree is greater than or equal to 15℃, the opening degree of the electronic expansion valve is adjusted to 300 steps (pls).

[0082] In an embodiment, the adjusting the opening degree of the electronic expansion valve based on the oil temperature superheat degree comprises: in a case where the oil temperature superheat degree is less than a second oil temperature threshold, adjusting the opening degree of the electronic expansion valve to a second opening degree.

[0083] Specifically, after controlling the air conditioner to run the defrosting mode, the opening degree of the electronic expansion valve is determined based on the obtained oil temperature superheat degree. In a case where the oil temperature superheat degree is less than a second oil temperature threshold, the opening degree of the electronic expansion valve is adjusted to a second opening degree.

[0084] It can be understood that the greater the opening degree of the electronic expansion valve, the more refrigerant enters the compressor, which in turn causes the oil temperature of the compressor to drop, and the risk of oil shortage of the compressor occurs. Therefore, when the oil temperature superheat degree is less than the second oil temperature threshold, the opening degree of the electronic expansion valve is correspondingly decreased. By adjusting the opening degree of the electronic expansion valve, the flow of refrigerant can be effectively reduced, the oil temperature of the compressor can be improved, and the situation of insufficient oil temperature of the compressor or oil shortage of the compressor can be further avoided, thereby improving the reliability of the compressor.

[0085] In a specific embodiment, the second oil temperature threshold can be set to 10℃, and the second opening degree can be 125 steps (pls). When the oil temperature superheat degree is less than 10℃, the opening degree of the electronic expansion valve is adjusted to 125 steps (pls).

[0086] In an embodiment, the adjusting the opening degree of the electronic expansion valve based on the oil temperature superheat degree comprises: in a case where the oil temperature superheat degree is less than a first oil temperature threshold and greater than or equal to a second oil temperature threshold, obtaining a preset corresponding relationship, wherein the preset corresponding relationship is a corresponding relationship between the oil temperature superheat degree and the opening degree of the electronic expansion valve; determining a third opening degree based on the oil temperature superheat degree and the corresponding relationship; and adjusting the opening degree of the electronic expansion valve based on the third opening degree.

[0087] Specifically, in a case where the oil temperature superheat is less than the first oil temperature threshold and greater than or equal to the second oil temperature threshold, a preset corresponding relationship is obtained, where the preset corresponding relationship is a corresponding relationship between the oil temperature superheat and the electronic expansion valve opening degree, and a third opening degree is determined according to the oil temperature superheat and the preset corresponding relationship, and then the opening degree of the electronic expansion valve is adjusted according to the third opening degree.

[0088] It can be understood that the preset corresponding relationship is a linear relationship between the oil temperature superheat and the electronic expansion valve opening degree obtained by experimental detection in advance, and each oil temperature superheat corresponds to an electronic expansion valve opening degree in the detection process, which can be stored in a database in the form of a table or other forms.

[0089] Adjusting the opening degree of the electronic expansion valve through the oil temperature superheat can effectively avoid the situation that the compressor oil temperature is insufficient or the compressor is out of oil due to excessive inflow of refrigerant caused by a large opening degree of the electronic expansion valve, prolongs the service life of the compressor, and improves the reliability of the compressor.

[0090] Referring to the accompanying Figure 2 , Figure 2 is a complete step flow diagram of an air conditioner control method according to an embodiment of the present application.

[0091] As Figure 2 shown, the air conditioner control method of an embodiment of the present application includes the following steps:

[0092] Step S01: The air conditioner is in heating operation, and the defrosting condition is met before the defrosting mode is started. Specifically, when the outdoor coil temperature is less than a preset temperature value, the duration that the outdoor coil temperature is less than the preset temperature value reaches a preset time, for example, 2 minutes, and the running time of the air conditioner in the heating mode is greater than 40 minutes, it is determined that the air conditioner meets the defrosting condition.

[0093] Step S02: Obtain the first indoor coil temperature. In this embodiment, the first indoor coil temperature is collected by an indoor coil temperature detection device of the air conditioner, where the indoor coil temperature detection device can be an indoor coil temperature sensor.

[0094] Step S03: Determine whether the first indoor coil temperature is greater than a preset temperature threshold, if yes, execute step S07; if no, execute step S04. Specifically, in a case where the first indoor coil temperature is greater than the preset temperature threshold, the air conditioner is controlled to run in the defrosting mode; in a case where the first indoor coil temperature is less than the preset temperature threshold, step S04 is executed.

[0095] Step S04: Control the indoor fan of the air conditioner to stop.

[0096] Step S05: Obtain the second indoor coil temperature.

[0097] Step S06: Determine whether the second indoor coil temperature is greater than a preset temperature threshold and / or whether the indoor fan shutdown duration reaches a preset duration. If yes, execute step S07; if no, return to step S05. Specifically, when the second indoor coil temperature is greater than the preset temperature threshold and / or the indoor fan shutdown duration reaches the preset shutdown duration, control the air conditioner to run the defrost mode; otherwise, return to step S05.

[0098] Step S07: Control the air conditioner to run the defrost mode. In this embodiment, controlling the air conditioner to run the defrost mode can be controlling the four-way valve to reverse, so that the air conditioner runs the defrost mode.

[0099] Step S08: Obtain the oil temperature superheat. Specifically, obtaining the oil temperature superheat of the compressor first obtains the compressor oil temperature collected by the oil temperature sensor of the compressor, then obtains the pressure at the high-pressure side of the air conditioning system collected by the pressure sensor, and obtains the corresponding refrigerant saturation temperature based on the pressure at the high-pressure side of the air conditioning system, and determines the oil temperature superheat by using the oil temperature superheat calculation formula, which is as follows:

[0100] Oil temperature superheat = Compressor oil temperature - Refrigerant saturation temperature.

[0101] Step S09: In the case where the oil temperature superheat is greater than or equal to 15°C, execute step S10.

[0102] Step S10: Adjust the opening degree of the electronic expansion valve to 300 pls. Specifically, when the oil temperature superheat is greater than or equal to 15°C, adjust the opening degree of the electronic expansion valve to 300 pls.

[0103] Step S11: In the case where the oil temperature superheat is greater than or equal to 10°C and less than 15°C, execute step S12.

[0104] Step S12: Obtain a preset corresponding relationship. Specifically, in the case where the oil temperature superheat is less than 15°C and greater than or equal to 10°C, obtain a preset corresponding relationship, wherein the preset corresponding relationship is a corresponding relationship between the oil temperature superheat and the opening degree of the electronic expansion valve, which is a linear relationship between the oil temperature superheat and the opening degree of the electronic expansion valve, and each oil temperature superheat corresponds to an opening degree of the electronic expansion valve.

[0105] Step S13: Determine the opening degree of the electronic expansion valve based on the oil temperature superheat and the preset corresponding relationship.

[0106] Step S14: Adjust the electronic expansion valve according to the opening degree of the electronic expansion valve.

[0107] Step S15: In the case where the oil temperature superheat is less than 10°C, execute step S16.

[0108] Step S16: Adjust the opening of the electronic expansion valve to 125 steps (pls). Specifically, when the oil temperature superheat is <10°C, adjust the opening of the electronic expansion valve to 125 steps (pls).

[0109] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effects of the present invention, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of the present invention.

[0110] See appendix Figure 3 , Figure 3 This is a schematic diagram of the heating operation of an air conditioning system according to an embodiment of the present invention.

[0111] like Figure 3 As shown, the air conditioning system in this embodiment includes: compressor 31, four-way valve 32, indoor unit 33, indoor coil 34, indoor fan 35, electronic expansion valve 36, outdoor unit 37, outdoor coil 38, and outdoor fan 39.

[0112] During heating operation, the refrigerant first passes through the compressor 31 to become a high-pressure gas, then flows through the four-way valve 32 and then passes through the indoor unit 33 to condense and release heat to become a high-pressure liquid. The high-pressure liquid then passes through the electronic expansion valve 36 and becomes a low-temperature, low-pressure liquid. Then it passes through the outdoor unit 37 to evaporate and absorb heat to become a low-temperature, low-pressure gas, and finally returns to the compressor 31.

[0113] See appendix Figure 4 , Figure 4 This is a schematic diagram of the structure of an air conditioning system in cooling operation according to an embodiment of the present invention.

[0114] like Figure 4 As shown, the air conditioning system in this embodiment includes: compressor 31, four-way valve 32, indoor unit 33, indoor coil 34, indoor fan 35, electronic expansion valve 36, outdoor unit 37, outdoor coil 38, and outdoor fan 39.

[0115] During refrigeration operation, the refrigerant first passes through the compressor 31 to become a high-pressure gas, then flows through the four-way valve 32 and then through the outdoor unit 37 to condense and release heat to become a high-pressure liquid. Then the high-pressure liquid passes through the electronic expansion valve 36 and becomes a low-temperature, low-pressure liquid. Then it passes through the indoor unit 33 to evaporate and absorb heat to become a low-temperature, low-pressure gas, and finally returns to the compressor 31.

[0116] Furthermore, the present invention also provides an air conditioner control device.

[0117] See appendix Figure 5 , Figure 5is a main structural block diagram of an air conditioner control device according to an embodiment of the present application.

[0118] As shown in Figure 5 the air conditioner control device in the embodiment of the present application mainly comprises a first acquisition module 11, a control module 12, a second acquisition module 13 and an adjustment module 14. In some embodiments, one or more of the first acquisition module 11, the control module 12, the second acquisition module 13 and the adjustment module 14 can be combined together into one module. In some embodiments, the first acquisition module 11 can be configured to acquire a first indoor coil temperature. The control module 12 can be configured to control the air conditioner to run a defrosting mode based on the first indoor coil temperature. The second acquisition module 13 can be configured to acquire an oil temperature overheat degree of a compressor. The adjustment module 14 can be configured to adjust an opening degree of an electronic expansion valve based on the oil temperature overheat degree.

[0119] In one implementation, the description of the functions can be referred to the steps S100-S400.

[0120] The air conditioner control device described above is used to execute Figure 1 the embodiment of the air conditioner control method shown in the figure, the technical principles, the technical problems solved and the technical effects generated are similar, and the person skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related description of the air conditioner control device can refer to the content described in the embodiment of the air conditioner control method, which will not be repeated here.

[0121] The person skilled in the art can understand that all or part of the processes in the method of the above-mentioned embodiment of the present application can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable file or some intermediate form, etc. The computer readable storage medium can include any entity or device, medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium, etc. capable of carrying the computer program code. It should be noted that the content included in the computer readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to the legislation and patent practice, the computer readable storage medium does not include electric carrier signal and telecommunication signal.

[0122] Further, the present application also provides an air conditioner.

[0123] Referring to the drawings Figure 6 , Figure 6 is a structural schematic diagram of an air conditioner in an embodiment of the present application.

[0124] As Figure 6 shown, in an embodiment of the air conditioner according to the present application, the air conditioner comprises at least one processor 61 and a storage device 62, the storage device 62 can be configured to store a program for executing the air conditioner control method of the above-mentioned method embodiments, and the processor 61 can be configured to execute the program in the storage device 62, which includes but is not limited to the program for executing the air conditioner control method of the above-mentioned method embodiments. For the convenience of description, only the parts related to the embodiments of the present application are shown, and the specific technical details not disclosed are referred to the method part of the embodiments of the present application. The air conditioner can be an air conditioner device formed by various electronic devices.

[0125] Further, the present application also provides a computer readable storage medium. In an embodiment of the computer readable storage medium according to the present application, the computer readable storage medium can be configured to store a program for executing the air conditioner control method of the above-mentioned method embodiments, which can be loaded and run by a processor to realize the above-mentioned air conditioner control method. For the convenience of description, only the parts related to the embodiments of the present application are shown, and the specific technical details not disclosed are referred to the method part of the embodiments of the present application. The computer readable storage medium can be a storage device formed by various electronic devices, and optionally, the computer readable storage medium in the embodiments of the present application is a non-transitory computer readable storage medium.

[0126] Further, it should be understood that, since the setting of each module is only for illustrating the functional units of the device of the present application, the corresponding physical device of the module can be the processor itself, or a part of software, a part of hardware, or a part of combination of software and hardware in the processor. Therefore, the number of each module in the figure is only illustrative.

[0127] Those skilled in the art can understand that each module in the device can be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solution to deviate from the principles of the present application, and therefore, the technical solution after splitting or combining will fall within the protection scope of the present application.

[0128] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the present application, and the technical solution after the changes or replacements will fall within the protection scope of the present application.

Claims

1. An air conditioner control method characterized by comprising: The method comprises: obtaining a first indoor coil temperature; controlling the air conditioner to run a defrosting mode based on the first indoor coil temperature; obtaining an oil temperature superheat degree of a compressor; adjusting an opening degree of an electronic expansion valve based on the oil temperature superheat degree; the controlling the air conditioner to run a defrosting mode based on the first indoor coil temperature comprises: in a case where the first indoor coil temperature is greater than a preset temperature threshold, controlling the air conditioner to run a defrosting mode; in a case where the first indoor coil temperature is less than or equal to a preset temperature threshold, controlling an indoor fan of the air conditioner to stop; obtaining a second indoor coil temperature; and in a case where the second indoor coil temperature and / or a stop time length of the indoor fan meets a preset condition, controlling the air conditioner to run a defrosting mode.

2. The air conditioner control method according to claim 1, characterized by, the second indoor coil temperature and / or the stop time length of the indoor fan meets a preset condition comprises: the second indoor coil temperature is greater than a preset temperature threshold; and / or the stop time length of the indoor fan reaches a preset stop time length.

3. The air conditioner control method of claim 1, wherein, the adjusting the opening degree of the electronic expansion valve based on the oil temperature superheat degree comprises: in a case where the oil temperature superheat degree is greater than or equal to a first oil temperature threshold, adjusting the opening degree of the electronic expansion valve to a first opening degree.

4. The air conditioner control method of claim 1, wherein, the adjusting the opening degree of the electronic expansion valve based on the oil temperature superheat degree comprises: in a case where the oil temperature superheat degree is less than a second oil temperature threshold, adjusting the opening degree of the electronic expansion valve to a second opening degree.

5. The air conditioner control method of claim 1, wherein, the adjusting the opening degree of the electronic expansion valve based on the oil temperature superheat degree comprises: in a case where the oil temperature superheat degree is less than a first oil temperature threshold and greater than or equal to a second oil temperature threshold, obtaining a preset corresponding relationship, wherein the preset corresponding relationship is a corresponding relationship between the oil temperature superheat degree and the opening degree of the electronic expansion valve; determining a third opening degree based on the oil temperature superheat degree and the preset corresponding relationship; adjusting the opening degree of the electronic expansion valve based on the third opening degree.

6. An air conditioner control device characterized by comprising: The device comprises: a first obtaining module configured to obtain a first indoor coil temperature; a control module configured to control the air conditioner to run a defrosting mode based on the first indoor coil temperature; a second obtaining module configured to obtain an oil temperature superheat degree of a compressor; an adjusting module configured to adjust an opening degree of an electronic expansion valve based on the oil temperature superheat degree; the control module is further configured to: in a case where the first indoor coil temperature is greater than a preset temperature threshold, control the air conditioner to run a defrosting mode; in a case where the first indoor coil temperature is less than or equal to a preset temperature threshold, control an indoor fan of the air conditioner to stop; obtain a second indoor coil temperature; and in a case where the second indoor coil temperature and / or a stop time length of the indoor fan meets a preset condition, control the air conditioner to run a defrosting mode.

7. An air conditioner comprising at least one processor and at least one storage device adapted to store a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to execute the air conditioner control method of any one of claims 1 to 5.

8. A computer readable storage medium having stored therein a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to execute the air conditioner control method of any one of claims 1 to 5.

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