Air conditioner, control method thereof and storage medium

Abstract

The invention discloses an air conditioner, a control method of the air conditioner and a storage medium. The air conditioner comprises a compressor, a reversing assembly, an indoor heat exchanger, a one-way throttle valve, a refrigerant radiating pipe, an electronic expansion valve and an outdoor heat exchanger, the indoor heat exchanger, the one-way throttle valve, the refrigerant radiating pipe, the electronic expansion valve and the outdoor heat exchanger are sequentially connected, and the refrigerant radiating pipe is arranged to be in heat exchange connection with a heating component. The one-way throttle valve is in a throttling state; in the second mode, the reversing assembly controls the refrigerant to flow from the indoor heat exchanger to the outdoor heat exchanger, and the electronic expansion valve operates at the throttling opening degree; in the preset defrosting mode, the reversing assembly controls a refrigerant to flow from the indoor heat exchanger to the outdoor heat exchanger, and the electronic expansion valve operates at the opening degree larger than the throttling opening degree. The invention aims to meet the throttling requirements under different working conditions and realize non-reversing defrosting at low cost so as to improve the indoor comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an air conditioner, a control method of the air conditioner, and a storage medium. Background Art

[0002] During the operation of components such as the main control board in an air conditioner, heat generation is serious. Currently, generally, a refrigerant heat dissipation pipe is arranged in the refrigerant system. The refrigerant heat dissipation pipe can utilize the refrigerant after condensation by the condenser to exchange heat with heat-generating components such as the main control board to dissipate heat from the heat-generating components. Throttling components will be arranged at both ends of the refrigerant heat dissipation pipe to meet the throttling requirements under different working conditions and reduce the risk of condensation of the refrigerant heat dissipation pipe.

[0003] However, when this type of air conditioner needs to defrost during heating operation, it is necessary to switch the refrigerant flow direction through the commutation of the commutation component to switch the air conditioner to refrigeration operation to defrost the frosted heat exchanger. However, this will cause fluctuations in the indoor environmental temperature and generate noise, affecting user comfort. Summary of the Invention

[0004] The main purpose of the present invention is to provide a control method of an air conditioner, an air conditioner, and a storage medium, aiming to meet the throttling requirements under different working conditions and achieve non-commutation defrosting at low cost to improve indoor comfort.

[0005] To achieve the above object, the present invention provides an air conditioner, which includes a compressor, a commutation component, and an indoor heat exchanger, a one-way throttle valve, a refrigerant heat dissipation pipe, an electronic expansion valve, and an outdoor heat exchanger that are connected in sequence. The refrigerant heat dissipation pipe is arranged to be heat-exchanged and connected with a heat-generating component. The one-way throttle valve is arranged to throttle unidirectionally when the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger. The indoor heat exchanger, the compressor, and the outdoor heat exchanger are all connected to the commutation component;

[0006] The air conditioner has a first mode, a second mode, and a preset defrost mode.

[0007] In the first mode, the commutation component controls the refrigerant to flow from the outdoor heat exchanger to the indoor heat exchanger, and the one-way throttle valve is in a throttling state;

[0008] In the second mode, the commutation component controls the refrigerant to flow from the indoor heat exchanger to the outdoor heat exchanger, and the electronic expansion valve operates at a throttling opening;

[0009] In the preset defrost mode, the commutation component controls the refrigerant to flow from the indoor heat exchanger to the outdoor heat exchanger, and the electronic expansion valve operates at an opening greater than the throttling opening.

[0010] Optionally, the throttling effect of the one-way throttle valve increases with the increase of the pressure difference at both ends of the one-way throttle valve.

[0011] Optionally, the electronic expansion valve is provided with at least a first opening range and a second opening range, the opening of the first opening range is smaller than that of the second opening range, and the change rate of the flow rate of the electronic expansion valve with respect to the change in the opening when the opening is within the first opening range is smaller than the change rate of the flow rate of the electronic expansion valve with respect to the change in the opening when the opening is within the second opening range.

[0012] To achieve the above object, the present application further provides a control method for an air conditioner. Based on the air conditioner as described above, the control method for the air conditioner includes:

[0013] Controlling the air conditioner to operate in the second mode;

[0014] When the air conditioner satisfies the first defrosting condition, controlling the air conditioner to start the preset defrosting mode.

[0015] Optionally, the first defrosting condition includes a first sub-condition or a second sub-condition. The step of controlling the air conditioner to start the preset defrosting mode when the air conditioner satisfies the first defrosting condition includes:

[0016] When the air conditioner satisfies the first sub-condition, controlling the electronic expansion valve to operate from the throttling opening to a first target opening;

[0017] When the air conditioner satisfies the second sub-condition, controlling the electronic expansion valve to operate from the throttling opening to a second target opening;

[0018] Wherein, the frosting thickness of the outdoor heat exchanger represented by the first sub-condition is less than the frosting thickness of the outdoor heat exchanger represented by the second sub-condition, and the first target opening is less than the second target opening.

[0019] Optionally, before the step of controlling the air conditioner to start the preset defrosting mode, it further includes:

[0020] When the air conditioner satisfies the first defrosting condition, determining an opening adjustment parameter according to the current throttling opening of the electronic expansion valve and the target opening of the electronic expansion valve in the preset defrosting mode;

[0021] The step of controlling the air conditioner to start the preset defrosting mode includes:

[0022] Controlling the electronic expansion valve to increase from the throttling opening to the target opening according to the opening adjustment parameter.

[0023] Optionally, the step of determining the opening adjustment parameter according to the current throttling opening of the electronic expansion valve and the target opening of the electronic expansion valve in the preset mode includes:

[0024] Determine the opening deviation between the target opening and the throttling opening;

[0025] Determine the opening adjustment amplitude per unit time according to the opening deviation and the preset number of adjustment times. The opening adjustment parameter includes the opening adjustment amplitude.

[0026] Optionally, after the step of controlling the air conditioner to start the preset defrosting mode, the method further includes:

[0027] When the continuous duration of the electronic expansion valve operating at the changed opening is greater than or equal to a first preset duration, determine whether the air conditioner runs to meet the defrosting end condition, and control the air conditioner to run the second mode when the air conditioner runs to meet the defrosting end condition;

[0028] When the continuous duration of the electronic expansion valve operating at the changed opening is less than the first preset duration, control the air conditioner to maintain the current defrosting state.

[0029] Optionally, the defrosting end condition includes that the temperature of the outdoor heat exchanger is greater than or equal to a first temperature threshold, or the defrosting duration of the preset defrosting mode is greater than a second preset duration.

[0030] Optionally, before the step of determining whether the air conditioner runs to meet the defrosting end condition, the method further includes:

[0031] Determine the first temperature threshold according to the temperature state parameter of the environment where the outdoor heat exchanger is located.

[0032] Optionally, the temperature state parameter includes the current temperature and the temperature change trend. The step of determining the first temperature threshold according to the temperature state parameter of the environment where the outdoor heat exchanger is located includes:

[0033] Determine a second temperature threshold according to the temperature change trend;

[0034] When the current temperature is less than or equal to the second temperature threshold, determine the first temperature as the first temperature threshold;

[0035] When the current temperature is greater than the second temperature threshold, determine the second temperature as the first temperature threshold;

[0036] Wherein, the first temperature is less than the second temperature.

[0037] Optionally, the step of determining the second temperature threshold according to the temperature change trend includes:

[0038] When the temperature change trend is rising, determine the third temperature as the second temperature threshold;

[0039] When the temperature change trend is downward, determine the fourth temperature as the second temperature threshold;

[0040] Wherein, the third temperature is greater than the fourth temperature.

[0041] Optionally, the preset defrosting mode includes a first defrosting mode or a second defrosting mode. When the first defrosting mode is started, the frosting thickness of the outdoor heat exchanger is less than the frosting thickness of the outdoor heat exchanger when the second defrosting mode is started;

[0042] The first temperature threshold corresponding to the first defrosting mode is less than the first temperature threshold corresponding to the second defrosting mode, and / or, the second preset duration corresponding to the first defrosting mode is less than the second preset duration corresponding to the second defrosting mode.

[0043] Optionally, before the step of controlling the air conditioner to start the preset defrosting mode when the air conditioner meets the first defrosting condition, the method further includes:

[0044] Obtain the temperature change parameter of the outdoor heat exchanger in the second mode;

[0045] Judge whether the air conditioner meets the first defrosting condition according to the temperature change parameter.

[0046] Optionally, the step of obtaining the temperature change parameter of the outdoor heat exchanger in the second mode includes:

[0047] Obtain the first temperature change value of the outdoor heat exchanger after the second mode is started and the second temperature change value of the environment where the outdoor heat exchanger is located;

[0048] Determine a correction coefficient according to the first temperature change value and / or the second temperature change value;

[0049] Correct the second temperature change value according to the correction coefficient to obtain a target temperature correction value;

[0050] Correct the first temperature change value according to the target temperature correction value to obtain the temperature change parameter.

[0051] Optionally, the first mode includes a third defrosting mode. After the step of controlling the air conditioner to operate in the second mode, the method further includes:

[0052] Judge whether the air conditioner meets a preset condition;

[0053] When the air conditioner does not meet the preset condition, execute the step of controlling the air conditioner to operate the preset defrosting mode when the air conditioner meets the first defrosting condition;

[0054] When the air conditioner meets the preset condition and the second defrosting condition, control the air conditioner to operate in the third defrosting mode;

[0055] Wherein, the preset condition indicates that there is a start-up requirement for the third defrosting mode, and the frosting thickness of the outdoor heat exchanger indicated by the first defrosting condition is less than the frosting thickness of the outdoor heat exchanger indicated by the second defrosting condition.

[0056] Optionally, the preset condition includes at least one of the following conditions:

[0057] The temperature of the environment where the indoor heat exchanger is located is less than the first preset temperature;

[0058] The temperature of the environment where the outdoor heat exchanger is located is less than the second preset temperature;

[0059] The total temperature of the temperature of the environment where the indoor heat exchanger is located and the temperature of the environment where the outdoor heat exchanger is located is less than the third preset temperature;

[0060] The temperature change parameter of the outdoor heat exchanger after the second mode is started is greater than the preset change parameter;

[0061] The temperature of the environment where the outdoor heat exchanger is located is less than the fourth preset temperature, and the duration for which the air conditioner does not operate in the defrosting mode reaches the third preset duration.

[0062] Optionally, the control method of the air conditioner further includes:

[0063] When the air conditioner is in the first mode, obtain the environmental parameters of the environment where the heating component is located;

[0064] Determine the minimum opening degree of the electronic expansion valve according to the environmental parameters;

[0065] Control the electronic expansion valve to operate at a opening degree greater than or equal to the minimum opening degree.

[0066] Optionally, the environmental parameters include the environmental temperature, and the step of determining the minimum opening degree of the electronic expansion valve according to the environmental parameters includes:

[0067] When the environmental temperature is less than or equal to the first preset environmental temperature, determine the first opening degree as the minimum opening degree;

[0068] When the environmental temperature is greater than the second preset environmental temperature, determine the second opening degree as the minimum opening degree;

[0069] When the ambient temperature is greater than the first preset ambient temperature and less than or equal to the second preset ambient temperature, determine the minimum opening degree according to the ambient temperature, and the minimum opening degree is positively correlated with the ambient temperature;

[0070] Wherein, the second opening degree is greater than the first opening degree, and the second preset ambient temperature is greater than the first preset ambient temperature.

[0071] In addition, to achieve the above object, the present application further provides an air conditioner, which includes a control device, a compressor, a commutation component, and an indoor heat exchanger, a one-way throttle valve, a refrigerant heat dissipation pipe, an electronic expansion valve, and an outdoor heat exchanger that are connected in sequence. The refrigerant heat dissipation pipe is arranged to be heat exchange-connected with a heating component, and the one-way throttle valve is arranged to throttle unidirectionally when the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger. The indoor heat exchanger, the compressor, and the outdoor heat exchanger are all connected to the commutation component;

[0072] The commutation component and the electronic expansion valve are both connected to the control device. The control device includes: a memory, a processor, and a control program of the air conditioner stored on the memory and executable on the processor. When the control program of the air conditioner is executed by the processor, the steps of the control method of the air conditioner described in any one of the above are implemented.

[0073] Optionally, the throttling effect of the one-way throttle valve increases with the increase of the pressure difference between the two ends of the one-way throttle valve.

[0074] Optionally, the electronic expansion valve is at least provided with a first opening degree interval and a second opening degree interval. The opening degree of the first opening degree interval is less than the opening degree of the second opening degree interval, and the change rate of the flow rate of the electronic expansion valve with the change of the opening degree in the first opening degree interval is less than the change rate of the flow rate of the electronic expansion valve with the change of the opening degree in the second opening degree interval.

[0075] In addition, to achieve the above object, the present application further provides a storage medium, on which a control program of the air conditioner is stored. When the control program of the air conditioner is executed by a processor, the steps of the control method of the air conditioner described in any one of the above are implemented.

[0076] An air conditioner proposed by the present invention is provided with a one-way throttle valve between the indoor heat exchanger and the refrigerant heat dissipation pipe, and an electronic expansion valve is provided between the outdoor heat exchanger and the refrigerant heat dissipation pipe. The electronic expansion valve can meet the throttling requirements of the second mode and can increase the opening to raise the temperature of the outdoor heat exchanger when the outdoor heat exchanger needs to defrost in the second mode, so as to achieve non-reversing defrosting; while the one-way throttle valve can meet the throttling requirements in the first mode and can not throttle in the second mode or the preset defrosting mode, which can reduce the condensation risk of the refrigerant heat dissipation pipe in the second mode or the preset defrosting mode; moreover, the application of the one-way throttle valve compared with the electronic valve can meet the requirements of different working conditions while reducing costs. Thus, it can be seen that this air conditioner can meet the throttling requirements under different working conditions and achieve non-reversing defrosting at low cost, so as to improve indoor comfort. Description of the Drawings

[0077] Figure 1 It is a schematic structural diagram of the refrigerant system of an embodiment of the air conditioner of the present invention;

[0078] Figure 2 It is a schematic diagram of the flow characteristic of the electronic expansion valve in an embodiment of the air conditioner of the present invention;

[0079] Figure 3 It is a schematic structural diagram of the hardware involved in the operation of an embodiment of the air conditioner of the present invention;

[0080] Figure 4 It is a schematic flow chart of an embodiment of the control method of the air conditioner of the present invention;

[0081] Figure 5 It is a schematic flow chart of another embodiment of the control method of the air conditioner of the present invention;

[0082] Figure 6 It is a schematic flow chart of still another embodiment of the control method of the air conditioner of the present invention;

[0083] Figure 7 It is a schematic flow chart of yet another embodiment of the control method of the air conditioner of the present invention;

[0084] Figure 8 It is a schematic flow chart of another optional embodiment of the control method of the air conditioner of the present invention.

[0085] The realization, functional characteristics and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Embodiments

[0086] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0087] An embodiment of the present invention provides an air conditioner. The air conditioner can be any type of air conditioner such as a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a multi-connected air conditioner, a ceiling-mounted air conditioner, a portable air conditioner, etc.

[0088] In the embodiment of the present invention, with reference to Figure 1 and Figure 3 , the air conditioner includes a refrigerant circulation circuit and a control device 100. The refrigerant circulation circuit includes a compressor 2, a reversing component 3, an indoor heat exchanger 4, a one-way throttle valve 5, a refrigerant heat dissipation pipe 6, an electronic expansion valve 7, and an outdoor heat exchanger 8. The refrigerant heat dissipation pipe 6 is heat-exchange connected to a heating component. Wherein, the indoor heat exchanger 4, the one-way throttle valve 5, the refrigerant heat dissipation pipe 6, the electronic expansion valve 7, and the outdoor heat exchanger 8 are connected in sequence. The one-way throttle valve 5 is configured such that when the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger, it throttles the refrigerant in one direction. The electronic expansion valve 7, the compressor 2, and the reversing component 3 are all connected to the control device 100.

[0089] In this embodiment, the heating component is disposed in the environment where the outdoor heat exchanger 8 is located, such as an electrical control component in an outdoor unit. In other embodiments, the heating component can also be other components that generate heat during operation and are disposed indoors within the air conditioner. The refrigerant heat dissipation pipe 6 can dissipate heat from the heating component.

[0090] Specifically, the suction port of the compressor 2, the discharge port of the compressor 2, the first end of the indoor heat exchanger 4, and the first end of the outdoor heat exchanger 8 are all communicated with the reversing component 3. The second end of the indoor heat exchanger 4, the one-way throttle valve 5, the refrigerant heat dissipation pipe 6, the electronic expansion valve 7, and the second end of the outdoor heat exchanger 8 are communicated in sequence.

[0091] The one-way throttle valve 5 is configured such that when the refrigerant flows from the indoor heat exchanger 4 to the outdoor heat exchanger 8, it stops throttling the flowing refrigerant, and when the refrigerant flows from the outdoor heat exchanger 8 to the indoor heat exchanger 4, it throttles the flowing refrigerant.

[0092] In this embodiment, the electronic expansion valve 7 is a throttle component with adjustable opening, and its opening can be changed under the control of the current output by the control device 100.

[0093] The reversing component 3 is used to switch the refrigerant flow direction between the outdoor heat exchanger 8 and the indoor heat exchanger 5. In this embodiment, the reversing component 3 includes a four-way valve.

[0094] When the reversing component is in the first operating state, the discharge port of the compressor 2 is communicated with the first end of the outdoor heat exchanger 8, and the suction port of the compressor 2 is communicated with the first end of the indoor heat exchanger 4. At this time, the refrigerant flowing out of the compressor 2 flows through the outdoor heat exchanger 8, the electronic expansion valve 7, the refrigerant heat dissipation pipe 6, the one-way throttle valve 5, and the indoor heat exchanger 4 in sequence and then flows into the suction port of the compressor 2.

[0095] When the commutation assembly is in the second operating state, the exhaust port of the compressor 2 is communicated with the first end of the indoor heat exchanger 4, and the suction port of the compressor 2 is communicated with the first end of the outdoor heat exchanger 8. At this time, the refrigerant flowing out of the compressor 2 sequentially flows through the indoor heat exchanger 4, the one-way throttle valve 5, the refrigerant heat dissipation pipe 6, the electronic expansion valve 7, and the outdoor heat exchanger 8 and then flows into the suction port of the compressor 2.

[0096] Through the cooperation of the commutation assembly 4, the one-way throttle valve 5, and the electronic expansion valve 7, the operating modes of the air conditioner at least include the following several types:

[0097] The first mode, the commutation assembly 3 operates in the first operating state, the one-way throttle valve 5 is in the throttling state to throttle and depressurize the flowing refrigerant. The refrigerant flowing out of the compressor 2 sequentially flows through the outdoor heat exchanger 8, the electronic expansion valve 7, the refrigerant heat dissipation pipe 6, the one-way throttle valve 5, and the indoor heat exchanger 4 and then flows into the suction port of the compressor 2. Specifically, the refrigerant flow direction is as shown by the solid line in Figure 1 . Among them, the indoor heat exchanger 4 is in the evaporation state, and the outdoor heat exchanger 8 is in the condensation state. The first mode may include a refrigeration mode or a commutation defrosting mode. In the refrigeration mode, the indoor heat exchanger 4 can release cold to the indoor environment to lower the indoor temperature; in the commutation defrosting mode, the high-temperature refrigerant in the outdoor heat exchanger 8 can release heat to melt the ice and frost on its surface.

[0098] The second mode, the commutation assembly 3 operates in the second operating state, the one-way throttle valve 5 stops throttling the flowing refrigerant, the electronic expansion valve 7 operates with a throttling opening degree. The refrigerant flowing out of the compressor 2 sequentially flows through the indoor heat exchanger 4, the one-way throttle valve 5, the refrigerant heat dissipation pipe 6, the electronic expansion valve 7, and the outdoor heat exchanger 8 and then returns to the compressor 2. The one-way throttle valve 5 is fully opened, the electronic expansion valve 7 is opened with a throttling opening degree, the indoor heat exchanger 4 is in the condensation state, the outdoor heat exchanger 8 is in the evaporation state, and the indoor heat exchanger 4 can exchange heat with the indoor air to raise the indoor environmental temperature. Specifically, the refrigerant flow direction is as shown by the dotted line in Figure 1 .

[0099] The preset defrosting mode, the commutation assembly 3 operates in the second operating state, the one-way throttle valve 5 stops throttling the flowing refrigerant, the electronic expansion valve 7 operates with an opening degree greater than the throttling opening degree in the second mode. The refrigerant flowing out of the compressor 2 sequentially flows through the indoor heat exchanger 4, the one-way throttle valve 5, the refrigerant heat dissipation pipe 6, the electronic expansion valve 7, and the outdoor heat exchanger 8 and then returns to the compressor 2. Specifically, the refrigerant flow direction is as shown by the dotted line in Figure 1As shown by the dashed line in [figure]. Among them, when the refrigerant flows through the one-way throttle valve 5 and the electronic expansion valve 7, the throttling and pressure reduction and temperature reduction effects are less than those of the one-way throttle valve 5 and the electronic expansion valve 7 on the flowing refrigerant in the second mode. Based on this, the temperature of the refrigerant flowing into the outdoor heat exchanger 8 in the preset defrosting mode is higher than that of the refrigerant flowing into the outdoor heat exchanger 8 in the second mode. The relatively high-temperature refrigerant flowing into the outdoor heat exchanger 8 can reduce its frosting (prevent the appearance of ice or frost or melt the thin frost on the surface of the outdoor heat exchanger 8). Among them, the temperature of the outdoor heat exchanger 8 in the preset defrosting mode is higher than that of the outdoor heat exchanger 8 in the second mode. The preset defrosting mode can include a first defrosting mode or a second defrosting mode. In the first defrosting mode, the opening degree of the electronic expansion valve 7 is less than that in the second defrosting mode, and the temperature of the outdoor heat exchanger 8 in the first defrosting mode can be lower than that of the outdoor heat exchanger 8 in the second defrosting mode.

[0100] Among them, when the outdoor heat exchanger 8 frosts in the second mode, when the frosting thickness of the outdoor heat exchanger 8 is small, the first defrosting mode can be used for defrosting; when the frosting thickness of the outdoor heat exchanger 8 is medium, the second defrosting mode is used for defrosting; when the frosting thickness of the outdoor heat exchanger 8 is large, the reverse defrosting mode is used for defrosting.

[0101] In the embodiment of the present invention, a one-way throttle valve 5 is provided between the indoor heat exchanger 4 and the refrigerant heat dissipation pipe 6 of the air conditioner, and an electronic expansion valve 7 is provided between the outdoor heat exchanger 8 and the refrigerant heat dissipation pipe 6. The electronic expansion valve 7 can meet the throttling requirements of the second mode and can increase the temperature of the outdoor heat exchanger 8 by increasing the opening degree when the outdoor heat exchanger 8 needs to be defrosted in the second mode to achieve non-reversing defrosting; while the one-way throttle valve 5 can meet the throttling requirements in the first mode and can not throttle in the second mode or the preset defrosting mode, which can reduce the condensation risk of the refrigerant heat dissipation pipe 6 in the second mode or the preset defrosting mode; and, the application of the one-way throttle valve 5 compared with the electronic valve can meet the requirements of different working conditions while reducing costs. Thus, the air conditioner can meet the throttling requirements under different working conditions and achieve non-reversing defrosting at low cost to improve indoor comfort.

[0102] Further, in an embodiment, the throttling effect of the one-way throttle valve 5 increases with the increase of the pressure difference between the two ends of the one-way throttle valve 5. The one-way throttle valve 5 is a throttle valve with variable flow rate. Specifically, the throttling effect of the one-way throttle valve 5 increases with the increase of the pressure difference between the two ends of the one-way throttle valve 5. Among them, when the one-way throttle valve 5 is in the throttling state, as the pressure difference between the two ends of the one-way throttle valve 5 increases, the flow area of the throttling flow channel in the one-way throttle valve 5 increases; as the pressure difference between the two ends of the one-way throttle valve 5 decreases, the flow area of the throttling flow channel in the one-way throttle valve 5 decreases.

[0103] In this embodiment, the one-way throttle valve 5 is set to variable flow. During the operation in the first mode, when the air conditioner operates at low load (low frequency or low pressure, etc.), the pressure difference across the one-way throttle valve 5 is small, so the flow rate is small, which is beneficial to ensuring the throttling effect and can ensure the oil return effect of the compressor 2, etc., effectively improving the system reliability; when the air conditioner operates at high load (high frequency or high pressure, etc.), the pressure difference across the one-way throttle valve 5 is large, so the flow rate is large, effectively improving the refrigeration effect of the system.

[0104] Further, in an embodiment, the electronic expansion valve 7 is provided with at least a first opening range and a second opening range. The opening of the first opening range is smaller than that of the second opening range. When the opening is within the first opening range, the change rate of the flow rate of the electronic expansion valve 7 with respect to the change in opening is smaller than when the opening is within the second opening range. Specifically, the electronic expansion valve 7 is an electronic expansion valve 7 with variable gain. The change rate of the flow rate with respect to the change in opening refers to the amplitude of the flow rate change when the opening of the electronic expansion valve 7 changes by a unit opening change value. In this embodiment, the flow rate characteristic curve of the electronic expansion valve 7 is as Figure 2 shown. Among them, the range from 0 to P1 is the first opening range, and the range from P1 to P2 is the second opening range. The slope of this flow rate characteristic curve represents the change rate. The curve slope of the first opening range is the first slope, and the curve slope of the second opening range is the second slope. The first slope is smaller than the second slope.

[0105] When the refrigerant flow rate required by the system is low during the operation in the first mode, the electronic expansion valve 7 can operate at the opening within the first opening range. During the process of adjusting the opening of the electronic expansion valve 7, the flow rate will not change significantly, which is beneficial to improving the heating effect of the system.

[0106] During the process of the air conditioner switching from the second mode to the preset defrosting mode, the opening of the electronic expansion valve 7 needs to be increased to a larger opening within the second opening range to meet the defrosting effect of the outdoor heat exchanger 8. During the process of increasing the opening of the electronic expansion valve 7, the flow rate can increase rapidly, ensuring that the refrigerant carrying heat can quickly flow into the outdoor heat exchanger 8 to release heat, effectively improving the defrosting effect. Among them, the one-way throttle valve 5 is fully opened, which can prevent the refrigerant heat dissipation pipe 6 from condensing due to too low temperature, improving the system operation reliability.

[0107] Further, in an embodiment, referring to Figure 3 , the air conditioner further includes an environment detection module 01, and the environment detection module 01 is connected to the control device 100. The environment detection module 01 can be used to detect the environmental temperature of the environment where the air conditioner is located. For example, the indoor temperature of the indoor environment and / or the outdoor temperature of the outdoor environment and / or the environmental temperature of the environment where the heating component is located.

[0108] Further, in one embodiment, referring to Figure 3 , the air conditioner further includes a temperature sensor 02, and the temperature sensor 02 is connected to the control device 100. The temperature sensor 02 can be disposed on the coil of the outdoor heat exchanger 8 to detect the temperature of the outdoor heat exchanger 8.

[0109] In the embodiment of the present invention, referring to Figure 3 , the control device 100 of the air conditioner includes: a processor 1001 (such as a CPU), a memory 1002, a timer 1003, etc. Each component in the control device 100 is connected through a communication bus. The memory 1002 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0110] Those skilled in the art can understand that Figure 3 the device structure shown in

[0111] does not constitute a limitation to the device, and it may include more or fewer components than shown in the figure, or combine some components, or arrange different components. Figure 3 As shown in Figure 3 , the memory 1002 as a storage medium may include a control program of the air conditioner. In the device shown in

[0112] , the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the relevant step operations of the control method of the air conditioner in the following embodiments.

[0113] The embodiment of the present invention further provides a control method for an air conditioner, which is applied to the above-mentioned air conditioner. Figure 4 Referring to

[0114] , an embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, the control method of the air conditioner includes:

[0115] Step S10, controlling the air conditioner to operate in the second mode; Figure 1 In this embodiment, when the air conditioner is in the second mode, the commutation component operates in the second operating state, the one-way throttle valve stops throttling the flowing refrigerant, the electronic expansion valve operates with a throttling opening, and the refrigerant flowing out of the compressor flows through the indoor heat exchanger, the one-way throttle valve, the refrigerant heat dissipation pipe, the electronic expansion valve, and the outdoor heat exchanger in sequence and then returns to the compressor. Specifically, the refrigerant flow direction is as shown by the dotted line in

[0116] The throttling opening of the electronic expansion valve can be a preset fixed opening, or an opening determined according to the actual operating conditions of the air conditioner.

[0117] Step S20: When the air conditioner meets the first defrost condition, the air conditioner is controlled to start the preset defrost mode.

[0118] The first defrost condition herein specifically refers to a condition for initiating the preset defrost mode. The first defrost condition indicates that the frost thickness on the outdoor heat exchanger is less than a preset thickness. The first defrost condition may specifically refer to a condition that must be satisfied by the air conditioner's state and / or environmental parameters of the air conditioner's environment when frost forms on the outdoor heat exchanger but the frost thickness is less than a preset thickness.

[0119] In the preset defrost mode, the reversing assembly operates in the second operating state, the one-way throttle valve stops throttling the refrigerant, and the electronic expansion valve operates at an opening greater than the throttling opening. The refrigerant flowing out of the compressor flows through the indoor heat exchanger, the one-way throttle valve, the refrigerant heat pipe, the electronic expansion valve, and the outdoor heat exchanger in sequence before returning to the compressor. Specifically, the refrigerant flow direction is as follows: Figure 1 As shown by the dotted line in .

[0120] When the air conditioner switches from the second defrost mode to the preset defrost mode, the reversing assembly maintains the second operating state, and the electronic expansion valve increases from the throttling opening to the target opening of the electronic expansion valve in the preset defrost mode. The target opening may be determined based on the throttling opening in the second mode and / or the frosting state of the outdoor heat exchanger.

[0121] In the preset defrost mode, the throttling, pressure-reducing, and temperature-reducing effects of the refrigerant flowing through the one-way throttle valve and the electronic expansion valve are less than those in the second mode. Therefore, the temperature of the refrigerant flowing into the outdoor heat exchanger in the preset defrost mode is higher than the temperature of the refrigerant flowing into the outdoor heat exchanger in the second mode. The relatively high-temperature refrigerant flowing into the outdoor heat exchanger can reduce frost formation (avoiding frost or melting any thin frost formed on the surface of the outdoor heat exchanger). The temperature of the outdoor heat exchanger in the preset defrost mode is higher than the temperature of the outdoor heat exchanger in the second mode.

[0122] An embodiment of the present invention provides a control method for an air conditioner. An electronic expansion valve can meet the throttling requirements of a second mode and, when defrosting is required in the second mode, can increase the opening to raise the outdoor heat exchanger temperature, thereby achieving non-reversing defrosting. A one-way throttle valve can meet the throttling requirements of a first mode and can be non-throttled in the second mode or a preset defrost mode, thereby reducing the risk of condensation on the refrigerant heat pipe in the second mode or the preset defrost mode. Furthermore, compared to electronic valves, the one-way throttle valve can meet the requirements of different operating conditions while reducing costs. Thus, the air conditioner can meet the throttling requirements of different operating conditions while achieving non-reversing defrosting at a low cost, thereby improving indoor comfort.

[0123] Further, in this embodiment, the preset defrosting mode includes a first defrosting mode or a second defrosting mode. The first defrosting condition includes a first sub-condition or a second sub-condition. The step of controlling the air conditioner to start the preset defrosting mode when the air conditioner satisfies the first defrosting condition includes:

[0124] When the air conditioner satisfies the first sub-condition, control the electronic expansion valve to operate from the throttling opening degree to increase to a first target opening degree;

[0125] When the air conditioner satisfies the second sub-condition, control the electronic expansion valve to operate from the throttling opening degree to increase to a second target opening degree;

[0126] Wherein, the frosting thickness of the outdoor heat exchanger represented by the first sub-condition is less than the frosting thickness of the outdoor heat exchanger represented by the second sub-condition, and the first target opening degree is less than the second target opening degree.

[0127] The refrigerant temperature of the outdoor heat exchanger in the first defrosting mode is less than the refrigerant temperature of the outdoor heat exchanger in the second defrosting mode. Specifically, the fans corresponding to the outdoor heat exchanger in the first defrosting mode and the second defrosting mode are turned off, the fans corresponding to the indoor heat exchanger in the first defrosting mode and the second defrosting mode are reduced to the lowest speed operation, and the compressor operation frequency in the first defrosting mode is less than the compressor operation frequency in the second defrosting mode. Then, the defrosting intensity in the first defrosting mode is less than the defrosting intensity in the second defrosting mode.

[0128] The first target opening degree and the second target opening degree can be preset fixed opening degrees or opening degrees determined according to the actual operating state of the air conditioner.

[0129] In this embodiment, when the outdoor heat exchanger frosts in the second mode, different intensity non-reversing defrosting modes are adopted according to different frosting thicknesses to defrost, so as to improve the indoor comfort and the defrosting effect at the same time.

[0130] Further, based on the above embodiment, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, referring to Figure 5 before the step of controlling the air conditioner to start the preset defrosting mode, it further includes:

[0131] Step S21, when the air conditioner satisfies the first defrosting condition, determine an opening degree adjustment parameter according to the current throttling opening degree of the electronic expansion valve and the target opening degree of the electronic expansion valve in the preset defrosting mode;

[0132] The current throttling opening degree is specifically the current opening degree of the electronic expansion valve when the air conditioner satisfies the first defrosting condition in the second mode.

[0133] The target opening degree can be a preset fixed opening degree or an opening degree determined according to the actual operating conditions of the air conditioner. For example, the target opening degree here is determined according to the state parameter representing the frosting degree of the outdoor heat exchanger. The state parameter can include at least one of the following: the temperature of the outdoor heat exchanger, the temperature of the environment where the outdoor heat exchanger is located, the refrigerant inlet and outlet temperatures of the outdoor heat exchanger, and so on. The target opening degree in the above first defrosting mode is the above first target opening degree, and the target opening degree in the above second defrosting mode is the above second target opening degree.

[0134] The opening degree adjustment parameter specifically includes the opening degree adjustment amplitude or the opening degree adjustment rate per unit time, and so on.

[0135] Different throttling opening degrees and different target opening degrees correspond to different opening degree adjustment parameters. In one implementation, the opening degree deviation between the target opening degree and the throttling opening degree is determined, and the opening degree adjustment parameter is determined according to the opening degree deviation. The opening degree adjustment parameter is positively correlated with the opening degree deviation. Specifically, the opening degree adjustment parameter can be calculated by substituting the opening degree deviation into a preset formula. In another implementation, the target interval where the opening degree deviation is located can be determined, and the opening degree adjustment parameter is determined according to the target interval.

[0136] The step of controlling the air conditioner to start the preset defrosting mode includes:

[0137] Step S22, controlling the electronic expansion valve to increase from the throttling opening degree to the target opening degree according to the opening degree adjustment parameter.

[0138] When the opening degree adjustment parameter includes the opening degree adjustment amplitude per unit time, the electronic expansion valve can be controlled to increase the opening degree by the opening degree adjustment amplitude per unit time until the opening degree of the electronic expansion valve reaches the target opening degree.

[0139] When the opening degree adjustment parameter includes the opening degree adjustment rate, the electronic expansion valve can be controlled to increase the opening degree at the opening degree adjustment rate.

[0140] In this embodiment, the opening degree adjustment parameter when the electronic expansion valve increases the opening degree is no longer a preset fixed adjustment parameter, but an opening degree adjustment parameter determined according to the current opening degree and the target opening degree, which is beneficial to avoiding the refrigerant abnormal noise generated by the air conditioner due to the too fast change of the opening degree of the electronic expansion valve, and can also avoid the too slow change of the opening degree of the electronic expansion valve affecting the defrosting efficiency, so as to reduce the noise of the air conditioner while ensuring the defrosting efficiency.

[0141] Furthermore, in this embodiment, the step of determining the opening adjustment parameter based on the current throttling opening of the electronic expansion valve and the target opening of the electronic expansion valve in the preset mode includes: determining the opening deviation between the target opening and the throttling opening; determining the opening adjustment amplitude per unit time based on the opening deviation and the preset adjustment number of times, and the opening adjustment parameter includes the opening adjustment amplitude.

[0142] In this embodiment, the ratio of the opening deviation to the preset adjustment times is used as the opening adjustment amplitude. In other embodiments, the ratio can also be corrected according to the correction value and used as the opening adjustment amplitude.

[0143] The preset number of adjustments here specifically refers to the preset number of adjustments when the electronic expansion valve increases its opening. The preset number of adjustments varies depending on the rated capacity of the air conditioner.

[0144] In this embodiment, the above method can effectively improve the accuracy of the electronic expansion valve opening adjustment, thereby further avoiding the refrigerant noise caused by too fast opening changes, and avoiding the defrost efficiency of the second heat exchanger affected by too slow opening changes, so as to effectively reduce the refrigerant noise while improving the defrost efficiency.

[0145] Furthermore, based on any of the above embodiments, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, referring to Figure 6 After the step of controlling the air conditioner to start the preset defrost mode, the method further includes:

[0146] Step S30, when the duration of the operation of the electronic expansion valve at the changed opening is greater than or equal to a first preset duration, determining whether the air conditioner has been operated to meet a defrost end condition, and controlling the air conditioner to operate in the second mode when the air conditioner has been operated to meet the defrost end condition;

[0147] The duration here may include the duration for which the electronic expansion valve maintains the target opening after increasing to the target opening in step S20, or the duration may include the duration for which the electronic expansion valve continues to operate at a variable opening after increasing or decreasing the opening based on the target opening to adapt to the actual operating conditions of the air conditioner after step S20.

[0148] The first preset time period may be a pre-set fixed time period, or may be a time period determined according to the actual operation of the air conditioner.

[0149] The defrosting end condition is specifically the condition that the operating state parameters (such as defrosting duration and / or the temperature of the outdoor heat exchanger, etc.) of the air conditioner and / or the environmental state parameters (such as ambient temperature, etc.) of the environment where the air conditioner is located need to meet when the defrosting of the outdoor heat exchanger is completed as preset. The above-mentioned first defrosting mode and second defrosting mode respectively correspond to different defrosting end conditions.

[0150] When the air conditioner operates to meet the defrosting end condition, control the air conditioner to exit the preset defrosting mode and resume operation in the second mode. Specifically, the electronic expansion valve can be controlled to decrease to the throttling opening degree before the start of the preset defrosting mode for operation.

[0151] Step S40, when the continuous duration of the electronic expansion valve operating at the changed opening degree is less than the first preset duration, control the air conditioner to maintain the current defrosting state for operation.

[0152] In this embodiment, within a period of time after the opening degree of the electronic expansion valve changes, it is not determined whether the air conditioner meets the defrosting end condition, but the defrosting operation is maintained; after the opening degree of the electronic expansion valve changes and operates stably for a period of time, it is then determined whether the air conditioner meets the defrosting end condition, which can avoid the system state fluctuation caused by the change of the opening degree of the electronic expansion valve and affect the accuracy of the defrosting exit determination, and is beneficial to ensuring the defrosting effect of the outdoor heat exchanger to ensure the normal operation of the air conditioner after resuming the second mode.

[0153] Further, in this embodiment, the defrosting end condition includes that the temperature of the outdoor heat exchanger is greater than or equal to the first temperature threshold, or the defrosting duration of the preset defrosting mode is greater than the second preset duration.

[0154] The first temperature threshold and / or the second preset duration can be preset fixed parameters, or parameters determined according to the actual operation conditions of the air conditioner.

[0155] Among them, different defrosting modes correspond to different first temperature thresholds and / or second preset durations. Specifically, the preset defrosting mode includes a first defrosting mode or a second defrosting mode. When the first defrosting mode is started, the frosting thickness of the outdoor heat exchanger is less than the frosting thickness of the outdoor heat exchanger when the second defrosting mode is started. The first temperature threshold corresponding to the first defrosting mode is less than the first temperature threshold corresponding to the second defrosting mode, and the second preset duration corresponding to the first defrosting mode is less than the second preset duration corresponding to the second defrosting mode.

[0156] In this embodiment, before the step of determining whether the air conditioner operates to meet the defrosting end condition, the method further includes: determining the first temperature threshold according to the temperature state parameter of the environment where the outdoor heat exchanger is located. The temperature state parameter includes at least one of the following parameters: current temperature, temperature change parameter (temperature change trend and / or temperature change amplitude, etc.).

[0157] In this embodiment, by the above method, it is beneficial to ensure the defrosting effect and the thermal comfort of the indoor environment at the same time. Among them, determining the first temperature threshold according to the temperature state parameter of the environment where the outdoor heat exchanger is located is beneficial to accurately characterize the defrosting cleanliness of the outdoor heat exchanger and ensure the timeliness of defrosting exit.

[0158] Further, in this embodiment, the temperature state parameter includes the current temperature and the temperature change trend. The step of determining the first temperature threshold according to the temperature state parameter of the environment where the outdoor heat exchanger is located includes: determining a second temperature threshold according to the temperature change trend; when the current temperature is less than or equal to the second temperature threshold, determining the first temperature as the first temperature threshold; when the current temperature is greater than the second temperature threshold, determining the second temperature as the first temperature threshold; wherein, the first temperature is less than the second temperature.

[0159] Different temperature change trends correspond to different second temperature thresholds. In this embodiment, when the temperature change trend is rising, determining the third temperature as the second temperature threshold; when the temperature change trend is falling, determining the fourth temperature as the second temperature threshold; wherein, the third temperature is greater than the fourth temperature.

[0160] For example, defining the temperature of the environment where the outdoor heat exchanger is located as T4, when the change trend of T4 is rising, the second temperature threshold is 1°C, and when the change trend of T4 is falling, the second temperature threshold is -1°C; the first temperature is 14°C and the second temperature is 18°C, then the defrosting end conditions include:

[0161] T4 rising trend, T4 ≤ 1°C, T3 ≥ 14°C;

[0162] T4 rising trend, T4 > 1°C, T3 ≥ 18°C;

[0163] T4 falling trend, T4 ≤ -1°C, T3 ≥ 14°C;

[0164] T4 falling trend, T4 > -1°C, T3 ≥ 18°C.

[0165] In this embodiment, it is beneficial to improve the accuracy of the defrosting end condition, ensure that the defrosting of the outdoor heat exchanger is clean before exiting the defrosting, so as to effectively improve the output capacity of the air conditioner after exiting the defrosting.

[0166] In other embodiments, the first temperature threshold here can also be determined by the temperature difference value between the current temperature and the second temperature threshold.

[0167] Further, based on any of the above embodiments, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, referring to Figure 7 , before step S20, it further includes:

[0168] Step S01, obtaining the temperature change parameter of the outdoor heat exchanger in the second mode;

[0169] The temperature change parameter is a parameter characterizing the temperature drop of the outdoor heat exchanger in the second mode. The temperature change parameter can be determined based on the temperature data detected by the temperature sensor on the outdoor heat exchanger, and the temperature change parameter can also be determined based on the temperature data detected by the temperature sensors of the outdoor heat exchanger and the environment where the outdoor heat exchanger is located.

[0170] Step S02, judging whether the air conditioner meets the first defrosting condition according to the temperature change parameter.

[0171] The first defrosting condition may include a target temperature range that the temperature change parameter needs to reach. When the temperature change parameter is within the target temperature range, it can be determined that the air conditioner meets the first defrosting condition; when the temperature change parameter is outside the target temperature range, it can be determined that the air conditioner does not meet the first defrosting condition. The first sub-condition includes that the temperature drop value represented by the temperature change parameter is greater than the first preset value, and the second sub-condition includes that the temperature drop value represented by the temperature change parameter is greater than the second preset value, and the first preset value is less than the second preset value.

[0172] In this embodiment, the temperature change parameter can accurately characterize whether the outdoor heat exchanger is frosted in the second mode. Therefore, judging whether the air conditioner starts the non-reversing defrosting mode through the temperature change parameter is beneficial to improving the accuracy of the preset defrosting mode start control, so as to further balance the indoor heating effect and the defrosting effect of the outdoor heat exchanger.

[0173] Further, in this embodiment, the step of obtaining the temperature change parameter of the outdoor heat exchanger in the second mode includes: obtaining the first temperature change value of the outdoor heat exchanger after the start of the second mode and the second temperature change value of the environment where the outdoor heat exchanger is located; determining a correction coefficient according to the first temperature change value and / or the second temperature change value; correcting the second temperature change value according to the correction coefficient to obtain a target temperature correction value; and correcting the first temperature change value according to the target temperature correction value to obtain the temperature change parameter.

[0174] The first temperature change value is specifically the temperature difference value between the current temperature of the outdoor heat exchanger and the initial temperature of the outdoor heat exchanger in the initial stage after the start of the second mode.

[0175] The second temperature change value is specifically the temperature difference value between the current temperature of the environment where the outdoor heat exchanger is located and the initial ambient temperature of the environment where the outdoor heat exchanger is located during the initial stage after the second mode is started.

[0176] In this embodiment, the correction coefficient is positively correlated with the absolute value of the first temperature change value and / or the second temperature change value. For example, if the second temperature change value is T4 - T40, then when |T4 - T40| ≥ the first threshold (e.g., 6°C), the correction coefficient is the first coefficient (e.g., 1), and when |T4 - T40| < the first threshold (e.g., 6°C), the correction coefficient is the second coefficient (e.g., 0.9), and the first coefficient is greater than the second coefficient.

[0177] In this embodiment, the product of the correction coefficient and the second temperature change value is the target temperature correction value, and the difference between the first temperature change value and the target temperature correction value is determined as the temperature change parameter.

[0178] In this embodiment, through the above method, it can be ensured that the temperature change parameter can accurately reflect the frosting risk of the outdoor heat exchanger in its environment, which is conducive to further improving the accuracy of the determination of whether the air conditioner performs non-reversing defrosting, and thus is conducive to ensuring the defrosting effect and improving indoor comfort at the same time.

[0179] In other embodiments, the first temperature change value may also be used as the temperature change parameter, or the difference between the first temperature change value and the second temperature change value may be used as the temperature change parameter.

[0180] Further, based on any of the above embodiments, another optional embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, the first mode includes a third defrosting mode. After the step of controlling the air conditioner to operate the second mode, it further includes: determining whether the air conditioner meets a preset condition; when the air conditioner does not meet the preset condition, executing the step of when the air conditioner meets the first defrosting condition, controlling the air conditioner to operate the preset defrosting mode; when the air conditioner meets the preset condition and the second defrosting condition, controlling the air conditioner to operate the third defrosting mode; wherein, the preset condition indicates that the third defrosting mode has a start requirement, the first defrosting condition indicates that the frosting thickness of the outdoor heat exchanger is less than the frosting thickness of the outdoor heat exchanger indicated by the second defrosting condition.

[0181] The preset condition is the operating parameters of the air conditioner itself and / or the conditions that the environment where the air conditioner is located need to meet when the frosting speed of the outdoor heat exchanger is relatively fast.

[0182] The second defrosting condition specifically refers to the operating parameters of the air conditioner itself and / or the conditions that need to be met in the environment where the air conditioner is located when the third defrosting mode is activated. The third activation condition can indicate that the outdoor heat exchanger has frosted, but the thickness of the frost layer is greater than the preset thickness (thick frost). The frost thickness of the outdoor heat exchanger corresponding to the first sub-condition, the second sub-condition, and the second defrosting condition increases in sequence.

[0183] Specifically, it is possible to detect whether the air conditioner meets the preset conditions when the second mode is activated, and it is also possible to detect whether the air conditioner meets the preset conditions at intervals of a set time during the operation of the second mode. It is also possible to detect whether the air conditioner meets the preset conditions when a defrosting instruction input by the user is received during the operation of the second mode.

[0184] If the air conditioner does not meet the preset conditions, it indicates that the frosting speed of the air conditioner is slow, and it can be considered that there is no need to consider using the third defrosting mode for defrosting. At this time, first judge whether the air conditioner meets the second sub-condition. When the air conditioner meets the second sub-condition, control the air conditioner to operate in the second defrosting mode; when the air conditioner does not meet the second sub-condition, judge whether the air conditioner meets the first sub-condition. When the air conditioner meets the first sub-condition, control the air conditioner to operate in the first defrosting mode.

[0185] In this embodiment, when the air conditioner is in the third defrosting mode, the commutation component operates in the first operating state, and the one-way throttle valve throttles and reduces the pressure of the flowing refrigerant. The refrigerant flowing out of the compressor flows through the outdoor heat exchanger, the electronic expansion valve, the refrigerant heat dissipation pipe, the one-way throttle valve, and the indoor heat exchanger in sequence and then flows into the suction port of the compressor. Specifically, the refrigerant flow direction is as Figure 1 shown by the solid line in. Among them, the indoor heat exchanger is in the evaporation state, and the outdoor heat exchanger is in the condensation state. In the third defrosting mode, the high-temperature refrigerant in the outdoor heat exchanger can release heat to melt the ice and frost on its surface.

[0186] In the third defrosting mode, the electronic expansion valve can be opened at a preset fixed opening degree, or can operate at an opening degree determined according to the actual operating conditions of the air conditioner.

[0187] In this embodiment, after identifying the preset conditions to eliminate the risk of thick frost on the air conditioner, the method further determines whether the air conditioner needs to operate in the non-commutation defrosting mode by identifying the first defrosting condition, which can ensure that the outdoor heat exchanger is defrosted cleanly while reducing the indoor temperature fluctuation caused by commutation defrosting, thereby improving the defrosting effect and the indoor environment comfort; when the air conditioner has a risk of thick frost and it is determined that defrosting is required through the second defrosting condition, the commutation defrosting operation is preferentially adopted to ensure that there is enough heat to melt the ice and frost on the outdoor heat exchanger cleanly, thereby improving the defrosting effect to ensure the normal operation of the air conditioner.

[0188] Furthermore, in this embodiment, the preset conditions include at least one of the following conditions:

[0189] Condition 1: The temperature of the environment where the indoor heat exchanger is located is less than the first preset temperature;

[0190] Condition 2: The temperature of the environment where the outdoor heat exchanger is located is less than the second preset temperature;

[0191] Condition 3: The total temperature of the environment where the indoor heat exchanger is located and the environment where the outdoor heat exchanger is located is less than the third preset temperature;

[0192] Condition 4: After the second mode is started, the temperature change parameter of the outdoor heat exchanger is greater than the preset change parameter;

[0193] Condition 5: The temperature of the environment where the outdoor heat exchanger is located is less than the fourth preset temperature, and the duration for which the air conditioner does not operate the defrosting mode reaches the third preset duration.

[0194] The temperature of the environment where the indoor heat exchanger is located and / or the temperature of the environment where the outdoor heat exchanger is located are detected by the above-mentioned environment detection module.

[0195] In the second mode, the first temperature value of the outdoor heat exchanger is detected within a set duration after the compressor is started. After the compressor operates for a period of time, the current second temperature value of the outdoor heat exchanger is detected, and the temperature change parameter here is determined according to the difference between the second temperature value and the first temperature value. Alternatively, the temperature change parameter can be determined in the manner mentioned in the above embodiment.

[0196] Here, the non-execution of the defrosting action specifically refers to the state where the air conditioner does not operate any of the above-mentioned first defrosting mode, second defrosting mode, or third defrosting mode for defrosting the outdoor heat exchanger.

[0197] When the air conditioner meets Condition 1, when the indoor environmental temperature is too low, the temperatures of both the indoor and outdoor heat exchangers are very low. If the preset defrosting mode is used for defrosting at this time, affected by the low indoor temperature, the heat generated by the outdoor unit will also be very low, and it is impossible to raise the temperature of the outdoor heat exchanger to the level where frosting can be eliminated in a short time. Therefore, at this time, the judgment of the second defrosting condition is beneficial to ensuring that sufficient heat is provided in a timely manner through the operation of the third defrosting mode to melt the frost on the outdoor heat exchanger cleanly, thereby improving the defrosting effect.

[0198] When the air conditioner meets Condition 2, when the outdoor environmental temperature is relatively low, the temperature of the outdoor heat exchanger is also very low. Operating the preset defrosting mode at this time will cause the heat generated in the outdoor heat exchanger to be very low, and it is impossible to raise the temperature of the outdoor heat exchanger to the level where frosting can be eliminated in a short time. This situation will seriously affect the performance of the air conditioning system. Therefore, at this time, the judgment of the second defrosting condition is beneficial to ensuring that sufficient heat is provided in a timely manner through the operation of the third defrosting mode to melt the frost on the outdoor heat exchanger cleanly, thereby improving the defrosting effect.

[0199] When the air conditioner meets Condition 3, both the indoor and outdoor environmental temperatures are very low. If the preset defrosting mode is used for defrosting, the air conditioner cannot absorb enough heat from the environment for defrosting, resulting in low defrosting efficiency and high energy consumption. At this time, the judgment of the second defrosting condition is carried out, which is beneficial to ensuring that enough heat can be provided in time through the operation of the third defrosting mode to melt the frost on the outdoor heat exchanger cleanly, thereby improving the defrosting effect.

[0200] When the air conditioner meets Condition 4, when the outdoor environment is low temperature and high humidity, the outdoor heat exchanger frosts quickly. At this time, the temperature of the outdoor heat exchanger changes greatly. When the heating operation time is relatively long, when it is detected that the temperature of the outdoor heat exchanger drops rapidly and / or the temperature of the outdoor heat exchanger is too low, it can be considered that the outdoor heat exchanger is severely frosted at this time. Therefore, the judgment of the second defrosting condition at this time is beneficial to ensuring that enough heat can be provided in time through the operation of the third defrosting mode to melt the frost on the outdoor heat exchanger cleanly, thereby improving the defrosting effect.

[0201] When the air conditioner meets Condition 5, when the defrosting operation is entered after the heating operation has not reached the defrosting condition for a long time, the judgment of the second defrosting condition at this time is beneficial to ensuring that enough heat can be provided in time through the operation of the third defrosting mode to melt the frost on the outdoor heat exchanger cleanly, thereby improving the defrosting effect.

[0202] In this embodiment, through the above method, it is beneficial to accurately determine whether the air conditioner needs to perform reverse defrosting based on preset conditions, ensuring that enough heat can be provided for the outdoor heat exchanger during the defrosting process to melt the frost on the outdoor heat exchanger, so as to improve the defrosting effect.

[0203] Further, based on any of the above embodiments, another optional embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, referring to Figure 8 , the control method of the air conditioner further includes:

[0204] Step S100, when the air conditioner is in the first mode, obtain the environmental parameters of the environment where the heating component is located;

[0205] The first mode includes a refrigeration mode, a third defrosting mode, or a dehumidification mode.

[0206] In this embodiment, when the air conditioner is in the first mode, the reversing component operates in the first operating state, the one-way throttle valve throttles and reduces the pressure of the flowing refrigerant, and the refrigerant flowing out of the compressor flows through the outdoor heat exchanger, the electronic expansion valve, the refrigerant heat dissipation pipe, the one-way throttle valve, and the indoor heat exchanger in sequence and then flows into the suction port of the compressor. Specifically, the refrigerant flow direction is as Figure 1As shown by the solid line in []. Among them, the indoor heat exchanger is in the evaporation state, and the outdoor heat exchanger is in the condensation state. In the third defrosting mode, the high-temperature refrigerant in the outdoor heat exchanger can release heat to melt the frost on its surface; in the refrigeration mode, the indoor heat exchanger releases cold to reduce the indoor temperature; in the dehumidification mode, dew condensation occurs on the surface of the indoor heat exchanger to reduce the indoor humidity.

[0207] The environmental parameters may include at least one of the following: environmental temperature, environmental humidity, environmental enthalpy value, and so on.

[0208] Step S200, determining the minimum opening degree of the electronic expansion valve according to the environmental parameters;

[0209] The minimum opening degree is the minimum value of the opening degree allowed for the electronic expansion valve when ensuring that the heating component does not condense.

[0210] Different environmental parameters correspond to different minimum opening degrees. In this embodiment, the environmental parameter includes the environmental temperature, and the minimum opening degree and the environmental temperature may be positively correlated. Specifically, in this embodiment, the environmental temperature and the minimum opening degree are linearly positively correlated. In other embodiments, the environmental temperature may also be non-linearly correlated with the minimum opening degree. The lower the environmental temperature, the lower the dew point temperature of the environment where the heating component is located, and the lower the temperature of the refrigerant flowing into the refrigerant heat dissipation pipe can be allowed without causing condensation of the heating component, so the corresponding minimum opening degree can be smaller; the higher the environmental temperature, the higher the dew point temperature of the environment where the heating component is located, and the higher the temperature of the refrigerant flowing into the refrigerant heat dissipation pipe is required to ensure that the heating component does not condense, so the corresponding minimum opening degree needs to be larger.

[0211] The corresponding relationship between the environmental parameters and the minimum opening degree can be preset, and the corresponding relationship may include forms such as calculation formulas, mapping relationships, etc. Based on this corresponding relationship, the minimum opening degree corresponding to the current environmental parameters can be determined.

[0212] In one implementation manner, the temperature range where the environmental parameters are located can be determined, and the minimum opening degree can be determined according to the temperature range. In another implementation manner, the environmental parameters can be substituted into a preset formula to calculate the minimum opening degree. In still another implementation manner, the environmental parameters can be queried in a preset mapping table, and the opening degree matched in the mapping table is used as the minimum opening degree here.

[0213] Step S300, controlling the electronic expansion valve to operate at a greater than or equal to the minimum opening degree.

[0214] The target operating opening degree of the electronic expansion valve in the first mode can be determined according to the actual operating conditions of the air conditioner. For example, it can be determined according to at least one parameter such as the temperature of the heating component, the above environmental parameters, the temperature of the refrigerant flowing out of the outdoor heat exchanger, the temperature of the indoor heat exchanger, etc. Or, the target operating opening degree of the electronic expansion valve can also be a preset fixed opening degree.

[0215] When the target operating opening degree of the electronic expansion valve is greater than or equal to the minimum opening degree, control the electronic expansion valve to operate at the target operating opening degree. When the target operating opening degree of the electronic expansion valve is less than the minimum opening degree, control the electronic expansion valve to operate at the minimum opening degree.

[0216] In this embodiment, in the first mode, the minimum opening degree of the electronic expansion valve is determined according to the ambient temperature of the environment where the heating component is located. The operating opening degree of the electronic expansion valve is not allowed to be less than the determined minimum opening degree, so as to ensure that the opening degree of the electronic expansion valve will not be too small, resulting in the temperature of the refrigerant flowing into the refrigerant heat dissipation pipe being lower than the dew point temperature of the environment where the heating component is located, and the adjustment range of the temperature of the refrigerant flowing into the refrigerant heat dissipation pipe can be increased to ensure the heat dissipation effect of the heating component, thereby reducing the condensation risk of the heating component while dissipating heat from the heating component, so as to effectively ensure the use safety of the heating component and the whole air conditioner. Moreover, compared with the electronic expansion valve operating at a fixed opening degree, it is beneficial to reduce the temperature of the refrigerant flowing into the indoor heat exchanger and the heat dissipation effect of the heating component, so as to improve the refrigeration effect of the air conditioner while dissipating heat from the heating component.

[0217] Furthermore, in this embodiment, the environmental parameter includes the ambient temperature, and the step of determining the minimum opening degree of the electronic expansion valve according to the environmental parameter includes: when the ambient temperature is less than or equal to the first preset ambient temperature, determining the first opening degree as the minimum opening degree; when the ambient temperature is greater than the second preset ambient temperature, determining the second opening degree as the minimum opening degree; when the ambient temperature is greater than the first preset ambient temperature and less than or equal to the second preset ambient temperature, determining the minimum opening degree according to the ambient temperature, and the minimum opening degree is positively correlated with the ambient temperature; wherein, the second opening degree is greater than the first opening degree, and the second preset ambient temperature is greater than the first preset ambient temperature.

[0218] The first opening degree and / or the second opening degree can be the minimum opening degree allowed by the performance of the electronic expansion valve itself and / or the reliable operation of the air conditioner. The first opening degree and / or the second opening degree can be a preset fixed opening degree, or an opening degree determined according to the actual operating conditions of the air conditioner.

[0219] When the ambient temperature is greater than the first preset ambient temperature and less than or equal to the second preset ambient temperature, determine the minimum opening degree according to the ambient temperature in the preset opening degree interval, the minimum value of the preset opening degree interval is greater than the first opening degree, and the maximum value of the preset opening degree interval is less than the second opening degree.

[0220] In this embodiment, when the ambient temperature is greater than the first preset ambient temperature and less than or equal to the second preset ambient temperature, the ambient temperature is substituted into the preset relational expression between the minimum opening and the ambient temperature to calculate the minimum opening. In this embodiment, the preset relational expression is Lmin = a*T4 + b, where a and b are pre-configured constants, T4 is the ambient temperature, and Lmin is the minimum opening. For example, if a is 2.5, b is 320, then when T4 is 30°C, the calculated minimum opening is 395.

[0221] In this embodiment, through the above method, it can be ensured that when the ambient temperature is relatively high and the condensation risk is relatively large, the minimum opening allowed for the electronic expansion valve to operate is relatively large; when the ambient temperature is relatively low and the condensation risk is relatively small, the minimum opening allowed for the electronic expansion valve to operate is relatively small. Thus, it can effectively prevent the temperature of the heat-generating component from being lower than the dew point temperature of its surrounding environment when the heat-generating component exchanges heat with the refrigerant heat exchange tube, realizing heat dissipation of the heat-generating component while effectively reducing the condensation risk of the heat-generating component.

[0222] In addition, an embodiment of the present invention further provides a storage medium, on which a control program of an air conditioner is stored. When the control program of the air conditioner is executed by a processor, the relevant steps of any one of the above embodiments of the control method of the air conditioner are implemented.

[0223] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0224] The serial numbers of the above embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0225] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0226] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. An air conditioner, characterized in that, The air conditioner includes a compressor, a reversing component, an indoor heat exchanger, a one-way throttle valve, a refrigerant heat dissipation pipe, an electronic expansion valve, and an outdoor heat exchanger that are connected in sequence. The refrigerant heat dissipation pipe is arranged to be heat-exchanged and connected with a heating component. The one-way throttle valve is arranged to throttle the refrigerant unidirectionally when the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger. The indoor heat exchanger, the compressor, and the outdoor heat exchanger are all connected to the reversing component; The air conditioner has a first mode, a second mode, and a preset defrosting mode. In the first mode, the reversing component controls the refrigerant to flow from the outdoor heat exchanger to the indoor heat exchanger, and the one-way throttle valve is in a throttling state; In the second mode, the reversing component controls the refrigerant to flow from the indoor heat exchanger to the outdoor heat exchanger, and the electronic expansion valve operates at a throttling opening degree; In the preset defrosting mode, the reversing component controls the refrigerant to flow from the indoor heat exchanger to the outdoor heat exchanger, and the electronic expansion valve operates at an opening degree greater than the throttling opening degree.

2. The air conditioner according to claim 1, characterized in that, The throttling effect of the one-way throttle valve increases with the increase of the pressure difference between both ends of the one-way throttle valve.

3. The air conditioner according to claim 1 or 2, characterized in that, The electronic expansion valve is at least provided with a first opening degree interval and a second opening degree interval. The opening degree of the first opening degree interval is smaller than that of the second opening degree interval. When the opening degree is within the first opening degree interval, the change rate of the flow rate of the electronic expansion valve with the change of the opening degree is smaller than the change rate of the flow rate of the electronic expansion valve with the change of the opening degree when the opening degree is within the second opening degree interval.

4. A control method for an air conditioner, characterized in that, Based on the air conditioner according to any one of claims 1 to 3, the control method of the air conditioner includes: Controlling the air conditioner to operate in the second mode; When the air conditioner meets the first defrosting condition, controlling the air conditioner to start the preset defrosting mode.

5. The control method of the air conditioner according to claim 4, characterized in that, The first defrosting condition includes a first sub-condition or a second sub-condition. The step of controlling the air conditioner to start the preset defrosting mode when the air conditioner meets the first defrosting condition includes: When the air conditioner meets the first sub-condition, controlling the electronic expansion valve to increase from the throttling opening degree to a first target opening degree for operation; When the air conditioner meets the second sub-condition, controlling the electronic expansion valve to increase from the throttling opening degree to a second target opening degree for operation; Wherein, the frosting thickness of the outdoor heat exchanger represented by the first sub-condition is smaller than the frosting thickness of the outdoor heat exchanger represented by the second sub-condition, and the first target opening degree is smaller than the second target opening degree.

6. The control method of the air conditioner according to claim 4, characterized in that, Before the step of controlling the air conditioner to start the preset defrosting mode, it further includes: When the air conditioner meets the first defrosting condition, determining an opening degree adjustment parameter according to the current throttling opening degree of the electronic expansion valve and the target opening degree of the electronic expansion valve in the preset defrosting mode; The step of controlling the air conditioner to start the preset defrosting mode includes: Controlling the electronic expansion valve to increase from the throttling opening degree to the target opening degree according to the opening degree adjustment parameter.

7. The control method of the air conditioner according to claim 6, characterized in that, The step of determining the opening degree adjustment parameter according to the current throttling opening degree of the electronic expansion valve and the target opening degree of the electronic expansion valve in the preset mode includes: Determine the opening deviation amount between the target opening and the throttling opening; Determine the opening adjustment amplitude per unit time according to the opening deviation amount and the preset number of adjustment times. The opening adjustment parameter includes the opening adjustment amplitude.

8. The control method of the air conditioner according to claim 4, characterized in that, After the step of controlling the air conditioner to start the preset defrosting mode, the following steps are further included: When the continuous duration of the electronic expansion valve operating at the changed opening is greater than or equal to the first preset duration, determine whether the air conditioner operates to meet the defrosting end condition. When the air conditioner operates to meet the defrosting end condition, control the air conditioner to operate in the second mode; When the continuous duration of the electronic expansion valve operating at the changed opening is less than the first preset duration, control the air conditioner to maintain the current defrosting state.

9. The control method of the air conditioner according to claim 8, wherein, The defrosting end condition includes that the temperature of the outdoor heat exchanger is greater than or equal to the first temperature threshold, or the defrosting duration of the preset defrosting mode is greater than the second preset duration.

10. The control method of the air conditioner according to claim 9, characterized in that, Before the step of determining whether the air conditioner operates to meet the defrosting end condition, the following steps are further included: Determine the first temperature threshold according to the temperature state parameter of the environment where the outdoor heat exchanger is located.

11. The control method of the air conditioner according to claim 10, characterized in that, The temperature state parameter includes the current temperature and the temperature change trend. The step of determining the first temperature threshold according to the temperature state parameter of the environment where the outdoor heat exchanger is located includes: Determine the second temperature threshold according to the temperature change trend; When the current temperature is less than or equal to the second temperature threshold, determine the first temperature as the first temperature threshold; When the current temperature is greater than the second temperature threshold, determine the second temperature as the first temperature threshold; Wherein, the first temperature is less than the second temperature.

12. The control method of the air conditioner according to claim 11, characterized in that, The step of determining the second temperature threshold according to the temperature change trend includes: When the temperature change trend is rising, determine the third temperature as the second temperature threshold; When the temperature change trend is falling, determine the fourth temperature as the second temperature threshold; Wherein, the third temperature is greater than the fourth temperature.

13. The control method of the air conditioner according to claim 9, wherein, The preset defrosting mode includes the first defrosting mode or the second defrosting mode. When the first defrosting mode is started, the frosting thickness of the outdoor heat exchanger is less than the frosting thickness of the outdoor heat exchanger when the second defrosting mode is started; The first temperature threshold corresponding to the first defrosting mode is less than the first temperature threshold corresponding to the second defrosting mode, and / or the second preset duration corresponding to the first defrosting mode is less than the second preset duration corresponding to the second defrosting mode.

14. The control method of the air conditioner according to claim 4, characterized in that, Before the step of controlling the air conditioner to start the preset defrosting mode when the air conditioner meets the first defrosting condition, the following steps are further included: Obtain the temperature change parameter of the outdoor heat exchanger in the second mode; Judge whether the air conditioner meets the first defrosting condition according to the temperature change parameter.

15. The control method of the air conditioner according to claim 14, wherein The step of obtaining the temperature change parameter of the outdoor heat exchanger in the second mode includes: Obtain the first temperature change value of the outdoor heat exchanger after the second mode is started and the second temperature change value of the environment where the outdoor heat exchanger is located; Determine a correction coefficient according to the first temperature change value and / or the second temperature change value; Correct the second temperature change value according to the correction coefficient to obtain a target temperature correction value; Correct the first temperature change value according to the target temperature correction value to obtain the temperature change parameter.

16. The control method of the air conditioner according to claim 4, characterized in that, The first mode includes a third defrosting mode. After the step of controlling the air conditioner to operate in the second mode, the method further includes: Judge whether the air conditioner meets a preset condition; When the air conditioner does not meet the preset condition, execute the step of controlling the air conditioner to operate in the preset defrosting mode when the air conditioner meets the first defrosting condition; When the air conditioner meets the preset condition and the second defrosting condition, control the air conditioner to operate in the third defrosting mode; Wherein, the preset condition indicates that the third defrosting mode has a startup requirement, and the first defrosting condition indicates that the frosting thickness of the outdoor heat exchanger is less than the frosting thickness of the outdoor heat exchanger indicated by the second defrosting condition.

17. The control method of the air conditioner according to claim 16, characterized in that, The preset condition includes at least one of the following conditions: The temperature of the environment where the indoor heat exchanger is located is less than a first preset temperature; The temperature of the environment where the outdoor heat exchanger is located is less than a second preset temperature; The total temperature of the temperature of the environment where the indoor heat exchanger is located and the temperature of the environment where the outdoor heat exchanger is located is less than a third preset temperature; The temperature change parameter of the outdoor heat exchanger after the second mode is started is greater than a preset change parameter; The temperature of the environment where the outdoor heat exchanger is located is less than a fourth preset temperature, and the duration that the air conditioner does not operate in the defrosting mode reaches a third preset duration.

18. The control method of an air conditioner according to any one of claims 4 to 17, characterized in that, The control method of the air conditioner further includes: When the air conditioner is in the first mode, obtain the environmental parameters of the environment where the heating component is located; Determine the minimum opening degree of the electronic expansion valve according to the environmental parameters; Control the electronic expansion valve to operate at a minimum opening degree greater than or equal to the determined value.

19. The control method of the air conditioner according to claim 18, wherein, The environmental parameters include the environmental temperature. The step of determining the minimum opening degree of the electronic expansion valve according to the environmental parameters includes: When the environmental temperature is less than or equal to a first preset environmental temperature, determine a first opening degree as the minimum opening degree; When the environmental temperature is greater than a second preset environmental temperature, determine a second opening degree as the minimum opening degree; When the environmental temperature is greater than the first preset environmental temperature and less than or equal to the second preset environmental temperature, determine the minimum opening degree according to the environmental temperature, and the minimum opening degree is positively correlated with the environmental temperature; Wherein, the second opening degree is greater than the first opening degree, and the second preset environmental temperature is greater than the first preset environmental temperature.

20. An air conditioner, characterized in that, The air conditioner includes a control device, a compressor, a commutation component, and an indoor heat exchanger, a one-way throttle valve, a refrigerant heat dissipation pipe, an electronic expansion valve, and an outdoor heat exchanger that are connected in sequence. The refrigerant heat dissipation pipe is arranged to be heat-exchanged and connected with a heating component. The one-way throttle valve is arranged to throttle unidirectionally when the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger. The indoor heat exchanger, the compressor, and the outdoor heat exchanger are all connected to the commutation component; The commutation component and the electronic expansion valve are both connected to the control device, and the control device includes: a memory, a processor, and a control program of the air conditioner stored on the memory and executable on the processor. When the control program of the air conditioner is executed by the processor, the steps of the control method of the air conditioner according to any one of claims 4 to 19 are implemented.

21. The air conditioner according to claim 20, wherein, The throttling effect of the one-way throttle valve increases with the increase of the pressure difference across the one-way throttle valve. And / or, the electronic expansion valve is at least provided with a first opening range and a second opening range, the opening of the first opening range is smaller than that of the second opening range, and the change rate of the flow rate of the electronic expansion valve with the change of the opening when the opening is within the first opening range is smaller than the change rate of the flow rate of the electronic expansion valve with the change of the opening when the opening is within the second opening range.

22. A storage medium, characterized in that, A control program of the air conditioner is stored on the storage medium. When the control program of the air conditioner is executed by the processor, the steps of the control method of the air conditioner according to any one of claims 4 to 19 are implemented.

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