Air conditioner and its control method and storage medium

Abstract

The present application discloses an air conditioner, a control method thereof and a storage medium. Among them, the air conditioner includes: an indoor heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve connected through a refrigerant pipeline, and the air conditioner further includes: a first electronic expansion valve, a second electronic expansion valve and a heat recovery device. The method includes: determining that the air conditioner is operating in the cooling mode and adjusting the opening degree of the first electronic expansion valve based on the heat recovery effect of the heat recovery device; or determining that the air conditioner is operating in the heating mode and adjusting the opening degree of the second electronic expansion valve based on the heat recovery effect of the heat recovery device. The embodiments of the present application can make the heat recovery effect of the heat recovery device match the operating conditions of the air conditioner, which is beneficial to further improving the operating energy efficiency of the air conditioner.

Description

Technical Field

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

[0002] With the progress of science and technology, air conditioners, as electrical devices for adjusting the ambient temperature, have been widely used. Refrigeration and heating are the most basic functions of air conditioners. How to improve the refrigeration and heating effects of air conditioners directly determines the competitiveness of air conditioner manufacturers.

[0003] In related technologies, there is a design that exchanges heat between the low-temperature and low-pressure refrigerant in the compressor suction pipeline and the high-temperature and high-pressure refrigerant in the condenser outlet pipeline, so as to achieve the purpose of increasing the compressor suction temperature while reducing the subcooling degree of the refrigerant at the condenser outlet. For example, in a refrigerator refrigeration system, there is a way of welding the capillary tube and the compressor suction pipeline in parallel for heat exchange. For an air conditioning system, adopting a similar method is effective for the refrigeration cycle, but for the heating cycle of a heating and cooling air conditioner, this heat recovery design will cause the inlet temperature of the indoor heat exchanger to decrease, resulting in a poor heating effect. Summary of the Invention

[0004] In view of this, the embodiments of the present application provide an air conditioner, a control method thereof, and a storage medium, aiming to optimize the heat recovery design of the refrigerant in the heating cycle and the refrigeration cycle of the air conditioner and improve the operation effect of the air conditioner.

[0005] The technical solution of the embodiments of the present application is implemented as follows:

[0006] In a first aspect, the embodiments of the present application provide a control method for an air conditioner. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a four-way valve for realizing the switching between the refrigeration mode and the heating mode, which are connected through a refrigerant pipeline. The air conditioner further includes: a first electronic expansion valve and a second electronic expansion valve, which are arranged on the refrigerant pipeline and located between the outdoor heat exchanger and the indoor heat exchanger; a heat recovery device, which is located between the first electronic expansion valve and the second electronic expansion valve, and between the four-way valve and the suction port of the compressor, and is used for exchanging heat between the refrigerant on the refrigerant pipeline between the first electronic expansion valve and the second electronic expansion valve and the refrigerant on the refrigerant pipeline between the four-way valve and the suction port of the compressor. The method includes:

[0007] Determine that the air conditioner is operating in the refrigeration mode, and adjust the opening degree of the first electronic expansion valve based on the heat recovery effect of the heat recovery device; or,

[0008] Determine that the air conditioner is operating in the heating mode, and adjust the opening degree of the second electronic expansion valve based on the heat recovery effect of the heat recovery device.

[0009] In some embodiments, in the refrigeration mode, adjusting the opening degree of the first electronic expansion valve based on the regenerative effect of the regenerative device includes:

[0010] Obtaining a first parameter characterizing the regenerative effect of the regenerative device;

[0011] Judging the regenerative effect of the regenerative device based on the first parameter and a set first threshold;

[0012] If it is determined that the regenerative device has insufficient regeneration, controlling the first electronic expansion valve to increase the opening degree;

[0013] If it is determined that the regenerative device has excessive regeneration, controlling the first electronic expansion valve to decrease the opening degree.

[0014] In some embodiments, the first parameter is the suction temperature of the compressor. Correspondingly, the set first threshold is a temperature range. Judging the regenerative effect of the regenerative device based on the first parameter and the set first threshold includes:

[0015] If the current suction temperature of the compressor is greater than the upper limit value of the temperature range, it is determined that the regenerative device has excessive regeneration;

[0016] If the current suction temperature of the compressor is less than the lower limit value of the temperature range, it is determined that the regenerative device has insufficient regeneration;

[0017] If the current suction temperature of the compressor falls within the temperature range, it is determined that the regenerative device has appropriate regeneration.

[0018] In some embodiments, the method further includes:

[0019] Obtaining a second parameter characterizing the operating state of the air conditioner;

[0020] Determining the current set first threshold based on the current second parameter and a pre-set mapping relationship between the second parameter and the set first threshold.

[0021] In some embodiments, in the refrigeration mode, the method further includes:

[0022] Adjusting the opening degree of the second electronic expansion valve based on the current second parameter.

[0023] In some embodiments, adjusting the opening degree of the second electronic expansion valve based on the current second parameter includes:

[0024] Determine the target opening degree of the second electronic expansion valve based on the current second parameter and the pre-set mapping relationship between the second parameter and the opening degree of the second electronic expansion valve;

[0025] Adjust the opening degree of the second electronic expansion valve to the target opening degree.

[0026] In some embodiments, in the heating mode, the adjusting the opening degree of the second electronic expansion valve based on the heat recovery effect of the heat recovery device includes:

[0027] Obtain a first parameter characterizing the heat recovery effect of the heat recovery device;

[0028] Judge the heat recovery effect of the heat recovery device based on the first parameter and a set second threshold;

[0029] If it is determined that the heat recovery of the heat recovery device is insufficient, control the second electronic expansion valve to increase the opening degree;

[0030] If it is determined that the heat recovery of the heat recovery device is excessive, control the second electronic expansion valve to decrease the opening degree.

[0031] In some embodiments, the first parameter is the suction temperature of the compressor, and correspondingly, the set second threshold is a temperature range; the judging the heat recovery effect of the heat recovery device based on the first parameter and the set second threshold includes:

[0032] If the current suction temperature of the compressor is greater than the upper limit value of the temperature range, it is determined that the heat recovery of the heat recovery device is excessive;

[0033] If the current suction temperature of the compressor is less than the lower limit value of the temperature range, it is determined that the heat recovery of the heat recovery device is insufficient;

[0034] If the current suction temperature of the compressor falls within the temperature range, it is determined that the heat recovery of the heat recovery device is appropriate.

[0035] In some embodiments, the method further includes:

[0036] Obtain a second parameter characterizing the operating state of the air conditioner;

[0037] Determine the current set second threshold based on the current second parameter and the pre-set mapping relationship between the second parameter and the set second threshold.

[0038] In some embodiments, in the heating mode, the method further includes:

[0039] Adjust the opening degree of the first electronic expansion valve based on the current second parameter.

[0040] In some embodiments, adjusting the opening degree of the second electronic expansion valve based on the current second parameter includes:

[0041] Determining a target opening degree of the first electronic expansion valve based on the current second parameter and a pre-set mapping relationship between the second parameter and the opening degree of the first electronic expansion valve;

[0042] Adjusting the opening degree of the first electronic expansion valve to the target opening degree.

[0043] In a second aspect, an embodiment of the present application provides an air conditioner. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a four-way valve for realizing the switching between a refrigeration mode and a heating mode, which are connected through a refrigerant pipeline. The air conditioner further includes: a first electronic expansion valve and a second electronic expansion valve, which are arranged on the refrigerant pipeline and located between the outdoor heat exchanger and the indoor heat exchanger; a heat recovery device, which is located between the first electronic expansion valve and the second electronic expansion valve, and between the four-way valve and the suction port of the compressor, and is used for performing heat exchange on the refrigerant on the refrigerant pipeline between the first electronic expansion valve and the second electronic expansion valve and the refrigerant on the refrigerant pipeline between the four-way valve and the suction port of the compressor; the air conditioner further includes: a processor and a memory for storing a computer program that can run on the processor. Among them,

[0044] The processor is configured to execute the steps of the method according to the embodiment of the present application when running the computer program.

[0045] In a third aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method according to the embodiment of the present application are implemented.

[0046] The technical solution provided by the embodiment of the present application arranges the first electronic expansion valve and the second electronic expansion valve on the refrigerant pipeline and locates them between the outdoor heat exchanger and the indoor heat exchanger; the heat recovery device is located between the first electronic expansion valve and the second electronic expansion valve, and between the four-way valve and the suction port of the compressor, and is used for performing heat exchange on the refrigerant on the refrigerant pipeline between the first electronic expansion valve and the second electronic expansion valve and the refrigerant on the refrigerant pipeline between the four-way valve and the suction port of the compressor, which can not only effectively recover the heat of the refrigerant in the refrigeration mode, but also effectively recover the heat of the refrigerant in the heating mode, thereby effectively improving the operation effect of the air conditioner in the heating mode and the refrigeration mode; in addition, in the refrigeration mode, the opening degree of the first electronic expansion valve is adjusted based on the heat recovery effect of the heat recovery device; in the heating mode, the opening degree of the second electronic expansion valve is adjusted based on the heat recovery effect of the heat recovery device, which can make the heat recovery effect of the heat recovery device match the operating conditions of the air conditioner, and is beneficial to further improving the operating energy efficiency of the air conditioner. Description of the Drawings

[0047] Figure 1 It is a schematic diagram of the principle of the refrigeration cycle of an air conditioner in the related art;

[0048] Figure 2 It is a schematic diagram of the principle of the heating cycle of an air conditioner in the related art;

[0049] Figure 3 It is a schematic diagram of the principle of the refrigeration cycle of the air conditioner according to the embodiment of the present application;

[0050] Figure 4 It is a schematic diagram of the principle of the heating cycle of the air conditioner according to the embodiment of the present application;

[0051] Figure 5 It is a schematic flow chart of the control method of the air conditioner according to the embodiment of the present application;

[0052] Figure 6 It is a schematic flow chart of the control method of the air conditioner in an application example of the present application;

[0053] Figure 7 It is a schematic structural diagram of the air conditioner according to the embodiment of the present application.

[0054] Description of the reference numerals:

[0055] 1. Refrigerant pipeline; 2. Indoor heat exchanger; 3. Outdoor heat exchanger; 4. Compressor; 5. Four-way valve;

[0056] 6. Electronic expansion valve; 7. Accumulator; 8. First electronic expansion valve;

[0057] 9. Second electronic expansion valve; 10. Regeneration device. Detailed Description of the Embodiments

[0058] The present application will be further described in detail below with reference to the drawings and embodiments.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0060] The air conditioner according to the embodiment of the present application is used to adjust the temperature, humidity, etc. of the surrounding environment. The air conditioner is a dual-purpose air conditioner for heating and cooling (also known as a heat pump air conditioner), that is, based on the commutation function of the four-way valve, the functions of the evaporator and condenser of the air conditioner can be interchanged with each other, so as to change the function of cooling the indoor air to heating the indoor air. Exemplarily, the air conditioner can extract heat from the low-temperature outdoor air in winter to heat the indoor air, and can remove the heat of the indoor air and transfer it to the outdoor air in summer.

[0061] In the related art, the refrigeration cycle of a heat pump air conditioner is as follows Figure 1 As shown, the refrigerant (also known as the refrigerant) on the refrigerant pipeline 1 sequentially forms a cycle through the exhaust port of the compressor 4, the four-way valve 5, the outdoor heat exchanger 3, the electronic expansion valve 6, the indoor heat exchanger 2, the four-way valve 5, the accumulator 7, and the suction port of the compressor 4. Exemplarily, the low-temperature and low-pressure refrigerant from the indoor heat exchanger 2 enters the accumulator 7 through the four-way valve 5. After separating the liquid, the gaseous refrigerant is sucked into the compressor 4 and compressed into a high-temperature and high-pressure gas and discharged. The gas enters the outdoor heat exchanger 3 through the four-way valve 5 to release heat and condenses into a liquid refrigerant. The liquid refrigerant becomes a low-temperature and low-pressure two-phase fluid after being depressurized by the electronic expansion valve 6 and enters the indoor heat exchanger 2 to evaporate and absorb heat (at this time, the indoor air is cooled), and then enters the next cycle through the four-way valve 5 and the accumulator 7 again.

[0062] The heating cycle of the heat pump air conditioner is as follows Figure 2 As shown, the refrigerant on the refrigerant pipeline 1 sequentially forms a cycle through the exhaust port of the compressor 4, the four-way valve 5, the indoor heat exchanger 2, the electronic expansion valve 6, the outdoor heat exchanger 3, the four-way valve 5, the accumulator 7, and the suction port of the compressor 4. Exemplarily, the low-temperature and low-pressure refrigerant from the outdoor heat exchanger 3 enters the accumulator 7 through the four-way valve 5. After separating the liquid, the gaseous refrigerant is sucked into the compressor 4 and compressed into a high-temperature and high-pressure gas and discharged. The gas enters the indoor heat exchanger 2 through the four-way valve 5 to release heat (at this time, the indoor air is heated) and condenses into a liquid refrigerant. The liquid refrigerant becomes a low-temperature and low-pressure two-phase fluid after being depressurized by the electronic expansion valve 6 and enters the outdoor heat exchanger 3 to evaporate and absorb heat, and then enters the next cycle through the four-way valve 5 and the accumulator 7 again.

[0063] As Figure 2 shown, when the heating cycle is operated in a conventional heat recovery mode, that is Figure 2 heat exchange is carried out between the two fluid paths in the dotted box in, it can be seen that the high-temperature and high-pressure gas flowing out of the exhaust port of the compressor 4 through the four-way valve 5 is cooled by the relatively low-temperature refrigerant flowing out of the indoor heat exchanger 2 before entering the indoor heat exchanger 2, resulting in a decrease in the inlet temperature of the indoor heat exchanger 2 and making the heating effect on the indoor side worse.

[0064] Based on this, an embodiment of the present application provides an air conditioner, as Figure 3 and as Figure 4 shown, the air conditioner includes: an indoor heat exchanger 2, an outdoor heat exchanger 3, a compressor 4 connected through a refrigerant pipeline 1, and a four-way valve 5 for realizing the switching between the refrigeration mode and the heating mode. The air conditioner further includes: a first electronic expansion valve 8, a second electronic expansion valve 9, and a heat recovery device 10.

[0065] In the embodiment of the present application, the first electronic expansion valve 8 and the second electronic expansion valve 9 are arranged on the refrigerant pipeline 1 and located between the outdoor heat exchanger 3 and the indoor heat exchanger 2; the heat recovery device 10 is located between the first electronic expansion valve 8 and the second electronic expansion valve 9, and between the four-way valve 5 and the suction port of the compressor 4, and is used for heat exchange of the refrigerant on the refrigerant pipeline 1 between the first electronic expansion valve 8 and the second electronic expansion valve 9 and the refrigerant on the refrigerant pipeline 1 between the four-way valve 5 and the suction port of the compressor 4.

[0066] Here, the heat recovery device 10 can use the low-temperature and low-pressure refrigerant between the four-way valve 5 and the suction port of the compressor 4 to cool the high-pressure refrigerant at the outlet of the high-pressure side heat exchanger, so that the refrigerant at the outlet of the high-pressure side heat exchanger obtains a greater degree of subcooling, which is beneficial to improving the operating performance of the air conditioner and enhancing the cycle energy efficiency.

[0067] It should be noted that during the refrigeration cycle, the high-pressure side heat exchanger is the outdoor heat exchanger 3, and during the heating cycle, the high-pressure side heat exchanger is the indoor heat exchanger 2. The degree of subcooling refers to the difference between the temperature of the refrigerant at the outlet of the high-pressure side heat exchanger and the saturation temperature of the refrigerant in the same pressure state. Increasing the degree of subcooling is beneficial to the improvement of the cycle energy efficiency.

[0068] It can be understood that whether in the refrigeration mode or the heating mode, the low-temperature and low-pressure refrigerant fluid in the heat recovery device 10 is the fluid in the suction pipeline of the compressor 4. Another high-pressure refrigerant in the heat recovery device 10 is the fluid between the outdoor heat exchanger 3 and the indoor heat exchanger 2. Specifically, it is the refrigerant fluid between the outlet of the high-pressure side heat exchanger and the throttling device. Since the flow direction of this part of the fluid is opposite in the refrigeration and heating modes, in the embodiment of the present application, the first electronic expansion valve 8 and the second electronic expansion valve 9 are arranged on the refrigerant pipeline 1 between the indoor heat exchanger 2 and the outdoor heat exchanger 3, and the heat recovery device 10 is located between the first electronic expansion valve 8 and the second electronic expansion valve 9, and between the four-way valve 5 and the suction port of the compressor 4, and is used for heat exchange of the refrigerant (i.e., high-pressure refrigerant) on the refrigerant pipeline 1 between the first electronic expansion valve 8 and the second electronic expansion valve 9 and the refrigerant (i.e., low-temperature and low-pressure refrigerant) on the refrigerant pipeline 1 between the four-way valve 5 and the suction port of the compressor 4, which can not only realize the effective heat recovery of the refrigerant in the refrigeration mode, but also realize the effective heat recovery of the refrigerant in the heating mode, and has a simple structure, thus effectively improving the operating effects of the air conditioner in the heating mode and the refrigeration mode.

[0069] It can be understood that the heat recovery device 10 can be a heat conduction structure for heat conduction of the refrigerant pipeline 1 between the first electronic expansion valve 8 and the second electronic expansion valve 9 and the refrigerant pipeline 1 between the four-way valve 5 and the suction port of the compressor 4. For example, it can be a heat conduction box body or a sleeve through which the pipelines of the aforementioned two refrigerant flows pass through. The embodiment of the present application does not specifically limit the structure of the heat recovery device 10, as long as it can play a role in heat conduction.

[0070] Exemplarily, for a split room air conditioner, the heat recovery device 10 can be arranged on the outdoor side.

[0071] It can be understood that in the cooling mode, as Figure 3 shown, the refrigerant in the refrigerant pipeline 1 sequentially forms a cycle through the exhaust port of the compressor 4, the four-way valve 5, the outdoor heat exchanger 3, the first electronic expansion valve 8, the second electronic expansion valve 9, the indoor heat exchanger 2, the four-way valve 5, and the suction port of the compressor 4.

[0072] Exemplarily, a liquid receiver 7 is arranged at the suction port of the compressor 4. The liquid receiver 7 can separate the gas and liquid of the refrigerant in the refrigerant pipeline 1, so as to only introduce the gaseous refrigerant into the suction port of the compressor 4. Correspondingly, the heat recovery device 10 can be located on the refrigerant pipeline 1 between the four-way valve 5 and the liquid receiver 7, and is used for heat exchange between the high-pressure refrigerant at the outlet of the outdoor heat exchanger 3 (equivalent to a condenser) on the refrigerant pipeline 1 and the low-temperature and low-pressure refrigerant led out from the outlet of the indoor heat exchanger 2 (equivalent to an evaporator) on the refrigerant pipeline 1, which is beneficial to increasing the temperature of the refrigerant at the suction port of the compressor 4 and is also beneficial to increasing the subcooling degree of the high-pressure refrigerant.

[0073] It can be understood that in the heating mode, as Figure 4 shown, the refrigerant in the refrigerant pipeline 1 sequentially forms a cycle through the exhaust port of the compressor 4, the four-way valve 5, the indoor heat exchanger 2, the second electronic expansion valve 9, the first electronic expansion valve 8, the outdoor heat exchanger 3, the four-way valve 5, and the suction port of the compressor 4.

[0074] Exemplarily, a liquid receiver 7 is arranged at the suction port of the compressor 4. The liquid receiver 7 can separate the gas and liquid of the refrigerant in the refrigerant pipeline 1, so as to only introduce the gaseous refrigerant into the suction port of the compressor 4. Correspondingly, the heat recovery device 10 can be located on the refrigerant pipeline 1 between the four-way valve 5 and the liquid receiver 7, and is used for heat exchange between the high-pressure refrigerant at the outlet of the indoor heat exchanger 2 (equivalent to a condenser) on the refrigerant pipeline 1 and the low-temperature and low-pressure refrigerant led out from the outlet of the outdoor heat exchanger 3 (equivalent to an evaporator) on the refrigerant pipeline 1, which is beneficial to increasing the temperature of the refrigerant at the suction port of the compressor 4 and is also beneficial to increasing the subcooling degree of the high-pressure refrigerant.

[0075] Here, both the first electronic expansion valve 8 and the second electronic expansion valve 9 are throttling elements that can control the refrigerant flow according to a preset program, that is, the opening degree (also called valve steps) of each electronic expansion valve can be adjusted.

[0076] In practical applications, due to the different heat recovery effects of the heat recovery device 10 under different working conditions, from the perspective of energy efficiency, for the same heat recovery device, in some working conditions, the heat recovery is insufficient, and in some working conditions, the heat recovery is excessive, which are not conducive to improving the operating energy efficiency of the air conditioner.

[0077] Based on this, an embodiment of the present application provides a control method based on the aforementioned air conditioner, as Figure 5 shown, the control method includes:

[0078] Step 501, determine that the air conditioner is operating in the cooling mode, and adjust the opening degree of the first electronic expansion valve based on the heat recovery effect of the heat recovery device; or, determine that the air conditioner is operating in the heating mode, and adjust the opening degree of the second electronic expansion valve based on the heat recovery effect of the heat recovery device.

[0079] It can be understood that when the air conditioner is in the cooling mode, adjusting the opening degree of the first electronic expansion valve based on the heat recovery effect of the heat recovery device; when in the heating mode, adjusting the opening degree of the second electronic expansion valve based on the heat recovery effect of the heat recovery device can make the heat recovery effect of the heat recovery device match the operating conditions of the air conditioner, which is beneficial to further improving the operating energy efficiency of the air conditioner.

[0080] In some embodiments, when in the cooling mode, adjusting the opening degree of the first electronic expansion valve based on the heat recovery effect of the heat recovery device includes:

[0081] Obtain a first parameter characterizing the heat recovery effect of the heat recovery device;

[0082] Judge the heat recovery effect of the heat recovery device based on the first parameter and a set first threshold;

[0083] If it is determined that the heat recovery of the heat recovery device is insufficient, control the first electronic expansion valve to increase the opening degree;

[0084] If it is determined that the heat recovery of the heat recovery device is excessive, control the first electronic expansion valve to decrease the opening degree.

[0085] It can be understood that, as Figure 3 shown, when the heat recovery of the heat recovery device is insufficient, increase the opening degree of the first electronic expansion valve 8. For example, increase the opening degree of the first electronic expansion valve 8 based on the set opening degree size, so as to increase the refrigerant flow rate between the first electronic expansion valve 8 and the second electronic expansion valve 9 and the heat exchange temperature difference in the heat recovery device 10, and improve the heat recovery effect; when the heat recovery of the heat recovery device is excessive, decrease the opening degree of the first electronic expansion valve 8. For example, decrease the opening degree of the first electronic expansion valve 8 based on the set opening degree size, so as to decrease the refrigerant flow rate between the first electronic expansion valve 8 and the second electronic expansion valve 9 and the heat exchange temperature difference in the heat recovery device 10, and reduce the heat recovery effect.

[0086] In some embodiments, the first parameter is the suction temperature of the compressor. Correspondingly, the set first threshold is a temperature range. Judging the heat recovery effect of the heat recovery device based on the first parameter and the set first threshold includes:

[0087] If the current suction temperature of the compressor is greater than the upper limit value of the temperature range, it is determined that the heat recovery of the heat recovery device is excessive;

[0088] If the suction temperature of the current compressor is lower than the lower limit value of the temperature range, it is determined that the heat regeneration of the heat regeneration device is insufficient;

[0089] If the suction temperature of the current compressor falls within the temperature range, it is determined that the heat regeneration of the heat regeneration device is appropriate.

[0090] In some embodiments, the control method further includes:

[0091] Obtaining a second parameter characterizing the operating state of the air conditioner;

[0092] Determining a currently set first threshold based on the current second parameter and a pre-set mapping relationship between the second parameter and the set first threshold.

[0093] Here, the second parameter may include at least one of the following: the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, the indoor ambient temperature, and the outdoor ambient temperature.

[0094] Exemplarily, the pre-set mapping relationship between the second parameter and the set first threshold can be reasonably determined based on test data and pre-stored in the air conditioner.

[0095] In some embodiments, in the cooling mode, the control method further includes:

[0096] Adjusting the opening degree of the second electronic expansion valve based on the current second parameter.

[0097] Exemplarily, adjusting the opening degree of the second electronic expansion valve based on the current second parameter includes:

[0098] Determining the target opening degree of the second electronic expansion valve based on the current second parameter and a pre-set mapping relationship between the second parameter and the opening degree of the second electronic expansion valve;

[0099] Adjusting the opening degree of the second electronic expansion valve to the target opening degree.

[0100] Exemplarily, the pre-set mapping relationship between the second parameter and the opening degree of the second electronic expansion valve can be reasonably determined based on test data and pre-stored in the air conditioner.

[0101] In this way, the opening degree of the second electronic expansion valve can be matched with the operating conditions of the air conditioner, thereby ensuring a certain cooling capacity and energy efficiency.

[0102] In some embodiments, in the heating mode, adjusting the opening degree of the second electronic expansion valve based on the heat regeneration effect of the heat regeneration device includes:

[0103] Obtaining a first parameter characterizing the heat regeneration effect of the heat regeneration device;

[0104] Judge the regenerative effect of the regenerator based on the first parameter and the set second threshold value;

[0105] If it is determined that the regeneration of the regenerator is insufficient, control the second electronic expansion valve to increase the opening degree;

[0106] If it is determined that the regeneration of the regenerator is excessive, control the second electronic expansion valve to decrease the opening degree.

[0107] It can be understood that as Figure 4 shown, when the regeneration of the regenerator is insufficient, increase the opening degree of the second electronic expansion valve 9. For example, increase the opening degree of the second electronic expansion valve 9 based on the set opening degree size, so as to increase the refrigerant flow rate between the second electronic expansion valve 9 and the first electronic expansion valve 8 and the heat exchange temperature difference in the regenerator 10, and improve the regenerative effect; when the regeneration of the regenerator is excessive, decrease the opening degree of the second electronic expansion valve 9. For example, decrease the opening degree of the second electronic expansion valve 9 based on the set opening degree size, so as to decrease the refrigerant flow rate between the second electronic expansion valve 9 and the first electronic expansion valve 8 and the heat exchange temperature difference in the regenerator 10, and reduce the regenerative effect.

[0108] In some embodiments, the first parameter is the suction temperature of the compressor. Correspondingly, the set second threshold value is a temperature range. Judging the regenerative effect of the regenerator based on the first parameter and the set second threshold value includes:

[0109] If the current suction temperature of the compressor is greater than the upper limit value of the temperature range, it is determined that the regeneration of the regenerator is excessive;

[0110] If the current suction temperature of the compressor is less than the lower limit value of the temperature range, it is determined that the regeneration of the regenerator is insufficient;

[0111] If the current suction temperature of the compressor falls within the temperature range, it is determined that the regeneration of the regenerator is appropriate.

[0112] In some embodiments, the control method further includes:

[0113] Obtain a second parameter characterizing the operating state of the air conditioner;

[0114] Determine the current set second threshold value based on the current second parameter and the pre-set mapping relationship between the second parameter and the set second threshold value.

[0115] Here, the second parameter may include at least one of the following: the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, the indoor ambient temperature, and the outdoor ambient temperature.

[0116] Exemplarily, the pre-set mapping relationship between the second parameter and the set second threshold value can be reasonably determined based on test data and pre-stored in the air conditioner.

[0117] In some embodiments, in the heating mode, the method further includes:

[0118] Adjusting the opening degree of the first electronic expansion valve based on the current second parameter.

[0119] Exemplarily, adjusting the opening degree of the second electronic expansion valve based on the current second parameter includes:

[0120] Determining the target opening degree of the first electronic expansion valve based on the current second parameter and the pre-set mapping relationship between the second parameter and the opening degree of the first electronic expansion valve.

[0121] Adjusting the opening degree of the first electronic expansion valve to the target opening degree.

[0122] Exemplarily, the pre-set mapping relationship between the second parameter and the opening degree of the first electronic expansion valve can be reasonably determined based on test data and pre-stored in the air conditioner.

[0123] In this way, the opening degree of the first electronic expansion valve can be matched with the working conditions of the air conditioner, thereby ensuring a certain heating capacity and energy efficiency.

[0124] Next, a control method according to an embodiment of the present application will be further described in detail with an application example.

[0125] As Figure 6 shown, in this application example, the control method of the air conditioner includes:

[0126] Step 601, determining whether the working mode is the cooling mode. If so, step 602 is executed; if not, step 606 is executed.

[0127] Here, the cooling mode can be understood in a broad sense and can be the cooling process or the dehumidification process of the air conditioner.

[0128] Step 602, obtaining the operating parameters of the air conditioner.

[0129] Here, the air conditioner obtains operating parameters such as the suction temperature of the compressor, the operating frequency of the compressor, the speed of the indoor fan, the speed of the outdoor fan, the indoor ambient temperature, and the outdoor ambient temperature in the cooling mode.

[0130] Exemplarily, the air conditioner can determine the currently set first threshold based on the foregoing operating parameters.

[0131] Step 603, determining the heat recovery effect of the heat recovery device. If the heat recovery is insufficient, step 604 is executed; if the heat recovery is excessive, step 605 is executed.

[0132] Exemplarily, the air conditioner can compare the suction temperature of the compressor with a determined first threshold value to judge the heat recovery effect of the heat recovery device. If the current suction temperature of the compressor is greater than the upper limit value of the first threshold, it is determined that the heat recovery of the heat recovery device is excessive; if the current suction temperature of the compressor is less than the lower limit value of the first threshold, it is determined that the heat recovery of the heat recovery device is insufficient; if the current suction temperature of the compressor falls within the temperature range of the first threshold, it is determined that the heat recovery of the heat recovery device is appropriate.

[0133] Step 604, increase the opening degree of the first electronic expansion valve.

[0134] Step 605, decrease the opening degree of the first electronic expansion valve.

[0135] Step 606, determine whether the working mode is the heating mode. If so, execute step 606.

[0136] Step 607, obtain the operating parameters of the air conditioner.

[0137] Here, the air conditioner obtains operating parameters such as the suction temperature of the compressor, the operating frequency of the compressor, the rotational speed of the indoor fan, the rotational speed of the outdoor fan, the indoor ambient temperature, and the outdoor ambient temperature in the heating mode.

[0138] Exemplarily, the air conditioner can determine a currently set second threshold based on the foregoing operating parameters.

[0139] Step 608, judge the heat recovery effect of the heat recovery device. If the heat recovery is insufficient, execute step 609. If the heat recovery is excessive, execute step 610.

[0140] Exemplarily, the air conditioner can compare the suction temperature of the compressor with a determined second threshold value to judge the heat recovery effect of the heat recovery device. If the current suction temperature of the compressor is greater than the upper limit value of the second threshold, it is determined that the heat recovery of the heat recovery device is excessive; if the current suction temperature of the compressor is less than the lower limit value of the second threshold, it is determined that the heat recovery of the heat recovery device is insufficient; if the current suction temperature of the compressor falls within the temperature range of the second threshold, it is determined that the heat recovery of the heat recovery device is appropriate.

[0141] Step 609, increase the opening degree of the second electronic expansion valve.

[0142] Step 610, decrease the opening degree of the second electronic expansion valve.

[0143] To implement the method of the embodiments of the present application, the embodiments of the present application further provide an air conditioner. Figure 7 Only the exemplary structure of the air conditioner is shown rather than all structures, and the shown partial structure or all structures can be implemented as needed. Figure 7 Shown partial structure or all structures.

[0144] Such as Figure 7As shown, the air conditioner 700 provided by the embodiment of the present application includes: at least one processor 701, a memory 702, and a user interface 703. Each component in the air conditioner 700 is coupled together through a bus system 704. It can be understood that the bus system 704 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 704 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clear illustration, in Figure 7 all kinds of buses are labeled as the bus system 704.

[0145] Among them, the user interface 703 may include a display, a keyboard, a mouse, a trackball, a click wheel, a button, a push button, a touchpad, or a touch screen, etc.

[0146] The memory 702 in the embodiment of the present application is used to store various types of data to support the operation of the air conditioner. Examples of these data include: any computer program for operating on the air conditioner.

[0147] The control method of the air conditioner disclosed in the embodiment of the present application can be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the control method of the air conditioner can be completed by the integrated logic circuit in the hardware of the processor 701 or the instructions in software form. The above-mentioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 701 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiment of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. Combining the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as being executed and completed by the hardware decoding processor, or executed and completed by the combination of the hardware and software modules in the decoding processor. The software module may be located in a storage medium, and this storage medium is located in the memory 702. The processor 701 reads the information in the memory 702 and combines its hardware to complete the steps of the control method of the air conditioner provided by the embodiment of the present application.

[0148] In an exemplary embodiment, the air conditioner may be implemented by one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field programmable gate arrays (FPGAs), general purpose processors, controllers, microcontroller units (MCUs), microprocessors, or other electronic components for performing the foregoing method.

[0149] It can be understood that the memory 702 can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory), an electrically erasable programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), a ferromagnetic random access memory (FRAM, ferromagnetic random access memory), a flash memory (Flash Memory), a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM, Compact Disc Read-Only Memory); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM, Random Access Memory), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as a static random access memory (SRAM, Static Random Access Memory), a synchronous static random access memory (SSRAM, Synchronous Static Random Access Memory), a dynamic random access memory (DRAM, Dynamic Random Access Memory), a synchronous dynamic random access memory (SDRAM, Synchronous Dynamic Random Access Memory), a double data rate synchronous dynamic random access memory (DDR SDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), an enhanced synchronous dynamic random access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), a sync link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), a direct rambus random access memory (DRRAM, Direct Rambus Random Access Memory).The memories described in the embodiments of the present application are intended to include, but not limited to, these and any other suitable types of memories.

[0150] In an exemplary embodiment, the embodiments of the present application also provide a storage medium, namely a computer storage medium, specifically a computer-readable storage medium. For example, it includes a memory 702 storing a computer program, and the above computer program can be executed by a processor 701 of an air conditioner to complete the steps of the method in the embodiments of the present application. The computer-readable storage medium can be a memory such as ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, or CD-ROM.

[0151] It should be noted that: "first", "second", etc. are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0152] In addition, the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0153] As mentioned above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, and a four-way valve connected by a refrigerant pipeline for switching between a cooling mode and a heating mode. The air conditioner further includes: a first electronic expansion valve and a second electronic expansion valve, which are arranged on the refrigerant pipeline and located between the outdoor heat exchanger and the indoor heat exchanger; a heat recovery device, which is located between the first electronic expansion valve and the second electronic expansion valve, and between the four-way valve and the suction port of the compressor, for performing heat exchange on the refrigerant in the refrigerant pipeline between the first electronic expansion valve and the second electronic expansion valve and the refrigerant in the refrigerant pipeline between the four-way valve and the suction port of the compressor; The method includes: Determine that the air conditioner is operating in the cooling mode, and adjust the opening degree of the first electronic expansion valve based on the heat recovery effect of the heat recovery device; or, Determine that the air conditioner is operating in the heating mode, and adjust the opening degree of the second electronic expansion valve based on the heat recovery effect of the heat recovery device; In the heating mode, the adjusting the opening degree of the second electronic expansion valve based on the heat recovery effect of the heat recovery device includes: Obtain a first parameter characterizing the heat recovery effect of the heat recovery device; Judge the heat recovery effect of the heat recovery device based on the first parameter and a set second threshold; If it is determined that the heat recovery of the heat recovery device is insufficient, control the second electronic expansion valve to increase the opening degree; If it is determined that the heat recovery of the heat recovery device is excessive, control the second electronic expansion valve to reduce the opening degree; The method further includes: Obtain a second parameter characterizing the operating state of the air conditioner; Determine the current set second threshold based on the current second parameter and the mapping relationship between the preset second parameter and the set second threshold; In the heating mode, the method further includes: Adjust the opening degree of the first electronic expansion valve based on the current second parameter.

2. The method according to claim 1, characterized in that, In the cooling mode, the adjusting the opening degree of the first electronic expansion valve based on the heat recovery effect of the heat recovery device includes: Obtain a first parameter characterizing the heat recovery effect of the heat recovery device; Judge the heat recovery effect of the heat recovery device based on the first parameter and a set first threshold; If it is determined that the heat recovery of the heat recovery device is insufficient, control the first electronic expansion valve to increase the opening degree; If it is determined that the heat recovery of the heat recovery device is excessive, control the first electronic expansion valve to reduce the opening degree.

3. The method according to claim 2, wherein The first parameter is the suction temperature of the compressor. Correspondingly, the set first threshold is a temperature range; the judging the heat recovery effect of the heat recovery device based on the first parameter and the set first threshold includes: If the current suction temperature of the compressor is greater than the upper limit value of the temperature range, it is determined that the heat recovery of the heat recovery device is excessive; If the current suction temperature of the compressor is less than the lower limit value of the temperature range, it is determined that the heat recovery of the heat recovery device is insufficient; If the current suction temperature of the compressor falls within the temperature range, it is determined that the heat recovery of the heat recovery device is appropriate.

4. The method according to claim 2, wherein The method further includes: Obtain a second parameter characterizing the operating state of the air conditioner; Determine the current set first threshold based on the current second parameter and the pre-set mapping relationship between the second parameter and the set first threshold.

5. The method according to claim 4, characterized in that In the refrigeration mode, the method further includes: Adjust the opening degree of the second electronic expansion valve based on the current second parameter.

6. The method according to claim 5, wherein The adjusting the opening degree of the second electronic expansion valve based on the current second parameter includes: Determine the target opening degree of the second electronic expansion valve based on the current second parameter and the pre-set mapping relationship between the second parameter and the opening degree of the second electronic expansion valve; Adjust the opening degree of the second electronic expansion valve to the target opening degree.

7. The method according to claim 1, characterized in that The first parameter is the suction temperature of the compressor. Correspondingly, the set second threshold is a temperature range. The determining the regenerative effect of the regenerative device based on the first parameter and the set second threshold includes: If the current suction temperature of the compressor is greater than the upper limit value of the temperature range, it is determined that the regenerative device has excessive regeneration; If the current suction temperature of the compressor is less than the lower limit value of the temperature range, it is determined that the regenerative device has insufficient regeneration; If the current suction temperature of the compressor falls within the temperature range, it is determined that the regenerative device has appropriate regeneration.

8. The method according to claim 1, characterized in that The adjusting the opening degree of the second electronic expansion valve based on the current second parameter includes: Determine the target opening degree of the first electronic expansion valve based on the current second parameter and the pre-set mapping relationship between the second parameter and the opening degree of the first electronic expansion valve; Adjust the opening degree of the first electronic expansion valve to the target opening degree.

9. An air conditioner, characterized in that, The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor connected by a refrigerant pipeline, and a four-way valve for realizing the switching between the refrigeration mode and the heating mode. The air conditioner further includes: a first electronic expansion valve and a second electronic expansion valve, which are arranged on the refrigerant pipeline and between the outdoor heat exchanger and the indoor heat exchanger; a regenerative device, which is between the first electronic expansion valve and the second electronic expansion valve, and between the four-way valve and the suction port of the compressor, and is used for heat exchange of the refrigerant on the refrigerant pipeline between the first electronic expansion valve and the second electronic expansion valve and the refrigerant on the refrigerant pipeline between the four-way valve and the suction port of the compressor; the air conditioner further includes: a processor and a memory for storing a computer program that can run on the processor, wherein, The processor is used to execute the steps of the method according to any one of claims 1 to 8 when running the computer program.

10. A storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 8 are realized.

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