Air conditioner and control method, device and equipment thereof, medium and program product

Abstract

The invention discloses an air conditioner and a control method, device and equipment thereof, a medium and a program product, and relates to the technical field of heat exchange. According to the air conditioner, the two outdoor heat exchangers are arranged in the air conditioner, gas-liquid two-phase separation is conducted on the refrigerant subjected to heat exchange circulation through the gas-liquid separator, and therefore when the first defrosting mode is operated, the gas refrigerant discharged from the gas-liquid separator is heated through the electric heating sleeve to form the high-temperature gas refrigerant, and then the high-temperature gas refrigerant is heated through the electric heating sleeve to form the high-temperature gas refrigerant. And the air flows into one of the first outdoor heat exchanger and the second outdoor heat exchanger and returns to the gas-liquid separator to form a first defrosting loop. And the liquid refrigerant discharged from the gas-liquid separator passes through another outdoor heat exchanger outside the first defrosting loop and then flows into the compressor to form a heating loop. In the defrosting process of the outdoor heat exchanger, heating of the air conditioner to the indoor environment is kept, and the somatosensory comfort of a user and the defrosting efficiency of the outdoor heat exchanger are improved.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and in particular to an air conditioner and its control method, device, equipment, medium and program products. Background Technology

[0002] When an air conditioner is in low-temperature heating mode, the surface temperature of the outdoor heat exchanger will be lower than the ambient temperature, resulting in frost formation and reduced heat exchange performance. When the surface temperature of the outdoor heat exchanger is detected to be below a certain value, the air conditioner typically needs to operate in defrost mode to raise the surface temperature of the outdoor heat exchanger.

[0003] However, the current defrosting mode is usually switched from heating mode to cooling mode. At this time, the outdoor heat exchanger will also absorb heat from the indoor heat exchanger, causing large fluctuations in the indoor ambient temperature and reducing the user's comfort. Summary of the Invention

[0004] This invention addresses the problem that when the outdoor heat exchanger absorbs heat from the indoor heat exchanger during defrost mode, causing significant fluctuations in indoor ambient temperature and reducing user comfort. The invention aims to provide an air conditioner and its control method, apparatus, equipment, medium, and program products that overcome or at least partially solve the aforementioned problems.

[0005] Based on a first aspect of the present invention, a method for controlling an air conditioner is provided, the air conditioner comprising: compressor; An indoor heat exchanger, which is connected to the compressor via a connecting pipe; An electronic expansion valve, wherein the electronic expansion valve is connected to the indoor heat exchanger via the connecting pipe; A gas-liquid separator, wherein the gas-liquid separator is connected to the electronic expansion valve and the compressor respectively through the connecting pipeline; The first outdoor heat exchanger is connected to the compressor and the gas-liquid separator respectively through the connecting pipeline; The second outdoor heat exchanger is connected to the compressor and the gas-liquid separator respectively through the connecting pipeline; An electric heating sleeve is fitted onto the connecting pipe to heat the refrigerant flowing through the connecting pipe; A valve assembly, comprising multiple valves distributed in the connecting pipeline, for controlling the opening and closing state of the connecting pipeline; When the air conditioner is running in the first defrosting mode, the refrigerant discharged from the compressor outlet flows sequentially through the indoor heat exchanger, the electronic expansion valve, and the gas-liquid separator. The gaseous refrigerant discharged from the gas-liquid separator is heated by the electric heating sleeve to form a high-temperature gaseous refrigerant, which then flows into one of the first outdoor heat exchanger and the second outdoor heat exchanger, and returns to the gas-liquid separator to form the first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator passes through another outdoor heat exchanger outside the first defrosting circuit before flowing into the compressor to form a heating circuit.

[0006] In one optional embodiment, the valve assembly includes: The first control valve is connected to the exhaust port of the compressor, the indoor heat exchanger, the first end of the first outdoor heat exchanger, the air inlet of the compressor, and the gas-liquid separator, respectively. The second control valve is connected to the first control valve and the first end of the first outdoor heat exchanger, respectively. The third control valve is connected to the first end of the second outdoor heat exchanger, the second control valve, and the gas-liquid separator, respectively. The fourth control valve is connected to the connecting pipeline located between the air inlet of the compressor and the gas-liquid separator, the gas-liquid separator, the second end of the first outdoor heat exchanger, and the second end of the second outdoor heat exchanger, respectively. The fifth control valve is connected to the air inlet of the compressor and the gas-liquid separator, respectively. The sixth control valve is connected to the fourth control valve, the fifth control valve and the gas-liquid separator respectively, wherein the electric heating sleeve is sleeved on the connecting pipeline located between the fourth control valve and the sixth control valve; The seventh control valve is connected to the connecting pipeline located between the electronic expansion valve and the gas-liquid separator, and the third control valve, respectively.

[0007] In one optional embodiment, the valve assembly further includes: The eighth control valve is embedded in the connecting pipeline between the sixth control valve and the gas-liquid separator; A ninth control valve, which is embedded in the connecting pipe between the first control valve and the air inlet of the compressor; wherein, When the air conditioner operates in the second defrost mode, the first control valve, the second control valve, the third control valve, and the fourth control valve are activated respectively, the fifth control valve, the sixth control valve, and the seventh control valve are opened respectively, and the eighth control valve and the ninth control valve are closed respectively, so that the refrigerant flowing out of the compressor's exhaust port flows sequentially through the first outdoor heat exchanger, the gas-liquid separator, and the second outdoor heat exchanger before flowing into the compressor to form the second defrost circuit; or... When the air conditioner operates in the second defrost mode, the first control valve, the second control valve, the third control valve, and the fourth control valve are activated respectively, the fifth control valve, the sixth control valve, and the seventh control valve are turned on respectively, and the eighth control valve and the ninth control valve are turned off respectively, so that the refrigerant flowing out of the compressor's exhaust port flows sequentially through the second outdoor heat exchanger, the gas-liquid separator, and the first outdoor heat exchanger before flowing into the compressor to form the second defrost circuit.

[0008] Based on a second aspect of the present invention, a control method for an air conditioner is also provided, the control method being applied to an air conditioner as described in any of the foregoing inventions, the control method comprising: Acquire surface temperature data of outdoor heat exchanger components, wherein the surface temperature data includes: a first surface temperature value of a first outdoor heat exchanger and a second surface temperature value of a second outdoor heat exchanger. If the surface temperature data meets the first defrosting condition, the valve assembly is controlled to operate and the electric heating sleeve is started to run the first defrosting mode. The first defrosting mode includes: the refrigerant discharged from the compressor outlet flows sequentially through the indoor heat exchanger, the electronic expansion valve, and the gas-liquid separator. The gaseous refrigerant discharged from the gas-liquid separator is heated by the electric heating sleeve to form a high-temperature gaseous refrigerant, which then flows into one of the first outdoor heat exchanger and the second outdoor heat exchanger and returns to the gas-liquid separator to form the first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator passes through another outdoor heat exchanger outside the first defrosting circuit and then flows into the compressor to form a heating circuit.

[0009] An optional aspect of the invention is that the first defrosting condition includes: at least one of a first surface temperature value and a second surface temperature value is less than or equal to a first temperature threshold and greater than or equal to a second temperature threshold.

[0010] In one optional aspect of the invention, when the first surface temperature value is between the first temperature threshold and the second temperature threshold, and the second surface temperature value is greater than the first temperature threshold, controlling the valve assembly to operate and activating the electric heating sleeve to run a first defrosting mode includes: The valve assembly is controlled to operate, and the electric heating sleeve is activated, so that the refrigerant discharged from the compressor outlet flows sequentially through the indoor heat exchanger, the electronic expansion valve, and the gas-liquid separator. The gaseous refrigerant discharged from the gas-liquid separator is heated by the electric heating sleeve to form a high-temperature gaseous refrigerant, which then flows into the first outdoor heat exchanger and then flows back to the gas-liquid separator to form a first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator passes through the second outdoor heat exchanger and then flows into the compressor to form a heating circuit.

[0011] In one optional embodiment, when the second surface temperature value is between the first temperature threshold and the second temperature threshold, and the first surface temperature value is greater than the first temperature threshold, controlling the valve assembly to operate and activating the electric heating sleeve to run a first defrosting mode includes: The valve assembly is controlled to operate, and the electric heating sleeve is activated, so that the refrigerant discharged from the compressor outlet flows sequentially through the indoor heat exchanger, the electronic expansion valve, and the gas-liquid separator. The gaseous refrigerant discharged from the gas-liquid separator is heated by the electric heating sleeve to form a high-temperature gaseous refrigerant, which then flows into the second outdoor heat exchanger and then flows back to the gas-liquid separator to form a first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator flows into the compressor after passing through the first outdoor heat exchanger to form a heating circuit.

[0012] In one optional embodiment, the control method further includes: If the surface temperature data meets the second defrosting conditions, the valve assembly is controlled to operate and the electric heating sleeve is stopped, causing the air conditioner to run in the second defrosting mode. Running the second defrosting mode includes: refrigerant flowing from the compressor's exhaust port sequentially flows through the first outdoor heat exchanger, the gas-liquid separator, and the second outdoor heat exchanger before flowing into the compressor to form a second defrosting circuit; or... Operating the second defrosting mode includes: refrigerant flowing out of the compressor's exhaust port flows sequentially through the second outdoor heat exchanger, the gas-liquid separator, and the first outdoor heat exchanger before flowing into the compressor to form a second defrosting circuit.

[0013] In one optional embodiment, the control method further includes: If the surface temperature data meets the third defrosting conditions, the valve assembly is controlled to operate and the electric heating sleeve is stopped, causing the air conditioner to run in the third defrosting mode. The third defrosting mode includes alternating operation of the first and second defrosting modes. Running the second defrosting mode includes: refrigerant flowing from the compressor's exhaust port sequentially flowing through the first outdoor heat exchanger, the gas-liquid separator, and the second outdoor heat exchanger before flowing into the compressor to form a second defrosting circuit; or... Operating the second defrosting mode includes: refrigerant flowing out of the compressor's exhaust port flows sequentially through the second outdoor heat exchanger, the gas-liquid separator, and the first outdoor heat exchanger before flowing into the compressor to form a second defrosting circuit.

[0014] Based on a third aspect of the present invention, a control device for an air conditioner is also provided, the control device being applied in an air conditioner as described in any of the foregoing embodiments, the control device comprising: The data acquisition module is used to acquire surface temperature data of the outdoor heat exchanger assembly, wherein the surface temperature data includes: a first surface temperature value of the first outdoor heat exchanger and a second surface temperature value of the second outdoor heat exchanger. The mode switching module is used to control the valve assembly and start the electric heating sleeve to operate the first defrost mode when the surface temperature data meets the first defrost condition. The operation of the first defrost mode includes: the refrigerant discharged from the compressor outlet flows sequentially through the indoor heat exchanger, the electronic expansion valve, and the gas-liquid separator; the gaseous refrigerant discharged from the gas-liquid separator is heated by the electric heating sleeve to form a high-temperature gaseous refrigerant, and then flows into one of the first outdoor heat exchanger and the second outdoor heat exchanger, and returns to the gas-liquid separator to form the first defrost circuit; the liquid refrigerant discharged from the gas-liquid separator passes through another outdoor heat exchanger outside the first defrost circuit and then flows into the compressor to form a heating circuit.

[0015] Based on a fourth aspect of the present invention, an electronic device is also provided, comprising: One or more processors; Memory; One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs being configured to perform any of the methods described in the foregoing invention.

[0016] Based on a fifth aspect of the present invention, a computer-readable storage medium is also provided for storing a computer program for use in conjunction with an electronic device, the computer program being executable by a processor to perform any of the methods described in the above-described invention.

[0017] Based on a sixth aspect of the present invention, a computer program product is also provided, comprising a computer program / computer executable instructions, wherein the computer program / computer executable instructions, when executed by a processor in an electronic device, implement the method described in any one of the above-described inventions.

[0018] Compared to existing technologies, this invention incorporates two outdoor heat exchangers in the air conditioner and uses a gas-liquid separator to separate the gas and liquid phases of the refrigerant during the heat exchange cycle. This allows the gaseous refrigerant discharged from the gas-liquid separator to be heated by the electric heating sleeve to form a high-temperature gaseous refrigerant during the first defrost mode. This gaseous refrigerant then flows into one of the first or second outdoor heat exchangers and returns to the gas-liquid separator, forming the first defrost circuit. Conversely, the liquid refrigerant discharged from the gas-liquid separator passes through another outdoor heat exchanger outside the first defrost circuit before flowing into the compressor to form the heating circuit. Therefore, during the defrosting process of the outdoor heat exchangers, the air conditioner maintains its heating function for the indoor environment, improving user comfort. Furthermore, it improves the defrosting efficiency of the outdoor heat exchangers without absorbing heat from the indoor heat exchangers.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0021] In the attached diagram: Figure 1 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application; Figure 2 This is a schematic diagram of the refrigerant circulation path when an air conditioner is operating in cooling mode, as provided in an embodiment of this application. Figure 3 This is a schematic diagram of the refrigerant circulation path of an air conditioner in heating mode, provided in an embodiment of this application. Figure 4 This is a schematic diagram of the refrigerant circulation path of an air conditioner operating in a first defrosting mode, provided in an embodiment of this application. Figure 5This is a schematic diagram of the refrigerant circulation path when an air conditioner is operating in another first defrosting mode, as provided in an embodiment of this application. Figure 6 This is a schematic diagram of the refrigerant circulation path when an air conditioner is operating in a second defrosting mode, as provided in an embodiment of this application. Figure 7 This is a schematic diagram of the refrigerant circulation path when an air conditioner is operating in another second defrosting mode, as provided in an embodiment of this application. Figure 8 This is a flowchart illustrating the steps of a control method for an air conditioner provided in an embodiment of this application; Figure 9 This is a flowchart illustrating the steps of another air conditioner control method provided in this application embodiment; Figure 10 This is a structural block diagram of a control device for an air conditioner provided in an embodiment of this application.

[0022] Figure descriptions: 100, Compressor; 200, Indoor heat exchanger; 300, Electronic expansion valve; 400, Gas-liquid separator; 500, First outdoor heat exchanger; 600, Second outdoor heat exchanger; 700, Electric heating sleeve; 800, Valve assembly; 810, First control valve; 820, Second control valve; 830, Third control valve; 840, Fourth control valve; 850, Fifth control valve; 860, Sixth control valve; 870, Seventh control valve; 880, Eighth control valve; 890, Ninth control valve. Detailed Implementation

[0023] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0024] When an air conditioner is in low-temperature heating mode, the surface temperature of the outdoor heat exchanger will be lower than the ambient temperature, resulting in frost formation and reduced heat exchange performance. When the surface temperature of the outdoor heat exchanger is detected to be below a certain value, the air conditioner typically needs to operate in defrost mode to raise the surface temperature of the outdoor heat exchanger.

[0025] However, the current defrosting mode is usually switched from heating mode to cooling mode. At this time, the outdoor heat exchanger will also absorb heat from the indoor heat exchanger, causing large fluctuations in the indoor ambient temperature and reducing the user's comfort.

[0026] Based on the aforementioned technical problems, this application proposes an embodiment. This embodiment involves installing two outdoor heat exchangers in the air conditioner and using a gas-liquid separator to separate the gas and liquid phases of the refrigerant circulating in the heat exchange cycle. During the first defrost mode, the gaseous refrigerant discharged from the gas-liquid separator is heated by the electric heating sleeve to form a high-temperature gaseous refrigerant, which then flows into one of the first or second outdoor heat exchangers and returns to the gas-liquid separator to form the first defrost circuit. The liquid refrigerant discharged from the gas-liquid separator passes through another outdoor heat exchanger outside the first defrost circuit and then flows into the compressor to form the heating circuit. Therefore, during the defrosting process of the outdoor heat exchanger, the air conditioner maintains its heating function for the indoor environment, improving user comfort. Furthermore, it improves the defrosting efficiency of the outdoor heat exchanger without absorbing heat from the indoor heat exchanger.

[0027] Reference Figure 1 This illustration shows an air conditioner according to an embodiment of this application. The air conditioner may include a compressor 100, an indoor heat exchanger 200, an electronic expansion valve 300, a gas-liquid separator 400, a first outdoor heat exchanger 500, a second outdoor heat exchanger 600, an electric heating sleeve 700, and a valve assembly 800. The indoor heat exchanger 200 is connected to the compressor 100 via a connecting pipe, and the electronic expansion valve 300 is connected to the indoor heat exchanger 200 via the connecting pipe. The connecting pipe may be composed of multiple connecting pipes. The gas-liquid separator 400 is connected to the electronic expansion valve 300 and the compressor 100 via the connecting pipe. The first outdoor heat exchanger 500 is connected to the compressor 100 and the gas-liquid separator 400 via the connecting pipe. The second outdoor heat exchanger 600 is connected to the compressor 100 and the gas-liquid separator 400 via the connecting pipe. The electric heating sleeve 700 is fitted onto the connecting pipe to heat the refrigerant flowing through the connecting pipe. The valve assembly 800 includes multiple valves distributed in the connecting pipe to control the opening and closing state of the connecting pipe.

[0028] In this embodiment, the compressor 100 compresses the incoming refrigerant (also known as a cooling agent) and discharges high-temperature, high-pressure gaseous refrigerant from the exhaust port of the compressor 100. (Refer to...) Figure 3As shown, when the air conditioner is operating in heating mode, the high-temperature, high-pressure gaseous refrigerant flows to the indoor heat exchanger 200 under the regulation of the valve assembly 800 to dissipate heat. This heat dissipation from the indoor heat exchanger 200 raises the indoor ambient temperature and lowers the refrigerant temperature within the indoor heat exchanger 200. The refrigerant flowing out of the indoor heat exchanger 200 is a high-temperature, high-pressure liquid refrigerant. It then flows through the electronic expansion valve 300 for throttling and pressure reduction, resulting in a low-temperature, low-pressure liquid refrigerant. Low-temperature, low-pressure liquid refrigerant flows through the gas-liquid separator 400 for two-phase separation. The low-temperature, low-pressure liquid refrigerant discharged from the gas-liquid separator 400, under the regulation of the valve assembly 800, flows to the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600 respectively for evaporation and heat absorption, resulting in low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant flowing out of the first outdoor heat exchanger 500, the low-temperature, low-pressure gaseous refrigerant flowing out of the second outdoor heat exchanger 600, and the low-temperature, low-pressure gaseous refrigerant discharged from the gas-liquid separator 400, under the regulation of the valve assembly 800, are combined and enter the compressor 100 through the air inlet for further compression, forming a heating cycle loop in the heating mode.

[0029] Reference Figure 2 As shown, when the air conditioner is operating in cooling mode, the high-temperature and high-pressure gaseous refrigerant flows to the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600 respectively under the regulation of the valve assembly 800, and condenses and dissipates heat in the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600 respectively. The refrigerant flowing out of the first outdoor heat exchanger 500 and the refrigerant flowing out of the second outdoor heat exchanger 600 are both high-temperature and high-pressure liquid refrigerants. Under the regulation of the valve assembly 800, the refrigerant flowing out from the first outdoor heat exchanger 500 and the refrigerant flowing out from the second outdoor heat exchanger 600 merge and flow into the gas-liquid separator 400. From the gas-liquid separator 400, it flows to the electronic expansion valve 300 for throttling and pressure reduction, resulting in low-temperature, low-pressure liquid refrigerant that flows to the indoor heat exchanger 200. In the indoor heat exchanger 200, it evaporates and absorbs heat to obtain low-temperature, low-pressure refrigerant, which lowers the temperature in the indoor environment. The low-temperature, low-pressure refrigerant enters the compressor 100 from the air inlet and is compressed again, forming a refrigeration cycle loop in the refrigeration mode.

[0030] Reference Figure 4 and Figure 5As shown, when the air conditioner is operating in the first defrost mode, the refrigerant discharged from the compressor 100 flows sequentially through the indoor heat exchanger 200, the electronic expansion valve 300, and the gas-liquid separator 400. The gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, which then flows into one of the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600, and returns to the gas-liquid separator 400 to form the first defrost circuit. The liquid refrigerant discharged from the gas-liquid separator 400 passes through another outdoor heat exchanger outside the first defrost circuit and then flows back into the compressor 100 to form a heating circuit.

[0031] In other words, under the regulation of the valve assembly 800, the gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, which then flows into the first outdoor heat exchanger 500 or the second outdoor heat exchanger 600. This allows for condensation and heat dissipation, increasing the surface temperature of the first outdoor heat exchanger 500 or the second outdoor heat exchanger 600, thus achieving defrosting. The low-temperature liquid refrigerant (or low-temperature gas-liquid mixture refrigerant) discharged from the first outdoor heat exchanger 500 or the second outdoor heat exchanger 600 then flows into the gas separator for two-phase separation. The gaseous refrigerant continues to flow through the electric heating tube for further heating, forming a high-temperature gaseous refrigerant, thereby forming the first defrosting circuit under the first defrosting mode.

[0032] Under the regulation of the valve assembly 800, the liquid refrigerant discharged from the gas-liquid separator 400 passes through the outdoor heat exchanger (excluding the outdoor heat exchanger located in the first defrost circuit) and evaporates to absorb heat, resulting in a low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant flowing out of the outdoor heat exchanger enters the compressor 100 through the air inlet and is compressed again, forming a heating cycle circuit in the first defrost mode.

[0033] In summary, during the defrosting process of one of the outdoor heat exchangers, the air conditioner can maintain heating of the indoor environment, improving user comfort. This improves the defrosting efficiency of the outdoor heat exchanger without absorbing heat from the indoor heat exchanger. Furthermore, in the heating cycle of the first defrosting mode, the refrigerant entering the outdoor heat exchanger is all liquid-phase refrigerant, which avoids uneven flow caused by random movement of air bubbles within the outdoor heat exchanger, thereby improving the uniformity of flow distribution in the outdoor heat exchanger.

[0034] In one or more embodiments, refer to Figures 1-7As shown, the valve assembly 800 may include a first control valve 810, a second control valve 820, a third control valve 830, a fourth control valve 840, a fifth control valve 850, a sixth control valve 860, and a seventh control valve 870. The first control valve 810 is connected to the exhaust port of the compressor 100, the indoor heat exchanger 200, the first end of the first outdoor heat exchanger 500, the air inlet of the compressor 100, and the gas-liquid separator 400, respectively. In other words, the first control valve 810 may be a four-way reversing valve, thereby allowing the flow direction of the high-temperature, high-pressure gaseous refrigerant flowing from the compressor 100 to be switched.

[0035] The second control valve 820 is connected to the first control valve 810 and the first end of the first outdoor heat exchanger 500, respectively. For example, the second control valve 820 is located between the first control valve 810 and the first end of the first outdoor heat exchanger 500. The second control valve 820 can be a multi-way valve. The third control valve 830 is connected to the first end of the second outdoor heat exchanger 600, the second control valve 820, and the gas-liquid separator 400, respectively. The third control valve 830 can be a multi-way valve or a four-way reversing valve. Through the combination of the second control valve 820 and the third control valve 830, the pipelines between the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600 can be connected in parallel or in series to switch the refrigerant flow path.

[0036] The fourth control valve 840 is connected to the connecting pipeline between the air inlet of the compressor 100 and the gas-liquid separator 400, the gas-liquid separator 400, the second end of the first outdoor heat exchanger 500, and the second end of the second outdoor heat exchanger 600. The fourth control valve 840 may be a multi-way valve. It is connected to the connecting pipeline between the air inlet of the compressor 100 and the air outlet of the gas-liquid separator 400, and other interfaces on the fourth control valve 840 are connected to the liquid outlet of the gas-liquid separator 400. Therefore, by adjusting the fourth control valve 840, the refrigerant flow path between the gas-liquid separator 400, the first outdoor heat exchanger 500, and the second outdoor heat exchanger 600 can be switched.

[0037] The fifth control valve 850 is connected to the air inlet of the compressor 100 and the gas-liquid separator 400, respectively. The sixth control valve 860 is connected to the fourth control valve 840, the fifth control valve 850, and the gas-liquid separator 400, respectively. The electric heating sleeve 700 is fitted onto the connecting pipe between the fourth control valve 840 and the sixth control valve 860. The seventh control valve 870 is connected to the connecting pipe between the electronic expansion valve 300 and the gas-liquid separator 400, and the third control valve 830, respectively. The fifth control valve 850, the sixth control valve 860, and the seventh control valve 870 can be one-way valves, used to open or close the refrigerant flow path in the corresponding connecting pipe. Therefore, by controlling the different operating states of the first control valve 810 to the seventh control valve 870, different operating modes of the air conditioner can be controlled.

[0038] Reference Figure 3 As shown, when the air conditioner is operating in heating mode, the fifth control valve 850 is open, while the sixth control valve 860 and the seventh control valve 870 are both closed. The first control valve 810 activates, connecting the exhaust port of the compressor 100 to the indoor heat exchanger 200, allowing the refrigerant flowing from the indoor heat exchanger 200 to flow into the electronic expansion valve 300. Since the seventh control valve 870 and the electronic expansion valve 300 are connected to the inlet of the gas-liquid separator 400, when the seventh control valve 870 is closed, the refrigerant flowing from the electronic expansion valve 300 flows into the gas-liquid separator 400. Because the sixth control valve 860 is closed, the gaseous refrigerant discharged from the exhaust port of the gas-liquid separator 400 enters the compressor 100 through the fifth control valve 850. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the liquid refrigerant discharged from the drain port of the gas-liquid separator 400 flows through the fourth control valve 840 into the second ends of the first indoor heat exchanger 200 and the second indoor heat exchanger 200, respectively. The refrigerant flowing out from the first end of the first indoor heat exchanger 200 flows through the second control valve 820 to the first control valve 810. The refrigerant flowing out from the first end of the second indoor heat exchanger 200 flows through the third control valve 830 to the second control valve 820, and then flows to the first control valve 810. The refrigerant flowing out from the first control valve 810 flows to the compressor 100 for compression, thereby forming a heating cycle loop in the heating mode.

[0039] Reference Figure 2As shown, when the air conditioner is operating in cooling mode, the fifth control valve 850, the sixth control valve 860, and the seventh control valve 870 are all closed. The first control valve 810 activates, connecting the exhaust port of the compressor 100 to the second control valve 820. Refrigerant discharged from the compressor 100 flows to the second control valve 820. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, a portion of the refrigerant flowing from the second control valve 820 flows into the first end of the first outdoor heat exchanger 500, and another portion of the refrigerant flowing from the second control valve 820 flows into the first end of the second outdoor heat exchanger 600 through the third control valve 830. The refrigerant flowing from the second end of the first indoor heat exchanger 200 and the refrigerant flowing from the second end of the second indoor heat exchanger 200 converge in the fourth control valve 840 and flow into the gas-liquid separator 400 from the liquid outlet. The refrigerant then flows sequentially through the electronic expansion valve 300, the indoor heat exchanger 200, and the first control valve 810. Finally, the refrigerant flowing from the first control valve 810 flows into the compressor 100 for compression, thereby forming a refrigeration cycle loop in the refrigeration mode.

[0040] Reference Figure 4 As shown, in one example, when the controller operates in the first defrosting mode, the fifth control valve 850 is closed, while the sixth control valve 860 and the seventh control valve 870 are open. The first control valve 810 activates, connecting the exhaust port of the compressor 100 to the indoor heat exchanger 200. The refrigerant flowing from the indoor heat exchanger 200 then flows to the electronic expansion valve 300. All the refrigerant flowing from the electronic expansion valve 300 flows into the gas-liquid separator 400. Because the fifth control valve 850 is closed and the sixth control valve 860 is open, the gaseous refrigerant discharged from the gas-liquid separator 400 flows through the electric heating sleeve 700, obtaining high-temperature gaseous refrigerant which then flows to the fourth control valve 840. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the high-temperature gaseous refrigerant flowing out of the fourth control valve 840 flows to the second end of the second outdoor heat exchanger 600, where it condenses and releases heat, thus defrosting the second outdoor heat exchanger 600. The refrigerant flowing out of the first end of the second outdoor heat exchanger 600 passes through the third control valve 830 and the seventh control valve 870, returning to the gas-liquid separator 400 from the inlet, thereby forming the first defrosting circuit in the first defrosting mode.

[0041] The liquid refrigerant discharged from the gas-liquid separator 400 flows through the fourth control valve 840, enters the first outdoor heat exchanger 500 from the second end for evaporation and heat absorption, and the refrigerant flowing out from the first end of the first outdoor heat exchanger 500 flows sequentially through the second control valve 820 and the first control valve 810, and returns to the compressor 100 for compression, thereby forming a heating cycle loop in the first defrosting mode. At this time, the first outdoor heat exchanger 500 heats, and the second outdoor heat exchanger 600 defrosts.

[0042] Reference Figure 5 As shown, in another example, when the controller operates in the first defrosting mode, the fifth control valve 850 is closed, while the sixth control valve 860 and the seventh control valve 870 are open. The first control valve 810 activates, connecting the exhaust port of the compressor 100 to the indoor heat exchanger 200. The refrigerant flowing from the indoor heat exchanger 200 then flows to the electronic expansion valve 300. All the refrigerant flowing from the electronic expansion valve 300 flows into the gas-liquid separator 400. Because the fifth control valve 850 is closed and the sixth control valve 860 is open, the gaseous refrigerant discharged from the gas-liquid separator 400 flows through the electric heating sleeve 700, obtaining high-temperature gaseous refrigerant which then flows to the fourth control valve 840. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the high-temperature gaseous refrigerant flowing out from the fourth control valve 840 flows to the second end of the first outdoor heat exchanger 500, where it condenses and releases heat, thus defrosting the first outdoor heat exchanger 500. The refrigerant flowing out from the first end of the first outdoor heat exchanger 500 sequentially passes through the second control valve 820, the third control valve 830, and the seventh control valve 870, returning to the gas-liquid separator 400 from the inlet, thereby forming the first defrosting circuit in the first defrosting mode.

[0043] The liquid refrigerant discharged from the gas-liquid separator 400 flows through the fourth control valve 840, enters the second outdoor heat exchanger 600 from the second end of the first outdoor heat exchanger 500 for evaporation and heat absorption, and the refrigerant flowing out from the first end of the second outdoor heat exchanger 600 flows sequentially through the third control valve 830, the second control valve 820, and the first control valve 810, and returns to the compressor 100 for compression, thereby forming a heating cycle loop in the first defrosting mode. At this time, the first outdoor heat exchanger 500 defrosts, and the second outdoor heat exchanger 600 heats.

[0044] In one or more embodiments, to further improve the defrosting efficiency of the air conditioner, the air conditioner can be pre-set with different defrosting modes according to the outdoor temperature. For example, in addition to the first defrosting mode, the air conditioner's operating mode may also include a second defrosting mode, the defrosting efficiency of which is higher than that of the first defrosting mode. (Refer to 6 and...) Figure 7 As shown, the valve assembly 800 may further include an eighth control valve 880 and a ninth control valve 890. The eighth control valve 880 is embedded in the connecting pipe between the sixth control valve 860 and the gas-liquid separator 400. In other words, the eighth control valve 880 can be located at the exhaust port of the gas-liquid separator 400 to control whether the gaseous refrigerant in the gas-liquid separator 400 is discharged. The ninth control valve 890 is embedded in the connecting pipe between the first control valve 810 and the air inlet of the compressor 100. Thus, the ninth control valve 890 can control the opening and closing of the pipe between the first control valve 810 and the air inlet of the compressor 100. For example, when the ninth control valve 890 is closed, only the refrigerant flowing into the air inlet of the compressor 100 can originate from the fifth control valve 850.

[0045] When the air conditioner is operating in heating mode, cooling mode, or the first defrost mode, the ninth control valve 890 is activated. When the air conditioner is operating in heating mode or the first defrost mode, the eighth control valve 880 is activated.

[0046] In one example, referencing Figure 6As shown, when the air conditioner operates in the second defrost mode, the fifth control valve 850, the sixth control valve 860, and the seventh control valve 870 are respectively open, while the eighth control valve 880 and the ninth control valve 890 are respectively closed. The first control valve 810 activates, connecting the exhaust port of the compressor 100 with the second control valve 820. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the refrigerant flowing from the second control valve 820 flows to the first outdoor heat exchanger 500 for condensation and heat release, thus defrosting the first outdoor heat exchanger 500. The refrigerant flowing from the second end of the first outdoor heat exchanger 500 flows through the fourth control valve 840 and enters the gas-liquid separator 400 from its liquid outlet. Then, the refrigerant flowing out of the inlet of the gas-liquid separator 400 flows sequentially through the seventh control valve 870, the third control valve 830, and the second outdoor heat exchanger 600 to defrost the second outdoor heat exchanger 600. The refrigerant flowing out from the second end of the second outdoor heat exchanger 600 passes through the fourth control valve 840, the sixth control valve 860, and the fifth control valve 850, and enters the compressor 100 for compression, thereby forming a second defrosting circuit in the second defrosting mode. At this time, the defrosting efficiency of the first outdoor heat exchanger 500 is higher than that of the second outdoor heat exchanger 600.

[0047] In another example, refer to Figure 7As shown, when the air conditioner operates in the second defrost mode, the fifth control valve 850, the sixth control valve 860, and the seventh control valve 870 are respectively open, while the eighth control valve 880 and the ninth control valve 890 are respectively closed. The first control valve 810 activates, connecting the exhaust port of the compressor 100 with the second control valve 820. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the refrigerant flowing from the second control valve 820 flows to the third control valve 830 and then into the second outdoor heat exchanger 600 for condensation and heat release, thus defrosting the second outdoor heat exchanger 600. The refrigerant flowing from the second end of the second outdoor heat exchanger 600 flows through the fourth control valve 840 and enters the gas-liquid separator 400 from its liquid outlet. Then, the refrigerant flowing out of the inlet of the gas-liquid separator 400 flows sequentially through the seventh control valve 870, the third control valve 830, and the second control valve 820, and flows into the first outdoor heat exchanger 500 for defrosting. The refrigerant flowing out from the second end of the first outdoor heat exchanger 500 passes through the fourth control valve 840, the sixth control valve 860, and the fifth control valve 850, and enters the compressor 100 for compression, thereby forming a second defrosting circuit in the second defrosting mode. At this time, the defrosting efficiency of the second outdoor heat exchanger 600 is higher than that of the first outdoor heat exchanger 500.

[0048] In summary, this application discloses an air conditioner that incorporates two outdoor heat exchangers and uses a gas-liquid separator 400 to separate the gas and liquid phases of the refrigerant circulating in the heat exchange cycle. During the first defrost mode, the gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, which then flows into one of the first outdoor heat exchangers 500 and 600, returning to the gas-liquid separator 400 to form the first defrost circuit. The liquid refrigerant discharged from the gas-liquid separator 400 passes through another outdoor heat exchanger outside the first defrost circuit before flowing into the compressor 100 to form a heating circuit. Thus, during the defrosting process of the outdoor heat exchangers, the air conditioner maintains its heating function for the indoor environment, improving user comfort. Furthermore, it improves the defrosting efficiency of the outdoor heat exchangers without absorbing heat from the indoor heat exchanger 200.

[0049] Reference Figure 8 This application illustrates a control method for an air conditioner according to an embodiment of the present application. The control method is applied to an air conditioner as described in any of the foregoing embodiments, and the control method may include: S801. Obtain surface temperature data of the outdoor heat exchanger assembly, wherein the surface temperature data includes: a first surface temperature value of the first outdoor heat exchanger 500 and a second surface temperature value of the second outdoor heat exchanger 600.

[0050] In this embodiment, the outdoor heat exchanger assembly may include a first outdoor heat exchanger 500 and a second outdoor heat exchanger 600. The surface temperature data may be obtained through temperature sensors; the temperature value detected by the temperature sensor located on the surface of the first outdoor heat exchanger 500 is used as the first surface temperature value. The temperature value detected by the temperature sensor located on the surface of the second outdoor heat exchanger 600 is used as the second surface temperature value. The surface temperature data includes both the first and second surface temperature values.

[0051] S802. When the surface temperature data meets the first defrosting condition, control the valve assembly 800 to operate and start the electric heating sleeve 700 to run the first defrosting mode. The first defrosting mode includes: the refrigerant discharged from the outlet of the compressor 100 flows sequentially through the indoor heat exchanger 200, the electronic expansion valve 300, and the gas-liquid separator 400. The gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, and then flows into one of the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600, and returns to the gas-liquid separator 400 to form the first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator 400 flows into the compressor 100 after passing through another outdoor heat exchanger outside the first defrosting circuit to form a heating circuit.

[0052] In this embodiment, considering that when the air conditioner is in heating mode, the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600, acting as evaporators, absorb heat from the outdoor environment. For example, when the outdoor ambient temperature is 0 degrees Celsius or below, water vapor will condense into frost on the surface of the outdoor heat exchanger, affecting its heating efficiency. Therefore, a first defrosting condition can be preset. This first defrosting condition can be a condition for determining whether defrosting is needed based on the surface temperature of the outdoor heat exchanger.

[0053] In some implementations, the first defrosting condition includes: at least one of a first surface temperature value and a second surface temperature value is less than or equal to a first temperature threshold and greater than or equal to a second temperature threshold. The first and second temperature thresholds can be determined based on actual operating results and are not limited here. For example, the first temperature threshold could be five degrees Celsius, and the second temperature threshold could be zero degrees Celsius, etc.

[0054] In one embodiment, if the first surface temperature value is between the first temperature threshold and the second temperature threshold, and the second surface temperature value is greater than the first temperature threshold, it is determined that the first outdoor heat exchanger 500 needs to be defrosted. Therefore, referring to... Figure 4 As shown, controlling the valve assembly 800 to operate and starting the electric heating sleeve 700 to run the first defrosting mode includes: The valve assembly 800 is controlled to operate, and the electric heating sleeve 700 is activated, so that the refrigerant discharged from the outlet of the compressor 100 flows sequentially through the indoor heat exchanger 200, the electronic expansion valve 300, and the gas-liquid separator 400. The gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, then flows into the first outdoor heat exchanger 500, and then flows back to the gas-liquid separator 400 to form a first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator 400 passes through the second outdoor heat exchanger 600 and then flows into the compressor 100 to form a heating circuit.

[0055] In this embodiment, the fifth control valve 850 is closed, while the sixth control valve 860 and the seventh control valve 870 are open. The first control valve 810 activates, connecting the exhaust port of the compressor 100 to the indoor heat exchanger 200. The refrigerant flowing from the indoor heat exchanger 200 then flows to the electronic expansion valve 300. All the refrigerant flowing from the electronic expansion valve 300 flows into the gas-liquid separator 400. Because the fifth control valve 850 is closed and the sixth control valve 860 is open, the gaseous refrigerant discharged from the gas-liquid separator 400 flows through the electric heating sleeve 700, obtaining high-temperature gaseous refrigerant which then flows to the fourth control valve 840. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the high-temperature gaseous refrigerant flowing out from the fourth control valve 840 flows to the second end of the first outdoor heat exchanger 500, where it condenses and releases heat, thus defrosting the first outdoor heat exchanger 500. The refrigerant flowing out from the first end of the first outdoor heat exchanger 500 sequentially passes through the second control valve 820, the third control valve 830, and the seventh control valve 870, returning to the gas-liquid separator 400 from the inlet, thereby forming the first defrosting circuit in the first defrosting mode.

[0056] The liquid refrigerant discharged from the gas-liquid separator 400 flows through the fourth control valve 840, enters the second outdoor heat exchanger 600 from the second end of the first outdoor heat exchanger 500 for evaporation and heat absorption, and the refrigerant flowing out from the first end of the second outdoor heat exchanger 600 flows sequentially through the third control valve 830, the second control valve 820, and the first control valve 810, and returns to the compressor 100 for compression, thus forming a heating cycle loop in the first defrosting mode. At this time, the first outdoor heat exchanger 500 defrosts, and the second outdoor heat exchanger 600 heats. Therefore, during the defrosting process of the first outdoor heat exchanger 500, the second outdoor heat exchanger 600 can still provide heating for the indoor environment, thereby improving the comfort of users in the indoor environment.

[0057] In another example, if the second surface temperature value is between the first temperature threshold and the second temperature threshold, and the first surface temperature value is greater than the first temperature threshold, it is determined that the second outdoor heat exchanger 600 needs to be defrosted. Therefore, referring to... Figure 5 As shown, controlling the valve assembly 800 to operate and starting the electric heating sleeve 700 to run the first defrosting mode includes: The valve assembly 800 is controlled to operate, and the electric heating sleeve 700 is activated, so that the refrigerant discharged from the outlet of the compressor 100 flows sequentially through the indoor heat exchanger 200, the electronic expansion valve 300, and the gas-liquid separator 400. Among them, the gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, then flows into the second outdoor heat exchanger 600, and then flows back to the gas-liquid separator 400 to form a first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator 400 passes through the first outdoor heat exchanger 500 and then flows into the compressor 100 to form a heating circuit.

[0058] In this embodiment, the fifth control valve 850 is closed, while the sixth control valve 860 and the seventh control valve 870 are open. The first control valve 810 activates, connecting the exhaust port of the compressor 100 to the indoor heat exchanger 200. The refrigerant flowing from the indoor heat exchanger 200 then flows to the electronic expansion valve 300. All the refrigerant flowing from the electronic expansion valve 300 flows into the gas-liquid separator 400. Because the fifth control valve 850 is closed and the sixth control valve 860 is open, the gaseous refrigerant discharged from the gas-liquid separator 400 flows through the electric heating sleeve 700, obtaining high-temperature gaseous refrigerant which then flows to the fourth control valve 840. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the high-temperature gaseous refrigerant flowing out of the fourth control valve 840 flows to the second end of the second outdoor heat exchanger 600, where it condenses and releases heat, thus defrosting the second outdoor heat exchanger 600. The refrigerant flowing out of the first end of the second outdoor heat exchanger 600 passes through the third control valve 830 and the seventh control valve 870, returning to the gas-liquid separator 400 from the inlet, thereby forming the first defrosting circuit in the first defrosting mode.

[0059] The liquid refrigerant discharged from the gas-liquid separator 400 flows through the fourth control valve 840, enters the first outdoor heat exchanger 500 from the second end for evaporation and heat absorption, and the refrigerant flowing out from the first end of the first outdoor heat exchanger 500 flows sequentially through the second control valve 820 and the first control valve 810, and returns to the compressor 100 for compression, thus forming a heating cycle loop in the first defrosting mode. At this time, the first outdoor heat exchanger 500 heats, and the second outdoor heat exchanger 600 defrosts. Therefore, during the defrosting process of the second outdoor heat exchanger 600, the indoor environment can still be heated through the first outdoor heat exchanger 500, thereby improving the comfort of users in the indoor environment.

[0060] If the surface temperature data does not meet the first defrosting condition, the first defrosting mode is stopped and the heating mode is resumed.

[0061] Reference Figure 9 This application illustrates another method for controlling an air conditioner according to an embodiment of the present application, the method including: S901. Obtain surface temperature data of the outdoor heat exchanger assembly, wherein the surface temperature data includes: a first surface temperature value of the first outdoor heat exchanger 500 and a second surface temperature value of the second outdoor heat exchanger 600.

[0062] In this embodiment, the outdoor heat exchanger assembly may include a first outdoor heat exchanger 500 and a second outdoor heat exchanger 600. The surface temperature data may be obtained through temperature sensors; the temperature value detected by the temperature sensor located on the surface of the first outdoor heat exchanger 500 is used as the first surface temperature value. The temperature value detected by the temperature sensor located on the surface of the second outdoor heat exchanger 600 is used as the second surface temperature value. The surface temperature data includes both the first and second surface temperature values.

[0063] S902. When it is determined that the surface temperature data meets the second defrosting conditions, the valve assembly 800 is controlled to operate and the electric heating sleeve 700 is stopped to operate, so that the air conditioner runs the second defrosting mode. Running the second defrosting mode includes: the refrigerant flowing out of the exhaust port of the compressor 100 flows sequentially through the first outdoor heat exchanger 500, the gas-liquid separator 400, and the second outdoor heat exchanger 600 before flowing into the compressor 100 to form the second defrosting circuit.

[0064] In this embodiment, the second defrosting condition may include: at least one of a first surface temperature value and a second surface temperature value being less than a second temperature threshold. When it is determined that the surface temperature data meets the second defrosting condition, it is determined that the air conditioner needs to operate a second defrosting mode, wherein the defrosting efficiency of the second defrosting mode is higher than that of the first defrosting mode.

[0065] In one instance, refer to Figure 6As shown, the fifth control valve 850, the sixth control valve 860, and the seventh control valve 870 are respectively open, while the eighth control valve 880 and the ninth control valve 890 are respectively closed, causing the electric heating sleeve 700 to stop working. At this time, the air conditioner operates in the second defrosting mode. The first control valve 810 is activated, connecting the exhaust port of the compressor 100 with the second control valve 820. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the refrigerant flowing from the second control valve 820 flows to the first outdoor heat exchanger 500 for condensation and heat release, thus defrosting the first outdoor heat exchanger 500. The refrigerant flowing from the second end of the first outdoor heat exchanger 500 flows through the fourth control valve 840 and enters the gas-liquid separator 400 from the liquid outlet. Then, the refrigerant flowing out of the inlet of the gas-liquid separator 400 flows sequentially through the seventh control valve 870, the third control valve 830, and the second outdoor heat exchanger 600 to defrost the second outdoor heat exchanger 600. The refrigerant flowing out from the second end of the second outdoor heat exchanger 600 passes through the fourth control valve 840, the sixth control valve 860, and the fifth control valve 850, and enters the compressor 100 for compression, thereby forming a second defrosting circuit in the second defrosting mode. At this time, the defrosting efficiency of the first outdoor heat exchanger 500 is higher than that of the second outdoor heat exchanger 600.

[0066] In another implementation, refer to Figure 7As shown, the fifth control valve 850, the sixth control valve 860, and the seventh control valve 870 are respectively open, while the eighth control valve 880 and the ninth control valve 890 are respectively closed, causing the electric heating sleeve 700 to stop working. At this time, the air conditioner operates in the second defrosting mode. The first control valve 810 activates, connecting the exhaust port of the compressor 100 with the second control valve 820. Under the combined regulation of the second control valve 820, the third control valve 830, and the fourth control valve 840, the refrigerant flowing from the second control valve 820 flows to the third control valve 830 and then flows into the second outdoor heat exchanger 600 for condensation and heat release, thus defrosting the second outdoor heat exchanger 600. The refrigerant flowing from the second end of the second outdoor heat exchanger 600 flows through the fourth control valve 840 and enters the gas-liquid separator 400 from the liquid outlet. Then, the refrigerant flowing out of the inlet of the gas-liquid separator 400 flows sequentially through the seventh control valve 870, the third control valve 830, and the second control valve 820, and flows into the first outdoor heat exchanger 500 for defrosting. The refrigerant flowing out from the second end of the first outdoor heat exchanger 500 passes through the fourth control valve 840, the sixth control valve 860, and the fifth control valve 850, and enters the compressor 100 for compression, thereby forming a second defrosting circuit in the second defrosting mode. At this time, the defrosting efficiency of the second outdoor heat exchanger 600 is higher than that of the first outdoor heat exchanger 500.

[0067] When the air conditioner is running in the second defrost mode, due to its high defrost efficiency and short defrost time, it achieves rapid defrosting while minimizing indoor temperature fluctuations. After stopping the second defrost mode (once it is determined that the surface temperature data does not meet the second defrost conditions), it resumes operation in heating mode.

[0068] In one or more embodiments, when the surface temperature is detected to meet the third defrosting condition, the valve assembly 800 is controlled to operate and the electric heating sleeve 700 is stopped, causing the air conditioner to operate in the third defrosting mode. The third defrosting mode includes alternating operation of the first defrosting mode and the second defrosting mode. For example, the second defrosting condition is that at least one of the first and second surface temperature values ​​is less than a second temperature threshold, and both are greater than or equal to a third temperature threshold. For example, the third temperature threshold could be -10 degrees Celsius or -20 degrees Celsius, etc. Correspondingly, the third defrosting condition may include at least one of the first and second surface temperature values ​​being less than the third temperature threshold. When the surface temperature data meets the third defrosting condition, it is determined that there is a significant amount of frost condensation on the outdoor heat exchanger and the outdoor ambient temperature is low.

[0069] Therefore, the air conditioner can alternate between the first defrosting mode and the second defrosting mode, which can improve defrosting efficiency and continuously heat the indoor environment. While ensuring that the heating capacity is not significantly reduced, it can also improve the user's comfort and the heating efficiency of the air conditioner, and achieve rapid removal of frost on the surface of the outdoor heat exchanger.

[0070] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of this application are not limited to the described order of actions, because according to the embodiments of this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of this application.

[0071] Reference Figure 10 This application illustrates a control device for an air conditioner, which is applied in an air conditioner as described in any of the preceding embodiments. The control device may include: The data acquisition module 1001 is used to acquire surface temperature data of the outdoor heat exchanger assembly, wherein the surface temperature data includes: a first surface temperature value of the first outdoor heat exchanger 500 and a second surface temperature value of the second outdoor heat exchanger 600.

[0072] The mode switching module 1002 is used to control the valve assembly 800 to operate and start the electric heating sleeve 700 to work when the surface temperature data meets the first defrosting condition, and to run the first defrosting mode. The first defrosting mode includes: the refrigerant discharged from the outlet of the compressor 100 flows sequentially through the indoor heat exchanger 200, the electronic expansion valve 300, and the gas-liquid separator 400. The gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, and then flows into one of the first outdoor heat exchanger 500 and the second outdoor heat exchanger 600, and returns to the gas-liquid separator 400 to form the first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator 400 flows into the compressor 100 after passing through another outdoor heat exchanger outside the first defrosting circuit to form a heating circuit.

[0073] In one or more embodiments, the first defrosting condition includes: at least one of the first surface temperature value and the second surface temperature value is less than or equal to the first temperature threshold and greater than or equal to the second temperature threshold.

[0074] In one or more embodiments, when the first surface temperature value is between the first temperature threshold and the second temperature threshold, and the second surface temperature value is greater than the first temperature threshold, the mode switching module 1002 is further used to control the valve assembly 800 to operate and start the electric heating sleeve 700, so that the refrigerant discharged from the outlet of the compressor 100 flows sequentially through the indoor heat exchanger 200, the electronic expansion valve 300, and the gas-liquid separator 400. Among them, the gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, flows into the first outdoor heat exchanger 500, and then flows back to the gas-liquid separator 400 to form a first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator 400 flows into the compressor 100 after passing through the second outdoor heat exchanger 600 to form a heating circuit.

[0075] In one or more embodiments, when the second surface temperature value is between the first temperature threshold and the second temperature threshold, and the first surface temperature value is greater than the first temperature threshold, the mode switching module 1002 is further used to control the valve assembly 800 to operate and start the electric heating sleeve 700, so that the refrigerant discharged from the outlet of the compressor 100 flows sequentially through the indoor heat exchanger 200, the electronic expansion valve 300, and the gas-liquid separator 400. Among them, the gaseous refrigerant discharged from the gas-liquid separator 400 is heated by the electric heating sleeve 700 to form a high-temperature gaseous refrigerant, flows into the second outdoor heat exchanger 600, and then flows back to the gas-liquid separator 400 to form a first defrosting circuit. The liquid refrigerant discharged from the gas-liquid separator 400 flows into the compressor 100 after passing through the first outdoor heat exchanger 500 to form a heating circuit.

[0076] In one or more embodiments, the mode switching mode 1002 is further configured to, upon determining that the surface temperature data meets the second defrosting conditions, control the valve assembly 800 to operate and stop the electric heating sleeve 700 from working, thereby causing the air conditioner to operate in a second defrosting mode. Operating the second defrosting mode includes: refrigerant flowing from the exhaust port of the compressor 100 sequentially flowing through the first outdoor heat exchanger 500, the gas-liquid separator 400, and the second outdoor heat exchanger 600 before flowing into the compressor 100 to form a second defrosting circuit. Alternatively, operating the second defrosting mode includes: refrigerant flowing from the exhaust port of the compressor 100 sequentially flowing through the second outdoor heat exchanger 600, the gas-liquid separator 400, and the first outdoor heat exchanger 500 before flowing into the compressor 100 to form a second defrosting circuit.

[0077] In one or more embodiments, mode switching mode 1002 is further used to control the valve assembly 800 to operate and stop the electric heating sleeve 700 when the surface temperature data is determined to meet the third defrosting conditions, so that the air conditioner operates in the third defrosting mode. The third defrosting mode includes: alternating operation of the first defrosting mode and the second defrosting mode. Operating the second defrosting mode includes: refrigerant flowing from the exhaust port of the compressor 100 sequentially flowing through the first outdoor heat exchanger 500, the gas-liquid separator 400, and the second outdoor heat exchanger 600 before flowing into the compressor 100 to form a second defrosting circuit. Alternatively, operating the second defrosting mode includes: refrigerant flowing from the exhaust port of the compressor 100 sequentially flowing through the second outdoor heat exchanger 600, the gas-liquid separator 400, and the first outdoor heat exchanger 500 before flowing into the compressor 100 to form a second defrosting circuit.

[0078] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0079] It will be readily apparent to those skilled in the art that any combination of the above embodiments is feasible, and therefore any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0080] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0081] Similarly, it should be understood that, in order to simplify the invention and aid in understanding one or more of the various inventive aspects, features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the above description of exemplary embodiments of the invention. However, this disclosure should not be construed as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in fewer than all features of the single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0082] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0083] An electronic device, comprising: One or more processors; Memory; One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs being configured to perform the methods described in the above embodiments.

[0084] A computer-readable storage medium stores a computer program for use in conjunction with an electronic device, the computer program being executable by a processor to perform the methods described in the embodiments above.

[0085] A computer program product includes a computer program / computer executable instructions, which, when executed by a processor in an electronic device, implement the method described in any of the above-described embodiments.

[0086] Those skilled in the art will understand that embodiments of this application can be provided as methods, apparatus, or computer program products. Therefore, embodiments of this application can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of this application can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0087] This application describes embodiments with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0088] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0090] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0091] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0092] The present invention has provided a detailed description of an air conditioner, an air conditioner control method, and an air conditioner control device. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises: a compressor (100); an indoor heat exchanger (200) in communication with the compressor (100) through a connecting pipeline; an electronic expansion valve (300) in communication with the indoor heat exchanger (200) through the connecting pipeline; a gas-liquid separator (400) in communication with the electronic expansion valve (300) and the compressor (100) through the connecting pipeline respectively; a first outdoor heat exchanger (500) in communication with the compressor (100) and the gas-liquid separator (400) through the connecting pipeline respectively; a second outdoor heat exchanger (600) in communication with the compressor (100) and the gas-liquid separator (400) through the connecting pipeline respectively; an electric heating sleeve (700) sleeved on the connecting pipeline to heat the refrigerant flowing through the connecting pipeline; a valve assembly (800) comprising a plurality of valves and arranged in the connecting pipeline to control the opening and closing state of the connecting pipeline; when the air conditioner operates in a first defrosting mode, the refrigerant discharged from the gas outlet of the compressor (100) sequentially flows through the indoor heat exchanger (200), the electronic expansion valve (300) and the gas-liquid separator (400), the gaseous refrigerant discharged from the gas-liquid separator (400) is heated by the electric heating sleeve (700) to form high-temperature gaseous refrigerant, then flows into one of the first outdoor heat exchanger (500) and the second outdoor heat exchanger (600), and returns to the gas-liquid separator (400) to form a first defrosting circuit; the liquid refrigerant discharged from the gas-liquid separator (400) flows through the other outdoor heat exchanger except the first defrosting circuit, and then flows into the compressor (100) to form a heating circuit.

2. The air conditioner of claim 1, wherein The valve assembly (800) comprises: a first control valve (810) in communication with the gas outlet of the compressor (100), the indoor heat exchanger (200), the first end of the first outdoor heat exchanger (500), the gas inlet of the compressor (100) and the gas-liquid separator (400) respectively; a second control valve (820) in communication with the first control valve (810) and the first end of the first outdoor heat exchanger (500) respectively; a third control valve (830) in communication with the first end of the second outdoor heat exchanger (600), the second control valve (820) and the gas-liquid separator (400) respectively; a fourth control valve (840) in communication with the connection pipeline between the gas inlet of the compressor (100) and the gas-liquid separator (400), the gas-liquid separator (400), the second end of the first outdoor heat exchanger (500), and the second end of the second outdoor heat exchanger (600); a fifth control valve (850) in communication with the gas inlet of the compressor (100) and the gas-liquid separator (400); a sixth control valve (860) in communication with the fourth control valve (840), the fifth control valve (850), and the gas-liquid separator (400), wherein the electric heating jacket (700) is sleeved on the connection pipeline between the fourth control valve (840) and the sixth control valve (860); a seventh control valve (870) in communication with the connection pipeline between the electronic expansion valve (300) and the gas-liquid separator (400) and the third control valve (830).

3. The air conditioner of claim 2, wherein The valve assembly (800) further comprises: an eighth control valve (880) embedded in the connection pipeline between the sixth control valve (860) and the gas-liquid separator (400); a ninth control valve (890) embedded in the connection pipeline between the first control valve (810) and the gas inlet of the compressor (100); wherein, when the air conditioner operates in the second defrosting mode, the first control valve (810), the second control valve (820), the third control valve (830), and the fourth control valve (840) act, the fifth control valve (850), the sixth control valve (860), and the seventh control valve (870) are turned on, and the eighth control valve (880) and the ninth control valve (890) are closed, so that the refrigerant flowing out of the gas outlet of the compressor (100) sequentially flows through the first outdoor heat exchanger (500), the gas-liquid separator (400), and the second outdoor heat exchanger (600) and then flows into the compressor (100) to form a second defrosting circuit; or, when the air conditioner operates in the second defrosting mode, the first control valve (810), the second control valve (820), the third control valve (830), and the fourth control valve (840) act, the fifth control valve (850), the sixth control valve (860), and the seventh control valve (870) are turned on, and the eighth control valve (880) and the ninth control valve (890) are closed, so that the refrigerant flowing out of the gas outlet of the compressor (100) sequentially flows through the second outdoor heat exchanger (600), the gas-liquid separator (400), and the first outdoor heat exchanger (500) and then flows into the compressor (100) to form a second defrosting circuit.

4. A control method of an air conditioner, characterized by, The control method is applied to the air conditioner of any one of claims 1-3, and the control method comprises: obtaining surface temperature data of the outdoor heat exchanger assembly, wherein the surface temperature data comprises a first surface temperature value of the first outdoor heat exchanger (500) and a second surface temperature value of the second outdoor heat exchanger (600); in a case where it is determined that the surface temperature data satisfies a first defrosting condition, controlling the valve assembly (800) to act and starting the electric heating sleeve (700) to work, to run a first defrosting mode, wherein running the first defrosting mode comprises: the refrigerant discharged from the gas outlet of the compressor (100) sequentially flows through the indoor heat exchanger (200), the electronic expansion valve (300), and the gas-liquid separator (400), the gas refrigerant discharged from the gas-liquid separator (400) is heated by the electric heating sleeve (700) to form high-temperature gas refrigerant, and then flows into one of the first outdoor heat exchanger (500) and the second outdoor heat exchanger (600), and returns to the gas-liquid separator (400) to form a first defrosting loop, and the liquid refrigerant discharged from the gas-liquid separator (400) flows into the other outdoor heat exchanger outside the first defrosting loop, and then flows into the compressor (100) to form a heating loop.

5. The control method of the air conditioner according to claim 4, characterized by, The first defrosting condition comprises that at least one of the first surface temperature value and the second surface temperature value is less than or equal to a first temperature threshold and greater than or equal to a second temperature threshold.

6. The control method of the air conditioner according to claim 5, characterized by, In a case where the first surface temperature value is between the first temperature threshold and the second temperature threshold, and the second surface temperature value is greater than the first temperature threshold, the control of the valve assembly (800) to act and the starting of the electric heating sleeve (700) to work, to run the first defrosting mode, comprises: controlling the valve assembly (800) to act and starting the electric heating sleeve (700) to work, so that the refrigerant discharged from the gas outlet of the compressor (100) sequentially flows through the indoor heat exchanger (200), the electronic expansion valve (300), and the gas-liquid separator (400), wherein the gas refrigerant discharged from the gas-liquid separator (400) is heated by the electric heating sleeve (700) to form high-temperature gas refrigerant, and then flows into the first outdoor heat exchanger (500), and then returns to the gas-liquid separator (400) to form a first defrosting loop, and the liquid refrigerant discharged from the gas-liquid separator (400) flows through the second outdoor heat exchanger (600), and then flows into the compressor (100) to form a heating loop.

7. The control method of the air conditioner of claim 5, in a case where the second surface temperature value is between the first temperature threshold and the second temperature threshold, and the first surface temperature value is greater than the first temperature threshold, the control of the valve assembly (800) to act and the starting of the electric heating sleeve (700) to work, to run the first defrosting mode, comprises: The valve assembly (800) is controlled to act, and the electric heating sleeve (700) is started to work, so that the refrigerant discharged from the outlet of the compressor (100) sequentially flows through the indoor heat exchanger (200), the electronic expansion valve (300), and the gas-liquid separator (400), wherein the gas refrigerant discharged from the gas-liquid separator (400) flows into the second outdoor heat exchanger (600) after being heated by the electric heating sleeve (700) to form high-temperature gas refrigerant, and then flows back to the gas-liquid separator (400) to form a first defrosting circuit, and the liquid refrigerant discharged from the gas-liquid separator (400) flows into the compressor (100) after passing through the first outdoor heat exchanger (500) to form a heating circuit.

8. The control method of the air conditioner according to claim 4, characterized by, The control method further comprises: In a case where it is determined that the surface temperature data satisfies a second defrosting condition, the valve assembly (800) is controlled to act, and the electric heating sleeve (700) is stopped to work, so that the air conditioner operates a second defrosting mode, and operating the second defrosting mode comprises: the refrigerant flowing out of the outlet of the compressor (100) sequentially flows through the first outdoor heat exchanger (500), the gas-liquid separator (400), and the second outdoor heat exchanger (600) to flow into the compressor (100) to form a second defrosting circuit; or, Operating the second defrosting mode comprises: the refrigerant flowing out of the outlet of the compressor (100) sequentially flows through the second outdoor heat exchanger (600), the gas-liquid separator (400), and the first outdoor heat exchanger (500) to flow into the compressor (100) to form a second defrosting circuit.

9. The control method of the air conditioner according to claim 4, characterized by, The control method further comprises: In a case where it is determined that the surface temperature data satisfies a third defrosting condition, the valve assembly (800) is controlled to act, and the electric heating sleeve (700) is stopped to work, so that the air conditioner operates a third defrosting mode, wherein the third defrosting mode comprises: the first defrosting mode and the second defrosting mode are alternately operated, and operating the second defrosting mode comprises: the refrigerant flowing out of the outlet of the compressor (100) sequentially flows through the first outdoor heat exchanger (500), the gas-liquid separator (400), and the second outdoor heat exchanger (600) to flow into the compressor (100) to form a second defrosting circuit; or, Operating the second defrosting mode comprises: the refrigerant flowing out of the outlet of the compressor (100) sequentially flows through the second outdoor heat exchanger (600), the gas-liquid separator (400), and the first outdoor heat exchanger (500) to flow into the compressor (100) to form a second defrosting circuit.

10. A control device for an air conditioner, characterized by comprising: The control device is applied to the air conditioner of any one of claims 1-3, and the control device comprises: A data acquisition module is configured to acquire surface temperature data of an outdoor heat exchanger assembly, wherein the surface temperature data comprises a first surface temperature value of a first outdoor heat exchanger (500) and a second surface temperature value of a second outdoor heat exchanger (600); The mode switching module is configured to, when it is determined that the surface temperature data satisfies the first defrosting condition, control the valve assembly (800) to act and the electric heating sleeve (700) to work, and run a first defrosting mode. The first defrosting mode includes: the refrigerant discharged from the outlet of the compressor (100) sequentially flows through the indoor heat exchanger (200), the electronic expansion valve (300), and the gas-liquid separator (400), the gas refrigerant discharged from the gas-liquid separator (400) is heated by the electric heating sleeve (700) to form high-temperature gas refrigerant, and then flows into one of the first outdoor heat exchanger (500) and the second outdoor heat exchanger (600), and returns to the gas-liquid separator (400) to form a first defrosting loop, and the liquid refrigerant discharged from the gas-liquid separator (400) flows through the other outdoor heat exchanger except the first defrosting loop, and then flows into the compressor (100) to form a heating loop.

11. An electronic device, comprising: Comprising: one or more processors; memory; one or more programs stored in the memory and configured for execution by the one or more processors, the one or more programs configured for performing the method of any of claims 4-9.

12. A computer readable storage medium storing a computer program for use in conjunction with an electronic device, the computer program comprising instructions for causing the electronic device to perform the method of any one of claims 1-11. The computer program can be executed by a processor to complete the method of any of claims 4-9.

13. A computer program product comprising computer program / computer executable instructions, characterized in that, The computer program / computer executable instructions, when executed by a processor in an electronic device, implement the method of any of claims 4-9.

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