Indoor heat exchange assembly, air conditioner and control method thereof

Abstract

The application discloses an indoor heat exchange assembly, an air conditioner and a control method of the air conditioner. The indoor heat exchange assembly comprises a first evaporator and a second evaporator. An inlet of a gas-liquid separator is connected with an outlet of the first evaporator. A liquid outlet of the gas-liquid separator is connected with an inlet of the second evaporator. A gas outlet of the gas-liquid separator is connected with an outlet of the second evaporator. An adjusting valve is connected between the second evaporator and the gas-liquid separator. The gas-liquid separator is used for separating the refrigerant passing through the first evaporator into liquid refrigerant and gas refrigerant. The separated liquid refrigerant is transported to the second evaporator. The flow of the liquid refrigerant flowing into the second evaporator is adjusted through the adjusting valve. The flow of the liquid refrigerant can be controlled according to the use requirement, the purpose of adjusting the outlet air temperature is achieved, and the problem that the flow of the liquid refrigerant flowing into the second evaporator is too large to cause large heat exchange capacity and the like can be avoided. The outlet air temperature is more uniform, and the user comfort is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, and in particular to an indoor heat exchange assembly, an air conditioner and a control method of the air conditioner. BACKGROUND

[0002] During the use of the air conditioner in the cooling mode, the gaseous refrigerant increases and the liquid refrigerant decreases after the refrigerant exchanges heat through the evaporator, and the mixed medium of gas-liquid two phases exists in the evaporator, which leads to low refrigerant flow rate, low heat exchange efficiency, reduced cooling effect of the air conditioner, uneven air outlet temperature and affected actual use experience of the user. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an indoor heat exchange assembly, which can separate the liquid and gaseous refrigerants and adjust the flow rate of the liquid refrigerant into the liquid refrigerant, so as to realize uniform air outlet temperature and improve the user experience.

[0004] The present application also provides an air conditioner using the above indoor heat exchange assembly, a control method, a control device and a computer readable storage medium of the air conditioner.

[0005] The indoor heat exchange assembly according to the first aspect of the present application is used in an air conditioner indoor unit, which comprises:

[0006] a first evaporator;

[0007] a second evaporator;

[0008] a gas-liquid separator, the inlet of the gas-liquid separator is connected with the outlet of the first evaporator, the liquid outlet of the gas-liquid separator is connected with the inlet of the second evaporator, the gas outlet of the gas-liquid separator is connected with the outlet of the second evaporator, and the inlet of the first evaporator is used for inputting refrigerant;

[0009] an adjusting valve, which is connected between the second evaporator and the gas-liquid separator and is used for adjusting the flow rate of the liquid refrigerant of the gas-liquid separator flowing into the second evaporator.

[0010] The indoor heat exchange assembly according to the first aspect of the present application has at least the following beneficial effects:

[0011] By adding a gas-liquid separator and a regulating valve to the indoor unit of the air conditioner, the gas-liquid separator separates the refrigerant from the first evaporator, and the separated liquid refrigerant is transported to the second evaporator. The regulating valve adjusts the flow rate of the liquid refrigerant flowing into the second evaporator. The flow rate of the liquid refrigerant can be controlled according to usage requirements to achieve the purpose of regulating the outlet air temperature. It can also avoid problems such as excessive heat exchange caused by excessive flow of liquid refrigerant into the second evaporator, resulting in a more uniform outlet air temperature and better user comfort.

[0012] According to some embodiments of the present invention, the regulating valve is an electronic expansion valve or a solenoid valve, and the electronic expansion valve or the solenoid valve is connected between the liquid outlet of the gas-liquid separator and the inlet of the second evaporator.

[0013] According to some embodiments of the present invention, the regulating valve is a four-way valve, which is used to connect the liquid outlet of the gas-liquid separator to the inlet of the second evaporator, and switch to connect the gas outlet of the gas-liquid separator to the inlet of the second evaporator.

[0014] An air conditioner according to a second aspect embodiment of the present invention includes:

[0015] compressor;

[0016] Outdoor heat exchanger;

[0017] In the indoor heat exchange assembly described in the first aspect embodiment above, the inlet of the first evaporator is connected to the first port of the outdoor heat exchanger, the outlet of the second evaporator is connected to the inlet of the compressor, and the outlet of the compressor is connected to the second port of the outdoor heat exchanger.

[0018] Temperature sensor used to obtain indoor ambient temperature;

[0019] The controller is used to control the operating state of the regulating valve according to the indoor ambient temperature when the air conditioner is in cooling mode.

[0020] The air conditioner according to the second aspect embodiment of the present invention has at least the following beneficial effects:

[0021] The air conditioner uses the indoor heat exchange component described in the above embodiment as the indoor heat exchanger. A gas-liquid separator separates the refrigerant from the first evaporator, delivering the separated liquid refrigerant to the second evaporator. A regulating valve adjusts the flow rate of the liquid refrigerant into the second evaporator. An indoor ambient temperature sensor is used to acquire the indoor temperature, thereby controlling the flow rate of the liquid refrigerant to regulate the outlet air temperature. This avoids problems such as excessive heat exchange due to excessive liquid refrigerant flow into the second evaporator, resulting in a more uniform indoor temperature and improved user comfort.

[0022] According to a third aspect of the present invention, the air conditioner includes a compressor, an outdoor heat exchanger, and an indoor heat exchange assembly. The indoor heat exchange assembly includes a first evaporator, a second evaporator, a gas-liquid separator, and a regulating valve. The inlet of the gas-liquid separator is connected to the outlet of the first evaporator, the liquid outlet of the gas-liquid separator is connected to the inlet of the second evaporator, the gas outlet of the gas-liquid separator and the outlet of the second evaporator are both connected to the inlet of the compressor, the inlet of the first evaporator is connected to one port of the outdoor heat exchanger, the outlet of the compressor is connected to the other port of the outdoor heat exchanger, and the regulating valve is connected between the second evaporator and the gas-liquid separator.

[0023] The control method includes:

[0024] Obtain indoor ambient temperature;

[0025] When the air conditioner is in cooling mode, the operating state of the regulating valve is controlled according to the indoor ambient temperature to regulate the flow rate of liquid refrigerant flowing from the gas-liquid separator into the second evaporator.

[0026] The control method for an air conditioner according to a third aspect embodiment of the present invention has at least the following beneficial effects:

[0027] The air conditioner incorporates a gas-liquid separator and a regulating valve in the indoor unit. The gas-liquid separator separates the refrigerant from the first evaporator, transferring the separated liquid refrigerant to the second evaporator. When the air conditioner is in cooling mode, the regulating valve is controlled based on the indoor ambient temperature. This allows the valve to regulate the flow of liquid refrigerant into the second evaporator, thereby adjusting the outlet air temperature. Furthermore, it prevents excessive liquid refrigerant flow into the second evaporator, which could lead to excessive heat exchange, resulting in a more uniform indoor temperature and improved user comfort.

[0028] According to some embodiments of the present invention, when the regulating valve is an electronic expansion valve connected between the liquid outlet of the gas-liquid separator and the inlet of the second evaporator, controlling the operating state of the regulating valve according to the indoor ambient temperature includes:

[0029] When the indoor ambient temperature is less than or equal to the first set temperature, the electronic expansion valve is controlled to reduce its opening or operate at its minimum opening.

[0030] According to some embodiments of the present invention, controlling the operating state of the regulating valve based on the indoor ambient temperature further includes:

[0031] When the indoor ambient temperature is greater than the first set temperature, the electronic expansion valve is controlled to increase its opening.

[0032] According to some embodiments of the present invention, controlling the operating state of the regulating valve based on the indoor ambient temperature further includes:

[0033] After controlling the electronic expansion valve to increase its opening, the indoor ambient temperature is compared with the second set temperature, and the second set temperature is greater than the first set temperature.

[0034] When the indoor ambient temperature is less than or equal to the second set temperature, the electronic expansion valve is controlled to reduce its opening or operate at its minimum opening.

[0035] According to some embodiments of the present invention, when the regulating valve is a solenoid valve connected between the liquid outlet of the gas-liquid separator and the inlet of the second evaporator, controlling the operating state of the regulating valve according to the indoor ambient temperature includes:

[0036] When the indoor ambient temperature is less than or equal to the first set temperature, the solenoid valve is controlled to close.

[0037] According to some embodiments of the present invention, controlling the operating state of the regulating valve based on the indoor ambient temperature further includes:

[0038] When the indoor ambient temperature is higher than the first set temperature, the solenoid valve is kept open.

[0039] According to some embodiments of the present invention, controlling the operating state of the regulating valve based on the indoor ambient temperature further includes:

[0040] After controlling the solenoid valve to remain open, the indoor ambient temperature is compared with the second set temperature, and the second set temperature is greater than the first set temperature.

[0041] When the indoor ambient temperature is less than or equal to the second set temperature, the solenoid valve is closed.

[0042] According to some embodiments of the present invention, when the regulating valve is a four-way valve, controlling the operating state of the regulating valve according to the indoor ambient temperature includes:

[0043] When the indoor ambient temperature is less than or equal to the first set temperature, the four-way valve is controlled to switch to a state where the outlet of the gas-liquid separator is connected to the inlet of the second evaporator.

[0044] According to some embodiments of the present invention, controlling the operating state of the regulating valve based on the indoor ambient temperature further includes:

[0045] When the indoor ambient temperature is greater than the first set temperature, the four-way valve is controlled to keep the liquid outlet of the gas-liquid separator connected to the inlet of the second evaporator.

[0046] According to some embodiments of the present invention, controlling the operating state of the regulating valve based on the indoor ambient temperature further includes:

[0047] After controlling the four-way valve to keep the liquid outlet of the gas-liquid separator connected to the inlet of the second evaporator, the indoor ambient temperature is compared with the second set temperature, and the second set temperature is greater than the first set temperature.

[0048] When the indoor ambient temperature is less than or equal to the second set temperature, the control is executed to switch the four-way valve to a state where the outlet of the gas-liquid separator is connected to the inlet of the second evaporator.

[0049] A control device according to a fourth aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the control method as described in the third aspect of the present invention.

[0050] A computer-readable storage medium according to a fifth aspect of the present invention stores computer-executable instructions for causing a computer to perform the control method as described in the third aspect of the present invention.

[0051] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0052] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0053] Figure 1 This is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0054] Figure 2 This is a schematic diagram of the structure of an indoor heat exchange component including an electronic expansion valve according to an embodiment of the present invention;

[0055] Figure 3 This is a schematic diagram of the structure of an indoor heat exchange component including a solenoid valve according to an embodiment of the present invention;

[0056] Figure 4 This is a schematic diagram of the structure of an indoor heat exchange component including a four-way valve according to an embodiment of the present invention;

[0057] Figure 5 This is a flowchart of an air conditioner control method according to an embodiment of the present invention;

[0058] Figure 6 This is a flowchart of a control method for an air conditioner according to another embodiment of the present invention;

[0059] Figure 7 This is a flowchart of a control method for an air conditioner according to another embodiment of the present invention;

[0060] Figure 8 This is a flowchart of a control method for an air conditioner according to another embodiment of the present invention.

[0061] Figure label:

[0062] Indoor heat exchanger 100; first evaporator 110; second evaporator 120; gas-liquid separator 130; electronic expansion valve 140; solenoid valve 150; four-way valve 160; outdoor heat exchanger 200; compressor 300; reversing valve 400; throttling component 500. Detailed Implementation

[0063] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0064] In the description of this invention, the use of terms such as "first," "second," etc., is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0065] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0066] In the description of this invention, it should be noted that, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0067] Figure 1The diagram shows the working principle of an air conditioning system. The outdoor heat exchanger 200, indoor heat exchanger 100, reversing valve 400, throttling device 500, and compressor 300 are connected to form a refrigerant circulation loop. The inlet and outlet of compressor 300 are connected to reversing valve 400, and both indoor heat exchanger 100 and outdoor heat exchanger 200 are connected to reversing valve 400. Outdoor heat exchanger 200 is connected to indoor heat exchanger 100 through throttling device 500.

[0068] In heating mode, the refrigerant output from compressor 300 flows to indoor heat exchanger 100 after passing through reversing valve 400. After heat exchange in indoor heat exchanger 100, the refrigerant flows to outdoor heat exchanger 200, and then flows back to compressor 300 through reversing valve 400. In cooling mode, the refrigerant output from compressor 300 passes through outdoor heat exchanger 200, then flows to indoor heat exchanger 100 through throttling device 500 for heat exchange, and finally flows back to compressor 300 through reversing valve 400.

[0069] Considering the relevant technology, during the cooling mode operation of the air conditioner, the indoor heat exchanger 100 is an evaporator. After the low-temperature and low-pressure refrigerant passes through the evaporator for heat exchange, the amount of gaseous refrigerant increases and the amount of liquid refrigerant decreases. There is a mixture of gaseous and liquid refrigerant in the evaporator, which leads to a low refrigerant flow rate and a lower heat exchange efficiency. This affects the energy efficiency of the air conditioner, reduces the cooling effect, and causes uneven air outlet temperature, affecting the user's actual user experience.

[0070] Based on this, this embodiment of the invention adds a gas-liquid separator 130 and a regulating valve to the indoor unit of the air conditioner. The evaporator includes a first evaporator 110 and a second evaporator 120. The gas-liquid separator 130 separates the refrigerant passing through the first evaporator 110 into gas and liquid, and transports the separated liquid refrigerant to the second evaporator 120. The regulating valve regulates the flow rate of the liquid refrigerant flowing into the second evaporator 120. The flow rate of the liquid refrigerant can be controlled according to usage requirements to achieve the purpose of regulating the outlet air temperature, which is beneficial to improving heat exchange efficiency. In addition, it can avoid problems such as excessive flow of liquid refrigerant entering the second evaporator 120, which would lead to excessive heat exchange, resulting in a more uniform outlet air temperature and better user comfort.

[0071] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0072] refer to Figures 2 to 4 The indoor heat exchange component described in the embodiments of the present invention, Figure 1 The indoor heat exchanger 100 shown includes an indoor heat exchange component according to an embodiment, which is suitable for split-type air conditioners, unitary air conditioners, etc. The indoor heat exchange component will be described below with specific examples.

[0073] See Figure 2 , Figure 3 and Figure 4 As shown, the indoor heat exchange component of this embodiment is installed in the indoor unit of an air conditioner. The indoor heat exchange component includes a first evaporator 110 and a second evaporator 120. In cooling mode, the refrigerant can sequentially pass through the first evaporator 110 and the second evaporator 120 for heat exchange. It can be understood that the indoor heat exchange component can be an integral evaporator structure, dividing the evaporator into two parts, one being the first evaporator 110 and the other the second evaporator 120; alternatively, the indoor heat exchange component can include two evaporators, one being the first evaporator 110 and the other the second evaporator 120. No further limitation is made here.

[0074] A refrigerant bypass is added between the first evaporator 110 and the second evaporator 120. This bypass is connected to a gas-liquid separator 130 and a regulating valve. The gas-liquid separator 130 separates the refrigerant passing through the first evaporator 110 into gaseous and liquid refrigerant. During normal operation of the indoor unit, the gas-liquid separator 130 delivers the liquid refrigerant to the second evaporator 120 for further heat exchange, while the gaseous refrigerant does not pass through the second evaporator 120. The regulating valve regulates the flow rate of the liquid refrigerant entering the second evaporator 120.

[0075] Specifically, the gas-liquid separator 130 includes an inlet, a liquid outlet, and a gas outlet. A mixture of gaseous and liquid refrigerant enters the gas-liquid separator 130 through the inlet. After separation by the gas-liquid separator 130, the liquid refrigerant is output from the liquid outlet, and the gaseous refrigerant is output from the gas outlet. The inlet of the gas-liquid separator 130 is connected to the outlet of the first evaporator 110, the liquid outlet is connected to the inlet of the second evaporator 120, and the gas outlet is connected to the outlet of the second evaporator 120. The inlet of the first evaporator 110 is connected to the throttling device 500 of the outdoor unit of the air conditioner, and the outlet of the second evaporator 120 is connected to the four-way valve 160 of the outdoor unit of the air conditioner. See the connection structure of the outdoor unit for details. Figure 1 The diagram shown will not be repeated here.

[0076] See Figure 2 , Figure 3 and Figure 4As shown, during cooling mode operation, the refrigerant, after passing through the throttling device 500, forms a low-temperature, low-pressure refrigerant, which then enters the first evaporator 110. After heat exchange in the first evaporator 110, the refrigerant enters the gas-liquid separator 130. Since the refrigerant contains a mixture of gaseous and liquid refrigerant after heat exchange, the gas-liquid separator 130 separates the gaseous and liquid refrigerant. The liquid refrigerant then enters the second evaporator 120 for heat exchange, while the gaseous refrigerant bypasses the second evaporator 120 and flows back to the compressor 300 via the refrigerant bypass. The arrows in the diagram indicate the direction of refrigerant flow.

[0077] Understandably, after being throttled by the throttling device 500, the refrigerant becomes low-temperature, low-pressure, and primarily liquid. After heat exchange in the first evaporator 110, the amount of gaseous refrigerant increases while the amount of liquid refrigerant decreases. Considering that mixing gaseous and liquid refrigerants would reduce the refrigerant flow rate, and that liquid refrigerant contains a large amount of latent heat while gaseous refrigerant only has a small amount of sensible heat, the mixed refrigerant would reduce heat exchange efficiency and affect the cooling effect. Therefore, this embodiment of the invention uses a gas-liquid separator 130 to separate the gaseous and liquid refrigerants, allowing the liquid refrigerant to enter the second evaporator 120 for further heat exchange. Since the gaseous refrigerant has low heat exchange efficiency, it bypasses the second evaporator 120, thereby effectively improving heat exchange efficiency, resulting in more efficient cooling and a better user experience.

[0078] It should be noted that because liquid refrigerant has a large amount of latent heat, when only liquid refrigerant passes through the second evaporator 120, the heat exchange capacity of the second evaporator 120 is large, resulting in rapid cooling and a quick reduction in the outlet air temperature. Considering that excessive cooling capacity can easily lead to excessively low outlet air temperatures, resulting in uneven outlet air temperatures and reduced user comfort, and that condensation may easily occur on the evaporator, causing dripping and other problems, this embodiment adds a regulating valve to the refrigerant bypass. This regulating valve can adjust the flow rate of liquid refrigerant entering the second evaporator 120. For example, by reducing or shutting off the flow rate of liquid refrigerant through the regulating valve, the flow rate of liquid refrigerant entering the second evaporator 120 is reduced, thereby reducing the cooling capacity of the second evaporator 120 and achieving the purpose of regulating the outlet air temperature. This results in a more uniform outlet air temperature and better user comfort.

[0079] See Figure 2 As shown, Figure 2This is a schematic diagram of an indoor heat exchange component provided in one embodiment of the present invention. The regulating valve used in this embodiment is an electronic expansion valve 140. The electronic expansion valve 140 regulates the flow rate of the liquid refrigerant by adjusting its opening degree. Specifically, increasing the opening degree of the electronic expansion valve 140 increases the flow rate of the liquid refrigerant, and conversely, decreasing the opening degree decreases the flow rate. Specifically, one port of the electronic expansion valve 140 is connected to the liquid outlet of the gas-liquid separator 130, and the other port is connected to the inlet of the second evaporator 120. During normal operation in cooling mode, the electronic expansion valve 140 is in the open state. The opening degree of the electronic expansion valve 140 can be a preset opening degree or the maximum opening degree, ensuring that the liquid refrigerant can flow smoothly into the second evaporator 120 for heat exchange.

[0080] It can be understood that when the cooling capacity of the second evaporator 120 is too large, the flow rate of liquid refrigerant can be reduced by decreasing the opening of the electronic expansion valve 140, thereby reducing the heat exchange of the second evaporator 120 and thus reducing the cooling capacity accordingly. This can effectively solve the problems of low outlet air temperature and condensation caused by excessive cooling capacity of the evaporator. This can achieve the regulation of outlet air temperature, making the outlet air temperature more uniform and helping to maintain the stability of indoor ambient temperature.

[0081] It should be noted that when the cooling capacity demand is relatively low, the opening of the electronic expansion valve 140 can be reduced to its minimum. This way, the liquid refrigerant does not pass through the second evaporator 120, or only a small amount passes through it. The refrigerant only passes through the first evaporator 110 for heat exchange. This can be understood as only half of the evaporator being operational. This can quickly reduce the cooling capacity, thereby increasing the outlet air temperature and effectively solving problems such as condensation caused by excessively low outlet air temperature. It is also worth noting that when the electronic expansion valve 140 is operating at its minimum opening, the refrigerant flows to the outdoor unit of the air conditioner in gaseous form along the outlet of the gas-liquid separator 130.

[0082] See Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of an indoor heat exchange component provided in another embodiment of the present invention. The regulating valve used in this embodiment is a solenoid valve 150. One port of the solenoid valve 150 is connected to the liquid outlet of the gas-liquid separator 130, and the other port of the solenoid valve 150 is connected to the inlet of the second evaporator 120. It can be understood that the solenoid valve 150 has an opening and closing function. During normal operation in cooling mode, the solenoid valve 150 is in the open state, allowing the liquid refrigerant to flow smoothly into the second evaporator 120 for heat exchange.

[0083] When the cooling capacity of the second evaporator 120 is too large, the liquid refrigerant can be prevented from entering the second evaporator 120 for heat exchange by closing the solenoid valve 150. In other words, when the solenoid valve 150 is closed, the refrigerant only passes through the first evaporator 110 for heat exchange, which can quickly reduce the cooling capacity and effectively solve the problems of low outlet air temperature and condensation caused by excessive cooling capacity of the evaporator. This achieves the regulation of the outlet air temperature and helps to maintain the stability of the indoor ambient temperature.

[0084] See Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of an indoor heat exchange component provided in another embodiment of the present invention. The regulating valve used in this embodiment is a four-way valve 160, which includes a first port, a second port, a third port, and a fourth port. The first port is connected to the liquid outlet, the second port is connected to the inlet of the second evaporator 120, the third port is connected to the gas outlet, and the fourth port is connected to the outlet of the second evaporator 120. During normal operation in cooling mode, the first and second ports of the four-way valve 160 are connected, as are the third and fourth ports. At this time, liquid refrigerant flows into the second evaporator 120 for heat exchange after passing through the first and second ports sequentially, while gaseous refrigerant flows to the outdoor unit of the air conditioner after passing through the third and fourth ports sequentially, allowing the liquid refrigerant to flow smoothly into the second evaporator 120 for heat exchange.

[0085] When the cooling capacity of the second evaporator 120 is too high, the refrigerant flow direction is switched via the four-way valve 160. At this time, the first port is connected to the fourth port, and the second port is connected to the third port. This allows the liquid refrigerant to flow directly to the outdoor unit of the air conditioner without passing through the second evaporator 120, while the gaseous refrigerant flows into the second evaporator 120. Since the gaseous refrigerant has only a small amount of sensible heat, its heat exchange within the second evaporator 120 is minimal, thereby reducing the cooling capacity of the second evaporator 120. This effectively solves the problems of excessively high evaporator cooling capacity, such as low outlet air temperature and condensation. This allows for the regulation of the outlet air temperature, which helps maintain a stable indoor ambient temperature.

[0086] This invention also provides an air conditioner, which includes the indoor heat exchange component described in the above embodiments, such as... Figure 1 The diagram shown illustrates the working principle of the air conditioner. Figure 1 The specific structure of the indoor heat exchange component is not shown in the diagram. For details, please refer to [link / reference needed]. Figure 2 , Figure 3 and Figure 4 The embodiments shown are not described in detail here.

[0087] Understandably, when the air conditioner is running in cooling mode, the refrigerant undergoes heat exchange in the first evaporator 110, and then, after separation in the gas-liquid separator 130, the liquid refrigerant enters the second evaporator 120 for further heat exchange. At this point, the heat exchange is high, resulting in high cooling efficiency and a rapid reduction in the outlet air temperature. Considering that excessive cooling can easily lead to excessively low outlet air temperature and condensation, a temperature sensor (not shown in the attached diagram) is installed on the air conditioner in this embodiment. This sensor monitors the indoor ambient temperature in real time, and the operating state of the regulating valve can be controlled based on the indoor ambient temperature to adjust the outlet air temperature. This effectively reduces the possibility of excessive heat exchange in the evaporator causing excessively low outlet air temperature and condensation, resulting in a more uniform indoor ambient temperature and improved user comfort.

[0088] Specifically, the air conditioner has a preset temperature. A temperature sensor detects the indoor ambient temperature and compares it to the set temperature to determine if the outlet air temperature is too low. When the indoor ambient temperature is lower than the set temperature, a regulating valve controls the flow of liquid refrigerant into the second evaporator 120 to reduce the heat exchange in the second evaporator 120, thereby increasing the outlet air temperature. This achieves the purpose of regulating the outlet air temperature, preventing excessive heat exchange in the second evaporator 120 that could lead to excessively low outlet air temperature and condensation, resulting in a more uniform indoor temperature and better user comfort.

[0089] For example, if the air conditioner is set to 20°C, when the indoor temperature is below 20°C, the control valve reduces the flow of liquid refrigerant, causing the outlet air temperature to rise, thereby gradually raising the indoor temperature to near 20°C, which helps to make the indoor temperature more uniform.

[0090] See Figure 2 As shown, in this embodiment, the regulating valve is an electronic expansion valve 140. When the air conditioner is in cooling mode, the indoor ambient temperature is detected by a temperature sensor. When the indoor ambient temperature is lower than the set temperature, the air conditioner controls the opening of the electronic expansion valve 140 to reduce the flow rate of liquid refrigerant flowing into the second evaporator 120, thereby reducing the heat exchange of the second evaporator 120 and increasing the outlet air temperature.

[0091] It should be noted that the opening degree of the electronic expansion valve 140 can be set according to the actual application scenario of the product. Of course, when the indoor ambient temperature is lower than the set temperature, the air conditioner can also control the electronic expansion valve 140 to operate at the minimum opening degree; while when the indoor ambient temperature is higher than the set temperature, the air conditioner controls the electronic expansion valve 140 to open to the set opening degree, so that the liquid refrigerant flows normally into the second evaporator 120 for heat exchange, thereby achieving the purpose of regulating the indoor ambient temperature.

[0092] See Figure 3As shown, in this embodiment, the regulating valve is a solenoid valve 150. When the air conditioner is in cooling mode, the indoor ambient temperature is detected by a temperature sensor. When the indoor ambient temperature is lower than the set temperature, the air conditioner controls the solenoid valve 150 to close, preventing the liquid refrigerant from passing through the second evaporator 120 for heat exchange, thereby reducing the heat exchange in the second evaporator 120 and increasing the outlet air temperature. When the indoor ambient temperature is higher than the set temperature, the air conditioner controls the solenoid valve 150 to reopen, allowing the liquid refrigerant to flow normally into the second evaporator 120 for heat exchange, thus regulating the indoor ambient temperature.

[0093] See Figure 4 As shown, in this embodiment, the regulating valve is a four-way valve 160. When the air conditioner is in cooling mode, the indoor ambient temperature is detected by a temperature sensor. When the indoor ambient temperature is lower than the set temperature, the air conditioner controls the four-way valve 160 to switch the flow direction of the liquid refrigerant, allowing the liquid refrigerant to bypass the second evaporator 120 and instead allowing the gaseous refrigerant to enter the second evaporator 120. This reduces the heat exchange in the second evaporator 120, thus increasing the outlet air temperature. It should be noted that when the indoor ambient temperature is higher than the set temperature, the air conditioner controls the four-way valve 160 to switch back to its original flow path, allowing the liquid refrigerant to flow into the second evaporator 120 for heat exchange, while preventing the gaseous refrigerant from passing through the second evaporator 120, thereby achieving the purpose of regulating the indoor ambient temperature.

[0094] refer to Figures 5 to 8 This invention describes a control method for an air conditioner according to an embodiment of the invention. This control method is applicable to the air conditioner described in the above embodiment. The structure of the air conditioner can be found in [reference needed]. Figures 1 to 4 The embodiments shown are not described in detail here. The control method is explained below with specific examples.

[0095] See Figure 5 As shown, the air conditioner control method of this embodiment includes, but is not limited to, the following steps:

[0096] Step S100: Turn on the air conditioner in cooling mode;

[0097] Step S200: Obtain the indoor ambient temperature;

[0098] Step S300: Control the operating state of the regulating valve according to the indoor ambient temperature to regulate the flow rate of liquid refrigerant flowing from the gas-liquid separator into the second evaporator.

[0099] It is understandable that this control method is designed to control the working state of the regulating valve when the air conditioner is in cooling mode. During the heating operation of the air conditioner, the gas-liquid separator 130 and the regulating valve do not work, and the refrigerant exchanges heat through the indoor heat exchanger 100, which does not affect the operation of the air conditioner. This will not be elaborated further here.

[0100] Specifically, when the unit is running in cooling mode, the refrigerant passes through the throttling device 500 to form a low-temperature, low-pressure refrigerant, which then enters the first evaporator 110. After heat exchange in the first evaporator 110, the refrigerant enters the gas-liquid separator 130. After separation in the gas-liquid separator 130, the liquid refrigerant enters the second evaporator 120 for heat exchange, while the gaseous refrigerant does not pass through the second evaporator 120. Since the liquid refrigerant has a large amount of latent heat, this can increase the heat exchange capacity of the second evaporator 120, making the cooling more rapid and quickly reducing the outlet air temperature, thereby rapidly cooling the indoor ambient temperature.

[0101] After the air conditioner has been running in cooling mode for a period of time, the liquid refrigerant continuously enters the second evaporator 120 for heat exchange, resulting in high cooling efficiency. However, the outlet air temperature can easily become too low, leading to uneven indoor ambient temperature and condensation, which negatively impacts the user experience. Therefore, in the control method of this embodiment, the indoor ambient temperature is acquired in real time using a temperature sensor to determine whether the indoor ambient temperature is too low. It is understood that a low outlet air temperature easily causes an excessively low indoor ambient temperature, and the indoor ambient temperature can be used to determine whether the outlet air temperature is too low.

[0102] For example, when the indoor ambient temperature is lower than the set temperature, the flow rate of liquid refrigerant can be reduced or closed by adjusting the valve, that is, the flow rate of liquid refrigerant entering the second evaporator 120 can be reduced, thereby reducing the cooling capacity of the second evaporator 120 and increasing the outlet air temperature. This effectively avoids the problem of condensation caused by excessively low outlet air temperature, and keeps the indoor ambient temperature within a comfortable range, making it more practical.

[0103] See Figure 2 , Figure 3 and Figure 4 As shown, the regulating valve can be an electronic expansion valve 140, a solenoid valve 150, or a four-way valve 160. The control method of the above embodiment can be adapted to the specific form of the regulating valve. The control method is described below with a specific example of the regulating valve.

[0104] In some embodiments, the regulating valve used is an electronic expansion valve 140, and the control method of the air conditioner in the embodiments includes, but is not limited to, the following steps:

[0105] Step S110: Turn on the air conditioner in cooling mode;

[0106] Step S210: Determine the difference between the indoor ambient temperature and the first set temperature;

[0107] Step S310: When the indoor ambient temperature is less than or equal to the first set temperature, control the electronic expansion valve to reduce its opening or operate at the minimum opening.

[0108] Understandably, seeFigure 2 In the illustrated embodiment, the flow rate of liquid refrigerant is controlled by adjusting the opening of the electronic expansion valve 140. When the cooling capacity of the second evaporator 120 is too large, the flow rate of liquid refrigerant can be reduced by controlling the opening of the electronic expansion valve 140, thereby reducing the heat exchange of the second evaporator 120 and consequently reducing the cooling capacity. This effectively solves the problems of low outlet air temperature and condensation caused by excessive cooling capacity of the evaporator, which is conducive to maintaining a stable indoor ambient temperature.

[0109] It should be noted that when the cooling capacity demand is small, the opening of the electronic expansion valve 140 can be reduced to the minimum opening, so that the liquid refrigerant does not pass through the second evaporator 120 or only a small amount passes through the second evaporator 120, and the refrigerant only passes through the first evaporator 110 for heat exchange. This can quickly reduce the cooling capacity, thereby increasing the outlet air temperature and effectively solving problems such as condensation caused by excessively low outlet air temperature.

[0110] It can be understood that increasing the opening degree of the electronic expansion valve 140 can increase the flow rate of liquid refrigerant. For example, when the indoor ambient temperature is higher than the first set temperature, the flow rate of liquid refrigerant entering the second evaporator 120 can be increased by controlling the opening degree of the electronic expansion valve 140, thereby increasing the cooling capacity and making the cooling more rapid. Specifically, the control method of the embodiment also includes:

[0111] Step S410: When the indoor ambient temperature is greater than the first set temperature, control the electronic expansion valve to increase its opening.

[0112] It should be noted that controlling the electronic expansion valve 140 to increase its opening degree can be done by increasing the opening degree of the electronic expansion valve 140 to a preset opening degree or to a maximum opening degree, so as to ensure that the liquid refrigerant can flow into the second evaporator 120 quickly, thereby improving the refrigeration efficiency.

[0113] After the electronic expansion valve 140 increases its opening, the liquid refrigerant flow increases, which can accelerate the reduction of the indoor ambient temperature to the first set temperature. Therefore, it is necessary to obtain the indoor ambient temperature and continue to determine whether the indoor ambient temperature is too low. Considering that the indoor ambient temperature tends to fluctuate around the first set temperature when it is close to it, leading to frequent control of the electronic expansion valve 140 to decrease and increase its opening, after controlling the electronic expansion valve 140 to increase its opening, the indoor ambient temperature is compared with the second set temperature. The second set temperature is greater than the first set temperature, and there is a difference between the second set temperature and the first set temperature. This reduces the fluctuation of the control process around the first set temperature, thereby reducing the stability of the air conditioner.

[0114] Specifically, the indoor ambient temperature is T1, the first set temperature is T2, and the second set temperature is T3. The second set temperature can be understood as T2 + ΔT, where ΔT is the difference between the first and second set temperatures. See also... Figure 6 As shown, the control method of the embodiment includes, but is not limited to, the following steps:

[0115] Step S510: Turn on the air conditioner in cooling mode;

[0116] Step S520: Determine whether the indoor ambient temperature T1 is less than or equal to the first set temperature T2;

[0117] Step S530: When T1≤T2, control the electronic expansion valve to reduce its opening or operate at its minimum opening.

[0118] Step S540: When T1 > T2, control the electronic expansion valve to increase its opening.

[0119] Step S550: After controlling the electronic expansion valve to increase its opening, determine whether the indoor ambient temperature T1 is less than or equal to the second set temperature T3; when T1≤T3, control the electronic expansion valve to decrease its opening or operate at the minimum opening.

[0120] It should be noted that when T1 ≤ T2, the electronic expansion valve 140 is controlled to reduce its opening or operate at its minimum opening. This reduces the amount of liquid refrigerant entering the second evaporator 120, causing the outlet air temperature to gradually increase, and consequently, the indoor ambient temperature. Step S520 is then repeated to further determine whether the indoor ambient temperature is less than or equal to the first set temperature. It can be understood that after controlling the electronic expansion valve 140 to increase its opening, if T1 > T3, the process of increasing the opening of the electronic expansion valve 140 continues until T1 ≤ T3. By executing steps S510 to S550, the outlet air temperature can be regulated, effectively solving problems such as excessively low outlet air temperature and condensation caused by excessive cooling capacity in air conditioners. This also helps maintain a stable indoor ambient temperature, resulting in better user comfort.

[0121] For example, the first set temperature of the air conditioner is 20℃, and the second set temperature is 22℃. When the indoor ambient temperature drops to 18℃, the electronic expansion valve 140 is controlled to reduce its opening to decrease the flow of liquid refrigerant, thereby increasing the outlet air temperature and gradually raising the indoor ambient temperature to close to 20℃. When the indoor ambient temperature is 24℃, the electronic expansion valve 140 is controlled to increase its opening to allow the indoor ambient temperature to drop rapidly. When the indoor ambient temperature reaches 22℃, the electronic expansion valve 140 is controlled to decrease its opening, thus maintaining the stability of the indoor ambient temperature.

[0122] In some embodiments, the regulating valve used is a solenoid valve 150, and the control method of the air conditioner in the embodiments includes, but is not limited to, the following steps:

[0123] Step S120: Turn on the air conditioner in cooling mode;

[0124] Step S220: Determine the difference between the indoor ambient temperature and the first set temperature;

[0125] Step S320: When the indoor ambient temperature is less than or equal to the first set temperature, control the solenoid valve to close.

[0126] Understandably, see Figure 3 In the embodiment shown, when the cooling capacity of the second evaporator 120 is too large, the flow rate of liquid refrigerant can be reduced by controlling the solenoid valve 150 to close, thereby reducing the heat exchange of the second evaporator 120 and consequently reducing the cooling capacity. This effectively solves the problems of low outlet air temperature and condensation caused by excessive cooling capacity of the evaporator, which is conducive to maintaining a stable indoor ambient temperature.

[0127] It should be noted that when the cooling capacity demand is low, the solenoid valve 150 can be closed, preventing the liquid refrigerant from passing through the second evaporator 120. The refrigerant only passes through the first evaporator 110 for heat exchange, thus quickly reducing the cooling capacity and increasing the outlet air temperature, effectively solving problems such as condensation caused by excessively low outlet air temperature. Conversely, when the cooling capacity demand increases, the solenoid valve 150 is opened, allowing the liquid refrigerant to pass through the second evaporator 120 for heat exchange, thereby increasing the cooling capacity. Specifically, the control method in this embodiment also includes:

[0128] Step S420: When the indoor ambient temperature is higher than the first set temperature, control the solenoid valve to open.

[0129] After the control solenoid valve 150 opens, the flow rate of liquid refrigerant entering the second evaporator 120 increases, which can accelerate the reduction of the indoor ambient temperature to the first set temperature. Therefore, it is necessary to obtain the indoor ambient temperature and continue to determine whether the indoor ambient temperature is too low. To avoid fluctuations in the control process around the first set temperature, after the control solenoid valve 150 opens, the indoor ambient temperature is compared with the second set temperature. For details, see [link to relevant documentation]. Figure 7 As shown, the control method of the embodiment includes, but is not limited to, the following steps:

[0130] Step S610: Turn on the air conditioner in cooling mode;

[0131] Step S620: Determine whether the indoor ambient temperature T1 is less than or equal to the first set temperature T2;

[0132] Step S630: When T1≤T2, control the solenoid valve to close;

[0133] Step S640: When T1 > T2, control the solenoid valve to open;

[0134] Step S650: After the solenoid valve is opened, determine whether the indoor ambient temperature T1 is less than or equal to the second set temperature T3; if T1≤T3, close the solenoid valve.

[0135] It should be noted that when T1 ≤ T2, the control solenoid valve 150 is closed, reducing the amount of liquid refrigerant entering the second evaporator 120, causing the outlet air temperature to gradually increase, and the indoor ambient temperature to rise accordingly. Then, step S620 is repeated to continue determining whether the indoor ambient temperature is less than or equal to the first set temperature. It can be understood that after the control solenoid valve 150 is opened, if it is determined that T1 > T3, the control solenoid valve 150 remains open until T1 ≤ T3 is satisfied. By executing the above steps S610 to S650, the outlet air temperature can be regulated, effectively solving problems such as excessively low outlet air temperature and condensation caused by excessive cooling capacity of the air conditioner, and helping to maintain a stable indoor ambient temperature, resulting in better user comfort.

[0136] In some embodiments, the regulating valve used is a four-way valve 160, and the control method of the air conditioner in the embodiments includes, but is not limited to, the following steps:

[0137] Step S130: Turn on the air conditioner in cooling mode;

[0138] Step S230: Determine the difference between the indoor ambient temperature and the first set temperature;

[0139] Step S330: When the indoor ambient temperature is less than or equal to the first set temperature, control the four-way valve to switch to gaseous refrigerant flow to the second evaporator.

[0140] Understandably, see Figure 4 In the illustrated embodiment, when the cooling capacity demand is low, the flow direction of the refrigerant is switched by controlling the four-way valve 160, allowing the liquid refrigerant to bypass the second evaporator 120 and instead allowing the gaseous refrigerant to flow into the second evaporator 120. This reduces the heat exchange capacity of the second evaporator 120, thereby reducing the cooling capacity accordingly. This effectively solves the problems of excessively low outlet air temperature and condensation that can easily occur when the evaporator's cooling capacity is too high, which is beneficial for maintaining a stable indoor ambient temperature. Conversely, when the cooling capacity demand increases, the four-way valve 160 is controlled to allow the liquid refrigerant to pass through the second evaporator 120 for heat exchange, while the gaseous refrigerant bypasses the second evaporator 120, thereby increasing the cooling capacity. Specifically, the control method of the embodiment further includes:

[0141] Step S430: When the indoor ambient temperature is greater than the first set temperature, control the four-way valve to switch to liquid refrigerant flow to the second evaporator 120.

[0142] After the four-way valve 160 switches to allow liquid refrigerant to flow to the second evaporator 120, the flow rate of liquid refrigerant entering the second evaporator 120 increases, which can accelerate the reduction of the indoor ambient temperature to the first set temperature. Therefore, it is necessary to obtain the indoor ambient temperature and continue to determine whether the indoor ambient temperature is too low. To avoid fluctuations in the control process around the first set temperature, the indoor ambient temperature is compared with the second set temperature. For details, see [link to relevant documentation]. Figure 8 As shown, the control method of the embodiment includes, but is not limited to, the following steps:

[0143] Step S710: Turn on the air conditioner in cooling mode;

[0144] Step S720: Determine whether the indoor ambient temperature T1 is less than or equal to the first set temperature T2;

[0145] Step S730: When T1≤T2, control the four-way valve to switch to gaseous refrigerant flow to the second evaporator;

[0146] Step S740: When T1 > T2, control the four-way valve to switch to liquid refrigerant flow to the second evaporator;

[0147] In step S750, after controlling the four-way valve to switch to liquid refrigerant flow to the second evaporator, it is determined whether the indoor ambient temperature T1 is less than or equal to the second set temperature T3; when T1≤T3, the four-way valve is controlled to switch to gaseous refrigerant flow to the second evaporator.

[0148] It should be noted that when T1 ≤ T2, the four-way valve 160 switches to gaseous refrigerant flow to the second evaporator 120. The heat exchange capacity of the second evaporator 120 decreases, and the outlet air temperature gradually increases, consequently raising the indoor ambient temperature. Then, step S720 is repeated to continue determining whether the indoor ambient temperature is less than or equal to the first set temperature. It can be understood that after switching the four-way valve 160 to liquid refrigerant flow to the second evaporator 120, if T1 > T3, the four-way valve 160 remains in its current state until T1 ≤ T3. By executing steps S710 to S750, the outlet air temperature can be adjusted, effectively solving problems such as excessively low outlet air temperature and condensation caused by excessive cooling capacity in air conditioners. This also helps maintain a stable indoor ambient temperature, resulting in better user comfort.

[0149] In addition, embodiments of the present invention also provide a control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor and the memory can be connected via a bus or other means.

[0150] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0151] The non-transient software program and instructions required to implement the air conditioner control method of the above embodiments are stored in memory. When executed by a processor, the air conditioner control method of the above embodiments is executed, for example, the method described above. Figure 5 Method steps S100 to S300 in the text Figure 6 Method steps S510 to S550 Figure 7 Method steps S610 to S650 Figure 8 Method steps S710 to S750.

[0152] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0153] Furthermore, embodiments of the present invention also provide an air conditioner, including the control device as described in the above embodiments. Since the air conditioner employs all the technical solutions of the control device described in the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0154] Furthermore, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions that are executed by a processor or controller, for example, by a processor in the above-described air conditioner embodiment, causing the processor to execute the control method of the air conditioner in the above-described embodiment, for example, performing the above-described control method. Figure 5 Method steps S100 to S300 in the text Figure 6 Method steps S510 to S550 Figure 7 Method steps S610 to S650 Figure 8 Method steps S710 to S750.

[0155] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0156] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes a compressor, an outdoor heat exchanger, and an indoor heat exchange assembly. The indoor heat exchange assembly includes a first evaporator, a second evaporator, a gas-liquid separator, and a regulating valve. The inlet of the gas-liquid separator is connected to the outlet of the first evaporator, the liquid outlet of the gas-liquid separator is connected to the inlet of the second evaporator, the gas outlet of the gas-liquid separator and the outlet of the second evaporator are both connected to the inlet of the compressor, the inlet of the first evaporator is connected to one port of the outdoor heat exchanger, the outlet of the compressor is connected to the other port of the outdoor heat exchanger, and the regulating valve is connected between the second evaporator and the gas-liquid separator. The control method includes: Obtain indoor ambient temperature; When the air conditioner is in cooling mode, the working state of the regulating valve is controlled according to the indoor ambient temperature to regulate the flow rate of liquid refrigerant flowing from the gas-liquid separator into the second evaporator; The regulating valve is a four-way valve, which includes a first port, a second port, a third port and a fourth port. The first port is connected to the liquid outlet of the gas-liquid separator, the second port is connected to the inlet of the second evaporator, the third port is connected to the gas outlet of the gas-liquid separator, and the fourth port is connected to the outlet of the second evaporator. The step of controlling the operating state of the regulating valve according to the indoor ambient temperature includes: When the indoor ambient temperature is greater than the first set temperature, the four-way valve is controlled to switch to a state where the liquid outlet of the gas-liquid separator is connected to the inlet of the second evaporator. After the control valve is switched to the state where the outlet of the gas-liquid separator is connected to the inlet of the second evaporator, it is determined that the indoor ambient temperature is greater than the second set temperature. When the indoor ambient temperature is less than or equal to the second set temperature, the control of the four-way valve is executed to switch the state in which the outlet of the gas-liquid separator is connected to the inlet of the second evaporator. When the indoor ambient temperature is greater than the second set temperature, the four-way valve continues to be controlled to maintain the current state until the indoor ambient temperature is less than or equal to the second set temperature.

2. The control method according to claim 1, characterized in that, The method of controlling the operating state of the regulating valve according to the indoor ambient temperature further includes: When the indoor ambient temperature is less than or equal to the first set temperature, the four-way valve is controlled to switch to a state where the outlet of the gas-liquid separator is connected to the inlet of the second evaporator.

3. A control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the control method as described in claim 1 or 2.

4. A computer-readable storage medium storing computer-executable instructions, characterized in that, The computer-executable instructions are used to execute the control method as described in claim 1 or 2.

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