Control method, medium, device and air conditioner for T3 working condition air conditioner

Abstract

The present invention relates to the field of air-conditioning technology, and in particular to a control method, medium, device and air conditioner for a T3 working condition air conditioner. The present application aims to solve the problem of attenuation of refrigeration capacity due to an increase in the compression ratio of the compressor in a high-temperature environment in air-conditioning areas with T3 climate types. To this end, the T3 working condition air conditioner of the present application includes a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger connected in sequence through a refrigerant pipe. The compressor is a variable capacity compressor, and the variable capacity compressor has two compression cylinders. The control method includes: obtaining the exhaust temperature of the variable capacity compressor during refrigeration operation; judging the difference between the exhaust temperature and a preset temperature threshold; determining the working mode of the variable capacity compressor based on the judgment result; and controlling the operation of the variable capacity compressor based on the working mode. The present application can keep the compressor in the high-efficiency frequency range, reduce the risk of leakage, avoid attenuation of refrigeration capacity, and ensure the refrigeration effect.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method, medium, device and air conditioner for a T3 operating mode air conditioner. Background Art

[0002] There are many types of air conditioners, and their applicable ambient temperature ranges vary depending on the climate. According to the national standard GB / T7725-1996, "Room Air Conditioners," there are three climate types: T1, T2, and T3. T3 climate type air conditioners have a maximum operating temperature of 52°C and are suitable for tropical climates, hence the name "tropical air conditioner."

[0003] For regions with T3 climate type, such as the Middle East, although there are corresponding T3 type air conditioners, the high temperature environment in summer will cause the compression ratio of the compressor to increase. The increase in compression ratio will increase the risk of refrigerant leakage, seriously reduce the cooling capacity, and seriously affect the cooling effect.

[0004] Accordingly, this field requires a new technical solution to solve the above problems. Summary of the Invention

[0005] In order to solve at least one of the above-mentioned problems in the prior art, namely, to solve the problem that the compression ratio of the compressor increases in a high-temperature environment in an air conditioner in a T3 climate type area, resulting in a decrease in cooling capacity, the first aspect of the present application provides a control method for a T3 working condition air conditioner, wherein the T3 working condition air conditioner includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger connected in sequence via a refrigerant pipe, the compressor being a variable capacity compressor having two compression cylinders, and the control method includes:

[0006] During refrigeration operation, obtaining the exhaust temperature of the variable capacity compressor;

[0007] Determining the difference between the exhaust temperature and a preset temperature threshold;

[0008] Based on the judgment result, determining the operating mode of the variable capacity compressor;

[0009] Based on the working mode, controlling the variable capacity compressor to operate;

[0010] Among them, the working modes of the variable capacity compressor include a dual-cylinder mode and a two-stage mode. In the dual-cylinder mode, the two compression cylinders of the variable capacity compressor compress the refrigerant separately. In the two-stage mode, the two compression cylinders of the variable capacity compressor compress the refrigerant successively.

[0011] The technical solution of the present application controls the working mode of the variable-capacity compressor based on the comparison result between the exhaust temperature and the preset temperature threshold, so that the compressor can change the working mode under different environments to control the displacement and compression ratio of the compressor, so that the compressor is always in the high-efficiency frequency range, reducing the risk of leakage, avoiding the attenuation of refrigeration capacity, and ensuring the refrigeration effect.

[0012] In the preferred technical solution of the control method for the T3 working mode air conditioner, the step of "determining the operating mode of the variable capacity compressor based on the judgment result" further includes:

[0013] When the exhaust temperature is lower than the preset temperature threshold, the operating mode of the variable capacity compressor is determined to be the two-stage mode.

[0014] In the preferred technical solution of the control method for the T3 working mode air conditioner, the step of "determining the operating mode of the variable capacity compressor based on the judgment result" further includes:

[0015] When the exhaust temperature is greater than or equal to the preset temperature threshold, it is determined that the operating mode of the variable capacity compressor is the two-cylinder mode.

[0016] In the preferred technical solution of the control method of the T3 working mode air conditioner, the control method further includes:

[0017] When switching from the two-stage mode to the two-cylinder mode, determining a current operating frequency of the variable capacity compressor in the two-cylinder mode based on a previous operating frequency of the variable capacity compressor in the two-stage mode before switching;

[0018] The variable capacity compressor is controlled to operate at the current operating frequency.

[0019] By determining the current operating frequency in the dual-cylinder mode based on the previous operating frequency of the variable capacity compressor before switching, it is possible to ensure that the indoor cooling effect is not attenuated and the cooling capacity of the indoor unit is maintained.

[0020] In the preferred technical solution of the control method for the T3 working mode air conditioner, the step of "determining the current operating frequency of the variable capacity compressor in the two-cylinder mode based on the previous operating frequency of the variable capacity compressor in the two-stage mode before switching" further includes:

[0021] The current operating frequency is calculated using the following formula:

[0022] f2=V1×f1 / (V1+V2)

[0023] Wherein, f2 is the current operating frequency, f1 is the previous operating frequency, V1 and V2 are the volumes of the two compression cylinders of the variable capacity compressor respectively.

[0024] In the preferred technical solution of the control method of the above-mentioned T3 working condition air conditioner, a water receiving pan is provided under the indoor heat exchanger, the water receiving pan is connected to the outside through a drain pipe, a radiator is provided on the drain pipe, and the radiator is used to exchange heat with the compressor.

[0025] By setting up a water tray and a radiator, the condensed water generated by the indoor unit can be used to cool the outdoor compressor casing, lowering the compressor surface temperature, thereby reducing the compressor power and improving the system's energy efficiency.

[0026] In the preferred technical solution of the control method of the T3 working condition air conditioner, the radiator is a copper tube radiator, and the radiator is equipped with a heat dissipation fan; or

[0027] The radiator is a coil, and the coil is arranged on the shell of the compressor.

[0028] In a second aspect of the present application, a computer-readable storage medium is provided, which stores a plurality of program codes, wherein the program codes are suitable for being loaded and run by a processor to execute the control method of the T3 operating condition air conditioner according to any one of the first aspects.

[0029] In a third aspect of the present application, a control device is provided, comprising:

[0030] processor;

[0031] A memory, wherein the memory is suitable for storing a plurality of program codes, wherein the program codes are suitable for being loaded and run by the processor to execute the control method of the T3 working condition air conditioner according to any one of the first aspects.

[0032] In a fourth aspect of the present application, a T3 operating mode air conditioner is provided, wherein the T3 operating mode air conditioner includes the control device described in the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present application is described below with reference to the accompanying drawings.

[0034] Figure 1 This is the system diagram of the T3 working condition air conditioner of this application (two-cylinder mode);

[0035] Figure 2 This is the system diagram of the T3 working condition air conditioner of this application (two-stage mode);

[0036] Figure 3 This is a flow chart of the control method of the T3 working condition air conditioner of the present application;

[0037] Figure 4 This is a logic diagram of a possible implementation method of the control method of the T3 working mode air conditioner of the present application.

[0038] Reference Signs List

[0039] 1. Compressor; 11. First compression cylinder; 12. Second compression cylinder; 13. First port; 14. Second port; 15. Third port; 16. Fourth port; 17. Exhaust port; 2. Indoor heat exchanger; 31. First throttling device; 32. Second throttling device; 4. Outdoor heat exchanger; 5. Drain pan; 6. Drain pipe; 71. First four-way valve; 72. Second four-way valve; 8. Gas-liquid separator; 9. Radiator. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. For example, although the various steps are described in a sequential order in the following embodiments, it will be understood by those skilled in the art that in order to achieve the effect of the present embodiment, the different steps do not have to be performed in such an order, and they can be performed simultaneously (in parallel) or in a reversed order, and these simple changes are all within the scope of protection of the present application.

[0041] It should be noted that in the embodiments of the present application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, the term "plurality" described in the embodiments of the present application refers to two or more.

[0042] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] First refer to Figure 1 and Figure 2 , describes the T3 working condition air conditioner of this application.

[0044] like Figure 1 and Figure 2As shown, the air conditioner of the present application includes a compressor 1, an outdoor heat exchanger 4, a throttling device, and an indoor heat exchanger 2 connected by a refrigerant pipeline. The exhaust port 17 of the compressor 1 is connected to the inlet of the outdoor heat exchanger 4 through a second four-way valve 72. The outlet of the outdoor heat exchanger 4 is connected to the inlet of the throttling device. The outlet of the throttling device is connected to the inlet of the indoor heat exchanger 2. The outlet of the indoor heat exchanger 2 is connected to the intake port of the compressor 1 through the second four-way valve 72.

[0045] The air conditioner also includes a water pan 5, a drain pipe 6, and a radiator 9. The water pan 5 is located below the indoor heat exchanger 2 and is used to receive condensed water generated during the operation of the indoor heat exchanger 2. The water pan 5 is connected to the outside through the drain pipe 6. The radiator 9 is located on the drain pipe 6 and is used to exchange heat with the compressor 1. Preferably, the radiator 9 is a copper tube radiator 9, which is fixed near the compressor 1 and is equipped with a cooling fan. When the cooling fan is started, it drives air flow to enable heat exchange between the compressor 1 and the condensed water inside the radiator 9.

[0046] By providing the water receiving pan 5 and the radiator 9, the condensed water generated by the indoor unit can be used to cool the housing of the outdoor compressor 1, thereby reducing the surface temperature of the compressor 1, thereby reducing the power of the compressor 1 and improving the energy efficiency level of the system.

[0047] Preferably, the compressor 1 is a variable capacity compressor 1 having two compression cylinders. Specifically, a first compression cylinder 11 and a second compression cylinder 12 are provided inside the variable capacity compressor 1. Four ports and an exhaust port 17 are provided on the housing of the compressor 1. The first port 13 is connected to the air inlet of the first compression cylinder 11, the second port 14 is connected to the air outlet of the first compression cylinder 11, the third port 15 is connected to the air inlet of the second compression cylinder 12, the air outlet of the second compression cylinder 12 is connected to the exhaust port 17, and the fourth port 16 is connected to the exhaust port 17 through the interior of the housing.

[0048] The variable capacity compressor 1 is further equipped with a first four-way valve 71 having four ports a, b, c, and d. The first port a is connected to the fourth port 16, the second port b is connected to the second port 14, and the third port c is connected to the third port 15. A moving part is provided inside the four-way valve. When the four-way valve is powered on or off, the moving part moves within the four-way valve to connect or block the different ports.

[0049] The interface connecting the second four-way valve 72 to the suction port of the compressor 1 is divided into two refrigerant pipelines via a flow divider. The two refrigerant pipelines are respectively connected to the inlets of the two gas-liquid separators 8, and the outlets of the two gas-liquid separators 8 are respectively connected to the two compression cylinders of the variable capacity compressor 1. The outlet of one gas-liquid separator 8 is directly connected to the first port 13, while the outlet of the other gas-liquid separator 8 is indirectly connected to the third port 15 via the fourth interface d of the first four-way valve 71.

[0050] Under the above configuration, the working modes of the variable capacity compressor 1 include a dual-cylinder mode and a dual-stage mode. Figure 1 When the first four-way valve 71 is de-energized, the system operates in dual-cylinder mode. In this mode, the two compression cylinders of the variable capacity compressor 1 independently compress the refrigerant. Specifically, a portion of the refrigerant passes through one of the gas-liquid separators 8 and enters the first compression cylinder 11 from the first port 13. After being compressed by the first compression cylinder 11, it is discharged from the second port 14. The refrigerant then passes through the second port b and the first port a of the first four-way valve 71, enters the housing, and is ultimately discharged from the exhaust port 17. Another portion of the refrigerant passes through the other gas-liquid separator 8, passes through the fourth port d and the third port c of the first four-way valve 71, and enters the second compression cylinder 12 from the third port 15. After being compressed by the second compression cylinder 12, it is discharged from the exhaust port 17.

[0051] See also Figure 2 When the first four-way valve 71 is powered on, it is in two-stage mode. In this mode, the two compression cylinders of the variable capacity compressor 1 compress the refrigerant in sequence. Specifically, the first port a and the fourth port d of the first four-way valve 71 are separated by a moving part. After passing through the gas-liquid separator 8, the refrigerant enters the first compression cylinder 11 through the first port 13. After being compressed by the first compression cylinder 11, it is discharged from the second port 14. Then, after passing through the second port b and the third port c of the first four-way valve 71, it enters the second compression cylinder 12 through the third port 15. After secondary compression in the second compression cylinder 12, it is discharged from the exhaust port 17.

[0052] Those skilled in the art will appreciate that the above-described configuration of the air conditioner is merely a preferred embodiment. Without departing from the principles of this application, those skilled in the art may adjust the structure of the above-described air conditioner to adapt the application to more specific application scenarios. For example, the switching between the dual-cylinder mode and the bipolar mode of the variable displacement compressor 1 can be achieved not through the first four-way valve 71, but by providing multiple valve groups and controlling the opening and closing of each valve within the valve group. Furthermore, the specific structure of the variable displacement compressor 1 is not fixed. As long as the switching between the dual-cylinder mode and the bipolar mode can be achieved, those skilled in the art may adjust the structure of the variable displacement compressor 1, such as by changing the number, position, and connection relationship of the ports. Furthermore, the second four-way valve 72 may not be provided. Furthermore, the radiator 9 may also have other structural forms, as long as it can exchange heat with the compressor 1. For example, the radiator 9 may also be a coil mounted on the outer casing of the compressor 1. Furthermore, the provision of the radiator 9 is not mandatory, and those skilled in the art may choose whether to provide the radiator 9 based on the specific application scenario.

[0053] Refer to the following Figure 3 , the control method of this application is introduced.

[0054] like Figure 3 As shown, in order to solve the problem of cooling capacity attenuation caused by the increased compression ratio of the compressor in the high temperature environment of the air conditioner in the T3 climate type area, the control method of the present application includes:

[0055] S101, during cooling operation, obtaining the exhaust temperature of the variable capacity compressor. For example, the exhaust temperature of the variable capacity compressor is obtained by a temperature sensor disposed at the exhaust port of the compressor.

[0056] S103: Determine the difference between the exhaust temperature and a preset temperature threshold. For example, the preset temperature threshold is the upper limit of the compressor's exhaust temperature. This threshold can be determined using a comparison table between ambient temperature and the preset temperature threshold, or based on a fitting formula between the ambient temperature and the preset temperature threshold. After determining the preset temperature threshold, the difference between the exhaust temperature and the preset temperature threshold is calculated by calculating the difference or ratio between the two.

[0057] S105: Determine the operating mode of the variable capacity compressor based on the judgment result. For example, the operating modes of a variable capacity compressor include a dual-cylinder mode and a dual-stage mode. In the dual-cylinder mode, the two compression cylinders of the variable capacity compressor independently compress the refrigerant. In the dual-stage mode, the two compression cylinders of the variable capacity compressor compress the refrigerant sequentially. The operating mode of the variable capacity compressor is determined based on the judgment result to ensure that the cooling capacity of the variable capacity compressor matches the environment.

[0058] S107: Based on the working mode, control the variable capacity compressor to operate. For example, after the working mode of the compressor is determined, control the compressor to operate in the selected mode.

[0059] The technical solution of the present application controls the working mode of the variable-capacity compressor based on the comparison result between the exhaust temperature and the preset temperature threshold, so that the compressor can change the working mode under different environments to control the displacement and compression ratio of the compressor, so that the compressor is always in the high-efficiency frequency range, reducing the risk of leakage, avoiding the attenuation of refrigeration capacity, and ensuring the refrigeration effect.

[0060] The preferred implementation of this application is introduced below.

[0061] In one embodiment, the step of "determining the operating mode of the variable displacement compressor based on the determination result" further includes: determining the operating mode of the variable displacement compressor to be a two-stage mode when the exhaust temperature is less than a preset temperature threshold; and determining the operating mode of the variable displacement compressor to be a two-cylinder mode when the exhaust temperature is greater than or equal to the preset temperature threshold.

[0062] Specifically, when the exhaust temperature is lower than the preset temperature threshold, the exhaust temperature of the compressor is not high and the indoor load is not large. At this time, controlling the compressor to operate in a two-stage mode can achieve a greater compression ratio at a lower operating frequency, thereby meeting the evaporation temperature requirement and ensuring the refrigeration effect and refrigeration efficiency of the air conditioner. When the exhaust temperature is greater than the preset temperature threshold, it proves that the exhaust temperature of the compressor is too high. At this time, the compression ratio of the compressor is relatively large, the operating frequency of the compressor is too high, there is a risk of refrigerant leakage, and the refrigeration capacity and effect are affected. The present application switches the compressor working mode to a two-cylinder mode, which has a lower frequency at the same exhaust volume. In this way, the high pressure of the air-conditioning system becomes lower and the low pressure becomes higher, the compression ratio of the compressor decreases, and the exhaust temperature of the outdoor heat exchanger will decrease, thereby ensuring the operating efficiency and refrigeration effect.

[0063] In one embodiment, the control method further includes: when switching from the two-cylinder mode to the two-stage mode, determining the current operating frequency of the variable capacity compressor in the two-cylinder mode based on the previous operating frequency of the variable capacity compressor in the two-stage mode before the switching; and controlling the variable capacity compressor to operate at the current operating frequency. Specifically, the step of "determining the current operating frequency of the variable capacity compressor in the two-cylinder mode based on the previous operating frequency of the variable capacity compressor in the two-stage mode before the switching" further includes: calculating the current operating frequency using the following formula:

[0064] f2=V1×f1 / (V1+V2) (1)

[0065] In formula (1), f2 is the current operating frequency, f1 is the previous operating frequency, and V1 and V2 are the volumes of the two compression cylinders of the variable-capacity compressor. This formula shows that by calculating the exhaust volume in two-stage mode and, from this, the operating frequency of the compressor in two-cylinder mode, the indoor cooling effect can be maintained, ensuring that the cooling capacity of the indoor unit is maintained.

[0066] Of course, the above control method is only a preferred implementation mode, and those skilled in the art may use other methods to determine the frequency of the compressor in the defrost mode, such as a comparison table, an empirical formula, etc.

[0067] In one embodiment, a water pan is located below the indoor heat exchanger, connected to the outside via a drain pipe. A radiator is located on the drain pipe and is used to exchange heat with the compressor. Specifically, during air conditioner operation, condensed water is generated in the indoor heat exchanger. This condensed water is then drained through the water pan and drain pipe to the radiator, where its temperature drops. This condensed water then exchanges heat with the compressor, cooling it and maintaining high energy efficiency.

[0068] By setting up a water tray and a radiator, the condensed water generated by the indoor unit can be used to cool the outdoor compressor casing, lowering the compressor surface temperature, thereby reducing the compressor power and improving the system's energy efficiency.

[0069] Of course, the provision of a radiator is not mandatory, and those skilled in the art can choose whether to provide a radiator based on specific application scenarios.

[0070] The following combination Figure 4 , a possible operating process of the air conditioner of this application is briefly described.

[0071] like Figure 4 As shown, in one possible operation process:

[0072] S201, obtain the exhaust temperature Ts of the compressor, and then execute S202.

[0073] S202, determine whether Ts ≥ Tmax is established. If so, execute S203; otherwise, execute S204.

[0074] S203 , controlling the compressor to operate in a dual-cylinder mode, and determining the operating frequency based on f2 = V1 × f1 / (V1 + V2).

[0075] S204, controlling the compressor to operate in a two-stage mode.

[0076] It should be noted that although the detailed steps of the method of the present application are described in detail above, without departing from the basic principles of the present application, technical personnel in this field can combine, split and change the order of the above steps. The modified technical solution does not change the basic concept of the present application and therefore falls within the scope of protection of the present application.

[0077] The present invention also provides a computer-readable storage medium. In one embodiment of a computer-readable storage medium according to the present invention, the computer-readable storage medium can be configured to store a method for controlling a T3 operating condition air conditioner that executes the above-mentioned method embodiment. The program can be loaded and run by a processor to implement the above-mentioned method for controlling a T3 operating condition air conditioner. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer-readable storage medium can be a storage device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present invention is a non-temporary computer-readable storage medium.

[0078] The present invention also provides a battery exchange control device. In an embodiment of a battery exchange control device according to the present invention, the battery exchange control device includes a processor and a memory. The memory can be configured to store a program for executing the control method of the T3 working condition air conditioner of the above-mentioned method embodiment, and the processor can be configured to execute the program in the memory, which includes but is not limited to the program for executing the control method of the T3 working condition air conditioner of the above-mentioned method embodiment. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer device can be a device device formed by various electronic devices.

[0079] This application also provides a T3 operating mode air conditioner, which includes the aforementioned control device. By providing the control device within the T3 operating mode air conditioner, the operating mode of the compressor can be controlled based on the exhaust gas temperature, thereby maintaining the compressor in a high-efficiency operating range, reducing the risk of leakage, preventing reduced cooling capacity, and ensuring effective operation.

[0080] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims of this application, any of the claimed embodiments may be used in any combination.

[0081] It should be noted that although the detailed steps of the method of the present application are described in detail above, without departing from the basic principles of the present application, technical personnel in this field can combine, split and change the order of the above steps. The modified technical solution does not change the basic concept of the present application and therefore falls within the scope of protection of the present application.

[0082] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A control method for a T3 operating mode air conditioner, wherein the T3 operating mode air conditioner comprises a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger connected in sequence via a refrigerant pipe, characterized in that: The compressor is a variable capacity compressor having two compression cylinders, and the control method includes: During refrigeration operation, obtaining the exhaust temperature of the variable capacity compressor; Determining the difference between the exhaust temperature and a preset temperature threshold; Based on the judgment result, determining the operating mode of the variable capacity compressor; Based on the working mode, controlling the variable capacity compressor to operate; The variable capacity compressor has two operating modes: a dual-cylinder mode and a dual-stage mode. In the dual-cylinder mode, the two compression cylinders of the variable capacity compressor compress the refrigerant separately. In the dual-stage mode, the two compression cylinders of the variable capacity compressor compress the refrigerant successively. The step of “determining the operating mode of the variable capacity compressor based on the judgment result” further includes: When the exhaust temperature is lower than the preset temperature threshold, determining that the operating mode of the variable capacity compressor is the two-stage mode; When the exhaust temperature is greater than or equal to the preset temperature threshold, it is determined that the operating mode of the variable capacity compressor is the two-cylinder mode.

2. The control method of the T3 working mode air conditioner according to claim 1, characterized in that: The control method further includes: When switching from the two-stage mode to the two-cylinder mode, determining a current operating frequency of the variable capacity compressor in the two-cylinder mode based on a previous operating frequency of the variable capacity compressor in the two-stage mode before switching; The variable capacity compressor is controlled to operate at the current operating frequency.

3. The control method of the T3 operating mode air conditioner according to claim 2, characterized in that: The step of “determining the current operating frequency of the variable capacity compressor in the two-cylinder mode based on the previous operating frequency of the variable capacity compressor in the two-stage mode before switching” further includes: The current operating frequency is calculated using the following formula: f2=V1×f1 / (V1+V2) Wherein, f2 is the current operating frequency, f1 is the previous operating frequency, V1 and V2 are the volumes of the two compression cylinders of the variable capacity compressor respectively.

4. The control method for a T3 operating mode air conditioner according to any one of claims 1 to 3, characterized in that: A water receiving pan is provided below the indoor heat exchanger, and the water receiving pan is communicated with the outside through a drainage pipe. A radiator is provided on the drainage pipe, and the radiator is used to exchange heat with the compressor.

5. The control method of the T3 working mode air conditioner according to claim 4, characterized in that: The radiator is a copper tube radiator, and the radiator is equipped with a cooling fan; or The radiator is a coil, and the coil is arranged on the shell of the compressor.

6. A computer-readable storage medium storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by a processor to execute the control method of the T3 working mode air conditioner according to any one of claims 1 to 5.

7. A control device, characterized in that: The control device comprises: processor; A memory, wherein the memory is suitable for storing a plurality of program codes, wherein the program codes are suitable for being loaded and run by the processor to execute the control method of the T3 working condition air conditioner according to any one of claims 1 to 5.

8. A T3 working mode air conditioner, characterized in that: The T3 operating mode air conditioner includes the control device according to claim 7.

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