WO2022062209A1 - Air conditioner, control method and computer-readable storage medium - Google Patents

Abstract

Proposed by the present application are an air conditioner, a control method and a computer-readable storage medium. The air conditioner comprises: a refrigerant switching device, an indoor heat exchanger, an outdoor heat exchanger, a compressor, a memory, and a processor. The refrigerant switching device comprises a liquid pipe, a gas pipe, and a valve assembly. The processor executes a computer program so as to execute the following: obtaining switching information of a working mode of the air conditioner; and controlling the valve assembly according to the switching information so that the gas pipe and the liquid pipe are closed according to the sequence of the gas pipe first and then the liquid pipe, and then opened according to the sequence of the gas pipe first and then the liquid pipe. Therefore, during the switching process of the working mode, the refrigerant inside an indoor unit heat exchanger is limited by means of first closing the gas pipe and the liquid pipe, which reduces the amount of refrigerant to be balanced after the gas pipe connected to a target working mode is connected, and reduces the refrigerant noise caused by the impact of high pressure and low pressure refrigerant during the connection process. At the same time, the refrigerant flow may be switched without limiting the refrigerant flow, which greatly shortens the duration of the switching process and ensures the operation stability of the compressor.

Description

Air conditioner, control method, and computer-readable storage medium

This application claims the priority of the Chinese patent application with the application number "202010998871.2" and the invention title "air conditioner, control method and computer-readable storage medium" filed with the State Intellectual Property Office of China on September 22, 2020, all of which are The contents are incorporated herein by reference.

technical field

The present application relates to the technical field of air conditioners, and in particular, to an air conditioner, a control method for an air conditioner, and a computer-readable storage medium.

Background technique

In the three-pipe heat recovery multi-line system, the refrigerant flow direction needs to be changed when the indoor unit conversion mode is performed. When the refrigerant flow direction changes, the indoor unit air pipe is often switched between the high-pressure air pipe and the low-pressure air pipe, so that the refrigerant in one state is changed. It is connected to the indoor unit to form a passage with the liquid pipe refrigerant. However, due to the large difference in refrigerant pressure between the high-pressure air pipe and the low-pressure air pipe, when switching to another pipe, the refrigerant in the indoor unit and the refrigerant in the pipe after switching will directly connect the high-pressure and low-pressure refrigerants. Makes noticeable noise when switching.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the prior art or related technologies.

To this end, the first aspect of the present application is to propose an air conditioner.

A second aspect of the present application is to provide a control method of an air conditioner.

A third aspect of the present application is to propose a computer-readable storage medium.

In view of this, according to the first aspect of the present application, an air conditioner is proposed, including: a refrigerant switching device, including a liquid pipe, an air pipe and a valve assembly, the valve assembly is disposed on the liquid pipe and the air pipe, and the valve assembly is configured to open the liquid pipe. Pipe and gas pipe, or close liquid pipe and gas pipe; indoor heat exchanger, the first port of the indoor heat exchanger is connected with the liquid pipe, and the second port of the indoor heat exchanger is connected with the gas pipe; outdoor heat exchanger, outdoor heat exchanger The first port of the compressor is connected with the liquid pipe; the compressor, the first port of the compressor is connected with the gas pipe, and the second port of the compressor is connected with the second port of the outdoor heat exchanger; a memory, the memory stores a computer program; a processor, and The memory is connected to the valve assembly, and the processor executes the computer program to execute: obtain the switching information of the working mode of the air conditioner; control the valve assembly according to the switching information, so that the air pipe and the liquid pipe are closed in the order of the air pipe and the liquid pipe, and then according to the first Sequential opening of the liquid tubes after the trachea.

The air conditioner provided by the present application is provided with a refrigerant switching device, an indoor heat exchanger, an outdoor heat exchanger, a compressor, a storage and a processor. Wherein, the refrigerant switching device includes a liquid pipe, an air pipe and a valve assembly. The gas pipe is connected between the second port of the indoor heat exchanger and the first port of the compressor for conveying gas refrigerant. The liquid pipe is connected between the first port of the indoor heat exchanger and the first port of the outdoor heat exchanger for conveying liquid refrigerant. The valve assembly is arranged on the gas pipe and the liquid pipe to open or close the gas pipe and the liquid pipe.

When it is detected that the air conditioner needs to switch the working mode, according to the switching information, first control the air pipe opened in the current working mode to close, and then control the liquid pipe to close, so that the pressure in the liquid pipe returns to the initial value when the air conditioner is in standby state, and limits The refrigerant inside the indoor unit heat exchanger determines that the pressure of the liquid pipe is stable, that is, after the liquid pipe is completely closed, according to the switching information to control the target working mode to open the corresponding air pipe, so that a pressure difference is formed in the pipeline, and then the liquid pipe is controlled to open and restore. The refrigerant flows to complete the switching of the refrigerant flow direction. Among them, the working mode includes a cooling mode and a heating mode. Therefore, during the switching process of the working mode, the refrigerant inside the heat exchanger of the indoor unit is limited by closing the air pipe and the liquid pipe first, so as to reduce the amount of refrigerant to be balanced after the air pipe connected to the target working mode is connected, and reduce the high-pressure and low-pressure refrigerant during the connection process. Refrigerant noise caused by impact. At the same time, the switching of the refrigerant flow path can be realized without restricting the flow of the refrigerant, which greatly shortens the duration of the switching process, ensures the operation stability of the compressor, improves the cooling or heating effect of the air conditioner, and improves the reliability of the air conditioner.

In addition, according to the air conditioner in the above-mentioned technical solution provided by the present application, it can also have the following additional technical features:

In the above technical solution, further, the first port of the compressor includes an exhaust port and a suction port; the air pipe includes: a first pressure air pipe, connected between the exhaust port and the second port of the indoor heat exchanger; Two pressure gas pipes are connected between the suction port and the second port of the indoor heat exchanger; wherein the pressure of the first pressure gas pipe is greater than the pressure of the second pressure gas pipe.

In this technical solution, the gas pipe includes a first pressure gas pipe and a second pressure gas pipe, the exhaust port of the compressor is communicated with the indoor heat exchanger through the first pressure gas pipe, and the suction port of the compressor is exchanged with the indoor heat exchanger through the second pressure gas pipe Heater connected. Wherein, the pressure of the first pressure gas pipe is greater than the pressure of the second pressure gas pipe, that is, one high-pressure gas pipe and one low-pressure gas pipe. Therefore, the unidirectional circulation of the refrigerant is realized by controlling the first pressure air pipe and the second pressure air pipe, thereby realizing the cooling and heating functions of the air conditioner, and the structure is simple, the assembly is convenient, and the control is convenient.

Specifically, when the air conditioner is in the heating mode, the first pressure gas pipe and the liquid pipe are controlled to open, and the second pressure gas pipe is controlled to be closed, and the compressor pressurizes the gaseous refrigerant, so that the gaseous refrigerant becomes a high-temperature and high-pressure refrigerant, and passes through the first pressure pipe. A pressure gas pipe is transported to the indoor heat exchanger for condensation, liquefaction and heat release, so as to achieve the purpose of heating. After the liquefied liquid refrigerant is depressurized, it enters the outdoor heat exchanger through the liquid pipe for heat absorption and gasification, and then enters the compressor again after gasification. , for the next cycle. When the air conditioner is in the cooling mode, the second pressure gas pipe and the liquid pipe are controlled to open, and the first pressure gas pipe is controlled to be closed. After liquefaction and heat release, the liquid refrigerant in the outdoor heat exchanger is depressurized and then enters the indoor heat exchanger through a liquid pipe for gasification and heat absorption, so as to achieve the purpose of refrigeration. pressure treatment and proceed to the next cycle.

In any of the above technical solutions, further, the valve assembly includes: a first valve body, disposed in the liquid pipe, the first valve body is configured to open or close the liquid pipe; a second valve body, disposed in the first pressure gas pipe, The second valve body is configured to open or close the first pressure gas pipe; the third valve body is arranged on the second pressure gas pipe, and the third valve body is configured to open or close the second pressure gas pipe.

In this technical solution, the valve assembly includes: a first valve body, a second valve body and a third valve body, and are respectively arranged on the liquid pipe, the first pressure gas pipe, and the second pressure gas pipe, so that the liquid pipe and the two pressure gas pipes can be independently controlled. A trachea switch for easy control.

Further, when the air conditioner is in the heating mode, the first valve body and the second valve body are opened, and the third valve body is closed, so that the first pressure gas pipe and the liquid pipe are opened, and the second pressure gas pipe is disconnected. When the air conditioner is in the cooling mode, the first valve body and the third valve body are opened, and the second valve body is closed, so that the second pressure gas pipe and the liquid pipe are opened, and the first pressure gas pipe is disconnected.

In any of the above technical solutions, further, when the processor executes the computer program, the step of controlling the valve assembly according to the switching information is performed, which specifically includes: controlling the third valve body according to the switching information of the air conditioner switching from the cooling mode to the heating mode. control the first valve body to close; control the second valve body to open based on the first duration of the first valve body being closed reaches the first duration threshold; control the second valve body to open based on the second duration of the second valve body opening reaching the second duration threshold The first valve body is opened.

In this technical solution, when switching from the cooling mode to the heating mode, the third valve body is first controlled to close, so as to disconnect the second pressure gas pipe that is opened in the cooling mode. Then, the first valve body is controlled to be closed, so that the liquid pipe is closed, and the first period of time that the first valve body is closed is started to be counted. When the first duration reaches the first duration threshold, it means that the liquid pipe is completely closed and the pressure in the liquid pipe is stable. At this time, the second valve body is controlled to open, so that the first pressure gas pipe is opened, and the timing of the opening of the second valve body is started. Second time. When the second duration reaches the second duration threshold, indicating that the pressure difference between the gas pipe and the first pressure gas pipe is formed and stabilized, the liquid pipe is opened by controlling the first valve body to switch the flow direction of the refrigerant. Thereby, the amount of refrigerant to be balanced after the first pressure gas pipe is connected can be effectively reduced, and the noise of the refrigerant caused by the impact of the high-pressure and low-pressure refrigerants during the connection process is reduced. At the same time, the switching of the refrigerant flow path can be realized without restricting the flow of the refrigerant, which greatly shortens the duration of the switching process, ensures the operation stability of the compressor, improves the cooling or heating effect of the air conditioner, and improves the reliability of the air conditioner.

In any of the above technical solutions, further, when the processor executes the computer program, the step of controlling the valve assembly according to the switching information is performed, which specifically includes: controlling the second valve body according to the switching information of the air conditioner switching from the heating mode to the cooling mode. close, and then control the first valve body to close; control the third valve body to open based on the first duration of the closed first valve body reaching the first duration threshold; control the third valve body to open based on the third duration of the third valve body opening reaches the third duration threshold The first valve body is opened.

In this technical solution, when switching from the heating mode to the cooling mode, the second valve body is first controlled to close, so as to disconnect the first pressure gas pipe that is opened in the heating mode. Then, the first valve body is controlled to be closed, so that the liquid pipe is closed, and the first period of time that the first valve body is closed is started to be counted. When the first duration reaches the first duration threshold, it means that the liquid pipe has been completely closed and the pressure in the liquid pipe has been stabilized. At this time, the third valve body is controlled to be opened, so that the second pressure gas pipe is opened, and the third time period of the opening of the third valve body is started to be counted. When the third duration reaches the third duration threshold, indicating that the pressure difference between the gas pipe and the second pressure gas pipe is formed and stabilized, the first valve body is controlled to open the liquid pipe to switch the flow direction of the refrigerant. Therefore, the amount of refrigerant to be balanced after the second pressure gas pipe is connected can be effectively reduced, and the noise of the refrigerant caused by the impact of the high-pressure and low-pressure refrigerants during the connection process is reduced. At the same time, the switching of the refrigerant flow path can be realized without restricting the flow of the refrigerant, which greatly shortens the duration of the switching process, ensures the operation stability of the compressor, improves the cooling or heating effect of the air conditioner, and improves the reliability of the air conditioner.

Among them, the first duration threshold and the third duration threshold can be reasonably set according to the parameters and requirements of the air conditioner.

In any of the above technical solutions, further, the first valve body, the second valve body and the third valve body are proportional control valves; the processor is further configured to execute a computer program to control the second valve body or the third valve body The step of opening the valve body specifically includes: adjusting the opening degree of the proportional control valve multiple times according to the preset opening degree, so that the opening degree of the proportional control valve reaches the opening degree threshold.

In this technical solution, in the process of opening the second valve body or the third valve body, the opening degree of the proportional control valve is adjusted many times according to the preset opening degree, so that the valve body is slowly opened to the opening degree threshold, thereby increasing the pressure The stability during the transition process further reduces the noise generated when the working mode is switched, and improves the user experience.

In addition, since the first valve body can control the flow rate of the liquid pipe by adjusting the opening degree, the expansion valve used for throttling and decompression between the indoor and outdoor heat exchangers can be omitted, the system structure is simplified, and the cost is reduced.

According to a second aspect of the present application, a method for controlling an air conditioner is proposed, including: acquiring switching information of the working mode of the air conditioner; Close them in sequence, and then open them in the order of the trachea first and then the liquid.

In this technical solution, when it is detected that the air conditioner needs to switch the working mode, according to the switching information, the air pipe opened in the current working mode is controlled to close first, and then the liquid pipe is controlled to close, so that the pressure in the liquid pipe returns to the standby state of the air conditioner. and limit the refrigerant inside the indoor unit heat exchanger to ensure that the pressure of the liquid pipe is stable, that is, after the liquid pipe is completely closed, the corresponding gas pipe of the target working mode is controlled according to the switching information to open, so that a pressure difference is formed in the pipe, and then control The liquid pipe is opened, the refrigerant flow is restored, and the refrigerant flow direction switching is completed. Among them, the working mode includes a cooling mode and a heating mode. Therefore, during the switching process of the working mode, the refrigerant inside the heat exchanger of the indoor unit is limited by closing the air pipe and the liquid pipe first, so as to reduce the amount of refrigerant to be balanced after the air pipe connected to the target working mode is connected, and reduce the high-pressure and low-pressure refrigerant during the connection process. Refrigerant noise caused by impact. At the same time, the switching of the refrigerant flow path can be realized without restricting the flow of the refrigerant, which greatly shortens the duration of the switching process, ensures the operation stability of the compressor, improves the cooling or heating effect of the air conditioner, and improves the reliability of the air conditioner.

In any of the above technical solutions, further, the valve assembly includes a first valve body, a second valve body and a third valve body; the step of controlling the valve assembly according to the switching information specifically includes: switching from the cooling mode to the control mode according to the air conditioner. Switching information of the thermal mode, control the third valve body to close, and then control the first valve body to close; control the second valve body to open based on the first duration of the first valve body closing reaching the first duration threshold; based on the second valve body opening When the second duration reaches the second duration threshold, the first valve body is controlled to open.

In this technical solution, when switching from the cooling mode to the heating mode, the third valve body is first controlled to close, so as to disconnect the second pressure gas pipe that is opened in the cooling mode. Then, the first valve body is controlled to be closed, so that the liquid pipe is closed, and the first period of time that the first valve body is closed is started to be counted. When the first duration reaches the first duration threshold, it means that the liquid pipe is completely closed and the pressure in the liquid pipe is stable. At this time, the second valve body is controlled to open, so that the first pressure gas pipe is opened, and the timing of the opening of the second valve body is started. Second time. When the second duration reaches the second duration threshold, indicating that the pressure difference between the gas pipe and the first pressure gas pipe is formed and stabilized, the liquid pipe is opened by controlling the first valve body to switch the flow direction of the refrigerant. Therefore, the amount of refrigerant to be balanced after the first pressure gas pipe is connected can be effectively reduced, and the noise of the refrigerant caused by the impact of the high-pressure and low-pressure refrigerant during the connection of the gas and liquid pipes is reduced. At the same time, the switching of the refrigerant flow path can be realized without restricting the flow of the refrigerant, which greatly shortens the duration of the switching process, ensures the operation stability of the compressor, improves the cooling or heating effect of the air conditioner, and improves the reliability of the air conditioner.

In any of the above technical solutions, further, the valve assembly includes a first valve body, a second valve body and a third valve body; the step of controlling the valve assembly according to the switching information specifically includes: switching from the heating mode to the heating mode according to the air conditioner The switching information of the cooling mode, control the second valve body to close, and then control the first valve body to close; control the third valve body to open based on the first duration of the first valve body closing reaching the first duration threshold; based on the third valve body opening When the third duration reaches the third duration threshold, the first valve body is controlled to open.

In this technical solution, when switching from the heating mode to the cooling mode, the second valve body is first controlled to close, so as to disconnect the first pressure gas pipe that is opened in the heating mode. Then, the first valve body is controlled to be closed, so that the liquid pipe is closed, and the first period of time that the first valve body is closed is started to be counted. When the first duration reaches the first duration threshold, it means that the liquid pipe is completely closed and the pressure in the liquid pipe is stable. At this time, the third valve body is controlled to open, so that the second pressure gas pipe is opened, and the timing of the opening of the third valve body is started. third time. When the third duration reaches the third duration threshold, indicating that the pressure difference between the gas pipe and the second pressure gas pipe is formed and stabilized, the first valve body is controlled to open the liquid pipe to switch the flow direction of the refrigerant. Therefore, the amount of refrigerant to be balanced after the second pressure gas pipe is connected can be effectively reduced, and the noise of the refrigerant caused by the impact of the high-pressure and low-pressure refrigerants during the connection process is reduced. At the same time, the refrigerant flow can be switched without restricting the refrigerant flow, which greatly shortens the duration of the switching process, ensures the operating stability of the compressor, improves the cooling or heating effect of the air conditioner, and improves the reliability of the air conditioner.

According to a third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, executes the air conditioner control method proposed in the second aspect. Therefore, the computer-readable storage medium has all the beneficial effects of the air conditioner control method proposed in the second aspect.

Additional aspects and advantages of the present application will become apparent in the description section below, or learned by practice of the present application.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without any creative effort.

1 shows a schematic structural diagram of an air conditioner according to an embodiment of the present application;

FIG. 2 shows a schematic structural diagram of an air conditioner according to another embodiment of the present application;

FIG. 3 shows a schematic structural diagram of an air conditioner according to another embodiment of the present application;

FIG. 4 shows a schematic flowchart of a control method for an air conditioner according to an embodiment of the present application;

FIG. 5 shows a schematic flowchart of a control method for an air conditioner according to another embodiment of the present application;

FIG. 6 shows a schematic flowchart of a control method for an air conditioner according to another embodiment of the present application;

FIG. 7 shows a schematic flowchart of a control method for an air conditioner according to another embodiment of the present application;

FIG. 8 shows a schematic flowchart of a control method for an air conditioner according to another embodiment of the present application.

Wherein, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 3 is:

100 refrigerant switching device, 102 liquid pipe, 104 first pressure gas pipe, 106 second pressure gas pipe, 110 valve assembly, 112 first valve body, 114 second valve body, 116 third valve body, 210 indoor heat exchanger, 212 The first port of the indoor heat exchanger, 214 The second port of the indoor heat exchanger, 220 The outdoor heat exchanger, 222 The first port of the outdoor heat exchanger, 230 The compressor, 232 The exhaust port, 234 The suction port, 240 Expansion valve.

The realization, functional characteristics and advantages of the purpose of the present application will be further described with reference to the accompanying drawings in conjunction with the embodiments.

detailed description

In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited to the specific details disclosed below. Example limitations.

An air conditioner, a control method of the air conditioner, and a computer-readable storage medium according to some embodiments of the present application are described below with reference to FIGS. 1 to 8 .

Example 1:

As shown in FIGS. 1 to 3 , according to an embodiment of the present application, an air conditioner is proposed, including: a refrigerant switching device 100 , an indoor heat exchanger 210 , an outdoor heat exchanger 220 , a compressor 230 , and a memory (Fig. not shown in the figure) and a processor (not shown in the figure).

In detail, the refrigerant switching device 100 includes a liquid pipe 102, a gas pipe (a first pressure gas pipe 104 and a second pressure gas pipe 106), and a valve assembly 110. The valve assembly 110 is disposed on the liquid pipe 102 and the gas pipe, and the valve assembly 110 is configured to open Liquid pipe 102 and gas pipe, or close liquid pipe 102 and gas pipe. The first port 212 of the indoor heat exchanger is connected to the liquid pipe 102, and the second port 214 of the indoor heat exchanger is connected to the gas pipe. The first port 222 of the outdoor heat exchanger is connected to the liquid pipe 102 . The first port of the compressor (the suction port 234 and the exhaust port 232 ) is connected to the air pipe, and the second port of the compressor is connected to the second port of the outdoor heat exchanger. That is, the gas pipe is connected between the second port 214 of the indoor heat exchanger and the first port of the compressor, and the liquid pipe 102 is connected between the first port 212 of the indoor heat exchanger and the first port 222 of the outdoor heat exchanger . The processor is connected to the memory and the valve assembly 110, and the processor executes a computer program to perform: acquiring switching information of the working mode of the air conditioner; controlling the valve assembly 110 according to the switching information, so that the air pipe and the liquid pipe 102 follow the air pipe first and then the liquid pipe 102 Close in the order of trachea first, then open the liquid pipe 102 in the order.

In this embodiment, the air conditioner is provided with a refrigerant switching device 100, an indoor heat exchanger 210, an outdoor heat exchanger 220, a compressor 230, a memory, and a processor. The refrigerant switching device 100 includes a liquid pipe 102 , an air pipe and a valve assembly 110 . The gas pipe is connected between the second port 214 of the indoor heat exchanger and the first port of the compressor for conveying gas refrigerant. The liquid pipe 102 is connected between the first port 212 of the indoor heat exchanger and the first port 222 of the outdoor heat exchanger for conveying liquid refrigerant. The valve assembly 110 is disposed on the gas pipe and the liquid pipe 102 to open or close the gas pipe and the liquid pipe 102 .

Wherein, when it is detected that the air conditioner needs to switch the working mode, according to the switching information, the trachea opened in the current working mode is controlled to close first, and then the liquid pipe 102 is controlled to close, so that the pressure in the liquid pipe 102 is restored to the state when the air conditioner is in standby state. The initial value, and limit the refrigerant inside the indoor unit heat exchanger, determine that the pressure of the liquid pipe 102 is stable, that is, after the liquid pipe 102 is completely closed, control the target working mode according to the switching information. The control liquid pipe 102 is opened, the flow of the refrigerant is restored, and the switching of the flow direction of the refrigerant is completed. Among them, the working mode includes a cooling mode and a heating mode. Therefore, during the switching process of the working mode, the refrigerant inside the heat exchanger of the indoor unit is limited by closing the air pipe and the liquid pipe 102 first, so as to reduce the amount of refrigerant to be balanced after the air pipe connected to the target working mode is connected, and reduce the connection process of the gas and liquid pipes. Refrigerant noise caused by the impact of medium and high pressure and low pressure refrigerants. At the same time, the refrigerant flow path switching can be realized without restricting the refrigerant flow, greatly shortening the duration of the switching process, ensuring the operation stability of the compressor 230, improving the cooling or heating effect of the air conditioner, and improving the reliability of the air conditioner.

Example 2:

As shown in FIG. 1 to FIG. 3 , according to an embodiment of the present application, the features defined in any of the above embodiments are included, and further: the first port of the compressor includes a discharge port 232 and a suction port 234 , and the air pipe includes A first pressure gas line 104 and a second pressure gas line 106 .

In detail, the first pressure gas pipe 104 is connected between the exhaust port 232 and the second port 214 of the indoor heat exchanger. The second pressure gas pipe 106 is connected between the suction port 234 and the second port 214 of the indoor heat exchanger. Wherein, the pressure endured by the first pressure gas pipe 104 is greater than the pressure endured by the second pressure gas pipe 106 .

In this embodiment, the gas pipe includes a first pressure gas pipe 104 and a second pressure gas pipe 106 , the exhaust port 232 of the compressor 230 communicates with the indoor heat exchanger 210 through the first pressure gas pipe 104 , and the suction port 234 of the compressor 230 It communicates with the indoor heat exchanger 210 through the second pressure gas pipe 106 . The pressure of the first pressure gas pipe 104 is greater than the pressure of the second pressure gas pipe 106 , that is, one high-pressure gas pipe and one low-pressure gas pipe. Therefore, by controlling the first pressure gas pipe 104 and the second pressure gas pipe 106, the unidirectional circulation of the refrigerant is realized, thereby realizing the cooling and heating functions of the air conditioner, and the structure is simple, the assembly is convenient, and the control is convenient.

Specifically, when the air conditioner is in the heating mode, the first pressure gas pipe 104 and the liquid pipe 102 are controlled to open, and the second pressure gas pipe 106 is controlled to be closed, and the compressor 230 pressurizes the gaseous refrigerant, so that the gaseous refrigerant becomes a high temperature and high pressure refrigerant , and is transported to the indoor heat exchanger 210 through the first pressure gas pipe 104 under the action of the pressure difference for condensation, liquefaction and heat release, thereby achieving the purpose of heating. The liquefied liquid refrigerant is depressurized and then enters the outdoor heat exchanger 220 through the liquid pipe 102 Endothermic gasification is performed, and after gasification, it enters the compressor 230 again for the next cycle. When the air conditioner is in the cooling mode, the second pressure gas pipe 106 and the liquid pipe 102 are controlled to open, and the first pressure gas pipe 104 is controlled to be closed, and the compressor 230 pressurizes the gaseous refrigerant, so that the gaseous refrigerant becomes a high temperature and high pressure refrigerant, and is sent to The outdoor heat exchanger 220 liquefies and releases heat. After the liquid refrigerant in the outdoor heat exchanger 220 is depressurized, it enters the indoor heat exchanger 210 through the liquid pipe 102 for gasification and heat absorption, so as to achieve the purpose of refrigeration. It is sent to the compressor 230, and the pressure treatment is performed again, and the next cycle is performed.

Example 3:

As shown in FIG. 1 and FIG. 2 , according to an embodiment of the present application, the features defined in any of the above embodiments are included, and further: the valve assembly 110 includes: a first valve body 112 , a second valve body 114 and a third valve body 114 . Valve body 116 .

In detail, the first valve body 112 is disposed on the liquid pipe 102 for opening or closing the liquid pipe 102 . The second valve body 114 is disposed on the first pressure gas pipe 104 for opening or closing the first pressure gas pipe 104 , and the third valve body 116 is disposed on the second pressure gas pipe 106 for opening or closing the second pressure gas pipe 106 .

In this embodiment, the valve assembly 110 includes: a first valve body 112 , a second valve body 114 and a third valve body 116 , which are respectively disposed on the liquid pipe 102 , the first pressure gas pipe 104 and the second pressure gas pipe 106 , thereby The switches of the liquid pipe 102 and the two air pipes can be independently controlled, which is convenient for control.

Further, when the air conditioner is in the heating mode, the first valve body 112 and the second valve body 114 are opened, and the third valve body 116 is closed, so that the first pressure gas pipe 104 and the liquid pipe 102 are opened, and the second pressure gas pipe 106 disconnect. When the air conditioner is in the cooling mode, the first valve body 112 and the third valve body 116 are opened, and the second valve body 114 is closed, so that the second pressure gas pipe 106 and the liquid pipe 102 are opened, and the first pressure gas pipe 104 is disconnected.

It can be understood that the first valve body 112 , the second valve body 114 and the third valve body 116 may be ordinary on-off valve bodies, or may be proportional control valves capable of adjusting the opening degree, such as electric ball valves and electronic expansion valves. etc., it can also be a parallel combination of multiple on-off valve bodies (such as solenoid valves) with different diameters. In addition, since the first pressure gas pipe 104 and the second pressure gas pipe 106 are both connected to the second port 214 of the indoor heat exchanger, the second valve body 114 and the third valve body 116 can be replaced by a three-way valve.

Further, when the processor executes the computer program, it executes the step of controlling the valve assembly 110 according to the switching information, which specifically includes: controlling the third valve body 116 to close according to the switching information of the air conditioner switching from the cooling mode to the heating mode, and then controlling the first valve body 116 to close. The valve body 112 is closed; the second valve body 114 is controlled to open based on the first duration of the first valve body 112 being closed reaches the first duration threshold; the second valve body 114 is controlled to be opened based on the second duration of the second valve body 114 being opened reaches the second duration threshold. The valve body 112 is opened.

Specifically, when switching from the cooling mode to the heating mode, the third valve body 116 is controlled to be closed first, so as to disconnect the second pressure gas pipe 106 that is opened in the cooling mode. Then, the first valve body 112 is controlled to be closed, so that the liquid pipe 102 is closed, and the first period of time during which the first valve body 112 is closed is started. When the first duration reaches the first duration threshold, it means that the liquid pipe 102 has been completely closed, and the pressure in the liquid pipe 102 has also been stabilized. At this time, the second valve body 114 is controlled to be opened, so that the first pressure gas pipe 104 is opened, and the second duration of the opening of the second valve body 114 is started to be counted. When the second duration reaches the second duration threshold, indicating that the pressure difference between the air pipe and the first pressure air pipe 104 is formed and stabilized, the first valve body 112 is controlled to open the liquid pipe 102 to switch the refrigerant flow direction. This effectively reduces the amount of refrigerant to be balanced after the first pressure gas pipe 104 is connected, and reduces the refrigerant noise caused by the impact of the high-pressure and low-pressure refrigerants during the connection process. At the same time, the refrigerant flow path switching can be realized without restricting the refrigerant flow, greatly shortening the duration of the switching process, ensuring the operation stability of the compressor 230, improving the cooling or heating effect of the air conditioner, and improving the reliability of the air conditioner.

Still further, when the processor executes the computer program, it executes the step of controlling the valve assembly 110 according to the switching information, which specifically includes: controlling the second valve body 114 to close according to the switching information of the air conditioner switching from the heating mode to the cooling mode, and then controlling the second valve body 114 to close. A valve body 112 is closed; based on the first duration of the first valve body 112 being closed reaches the first duration threshold, the third valve body 116 is controlled to open; based on the third duration of the third valve body 116 being opened reaches the third duration threshold, the third valve body 116 is controlled to be opened A valve body 112 is opened.

Specifically, when switching from the heating mode to the cooling mode, the second valve body 114 is controlled to be closed first, so as to disconnect the first pressure gas pipe 104 that is opened in the heating mode. Then, the first valve body 112 is controlled to be closed, so that the liquid pipe 102 is closed, and the first period of time during which the first valve body 112 is closed is started. When the first duration reaches the first duration threshold, it means that the liquid pipe 102 has been completely closed and the pressure in the liquid pipe 102 has been stabilized. At this time, the third valve body 116 is controlled to open, so that the second pressure gas pipe 106 is opened, and the timing of the third The third time period for which the valve body 116 is open. When the third duration reaches the third duration threshold, indicating that the pressure difference between the air pipe and the second pressure air pipe 106 is formed and stabilized, the first valve body 112 is controlled to open the liquid pipe 102 to switch the refrigerant flow direction. This effectively reduces the amount of refrigerant to be balanced after the second pressure gas pipe 106 is connected, and reduces the refrigerant noise caused by the impact of the high-pressure and low-pressure refrigerants during the connection process. At the same time, the refrigerant flow path switching can be realized without restricting the refrigerant flow, greatly shortening the duration of the switching process, ensuring the operation stability of the compressor 230, improving the cooling or heating effect of the air conditioner, and improving the reliability of the air conditioner.

Among them, the first duration threshold, the second duration threshold and the third duration threshold can be reasonably set according to the parameters and requirements of the air conditioner, and the first duration threshold can be set within the range of 0 to 3 minutes, for example, 0.1s, 0.5s, 1s, 60s etc.

Example 4:

According to an embodiment of the present application, the features defined in any of the above embodiments are included, and further: the first valve body, the second valve body and the third valve body are all proportional control valves.

Specifically, the processor is further configured to execute a computer program to perform the step of controlling the opening of the second valve body or the third valve body, which specifically includes: adjusting the opening degree of the proportional control valve multiple times according to the preset opening degree, so that the proportional control valve The opening reaches the opening threshold.

In this embodiment, in the process of opening the second valve body or the third valve body, the opening degree of the proportional control valve is adjusted multiple times according to the preset opening degree, so that the valve body is slowly opened to the opening degree threshold, thereby increasing the pressure The stability during the transition process further reduces the noise generated when the working mode is switched, and improves the user experience.

For example, when the indoor unit switches from cooling mode to heating mode, when opening the first pressure gas pipe, first control the second valve body to open to the preset opening degree, and then open to full opening after the maintenance time reaches the second time length threshold, and then open the liquid The first valve body of the tube completes the mode switching from cooling to heating. Of course, there may be multiple preset opening degrees in the opening process, and the multiple preset opening degrees may be the same or different, and the maintenance time corresponding to each preset opening degree may also be the same or different. The sum of the corresponding maintenance times is reasonably set according to the second duration threshold.

In addition, as shown in FIG. 2 , since the first valve body 112 can control the flow rate of the liquid pipe 102 by adjusting the opening degree, the expansion valve used for throttling and decompression between the indoor and outdoor heat exchangers can be omitted, thereby simplifying the system structure. Reduce costs. Similarly, as shown in FIG. 3 , an expansion valve 240 for throttling and decompression between the indoor and outdoor heat exchangers is also used instead of the first valve body.

Example 5:

As shown in FIG. 4 , according to an embodiment of the second aspect of the present application, a method for controlling an air conditioner is proposed, and the method includes:

Step 302, acquiring the switching information of the working mode of the air conditioner;

Step 304 , the valve assembly is controlled according to the switching information, so that the gas pipe and the liquid pipe are closed in the order of the gas pipe first, then the liquid pipe, and then opened in the order of the gas pipe first, then the liquid pipe.

In this embodiment, when it is detected that the air conditioner needs to switch the working mode, according to the switching information, the air pipe opened in the current working mode is controlled to close first, and then the liquid pipe is controlled to close, so that the pressure in the liquid pipe returns to the standby state of the air conditioner. After confirming that the pressure of the liquid pipe is stable, that is, after the liquid pipe is completely closed, the corresponding gas pipe of the target working mode is controlled to open according to the switching information, so that a pressure difference is formed in the pipe, and then the gas pipe is opened. Control the opening of the liquid pipe, restore the refrigerant flow, and complete the switching of the refrigerant flow direction. Among them, the working mode includes a cooling mode and a heating mode. Therefore, during the switching process of the working mode, the refrigerant inside the heat exchanger of the indoor unit is limited by closing the air pipe and the liquid pipe first, so as to reduce the amount of refrigerant to be balanced after the air pipe connected to the target working mode is connected, and reduce the amount of refrigerant in the connection process of the gas and liquid pipes. Refrigerant noise from high pressure and low pressure refrigerant shock. At the same time, the switching of the refrigerant flow path can be realized without restricting the flow of the refrigerant, which greatly shortens the duration of the switching process, ensures the operation stability of the compressor, improves the cooling or heating effect of the air conditioner, and improves the reliability of the air conditioner.

Example 6:

As shown in FIG. 5 , according to an embodiment of the present application, a method for controlling an air conditioner is proposed, and the method includes:

Step 402, acquiring the switching information of the working mode of the air conditioner;

Step 404, control the third valve body to close, and then control the first valve body to close according to the switching information of the air conditioner switching from the cooling mode to the heating mode;

Step 406, timing the first period of time that the first valve body is closed;

Step 408, whether the first duration reaches the first duration threshold, if so, go to Step 410, if not, go to Step 406;

Step 410, controlling the opening of the second valve body, and timing the second duration of the opening of the second valve body;

Step 412, whether the second duration reaches the second duration threshold, if yes, go to Step 414, if not, go to Step 410;

Step 414, control the first valve body to open.

In this embodiment, when switching from the cooling mode to the heating mode, the third valve body is controlled to be closed first, so as to disconnect the second pressure gas pipe that is opened in the cooling mode. Then, the first valve body is controlled to be closed, so that the liquid pipe is closed, and the first period of time that the first valve body is closed is started to be counted. When the first duration reaches the first duration threshold, it means that the liquid pipe is completely closed and the pressure in the liquid pipe is stable. At this time, the second valve body is controlled to open, so that the first pressure gas pipe is opened, and the timing of the opening of the second valve body is started. Second time. When the second duration reaches the second duration threshold, indicating that the pressure difference between the gas pipe and the first pressure gas pipe is formed and stabilized, the liquid pipe is opened by controlling the first valve body to switch the flow direction of the refrigerant. Thereby, the amount of refrigerant to be balanced after the first pressure gas pipe is connected can be effectively reduced, and the noise of the refrigerant caused by the impact of the high-pressure and low-pressure refrigerants during the connection process is reduced. At the same time, the refrigerant flow path switching can be realized without restricting the refrigerant flow, greatly shortening the duration of the switching process, ensuring the operating stability of the compressor, improving the cooling or heating effect of the air conditioner, and improving the reliability of the air conditioner.

Example 7:

As shown in FIG. 6 , according to an embodiment of the present application, a method for controlling an air conditioner is proposed, which includes:

Step 502, acquiring the switching information of the working mode of the air conditioner;

Step 504, controlling the second valve body to close, and then controlling the first valve body to close according to the switching information of the air conditioner switching from the heating mode to the cooling mode;

Step 506, timing the first duration of the closing of the first valve body;

Step 508, whether the first duration reaches the first duration threshold, if yes, go to Step 510, if not, go to Step 506;

Step 510, controlling the opening of the third valve body, and timing the third duration of the opening of the third valve body;

Step 512, whether the third duration reaches the third duration threshold, if yes, go to Step 514, if not, go to Step 510;

Step 512, control the first valve body to open.

In this embodiment, when switching from the heating mode to the cooling mode, the second valve body is controlled to be closed first, so as to disconnect the first pressure gas pipe that is opened in the heating mode. Then, the first valve body is controlled to be closed, so that the liquid pipe is closed, and the first period of time that the first valve body is closed is started to be counted. When the first duration reaches the first duration threshold, it means that the liquid pipe is completely closed and the pressure in the liquid pipe is stable. At this time, the third valve body is controlled to open, so that the second pressure gas pipe is opened, and the timing of the opening of the third valve body is started. third time. When the third duration reaches the third duration threshold, indicating that the pressure difference between the gas pipe and the second pressure gas pipe is formed and stabilized, the first valve body is controlled to open the liquid pipe to switch the flow direction of the refrigerant. Therefore, the amount of refrigerant to be balanced after the second pressure gas pipe is connected can be effectively reduced, and the noise of the refrigerant caused by the impact of the high-pressure and low-pressure refrigerants during the connection process is reduced.

Example 8:

As shown in FIG. 7 , according to an embodiment of the present application, a method for controlling an air conditioner is proposed. The third valve body of the air conditioner is a proportional control valve, and the method includes:

Step 602, obtaining the switching information of the working mode of the air conditioner;

Step 604, control the second valve body to close, and then control the first valve body to close according to the switching information of the air conditioner switching from the heating mode to the cooling mode;

Step 606, timing the first duration of the closing of the first valve body;

Step 608, whether the first duration reaches the first duration threshold, if yes, go to Step 610, if not, go to Step 606;

Step 610, controlling the opening of the third valve body, and adjusting the opening degree of the third valve body multiple times according to the preset opening degree;

Step 612, timing the third duration of the opening of the third valve body;

Step 614, whether the third duration reaches the third duration threshold, if so, go to step 616, if not, go to step 612;

Step 616, control the first valve body to open.

In this embodiment, when the indoor unit is switched from the heating mode to the cooling mode, when the second pressure gas pipe is opened, that is, during the process of opening the third valve body, the opening degree of the second valve body is adjusted multiple times according to the preset opening degree. The opening degree, specifically, first control the third valve body to open to the first preset opening degree. , continue to increase the opening degree of the third valve body according to the next preset opening degree, and cycle continuously until the third valve body slowly opens to the opening degree threshold, and then open the first valve body of the liquid pipe to complete the heating to cooling process. Mode switch. Thereby, the stability during the pressure transition process is improved, the noise generated when the working mode is switched is further reduced, and the user experience is improved.

It can be understood that there can be multiple preset opening degrees during the opening process, the multiple preset opening degrees can be the same or different, and the maintenance time corresponding to each preset opening degree can also be the same or different. It is assumed that the sum of the holding time corresponding to the opening degree is reasonably set according to the third duration threshold.

Example 9:

As shown in FIG. 8 , according to an embodiment of the present application, a method for controlling an air conditioner is proposed. The second valve body of the air conditioner is a proportional control valve, and the method includes:

Step 702, acquiring the switching information of the working mode of the air conditioner;

Step 704, controlling the third valve body to close, and then controlling the first valve body to close, according to the switching information of the air conditioner switching from the cooling mode to the heating mode;

Step 706, timing the first duration of the closing of the first valve body;

Step 708, whether the first duration reaches the first duration threshold, if yes, go to Step 710, if not, go to Step 706;

Step 710, controlling the opening of the second valve body, and adjusting the opening degree of the second valve body multiple times according to the preset opening degree;

Step 712, timing the second duration of the opening of the second valve body;

Step 714, whether the second duration reaches the second duration threshold, if yes, go to Step 716, if not, go to Step 712;

Step 716, control the first valve body to open.

In this embodiment, when the indoor unit is switched from the cooling mode to the heating mode, when the first pressure gas pipe is opened, that is, during the process of opening the second valve body, the opening degree of the second valve body is adjusted multiple times according to the preset opening degree. opening. Specifically, first control the second valve body to open to the first preset opening degree, and after the maintaining time of the second valve body being opened according to the first preset opening degree reaches the time threshold corresponding to the first preset opening degree, follow the following steps: A preset opening degree continues to increase the opening degree of the second valve body, and the cycle continues until the second valve body slowly opens to the opening degree threshold, and then the first valve body of the liquid pipe is opened to complete the mode switching from cooling to heating. Thereby, the stability during the pressure transition process is improved, the noise generated when the working mode is switched is further reduced, and the user experience is improved.

It should be noted that the sum of the holding times corresponding to the multiple preset opening degrees is reasonably set according to the second duration threshold.

Example 10:

According to a specific embodiment of the present application, a control method of an air conditioner is proposed.

Specifically, as shown in FIG. 2 , the gas pipe (the first port 212 of the indoor heat exchanger) and the liquid pipe (the second port 214 of the indoor heat exchanger) of the heat exchanger of the indoor unit are connected with the switching device (the refrigerant switching device). 100) The indoor side gas pipe (the first pressure gas pipe 104 and the second pressure gas pipe 106) and the liquid pipe 102 are respectively connected; The pressure gas pipe 106) is respectively connected with the liquid pipe of the heat exchanger of the outdoor unit (the first port 222 of the outdoor heat exchanger), the high pressure gas pipe (exhaust port 232) and the low pressure gas pipe (suction port 234) of the compressor of the outdoor unit )connect. The medium-pressure liquid pipe 102 on the outdoor side of the switching device is connected to the liquid pipe on the indoor side through an electric ball valve (the first valve body 112 ), and the high-pressure gas pipe and the low-pressure gas pipe on the outdoor side are respectively connected to an electric ball valve (the second valve body 114 , the third valve body 112 ) 116), connect with the indoor side trachea at the same time.

When the indoor unit heat exchanger operates in the cooling mode, the switching device opens the electric ball valve on the medium-pressure liquid pipe 102 on the outdoor side, the indoor side of the switching device communicates with the liquid pipe 102 on the outdoor side, the electric ball valve on the low-pressure gas pipe on the outdoor side opens, and the high pressure The electric ball valve on the gas pipe is closed, and the indoor side gas pipe of the switching device is connected with the outdoor side low pressure gas pipe. The refrigerant flows into the indoor unit heat exchanger from the medium pressure liquid pipe 102, and then flows out from the low pressure air pipe.

When the indoor unit heat exchanger operates in the heating mode, the switching device opens the electric ball valve on the liquid pipe 102 on the indoor side, the indoor side of the switching device communicates with the liquid pipe 102 on the outdoor side, the electric ball valve on the high-pressure gas pipe on the outdoor side opens, and the outdoor side The electric ball valve on the low pressure gas pipe is closed, and the indoor side gas pipe is connected with the outdoor side high pressure gas pipe. The refrigerant flows into the indoor unit heat exchanger from the high-pressure gas pipe, and then flows out from the outdoor side liquid pipe 102 .

When the indoor unit switches from the cooling mode to the heating mode, the indoor unit air pipe needs to be switched from the outdoor low-pressure air pipe that was originally connected to the outdoor high-pressure air pipe. Under the action of the pressure difference, the refrigerant of the indoor unit flows from the original liquid pipe 102 to the air pipe, and becomes the air pipe to flow to the liquid pipe 102. When the switching device performs switching, first close the electric ball valve of the low-pressure gas pipe on the outdoor side, then close the electric ball valve on the liquid pipe 102, and then open the valve body on the high-pressure gas pipe on the outdoor side to the opening degree A, and then open to fully open after the maintenance time ta, Finally, the valve body of the liquid pipe 102 is opened to complete the mode switching from cooling to heating.

When the indoor unit switches from the heating mode to the cooling mode, the indoor unit air pipe needs to be switched from the outdoor high-pressure air pipe that was originally connected to the outdoor low-pressure air pipe. Under the action of the pressure difference, the refrigerant of the indoor unit flows from the original air pipe to the liquid pipe 102, and the liquid pipe 102 flows to the air pipe. When the switching device performs switching, first close the electric ball valve of the high-pressure gas pipe on the outdoor side, then close the electric ball valve on the liquid pipe 102 on the outdoor side, and then open the valve body on the low-pressure gas pipe on the outdoor side to the opening degree B, and open to full after maintaining time tb. open, and finally open the valve body of the liquid pipe 102 to complete the mode switching from heating to cooling.

As shown in Fig. 3, the control of the electric ball valve can be realized by replacing the expansion valve 240 on the liquid pipe of the indoor unit (the throttling electronic expansion valve of the heating or cooling system).

Further, the air conditioner may be a household air conditioner, or may be an air conditioner unit composed of one outdoor unit and multiple indoor units. It can be understood that, the switching device may be a single unit, or a plurality of units may be connected in parallel, that is, in the air conditioning unit, each indoor unit is connected with a corresponding switching device.

The valve bodies used for the high-pressure gas pipe and the low-pressure gas pipe of the switching device can be valve bodies that can adjust the opening degree, including electric ball valves, electronic expansion valves, and the like. Alternatively, multiple on-off valve bodies (such as solenoid valves) with different calibers can be combined in parallel to replace the above valve bodies. The small-caliber valve body is opened when balancing, and the large-caliber valve body is opened after the balance is completed. As shown in FIG. 3 , the valve body for shutting off the liquid pipe 102 of the switching device can be placed in the switching device, or can be replaced by an electronic expansion valve on the liquid pipe of the indoor unit (the second port 214 of the indoor heat exchanger).

In this embodiment, during the switching process, the air pipe connected before the switching is closed first, then the liquid pipe 102 is closed, then the air pipe to be connected after the switching is slowly connected, and finally the liquid pipe 102 is opened to restore the flow of the refrigerant and complete the flow of the refrigerant. switch. Therefore, by restricting the refrigerant inside the heat exchanger of the indoor unit, the amount of refrigerant to be balanced after the air pipes connected to the latter mode are connected can be reduced, the refrigerant noise generated during the connection process can be reduced, and the duration of the switching process can be shortened.

Example 11:

According to an embodiment of the third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, executes the air conditioner control method proposed in the second aspect. Therefore, the computer-readable storage medium has all the beneficial effects of the air conditioner control method proposed in the second aspect, which will not be repeated here.

In the description of this specification, the terms "first" and "second" are only used for the purpose of description, and should not be construed as indicating or implying relative importance, unless otherwise explicitly specified and limited; the terms "connection", " "Installation" and "fixing" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in this application at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. An air conditioner comprising:

   A refrigerant switching device includes a liquid pipe, a gas pipe and a valve assembly, the valve assembly is arranged on the liquid pipe and the gas pipe, and the valve assembly is configured to open the liquid pipe and the gas pipe, or close the liquid pipe a tube and said trachea;

   an indoor heat exchanger, the first port of the indoor heat exchanger is connected to the liquid pipe, and the second port of the indoor heat exchanger is connected to the gas pipe;

   an outdoor heat exchanger, the first port of the outdoor heat exchanger is connected to the liquid pipe;

   a compressor, the first port of the compressor is connected with the gas pipe, the second port of the compressor is connected with the second port of the outdoor heat exchanger;

   a memory in which a computer program is stored;

   a processor, connected with the memory and the valve assembly, the processor executing the computer program to perform:

   acquiring the switching information of the working mode of the air conditioner;

   The valve assembly is controlled according to the switching information, so that the air pipe and the liquid pipe are closed in the order of the air pipe first and then the liquid pipe, and then opened in the order of the air pipe first and then the liquid pipe.
2. The air conditioner of claim 1, wherein the first port of the compressor includes an exhaust port and a suction port; and the air pipe includes:

   a first pressure gas pipe, connected between the exhaust port and the second port of the indoor heat exchanger;

   A second pressure gas pipe is connected between the suction port and the second port of the indoor heat exchanger;

   Wherein, the pressure endured by the first pressure gas pipe is greater than the pressure endured by the second pressure gas pipe.
3. The air conditioner of claim 2, wherein the valve assembly comprises:

   a first valve body, disposed on the liquid pipe, the first valve body is configured to open or close the liquid pipe;

   a second valve body, disposed on the first pressure gas pipe, the second valve body is configured to open or close the first pressure gas pipe;

   A third valve body is arranged on the second pressure gas pipe, and the third valve body is configured to open or close the second pressure gas pipe.
4. The air conditioner according to claim 3, wherein, when the processor executes a computer program, the step of controlling the valve assembly according to the switching information is performed, specifically comprising:

   controlling the third valve body to close, and then controlling the first valve body to close according to the switching information of the air conditioner switching from the cooling mode to the heating mode;

   controlling the second valve body to open based on the first duration of the first valve body being closed reaching a first duration threshold;

   The first valve body is controlled to open based on the second duration of the opening of the second valve body reaching a second duration threshold.
5. The air conditioner according to claim 3, wherein the step of controlling the valve assembly according to the switching information when the processor executes a computer program, specifically includes:

   controlling the second valve body to close, and then controlling the first valve body to close according to the switching information of the air conditioner switching from the heating mode to the cooling mode;

   controlling the third valve body to open based on the first duration of the closing of the first valve body reaching a first duration threshold;

   The first valve body is controlled to be opened based on the third time duration of the opening of the third valve body reaching a third duration threshold.
6. The air conditioner according to any one of claims 3 to 5, wherein,

   The first valve body, the second valve body and the third valve body are all proportional control valves;

   The processor is further configured to execute the computer program to perform the step of controlling the opening of the second valve body or the third valve body, specifically including:

   The opening degree of the proportional control valve is adjusted multiple times according to the preset opening degree, so that the opening degree of the proportional control valve reaches an opening degree threshold.
7. A control method for an air conditioner, used in the air conditioner according to any one of claims 1 to 6, wherein the control method comprises:

   acquiring the switching information of the working mode of the air conditioner;

   The valve assembly is controlled according to the switching information, so that the air pipe and the liquid pipe are closed in the order of the air pipe first and then the liquid pipe, and then opened in the order of the air pipe first and then the liquid pipe.
8. The control method of an air conditioner according to claim 7, wherein the valve assembly comprises a first valve body, a second valve body and a third valve body; the step of controlling the valve assembly according to the switching information, Specifically include:

   controlling the third valve body to close, and then controlling the first valve body to close according to the switching information of the air conditioner switching from the cooling mode to the heating mode;

   controlling the second valve body to open based on the first duration of the first valve body being closed reaching a first duration threshold;

   The first valve body is controlled to open based on the second duration of the opening of the second valve body reaching a second duration threshold.
9. The control method of an air conditioner according to claim 7, wherein the valve assembly comprises a first valve body, a second valve body and a third valve body; the step of controlling the valve assembly according to the switching information, Specifically include:

   controlling the second valve body to close, and then controlling the first valve body to close according to the switching information of the air conditioner switching from the heating mode to the cooling mode;

   controlling the third valve body to open based on the first duration of the first valve body being closed reaching a first duration threshold;

   The first valve body is controlled to be opened based on the third duration of the opening of the third valve body reaching a third duration threshold.
10. A computer-readable storage medium on which a computer program is stored, wherein the computer program, when executed by a processor, executes the control method of an air conditioner according to any one of claims 7 to 9.

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