CN110542228A

CN110542228A - Air conditioner, control method and device thereof, and computer-readable storage medium

Info

Publication number: CN110542228A
Application number: CN201910866069.5A
Authority: CN
Inventors: 朱兴丹; 徐振坤; 白崇俨; 杜顺开; 喻广南
Original assignee: Midea Group Co Ltd; Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2019-12-06

Abstract

The invention provides an air conditioner and a control method, a control device and a computer readable storage medium thereof, wherein a first switch device is arranged on at least one of a first pipeline and a second pipeline and is used for controlling the on-off of the pipeline where the first switch device is arranged, and a controller is respectively electrically connected with a throttling mechanism and a compressor and is used for: and responding to a shutdown instruction, controlling the throttle mechanism to be closed, and controlling the compressor to continue to operate so as to disconnect the third pipeline, wherein the first pipeline is conducted along the direction from the exhaust port to the first port, and the second pipeline is conducted along the direction from the third port to the suction port, so that at least part of the refrigerant in the indoor heat exchanger can be transferred to the outdoor heat exchanger, or at least part of the refrigerant in the outdoor heat exchanger can be transferred to the indoor heat exchanger. According to the air conditioner provided by the invention, when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable operation state as soon as possible, the high-low pressure difference for establishing system balance is accelerated, and the refrigerating and heating speed of the air conditioner is increased.

Description

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

Technical Field

The present invention relates to the field of refrigeration equipment, and more particularly, to an air conditioner, a control method thereof, a control device thereof, and a computer-readable storage medium.

Background

When the air conditioner reaches a stable operation state, the refrigerant quantity of the high-pressure side is relatively large, and the refrigerant quantity of the low-pressure side is relatively small. Before the air conditioner is started, the pressure at each part of the system is equal, so that the high-low pressure difference of the system needs to be reestablished for a long time, and the refrigerating and heating speed of the air conditioner is slow after the air conditioner is started. At present, various manufacturers mainly adopt a high-frequency starting or rapid frequency increasing mode of a compressor to increase the refrigerating and heating speed of an air conditioner.

When the compressor is started at a high frequency or is quickly increased in frequency, the refrigerant on the evaporator side is quickly sucked completely in a short time, the refrigerant on the condenser side cannot be completely liquefied in a short time, and an effective liquid seal is difficult to form at the throttling mechanism, so that the refrigerant flow passing through the throttling mechanism is greatly reduced, the refrigerant cannot be timely supplemented to the evaporator side, and the refrigerating and heating speed of the air conditioner is influenced.

Disclosure of Invention

the present invention is directed to solving at least one of the problems of the prior art.

To this end, a first aspect of the present invention is directed to an air conditioner.

A second aspect of the invention aims to provide a control method.

a third aspect of the present invention is directed to a control apparatus.

a fourth aspect of the present invention is directed to an air conditioner.

A fifth aspect of the present invention is directed to a computer-readable storage medium.

To achieve the above object, an aspect of the present invention provides an air conditioner, including: a compressor having an exhaust port and an intake port; the reversing component is provided with first to fourth ports, the first port is connected with the exhaust port through a first pipeline, and the third port is connected with the air suction port through a second pipeline; the first end of the outdoor heat exchanger is connected with the second port, and the first end of the indoor heat exchanger is connected with the fourth port; the second end of the outdoor heat exchanger is connected with the second end of the indoor heat exchanger through a third pipeline, and the throttling mechanism is arranged on the third pipeline and used for controlling the on-off of the third pipeline; the first switching device is arranged on at least one of the first pipeline and the second pipeline and is used for controlling the on-off of the pipeline where the first switching device is arranged; the controller is respectively electrically connected with the throttling mechanism and the compressor, and is used for: and responding to a shutdown instruction, controlling the throttle mechanism to be closed, and controlling the compressor to continue to operate so as to disconnect the third pipeline, wherein the first pipeline is communicated along the direction from the exhaust port to the first port, and the second pipeline is communicated along the direction from the third port to the suction port, so that at least part of the refrigerant in the indoor heat exchanger can migrate to the outdoor heat exchanger, or at least part of the refrigerant in the outdoor heat exchanger can migrate to the indoor heat exchanger.

In the air conditioner provided by the technical scheme, the controller responds to the shutdown instruction, the controller controls the throttle mechanism to be closed so as to disconnect the third pipeline and maintain the compressor to continue to operate, the compressor pumps the refrigerant in the indoor heat exchanger into the compressor through the second pipeline in the refrigeration mode, and the refrigerant discharged from the exhaust port of the compressor flows to the outdoor heat exchanger through the first pipeline, so that at least the refrigerant in the indoor heat exchanger is transferred to the outdoor heat exchanger in the shutdown stage, and when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable operation state as soon as possible, thereby accelerating the establishment of the high-low pressure difference of system balance and improving the refrigeration speed of the air conditioner.

in the heating mode, the compressor pumps the refrigerant in the outdoor heat exchanger into the compressor through the second pipeline, and the refrigerant discharged from the exhaust port of the compressor flows to the indoor heat exchanger through the first pipeline, so that at least the refrigerant in the outdoor heat exchanger is transferred to the indoor heat exchanger in the shutdown stage, and when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable running state as soon as possible, thereby accelerating the establishment of the high-low pressure difference of system balance and improving the heating speed of the air conditioner.

In addition, the air conditioner provided by the technical scheme of the invention also has the following additional technical characteristics:

In one embodiment, the first switching device includes a check valve, the check valve is in one-way communication in a direction from the exhaust port to the first port when the check valve is disposed on the first pipeline, and the check valve is in one-way communication in a direction from the third port to the suction port when the check valve is disposed on the second pipeline.

The check valve can only allow the refrigerant to flow in one direction, and cannot flow back in the other direction. The first switch device adopts the one-way valve, the control of the first pipeline or the second pipeline can be realized by utilizing the one-way conduction characteristic of the one-way valve, and the one-way valve is not required to be controlled by a controller, so that the control of the air conditioner is simpler.

When the check valve is arranged on the first pipeline, the refrigerant in the outdoor heat exchanger can be prevented from flowing back to the compressor when the refrigeration mode is shut down, and the refrigerant in the indoor heat exchanger can be prevented from flowing back to the compressor when the heating mode is shut down. When the check valve is arranged on the second pipeline, the refrigerant in the compressor can be prevented from flowing back to the indoor heat exchanger when the refrigeration mode is shut down, and the refrigerant in the compressor can be prevented from flowing back to the outdoor heat exchanger when the refrigeration mode is shut down.

In one embodiment, the throttling mechanism comprises a cut-off throttling mechanism which can be cut off.

The cut-off throttling mechanism has a cut-off function, so that the cut-off throttling mechanism can control the on-off of the third pipeline, and a switch device for controlling the third pipeline is not needed to be arranged at the moment, so that the structure of the air conditioner is further simplified, and the cost of the air conditioner is reduced.

In one embodiment, the stop throttle mechanism comprises an electronic expansion valve.

The electronic expansion valve can effectively improve the intelligent level of the air conditioner and improve the control precision of the air conditioner.

In one embodiment, the throttling mechanism includes a throttling mechanism body and a second switching device, which are connected in series, the third pipeline is divided into a first sub-pipeline and a second sub-pipeline by the throttling mechanism body, the second switching device is disposed on the first sub-pipeline, and the second switching device is electrically connected to the controller, so that the first sub-pipeline is turned on or off by receiving a control signal sent by the controller, or the second switching device is disposed on the second sub-pipeline, and the second switching device is electrically connected to the controller, so that the second sub-pipeline is turned on or off by receiving the control signal sent by the controller.

the throttle mechanism body can have a stop function, and at the moment, the throttle mechanism body can also be used for controlling the on-off of the third pipeline, for example, the throttle mechanism body is an electronic expansion valve; the throttle body may also have no shut-off function, for example, the throttle body is a capillary tube or a thermostatic expansion valve.

The on-off control of the third pipeline is realized through the combination of the throttling mechanism body and the second switch device, so that the refrigerant can be stored in the outdoor heat exchanger or the indoor heat exchanger when the air conditioner is shut down and the compressor continues to operate, and the refrigerating or heating speed is accelerated when the air conditioner is started next time.

In one embodiment, the second switch device comprises a second one-way electromagnetic cut-off valve or a second two-way electromagnetic cut-off valve.

the second switching device may be a solenoid valve, such as a one-way solenoid shut-off valve or a two-way solenoid shut-off valve. The on-off control of the third pipeline can be realized through the second one-way electromagnetic stop valve or the second bidirectional electromagnetic stop valve, for example, the on-off control of the first sub-pipeline is realized through the second switch device when the second switch device is positioned on the first sub-pipeline, and the on-off control of the second sub-pipeline is realized through the second switch device when the second switch device is positioned on the second sub-pipeline.

In one embodiment, the throttle body includes a capillary tube, a throttle valve, an electronic expansion valve or a thermal expansion valve.

The capillary tube and the thermostatic expansion valve have simple structures and low cost, and the electronic expansion valve can effectively improve the intelligent level of the air conditioner and improve the control precision of the air conditioner.

An aspect of a second aspect of the present invention provides a control method for controlling an air conditioner according to any one of the aspects of the first aspect, the control method including: responding to a shutdown instruction, controlling the throttle mechanism to be closed, controlling the compressor to continue to operate, so that the third pipeline is disconnected, and the first pipeline is conducted in a one-way mode along the direction from the exhaust port to the first port and/or the second pipeline is conducted in a one-way mode along the direction from the third port to the suction port, so that at least part of refrigerant in the indoor heat exchanger can be transferred to the outdoor heat exchanger, or at least part of refrigerant in the outdoor heat exchanger can be transferred to the indoor heat exchanger; the second end of the outdoor heat exchanger and the second end of the indoor heat exchanger are connected through the third pipeline, the first port is connected with the exhaust port through the first pipeline, and the third port is connected with the suction port through the second pipeline.

In the control method provided by the technical scheme of the second aspect of the invention, in response to a shutdown instruction, the controller controls the throttle mechanism to be closed so as to disconnect the third pipeline and maintain the compressor to continue to operate, the compressor pumps the refrigerant in the indoor heat exchanger into the compressor through the second pipeline in the refrigeration mode, and the refrigerant discharged from the exhaust port of the compressor flows to the outdoor heat exchanger through the first pipeline, so that at least part of the refrigerant in the indoor heat exchanger is transferred to the outdoor heat exchanger in the shutdown stage, and when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable operation state as soon as possible, thereby accelerating the establishment of the high-low pressure difference of the system balance and improving the refrigeration speed of the air conditioner.

In the heating mode, the compressor pumps the refrigerant in the outdoor heat exchanger into the compressor through the second pipeline, and the refrigerant discharged from the exhaust port of the compressor flows to the indoor heat exchanger through the first pipeline, so that at least part of the refrigerant in the outdoor heat exchanger is transferred to the indoor heat exchanger in the shutdown stage, and when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable running state as soon as possible, the establishment of the high-low pressure difference of system balance is accelerated, and the heating speed of the air conditioner is improved.

In one embodiment, after the responding to the shutdown instruction, controlling the throttle mechanism to close, and controlling the compressor to continue to operate, the method further includes: detecting working condition parameters of the air conditioner; and controlling the compressor to stop running when the working condition parameters meet preset conditions.

the working condition parameters of the air conditioner are detected, whether the working condition parameters meet preset conditions is judged, and when the working condition parameters meet the preset conditions, the compressor is controlled to stop running, so that the refrigerant is stored in the outdoor heat exchanger or the indoor heat exchanger, the time for the refrigerant to reach a stable running state when the air conditioner is started next time is shortened, and the refrigerating and heating speed is increased.

in one embodiment, the operating condition parameter satisfies a preset condition, and specifically includes: the air conditioner is shut down when running in a refrigeration mode, and any one of the continuous running time of the compressor is longer than a first preset time, the suction pressure of the compressor is lower than a first preset pressure, and the suction temperature of the compressor is lower than a first preset temperature; the air conditioner is shut down when running in a heating mode, and any one of the continuous running time of the compressor is longer than a second preset time, the suction pressure of the compressor is lower than a second preset pressure, and the suction temperature of the compressor is lower than a second preset temperature; the first preset time is equal to or different from the second preset time, the first preset pressure is equal to or different from the second preset pressure, and the first preset temperature is equal to or different from the second preset temperature.

the operating condition parameters include the length of time the compressor continues to operate, the suction pressure of the compressor, which refers to the pressure at the suction port of the compressor, or the suction temperature of the compressor, which refers to the temperature at the suction port of the compressor. When the working condition parameters meet the preset conditions, the compressor is controlled to stop running in time, so that the proper amount of refrigerant is stored in the indoor heat exchanger or the outdoor heat exchanger, and the problem that the energy consumption of the air conditioner is high due to long-term running of the compressor can be avoided.

In one embodiment, the range of the first preset time and the second preset time is 10s to 120s, the range of the first preset pressure and the second preset pressure is 0MPa to 0.6MPa, and the range of the first preset temperature and the second preset temperature is-30 ℃ to 0 ℃, so that a proper amount of refrigerant can be stored in the indoor heat exchanger or the outdoor heat exchanger, and the problems that the energy consumption of the air conditioner is high due to long-term operation of the compressor and the compressor is damaged due to long-time idling of the compressor can be avoided.

In one embodiment, the throttle mechanism includes a throttle mechanism body and a second switch device connected in series, and the controlling the throttle mechanism to close in response to the shutdown instruction includes: and controlling the second switching device to be closed, so that the throttling mechanism is closed, and the third pipeline is disconnected.

In one embodiment, the control method includes: and responding to a starting instruction, and controlling the throttle mechanism to be started so as to conduct the third pipeline.

and responding to the starting instruction, and starting the air conditioner to run, wherein the starting operation comprises the starting of a compressor. In order to ensure the normal circulation of the refrigerant, the throttle mechanism is controlled to be opened, so that the third pipeline is conducted, and the refrigerant flowing out of the exhaust port of the compressor realizes normal refrigeration circulation through the outdoor heat exchanger, the throttle mechanism and the indoor heat exchanger or realizes normal heating circulation through the indoor heat exchanger, the throttle mechanism and the outdoor heat exchanger. The refrigerant stored in the outdoor heat exchanger flows to the indoor heat exchanger or the refrigerant stored in the indoor heat exchanger flows to the outdoor heat exchanger, so that the starting-up refrigeration and heating speed is increased.

In one embodiment, the throttle mechanism includes a throttle mechanism body and a second switch device connected in series, and the controlling the throttle mechanism to open in response to the power-on command includes: and controlling the second switch device to be opened so as to control the throttle mechanism to be opened, so that the third pipeline is conducted.

An aspect of the third aspect of the present invention provides a control device, including a processor and a memory, where the processor is configured to implement the steps of the control method according to any one of the first aspect of the present invention when executing the computer program stored in the memory.

An aspect of the fourth aspect of the present invention provides an air conditioner including the control device according to the third aspect.

An aspect of the fifth aspect of the present invention provides a computer-readable storage medium having a computer program (instructions) stored thereon, characterized in that: the computer program (instructions), when executed by a processor, implement the steps of the control method according to any one of the claims of the second aspect.

additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

Fig. 1 is a schematic structural diagram of an air conditioner according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an air conditioner according to a second embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an air conditioner according to a third embodiment of the present invention;

Fig. 4 is a schematic structural diagram of an air conditioner according to a fourth embodiment of the present invention;

FIG. 5 is a flow chart illustrating a control method according to an embodiment of the present invention;

Fig. 6 is a schematic flow chart of a control method according to a fifth embodiment of the present invention;

FIG. 7 is a flow chart illustrating a control method according to an embodiment of the present invention;

Fig. 8 is a flowchart illustrating a control method according to a sixth embodiment of the present invention;

FIG. 9 is a flow chart illustrating a control method according to an embodiment of the present invention;

Fig. 10 is a schematic block diagram of a control device according to an embodiment of the present invention.

wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

the system comprises a compressor 1, an exhaust port 11, a suction port 12, a reversing component 2, an outdoor heat exchanger 3, an outdoor fan 4, a throttling mechanism 5, a throttling mechanism body 51, a second switching device 52, a one-way valve 6, an indoor heat exchanger 7, an indoor fan 8, a first pipeline 9, a second pipeline 10, a third pipeline 20, a first sub-pipeline 201, a second sub-pipeline 202, a control device 200, a memory 204 and a processor 206.

Detailed Description

in order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

An air conditioner, a control method thereof, a control apparatus thereof, and a computer-readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 10 of the accompanying drawings.

As shown in fig. 1, an air conditioner according to some embodiments of the present invention includes a compressor 1, a reversing assembly 2, an outdoor heat exchanger 3, an indoor heat exchanger 7, an outdoor fan 4, an indoor fan 8, a throttle mechanism 5, a first switching device, and a controller.

The compressor 1 has a discharge port 11 and a suction port 12.

The direction changing unit 2 has first to fourth ports, the first port being connected to the exhaust port 11 through a first pipe 9, and the third port being connected to the suction port 12 through a second pipe 10.

The first end of the outdoor heat exchanger 3 is connected with the second port, the first end of the indoor heat exchanger 7 is connected with the fourth port, the second end of the outdoor heat exchanger 3 is connected with the second end of the indoor heat exchanger 7 through a third pipeline 20, and the throttling mechanism 5 is arranged on the third pipeline 20 and used for controlling the on-off of the third pipeline 20.

The controller is electrically connected with the throttle mechanism 5 and the compressor 1, respectively.

the first embodiment is as follows:

the first switching device is arranged on the second pipeline 10 and used for controlling the on-off of the second pipeline 10.

During the refrigeration cycle, the refrigerant discharged from the exhaust port 11 of the compressor 1 flows to the first port of the reversing component 2 through the first pipeline 9, and flows to the outdoor heat exchanger 3, the throttling mechanism 5, the indoor heat exchanger 7 through the second port, the third port and the second pipeline 10 in sequence to flow back to the suction port 12 of the compressor 1.

During a heating cycle, a refrigerant discharged from an exhaust port 11 of the compressor 1 flows to a first port of the reversing assembly 2 through a first pipeline 9, sequentially flows to the indoor heat exchanger 7, the throttling mechanism 5, the outdoor heat exchanger 3 and flows back to an air suction port 12 of the compressor 1 through a second port, a third port and a second pipeline 10 through a fourth port.

The controller is used for: in response to the shutdown instruction, the throttling mechanism 5 is controlled to be closed, and the compressor 1 is controlled to continue to operate, so that the third pipeline 20 is disconnected, the first pipeline 9 is conducted in the direction from the exhaust port 11 to the first port, and the second pipeline 10 is conducted in the direction from the third port to the suction port 12, so that at least part of the refrigerant in the indoor heat exchanger 7 can migrate to the outdoor heat exchanger 3, or at least part of the refrigerant in the outdoor heat exchanger 3 can migrate to the indoor heat exchanger 7.

In the air conditioner provided by the above embodiment of the present invention, in response to the shutdown instruction, the controller controls the throttle mechanism 5 to close, so as to disconnect the third pipeline 20 and maintain the compressor 1 to continue to operate.

in the refrigeration mode, the compressor 1 sucks the refrigerant in the indoor heat exchanger 7 into the compressor 1 through the second pipeline 10, and the refrigerant discharged from the exhaust port 11 of the compressor 1 flows to the outdoor heat exchanger 3 through the first pipeline 9, so that at least part of the refrigerant in the indoor heat exchanger 7 is transferred to the outdoor heat exchanger 3 in the shutdown stage, and when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable running state as soon as possible, thereby accelerating the establishment of the high-low pressure difference of system balance and improving the refrigeration speed of the air conditioner.

In the heating mode, the compressor 1 sucks the refrigerant in the outdoor heat exchanger 3 into the compressor 1 through the second pipeline 10, and the refrigerant discharged from the exhaust port 11 of the compressor 1 flows to the indoor heat exchanger 7 through the first pipeline 9, so that at least part of the refrigerant in the outdoor heat exchanger 3 is transferred to the indoor heat exchanger 7 in the shutdown stage, and when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable running state as soon as possible, thereby accelerating the establishment of the high-low pressure difference of system balance and improving the heating speed of the air conditioner.

Further, the first switching device includes a check valve 6, and the check valve 6 is one-way conductive in a direction from the third port to the suction port 12.

The check valve 6 allows the refrigerant to flow in only one direction, and does not flow back in the other direction. The first switch device adopts the one-way valve 6, the control of the first pipeline 9 or the second pipeline 10 can be realized by utilizing the one-way conduction characteristic of the one-way valve 6, and a controller is not needed to control the one-way valve 6, so that the control of the air conditioner is simpler.

It will be appreciated that the non-return valve 6 may also be another valve with a shut-off function, such as a solenoid valve.

the second pipeline is in one-way conduction, so that the second pipeline can prevent the refrigerant in the compressor from flowing back to the indoor heat exchanger when the compressor is shut down in a refrigeration mode, and can prevent the refrigerant in the compressor from flowing back to the outdoor heat exchanger when the compressor is shut down in a heating mode.

Further, the throttling mechanism 5 includes a throttling mechanism body 51 and a second switching device 52 connected in series, the third pipeline 20 is divided into a first sub-pipeline 201 and a second sub-pipeline 202 by the throttling mechanism body 51, the second switching device 52 is disposed on the first sub-pipeline 201, the second switching device 52 is electrically connected with the controller to make the first sub-pipeline 201 conductive or disconnected by receiving a control signal sent by the controller, or the second switching device 52 is disposed on the second sub-pipeline 202, the second switching device 52 is electrically connected with the controller to make the second sub-pipeline 202 conductive or disconnected by receiving a control signal sent by the controller.

The throttle mechanism body 51 may have a cut-off function, and at this time, the throttle mechanism body 51 may also be used to control the on/off of the third pipeline 20, for example, the throttle mechanism body 51 is an electronic expansion valve; the throttle body 51 may not have a shut-off function, for example, the throttle body 51 may be a capillary tube or a thermal expansion valve.

The on-off control of the third pipeline 20 is realized through the combination of the throttle mechanism body 51 and the second switch device 52, so that the refrigerant can be stored in the indoor heat exchanger 7 or the outdoor heat exchanger 3 when the air conditioner shutdown compressor 1 continues to operate, and the cooling or heating speed is increased when the air conditioner is started next time.

Further, the second switching device 52 includes a second one-way electromagnetic cut-off valve or a second two-way electromagnetic cut-off valve.

The second switching device 52 may be a solenoid valve, such as a one-way solenoid shut-off valve or a two-way solenoid shut-off valve. The on-off of the third pipeline 20 can be controlled by the second one-way electromagnetic cut-off valve or the second two-way electromagnetic cut-off valve, for example, if the second switch device 52 is located on the first sub-pipeline 201, the on-off of the first sub-pipeline 201 is controlled by the second switch device 52, and if the second switch device 52 is located on the second sub-pipeline 202, the on-off of the second sub-pipeline 202 is controlled by the second switch device 52.

Further, the throttle mechanism body 51 includes a capillary tube, a throttle valve, an electronic expansion valve, or a thermal expansion valve.

Example two:

The difference from the first embodiment is that a first switch device is arranged on the first pipeline 9 and is used for controlling the on-off of the first pipeline 9.

when the air conditioner is shut down in the refrigeration mode, the throttling mechanism 5 is controlled to be closed in response to a shutdown instruction, the compressor 1 is kept to continue to operate, the first pipeline 9 is in one-way conduction along the direction from the exhaust port 11 to the first port, the refrigerant in the indoor heat exchanger 7 is sucked by the compressor 1 and then is exhausted from the exhaust port 11, the refrigerant flows into the outdoor heat exchanger 3 through the first pipeline 9, and when the working condition parameters of the air conditioner meet preset conditions, the compressor 1 is controlled to be closed, and the refrigerant in the outdoor heat exchanger 3 cannot flow back to the compressor 1 because the first pipeline 9 is in one-way conduction, so that the first switching device is arranged on the first pipeline 9, more refrigerants can be stored in the outdoor heat exchanger 3, and the startup refrigeration speed is further increased.

When the air conditioner is shut down in the heating mode, the throttling mechanism 5 is controlled to be closed in response to a shutdown instruction, the compressor 1 is kept to continue to operate, the first pipeline 9 is controlled to be in one-way conduction along the direction from the exhaust port 11 to the first port, the refrigerant in the outdoor heat exchanger 3 is sucked by the compressor 1 and then is exhausted from the exhaust port 11, the refrigerant flows into the indoor heat exchanger 7 through the first pipeline 9, and when working condition parameters of the air conditioner meet preset conditions, the compressor 1 is controlled to be closed, and the refrigerant in the indoor heat exchanger 7 cannot flow back to the compressor 1 due to the fact that the first pipeline 9 is in one-way conduction, therefore, the first switching device is arranged on the first pipeline 9, more refrigerants can be stored in the indoor heat exchanger 7, and the startup heating speed is further increased.

Example three:

As shown in fig. 3, the difference from the first embodiment is that the throttle means 5 includes a cut-off throttle means 5 which can be cut off.

The cut-off throttling mechanism 5 has a cut-off function, so the cut-off throttling mechanism 5 can control the on-off of the third pipeline 20, and a switch device for controlling the third pipeline 20 is not needed to be arranged at the moment, so the structure of the air conditioner is further simplified, and the cost of the air conditioner is reduced.

further, the stop throttle mechanism 5 includes an electronic expansion valve.

Example four:

as shown in fig. 4, the difference from the third embodiment is that a first switch device is provided on the first pipeline 9 for controlling the on/off of the first pipeline 9.

When the air conditioner is shut down in the refrigeration mode, the throttling mechanism 5 is controlled to be closed in response to a shutdown instruction, the compressor 1 is kept to continue to operate, the first pipeline 9 is controlled to be in one-way conduction along the direction from the exhaust port 11 to the first port, the refrigerant in the indoor heat exchanger 7 is sucked by the compressor 1 and then is exhausted from the exhaust port 11, the refrigerant flows into the outdoor heat exchanger 3 through the first pipeline 9, and when the working condition parameters of the air conditioner meet preset conditions, the compressor 1 is controlled to be closed, and the refrigerant in the outdoor heat exchanger 3 cannot flow back to the compressor 1 because the first pipeline 9 is in one-way conduction, therefore, the first switching device is arranged on the first pipeline 9, more refrigerants can be stored in the outdoor heat exchanger 3, and the startup refrigeration speed is further increased.

It can be understood that, the first switching device may be disposed on both the first pipeline and the second pipeline, and the first switching device disposed on the first pipeline controls the conduction of the first pipeline, and the first switching device disposed on the second pipeline controls the conduction of the second pipeline.

As shown in fig. 5, a second aspect of the present invention provides a control method for controlling an air conditioner according to any one of the first aspect, the control method comprising:

step S50, in response to the shutdown instruction, controlling the throttle mechanism 5 to close, and controlling the compressor 1 to continue to operate, so that the third pipeline 20 is disconnected, and the first pipeline 9 is unidirectionally conducted in a direction from the exhaust port 11 to the first port and/or the second pipeline 10 is unidirectionally conducted in a direction from the third port to the suction port 12, so that at least part of the refrigerant in the indoor heat exchanger 7 can migrate to the outdoor heat exchanger 3, or at least part of the refrigerant in the outdoor heat exchanger 3 can migrate to the indoor heat exchanger 7; wherein, the second end of the outdoor heat exchanger 3 and the second end of the indoor heat exchanger 7 are connected through a third pipeline 20, the first port is connected with the exhaust port 11 through a first pipeline 9, and the third port is connected with the suction port 12 through a second pipeline 10.

In the control method provided by the technical scheme of the second aspect of the invention, in response to a shutdown instruction, the controller controls the throttle mechanism 5 to close so as to disconnect the third pipeline 20, the compressor 1 is kept to continue to operate, the compressor 1 pumps the refrigerant in the indoor heat exchanger 7 into the compressor 1 through the second pipeline 10 in the refrigeration mode, and the refrigerant discharged from the exhaust port 11 of the compressor 1 flows to the outdoor heat exchanger 3 through the first pipeline 9, so that at least part of the refrigerant in the indoor heat exchanger 7 is transferred to the outdoor heat exchanger 3 in the shutdown stage, and when the air conditioner is started next time, the refrigerant of the air conditioner can reach a stable operation state as soon as possible, thereby accelerating the establishment of high-low pressure difference of system balance and improving the refrigeration speed of the air conditioner.

the shutdown instruction can be from a remote controller of the air conditioner, that is, a user sends the shutdown instruction to the air conditioner through the remote controller. The air conditioner can also automatically shut down in an automatic control mode according to the change of the indoor or outdoor temperature to generate a shutdown instruction, for example, when the indoor ambient temperature is lower than the preset temperature in the refrigeration mode, the air conditioner automatically shuts down, for example, when the indoor ambient temperature is detected to be lower than the preset temperature, the shutdown instruction is generated.

The starting instruction can be from a remote controller of the air conditioner, namely, a user sends the starting instruction to the air conditioner through the remote controller. The air conditioner can also be automatically controlled to automatically start according to the change of the indoor or outdoor temperature to generate a starting instruction, for example, when the indoor environment temperature is higher than the preset temperature in the refrigeration mode, the air conditioner automatically starts, for example, when the indoor environment temperature is higher than the preset temperature, the starting instruction is generated.

Example five:

As shown in fig. 6, a control method for controlling the air conditioners in the first and third embodiments.

The control method comprises the following steps:

in step S602, in response to the power-on command, the throttle mechanism 5 is controlled to open, so as to conduct the third pipeline 20.

In response to the power-on command, the air conditioner is powered on, including the compressor 1 being turned on. In order to ensure the normal circulation of the refrigerant, the throttle mechanism 5 is controlled to be opened, so that the third pipeline 20 is conducted, and the refrigerant flowing out of the exhaust port 11 of the compressor 1 realizes the normal refrigeration circulation through the outdoor heat exchanger 3, the throttle mechanism 5 and the indoor heat exchanger 7, or realizes the normal heating circulation through the indoor heat exchanger 7, the throttle mechanism 5 and the outdoor heat exchanger 3.

As shown in fig. 1, in the case where the throttle mechanism 5 includes the throttle mechanism body 51 and the second switching device 52 connected in series, step S602 includes: the second switching device 52 is controlled to be opened to control the throttle 5 to be opened, so that the third pipeline 20 is conducted.

Step S604 is included after step S602, and it is determined whether the air conditioner has received a shutdown instruction.

if it is determined that the air conditioner receives the shutdown instruction, step S606 is executed, and if it is determined that the air conditioner does not receive the shutdown instruction, step S602 is executed.

It should be noted that step S602 may be before or after step S606.

Step S606, in response to the shutdown instruction, controlling the throttling mechanism 5 to close, and controlling the compressor 1 to continue to operate, so that the third pipeline 20 is disconnected, the first pipeline 9 is connected, and the second pipeline 10 is connected in a one-way manner in a direction from the third port to the suction port 12, so that at least part of the refrigerant in the indoor heat exchanger 7 can be transferred to the outdoor heat exchanger 3 in the shutdown stage in the cooling mode, or at least part of the refrigerant in the outdoor heat exchanger 3 can be transferred to the indoor heat exchanger 7 in the shutdown stage in the heating mode.

Specifically, in response to a shutdown instruction in a refrigeration mode, the throttling mechanism 5 is controlled to be closed, the third pipeline 20 is disconnected, the compressor 1 is controlled to continue to operate, the second pipeline 10 is in one-way conduction along the direction from the third port to the suction port 12, the compressor 1 sucks the refrigerant in the indoor heat exchanger 7 to the compressor 1 through the second pipeline 10, and then the refrigerant flows out of the outdoor heat exchanger 3 through the first pipeline 9 through the exhaust port 11, so that at least part of the refrigerant in the indoor heat exchanger 7 can be transferred to the outdoor heat exchanger 3, the distribution of the refrigerant in a shutdown state is closer to the distribution of the refrigerant in stable operation, the stable time of the system after startup is reduced, and rapid refrigeration is realized. The second pipeline is communicated in one direction from the third port 10 to the suction port 12, so that the second pipeline can prevent the refrigerant in the compressor from flowing back to the indoor heat exchanger when the compressor is stopped.

Responding to a shutdown instruction in a heating mode, controlling the throttling mechanism 5 to close, disconnecting the third pipeline 20, controlling the compressor 1 to continue to operate, enabling the second pipeline 10 to be in one-way conduction along the direction from the third port to the suction port 12, enabling the compressor 1 to suck the refrigerant in the outdoor heat exchanger 3 to the compressor 1 through the second pipeline 10, and enabling the refrigerant to flow out of the indoor heat exchanger 7 through the first pipeline 9 through the exhaust port 11, so that at least part of the refrigerant in the outdoor heat exchanger 3 can be transferred to the indoor heat exchanger 7, enabling the distribution of the refrigerant in a shutdown state to be closer to the distribution of the refrigerant in stable operation, reducing the time for stabilizing the system after startup, and realizing rapid heating.

As shown in fig. 1, in the case where the throttle mechanism 5 includes the throttle mechanism body 51 and the second switching device 52 connected in series, step S606 includes: the second switching device 52 is controlled to close, so that the throttle means 5 is closed and the third line 20 is disconnected.

Further, step S606 is followed by:

step S608, detecting working condition parameters of the air conditioner;

Step S610, judging whether the working condition parameters meet preset conditions or not;

If the working condition parameters meet the preset conditions, executing step S612 and controlling the compressor 1 to stop running; and if the working condition parameters are judged not to meet the preset conditions, returning to the step S606.

the working condition parameters of the air conditioner are detected, whether the working condition parameters meet preset conditions is judged, and when the working condition parameters meet the preset conditions, the compressor 1 is controlled to stop running, so that the refrigerant is stored in the outdoor heat exchanger 3 or the indoor heat exchanger 7, the time for reaching the stable running state of the refrigerant when the air conditioner is started next time is shortened, and the refrigerating and heating speed is increased.

Further, the working condition parameters meet preset conditions, and specifically include: the air conditioner is shut down when running in a refrigeration mode, the continuous running time of the compressor 1 is longer than any one of a first preset time, the suction pressure of the compressor 1 is lower than a first preset pressure and the suction temperature of the compressor 1 is lower than a first preset temperature; the air conditioner is shut down when running in the heating mode, and any one of the continuous running time of the compressor 1 is longer than a second preset time, the suction pressure of the compressor 1 is lower than a second preset pressure, and the suction temperature of the compressor 1 is lower than a second preset temperature.

the operating parameters comprise the length of time the compressor 1 continues to operate, the suction pressure of the compressor 1, which means the pressure at the suction 12 of the compressor 1, or the suction temperature of the compressor 1, which means the temperature at the suction 12 of the compressor 1. When the working condition parameters meet the preset conditions, the compressor 1 is controlled to stop running in time, so that a proper amount of refrigerant is stored in the indoor heat exchanger 7 or the outdoor heat exchanger 3, and the problems that the energy consumption of the air conditioner is high due to long-term running of the compressor 1 and the compressor is damaged due to long-term idling of the compressor can be avoided.

Further, the first preset time period and the second preset time period range from 10s to 120 s. The first preset time period or the second preset time period may be, but is not limited to, 10s, 40s, 80s, or 120 s.

The range of the first preset time and the second preset time is controlled to be 10 s-120 s, the situation that the refrigerant stored in the indoor heat exchanger 7 or the outdoor heat exchanger 3 is insufficient due to the fact that the first preset time and the second preset time are shorter than 10s is avoided, and the situation that the refrigerant quantity discharged by the compressor 11 is larger than the capacity of the liquid accumulator indoor heat exchanger 7 or the outdoor heat exchanger 3 due to the fact that the first preset time and the second preset time are longer than 120s can also be avoided, and the situation that the energy consumption of the compressor 11 is higher and the compressor is damaged due to the fact that the compressor idles for a long time is caused.

The first preset duration and the second preset duration may be equal to or unequal to each other.

further, the range of the first preset pressure and the second preset pressure is 0 MPa-0.6 MPa, and the first preset pressure and the second preset pressure are equal or unequal. The first and second preset pressures may be, but are not limited to, 0MPa, 0.3MPa, or 0.6 MPa.

The range of the first preset pressure and the second preset pressure is 0 MPa-0.6 MPa, which not only can ensure that a proper amount of refrigerant is stored in the indoor heat exchanger 7 or the outdoor heat exchanger 3, but also can avoid the high energy consumption of the air conditioner caused by the long-term operation of the compressor 11 and the damage of the compressor caused by the long-term idle running of the compressor.

the first preset pressure and the second preset pressure may be equal or unequal.

Further, the range of the first preset temperature and the second preset temperature is-30 ℃ to 0 ℃, so that a proper amount of refrigerant is stored in the indoor heat exchanger 7 or the outdoor heat exchanger 3, and the high energy consumption of the air conditioner caused by the long-term operation of the compressor 1 and the damage of the compressor caused by the long-term idle running of the compressor can be avoided.

The first preset temperature and the second preset temperature may be equal or unequal. The first preset temperature may be, but is not limited to, -30 ℃, -20 ℃, -10 ℃ or 0 ℃.

As shown in fig. 7, in a specific embodiment, the control method of the air conditioner includes steps S702 to S712, in which the solenoid valve is a second switching device.

Example six:

A control method for controlling the air conditioners in the second and fourth embodiments.

As shown in fig. 8, the control method includes:

In step S802, in response to the power-on command, the throttle mechanism 5 is controlled to open, so as to conduct the third pipeline 20.

As shown in fig. 2, in the case where the throttle mechanism 5 includes the throttle mechanism body 51 and the second switching device 52 connected in series, step S802 includes: the second switching device 52 is controlled to be opened to control the throttle 5 to be opened, so that the third pipeline 20 is conducted.

Step S804 is included after step S802, and it is determined whether the air conditioner has received a shutdown command.

If it is determined that the air conditioner receives the shutdown command, step S806 is executed, and if it is determined that the air conditioner does not receive the shutdown command, step S802 is executed.

step S806, in response to the shutdown instruction, controls the throttling mechanism 5 to close, and controls the compressor 1 to continue to operate, so that the third pipeline 20 is disconnected, the first pipeline 9 is conducted in a single direction from the exhaust port 11 to the first port, and the second pipeline 10 is conducted, so that at least part of the refrigerant in the indoor heat exchanger 7 can be migrated to the outdoor heat exchanger 3 in the shutdown stage in the cooling mode, or at least part of the refrigerant in the outdoor heat exchanger 3 can be migrated to the indoor heat exchanger 7 in the shutdown stage in the heating mode.

specifically, in response to a shutdown instruction in a refrigeration mode, the throttling mechanism 5 is controlled to be closed, the third pipeline 20 is disconnected, the compressor 1 is controlled to continue to operate, the second pipeline 10 is in one-way conduction along the direction from the third port to the suction port 12, the compressor 1 sucks the refrigerant in the indoor heat exchanger 7 to the compressor 1 through the second pipeline 10, and then the refrigerant flows out of the outdoor heat exchanger 3 through the first pipeline 9 through the exhaust port 11, so that at least part of the refrigerant in the indoor heat exchanger 7 can be transferred to the outdoor heat exchanger 3, the distribution of the refrigerant in a shutdown state is closer to the distribution of the refrigerant in stable operation, the stable time of the system after startup is reduced, and rapid refrigeration is realized. Compared with the fifth embodiment, because the first pipeline 9 is conducted in one direction from the exhaust port 11 to the first port, the refrigerant discharged from the exhaust port 11 of the compressor 1 to the outdoor heat exchanger 3 cannot flow back to the compressor 1 from the first pipeline 9, so that the refrigerant in the outdoor heat exchanger 3 is prevented from flowing out of the outdoor heat exchanger 3, the refrigerant is further trapped in the outdoor heat exchanger 3, and the cooling speed in the next startup is further increased.

Responding to a shutdown instruction in a heating mode, controlling the throttle mechanism 5 to close, disconnecting the third pipeline 20, controlling the compressor 1 to continue to operate, conducting the second pipeline 10 in a one-way mode along a direction from the third port to the suction port 12, sucking the refrigerant in the outdoor heat exchanger 3 to the compressor 1 through the second pipeline 10 by the compressor 1, and then flowing out to the indoor heat exchanger 7 through the first pipeline 9 through the exhaust port 11, so that at least part of the refrigerant in the outdoor heat exchanger 3 can be transferred to the indoor heat exchanger 7, the distribution of the refrigerant in a shutdown state is closer to the distribution of the refrigerant in stable operation, the stable time of the system after startup is reduced, and rapid heating is realized. Compared with the fifth embodiment, because the first pipeline 9 is conducted in one direction from the exhaust port 11 to the first port, the refrigerant discharged from the exhaust port 11 of the compressor 1 to the indoor heat exchanger 7 cannot flow back to the compressor 1 from the first pipeline 9, so that the refrigerant in the indoor heat exchanger 7 is prevented from flowing out of the indoor heat exchanger 7, the refrigerant is further trapped in the indoor heat exchanger 7, and the heating speed in the next startup is further increased.

as shown in fig. 2, in the case where the throttle mechanism 5 includes the throttle mechanism body 51 and the second switching device 52 connected in series, step S806 includes: the second switching device 52 is controlled to close, so that the throttle means 5 is closed and the third line 20 is disconnected.

Further, step S806 is followed by:

step S808, detecting working condition parameters of the air conditioner;

Step S810, judging whether the working condition parameters meet preset conditions or not;

If the working condition parameters meet the preset conditions, executing step S812, and controlling the compressor 1 to stop running; and if the working condition parameters do not meet the preset conditions, returning to the step S806.

The first preset pressure and the second preset pressure are in the range of 0-0.6 MPa (absolute pressure), so that a proper amount of refrigerant is stored in the indoor heat exchanger 7 or the outdoor heat exchanger 3, and the problem that the energy consumption of the air conditioner is high due to long-term operation of the compressor 11 can be avoided.

As shown in fig. 9, in a specific embodiment, the control method of the air conditioner includes steps S902-S912.

it can be understood that, under the condition that the first pipeline and the second pipeline are both provided with the check valves, the distribution and the stable operation of the refrigerants in the outdoor heat exchanger and the indoor heat exchanger can be kept close to each other, and the next starting, refrigerating and heating speed is accelerated.

In summary, the air conditioner and the control method thereof provided by the embodiments of the present application can effectively prevent the refrigerant from migrating during the shutdown process by arranging the throttling mechanism capable of controlling the on-off of the third pipeline in the system, the refrigerant distribution in the shutdown state is closer to the refrigerant distribution in the stable operation, the system stabilization time after the startup is reduced, thereby realizing rapid refrigeration and heating, specifically, the compressor keeps running when the compressor is shut down and the throttle mechanism is closed, the running time is judged by time or suction pressure or suction temperature, if the compressor operation time exceeds a preset time period or the suction pressure is lower than a preset pressure or the suction temperature is lower than a preset temperature, and at the moment, the machine needs to be stopped, the refrigerant is transferred to the outdoor side during refrigeration, the refrigerant is transferred to the indoor side during heating, and the control valve at the throttling mechanism is opened at the same time during next starting, so that the establishment of the high-low pressure difference of the system balance is accelerated.

As shown in fig. 10, a third aspect of the present invention provides a control device 200, which includes a processor 206 and a memory 204, wherein the processor 206 is configured to implement the steps of the control method according to any one of the first aspect of the present invention when executing the computer program stored in the memory 204.

An aspect of the fourth aspect of the present invention provides an air conditioner including the control device 200 according to the third aspect.

An embodiment of a fifth aspect of the present invention provides a computer-readable storage medium having a computer program (instructions) stored thereon, characterized in that: the computer program (instructions), when executed by the processor 206, implement the steps of the control method as in any one of the embodiments of the second aspect.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage mediums comprising computer-usable program code(s) (including, but not limited to, disk storage 204, CD-ROM, optical storage 204, etc.).

the present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor 206 of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor 206 of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory 204 that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory 204 produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

it should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

In the description of the present invention, the term "plurality" means two or more unless explicitly specified or limited otherwise; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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

It will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined in the appended claims and their equivalents, and it is intended that the invention encompass such changes and modifications as well.

Claims

1. an air conditioner, comprising:

A compressor having an exhaust port and an intake port;

the reversing component is provided with first to fourth ports, the first port is connected with the exhaust port through a first pipeline, and the third port is connected with the air suction port through a second pipeline;

The first end of the outdoor heat exchanger is connected with the second port, and the first end of the indoor heat exchanger is connected with the fourth port;

The second end of the outdoor heat exchanger is connected with the second end of the indoor heat exchanger through a third pipeline, and the throttling mechanism is arranged on the third pipeline and used for controlling the on-off of the third pipeline;

The first switching device is arranged on at least one of the first pipeline and the second pipeline and is used for controlling the on-off of the pipeline where the first switching device is arranged;

The controller is respectively electrically connected with the throttling mechanism and the compressor, and is used for: and responding to a shutdown instruction, controlling the throttle mechanism to be closed, and controlling the compressor to continue to operate so as to disconnect the third pipeline, wherein the first pipeline is communicated along the direction from the exhaust port to the first port, and the second pipeline is communicated along the direction from the third port to the suction port, so that at least part of the refrigerant in the indoor heat exchanger can migrate to the outdoor heat exchanger, or at least part of the refrigerant in the outdoor heat exchanger can migrate to the indoor heat exchanger.

2. The air conditioner according to claim 1,

The first switching device includes a check valve that is in one-way communication in a direction from the exhaust port to the first port in a case where the check valve is provided on the first pipeline, and is in one-way communication in a direction from the third port to the suction port in a case where the check valve is provided on the second pipeline.

3. the air conditioner according to claim 1 or 2,

The throttling mechanism comprises a cut-off throttling mechanism which can be cut off.

4. The air conditioner according to claim 3,

the stop throttling mechanism comprises an electronic expansion valve.

5. The air conditioner according to claim 1 or 2,

The throttling mechanism comprises a throttling mechanism body and a second switching device which are connected in series, the third pipeline is divided into a first sub-pipeline and a second sub-pipeline by the throttling mechanism body, the second switching device is arranged on the first sub-pipeline, the second switching device is electrically connected with the controller so as to enable the first sub-pipeline to be connected or disconnected by receiving a control signal sent by the controller, or the second switching device is arranged on the second sub-pipeline, and the second switching device is electrically connected with the controller so as to enable the second sub-pipeline to be connected or disconnected by receiving the control signal sent by the controller.

6. The air conditioner according to claim 5,

the second switch device comprises a second one-way electromagnetic stop valve or a second two-way electromagnetic stop valve.

7. The air conditioner according to claim 5,

The throttle mechanism body comprises a capillary tube, a throttle valve, an electronic expansion valve or a thermal expansion valve.

8. A control method for controlling the air conditioner according to any one of claims 1 to 7, characterized by comprising:

Responding to a shutdown instruction, controlling the throttle mechanism to be closed, controlling the compressor to continue to operate, so that the third pipeline is disconnected, and the first pipeline is conducted in a one-way mode along the direction from the exhaust port to the first port and/or the second pipeline is conducted in a one-way mode along the direction from the third port to the suction port, so that at least part of refrigerant in the indoor heat exchanger can be transferred to the outdoor heat exchanger, or at least part of refrigerant in the outdoor heat exchanger can be transferred to the indoor heat exchanger;

The second end of the outdoor heat exchanger and the second end of the indoor heat exchanger are connected through the third pipeline, the first port is connected with the exhaust port through the first pipeline, and the third port is connected with the suction port through the second pipeline.

9. The control method according to claim 8, wherein after controlling the throttle mechanism to close and the compressor to continue operating in response to the shutdown command, the method further comprises:

Detecting working condition parameters of the air conditioner;

And controlling the compressor to stop running when the working condition parameters meet preset conditions.

10. The control method according to claim 9,

The working condition parameters meet preset conditions, and the method specifically comprises the following steps: the air conditioner is shut down when running in a refrigeration mode, and any one of the continuous running time of the compressor is longer than a first preset time, the suction pressure of the compressor is lower than a first preset pressure, and the suction temperature of the compressor is lower than a first preset temperature;

The air conditioner is shut down when running in a heating mode, and any one of the continuous running time of the compressor is longer than a second preset time, the suction pressure of the compressor is lower than a second preset pressure, and the suction temperature of the compressor is lower than a second preset temperature;

The first preset time is equal to or different from the second preset time, the first preset pressure is equal to or different from the second preset pressure, and the first preset temperature is equal to or different from the second preset temperature.

11. the control method according to claim 10,

The range of the first preset time and the second preset time is 10-120 s, the range of the first preset pressure and the second preset pressure is 0-0.6 MPa, and the range of the first preset temperature and the second preset temperature is-30-0 ℃.

12. The control method according to claim 8,

the throttle mechanism includes throttle mechanism body and the second switching device who establishes ties mutually, respond to the shutdown instruction, control throttle mechanism and close, include: and controlling the second switching device to be closed so as to disconnect the third pipeline.

13. the control method according to any one of claims 8 to 12, characterized by comprising:

And responding to a starting instruction, and controlling the throttle mechanism to be started so as to conduct the third pipeline.

14. The control method according to claim 13,

The throttle mechanism includes throttle mechanism body and the second switching device who establishes ties mutually, respond to start-up instruction, control throttle mechanism opens, include: and controlling the second switch device to be started.

15. A control apparatus, comprising a processor and a memory, the processor being configured to implement the steps of the control method according to any one of claims 8 to 14 when executing a computer program stored in the memory.

16. An air conditioner characterized by comprising the control device according to claim 15.

17. a computer-readable storage medium having stored thereon a computer program (instructions), characterized in that: the computer program (instructions), when executed by a processor, implement the steps of the control method of any one of claims 8 to 14.