WO2022227786A1 - Air conditioning system and control method for air conditioning system - Google Patents

Abstract

An air conditioning system and a control method for the air conditioning system, the air conditioning system comprising: a compressor (1), a reversing assembly (2), an outdoor heat exchange assembly, an indoor heat exchanger (4), a throttling apparatus (5), and a refrigerant branch (6); the compressor (1) has an air suction port and an air discharge port; the reversing assembly (2) comprises first to fourth interfaces, the first interface (21) being connected to the air discharge port (11), and the third interface (23) being connected to the air suction port (12); the outdoor heat exchange assembly comprises an outdoor heat exchanger (3) connected to the second interface (22); the indoor heat exchanger (4) is connected between the fourth interface (24) and the outdoor heat exchanger (3); an inlet of the refrigerant branch (6) is connected to the air discharge port (11), an outlet thereof is connected to the air suction port (12), and the refrigerant branch (6) is provided with a first heat exchange apparatus (71).

Description

Air conditioning system and control method of air conditioning system

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202110481116.1 and the filing date of April 30, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

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

Background technique

After the heat pump air conditioner disclosed in the related art operates in a low temperature environment for heating for a period of time, the outdoor heat exchanger is often severely frosted. It is necessary to turn on the electric heating element of the chassis to heat the water flowing down from the defrosting, so as to avoid the accumulation of moisture in the chassis and break the fan blades of the outdoor unit. Although the electric heating element can be used to heat the defrosted snow water, the use cost of the electric heating element is high, which is not conducive to saving energy.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present application is to propose an air-conditioning system, which can prevent the chassis from freezing and has a low cost.

The second objective of the present application is to provide a control method of an air conditioning system.

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

An air conditioning system according to an embodiment of the first aspect of the present application includes: a compressor, the compressor has a suction port and an exhaust port; a reversing component, the reversing component includes a first interface, a second interface, a third interface an interface and a fourth interface, the first interface is connected with the exhaust port, and the third interface is connected with the suction port; an outdoor heat exchange assembly, the outdoor heat exchange assembly includes an outdoor heat exchanger and a chassis , the outdoor heat exchanger is arranged on the chassis, and one end of the outdoor heat exchanger is connected to the second interface; the indoor heat exchanger, the indoor heat exchanger is connected to the fourth interface and the second interface. between the other ends of the outdoor heat exchanger; a throttling device, the throttling device is connected between the indoor heat exchanger and the outdoor heat exchanger; a refrigerant branch, the inlet of the refrigerant branch is connected to the The exhaust port is connected, the outlet of the refrigerant branch is connected with the suction port, and a first heat exchange device is arranged on the refrigerant branch, and the first heat exchange device is arranged on the chassis.

According to the air-conditioning system of the embodiment of the present application, by setting the refrigerant branch circuit and setting the first heat exchange device on the refrigerant branch circuit, the water on the chassis can be heated by a part of the high-temperature refrigerant compressed by the compressor, so as to prevent the water on the chassis from freezing , so as to prevent ice and snow from blocking the drainage port of the chassis, and prevent the water on the chassis from smashing the fan blades of the outdoor fan. In this way, the power consumption of the air conditioning system can be reduced and energy can be saved while ensuring the heating effect of the air conditioning system.

According to some embodiments of the present application, the inlet of the refrigerant branch circuit includes a first inlet and a second inlet, the first inlet is connected to the second interface, and the second inlet is connected to the fourth interface connected.

According to some embodiments of the present application, a first switch valve is arranged between the first inlet and the first heat exchange device, and a second switch is arranged between the second inlet and the first heat exchange device valve.

In other embodiments of the present application, the inlet of the refrigerant branch is connected between the exhaust port and the first interface.

According to some embodiments of the present application, the air conditioning system further includes a second heat exchange device, the second heat exchange device includes a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path is connected in series Between the first heat exchange device and the suction port, the second heat exchange flow path is connected in series between the indoor heat exchanger and the outdoor heat exchanger.

In some further embodiments of the present application, a branch branch is further included, a first end of the branch branch is connected between the first heat exchange device and the first heat exchange flow path, and the branch branch is The second end of the path is connected between the outdoor heat exchanger and the second heat exchange flow path.

According to some embodiments of the present application, the second end of the branch branch is connected between the outdoor heat exchanger and the throttling device.

According to some embodiments of the present application, a third on-off valve is provided on the branch branch, and a fourth on-off valve is provided between the first end of the branch branch and the first heat exchange flow path.

According to some embodiments of the present application, the first heat exchange device includes a first heat exchange part, a second heat exchange part and a connection part which are oppositely arranged, the first heat exchange part and the second heat exchange part are respectively are connected at both ends of the connecting portion and are arranged opposite to each other.

According to some embodiments of the present application, the air conditioning system further includes an electric heating element, the electric heating element is arranged on the chassis, and the electric heating element is arranged in the first heat exchange part and the second heat exchange part between the departments.

According to the control method of the air conditioning system according to the embodiment of the second aspect of the present application, the control method includes: judging whether the air conditioning system starts the heating operation or enters the defrosting mode; if the air conditioning system starts the heating operation or enters the defrosting mode In frost mode, the current outdoor temperature T is obtained; during the heating operation of the air conditioning system, if the outdoor temperature T is greater than the first preset value T1 and less than the second preset value T2, the refrigerant branch is controlled to be connected; When the air conditioning system enters the defrosting mode, if the outdoor temperature T is greater than a third preset value T3 and less than a fourth preset value T4, the refrigerant branch is controlled to be connected.

According to the control method of the air-conditioning system according to the embodiment of the second aspect of the present application, by setting the refrigerant branch and setting the first heat exchange device on the refrigerant branch, the water on the chassis can be heated by a part of the high-temperature refrigerant compressed by the compressor, avoiding the need for The water on the chassis freezes, so as to prevent ice and snow from blocking the drainage port of the chassis, and prevent the accumulated water on the chassis from breaking the fan blades of the outdoor fan. In this way, the power consumption of the air conditioning system can be reduced and energy can be saved while ensuring the heating effect of the air conditioning system.

A computer-readable storage medium according to an embodiment of the third aspect of the present application stores thereon a control program of an air-conditioning system, and when the control program is executed by a processor, implements the control method according to the above-mentioned embodiments of the present application.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic diagram of an air conditioning system according to a first embodiment of the present application;

2 is a schematic diagram of an air conditioning system according to a second embodiment of the present application;

3 is a partial schematic diagram of a chassis of an air conditioning system according to an embodiment of the present application;

FIG. 4 is a control flowchart of a control method of an air conditioning system according to an embodiment of the present application.

Reference number:

100. Air conditioning system;

1. Compressor; 11. Exhaust port; 12. Suction port;

2. Reversing assembly; 21. First interface; 22. Second interface; 23. Third interface; 24. Fourth interface;

3. Outdoor heat exchanger;

4. Indoor heat exchanger;

5. Throttle device;

6, refrigerant branch; 61, inlet; 611, first inlet; 612, second inlet; 62, diversion branch;

71, the first heat exchange device; 711, the first heat exchange part; 712, the second heat exchange part; 713, the connecting part; 72, the second heat exchange device;

8. Chassis; 81. Electric heating element;

91, the first switch valve; 92, the second switch valve; 93, the third switch valve; 94, the fourth switch valve; 95, the fifth switch valve.

Detailed ways

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, but should not be construed as a limitation on the present application.

The air conditioning system 100 according to the embodiment of the present application will be described below with reference to the accompanying drawings.

As shown in FIG. 1 , an air conditioning system 100 according to an embodiment of the first aspect of the present application includes: a compressor 1 , a reversing component 2 , an outdoor heat exchange component, an indoor heat exchanger 4 , a throttling device 5 and a refrigerant branch 6 .

Specifically, the compressor 1 has a suction port 12 and a discharge port 11 . Optionally, the compressor 1 may be a vertical compressor 1 , as shown in FIG. 1 . In the following description of the present application, the compressor 1 is taken as an example of a vertical compressor 1 for illustration. Of course, those skilled in the art can understand that the compressor 1 may also be a horizontal compressor 1 (not shown in the figure). Here, it should be noted that the “vertical compressor 1 ” can be understood as a compressor 1 in which the central axis of the cylinder of the compressor 1 mechanism of the compressor 1 is perpendicular to the installation surface of the compressor 1 . Accordingly, “horizontal compressor 1 ” can be understood as a compressor 1 in which the central axis of the cylinder is substantially parallel to the installation surface of the compressor 1 .

As shown in FIG. 1 , the compressor 1 includes a suction port 12 and a discharge port 11 , wherein the discharge port 11 may be formed at the top of the compressor 1 . The suction port 12 may be formed on the side wall of the compressor 1 . Further, the compressor 1 may further include a gas-liquid separator, and the gas-liquid separator is connected to the suction port 12 to prevent liquid hammer from occurring in the compressor 1 , thereby improving the reliability of the compressor 1 .

The reversing assembly 2 includes a first interface 21 , a second interface 22 , a third interface 23 and a fourth interface 24 . Optionally, the reversing assembly 2 is a four-way valve. The first interface 21 may be connected to the exhaust port 11 , and the third interface 23 may be connected to the suction port 12 . The outdoor heat exchange assembly includes an outdoor heat exchanger 3 and a chassis 8. The outdoor heat exchanger 3 is arranged on the chassis 8. One end of the outdoor heat exchanger 3 (for example, the left end of the outdoor heat exchanger 3 in FIG. 1) is connected to the second interface 22. The indoor heat exchanger 4 is connected between the fourth interface 24 and the other end of the outdoor heat exchanger 3 (for example, the right end of the outdoor heat exchanger 3 in FIG. 1 ). The expansion device 5 is provided between the outdoor heat exchanger 3 and the indoor heat exchanger 4 . Optionally, the throttling device 5 may be a capillary tube, an electronic expansion valve or the like.

Wherein, the first interface 21 can be in reverse communication with one of the second interface 22 and the fourth interface 24 , and the third interface 23 can be in reverse communication with the other of the second interface 22 and the fourth interface 24 . For example, when the first interface 21 communicates with the second interface 22 , the third interface 23 communicates with the fourth interface 24 ; when the first interface 21 communicates with the fourth interface 24 , the third interface 23 communicates with the second interface 22 . Therefore, the switching of the air conditioning system 100 between different working modes can be conveniently realized through the reversing assembly 2 . For example, the switching of the flow direction of the refrigerant can be realized through the reversing component 2, and then the switching between the cooling mode and the heating mode of the air conditioning system 100 can be realized.

For example, when the air conditioning system 100 operates in the cooling mode, the first interface 21 of the reversing assembly 2 can be communicated with the fourth interface 24 , and the third interface 23 can be communicated with the second interface 22 . In the cooling mode, the refrigerant can pass through the exhaust port 11 of the compressor 1, the first interface 21, the fourth interface 24 of the reversing component 2, the outdoor heat exchanger 3, the throttling device 5, the indoor heat exchanger 4, the exchange The second port 22 of the reversing assembly 2, the third port 23 of the reversing assembly 2, and finally return to the compressor 1 from the suction port 12 of the compressor 1, and so on. At this time, the indoor heat exchanger 4 is an evaporator, and the outdoor heat exchanger 3 is a condenser. When the refrigerant flows through the indoor heat exchanger 4, it exchanges heat with the air and absorbs the heat in the air, so as to achieve the purpose of refrigeration.

When the air conditioning system 100 operates in the heating mode, the flow direction of the refrigerant can be switched through the reversing assembly 2 . In the heating mode, the refrigerant passes through the exhaust port 11 of the compressor 1, the first port 21 of the reversing assembly 2, the second port 22 of the reversing assembly 2, the indoor heat exchanger 4, the throttling device 5, and the outdoor heat exchanger. The heater 3, the fourth port 24 of the reversing assembly 2, the third port 23 of the reversing assembly 2, and finally return to the compressor 1 from the suction port 12 of the compressor 1, and so on. At this time, the outdoor heat exchanger 3 is an evaporator, and the indoor heat exchanger 4 is a condenser. When the refrigerant flows through the indoor heat exchanger 4, it exchanges heat with the air and releases heat into the air, so as to achieve the purpose of heating.

The inlet 61 of the refrigerant branch 6 is connected to the exhaust port 11, and the outlet of the refrigerant branch 6 is connected to the suction port 12. The refrigerant branch 6 is provided with a first heat exchange device 71, and the first heat exchange device 71 is arranged on the chassis. 8 on. When the refrigerant branch 6 is connected, the high-temperature refrigerant compressed by the compressor 1 can enter the refrigerant branch 6 through the exhaust port 11, and after the high-temperature refrigerant enters the first heat exchange device 71, it can heat the chassis 8 to avoid the The water freezes, so as to prevent ice and snow from blocking the drainage port of the chassis 8, thereby preventing the water accumulated on the chassis 8 from smashing the fan blades of the outdoor fan. The refrigerant after heat exchange in the first heat exchange device 71 enters the compressor 1 for compression through the suction port 12 of the compressor 1 .

For example, in some embodiments of the present application, when the air-conditioning system 100 operates in the heating mode, the refrigerant branch 6 can be controlled to communicate, and at this time, a part of the high-temperature refrigerant compressed by the compressor 1 enters the indoor heat exchanger 4 for heat exchange, The refrigerant after heat exchange in the indoor heat exchanger 4 passes through the throttling device 5 and enters the outdoor heat exchanger 3 for heat exchange, and the refrigerant after heat exchange in the outdoor heat exchanger 3 enters the compression through the suction port 12 of the compressor 1. Compression in machine 1. At the same time, another part of the high-temperature refrigerant compressed by the compressor 1 can enter the first heat exchange device 71 through the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant to prevent the water on the chassis 8 from freezing, thereby avoiding ice and snow. Wait until the drain port of the chassis 8 is blocked, so as to prevent the water accumulated on the chassis 8 from breaking the fan blades of the outdoor fan. The refrigerant after heat exchange in the first heat exchange device 71 enters the compressor 1 through the suction port 12 of the compressor 1 for compression.

When the air-conditioning system 100 operates in the defrosting mode, the refrigerant branch 6 can be controlled to be connected. At this time, a part of the high-temperature refrigerant compressed by the compressor 1 enters the outdoor heat exchanger 3 for heat exchange, and the refrigerant after heat exchange through the outdoor heat exchanger 3 After passing through the throttling device 5, it enters the indoor heat exchanger 4 for heat exchange, and the refrigerant after heat exchange through the indoor heat exchanger 4 enters the compressor 1 through the suction port 12 of the compressor 1 for compression. At the same time, another part of the high-temperature refrigerant compressed by the compressor 1 can enter the first heat exchange device 71 through the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant to prevent the water on the chassis 8 from freezing, thereby avoiding ice and snow. Wait until the drain port of the chassis 8 is blocked, so as to prevent the water accumulated on the chassis 8 from breaking the fan blades of the outdoor fan. The refrigerant after heat exchange in the first heat exchange device 71 enters the compressor 1 through the suction port 12 of the compressor 1 for compression.

Therefore, by setting the refrigerant branch 6 and setting the first heat exchange device 71 on the refrigerant branch 6, the water on the chassis 8 can be heated by a part of the high-temperature refrigerant compressed by the compressor 1, so as to avoid water condensation on the chassis 8 Therefore, ice and snow can be prevented from blocking the drainage port of the chassis 8, thereby preventing the water on the chassis 8 from breaking the fan blades of the outdoor fan, reducing the power consumption of the air conditioning system 100, and effectively saving energy.

For example, in some specific embodiments of the present application, when the air-conditioning system 100 operates in the heating mode, the outdoor temperature T can be obtained, and when the outdoor temperature T is greater than the first preset value T1 and less than the second preset value T2, the outdoor temperature T can be obtained. Open the refrigerant branch 6 so that another part of the high-temperature refrigerant compressed by the compressor 1 can enter the first heat exchange device 71 through the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant to prevent the water on the chassis 8 from freezing. It is possible to prevent ice and snow from blocking the drainage port of the chassis 8, thereby preventing the accumulated water on the chassis 8 from breaking the fan blades of the outdoor fan. Thus, energy can be saved while ensuring the heating effect of the air conditioning system 100 .

Optionally, the first preset value T1 may be 0-3°C, and the second preset value T2 may be 5-10°C. For example, the first preset value T1 may be 3°C, and the second preset value may be 7°C. In some embodiments of the present application, when the air conditioning system 100 is operating in the heating mode, when 3°C<T<7°C, the refrigerant branch 6 can be opened, so that part of the refrigerant enters the first heat exchange device 71 to heat the chassis 8 .

In some specific embodiments of the present application, when the air conditioning system 100 operates in the defrosting mode, the outdoor temperature T can be obtained, and when the outdoor temperature T is greater than the first preset value T3 and less than the second preset value T4, the refrigerant can be turned on Branch 6, so that another part of the high-temperature refrigerant compressed by the compressor 1 can enter the first heat exchange device 71 through the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant to prevent the water on the chassis 8 from freezing. Ice and snow block the drainage port of the chassis 8, thereby preventing the water accumulated on the chassis 8 from breaking the fan blades of the outdoor fan. Thus, energy can be saved while ensuring the heating effect of the air conditioning system 100 .

Optionally, the third preset value T3 may be -3 to 0°C, and the fourth preset value T4 may be 0 to 5°C. For example, the third preset value T1 may be 0°C, and the second preset value may be 3°C. In some embodiments of the present application, when the air conditioning system 100 operates in the heating mode, when 0° C.<T<3° C., the refrigerant branch 6 can be opened, so that part of the refrigerant enters the first heat exchange device 71 to heat the chassis 8 , to prevent the melted water from freezing until the defrosting action is complete.

According to the air conditioning system 100 of the embodiment of the present application, by setting the refrigerant branch circuit 6 and setting the first heat exchange device 71 on the refrigerant branch circuit 6, the water on the chassis 8 can be heated by a part of the high temperature refrigerant compressed by the compressor 1, The water on the chassis 8 is prevented from freezing, so that ice and snow can be prevented from blocking the drainage port of the chassis 8, and the accumulated water on the chassis 8 can be prevented from breaking the fan blades of the outdoor fan. In this way, while ensuring the heating effect of the air conditioning system 100 , the power consumption of the air conditioning system 100 can be reduced, and energy can be saved.

According to some embodiments of the present application, the inlet 61 of the refrigerant branch 6 includes a first inlet 611 and a second inlet 612 , the first inlet 611 is connected to the second port 22 , and the second inlet 612 is connected to the fourth port 24 . When the air conditioning system 100 operates in the heating mode, the first port 21 of the reversing assembly 2 is communicated with the fourth port 24 , and part of the high-temperature refrigerant can enter the refrigerant branch 6 through the fourth port 24 . When the air conditioning system 100 operates in the defrosting mode, the first port 21 of the reversing assembly 2 is communicated with the second port 22 , and part of the high-temperature refrigerant can enter the refrigerant branch 6 through the second port 22 . Therefore, when the air conditioning system 100 operates in the heating mode and the defrosting mode, part of the high-temperature refrigerant can enter the refrigerant branch 6 to heat the chassis 8 through the high-temperature refrigerant.

Further, a first on-off valve 91 may be provided between the first inlet 611 and the first heat exchange device 71 . Optionally, the first switch valve 91 may be a solenoid valve. When the first switch valve 91 is opened, the first inlet 611 communicates with the second port 22 . When the first port 21 and the second port 22 of the reversing assembly 2 communicate with each other, the refrigerant can enter the refrigerant branch 6 . When the first on-off valve 91 is closed, the first inlet 611 is disconnected from the second port 22 , and the refrigerant cannot enter the refrigerant branch 6 at this time. For example, in the defrosting mode, whether it is necessary to open the first on-off valve 91 may be determined according to the outdoor temperature.

A second on-off valve 92 may be provided between the second inlet 612 and the first heat exchange device 71 . Optionally, the second switch valve 92 may be a solenoid valve. When the second on-off valve 92 is opened, when the first port 21 of the reversing assembly 2 communicates with the fourth port 24 , the refrigerant can enter the refrigerant branch 6 . When the second on-off valve 92 is closed, the second inlet 612 is disconnected from the fourth port 24 , and the refrigerant cannot enter the refrigerant branch 6 at this time. For example, in the heating mode, it may be determined whether the second on-off valve 92 needs to be opened according to the outdoor temperature.

Therefore, by arranging the first on-off valve 91 and the second on-off valve 92 , the on-off of the refrigerant branch 6 can be controlled according to the actual operating conditions, thereby optimizing the performance of the air conditioning system 100 .

It can be understood that, in other embodiments of the present application, referring to FIG. 2 , the inlet 61 of the refrigerant branch 6 may also be connected between the exhaust port 11 and the first interface 21 of the reversing assembly 2 . In this way, when the refrigerant branch 6 is connected, part of the refrigerant discharged from the exhaust port 11 can enter the reversing assembly 2 , and another part of the refrigerant can enter the refrigerant branch 6 . Therefore, when the air conditioning system 100 operates in the heating mode and the defrosting mode, part of the high-temperature refrigerant can also enter the refrigerant branch 6 to heat the chassis 8 through the high-temperature refrigerant.

Further, a fifth on-off valve 95 may be provided at the inlet 61 of the refrigerant branch 6 . Optionally, the fifth switch valve 95 is a solenoid valve.

According to some embodiments of the present application, the air conditioning system 100 further includes a second heat exchange device 72, the second heat exchange device 72 includes a first heat exchange flow path and a second heat exchange flow path, and the first heat exchange flow path is connected in series with the first heat exchange flow path. Between the first heat exchange device 71 and the suction port 12 , the second heat exchange flow path is connected in series between the indoor heat exchanger 4 and the outdoor heat exchanger 3 . That is, the refrigerant flowing out of the first heat exchange device 71 can enter the first heat exchange flow path and flow to the intake port 12 . The refrigerant flowing out from the indoor heat exchanger 4 can enter the second heat exchange flow path and flow to the outdoor heat exchanger 3, or the refrigerant flowing out from the outdoor heat exchanger 3 can immediately enter the second heat exchange flow path and flow to the indoor heat exchanger 4.

1 and 2 , in the heating mode, when the refrigerant branch 6 is opened, the refrigerant flowing from the first heat exchange device 71 can flow to the first heat exchange flow path, and the refrigerant flowing from the indoor heat exchanger 4 It can flow to the second heat exchange flow path. After the refrigerant in the first heat exchange flow path and the refrigerant in the second heat exchange flow path exchange heat in the second heat exchange device 72, the refrigerant in the first heat exchange flow path can be Flowing to the suction port 12 of the compressor 1, the refrigerant in the second heat exchange flow path can be throttled by the first throttling device 5, and then enters the outdoor heat exchanger 3 and flows to the suction port 12 of the compressor 1 after heat exchange. . In this way, on the one hand, after the refrigerant flowing out of the first heat exchange device 71 is exchanged in the second heat exchange device 72, it can absorb heat and increase the temperature, thereby increasing the temperature of the refrigerant return air. On the other hand, the temperature of the refrigerant flowing out of the indoor heat exchanger 4 is lowered after heat exchange in the second heat exchange device 72, and more heat can be obtained in the outdoor heat exchanger 3, which is beneficial to improve the heating effect.

According to some embodiments of the present application, the refrigerant branch 6 further includes a branch branch 62 , and the first end of the branch branch 62 is connected between the first heat exchange device 71 and the first heat exchange flow path. The second end is connected between the outdoor heat exchanger 3 and the indoor heat exchanger 4 . When the branch branch 62 is opened, the refrigerant flowing out from the first heat exchange device 71 can enter the indoor heat exchanger 4 for heat exchange.

For example, when the air-conditioning system 100 operates in the defrosting mode, the refrigerant after heat exchange in the first heat exchange device 71 can enter the indoor heat exchanger 4 for heat exchange and then flow to the suction port 12, which is beneficial to improve the return air of the refrigerant temperature.

In some embodiments of the present application, the second end of the branch branch 62 may be connected between the outdoor heat exchanger 3 and the throttling device 5 . When the air-conditioning system 100 operates in the defrosting mode, the refrigerant after heat exchange in the first heat exchange device 71 is first throttled by the throttle device 5, and then enters the indoor heat exchanger 4 and flows to the intake port 12 after heat exchange. This is beneficial to increase the return air temperature of the refrigerant.

According to some embodiments of the present application, the branch branch 62 is provided with a third switch valve 93 , and the third switch valve 93 can open or close the branch branch 62 . Optionally, the third switch valve 93 is a solenoid valve. A fourth on-off valve 94 is provided between the first end of the branch branch 62 and the first heat exchange flow path. Optionally, the fourth switch valve 94 is a solenoid valve. When the fourth on-off valve 94 is opened, the refrigerant flowing out of the first heat exchange device 71 can flow to the intake port 12 through the first heat exchange flow path. When the fourth on-off valve 94 is closed, the refrigerant flowing out from the first heat exchange device 71 can flow to the indoor heat exchanger 4 through the branch branch 62 , and then flow to the suction port 12 .

For example, when the air conditioning system 100 is in heating operation, the fourth on-off valve 94 may be opened, and the third on-off valve 93 may be closed. When the air conditioning system 100 operates the defrosting mode, the third switching valve 93 may be opened and the fourth switching valve 94 may be closed. In this way, the flow direction of the refrigerant in the refrigerant branch circuit 6 can be controlled according to the actual operation of the air conditioning system 100 , which is beneficial to optimize the performance of the air conditioning system 100 .

According to some embodiments of the present application, the air conditioning system 100 further includes an electric heating element 81 , as shown in FIG. 3 , the electric heating element 81 is provided on the chassis 8 . The electric heating element 81 can be used for auxiliary heating of the chassis 8 to avoid heating of the chassis 8 .

For example, when the outdoor temperature is low and enough heat is provided by the refrigerant in the refrigerant branch 6 to melt the ice and snow on the chassis 8, the electric heating element 81 can be turned on, and the electric heating element 81 can be used to heat the chassis 8 to avoid the The water freezes, so as to prevent ice and snow from blocking the drainage port of the chassis 8. In this way, different heating modes can be selected according to actual needs, which saves energy while ensuring the heating effect of the air conditioning system 100 .

According to some embodiments of the present application, the first heat exchange device 71 includes a first heat exchange part 711 , a second heat exchange part 712 and a connecting part 713 which are oppositely arranged, and the first heat exchange part 711 and the second heat exchange part 712 are respectively Both ends of the connecting portion 713 are connected and disposed opposite to each other. Optionally, the electric heating element 81 is disposed between the first heat exchange part 711 and the second heat exchange part 712 . In this way, the arrangement of the first heat exchange device 71 and the electric heating element 81 can be made more compact, which is beneficial to reduce the overall occupied space of the first heat exchange device 71 and the electric heating element 81, so that the arrangement of the components on the chassis 8 is facilitated. cloth is more reasonable.

Optionally, the first heat exchange device 71 may be a U-shaped heat exchange tube. The U-shaped tube heat exchanger has a large heat exchange area, simple and compact structure and high sealing performance. It is not only easy to install, but also convenient for later maintenance and cleaning.

FIG. 4 shows a control flowchart of the control method of the air conditioning system 100 according to the embodiment of the present application.

As shown in FIG. 4 , the control method of the air conditioning system 100 according to the embodiment of the second aspect of the present application includes:

Determining whether the air conditioning system 100 is turned on for heating operation or whether it enters the defrosting mode;

If the air-conditioning system 100 starts the heating operation or enters the defrosting mode, obtain the current outdoor temperature T;

During the heating operation of the air conditioning system 100, if the outdoor temperature T is greater than the first preset value T1 and less than the second preset value T2, the refrigerant branch 6 is controlled to be connected;

When the air conditioning system 100 enters the defrosting mode, if the outdoor temperature T is greater than the third preset value T3 and less than the fourth preset value T4, the refrigerant branch 6 is controlled to be connected.

In the heating mode, when the outdoor temperature T satisfies T1<T<T2, the refrigerant branch 6 can be controlled to open. At this time, a part of the high-temperature refrigerant compressed by the compressor 1 enters the indoor heat exchanger 4 for heat exchange, and the indoor exchange The refrigerant after heat exchange in the heat exchanger 4 enters the outdoor heat exchanger 3 for heat exchange through the first throttling device 5, and the refrigerant after heat exchange in the outdoor heat exchanger 3 enters the compressor through the suction port 12 of the compressor 1. 1 compression. At the same time, another part of the high-temperature refrigerant compressed by the compressor 1 can enter the first heat exchange device 71 through the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant to prevent the water on the chassis 8 from freezing, thereby avoiding ice and snow. After the drain port of the chassis 8 is blocked, the refrigerant after heat exchange in the first heat exchange device 71 enters the compressor 1 through the suction port 12 of the compressor 1 for compression.

In this way, the water on the chassis 8 can be heated by a part of the high-temperature refrigerant compressed by the compressor 1 to prevent the water on the chassis 8 from freezing, thereby preventing ice and snow from blocking the drainage port of the chassis 8 .

For example, in some examples of the present application, the first preset value T1 may be 0-3°C, and the second preset value T2 may be 5-10°C. For example, the first preset value T1 may be 3°C, and the second preset value may be 7°C. In some embodiments of the present application, when the air conditioning system 100 is operating in the heating mode, when 3°C<T<7°C, the refrigerant branch 6 can be opened, so that part of the refrigerant enters the first heat exchange device 71 to heat the chassis 8 .

The third preset value T3 may be -3-0°C, and the fourth preset value T4 may be 0-5°C. For example, the third preset value T1 may be 0°C, and the second preset value may be 3°C. In some embodiments of the present application, when the air conditioning system 100 operates in the heating mode, when 0° C.<T<3° C., the refrigerant branch 6 can be opened, so that part of the refrigerant enters the first heat exchange device 71 to heat the chassis 8 , to prevent the melted water from freezing until the defrosting action is complete.

According to the control method of the air conditioning system 100 according to the embodiment of the second aspect of the present application, by setting the refrigerant branch circuit 6 and setting the first heat exchange device 71 on the refrigerant branch circuit 6, a part of the high temperature refrigerant compressed by the compressor 1 can be heated The water on the chassis 8 can prevent the water on the chassis 8 from freezing, so as to prevent ice and snow from blocking the drainage port of the chassis 8, and prevent the water on the chassis 8 from breaking the fan blades of the outdoor fan. In this way, while ensuring the heating effect of the air conditioning system 100 , the power consumption of the air conditioning system 100 can be reduced, and energy can be saved.

According to some embodiments of the present application, when the air-conditioning system 100 operates in the heating mode, when the outdoor temperature T is greater than or equal to the second preset value T2, the outdoor temperature T is relatively high, the air-conditioning system basically does not freeze and has a heating capacity. It can be fully guaranteed that the refrigerant branch circuit 6 can be closed at this time. It can be understood that when the chassis 8 is provided with the electric heating element 81, when the air conditioning system 100 operates in the heating mode, when the outdoor temperature T is greater than or equal to the second preset value T2, the electric heating element 81 is also turned off. Thus, the power consumption can be reduced while ensuring the heating capacity of the air conditioning system 100 .

Further, when the electric heating element 81 is provided on the chassis 8, when the air-conditioning system 100 operates in the defrosting mode, when the outdoor temperature T is less than or equal to the first preset value T1, the electric heating element 81 can be turned on, and the electric heating element 81 can be turned on through the electric heating element. The 81 heats the chassis 8 to prevent the water on the chassis 8 from freezing, thereby preventing ice and snow from blocking the drainage port of the chassis 8 .

For example, in the defrosting mode, when the outdoor temperature is less than or equal to 0°C, the electric heating element 81 can be turned on, and the electric heating element 81 can be used to heat the chassis 8 to prevent the water on the chassis 8 from freezing, thereby preventing ice and snow from blocking. Drain of chassis 8.

In some further embodiments of the present application, after the electric heating element 81 is turned on, the output power of the electric heating element 81 can be adjusted according to the outdoor temperature T, so that the chassis 8 does not freeze while saving energy.

For example, in some embodiments of the present application, when T≤-15°C, the refrigerant branch 6 can be turned off, and the electric heating element 81 can be controlled to operate at the maximum power W1 until the defrosting operation ends. Make sure that the water droplets defrosted on the chassis 8 can remove the chassis 8 in time to prevent it from freezing and breaking the fan blades.

When -15°C<T≤-8°C, the refrigerant branch circuit 6 can be closed, and the electric heating element 81 can be controlled to operate with the power W2 until the defrosting operation is completed. where W1>W2. The power consumption of the electric heating element 81 is reduced and the electric energy is saved while ensuring that the water droplets that are defrosted on the chassis 8 are removed in time.

When -8°C<T≤-2°C, the refrigerant branch circuit 6 can be closed, and the electric heating element 81 can be controlled to operate with the power W3 until the defrosting operation is completed. where W1>W2>W3. The power consumption of the electric heating element 81 is reduced while the water droplet removal efficiency of the defrosting of the chassis 8 is ensured, thereby further saving electric energy.

When -2°C<T≤0°C, the refrigerant branch circuit 6 can be closed, and the electric heating element 81 can be controlled to operate with the power W3 until the defrosting operation is completed. where W1>W2>W3>W4. The power consumption of the electric heating tube is reduced while the water droplet removal efficiency of the defrosting of the chassis 8 is ensured, and the electric energy is further saved.

The following describes the air conditioning system 100 and the control method of the air conditioning system 100 according to specific embodiments of the present application with reference to the accompanying drawings.

Example 1:

As shown in FIG. 1 , the air conditioning system 100 includes: a compressor 1 , a reversing component 2 , an outdoor heat exchange component, an indoor heat exchanger 4 , a throttle device 5 , a refrigerant branch 6 and a second heat exchange device 72 .

The compressor 1 has an intake port 12 and an exhaust port 11 . The reversing assembly 2 includes a first interface 21 , a second interface 22 , a third interface 23 and a fourth interface 24 . The first port 21 may be connected to the exhaust port 11 , and the third port 23 may be connected to the suction port 12 . The outdoor heat exchange assembly includes an outdoor heat exchanger 3 and a chassis 8. The outdoor heat exchanger 3 is arranged on the chassis 8. One end of the outdoor heat exchanger 3 (for example, the left end of the outdoor heat exchanger 3 in FIG. 1) is connected to the second interface 22. The indoor heat exchanger 4 is connected between the fourth interface 24 and the other end of the outdoor heat exchanger 3 (for example, the right end of the outdoor heat exchanger 3 in FIG. 1 ). The expansion device 5 is provided between the outdoor heat exchanger 3 and the indoor heat exchanger 4 .

The inlet 61 of the refrigerant branch 6 includes a first inlet 611 and a second inlet 612 , the first inlet 611 is connected to the second port 22 , and the second inlet 612 is connected to the fourth port 24 . The outlet of the refrigerant branch 6 is connected to the suction port 12 . The refrigerant branch 6 is provided with a first heat exchange device 71 , and the first heat exchange device 71 is arranged on the chassis 8 . A first on-off valve 91 may be provided between the first inlet 611 and the first heat exchange device 71 . A second on-off valve 92 may be provided between the second inlet 612 and the first heat exchange device 71 .

The second heat exchange device 72 includes a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path is connected in series between the first heat exchange device 71 and the suction port 12, and the second heat exchange flow path is connected in series between the indoor heat exchanger 4 and the outdoor heat exchanger 3 . The refrigerant branch 6 also includes a branch branch 62, the first end of the branch branch 62 is connected between the first heat exchange device 71 and the first heat exchange flow path, and the second end of the branch branch 62 is connected to the outdoor heat exchange. between the heat exchanger 3 and the indoor heat exchanger 4. A third on-off valve 93 is provided on the branch branch 62 . A fourth on-off valve 94 is provided between the first end of the branch branch 62 and the first heat exchange flow path.

The control method of the air conditioning system 100 in this embodiment may be:

Determining whether the air conditioning system 100 is turned on for heating operation or whether it enters the defrosting mode;

If the air-conditioning system 100 starts the heating operation or enters the defrosting mode, obtain the current outdoor temperature T;

During the heating operation of the air conditioning system 100, if the outdoor temperature T is greater than the first preset value T1 and less than the second preset value T2, the second on-off valve 92 and the fourth on-off valve 94 are opened, and the first on-off valve 91 and the first on-off valve 91 are closed. Three on-off valve 93;

When the air conditioning system 100 enters the defrosting mode, if the outdoor temperature T is greater than the third preset value T3 and less than the fourth preset value T4, the second on-off valve 92 and the fourth on-off valve 94 are closed, and the first on-off valve 91 and the fourth on-off valve 94 are opened. The third on-off valve 93 .

Embodiment 2:

As shown in FIG. 2 , the structure of the air conditioning system 100 in the second embodiment is basically the same as that of the air conditioning system 100 in the first embodiment, the only difference is that the inlet 61 of the refrigerant branch 6 in this embodiment is connected to the exhaust gas between the port 11 and the first interface 21 . Other structures of the air conditioning system 100 are the same as those in the first embodiment, and are not repeated here.

Further, the present application discloses a computer-readable storage medium on which a control program of the air-conditioning system 100 is stored, and when the control program is executed by a processor, realizes the control of the air-conditioning system 100 according to the second aspect of the present application. method.

The aforementioned computer-readable storage media may employ any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (Read Only Memory) ; hereinafter referred to as: ROM), erasable programmable read only memory (Erasable Programmable Read Only Memory; hereinafter referred to as: EPROM) or flash memory, optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic memory components, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

A computer-readable signal medium may include a propagated data signal in baseband or as part of a carrier wave, with computer-readable program code embodied thereon. Such propagated data signals may take a variety of forms including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device .

Program code embodied on a computer readable medium may be transmitted using any suitable medium including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out the operations of the present application may be written in one or more programming languages, including object-oriented programming languages—such as Java, Smalltalk, C++, and conventional Procedural programming language - such as the "C" language or similar programming language. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (hereinafter: LAN) or a Wide Area Network (hereinafter: WAN), or it may be Connect to an external computer (eg via the Internet using an Internet Service Provider).

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, Rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation on the application.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms 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.

Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (12)

1. An air conditioning system, comprising:

   a compressor, the compressor has a suction port and a discharge port;

   A reversing assembly, the reversing assembly includes a first interface, a second interface, a third interface and a fourth interface, the first interface is connected with the exhaust port, and the third interface is connected with the suction port connected;

   an outdoor heat exchange assembly, the outdoor heat exchange assembly includes an outdoor heat exchanger and a chassis, the outdoor heat exchanger is arranged on the chassis, and one end of the outdoor heat exchanger is connected to the second interface;

   an indoor heat exchanger, the indoor heat exchanger is connected between the fourth interface and the other end of the outdoor heat exchanger;

   a throttling device, the throttling device is connected between the indoor heat exchanger and the outdoor heat exchanger;

   A refrigerant branch, the inlet of the refrigerant branch is connected to the exhaust port, the outlet of the refrigerant branch is connected to the suction port, the refrigerant branch is provided with a first heat exchange device, and the first heat exchange device is provided on the refrigerant branch. A heat exchange device is arranged on the chassis.
2. The air conditioning system of claim 1, wherein the inlet of the refrigerant branch circuit comprises a first inlet and a second inlet, the first inlet is connected to the second interface, and the second inlet is connected to the second inlet. connected to the fourth interface.
3. The air conditioning system according to claim 2, wherein a first on-off valve is provided between the first inlet and the first heat exchange device, and a first on-off valve is provided between the second inlet and the first heat exchange device There is a second on-off valve.
4. The air conditioning system of claim 1, wherein the inlet of the refrigerant branch is connected between the exhaust port and the first interface.
5. The air conditioning system of claim 1, further comprising a second heat exchange device, the second heat exchange device comprising a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path The second heat exchange flow path is connected in series between the indoor heat exchanger and the outdoor heat exchanger.
6. The air conditioning system of claim 5, wherein the refrigerant branch further comprises a branch branch, and a first end of the branch branch is connected between the first heat exchange device and the first heat exchange flow path , the second end of the branch branch is connected between the outdoor heat exchanger and the indoor heat exchanger.
7. The air conditioning system of claim 6, wherein the second end of the branch branch is connected between the outdoor heat exchanger and the throttling device.
8. The air conditioning system according to claim 6, wherein a third on-off valve is provided on the branch branch, and a fourth on-off valve is provided between the first end of the branch branch and the first heat exchange flow path.
9. The air conditioning system according to any one of claims 1 to 8, further comprising an electric heating element provided on the chassis.
10. The air conditioning system of claim 9, wherein the first heat exchange device comprises a first heat exchange part, a second heat exchange part and a connecting part which are oppositely arranged, the first heat exchange part and the second heat exchange part The heat exchange parts are respectively connected at both ends of the connection parts and arranged opposite to each other, and the electric heating element is arranged between the first heat exchange part and the second heat exchange part.
11. A control method for an air conditioning system according to any one of claims 1-10, wherein the control method comprises:

    judging whether the air-conditioning system starts the heating operation or whether it enters the defrosting mode;

    If the air-conditioning system starts heating operation or enters a defrosting mode, obtain the current outdoor temperature T;

    During the heating operation of the air-conditioning system, if the outdoor temperature T is greater than a first preset value T1 and less than a second preset value T2, controlling the refrigerant branch to communicate;

    When the air conditioning system enters the defrosting mode, if the outdoor temperature T is greater than a third preset value T3 and less than a fourth preset value T4, the refrigerant branch is controlled to be connected.
12. A computer-readable storage medium, wherein a control program of an air-conditioning system is stored thereon, and the control program implements the control method of claim 11 when executed by a processor.

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