CN115264984A

CN115264984A - Air conditioning system and control method thereof

Info

Publication number: CN115264984A
Application number: CN202110481116.1A
Authority: CN
Inventors: 吴杨杨; 刘阳
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Wuhu Meizhi Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Wuhu Meizhi Air Conditioning Equipment Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-11-01
Also published as: WO2022227786A1

Abstract

The invention discloses an air conditioning system and a control method of the air conditioning system, wherein the air conditioning system comprises: the air conditioner comprises a compressor, a reversing component, an outdoor heat exchange component, an indoor heat exchanger, a throttling device and a refrigerant branch, wherein the compressor is provided with an air suction port and an air exhaust port; the reversing component comprises a first interface, a second interface, a third interface and a fourth interface, wherein the first interface is connected with the exhaust port, and the third interface is connected with the air suction port; the outdoor heat exchange assembly comprises 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 with the second interface; the indoor heat exchanger is connected between the fourth interface and the other end of the outdoor heat exchanger; the inlet of the refrigerant branch is connected with the exhaust port, the outlet of the refrigerant branch is connected with the air suction port, the refrigerant branch is provided with a first heat exchange device, and the first heat exchange device is arranged on the chassis. According to the air conditioning system provided by the embodiment of the invention, water on the base plate can be heated by a part of high-temperature refrigerant compressed by the compressor, so that the water on the base plate is prevented from being frozen.

Description

Air conditioning system and control method thereof

Technical Field

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

Background

After the heat pump air conditioner runs for a period of time for heating in a low-temperature environment, the outdoor heat exchanger often frosts seriously, the outdoor heat exchanger needs to be switched to a refrigeration mode for defrosting operation at intervals, and when the temperature is very low, an electric heating element of a chassis is usually required to be opened to heat water flowing down after defrosting, so that more water in the chassis is accumulated, and the blades of the outdoor unit are prevented from being broken. Although the electric heating element can heat the defrosted snow water, the electric heating element has high use cost and is not beneficial to saving energy.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the invention to propose an air conditioning system which avoids icing of the chassis and which is cost-effective.

The second objective of the invention is to provide a control method of the air conditioning system.

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

An air conditioning system according to an embodiment of a first aspect of the present invention includes: a compressor having a suction port and a discharge port; the reversing assembly comprises 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 air suction port; the outdoor heat exchange assembly comprises 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 with the second interface; the indoor heat exchanger is connected between the fourth interface and the other end of the outdoor heat exchanger; a throttling device connected between the indoor heat exchanger and the outdoor heat exchanger; the inlet of the refrigerant branch is connected with the exhaust port, the outlet of the refrigerant branch is connected with the air suction port, and the refrigerant branch is provided with a first heat exchange device which is arranged on the chassis.

According to the air conditioning system provided by the embodiment of the invention, the refrigerant branch is arranged, and the first heat exchange device is arranged on the refrigerant branch, so that water on the chassis can be heated by a part of high-temperature refrigerant compressed by the compressor, and the water on the chassis is prevented from freezing, therefore, ice and snow and the like can be prevented from blocking a water outlet of the chassis, and accumulated water on the chassis is prevented from beating blades of an outdoor fan. Therefore, the heating effect of the air conditioning system can be ensured, the power consumption of the air conditioning system is reduced, and the energy is saved.

According to some embodiments of the invention, the inlet of the refrigerant branch comprises a first inlet and a second inlet, the first inlet is connected to the second port, and the second inlet is connected to the fourth port.

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

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

According to some embodiments of the present invention, the air conditioning system further comprises a second heat exchanging device comprising a first heat exchanging flow path and a second heat exchanging flow path, the first heat exchanging flow path being connected in series between the first heat exchanging device and the suction port, the second heat exchanging flow path being connected in series between the indoor heat exchanger and the outdoor heat exchanger.

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

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

According to some embodiments of the present invention, a third switch valve is disposed on the branch line, and a fourth switch valve is disposed between the first end of the branch line and the first heat exchange flow path.

According to some embodiments of the present invention, the first heat exchanging means includes a first heat exchanging part, a second heat exchanging part, and a connecting part, which are oppositely disposed, and the first heat exchanging part and the second heat exchanging part are respectively connected to both ends of the connecting part and are oppositely disposed from each other.

According to some embodiments of the present invention, the air conditioning system further includes an electric heating member provided on the base pan, the electric heating member being provided between the first heat exchanging part and the second heat exchanging part.

A control method of an air conditioning system according to an embodiment of a second aspect of the present invention includes: judging whether the air-conditioning system starts heating operation or enters a defrosting mode; if the air conditioning system starts heating operation or enters a defrosting mode, acquiring the current outdoor temperature T; when the air conditioning system is in heating operation, 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 be communicated; and when the air conditioning system enters a defrosting mode, if the outdoor temperature T is greater than a third preset value T3 and less than a fourth preset value T4, controlling the refrigerant branch to be communicated.

According to the control method of the air conditioning system in the embodiment of the second aspect of the invention, by arranging the refrigerant branch and arranging the first heat exchange device on the refrigerant branch, water on the chassis can be heated by a part of high-temperature refrigerant compressed by the compressor, and the water on the chassis is prevented from freezing, so that the water outlet of the chassis can be prevented from being blocked by ice, snow and the like, and blades of the outdoor fan can be prevented from being broken by accumulated water on the chassis. Therefore, the heating effect of the air-conditioning system can be ensured, the power consumption of the air-conditioning system is reduced, and the energy is saved.

A computer-readable storage medium according to an embodiment of the third aspect of the present invention has stored thereon a control program of an air conditioning system, which when executed by a processor, implements a control method according to the above-described embodiment of the present invention.

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 diagram of an air conditioning system according to a first embodiment of the present invention;

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

FIG. 3 is a partial schematic view of a base pan of an air conditioning system according to an embodiment of the present invention;

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

Reference numerals:

100. an air conditioning system;

1. a compressor; 11. an exhaust port; 12. an air suction port;

2. a commutation assembly; 21. a first interface; 22. a second interface; 23. a third interface; 24. a fourth interface;

3. an outdoor heat exchanger;

4. an indoor heat exchanger;

5. a throttling device;

6. a refrigerant branch; 61. an inlet; 611. a first inlet; 612. a second inlet; 62. a shunt branch;

71. a first heat exchange means; 711. a first heat exchanging portion; 712. a second heat exchanging part; 713. a connecting portion; 72. a second heat exchange means;

8. a chassis; 81. an electric heating element;

91. a first on-off valve; 92. a second on-off valve; 93. a third on-off valve; 94. a fourth switching valve; 95. and a fifth on-off valve.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

An air conditioning system 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, an air conditioning system 100 according to an embodiment of a first aspect of the present invention includes: the air conditioner comprises a compressor 1, a reversing assembly 2, an outdoor heat exchange assembly, 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. Alternatively, 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 described as a vertical compressor 1 as an example. Of course, it will be understood by those skilled in the art that the compressor 1 may also be a horizontal compressor 1 (not shown). Here, the term "vertical compressor 1" is understood to mean a compressor 1 in which the center axis of the cylinder of the compressor 1 is perpendicular to the mounting surface of the compressor 1. Accordingly, the "horizontal compressor 1" can be understood as a compressor 1 in which the center axis of the cylinder is substantially parallel to the mounting 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 a sidewall of the compressor 1. Further, the compressor 1 may further include a gas-liquid separator connected to the suction port 12 to prevent a liquid hammering phenomenon of the compressor 1, whereby reliability of the compressor 1 may be improved.

The reversing assembly 2 comprises 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 port 21 may be connected to the exhaust port 11, and the third port 23 may be connected to the intake port 12. The outdoor heat exchange assembly comprises 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 with the second connector 22, and the indoor heat exchanger 4 is connected between the fourth connector 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 throttling device 5 is arranged between the outdoor heat exchanger 3 and the indoor heat exchanger 4. Alternatively, the throttling device 5 may be a capillary tube, an electronic expansion valve, or the like.

Wherein, the first interface 21 can be communicated with one of the second interface 22 and the fourth interface 24 in a reversing way, and the third interface 23 can be communicated with the other one of the second interface 22 and the fourth interface 24 in a reversing way. For example, when the first port 21 communicates with the second port 22, the third port 23 communicates with the fourth port 24; when the first port 21 communicates with the fourth port 24, the third port 23 communicates with the second port 22. Therefore, the air conditioning system 100 can be conveniently switched between different operation modes through the reversing assembly 2. For example, the switching module 2 may be used to switch the flow direction of the refrigerant, and thus, the air conditioning system 100 may be switched between a cooling mode and a heating mode.

For example, when the air conditioning system 100 operates in the cooling mode, the first port 21 of the reversing assembly 2 may be communicated with the fourth port 24, and the third port 23 may be communicated with the second port 22. In the cooling mode, the refrigerant may sequentially pass through the exhaust port 11 of the compressor 1, the first port 21, the fourth port 24 of the reversing component 2, the outdoor heat exchanger 3, the throttling device 5, the indoor heat exchanger 4, the second port 22 of the reversing component 2, and the third port 23 of the reversing component 2, and finally return to the compressor 1 from the suction port 12 of the compressor 1, and the process is repeated. In this case, 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, the refrigerant exchanges heat with air to absorb heat in the air, so that the aim of refrigeration is fulfilled.

When the air conditioning system 100 operates in the heating mode, the switching of the refrigerant flow direction can be realized by the reversing assembly 2, the first interface 21 of the reversing assembly 2 is communicated with the second interface 22, and the third interface 23 is communicated with the fourth interface 24. In the heating mode, the refrigerant sequentially passes through the exhaust port 11 of the compressor 1, the first interface 21 of the reversing assembly 2, the second interface 22 of the reversing assembly 2, the indoor heat exchanger 4, the throttling device 5, the outdoor heat exchanger 3, the fourth interface 24 of the reversing assembly 2 and the third interface 23 of the reversing assembly 2, and finally returns to the compressor 1 from the air suction port 12 of the compressor 1, and the cycle is repeated. In this case, 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, the refrigerant exchanges heat with the air and releases heat to the air, so that the purpose of heating is achieved.

An inlet 61 of the refrigerant branch 6 is connected with the exhaust port 11, an outlet of the refrigerant branch 6 is connected with the suction port 12, a first heat exchange device 71 is arranged on the refrigerant branch 6, and the first heat exchange device 71 is arranged on the chassis 8. When the refrigerant branch 6 is communicated, the high-temperature refrigerant compressed by the compressor 1 can enter the refrigerant branch 6 through the exhaust port 11, and after entering the first heat exchange device 71, the high-temperature refrigerant can heat the chassis 8, so that water on the chassis 8 is prevented from freezing, ice and snow and the like can be prevented from blocking a water outlet of the chassis 8, and fan blades of the outdoor fan can be prevented from being broken by accumulated water on the chassis 8. The refrigerant after entering the first heat exchanger 71 for heat exchange enters the compressor 1 through the suction port 12 of the compressor 1 for compression.

For example, in some embodiments of the present invention, when the air conditioning system 100 operates in the heating mode, the refrigerant branch 6 may be controlled to be communicated, 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 by the indoor heat exchanger 4 enters the outdoor heat exchanger 3 for heat exchange after passing through the throttling device 5, and the refrigerant after heat exchange by the outdoor heat exchanger 3 enters the compressor 1 for compression through the suction port 12 of the compressor 1. Meanwhile, the other 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 through the high-temperature refrigerant, so that the water on the chassis 8 is prevented from freezing, ice and snow and the like can be prevented from blocking a water outlet of the chassis 8, and further, accumulated water on the chassis 8 is prevented from beating fan blades of the outdoor fan. The refrigerant having exchanged heat in the first heat exchanger 71 enters the compressor 1 through the suction port 12 of the compressor 1 and is compressed.

When the air conditioning system 100 operates in the defrosting mode, the refrigerant branch 6 can be controlled to be communicated, at this time, a part of high-temperature refrigerant compressed by the compressor 1 enters the outdoor heat exchanger 3 for heat exchange, the refrigerant subjected to heat exchange by the outdoor heat exchanger 3 enters the indoor heat exchanger 4 for heat exchange after passing through the throttling device 5, and the refrigerant subjected to heat exchange by the indoor heat exchanger 4 enters the compressor 1 for compression through the air suction port 12 of the compressor 1. Meanwhile, the other 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 through the high-temperature refrigerant, so that the water on the chassis 8 is prevented from freezing, ice and snow and the like can be prevented from blocking a water outlet of the chassis 8, and further, accumulated water on the chassis 8 is prevented from beating fan blades of the outdoor fan. The refrigerant having exchanged heat in the first heat exchanger 71 enters the compressor 1 through the suction port 12 of the compressor 1 and is compressed.

From this, through setting up refrigerant branch 6 to set up first heat transfer device 71 on refrigerant branch 6, can avoid freezing through the water on the partly high temperature refrigerant heating chassis 8 after the compressor 1 compression, thereby can avoid ice and snow etc. to block up the outlet on chassis 8, and then avoid ponding on the chassis 8 to beat the fan blade of rotten outdoor fan, reduced air conditioning system 100's power consumption, practiced thrift the energy effectively.

For example, in some embodiments of the present invention, when the air conditioning system 100 operates in the heating mode, the outdoor temperature T may 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 refrigerant branch 6 may be opened, so that another part of the high-temperature refrigerant compressed by the compressor 1 may enter the first heat exchanging device 71 through the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant, thereby preventing water on the chassis 8 from freezing, preventing ice and snow and the like from blocking the water outlet of the chassis 8, and further preventing water accumulated on the chassis 8 from beating up the fan blades of the outdoor fan. Therefore, the energy can be saved while the heating effect of the air conditioning system 100 is ensured.

Optionally, the first preset value T1 may be 0 to 3 ℃, and the second preset value T2 may be 5 to 10 ℃. For example, the first preset value T1 may be 3 ℃ and the second preset value may be 7 ℃. In some embodiments of the present invention, when the air conditioning system 100 operates in the heating mode, when T is greater than 3 ℃ and less than 7 ℃, the refrigerant branch 6 may be opened, so that a part of the refrigerant enters the first heat exchanging device 71 to heat the chassis 8.

In some embodiments of the present invention, when the air conditioning system 100 operates in the defrosting mode, the outdoor temperature T may 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 branch 6 may be opened, so that another part of the high-temperature refrigerant compressed by the compressor 1 may enter the first heat exchanging device 71 through the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant, so as to prevent water on the chassis 8 from freezing, thereby preventing ice and snow and the like from blocking the water outlet of the chassis 8, and further preventing accumulated water on the chassis 8 from breaking the blades of the outdoor fan. Therefore, the energy can be saved while the heating effect of the air conditioning system 100 is ensured.

Optionally, the third preset value T3 may be-3 to 0 ℃, and the fourth preset value T4 may be 0 to 5 ℃. For example, the third preset value T1 may be 0 ℃ and the second preset value may be 3 ℃. In some embodiments of the present invention, when the air conditioning system 100 operates in the heating mode, when T is greater than 0 ℃ and less than 3 ℃, the refrigerant branch 6 may be opened, so that a part of the refrigerant enters the first heat exchanging device 71 to heat the chassis 8, thereby preventing the melted water from freezing until the defrosting operation is finished.

According to the air conditioning system 100 provided by the embodiment of the invention, by arranging the refrigerant branch 6 and arranging the first heat exchange device 71 on the refrigerant branch 6, water on the base plate 8 can be heated by a part of high-temperature refrigerant compressed by the compressor 1, so that the water on the base plate 8 is prevented from freezing, ice and snow and the like can be prevented from blocking a water outlet of the base plate 8, and accumulated water on the base plate 8 is prevented from beating fan blades of an outdoor fan. Therefore, the heating effect of the air conditioning system 100 can be ensured, the power consumption of the air conditioning system 100 is reduced, and the energy is saved.

According to some embodiments of the present invention, the inlet 61 of the refrigerant branch 6 comprises a first inlet 611 and a second inlet 612, the first inlet 611 is connected to the second connector 22, and the second inlet 612 is connected to the fourth connector 24. When the air conditioning system 100 operates in the heating mode, the first port 21 of the reversing component 2 is communicated with the fourth port 24, and a part of 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 interface 21 of the reversing assembly 2 is communicated with the second interface 22, and a part of high-temperature refrigerant can enter the refrigerant branch 6 through the second interface 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, and the chassis 8 is heated by the high-temperature refrigerant.

Further, a first on-off valve 91 may be provided between the first inlet 611 and the first heat exchanging device 71. Alternatively, the first switching valve 91 may be a solenoid valve. When the first on-off valve 91 is opened, the first inlet 611 communicates with the second port 22, and when the first port 21 of the reversing assembly 2 communicates with the second port 22, the refrigerant can enter the refrigerant branch 6. When the first switch valve 91 is closed, the first inlet 611 is disconnected from the second port 22, and the refrigerant cannot enter the refrigerant branch 6. For example, in the defrost mode, it may be judged whether the first switching valve 91 needs to be opened according to the outdoor temperature.

A second on-off valve 92 may be disposed between the second inlet 612 and the first heat exchanging device 71. Alternatively, the second switching 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 is communicated with the fourth port 24, the refrigerant can enter the refrigerant branch 6. When the second switch valve 92 is closed, the second inlet 612 is disconnected from the fourth connection 24, and the refrigerant cannot enter the refrigerant branch 6. For example, in the heating mode, it may be judged whether the second switching valve 92 needs to be opened or not according to the outdoor temperature.

Therefore, by arranging the first switch valve 91 and the second switch valve 92, the on-off of the refrigerant branch 6 can be controlled according to the actual operation condition, and the performance of the air conditioning system 100 is optimized.

It is understood that in other embodiments of the present invention, referring to fig. 2, the inlet 61 of the refrigerant branch 6 may also be connected between the exhaust port 11 and the first port 21 of the reversing assembly 2. Thus, when the refrigerant branch 6 is communicated, a part of the refrigerant discharged from the discharge port 11 may enter the direction changing assembly 2, and another part of the refrigerant may 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 enter the refrigerant branch 6, and the chassis 8 is heated by the high-temperature refrigerant.

Further, a fifth switch valve 95 may be disposed at the inlet 61 of the refrigerant branch 6. Alternatively, the fifth switching valve 95 is a solenoid valve.

According to some embodiments of the present invention, the air conditioning system 100 further includes a second heat exchanging device 72, and the second heat exchanging device 72 includes a first heat exchanging flow path and a second heat exchanging flow path, the first heat exchanging flow path being connected in series between the first heat exchanging device 71 and the suction port 12, and the second heat exchanging flow path being 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 may enter the first heat exchange flow path and flow to the suction port 12. The refrigerant flowing out of the indoor heat exchanger 4 may enter the second heat exchange flow path and flow to the outdoor heat exchanger 3, or the refrigerant flowing out of the outdoor heat exchanger 3 may enter the second heat exchange flow path and flow to the indoor heat exchanger 4.

Referring to fig. 1 and 2, in the heating mode, when the refrigerant branch 6 is opened, the refrigerant flowing out of the first heat exchanger 71 may flow to the first heat exchange flow path, the refrigerant flowing out of the indoor heat exchanger 4 may 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 exchanger 72, the refrigerant in the first heat exchange flow path may flow to the suction port 12 of the compressor 1, and after the refrigerant in the second heat exchange flow path may be throttled by the first throttling device 5, the refrigerant may enter the outdoor heat exchanger 3 to exchange heat and then flow to the suction port 12 of the compressor 1. Therefore, on one hand, after the refrigerant flowing out of the first heat exchange device 71 exchanges heat in the second heat exchange device 72, heat can be absorbed, the temperature can be increased, and the return air temperature of the refrigerant can be increased. On the other hand, after the refrigerant flowing out of the indoor heat exchanger 4 exchanges heat in the second heat exchange device 72, the temperature is reduced, so that more heat can be obtained in the outdoor heat exchanger 3, and the heating effect is improved.

According to some embodiments of the present invention, the refrigerant branch 6 further includes a branch path 62, a first end of the branch path 62 is connected between the first heat exchanging device 71 and the first heat exchanging flow path, and a second end of the branch path 62 is connected between the outdoor heat exchanger 3 and the indoor heat exchanger 4. When the branch line 62 is opened, the refrigerant flowing out of the first heat exchange device 71 may 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 exchanger 71 may enter the indoor heat exchanger 4 to exchange heat and then flow to the suction port 12, thereby being beneficial to increasing the return air temperature of the refrigerant.

In some embodiments of the present invention, the second end of the shunt 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 exchanger 71 is throttled by the throttle device 5, enters the indoor heat exchanger 4 for heat exchange, and then flows to the suction port 12, thereby being beneficial to improving the return air temperature of the refrigerant.

According to some embodiments of the present invention, a third on/off valve 93 is disposed on the branch path 62, and the third on/off valve 93 can open or close the branch path 62. Alternatively, the third switching valve 93 is a solenoid valve. A fourth switching valve 94 is provided between the first end of the branch passage 62 and the first heat exchange flow path. Alternatively, the fourth switching valve 94 is a solenoid valve. When the fourth switching valve 94 is opened, the refrigerant flowing out of the first heat exchanger 71 may flow to the suction port 12 through the first heat exchange flow path. When the fourth switching valve 94 is closed, the refrigerant flowing out of the first heat exchanger 71 may flow to the indoor heat exchanger 4 through the branch line 62 and then to the suction port 12.

For example, when the air conditioning system 100 is in a heating operation, the fourth switching valve 94 may be opened, and the third switching valve 93 may be closed. When the air conditioning system 100 operates the defrost mode, the third switching valve 93 may be opened and the fourth switching valve 94 may be closed. Therefore, the flow direction of the refrigerant in the refrigerant branch 6 can be controlled according to the actual operation condition of the air conditioning system 100, which is beneficial to optimizing the performance of the air conditioning system 100.

According to some embodiments of the present invention, the air conditioning system 100 further comprises an electric heating element 81, as shown in fig. 3, the electric heating element 81 being provided on the base pan 8. The electric heating element 81 may be used to assist in heating the chassis 8 to avoid heating the chassis 8.

For example, when the outdoor temperature is low and the refrigerant in the refrigerant branch 6 provides enough heat to melt ice and snow on the chassis 8, the electric heating element 81 can be turned on, the electric heating element 81 is used to heat the chassis 8, water on the chassis 8 is prevented from freezing, and therefore the ice and snow can be prevented from blocking the water outlet of the chassis 8. Therefore, different heating modes can be selected according to actual needs, and energy is saved while the heating effect of the air conditioning system 100 is ensured.

According to some embodiments of the present invention, the first heat exchanging device 71 includes a first heat exchanging portion 711, a second heat exchanging portion 712, and a connecting portion 713 that are disposed opposite to each other, and the first heat exchanging portion 711 and the second heat exchanging portion 712 are respectively connected to both ends of the connecting portion 713 and are disposed opposite to each other. Alternatively, the electric heating member 81 is disposed between the first heat exchanging part 711 and the second heat exchanging part 712. Therefore, the arrangement of the first heat exchange device 71 and the electric heating element 81 can be more compact, the overall occupied space of the first heat exchange device 71 and the electric heating element 81 can be reduced, and the arrangement of all the components on the chassis 8 is more reasonable.

Alternatively, the first heat exchange means 71 may be a U-shaped heat exchange pipe. The U-shaped pipe heat exchanger has the advantages of large heat exchange area, simple and compact structure, high sealing performance, convenience in installation and convenience in later-stage maintenance and cleaning.

Fig. 4 illustrates a control flowchart of a control method of the air conditioning system 100 according to an embodiment of the present invention.

As shown in fig. 4, a control method of an air conditioning system 100 according to an embodiment of the second aspect of the present invention includes:

judging whether the air-conditioning system 100 starts heating operation or enters a defrosting mode;

if the air conditioning system 100 starts heating operation or enters a defrosting mode, acquiring the current outdoor temperature T;

when the air conditioning system 100 is in heating operation, 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 communicated;

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 communicated.

In the heating mode, when the outdoor temperature T satisfies that T1 is more than T and less than T2, the refrigerant branch 6 can be controlled to be opened, at the moment, a part of high-temperature refrigerant compressed by the compressor 1 enters the indoor heat exchanger 4 for heat exchange, the refrigerant subjected to heat exchange by the indoor heat exchanger 4 enters the outdoor heat exchanger 3 for heat exchange after passing through the first throttling device 5, and the refrigerant subjected to heat exchange by the outdoor heat exchanger 3 enters the compressor 1 for compression through the air suction port 12 of the compressor 1. Meanwhile, another part of the high-temperature refrigerant compressed by the compressor 1 can enter the first heat exchanging device 71 through the refrigerant branch 6, the chassis 8 is heated by the high-temperature refrigerant, water on the chassis 8 is prevented from freezing, ice and snow and the like can be prevented from blocking a water outlet of the chassis 8, and the refrigerant after heat exchange in the first heat exchanging device 71 enters the compressor 1 through the air suction port 12 of the compressor 1 to be compressed.

Therefore, water on the chassis 8 can be heated by a part of high-temperature refrigerant compressed by the compressor 1, so that the water on the chassis 8 is prevented from freezing, and ice and snow and the like can be prevented from blocking a water outlet of the chassis 8.

For example, in some examples of the present invention, the first preset value T1 may be 0 to 3 ℃ and the second preset value T2 may be 5 to 10 ℃. For example, the first preset value T1 may be 3 ℃ and the second preset value may be 7 ℃. In some embodiments of the present invention, when the air conditioning system 100 operates in the heating mode, when T is greater than 3 ℃ and less than 7 ℃, the refrigerant branch 6 may be opened, so that a part of the refrigerant enters the first heat exchanging device 71 to heat the chassis 8.

The third preset value T3 can be-3-0 ℃, and the fourth preset value T4 can be 0-5 ℃. For example, the third preset value T1 may be 0 ℃, and the second preset value may be 3 ℃. In some embodiments of the present invention, when the air conditioning system 100 operates in the heating mode, when T is greater than 0 ℃ and less than 3 ℃, the refrigerant branch 6 may be opened, so that a part of the refrigerant enters the first heat exchanging device 71 to heat the chassis 8, thereby preventing the melted water from freezing until the defrosting operation is finished.

According to the control method of the air conditioning system 100 in the embodiment of the second aspect of the present invention, by providing the refrigerant branch 6 and providing the first heat exchanging device 71 on the refrigerant branch 6, a part of high temperature refrigerant compressed by the compressor 1 can heat water on the chassis 8, so as to prevent the water on the chassis 8 from freezing, thereby preventing ice and snow and the like from blocking the water outlet of the chassis 8, and preventing accumulated water on the chassis 8 from beating the fan blades of the outdoor fan. Therefore, the heating effect of the air conditioning system 100 can be ensured, the power consumption of the air conditioning system 100 is reduced, and the energy is saved.

According to some embodiments of the present invention, when the air conditioning system 100 operates in the heating mode, and 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 will not freeze substantially, and the heating capability can be fully ensured, and at this time, the refrigerant branch 6 may be closed. It can be understood that, when the electric heating element 81 is disposed on the chassis 8, the electric heating element 81 is also turned off when the outdoor temperature T is greater than or equal to the second preset value T2 during the heating mode of the air conditioning system 100. This can reduce power consumption while ensuring heating performance of the air conditioning system 100.

Further, when the electric heating element 81 is arranged on the chassis 8, when the air conditioning system 100 operates in the defrosting mode, and 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, the chassis 8 is heated by the electric heating element 81, water on the chassis 8 is prevented from freezing, and therefore ice and snow and the like can be prevented from blocking the water outlet of the chassis 8.

For example, in the defrosting mode, when the outdoor temperature is less than or equal to 0 ℃, the electric heating element 81 can be turned on, the chassis 8 is heated by the electric heating element 81, water on the chassis 8 is prevented from freezing, and ice and snow and the like can be prevented from blocking the water outlet of the chassis 8.

In some further embodiments of the present invention, 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 as to achieve the purpose of energy saving and ice prevention of the chassis 8.

For example, in some embodiments of the present invention, when T is less than or equal to-15 ℃, the refrigerant branch 6 may be turned off, and the electric heating element 81 is controlled to operate at the maximum power W1 until the defrosting operation is finished. The water drops of the defrosting of the chassis 8 can be discharged from the chassis 8 in time, and the fan blades are prevented from being frozen and rotten.

When the temperature is lower than 15 ℃ below zero and lower than or equal to 8 ℃ below zero, the refrigerant branch 6 can be closed, and the electric heating element 81 is controlled to operate at the power W2 until the defrosting action is finished. Wherein W1> W2. The power consumption of the electric heating element 81 is reduced while the defrosting water drop of the chassis 8 is ensured to be timely removed, and the electric energy is saved.

When the temperature is lower than-8 ℃ and lower than T and lower than-2 ℃, the refrigerant branch 6 can be closed, and the electric heating element 81 is controlled to operate at the power W3 until the defrosting action is finished. Wherein W1> W2> W3. The power consumption of the electric heating element 81 is reduced while the defrosting water drop removal efficiency of the chassis 8 is ensured, and the electric energy is further saved.

When the temperature is lower than-2 ℃ and less than or equal to 0 ℃, the refrigerant branch 6 can be closed, and the electric heating element 81 is controlled to operate at the power W3 until the defrosting action is finished. Wherein W1> W2> W3> W4. The power consumption of the electric heating pipe is reduced while the defrosting water drop removal efficiency of the chassis 8 is ensured, and electric energy is further saved.

The air conditioning system 100 and the control method of the air conditioning system 100 according to the embodiment of the present invention are described below with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1, the air conditioning system 100 includes: the heat exchanger comprises a compressor 1, a reversing assembly 2, an outdoor heat exchange assembly, an indoor heat exchanger 4, a throttling device 5, a refrigerant branch 6 and a second heat exchange device 72.

The compressor 1 has a suction port 12 and a discharge port 11. The reversing assembly 2 comprises 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 comprises 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 with the second connector 22, and the indoor heat exchanger 4 is connected between the fourth connector 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 throttling device 5 is arranged 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 connector 22, and the second inlet 612 is connected to the fourth connector 24. The outlet of the refrigerant branch 6 is connected with 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 switching valve 91 may be provided between the first inlet 611 and the first heat exchanging means 71. A second on-off valve 92 may be disposed between the second inlet 612 and the first heat exchanging device 71.

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

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

if the air-conditioning system 100 starts heating operation or enters a defrosting mode, acquiring the current outdoor temperature T;

when the air conditioning system 100 is in heating operation, if the outdoor temperature T is greater than the first preset value T1 and less than the second preset value T2, the second switch valve 92 and the fourth switch valve 94 are opened, and the first switch valve 91 and the third switch valve 93 are closed;

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 and

fourth switching valves

92 and 94 are closed, and the first and

third switching valves

91 and 93 are opened.

Example two:

as shown in fig. 2, the air conditioning system 100 of the second embodiment has substantially the same structure as the air conditioning system 100 of the first embodiment, except that the inlet 61 of the refrigerant branch 6 in this embodiment is connected between the air outlet 11 and the first port 21. Other structures of the air conditioning system 100 are the same as those of the first embodiment, and are not described herein again.

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

The computer-readable storage medium described above may take 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. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM) or flash Memory, an optical fiber, a portable compact disc Read Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate 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 operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. 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 type of Network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

In the description of the present invention, it is to be understood that the terms "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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.

While embodiments of the invention 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 to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioning system, comprising:

a compressor having a suction port and a discharge port;

the reversing assembly comprises 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 air suction port;

the outdoor heat exchange assembly comprises 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 with the second interface;

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

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

the inlet of the refrigerant branch is connected with the exhaust port, the outlet of the refrigerant branch is connected with the air suction port, and the refrigerant branch is provided with a first heat exchange device which is arranged on the chassis.

2. The air conditioning system as claimed in claim 1, wherein the inlet of the refrigerant branch comprises a first inlet and a second inlet, the first inlet is connected to the second port, and the second inlet is connected to the fourth port.

3. The air conditioning system as claimed in claim 2, wherein a first on-off valve is provided between the first inlet and the first heat exchanging means, and a second on-off valve is provided between the second inlet and the first heat exchanging means.

4. The air conditioning system as claimed in claim 1, wherein an inlet of said refrigerant branch is connected between said discharge port and said first port.

5. The air conditioning system of claim 1, further comprising a second heat exchange device comprising a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path being in series between the first heat exchange device and the suction port, the second heat exchange flow path being in series between the indoor heat exchanger and the outdoor heat exchanger.

6. The air conditioning system as claimed in claim 5, wherein the refrigerant branch further includes a branch line, a first end of the branch line is connected between the first heat exchanging device and the first heat exchanging flow path, and a second end of the branch line is connected between the outdoor heat exchanger and the indoor heat exchanger.

7. The air conditioning system as claimed in claim 6, wherein a second end of the bypass branch is connected between the outdoor heat exchanger and the throttling means.

8. The air conditioning system as claimed in claim 6, wherein a third on/off valve is provided on the branch passage, and a fourth on/off valve is provided between the first end of the branch passage and the first heat exchange flow passage.

9. An air conditioning system as claimed in any one of claims 1 to 8, further comprising an electrical heating element provided on the base pan.

10. The air conditioning system as claimed in claim 9, wherein the first heat exchanging means includes a first heat exchanging part, a second heat exchanging part and a connecting part which are oppositely disposed, the first heat exchanging part and the second heat exchanging part are respectively connected to both ends of the connecting part and are oppositely disposed from each other, and the electric heating member is disposed between the first heat exchanging part and the second heat exchanging part.

11. A control method of an air conditioning system as set forth in any one of claims 1 to 10, characterized in that the control method comprises:

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

if the air conditioning system starts heating operation or enters a defrosting mode, acquiring the current outdoor temperature T;

when the air conditioning system is in heating operation, 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 be communicated;

and when the air conditioning system enters a defrosting mode, if the outdoor temperature T is greater than a third preset value T3 and less than a fourth preset value T4, controlling the refrigerant branch to be communicated.

12. A computer-readable storage medium, having stored thereon a control program of an air conditioning system, which when executed by a processor, implements the control method of claim 11.