Air conditioning system

Abstract

The utility model discloses an air conditioning system, and relates to the technical field of air conditioners. The air conditioning system comprises a compressor, an outdoor heat exchanger, a first four-way valve, a heat exchange tail end and a second four-way valve. The first four-way valve is communicated with an inlet of the compressor through a first pipeline; the first four-way valve is communicated with an outlet of the compressor through a second pipeline; the first four-way valve is communicated with the outdoor heat exchanger through a third pipeline; the heat exchange tail end comprises a radiation tail end and / or a convection tail end; the radiation tail end is connected with a fifth pipeline and a sixth pipeline, and the sixth pipeline is communicated with the outdoor heat exchanger; the convection tail end is connected with a seventh pipeline and an eighth pipeline. The end, away from the convection tail end, of the seventh pipeline is connected to the outdoor heat exchanger. The second four-way valve is communicated with the radiation tail end through a fifth pipeline, the second four-way valve is communicated with the convection tail end through an eighth pipeline, and the second four-way valve is communicated with the compressor through a first pipeline; the second four-way valve is communicated with the first four-way valve; according to the air conditioning system, the radiation tail end and the convection tail end are independently arranged, so that only the radiation tail end or the convection tail end or the radiation tail end and the convection tail end can be installed on the air conditioning system at the same time, and therefore a user can select the needed heat exchange tail end.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning system. Background Art

[0002] With the advancement of technology and the improvement of people's living standards, people have higher and higher requirements for indoor environment. Traditional centralized heating can no longer meet people's requirements. More and more people choose air-conditioning systems for autonomous heating.

[0003] Traditional air conditioning systems use convection heat exchange to heat, which has poor heating effect and cannot meet people's heating requirements. In some multi-split heat pump systems, there are usually heating terminals and cooling terminals. The heating terminal usually refers to radiators or floor heating, which heat the indoor environment by radiation heat exchange, and the cooling terminal usually refers to the indoor unit of the traditional air conditioning system.

[0004] According to the different usage areas and users of heat pump air conditioners, people often have different needs for heating and cooling. Some users only need heating but not cooling, some users only need cooling but not heating, and some users need both heating and cooling. For users who only need heating and cooling, installing the heating terminal and the cooling terminal at the same time obviously increases the cost of the air-conditioning system and causes idle waste of resources. However, in the current multi-split heat pump system, it is usually necessary to install the cooling terminal and the heating terminal at the same time, and it is impossible to achieve the single installation of the cooling terminal or the heating terminal, which cannot meet people's needs well. Utility Model Content

[0005] In view of the deficiencies existing in the related art, the present application provides an air-conditioning system to solve the problem in the prior art that the air-conditioning system cannot be installed with only a heating terminal or a cooling terminal.

[0006] The present application provides an air conditioning system, comprising:

[0007] A compressor, comprising a compressor inlet and a compressor outlet, wherein the compressor inlet is connected to a first pipeline, and the compressor outlet is connected to a second pipeline;

[0008] An outdoor heat exchanger comprises a first opening and a second opening, the first opening is connected to a third pipeline, and the second opening is connected to a fourth pipeline;

[0009] A first four-way valve is connected to the compressor inlet through a first pipeline; the first four-way valve is connected to the compressor outlet through a second pipeline; the first four-way valve is connected to the first opening through a third pipeline;

[0010] a heat exchange end, which includes a radiation end and / or a convection end;

[0011] The radiation terminal includes a heating inlet and a heating outlet, the heating inlet is connected to a fifth pipeline, the heating outlet is connected to a sixth pipeline, and the sixth pipeline is connected to the fourth pipeline;

[0012] The convection end includes a first convection port and a second convection port, the first convection port is connected to a seventh pipeline, an end of the seventh pipeline away from the convection end is connected to the fourth pipeline, and the second convection port is connected to an eighth pipeline;

[0013] a second four-way valve, which is connected to the heating inlet through the fifth pipeline, the second four-way valve is connected to the convection end through the eighth pipeline, the second four-way valve is connected to the compressor inlet through the first pipeline; the second four-way valve is connected to the first four-way valve;

[0014] The technical solution connects the sixth pipeline and the seventh pipeline in parallel to the fourth pipeline; and the fifth pipeline and the eighth pipeline in parallel to the second four-way valve, so that the radiation terminal and the convection terminal are set independently of each other, so that the air-conditioning system can choose to install only the radiation terminal or only the convection terminal or both the radiation terminal and the convection terminal according to user needs.

[0015] In some embodiments, the heat exchange end is a radiation end; the compressor causes the refrigerant to flow from the compressor outlet through the second pipeline, the first four-way valve, and then into the second four-way valve, and then through the second four-way valve and then through the fifth pipeline to enter the radiation end, and then through the sixth pipeline and the fourth pipeline to flow into the outdoor heat exchanger, and then through the third pipeline and the first four-way valve and then through the first pipeline to flow back to the compressor.

[0016] In some embodiments, the heat exchange end is a convection end, and the convection end is used for cooling or heating; the compressor causes the refrigerant to flow from the compressor outlet through the second pipeline, the first four-way valve, the third pipeline, and enter the outdoor heat exchanger, and then flow through the fourth pipeline, the seventh pipeline, and then flow into the convection end, and then flow through the eighth pipeline, the second four-way valve, and then flow back to the compressor through the first pipeline to cool the convection end;

[0017] The compressor causes the refrigerant to flow from the compressor outlet through the second pipeline and the first four-way valve in sequence, and then flow into the second four-way valve, and then flow through the second four-way valve and enter the convection end through the eighth pipeline, and then flow through the seventh pipeline and the fourth pipeline in sequence and flow into the outdoor heat exchanger, and then flow through the third pipeline and the first four-way valve in sequence and then flow back to the compressor through the first pipeline to heat the convection end.

[0018] In some of the embodiments, the heat exchange end includes a radiation end and a convection end, and the radiation end and the convection end work selectively.

[0019] In some of the embodiments, a plurality of radiation ends are provided, and the plurality of radiation ends are connected in parallel with each other.

[0020] In some of the embodiments, a flasher is further included. The flasher is arranged in the fourth pipeline. The flasher is connected to an air supply pipeline. One end of the air supply pipeline away from the flasher is connected to the compressor.

[0021] In some embodiments, the first four-way valve is further connected to a tenth pipeline, which is connected to the third pipeline; the flasher is connected to a return pipeline, and one end of the return pipeline away from the flasher is connected to the first pipeline.

[0022] In some of the embodiments, the flasher is connected to a ninth pipeline, a three-way valve is provided in the ninth pipeline, the air supply pipeline and the air return pipeline are connected in parallel to the three-way valve, and the air return pipeline is arranged in parallel with the air supply pipeline; the ninth pipeline is selectively connected to the air supply pipeline or the air return pipeline.

[0023] In some embodiments, the third pipeline is provided with a first solenoid valve, which is located between the first four-way valve and the first opening; the second four-way valve is connected to the tenth pipeline, the tenth pipeline is connected to the third pipeline, and the connection between the tenth pipeline and the third pipeline is located between the first solenoid valve and the outdoor heat exchanger; the tenth pipeline is provided with a second solenoid valve, and one of the first solenoid valve and the second solenoid valve is opened selectively.

[0024] In addition, the present application also provides an air conditioning system, comprising:

[0025] A compressor, comprising a compressor inlet and a compressor outlet, wherein the compressor inlet is connected to a first pipeline, and the compressor outlet is connected to a second pipeline;

[0026] An outdoor heat exchanger comprises a first opening and a second opening, the first opening is connected to a third pipeline, and the second opening is connected to a fourth pipeline;

[0027] a first four-way valve, which is connected to the compressor outlet through a second pipeline;

[0028] The radiation terminal is used for heating; it includes a heating inlet and a heating outlet, the heating inlet is connected to a fifth pipeline, the heating outlet is connected to a sixth pipeline, and the sixth pipeline is connected to the fourth pipeline;

[0029] a second four-way valve, which is connected to the heating inlet through a fifth pipeline, and the second four-way valve is connected to the first four-way valve;

[0030] A flasher is provided in the fourth pipeline.

[0031] A return air pipeline, one end of which is connected to the flasher, and the other end of which is connected to the first pipeline;

[0032] a tenth pipeline, one end of which is connected to the first four-way valve, and the other end of which is connected to the third pipeline;

[0033] The compressor causes the refrigerant to flow from the compressor outlet through the second pipeline and the first four-way valve in sequence, and then enter the second four-way valve. Part of the refrigerant flows through the third pipeline, passes through the outdoor heat exchanger, and then enters the flash evaporator through the fourth pipeline; part of the refrigerant flows through the second four-way valve in sequence, enters the heating terminal through the fifth pipeline, and then enters the flash evaporator through the sixth pipeline; the refrigerant entering the flash evaporator flows back to the compressor through the return air pipeline and the first pipeline to defrost the outdoor heat exchanger.

[0034] The technical solution is to split the refrigerant, with part of the refrigerant flowing into the radiation end through the second four-way valve and part of the refrigerant flowing into the outdoor heat exchanger through the tenth pipeline, and to set a flasher and a return air pipeline so that the low-temperature and low-pressure refrigerant flows back to the compressor through the return air pipeline, so that the air-conditioning system can defrost the outdoor heat exchanger while heating.

[0035] In the above embodiment, an air-conditioning system arranges the radiation terminal and the convection terminal independently from each other, so that the air-conditioning system can be installed with only the radiation terminal, only the convection terminal, or both the radiation terminal and the convection terminal at the same time, so that the user can choose the required heat exchange terminal without installing all the heat exchange terminals, thereby meeting the needs of different users and reducing the cost of installing the air-conditioning system for the user; even if only one of the heat exchange terminals is installed, it will not affect the normal operation of the air-conditioning system.

[0036] The air conditioning system can also defrost the outdoor heat exchanger while heating the indoor environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of an embodiment of the air conditioning system of the present application;

[0038] Figure 2 is a system schematic diagram of an embodiment of the air conditioning system of the present application;

[0039] Figure 3 It is a schematic diagram of the flow path of the refrigerant when the radiation terminal is working in one embodiment of the air conditioning system of the present application;

[0040] Figure 4 is a schematic diagram of the flow path of the refrigerant during convection end cooling in one embodiment of the air conditioning system of the present application;

[0041] Figure 5 It is a schematic diagram of the flow path of the refrigerant during convection terminal heating in one embodiment of the air conditioning system of the present application;

[0042] Figure 6 is a schematic diagram of a system when multiple radiation terminals are installed in one embodiment of the air conditioning system of the present application;

[0043] Figure 7This is a schematic diagram of a system in which only the radiation terminal is installed in one embodiment of the air conditioning system of the present application;

[0044] Figure 8 It is a schematic diagram of a system in which only the convection terminal is installed in one embodiment of the air conditioning system of the present application;

[0045] Fig. 9 It is a schematic diagram of the flow direction of the refrigerant when the radiation terminal is heating in one embodiment of the air conditioning system of the present application;

[0046] Fig.10 It is a schematic diagram of the flow direction of the refrigerant during convection end cooling in one embodiment of the air conditioning system of the present application;

[0047] Fig.11 A schematic diagram of the flow direction of the refrigerant during convection heating at the end of an air conditioning system in an embodiment of the present application;

[0048] Fig.12 It is a schematic diagram of the flow path of the refrigerant when the compressor is replenishing air in one embodiment of the air conditioning system of the present application;

[0049] Fig.13 Schematic diagram of the refrigerant flow direction when the radiation terminal is heating and the system is defrosting in one embodiment of the air conditioning system of the present application Figure 2

[0050] Fig.14 This is a schematic diagram of the flow direction of the refrigerant when the convection end is heated and the system is defrosted in one embodiment of the air-conditioning system of the present application.

[0051] In the figure,

[0052] 100, outdoor end; 200, radiation end; 300, convection end; 400, controller; 500, first four-way valve; 600, second four-way valve; 700, flasher; 800, three-way valve;

[0053] 110, compressor; 120, outdoor heat exchanger; 130, outdoor fan; 140, first electronic expansion valve; 150, exhaust temperature sensor; 160, exhaust pressure sensor;

[0054] 111, first pipeline; 112, second pipeline; 121, third pipeline; 122, fourth pipeline;

[0055] 1211, first solenoid valve;

[0056] 201, fifth pipeline; 202, sixth pipeline; 210, second electronic expansion valve;

[0057] 2011, sixth solenoid valve; 2021, third solenoid valve;

[0058] 310, convection heat exchanger; 320, indoor fan; 330, third electronic expansion valve;

[0059] 311, seventh pipeline; 312, eighth pipeline;

[0060] 3111, fourth solenoid valve; 3121, fifth solenoid valve;

[0061] 610, the tenth pipeline;

[0062] 6011, second solenoid valve;

[0063] 701, ninth pipeline; 702, air supply pressure sensor; 703, air supply temperature sensor;

[0064] 7011, seventh solenoid valve;

[0065] 810, air supply pipeline; 820, air return pipeline. DETAILED DESCRIPTION

[0066] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0067] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0068] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0069] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0070] The air conditioning system provided in the embodiments of the present application may have various implementation forms. Figure 1-Figure 14 This is a specific implementation of the air conditioning system of the present application.

[0071] like Figure 1As shown, the air conditioning system includes an outdoor end 100, which is arranged outdoors and exchanges heat with outdoor air.

[0072] The air conditioning system includes an indoor end, which is arranged indoors. The indoor end cooperates with the outdoor end 100 to achieve the air conditioning system to adjust the indoor environment temperature.

[0073] The indoor end includes a heat exchange terminal, which is used to cool or heat the indoor environment.

[0074] The refrigerant circulates between the outdoor end 100 and the indoor end, and utilizes the characteristics of the refrigerant absorbing and releasing heat when changing from gas phase to liquid phase to achieve cooling or heating of the indoor environment; when the indoor environment needs cooling, the liquid refrigerant flows into the indoor end, absorbs the heat of the indoor air, and changes into a gas phase and flows back to the outdoor end 100, exchanges heat with the outdoor air, releases heat again and becomes a liquid phase, and then enters the indoor end for circulating cooling; when the indoor environment needs heating, the gas refrigerant enters the indoor end, releases heat, changes into a liquid phase and flows back to the outdoor end 100, absorbs the heat of the outdoor air again and becomes a gas phase, and then enters the indoor end for circulating heating.

[0075] like Figure 2-Figure 14 As shown, the air conditioning system includes a compressor 110, and the compressor 110 is used to compress the refrigerant in a low-temperature and low-pressure state into a high-temperature and high-pressure state, and drive the refrigerant to flow in the pipeline.

[0076] The compressor 110 includes a compressor inlet, which is connected to a first pipeline 111 , and a refrigerant in a low-temperature and low-pressure state enters the compressor 110 from the compressor inlet through the first pipeline 111 .

[0077] The compressor 110 includes a compressor outlet, which is connected to a second pipeline 112 . The refrigerant in a high-temperature and high-pressure state is output from the compressor 110 through the second pipeline 112 from the compressor outlet.

[0078] like Fig. 9 and Fig.10 As shown, an exhaust temperature sensor 150 is provided in the second pipeline 112 for detecting the temperature in the second pipeline 112 .

[0079] An exhaust pressure sensor 160 is disposed in the second pipeline 112 for detecting the pressure of the second pipeline 112 .

[0080] like Figure 2-Figure 14 As shown, the air conditioning system includes an outdoor heat exchanger 120, which is located at the outdoor end 100 and is used for exchanging heat with outdoor air.

[0081] The outdoor heat exchanger 120 includes a first opening, and the first opening is connected to a third pipeline 121 .

[0082] The outdoor heat exchanger 120 includes a second opening, and the second opening is connected to a fourth pipeline 122 .

[0083] When the air-conditioning system heats the indoor environment, the outdoor heat exchanger 120 works as an evaporator, and the refrigerant flows into the outdoor heat exchanger 120 through the first opening and flows out of the outdoor heat exchanger 120 through the second opening; when the air-conditioning system cools the indoor environment, the outdoor heat exchanger 120 works as a condenser, and the refrigerant flows into the outdoor heat exchanger 120 through the second opening and flows out of the outdoor heat exchanger 120 through the first opening.

[0084] A first electronic expansion valve 140 is provided in the fourth pipeline 122 . After the high-temperature and high-pressure refrigerant passes through the first electronic expansion valve 140 for throttling, it becomes a low-temperature and low-pressure refrigerant.

[0085] like Figure 2-Figure 14 As shown, the air conditioning system includes an outdoor fan 130 , which is disposed close to the outdoor heat exchanger 120 . The outdoor fan 130 is used to promote convective heat exchange between outdoor air and the outdoor heat exchanger 120 , thereby increasing the heat exchange efficiency of the outdoor heat exchanger 120 .

[0086] The air conditioning system includes a heat exchange terminal, which is used to adjust the indoor environment temperature.

[0087] like Figure 2-Figure 7 As shown, the heat exchange terminal includes a radiation terminal 200, which is used to heat the indoor environment. The radiation terminal 200 exchanges heat with the indoor air in a radiation heat exchange manner. The radiation terminal 200 is usually a radiator, or a capillary tube laid on the ground or wall. In this embodiment, the radiation terminal 200 is a radiator.

[0088] The refrigerant circulates between the compressor 110, the radiation terminal 200, and the outdoor heat exchanger 120 to heat the indoor environment.

[0089] The radiation terminal 200 includes a heating inlet, the heating inlet is connected to a fifth pipe 201 , and the refrigerant flows into the radiation terminal 200 from the heating inlet.

[0090] The radiation terminal 200 includes a heating outlet, the heating outlet is connected to the sixth pipeline 202, and the refrigerant flows out of the radiation terminal 200 through the heating outlet.

[0091] The sixth pipeline 202 is provided with a second electronic expansion valve 210. After the high-pressure refrigerant passes through the second electronic expansion valve 210 for throttling, it becomes a low-pressure refrigerant.

[0092] like Figure 2-Figure 6As shown, the heat exchange terminal includes a convection terminal 300, and the convection terminal 300 exchanges heat with the indoor air in a convection manner. The convection terminal 300 can cool the indoor environment or heat the indoor environment; the convection terminal 300 is usually a wall-mounted air conditioner indoor unit, a vertical air conditioner indoor unit, etc.

[0093] The convection terminal 300 includes a convection heat exchanger 310 , which exchanges heat with indoor air to cool or heat the indoor environment.

[0094] The convection terminal 300 includes an indoor fan 320 , which is disposed close to the convection heat exchanger 310 to promote convection heat exchange between indoor air and the convection heat exchanger 310 , so as to increase the heat exchange effect of the convection heat exchanger 310 .

[0095] The counterflow heat exchanger 310 includes a first counterflow port, the first counterflow port is connected to a seventh pipeline 311 , and the refrigerant flows into the counterflow heat exchanger 310 through the first counterflow port.

[0096] The counterflow heat exchanger 310 includes a second counterflow port, the second counterflow port is connected to an eighth pipeline 312 , and the refrigerant flows out of the counterflow heat exchanger 310 through the second counterflow port.

[0097] The seventh pipeline 311 is provided with a third electronic expansion valve 330. After the high-temperature and high-pressure refrigerant passes through the third electronic expansion valve 330 for throttling, it becomes a low-temperature and low-pressure refrigerant.

[0098] The refrigerant circulates between the compressor 110, the outdoor heat exchanger 120, and the countercurrent heat exchanger 310 to cool the indoor environment.

[0099] The refrigerant circulates between the compressor 110, the countercurrent heat exchanger 310, and the outdoor heat exchanger 120 to heat the indoor environment.

[0100] In actual applications, different users have different requirements for indoor environments. Some users may only need to heat the indoor environment, some users may only need to cool the indoor environment, and some users may sometimes need to heat the indoor environment and sometimes need to cool the indoor environment.

[0101] Based on this, in the present application, in order to enable the air-conditioning system to meet the needs of different users, the radiation terminal 200 and the convection terminal 300 are set independently of each other, so that the air-conditioning system can install only the radiation terminal 200, or only the convection terminal 300, or install both the radiation terminal 200 and the convection terminal 300 according to user needs.

[0102] Specifically, the air conditioning system includes a first four-way valve 500, and the first four-way valve 500 is used to change the flow direction of the refrigerant.

[0103] The first four-way valve 500 includes a port d connected to the second pipeline 112 .

[0104] The first four-way valve 500 includes a port s, and the port s is connected to the first pipeline 111.

[0105] The first four-way valve 500 includes a port c connected to the third pipeline 121 .

[0106] The first four-way valve 500 includes a port e.

[0107] The air conditioning system includes a second four-way valve 600, and the second four-way valve 600 is used to change the flow direction of the refrigerant.

[0108] The second four-way valve 600 includes a port d′ connected to the port e of the first four-way valve 500 .

[0109] The second four-way valve 600 includes a port s′ connected to an end of the first pipeline 111 away from the compressor 110 .

[0110] The second four-way valve 600 includes a port c′ connected to an end of the fifth pipeline 201 away from the radiation end 200 .

[0111] The second four-way valve 600 includes a port e′ connected to an end of the eighth pipeline 312 away from the convection end 300 .

[0112] The fifth pipeline 201 and the eighth pipeline 312 are connected in parallel to the second four-way valve 600, and the sixth pipeline 202 and the seventh pipeline 311 are connected in parallel to the fourth pipeline 122, so that the radiation terminal 200 and the convection terminal 300 can be set independently of each other, so that when the air-conditioning system only installs one of the heat exchange terminals, the refrigerant can still flow reliably.

[0113] During production of the air-conditioning system, installation positions for the radiation terminal 200 and the convection terminal 300 and corresponding connecting pipes are reserved. During actual installation, only the parts required by the user are installed according to user needs, so that the user can save the cost of installing the air-conditioning system.

[0114] It should be noted that the fifth pipeline 201 is provided with a sixth solenoid valve 2011, and the sixth solenoid valve 2011 is used to control the on-off of the fifth pipeline 201 to control the flow of the refrigerant.

[0115] The sixth pipeline 202 is provided with a third solenoid valve 2021, and the third solenoid valve 2021 is used to control the on-off of the sixth pipeline 202 to control the flow of the refrigerant.

[0116] The seventh pipeline 311 is provided with a fourth solenoid valve 3111, and the fourth solenoid valve 3111 is used to control the on-off of the seventh pipeline 311 to control the flow of the refrigerant.

[0117] The eighth pipeline 312 is provided with a fifth solenoid valve 3121, and the fifth solenoid valve 3121 is used to control the on-off of the eighth pipeline 312 to control the flow of the refrigerant.

[0118] When the air-conditioning system is only installed with the radiation terminal 200, the fourth solenoid valve 3111 and the fifth solenoid valve 3121 are closed; when the air-conditioning system is only installed with the convection terminal 300, the sixth solenoid valve 2011 and the third solenoid valve 2021 are closed to ensure the reliability of the refrigerant flow, so that the air-conditioning system can only install part of the heat exchange terminal.

[0119] When the air conditioning system only includes the radiation terminal 200, the air conditioning system can only heat the indoor environment. The compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500, and then enter the second four-way valve 600, and then flow through the d' port and the c' port of the second four-way valve 600, and then enter the radiation terminal 200 through the fifth pipeline 201, and then flow through the sixth pipeline 202 and the fourth pipeline 122 to flow into the outdoor heat exchanger 120, and then flow through the third pipeline 121, the c port and the s port of the first four-way valve 500, and then flow back to the compressor 110 through the first pipeline 111.

[0120] When the air conditioning system only includes the convection terminal 300, the convection terminal 300 can cool the indoor environment or heat the indoor environment. It should be noted that since the convection terminal 300 heats the indoor environment by blowing hot air into the room, the heating effect of the convection terminal 300 is weaker than the heating effect of the radiation terminal 200.

[0121] When the convection terminal 300 is cooled, the compressor 110 causes the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the c port of the first four-way valve 500, and then through the third pipeline 121 to enter the outdoor heat exchanger 120, and then flow through the fourth pipeline 122 and the seventh pipeline 311 in sequence to flow into the convection terminal 300, and then flow through the eighth pipeline 312, the e′ port and the s′ port of the second four-way valve 600 in sequence, and then flow back to the compressor 110 through the first pipeline 111.

[0122] When the convection end 300 is heated, the compressor 110 causes the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence, and then flow into the second four-way valve 600, and then flow through the d′ port and the e′ port of the second four-way valve 600, and then enter the convection end 300 through the eighth pipeline 312, and then flow through the seventh pipeline 311 and the fourth pipeline 122 in sequence, and then flow into the outdoor heat exchanger 120, and then flow through the third pipeline 121, the c port and the s port of the first four-way valve 500 in sequence, and then flow back to the compressor 110 through the first pipeline 111.

[0123] When the air conditioning system includes both the radiation terminal 200 and the convection terminal 300, although both the radiation terminal 200 and the convection terminal 300 can heat, due to the repulsion of the flow paths of the refrigerant, the radiation terminal 200 and the convection terminal 300 can only work one at a time and cannot be started at the same time. Since the radiation terminal 200 can only heat the indoor environment but cannot cool it, when the indoor environment needs to be cooled, the convection terminal 300 is started to cool the indoor environment.

[0124] When the outdoor heat exchanger 120 works as an evaporator for a long time, frost is easily formed on the surface of the outdoor heat exchanger 120, which reduces the heat exchange effect between the outdoor heat exchanger 120 and the outdoor air.

[0125] Based on this, in the present application, the air conditioning system includes a defrost unit, and the defrost unit is used to defrost the outdoor heat exchanger 120 .

[0126] like Fig.13 and Fig.14 As shown, the defrost unit includes a tenth pipeline 610, one end of which is connected to the e port of the first four-way valve 500, and the other end of which is connected to the third pipeline 121. It should be noted that the first four-way valve 500 and the outdoor heat exchanger 120 are connected in parallel to the second four-way valve 600.

[0127] The defrosting unit includes a flasher 700 , which is connected to the fourth pipeline 122 . The main function of the flasher 700 is to improve the efficiency of the refrigeration cycle and achieve energy saving.

[0128] The defrosting unit includes a return air pipeline 820 , one end of which is connected to the flasher 700 , and the other end of which is connected to the compressor 110 .

[0129] The compressor 110 causes the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence. Part of the refrigerant enters the third pipeline 121 through the tenth pipeline 610, flows through the outdoor heat exchanger 120, and then flows into the flasher 700 through the fourth pipeline 122. After that, it flows through the return air pipeline 820 and the first pipeline 111 in sequence and then flows back to the compressor 110, so that part of the high-temperature and high-pressure refrigerant flows through the outdoor heat exchanger 120 to defrost the outdoor heat exchanger 120.

[0130] In the present application, the flow path of the refrigerant when the air-conditioning system heats the indoor environment and the flow path of the refrigerant when the outdoor heat exchanger 120 is defrosted are arranged in parallel with each other. Therefore, in the present application, the outdoor heat exchanger 120 can be defrosted when the air-conditioning system is heating.

[0131] When the radiation terminal 200 is heating and the outdoor heat exchanger 120 needs to be defrosted, the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence. Part of the refrigerant enters the third pipeline 121 through the tenth pipeline 610, flows through the outdoor heat exchanger 120, and then flows into the flasher 700 through the fourth pipeline 122; part of the refrigerant flows through the d′ port and the c′ port of the second four-way valve 600 in sequence, then enters the radiation terminal 200 through the fifth pipeline 201, and then flows into the flasher 700 through the sixth pipeline 202; the refrigerant flowing into the flasher 700 flows back to the compressor 110 through the return air pipeline 820 and the first pipeline 111.

[0132] When the convection terminal 300 is heated and the outdoor heat exchanger 120 needs to be defrosted, the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence. Part of the refrigerant enters the third pipeline 121 through the tenth pipeline 610, flows through the outdoor heat exchanger 120, and then flows into the flash igniter 700 through the fourth pipeline 122; part of the refrigerant flows through the d′ port and the e′ port of the second four-way valve 600 in sequence, then enters the convection terminal 300 through the eighth pipeline 312, and then flows into the flash igniter 700 through the seventh pipeline 311; the refrigerant flowing into the flash igniter 700 flows back to the compressor 110 through the return air pipeline 820 and the first pipeline 111.

[0133] In order to ensure the reliability of the refrigerant flow, a first solenoid valve 1211 is provided in the third pipeline 121, and the first solenoid valve 1211 is located between the c port of the first four-way valve 500 and the outdoor heat exchanger 120. A second solenoid valve 6011 is provided in the tenth pipeline 610, and the second solenoid valve 6011 is used to control the on-off of the tenth pipeline 610, thereby controlling whether the refrigerant can flow into the third pipeline 121 from the d′ port of the second four-way valve 600.

[0134] It should be noted that the connection between the tenth pipeline 610 and the third pipeline 121 is located between the first solenoid valve 1211 and the outdoor heat exchanger 120 to prevent the first solenoid valve 1211 from controlling the flow of the refrigerant flowing from the tenth pipeline 610 into the third pipeline 121 .

[0135] The above-mentioned air-conditioning system can defrost the outdoor heat exchanger 120 without reducing the heating effect of the air-conditioning system. The defrosting method is simple and easy to operate and will not reduce the heating effect of the air-conditioning system.

[0136] The sixth pipeline 202 and the seventh pipeline 311 are connected in parallel to the same flasher 700, so that the unified flasher 700 can defrost the outdoor heat exchanger 120 when the radiation terminal 200 is heating, and can also defrost the outdoor heat exchanger 120 when the convection terminal 300 is heating.

[0137] like Fig.12 As shown, in the present application, the air conditioning system includes an air supply unit, and the air supply unit includes a flasher 700 , and the flasher 700 is connected to the fourth pipeline 122 .

[0138] The air supply unit includes an air supply pipeline 810, which is connected to the compressor 110. When the compressor 110 needs air supply, the gaseous refrigerant in the flasher 700 flows into the compressor 110 through the air supply pipeline 810 to increase the heating capacity of the air conditioning system.

[0139] It should be noted that, in some embodiments, in order not to affect the heating effect of the air-conditioning system, the air-conditioning system can replenish air to the compressor 110 while performing heating.

[0140] When the compressor 110 needs to be supplemented with air, the gaseous refrigerant in the flasher 700 flows into the compressor 110 through the supplementary air pipeline 810 to increase the heating capacity of the air conditioning system.

[0141] It should be noted that since the sixth pipeline 202, the seventh pipeline 311, the fourth pipeline 122 and the air supply pipeline 810 are connected in parallel to the flasher 700, the flow path of the refrigerant in the air supply pipeline 810 and the flow path of the refrigerant in the sixth pipeline 202 or the seventh pipeline 311 or the fourth pipeline 122 are set independently of each other. Therefore, in the present application, the air-conditioning system can supply air to the compressor 110 during heating.

[0142] It should be noted that, in actual applications, the defrosting frequency of the outdoor heat exchanger 120 and the air replenishment frequency of the compressor 110 are relatively low. In this application, one flasher 700 is provided to simplify the structure of the air conditioning system and facilitate layout. However, since the same flasher 700 cannot perform air replenishment and defrosting at the same time, in this application, the air conditioning system can only select one of air replenishment for the compressor 110 and defrosting for the outdoor heat exchanger 120.

[0143] like Fig.12 As shown, the flasher 700 is connected to a ninth pipeline 701, and the ninth pipeline 701 is provided with a three-way valve 800. The three-way valve 800 is connected to a return air pipeline 820 and an air supply pipeline 810 at the same time, so that the return air pipeline 820 and the air supply pipeline 810 are connected to the flasher 700 in parallel, so that the flasher 700 can be defrosted and air supplied.

[0144] The three-way valve 800 includes a port A, and the port A is connected to the ninth pipeline 701 .

[0145] The three-way valve 800 includes a port B, and the port B is connected to an air supply pipeline 810 , and the air supply pipeline 810 is in communication with the compressor 110 .

[0146] The three-way valve 800 includes a C port, and the C port is connected to a return air pipeline 820 . One end of the return air pipeline 820 away from the C port is connected to the compressor 110 .

[0147] When the compressor 110 is replenishing air, Fig.12 As shown, the A port and the B port of the three-way valve 800 are connected, and the gaseous refrigerant in the flasher 700 flows into the compressor 110 through the ninth pipeline 701 and the air supply pipeline 810 in sequence to increase the total amount of refrigerant output by the compressor 110, thereby increasing the heating effect of the air-conditioning system.

[0148] When the outdoor heat exchanger 120 is defrosted, Fig.13 and Fig.14 As shown, the A port and the C port of the three-way valve 800 are connected, and the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence, and part of the refrigerant enters the third pipeline 121 through the tenth pipeline 610, and after flowing through the outdoor heat exchanger 120, it is merged into the flash unit 700 through the fourth pipeline 122, and then flows back to the compressor 110 through the ninth pipeline 701, the return air pipeline 820, and the first pipeline 111.

[0149] It should be noted that the ninth pipeline 701 is provided with a seventh solenoid valve 7011, which is used to control the on-off of the ninth pipeline 701. When the air-conditioning system does not need to defrost and replenish air, the seventh solenoid valve 7011 is closed.

[0150] When the outdoor heat exchanger 120 needs to be defrosted, the first solenoid valve 1211 is closed, the second solenoid valve 6011, the seventh solenoid valve 7011, and the A and C ports of the three-way valve 800 are opened, and the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d ports and the e ports of the first four-way valve 500 in sequence. Part of the refrigerant enters the third pipeline 121 through the tenth pipeline 610, then flows through the outdoor heat exchanger 120 and then flows into the flasher 700 through the fourth pipeline 122, and finally flows back to the compressor 110 through the ninth pipeline 701, the return air pipeline 820, and the first pipeline 111.

[0151] When the compressor 110 needs to be supplemented with air, the seventh solenoid valve 7011 is opened, and the A port and the B port of the three-way valve 800 are connected, and the gaseous refrigerant in the flasher 700 flows into the compressor 110 through the ninth pipeline 701 and the air supplement pipeline 810.

[0152] An air supply temperature sensor 703 is provided in the ninth pipeline 701 to detect the temperature in the ninth pipeline 701 .

[0153] A gas supply pressure sensor 702 is provided in the ninth pipeline 701 to detect the pressure in the ninth pipeline 701 .

[0154] In the above-mentioned air-conditioning system, when the radiation terminal 200 is heating, the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence, and then enter the second four-way valve 600, and then flow through the d′ port and the c′ port of the second four-way valve 600 in sequence, and then enter the radiation terminal 200 through the fifth pipeline 201, and then flow through the sixth pipeline 202 and the fourth pipeline 122 in sequence to flow into the outdoor heat exchanger 120, and then flow through the third pipeline 121, the c port and the s port of the first four-way valve 500 in sequence, and then flow back to the compressor 110 through the first pipeline 111.

[0155] When the radiation terminal 200 is heating and the outdoor heat exchanger 120 is defrosting, the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence. Part of the refrigerant enters the third pipeline 121 through the tenth pipeline 610, flows through the outdoor heat exchanger 120, and then flows into the flasher 700 through the fourth pipeline 122; part of the refrigerant flows through the d′ port and the c′ port of the second four-way valve 600 in sequence, enters the radiation terminal 200 through the fifth pipeline 201, and then flows into the flasher 700 through the sixth pipeline 202; the refrigerant flowing into the flasher 700 flows back to the compressor 110 through the ninth pipeline 701, the return air pipeline 820, and the first pipeline 111.

[0156] When the radiation terminal 200 is heating and the compressor 110 is replenishing air, the gaseous refrigerant in the flasher 700 flows into the compressor 110 through the ninth pipeline 701 and the air replenishing pipeline 810 to increase the heating capacity of the air-conditioning system; the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence, and then enter the second four-way valve 600, and then flow through the d′ port and the c′ port of the second four-way valve 600 in sequence, and then enter the radiation terminal 200 through the fifth pipeline 201, and enter the fourth pipeline 122 through the sixth pipeline 202, and then flow into the outdoor heat exchanger 120 after being throttled again by the first electronic expansion valve 140, and after absorbing heat, it flows back to the compressor 110 through the first pipeline 111 after passing through the third pipeline 121, the c port and the s port of the first four-way valve 500.

[0157] When the convection terminal 300 is cooled, the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the c port of the first four-way valve 500, and then through the third pipeline 121 to enter the outdoor heat exchanger 120, and then flow through the fourth pipeline 122 and the seventh pipeline 311 in sequence to flow into the convection terminal 300, and then flow through the eighth pipeline 312, the e′ port and the s′ port of the second four-way valve 600 in sequence, and then flow back to the compressor 110 through the first pipeline 111 to cool the convection terminal 300.

[0158] When the convection terminal 300 is heated, the compressor 110 causes the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence, and then flow into the second four-way valve 600. After flowing through the d′ port and the e′ port of the second four-way valve 600, it passes through the eighth pipeline 312 to enter the convection terminal 300, and then flows through the seventh pipeline 311 and the fourth pipeline 122 in sequence and then flows into the outdoor heat exchanger 120. Then, it flows through the third pipeline 121, the c port and the s port of the first four-way valve 500 in sequence, and then flows back to the compressor 110 through the first pipeline 111, so that the convection terminal 300 is heated.

[0159] When the convection terminal 300 is heated and the outdoor heat exchanger 120 is defrosted, the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence. Part of the refrigerant enters the third pipeline 121 through the tenth pipeline 610, flows through the outdoor heat exchanger 120, and then flows into the flash igniter 700 through the fourth pipeline 122; part of the refrigerant flows through the d′ port and the c′ port of the second four-way valve 600 in sequence, enters the radiation terminal 200 through the fifth pipeline 201, and then flows into the flash igniter 700 through the sixth pipeline 202; the refrigerant flowing into the flash igniter 700 flows back to the compressor 110 through the ninth pipeline 701, the return air pipeline 820, and the first pipeline 111.

[0160] When the convection terminal 300 is heating and the compressor 110 is replenishing air, the gaseous refrigerant in the flasher 700 flows into the compressor 110 through the ninth pipeline 701 and the replenishing air pipeline 810 to increase the heating capacity of the air-conditioning system; the compressor 110 allows the refrigerant to flow from the compressor outlet through the second pipeline 112, the d port and the e port of the first four-way valve 500 in sequence, and then flow into the second four-way valve 600, and then flow through the d′ port and the e′ port of the second four-way valve 600 and enter the convection terminal 300 through the eighth pipeline 312, and then flow through the seventh pipeline 311 and the fourth pipeline 122 in sequence and then flow into the outdoor heat exchanger 120, and then flow through the third pipeline 121, the c port and the s port of the first four-way valve 500 in sequence and then flow back to the compressor 110 through the first pipeline 111.

[0161] It should be noted that when the air-conditioning system cools the indoor environment, the air-conditioning system is in cooling mode; when the air-conditioning system heats the indoor environment, the air-conditioning system is in heating mode; when the air-conditioning system replenishes air to the compressor 110, the air-conditioning system is in air-replenishing mode; when the air-conditioning system defrosts the outdoor heat exchanger 120, the air-replenishing mode and the defrost mode are performed selectively, and the cooling mode and the heating mode are performed selectively, the air-replenishing mode and the heating mode can be performed simultaneously, and the defrost mode and the heating mode can also be performed simultaneously.

[0162] It should also be noted that if Figure 1As shown, the air conditioning system further includes a controller 400, which is electrically connected to the compressor 110 and various valves to control the operation of the compressor 110 and the various valves. This belongs to the prior art in the field and will not be described in detail.

[0163] If the air conditioning system is only equipped with the radiation terminal 200, the air conditioning system can perform heating, defrosting and air supply working modes.

[0164] If the air conditioning system is only equipped with the convection terminal 300, the air conditioning system can perform heating, cooling, defrosting and air supply working modes.

[0165] If the air conditioning system is installed with the radiation terminal 200 and the convection terminal 300 at the same time, the air conditioning system can perform radiation heating, convection heating, convection cooling, defrosting and air replenishment working modes.

[0166] The above-mentioned air-conditioning system can be installed with only the radiation terminal 200, or with only the convection terminal 300, or with both the radiation terminal 200 and the convection terminal 300, so as to meet the actual needs of different users, so that the user can select the required heat exchange terminal without installing all the heat exchange terminals, thereby reducing the cost of installing the air-conditioning system for the user; and the radiation terminal 200 and the convection terminal 300 are arranged independently of each other, and even if only one of the heat exchange terminals is installed, it will not affect the normal operation of the air-conditioning system.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0168] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioning system, characterized in that: include: A compressor, comprising a compressor inlet and a compressor outlet, wherein the compressor inlet is connected to a first pipeline, and the compressor outlet is connected to a second pipeline; An outdoor heat exchanger, comprising a first opening and a second opening, wherein the first opening is connected to a third pipeline, and the second opening is connected to a fourth pipeline; A first four-way valve, which is connected to the compressor inlet through the first pipeline; the first four-way valve is connected to the compressor outlet through the second pipeline; the first four-way valve is connected to the first opening through the third pipeline; a heat exchange end, which includes a radiation end and / or a convection end; The radiation terminal includes a heating inlet and a heating outlet, the heating inlet is connected to a fifth pipeline, the heating outlet is connected to a sixth pipeline, and the sixth pipeline is in communication with the fourth pipeline; The convection end comprises a first convection port and a second convection port, the first convection port is connected to a seventh pipeline, an end of the seventh pipeline away from the convection end is connected to a fourth pipeline, and the second convection port is connected to an eighth pipeline; a second four-way valve, which is in communication with the heating inlet through the fifth pipeline, the second four-way valve is in communication with the convection end through the eighth pipeline, the second four-way valve is in communication with the compressor inlet through the first pipeline; the second four-way valve is in communication with the first four-way valve; The sixth pipeline and the seventh pipeline are connected in parallel to the fourth pipeline; the fifth pipeline and the eighth pipeline are connected in parallel to the second four-way valve.

2. The air conditioning system according to claim 1, characterized in that: The heat exchange end is a radiation end; the compressor causes the refrigerant to flow from the compressor outlet through the second pipeline and the first four-way valve in sequence, then enter the second four-way valve, then flow through the second four-way valve in sequence, then pass through the fifth pipeline to enter the radiation end, then flow through the sixth pipeline and the fourth pipeline in sequence to flow into the outdoor heat exchanger, then pass through the third pipeline and the first four-way valve in sequence, then flow back to the compressor through the first pipeline.

3. The air conditioning system according to claim 1, characterized in that: The heat exchange end is a convection end, and the convection end is used for cooling or heating; the compressor causes the refrigerant to flow from the compressor outlet through the second pipeline, the first four-way valve, the third pipeline, and enter the outdoor heat exchanger, and then flow through the fourth pipeline and the seventh pipeline in sequence to flow into the convection end, and then flow through the eighth pipeline, the second four-way valve, and then flow back to the compressor through the first pipeline, so that the convection end is cooled; The compressor causes the refrigerant to flow from the compressor outlet through the second pipeline and the first four-way valve in sequence, then flow into the second four-way valve, then flow through the second four-way valve and enter the convection end through the eighth pipeline, then flow through the seventh pipeline and the fourth pipeline in sequence, then flow into the outdoor heat exchanger, then flow through the third pipeline and the first four-way valve in sequence, then flow back to the compressor through the first pipeline, so that the convection end is heated.

4. The air conditioning system according to claim 1, characterized in that: The heat exchange end includes the radiation end and the convection end, and the radiation end and the convection end work selectively.

5. The air conditioning system according to claim 1, 2 or 4, characterized in that: The radiation ends are arranged in plurality, and the plurality of radiation ends are arranged in parallel with each other.

6. The air conditioning system according to claim 1, characterized in that: It also includes a flasher, which is arranged on the fourth pipeline. The flasher is connected to an air supply pipeline, and one end of the air supply pipeline away from the flasher is connected to the compressor.

7. The air conditioning system according to claim 6, characterized in that: The first four-way valve is also connected to a tenth pipeline, and the tenth pipeline is connected to the third pipeline; the flasher is connected to a return air pipeline, and one end of the return air pipeline away from the flasher is connected to the first pipeline.

8. The air conditioning system according to claim 7, characterized in that: The flasher is connected to a ninth pipeline, a three-way valve is arranged in the ninth pipeline, the air supply pipeline and the air return pipeline are connected in parallel to the three-way valve, and the air return pipeline is arranged in parallel with the air supply pipeline; the ninth pipeline is selectively connected to the air supply pipeline or the air return pipeline.

9. The air conditioning system according to claim 8, characterized in that: The third pipeline is provided with a first solenoid valve, and the first solenoid valve is located between the first four-way valve and the first opening; the second four-way valve is connected to the tenth pipeline, and the tenth pipeline is connected to the third pipeline, and the connection between the tenth pipeline and the third pipeline is located between the first solenoid valve and the outdoor heat exchanger; the tenth pipeline is provided with a second solenoid valve, and one of the first solenoid valve and the second solenoid valve is opened selectively.

10. An air conditioning system, characterized in that: include: A compressor, comprising a compressor inlet and a compressor outlet, wherein the compressor inlet is connected to a first pipeline, and the compressor outlet is connected to a second pipeline; An outdoor heat exchanger, comprising a first opening and a second opening, wherein the first opening is connected to a third pipeline, and the second opening is connected to a fourth pipeline; a first four-way valve, which is connected to the compressor outlet through the second pipeline; A radiation terminal, used for heating; it includes a heating inlet and a heating outlet, the heating inlet is connected to a fifth pipeline, the heating outlet is connected to a sixth pipeline, and the sixth pipeline is in communication with the fourth pipeline; a second four-way valve, which is connected to the heating inlet through the fifth pipeline, and the second four-way valve is connected to the first four-way valve; a flasher, which is arranged in the fourth pipeline, A return air pipeline, one end of which is connected to the flasher, and the other end of which is connected to the first pipeline; a tenth pipeline, one end of which is connected to the first four-way valve, and the other end of which is connected to the third pipeline; The compressor allows the refrigerant to flow from the compressor outlet through the second pipeline and the first four-way valve in sequence and then enter the second four-way valve, and part of the refrigerant flows through the third pipeline, flows through the outdoor heat exchanger, and then flows through the fourth pipeline into the flash unit; Part of the refrigerant flows through the second four-way valve in sequence and then enters the heating end through the fifth pipeline, and then flows into the flasher through the sixth pipeline; the refrigerant flowing into the flasher flows back to the compressor through the return air pipeline and the first pipeline to defrost the outdoor heat exchanger.

Images