Air conditioner loop and automobile

Abstract

The invention provides an air conditioner loop and an automobile, and relates to the field of automobile air conditioner loops. The air conditioner loop comprises a main loop and a heat return loop which are connected with each other, a first heat exchanger and a second heat exchanger are arranged in the main loop, and the main loop is communicated with a passenger compartment and an environment space; a plurality of four-way valves are arranged in the air conditioner loop, and the air conditioner loop can form a refrigerating loop or a heating loop by changing the communication mode of the four-way valves so as to meet the requirements for refrigerating in summer and heating in winter of a passenger compartment. In addition, a heat regeneration loop is introduced into the air conditioner loop, circulating air in a passenger compartment can be utilized, and therefore power consumption of a compressor can be reduced, refrigerating or heating capacity can be increased, the refrigerating coefficient under the high-temperature condition in summer and the heating coefficient under the low-temperature condition in winter are effectively increased, energy consumption of the air conditioner loop is reduced, and the economical efficiency of the whole vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile air conditioning circuits, and in particular to a dehumidification device for batteries and a battery dehumidification method. Background Art

[0002] In order to control the temperature more accurately, the air-conditioning systems in existing cars usually use electrically driven air-conditioning compressors and efficient control strategies. However, such air-conditioning systems consume a lot of energy while meeting the cooling and heating effects. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide an air-conditioning circuit and a car to solve the problem of high energy consumption of the air-conditioning system in existing cars.

[0004] According to the above-mentioned purpose, a first aspect of the present invention provides an air-conditioning circuit, in which a refrigerant circulates in the air-conditioning circuit, wherein the air-conditioning circuit includes a main circuit and a heat recovery circuit connected to each other, the main circuit is provided with a first heat exchanger and a second heat exchanger, and the main circuit is connected to the passenger compartment and the ambient space; a plurality of four-way valves are provided in the air-conditioning circuit, and the air-conditioning circuit can be formed into a refrigeration circuit or a heating circuit by changing the connection mode of the four-way valves.

[0005] Preferably, when the air-conditioning circuit is formed as a refrigeration circuit, the first heat exchanger is formed as a condenser and the second heat exchanger is formed as an evaporator; when the air-conditioning circuit is formed as a heating circuit, the first heat exchanger is formed as an evaporator and the second heat exchanger is formed as a condenser.

[0006] Preferably, the first heat exchanger and the second heat exchanger are both formed as two-effect heat exchangers.

[0007] Preferably, a plurality of three-way valves are also provided in the main circuit.

[0008] Preferably, the main circuit includes a first branch, and the first branch includes a first three-way valve, a second three-way valve, and a third three-way valve arranged in sequence; a first interface of the first three-way valve is communicated with the environmental space; a second interface of the first three-way valve is communicated with a first interface of the second three-way valve; a second interface of the second three-way valve is communicated with the passenger compartment; and a first interface of the third three-way valve is also communicated with the passenger compartment;

[0009] The second interface of the third three-way valve is communicated with the first section of the second heat exchanger, and the third interface of the third three-way valve is communicated with the second section of the second heat exchanger.

[0010] Preferably, the main circuit further comprises a second branch, wherein the second branch comprises a first four-way valve, a fourth three-way valve, a second four-way valve and a fifth three-way valve which are arranged in sequence;

[0011] The first interface of the first four-way valve is communicated with the first section of the first heat exchanger, the second interface of the first four-way valve is communicated with the third interface of the first three-way valve, the third interface of the first four-way valve is communicated with the second section of the first heat exchanger, and the fourth interface of the first four-way valve is communicated with the first interface of the fourth three-way valve;

[0012] The second interface of the fourth three-way valve is communicated with the third interface of the second three-way valve, and the third interface of the fourth three-way valve is communicated with the fourth interface of the second four-way valve;

[0013] The first interface of the second four-way valve is communicated with the second section of the second heat exchanger, the second interface of the second four-way valve is communicated with the first interface of the fifth three-way valve, and the third interface of the second four-way valve is communicated with the first section of the second heat exchanger;

[0014] The second interface of the fifth three-way valve is communicated with the first section of the first heat exchanger, and the third interface of the fifth three-way valve is communicated with the second section of the first heat exchanger.

[0015] Preferably, the main circuit further comprises a third branch, an expansion valve is provided on the third branch, and two ends of the expansion valve are respectively connected to the second section of the first heat exchanger and the first section of the second heat exchanger.

[0016] Preferably, the heat regenerator circuit comprises a regenerator, a third four-way valve and a compressor; the first interface and the second interface of the regenerator are respectively connected to the first section of the first heat exchanger and the second section of the second heat exchanger; the third interface of the regenerator is connected to the fourth interface of the third four-way valve; the fourth interface of the regenerator is connected to the second interface of the third four-way valve;

[0017] The first interface of the third four-way valve is communicated with the first interface of the compressor, and the third interface of the third four-way valve is communicated with the second interface of the compressor.

[0018] Preferably, when the air-conditioning circuit is formed as a refrigeration circuit, the first interface and the second interface of each of the four-way valves are connected and the third interface and the fourth interface are connected; when the air-conditioning circuit is formed as a heating circuit, the first interface and the fourth interface of each of the four-way valves are connected and the second interface and the third interface are connected.

[0019] According to a second aspect of the present invention, there is provided a vehicle, wherein the vehicle is provided with the air conditioning circuit as described above.

[0020] According to the air-conditioning circuit and automobile of the present invention, a plurality of four-way valves are arranged in the air-conditioning circuit. By changing the connection mode of the four-way valves, the air-conditioning circuit can be formed into a refrigeration circuit or a heating circuit to meet the needs of cooling the passenger compartment in summer and heating the passenger compartment in winter. In addition, the air-conditioning circuit introduces a heat recovery circuit and can utilize the circulating air in the passenger compartment, which can reduce the power consumption of the compressor and increase the cooling or heating amount, thereby effectively improving the refrigeration coefficient under high temperature conditions in summer and the heating coefficient under low temperature conditions in winter, thereby reducing the energy consumption of the air-conditioning circuit to improve the economy of the entire vehicle.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic diagram of an air conditioning circuit formed as a refrigeration circuit according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of an air conditioning circuit formed as a heating circuit according to an embodiment of the present invention;

[0025] Figure 3 It is a temperature entropy diagram of the air conditioning circuit according to the present invention and the air conditioning system in the prior art when in operation;

[0026] Figure 4 It is a pressure-enthalpy diagram of the air-conditioning circuit according to the present invention and the air-conditioning system in the prior art when they are in operation.

[0027] Icons: 11-first three-way valve; 12-second three-way valve; 13-third three-way valve; 14-fourth three-way valve; 15-fifth three-way valve; 16-expansion valve; 21-first four-way valve; 22-second four-way valve; 23-third four-way valve; 31-first heat exchanger; 32-second heat exchanger; 41-regenerator; 42-compressor; 51-environmental space; 52-passenger compartment. DETAILED DESCRIPTION

[0028] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0029] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0030] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0031] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0032] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0033] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0034] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0035] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0036] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0037] According to a first aspect of the present invention, there is provided an air conditioning circuit, such as Figure 1 to Figure 2 As shown, the air conditioning circuit in this embodiment includes a main circuit and a heat recovery circuit connected to each other, the main circuit is provided with a first heat exchanger 31 and a second heat exchanger 32, and the main circuit is connected with the passenger compartment 52 and the environmental space 51 (i.e., the space outside the vehicle); in addition, a plurality of three-way valves and four-way valves are provided in the air conditioning circuit, and the air conditioning circuit can be formed into a refrigeration circuit or a heating circuit by changing the connection mode of the four-way valve. Hereinafter, the specific connection relationship and position relationship of the above-mentioned components of the air conditioning circuit according to the present invention will be described in detail.

[0038] In this embodiment, the first heat exchanger 31 and the second heat exchanger 32 are both formed as two-effect heat exchangers, and when the air conditioning circuit is formed as a refrigeration circuit, the first heat exchanger 31 is formed as a (two-effect) condenser, and the second heat exchanger 32 is formed as a (two-effect) evaporator; when the air conditioning circuit is formed as a heating circuit, the first heat exchanger 31 is formed as a (two-effect) evaporator, and the second heat exchanger 32 is formed as a (two-effect) condenser. It should be noted that the first heat exchanger 31 and the second heat exchanger 32 are formed as a condenser or an evaporator, which means that according to the temperature of the gas correspondingly passed into the first heat exchanger 31 and the second heat exchanger 32, the two can play the role of a condenser or an evaporator to achieve the technical effect of heat exchange.

[0039] Specifically, the main circuit includes a first branch, and the first branch includes a first three-way valve 11, a second three-way valve 12, and a third three-way valve 13 arranged in sequence. Figure 1 to Figure 2 As shown, the first interface of the first three-way valve 11 is connected to the environmental space 51; the second interface of the first three-way valve 11 is connected to the first interface of the second three-way valve 12; the second interface of the second three-way valve 12 is connected to the passenger compartment 52; the first interface of the third three-way valve 13 is also connected to the passenger compartment 52; the second interface of the third three-way valve 13 is connected to the first section of the second heat exchanger 32, and the third interface of the third three-way valve 13 is connected to the second section of the second heat exchanger 32.

[0040] In addition, the main circuit also includes a second branch, which includes a first four-way valve 21, a fourth three-way valve 14, a second four-way valve 22 and a fifth three-way valve 15 arranged in sequence. Figure 1 to Figure 2 As shown, the first interface of the first four-way valve 21 is communicated with the first section of the first heat exchanger 31, the second interface of the first four-way valve 21 is communicated with the third interface of the first three-way valve 11, the third interface of the first four-way valve 21 is communicated with the second section of the first heat exchanger 31, and the fourth interface of the first four-way valve 21 is communicated with the first interface of the fourth three-way valve 14. In addition, the second interface of the fourth three-way valve 14 is communicated with the third interface of the second three-way valve 12, and the third interface of the fourth three-way valve 14 is communicated with the fourth interface of the second four-way valve 22.

[0041] In addition, the first interface of the second four-way valve 22 is connected to the second section of the second heat exchanger 32, the second interface of the second four-way valve 22 is connected to the first interface of the fifth three-way valve 15, and the third interface of the second four-way valve 22 is connected to the first section of the second heat exchanger 32; the second interface of the fifth three-way valve 15 is connected to the first section of the first heat exchanger 31, and the third interface of the fifth three-way valve 15 is connected to the second section of the first heat exchanger 31.

[0042] Furthermore, if Figure 1 to Figure 2As shown, the main circuit further includes a third branch, on which an expansion valve 16 is disposed, and both ends of the expansion valve 16 are respectively connected to the second section of the first heat exchanger 31 and the first section of the second heat exchanger 32 .

[0043] In this embodiment, the heat recovery circuit includes a heat regenerator 41, a third four-way valve 23 and a compressor 42. Figure 1 to Figure 2 As shown, the first interface and the second interface of the regenerator 41 are respectively connected to the first section of the first heat exchanger 31 and the second section of the second heat exchanger 32; the third interface of the regenerator 41 is connected to the fourth interface of the third four-way valve 23; the fourth interface of the regenerator 41 is connected to the second interface of the third four-way valve 23. The first interface of the third four-way valve 23 is connected to the first interface of the compressor 42, and the third interface of the third four-way valve 23 is connected to the second interface of the compressor 42.

[0044] It should be noted that, in this embodiment, Figure 1 to Figure 2 As shown, the first interface of each component is marked as a, the second interface is marked as b, the third interface is marked as c, and the fourth structure is marked as d. When the air conditioning circuit is formed as a refrigeration circuit, the first interface of each four-way valve is connected to the second interface and the third interface is connected to the fourth interface; when the air conditioning circuit is formed as a heating circuit, the first interface of each four-way valve is connected to the fourth interface and the second interface is connected to the third interface.

[0045] When the air conditioning system is formed into a summer refrigeration circuit, Figure 1 As shown, the first part of the hot air in the vehicle exterior environment space 51 flows through the first interface, the second interface of the first three-way valve 11 and the first interface of the second three-way valve 12 in sequence, and the hot air in the passenger compartment 52 enters the second three-way valve 12 through the second interface of the second three-way valve 12. The above two streams of hot air are mixed and flow out from the third interface of the second three-way valve 12 and enter the fourth three-way valve 14 through the second interface of the fourth three-way valve 14. The mixed hot air is divided into two parts, the first part of which flows through the third interface of the fourth three-way valve 14, the fourth interface and the third interface of the second four-way valve 22 in sequence to flow into the first section of the second heat exchanger 32; the second part of which flows through the first interface of the fourth three-way valve 14, the fourth interface and the third interface of the first four-way valve 21 in sequence to flow into the second section of the first heat exchanger 31. In addition, the second part of the hot air in the vehicle exterior environment space 51 flows through the first interface, the third interface of the first three-way valve 11, the second interface and the first interface of the first four-way valve 21 in sequence to flow into the first section of the first heat exchanger 31.

[0046] Further, the first and second sections of the first heat exchanger 31 respectively output gases. The two gases respectively enter the fifth three-way valve 15 through the second and first interfaces of the fifth three-way valve 15, and after merging, they sequentially flow through the first interface of the fifth three-way valve 15, the second interface of the second four-way valve 22, and the first interface to flow into the second section of the second heat exchanger 32.

[0047] The liquid refrigerant flows into the second heat exchanger 32. The refrigerant exchanges heat with the mixed hot air of the passenger compartment 52 and the environmental space 51 in the first section of the second heat exchanger 32, and then the refrigerant exchanges heat with the (mixed hot air after heat exchange in the first heat exchanger 31) in the second section of the second heat exchanger 32. The two mixed hot airs are discharged into the passenger compartment 52 through the third three-way valve 13 after heat exchange in the second heat exchanger 32 to achieve refrigeration of the passenger compartment 52.

[0048] Furthermore, the refrigerant after heat exchange in the second heat exchanger 32 sequentially passes through the second interface, the fourth interface of the recuperator 41, the second interface, the first interface of the third four-way valve 23, and the first interface of the compressor 42 to flow into the compressor 42; after the refrigerant forms a high-temperature and high-pressure gas in the compressor 42, it sequentially flows through the second interface of the compressor 42, the third interface, the fourth interface of the third four-way valve 23, and the third interface of the recuperator 41 to flow into the recuperator 41 again for heat release, and then the gaseous refrigerant flows into the first heat exchanger 31 for heat release again. After secondary heat release, the refrigerant flows into the second heat exchanger 32 through the expansion valve 16 to achieve the above refrigeration cycle.

[0049] In this embodiment, when the air-conditioning circuit forms the above refrigeration circuit, since there is phase change heat exchange between the first section of the second heat exchanger 32 and the second section of the first heat exchanger 31, these two sections are the main heat exchange sections and undertake most of the heat exchange amount. As Figure 3 shown, the working process of the existing air-conditioning system is 1-2-5-6, while the working process of the air-conditioning circuit in this embodiment is optimized to 1-2”-3-4; in addition, in Figure 4 , the projection length of the process line on the abscissa represents the refrigeration (heating) capacity, the heat absorption (release) amount, and the work amount. It can be seen that the refrigeration capacity qc increases from q 1-2 to q 1-2” , the work done by the compressor 42, w, decreases from w 2-5 to w 2”-3 , and the coefficient of performance ε (ε = q c / w) increases, that is, this air-conditioning circuit can effectively improve the refrigeration performance and reduce the system energy consumption. At the same time, the pressure p2 of the refrigerant before compression = p 2” , the pressure p3 after compression < p5, and the compression ratio π (π = p h / p l) is reduced; preferably, an impeller compressor can be used to increase the system flow and improve the refrigeration efficiency.

[0050] Similarly, when the air conditioning system is formed into a winter heating circuit, Figure 2 As shown, the first part of the cold air in the vehicle exterior environment space 51 flows through the first interface, the second interface of the first three-way valve 11 and the first interface of the second three-way valve 12 in sequence, and the cold air in the passenger compartment 52 enters the second three-way valve 12 through the second interface of the second three-way valve 12. The two streams of cold air are mixed and flow out from the third interface of the second three-way valve 12 and enter the fourth three-way valve 14 through the second interface of the fourth three-way valve 14. The mixed cold air is divided into two parts, the first part of which flows through the third interface of the fourth three-way valve 14, the fourth interface of the second four-way valve 22 and the first interface in sequence to flow into the second section of the second heat exchanger 32; the second part of which flows through the first interface of the fourth three-way valve 14, the fourth interface of the first four-way valve 21 and the first interface in sequence to flow into the first section of the first heat exchanger 31. In addition, the second part of the cold air in the vehicle exterior environment space 51 flows through the first interface, the third interface of the first three-way valve 11, the second interface and the third interface of the first four-way valve 21 in sequence to flow into the second section of the first heat exchanger 31.

[0051] Furthermore, the first section and the second section of the first heat exchanger 31 respectively output gas, and the two gases enter the fifth three-way valve 15 through the second interface and the first interface of the fifth three-way valve 15 respectively, and then flow through the first interface of the fifth three-way valve 15, the second interface and the third interface of the second four-way valve 22 in sequence after merging, so as to flow into the first section of the second heat exchanger 32. The two cold airs flowing into the second heat exchanger 32 are converted into hot air after heat exchange in the second heat exchanger 32, and are discharged into the passenger compartment 52 through the third three-way valve 13, so as to achieve heating of the passenger compartment 52.

[0052] Furthermore, the refrigerant flows into the first heat exchanger 31, exchanges heat with the cold air in the first heat exchanger 31 and flows into the heat recovery circuit, the refrigerant is formed into a high-temperature and high-pressure gas after passing through the compressor 42, and then flows into the second heat exchanger 32 through the heat regenerator 41 again to exchange heat with the above-mentioned mixed cold air; then, it flows into the first heat exchanger 31 through the expansion valve 16, thereby realizing the above-mentioned circulation process.

[0053] In this embodiment, when the air conditioning circuit is formed as the above-mentioned heating circuit, Figure 3 As shown, the working process of the existing air conditioning system is 1-2-5-6, while the working process of the air conditioning loop in this embodiment is optimized to 1-2"-3-4; in addition, Figure 4 It can be seen that the heating capacity q H By q 5-6 Increase to q 4-3”, the work w done by the compressor 42 changes from w 2-5 to w 2”-3 , and the heating coefficient ε (ε = q H / w) increases. That is, the air-conditioning circuit of the present invention can effectively improve the heating performance and reduce the system energy consumption. At the same time, the pressure p2 before refrigerant compression is p 2” , the pressure p3 after compression is less than p5, and the compression ratio π (π = p h / p l ) decreases; preferably, a vane compressor can be used to increase the system flow rate and improve the heating efficiency.

[0054] According to the air-conditioning circuit of the present invention as described above, a plurality of four-way valves are provided in the air-conditioning circuit. By changing the connection mode of the four-way valves, the air-conditioning circuit can be formed into a refrigeration circuit or a heating circuit to meet the needs of the occupant compartment 52 for summer cooling and winter heating; in addition, the present air-conditioning circuit introduces a regenerative circuit and can utilize the circulating air of the occupant compartment 52, so that the power consumption of the compressor 42 can be reduced and the refrigeration or heating capacity can be increased, thereby effectively improving the refrigeration coefficient under high temperature conditions in summer and the heating coefficient under low temperature conditions in winter, and further reducing the energy consumption of the air-conditioning circuit to improve the fuel economy of the whole vehicle.

[0055] According to a second aspect of the present invention, a vehicle is provided, wherein the vehicle is provided with the air-conditioning circuit as described above.

[0056] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed in the present application can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be the protection scope of the claims.

Claims

1. An air conditioning circuit in which a refrigerant circulates, characterized in that: The air-conditioning circuit includes a main circuit and a heat recovery circuit connected to each other, wherein the main circuit is provided with a first heat exchanger and a second heat exchanger and the main circuit is connected with the passenger compartment and the environmental space; a plurality of four-way valves are provided in the air-conditioning circuit, and the air-conditioning circuit can be formed into a refrigeration circuit or a heating circuit by changing the connection mode of the four-way valves.

2. The air conditioning circuit according to claim 1, characterized in that: When the air conditioning circuit is formed as a refrigeration circuit, the first heat exchanger is formed as a condenser and the second heat exchanger is formed as an evaporator; when the air conditioning circuit is formed as a heating circuit, the first heat exchanger is formed as an evaporator and the second heat exchanger is formed as a condenser.

3. The air conditioning circuit according to claim 2, characterized in that: The first heat exchanger and the second heat exchanger are both formed as two-effect heat exchangers.

4. The air conditioning circuit according to claim 3, characterized in that: A plurality of three-way valves are also arranged in the main circuit.

5. The air conditioning circuit according to claim 4, characterized in that: The main circuit includes a first branch, and the first branch includes a first three-way valve, a second three-way valve, and a third three-way valve arranged in sequence; the first interface of the first three-way valve is communicated with the environmental space; the second interface of the first three-way valve is communicated with the first interface of the second three-way valve; the second interface of the second three-way valve is communicated with the passenger compartment; the first interface of the third three-way valve is also communicated with the passenger compartment; The second interface of the third three-way valve is communicated with the first section of the second heat exchanger, and the third interface of the third three-way valve is communicated with the second section of the second heat exchanger.

6. The air conditioning circuit according to claim 5, characterized in that: The main circuit further includes a second branch, which includes a first four-way valve, a fourth three-way valve, a second four-way valve and a fifth three-way valve arranged in sequence; The first interface of the first four-way valve is communicated with the first section of the first heat exchanger, the second interface of the first four-way valve is communicated with the third interface of the first three-way valve, the third interface of the first four-way valve is communicated with the second section of the first heat exchanger, and the fourth interface of the first four-way valve is communicated with the first interface of the fourth three-way valve; The second interface of the fourth three-way valve is communicated with the third interface of the second three-way valve, and the third interface of the fourth three-way valve is communicated with the fourth interface of the second four-way valve; The first interface of the second four-way valve is communicated with the second section of the second heat exchanger, the second interface of the second four-way valve is communicated with the first interface of the fifth three-way valve, and the third interface of the second four-way valve is communicated with the first section of the second heat exchanger; The second interface of the fifth three-way valve is communicated with the first section of the first heat exchanger, and the third interface of the fifth three-way valve is communicated with the second section of the first heat exchanger.

7. The air conditioning circuit according to claim 6, characterized in that: The main circuit further includes a third branch, on which an expansion valve is disposed, and two ends of the expansion valve are respectively connected to the second section of the first heat exchanger and the first section of the second heat exchanger.

8. The air conditioning circuit according to claim 1, characterized in that: The regenerative heat circuit includes a regenerator, a third four-way valve and a compressor; the first interface and the second interface of the regenerator are respectively connected to the first section of the first heat exchanger and the second section of the second heat exchanger; the third interface of the regenerator is connected to the fourth interface of the third four-way valve; the fourth interface of the regenerator is connected to the second interface of the third four-way valve; The first interface of the third four-way valve is communicated with the first interface of the compressor, and the third interface of the third four-way valve is communicated with the second interface of the compressor.

9. The air conditioning circuit according to claim 1, characterized in that: When the air-conditioning circuit is formed as a refrigeration circuit, the first interface and the second interface of each four-way valve are connected and the third interface and the fourth interface are connected; when the air-conditioning circuit is formed as a heating circuit, the first interface and the fourth interface of each four-way valve are connected and the second interface and the third interface are connected.

10. An automobile, characterized in that: The vehicle is provided with an air conditioning circuit as claimed in any one of claims 1 to 9.

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