CN112856860A

CN112856860A - Heat exchanger assembly and thermal management system

Info

Publication number: CN112856860A
Application number: CN201911170240.5A
Authority: CN
Inventors: 董军启; 刘冬; 朱坤军; 董海峰
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2021-05-28
Anticipated expiration: 2039-11-26
Also published as: CN112856860B

Abstract

The application provides a heat exchanger subassembly, including first heat exchanger and switching-over choke valve, first heat exchanger and switching-over choke valve are connected structure as an organic whole. The first heat exchanger comprises a first collecting pipe, a second collecting pipe and a plurality of heat exchange pipes which are connected between the first collecting pipe and the second collecting pipe and arranged in parallel, and the heat exchange pipes are communicated with the first collecting pipe and the second collecting pipe. The first collecting pipe and the second collecting pipe are provided with at least one cavity, the pipe wall of one cavity is provided with a first interface, the pipe wall of the other cavity is provided with a second interface, and the reversing throttle valve is provided with a first port in butt joint with the second interface, a second port connected with a system pipeline and a third port connected with a second heat exchanger. The present application further provides a thermal management system including the above heat exchanger assembly. The present application simplifies the structure of the thermal management system.

Description

Heat exchanger assembly and thermal management system

Technical Field

The application relates to the technical field of heat exchangers, in particular to a heat exchanger assembly and a heat management system.

Background

The heat exchanger in the heat pump system is suitable for different working modes, and has important functions of serving as a condenser and an evaporator. The related heat exchanger is used as an evaporator in a heating mode, the heat exchange performance is reduced after frosting, in order to realize the high efficiency of the heat pump system evaporator, the current heat exchanger needs to be switched to other heat exchangers for use after frosting, and the other heat exchangers can still realize the function of the evaporator, thereby realizing effective heating.

In the technology known by the inventor, the heat management system needs to realize the connection of the heat exchangers and the switching of the heat exchangers through various complicated valves, pipelines and the like, so that the system structure is complicated.

Disclosure of Invention

One aspect of the present application provides a heat exchanger assembly that is compact and facilitates simplifying the structure of a thermal management system.

In order to achieve the purpose, the following technical scheme is adopted in the application: a heat exchanger assembly comprises a first heat exchanger and a reversing throttle valve, wherein the first heat exchanger and the reversing throttle valve are connected into an integral structure, the first heat exchanger comprises a first collecting pipe, a second collecting pipe and a plurality of heat exchange pipes which are arranged in parallel and connected between the first collecting pipe and the second collecting pipe, the heat exchange tube is communicated with the first collecting pipe and the second collecting pipe, the first collecting pipe and the second collecting pipe are both provided with at least one chamber, wherein the pipe wall of one chamber is provided with a first interface, the pipe wall of the other chamber is provided with a second interface, the chamber with the first interface on the pipe wall is communicated with the chamber with the second interface on the pipe wall through the inner cavity of the heat exchange pipe, the reversing throttle valve is provided with a first port, a second port and a third port, the first port is used for being in butt joint with the second port, and the second port and the third port are respectively used for being in butt joint with an external element; in a first working state, a third port of the reversing throttle valve is closed, a first valve body channel formed by the largest valve port opening degree is arranged between a first port and a second port of the reversing throttle valve, and the first interface, the heat exchange tube, the second interface, the first port, the first valve body channel and the second port are communicated; in a second working state, a third port of the reversing throttle valve is closed, a second valve body passage is arranged between a second port and a first port of the reversing throttle valve, the flow volume of the second valve body passage is smaller than that of the first valve body passage, and the second port, the second valve body passage, the first port, a second interface, a heat exchange pipe and the first interface are communicated; in a third operating state, the first port of the directional throttle valve is closed, a third valve body passage is arranged between the second port and the third port of the directional throttle valve, the flow volume of the third valve body passage is smaller than that of the first valve body passage, and the second port, the third valve body passage and the third port are communicated.

The heat exchanger assembly comprises a first heat exchanger, a second heat exchanger, a compressor, an indoor condenser, an indoor evaporator, a first throttling element and a system pipeline connected between the at least two components, wherein the heat management system comprises a first heat exchange mode, a second heat exchange mode and a frosting treatment mode;

in the first heat exchange mode, the heat exchanger assembly operates in a first working state, a first interface serves as a refrigerant inlet, and a second interface serves as a refrigerant outlet, wherein the compressor, the heat exchanger assembly, the first throttling element and the indoor evaporator are communicated to form a loop, and the heat exchanger assembly serves as a condenser in the heat management system;

in the second heat exchange mode, the heat exchanger assembly operates in a second working state, the second port serves as a refrigerant inlet, the first interface serves as a refrigerant outlet, the compressor, the indoor condenser and the heat exchanger assembly are communicated to form a loop, and the heat exchanger assembly serves as a second throttling element and an evaporator in the heat management system;

in the frosting treatment mode, the heat exchanger assembly operates in a third working state, the second port serves as a refrigerant inlet, the third port serves as a refrigerant outlet, the compressor, the indoor condenser, the heat exchanger assembly and the second heat exchanger are communicated to form a loop, and the heat exchanger assembly serves as a third throttling element in the heat management system.

The heat exchange assembly integrates the reversing throttle valve and the first heat exchanger, the integrated heat exchanger assembly has multiple working states, multiple working modes of a heat management system can be adapted, and the heat exchanger assembly is compact in structure and beneficial to simplifying the system structure.

Drawings

Fig. 1 is a perspective assembly view of a first embodiment of a heat exchanger assembly according to the present application.

FIG. 2 is an exploded perspective view of a first angle of an embodiment of a heat exchanger assembly according to the present application.

FIG. 3 is a second angled exploded perspective view of an embodiment of a heat exchanger assembly according to the present application.

Fig. 4 is a partially enlarged view of fig. 3.

FIG. 5 is a third angle exploded view of the heat exchanger assembly embodiment of the present application.

Fig. 6 is a partially enlarged view of fig. 5.

Fig. 7 is a perspective assembly view of a second embodiment of a heat exchanger assembly according to the present application.

Fig. 8 is an exploded perspective view of a second embodiment of a heat exchanger assembly according to the present application.

FIG. 9 is an exploded perspective view of another angle of an embodiment of a heat exchanger assembly according to the present application.

Fig. 10 is a schematic view of the flow of refrigerant in the heat exchanger package of the present application in a first operating condition.

Fig. 11 is a schematic flow diagram of refrigerant in a system of the present application in a first heat exchange mode.

Fig. 12 is a schematic view of the flow of refrigerant in the heat exchanger package of the present application in a second operating condition.

Fig. 13 is a schematic flow diagram of refrigerant in a system of the present application in a second heat exchange mode.

Fig. 14 is a schematic view of the flow of refrigerant in the heat exchanger package of the present application during a third operating condition.

Fig. 15 is a schematic flow diagram of refrigerant in a system for use in the present application in a frosting treatment mode.

Detailed Description

Referring to fig. 1 to 9, a heat exchanger assembly 100 includes a first heat exchanger 1 and a reversing throttle valve 2, wherein the first heat exchanger 1 and the reversing throttle valve 2 are connected as an integral structure. The first heat exchanger 1 includes a first collecting pipe 11, a second collecting pipe 12, and a plurality of heat exchange tubes 13 arranged in parallel and connected between the first collecting pipe 11 and the second collecting pipe 12. The heat exchange tube 13 is communicated with the first collecting pipe 11 and the second collecting pipe 12. The first collecting pipe 11 and the second collecting pipe 12 both have at least one chamber, the pipe wall of one chamber of the first collecting pipe 11 is provided with a first interface 15, and the pipe wall of the other chamber is provided with a second interface 16, so that at least one flow path of refrigerant is formed between the first collecting pipe 11 and the second collecting pipe 12. The reversing throttle 2 has a first port 211 interfacing with the second interface 16, a second port 212 connected to the system line 3, and a third port 213 connected to the second heat exchanger 4.

Referring to fig. 1 to 9 and fig. 10 and 11, the heat exchanger assembly 100 is in the first operating state, the third port 213 of the reversing throttle valve 2 is closed, and a first valve body passage formed by the largest valve port opening degree is formed between the first port 211 and the second port 212 of the reversing throttle valve 2. The first port 15 communicates with the second port 212 via the at least one flow path of the first heat exchanger 1, the second port 16, the first port 211, and the first valve body passage, and a refrigerant circuit in one implementation direction corresponding to the operation state is: the fluid flows into the first heat exchanger 1 from the first interface 15, passes through at least one flow path, reaches the second interface 16, enters the reversing throttle valve 2 through the first port 211, and flows out to the second port 212 through the first valve body channel to the system pipeline 3.

Referring to fig. 1 to 9 and fig. 12 and 13, the heat exchanger assembly 100 is in the second working state, the third port 213 of the reversing throttle valve 2 is closed, a second valve body passage is arranged between the second port 212 and the first port 211 of the reversing throttle valve 2, and the flow volume of the second valve body passage is smaller than that of the first valve body passage. The second port 212 communicates with the first port 15 through the second valve body passage, the first port 211, the second port 16, and the at least one flow path of the first heat exchanger 1, and the refrigerant circuit in one implementation direction corresponding to the operation state is: flows into the reversing throttle valve 2 from the second port 212, flows out to the first port 211 through the second valve body channel, enters the first heat exchanger 1 from the second interface 16, and flows out from the first interface 15 after passing through at least one flow path.

Referring to fig. 1 to 9 and fig. 14 and 15, the heat exchanger assembly 100 is in the third operating state, the first port 211 of the reversing throttle valve 2 is closed, a third valve body passage is provided between the second port 212 and the third port 213 of the reversing throttle valve 2, and the flow volume of the third valve body passage is smaller than that of the first valve body passage. The second port 212 is not connected to the first heat exchanger 1, but is connected to the third port 213 via a third valve body passage, and the working state corresponds to a refrigerant circuit in one implementation direction as follows: flows from the second port 212 into and not through the first heat exchanger 1 but flows to the second heat exchanger 4 via the third port 213.

Referring to fig. 3 to 6, in an embodiment, the reversing throttle valve 2 is a three-way ball valve, and the three-way ball valve includes a valve seat 21, a ball 22 located in the valve seat 21, and a valve rod 23 connected to the ball 22. The first, second and

third ports

211, 212 and 213 are disposed on the valve seat 21, the ball 22 has an inlet 221 and an outlet 222, the valve rod 23 drives the ball 22 to rotate in the valve seat 21 to change the contact ratio between the inlet 221 and the outlet 222 and the first, second and

third ports

211, 212 and 213, so as to realize the switching of the three-way ball valve between the first, second and third working states respectively corresponding to the above three modes.

Referring to fig. 1 to 6, in the first working state, an initial 0 ° angle is formed between the valve seat 21 and the ball 22, where the inlet 221 completely coincides with the first port 211 and the outlet 222 completely coincides with the second port 212, when the valve rod 23 drives the ball 22 to deflect counterclockwise in the valve seat 21 by the first angle, the direction-changing throttle valve 2 is switched to the second working state, where the inlet 221 partially coincides with the first port 211 and the outlet 222 partially coincides with the second port 212. When the valve rod 23 drives the ball 22 to continue deflecting to the second angle in the valve seat 21 along the counterclockwise direction, the direction-changing throttle valve 2 is switched to the third working state, the inlet 221 partially coincides with the second port 212, and the outlet 222 partially coincides with the third port 213.

In a specific embodiment, the first angle is between 1 ° and 44 °, and the second angle is between 91 ° and 144 °.

Regarding the installation manner of the reversing throttle valve 2 and the first collecting pipe 11, in the first embodiment, the reversing throttle valve 2 is connected with the first collecting pipe 11 by welding to form an integral structure, specifically refer to fig. 1 to 6. The first port 211 and the second port 16 are aligned, and the side surface of the reversing throttle valve 2 welded to the first collecting pipe 11 is an arc surface 20 matched with the pipe wall of the first collecting pipe 11. The first embodiment is an integral connection mode without the pressing plate 5, which is beneficial to reducing the processing procedures and is simpler in process. It is necessary to braze the reversing throttle valve 2 directly to the first header 11.

Regarding the installation manner of the reversing throttle valve 2 and the first collecting pipe 11, in the second embodiment, the first heat exchanger 1 further includes a pressure plate 5, and refer to fig. 7 to 9 specifically. The pressure plate 5 is located between the first collecting pipe 11 and the reversing throttle valve 2, the pressure plate 5 has a communication passage 50 for communicating the first port 211 with the second port 16, and the reversing throttle valve 2 is mounted to the first collecting pipe 11 through the pressure plate 5. The second embodiment is a split type which is connected through the pressing plate 5, the pressing plate 5 and the collecting pipe are firstly brazed, and the reversing throttle valve 2 is locked to the pressing plate 5 through the bolt after brazing, although one more procedure is adopted, the welding is convenient, and the welding difficulty caused by the increase of the size of the reversing throttle valve 2 is favorably reduced.

In an alternative embodiment, a fin (not shown) is disposed between the two adjacent heat exchange tubes 13. The fins serve to accelerate the heat exchange.

In one embodiment, a partition 14 is disposed in at least one of the two tube cavities of the first header 11 and the second header 12, the partition 14 divides the tube cavity of the corresponding header into a plurality of chambers that are not communicated with each other, and the first connector 15 and the second connector 16 are located on the tube walls of two different chambers. The flow path of the refrigerant can be increased by dividing the tube cavities of the first header 11 or/and the second header 12 by the partition 14.

Referring to fig. 1 to 9, in an embodiment of the present invention, a partition 14 is disposed in a tube cavity of the first header 11, so that the first header 11 is a dual chamber, one side of the partition 14 is a first chamber, the other side of the partition 14 is a second chamber, the tube cavity of the second header 12 has no partition, so that the second header 12 has only one chamber, the first interface 15 and the second interface 16 are both located on the first header 11, the first interface 15 is located on a tube wall of the first chamber, and the second interface 16 is located on a tube wall of the second chamber, so that two flows of refrigerant are formed between the first interface 15 and the second header 12 of the first header 11 and between the second header 12 and the second interface 16.

The thermal management system provided by the present application may be specifically an automotive air-conditioning thermal management system, please refer to fig. 11, 13 and 15, and the thermal management system provided by the present application includes the heat exchanger assembly 100 provided in the above embodiment, and further includes the second heat exchanger 4, the compressor 6, the indoor condenser 7, the indoor evaporator 8 and the first throttling element 9. The system pipeline 3 can be connected between the exhaust port of the compressor 6 and the inlet end of the indoor condenser 7, between the outlet end of the indoor condenser 7 and the first interface 15 of the first heat exchanger 1, between the second port 212 of the reversing throttle valve 2 and the inlet end of the indoor evaporator 8, between the outlet end of the indoor evaporator 8 and the air inlet of the compressor 6, between the third port 213 of the reversing throttle valve 2 and the inlet end of the second heat exchanger 4, and between the outlet end of the second heat exchanger 4 and the air inlet of the compressor 6.

The heat management system comprises a first heat exchange mode, a second heat exchange mode and a frosting treatment mode.

In a first heat exchange mode (a cooling mode), the heat exchanger assembly 100 operates in a first working state, the first port 15 serves as a refrigerant inlet, and the second port 212 serves as a refrigerant outlet, wherein the compressor 6, the heat exchanger assembly 100, the first throttling element 9, and the indoor evaporator 8 are communicated through the system pipeline 3 to form a loop, and the heat exchanger assembly 100 serves as a condenser in the thermal management system.

In a specific embodiment, referring to fig. 11, the thermal management system may further include a four-way reversing valve, a damper, a gas-liquid separator, a battery cooling circulation loop, a motor cooling circulation loop, and the like, and specifically, in fig. 11, the thermal management system is in a cooling mode, a compressor 6 compresses a low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant flows out from an exhaust port of the compressor 6 to an indoor condenser 7, but since the indoor damper is closed at this time, the indoor condenser 7 cannot effectively exchange heat with air and cannot function as a condenser, the refrigerant leaves the indoor condenser 7 and then enters a heat exchanger assembly 100 (an outdoor heat exchanger/front end module of an automotive air conditioner) through the guiding function of the four-way reversing valve, a first interface 15 serves as a refrigerant inlet, the high-temperature and high-pressure gaseous, the high-temperature high-pressure gaseous refrigerant is condensed to release heat to become a low-temperature refrigerant to release heat, the released heat is brought into the outdoor ambient air by air flow, the refrigerant is subjected to phase change and condensed to become a liquid or gas-liquid two-phase refrigerant, then the liquid or gas-liquid two-phase refrigerant passes through the reversing throttle valve 2 working in a full-through state and finally leaves the heat exchanger assembly 100 from the second port 212, and then enters the first throttling element 9 to be expanded, the temperature and the pressure are reduced to become the low-temperature low-pressure refrigerant, the low-temperature low-pressure refrigerant after throttling enters the indoor evaporator 8 to evaporate and absorb the heat of the air around the indoor evaporator 8, so that the temperature of the air around the indoor evaporator 8 is reduced, and under the action of the air flow, the cold air enters. At this time, the first throttling element 9 is provided to quickly reach the throttled refrigerant to the interior evaporator 8 for absorbing heat, and of course, if the inlet of the interior evaporator 8 is close to the second port 212 of the reversing throttle valve 2, the first throttling element 9 may be omitted, that is, the heat exchanger assembly 100 functions as both a condenser and a throttling element, and the refrigerant finally returns to the compressor 6 to complete one cycle.

In a second heat exchange mode (heating mode), the heat exchanger assembly 100 operates in a second working state, the second port 212 serves as a refrigerant inlet, and the first port 15 serves as a refrigerant outlet, wherein the compressor 6, the indoor condenser 7 and the heat exchanger assembly 100 are communicated through the system pipeline 3 to form a loop, and the heat exchanger assembly 100 serves as a second throttling element and an evaporator in the thermal management system.

In a specific embodiment, referring to fig. 13, the thermal management system may further include components related to a four-way reversing valve, a damper, a gas-liquid separator, a battery cooling circulation loop, a motor cooling loop, and the like, specifically, in fig. 13, a compressor 6 compresses a low-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant exits from an exhaust port of the compressor 6 to reach an indoor condenser 7, the high-temperature high-pressure gaseous refrigerant exchanges heat with an air flow in the indoor condenser 7, the refrigerant condenses and releases heat in the indoor condenser 7, hot air enters a channel of an air conditioning box and is sent into a room to increase the indoor temperature, the refrigerant exits from the indoor condenser 7 and enters the heat exchanger component 100 (an outdoor heat exchanger/front end module of an automotive air conditioner) through the guiding effect of the four-way reversing valve, the refrigerant firstly enters the reversing throttle valve 2 for throttling expansion, is cooled and depressurized to become a low-temperature and low-pressure refrigerant, then flows into the first heat exchanger 1 for absorbing the heat of the air around the first heat exchanger 1, is evaporated and absorbs heat, finally leaves the heat exchanger assembly 100 from the first interface 15, and then enters the second heat exchanger 4 through the guiding action of the four-way reversing valve, because the battery cooling circulation loop/motor cooling loop does not work at the moment, no cooling liquid passes through the second heat exchanger 4, the second heat exchanger 4 does not play a heat exchange role, the heat exchange effect of the refrigerant in the second heat exchanger 4 can be ignored, and the refrigerant returns to the compressor 6 after leaving from the second heat exchanger 4, so that one-time circulation is completed.

In the mode of frosting treatment, when the indoor heating is performed, for example, the current ambient temperature is-5 ℃ to 5 ℃, the surface of the first heat exchanger 1 (outdoor heat exchanger) is easy to be frosted, and the first heat exchanger 1 cannot continue to function as an evaporator after frosting. At this time, another heat exchanger in the system is required to continue to serve as an evaporator to realize the heating function. In this operation mode, the heat exchanger assembly 100 operates in a third operation state, the second port 212 serves as a refrigerant inlet, and the third port 213 serves as a refrigerant outlet, wherein the compressor 6, the interior condenser 7, the heat exchanger assembly 100, and the second heat exchanger 4 are communicated with each other through the system pipeline 3 to form a loop, and the heat exchanger assembly 100 serves as a third throttling element in the thermal management system. As shown in fig. 15, the compressor 6 compresses low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant leaves from the exhaust port of the compressor 6 to reach the indoor condenser 7, the high-temperature high-pressure gaseous refrigerant exchanges heat with air flow in the indoor condenser 7, the refrigerant condenses and releases heat in the indoor condenser 7, hot air enters the channel of the air conditioning box and is sent into the room to increase the indoor temperature, the refrigerant leaves the indoor condenser 7 and then enters the heat exchanger assembly 100 through the guiding function of the four-way reversing valve, the second port 212 serves as a refrigerant inlet, the refrigerant enters the reversing throttle valve 2 for throttling expansion, the temperature and pressure are reduced to low-temperature low-pressure refrigerant, the third port 213 serves as a refrigerant outlet, then the low-temperature low-pressure refrigerant flows into the second heat exchanger 4 to absorb heat of the cooling liquid, one cycle is completed. The second heat exchanger 4 is a plate heat exchanger or a shell-and-tube heat exchanger (a shell is wrapped outside the microchannel heat exchanger), because the second heat exchanger 4 is connected with the battery/motor circulation loop, a flow path connected with the third port 213 of the second heat exchanger 4 circulates a refrigerant, and a loop connected with the battery/motor circulation loop circulates a cooling liquid, heat generated by the battery/motor in the operation process exchanges the cooling liquid into the refrigerant through the second heat exchanger 4, and evaporation of a low-temperature refrigerant is realized. Thus, the second heat exchanger 4 acts as an evaporator in this mode, and the reversing throttle valve 2 effects the reversing and throttling action.

The heat exchanger assembly 100 provided herein facilitates simplifying the thermal management system structure by integrating the reversing throttle valve 2 with the outdoor first heat exchanger 1.

The above embodiments are only used for illustrating the present application and not for limiting the technical solutions described in the present application, and the present application should be understood based on the descriptions of directions such as "front", "back", "left", "right", "upper", "lower", etc. for those skilled in the art, and although the present application has been described in detail in the present application with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still make modifications or equivalent substitutions on the present application, and all technical solutions and modifications thereof that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A heat exchanger assembly (100), characterized by: including first heat exchanger (1) and switching-over choke valve (2), first heat exchanger (1) and switching-over choke valve (2) are connected as an organic whole structure, first heat exchanger (1) includes first pressure manifold (11), second pressure manifold (12) and connects many heat exchange tubes (13) of arranging side by side between first pressure manifold (11), second pressure manifold (12), heat exchange tube (13) intercommunication first pressure manifold (11) with second pressure manifold (12), first pressure manifold (11) and second pressure manifold (12) all have at least one cavity, and the pipe wall of one of them cavity is equipped with first interface (15), and the pipe wall of another cavity is equipped with second interface (16), and the cavity that the pipe wall was equipped with first interface (15) and the cavity that the pipe wall was equipped with second interface (16) pass through heat exchange tube (13) inner chamber intercommunication, switching-over choke valve (2) have first port (211), A second port (212) and a third port (213), wherein the first port (211) is used for interfacing with the second interface (16), and the second port (212) and the third port (213) are respectively used for interfacing with an external element;

in a first working state, a third port (213) of the reversing throttle valve (2) is closed, a first valve body channel formed by the largest valve port opening degree is arranged between a first port (211) and a second port (212) of the reversing throttle valve (2), and the first interface (15), the heat exchange tube (13), the second interface (16), the first port (211), the first valve body channel and the second port (212) are communicated;

in a second working state, the third port (213) of the reversing throttle valve (2) is closed, a second valve body passage is arranged between the second port (212) and the first port (211) of the reversing throttle valve (2), the flow volume of the second valve body passage is smaller than that of the first valve body passage, and the second port (212), the second valve body passage, the first port (211), the second interface (16), the heat exchange pipe (13) and the first interface (15) are communicated;

in a third operating state, the first port (211) of the directional throttle valve (2) is closed, a third valve body passage is arranged between the second port (212) and the third port (213) of the directional throttle valve (2), the flow volume of the third valve body passage is smaller than that of the first valve body passage, and the second port (212), the third valve body passage and the third port (213) are communicated.

2. The heat exchanger assembly (100) of claim 1, wherein: the reversing throttle valve (2) is a three-way ball valve, the three-way ball valve comprises a valve seat (21), a ball body (22) positioned in the valve seat (21) and a valve rod (23) connected with the ball body (22), the first port, the second port and the third port (211, 212 and 213) are arranged on the valve seat (21), the ball body (22) is provided with an inlet (221) and an outlet (222), and the valve rod (23) drives the ball body (22) to rotate in the valve seat (21) to change the contact ratio of the inlet and the outlet (221 and 222) to the first port, the second port and the third port (211, 212 and 213), so that the three-way ball valve is switched among the first working state, the second working state and the third working state.

3. The heat exchanger assembly (100) of claim 2, wherein: when the valve is in the first working state, an initial 0-degree angle is formed between the valve seat (21) and the ball body (22), wherein the inlet (221) is completely coincided with the first port (211) and the outlet (222) is completely coincided with the second port (212), when the valve rod (23) drives the ball body (22) to deflect at a first angle in the valve seat (21), the reversing throttle valve (2) is switched to the second working state, the inlet (221) is partially coincided with the first port (211) and the outlet (222) is partially coincided with the second port (212); when the valve rod (23) drives the ball body (22) to continuously deflect to a second angle in the valve seat (21), the reversing throttle valve (2) is switched to a third working state, the inlet (221) is partially overlapped with the second port (212), and the outlet (222) is partially overlapped with the third port (213).

4. The heat exchanger assembly (100) of claim 3, wherein: the first angle is between 1 and 44 degrees, and the second angle is between 91 and 144 degrees.

5. The heat exchanger assembly (100) according to any one of claims 1 to 4, wherein: the reversing throttle valve (2) is connected with the first collecting pipe (11) into a whole in a welding mode, the first port (211) and the second connector (16) are aligned, and the side face, welded with the first collecting pipe (11), of the reversing throttle valve (2) is an arc-shaped face (20) matched with the pipe wall of the first collecting pipe (11).

6. The heat exchanger assembly (100) according to any one of claims 1 to 4, wherein: the first heat exchanger (1) further comprises a pressing plate (5), the pressing plate (5) is located between the first collecting pipe (11) and the reversing throttle valve (2), the pressing plate (5) is provided with a communication channel (50) for communicating the first port (211) with the second interface (16), and the reversing throttle valve (2) is installed on the first collecting pipe (11) through the pressing plate (5).

7. The heat exchanger assembly (100) of claim 1, wherein: fins are arranged between every two adjacent heat exchange tubes (13).

8. The heat exchanger assembly (100) of claim 1, wherein: in two pipe cavities of the first collecting pipe (11) and the second collecting pipe (12), a partition plate (14) is arranged in at least one pipe cavity, the pipe cavities of the collecting pipes are divided into a plurality of mutually isolated chambers by the partition plate (14), and the first connector (15) and the second connector (16) are positioned on the pipe walls of two different chambers.

9. The heat exchanger assembly (100) of claim 8, wherein: the pipe cavity of the first collecting pipe (11) is internally provided with a partition plate (14), so that the first collecting pipe (11) is a double-cavity chamber, one side of the partition plate (14) is a first cavity chamber, the other side of the partition plate (14) is a second cavity chamber, the pipe cavity of the second collecting pipe (12) is provided with one cavity chamber, a first connector (15) and a second connector (16) are both positioned on the first collecting pipe (11), the first connector (15) is positioned on the pipe wall of the first cavity chamber, and the second connector (16) is positioned on the pipe wall of the second cavity chamber.

10. A thermal management system, characterized by: the thermal management system comprising a heat exchanger assembly (100) according to any one of claims 1 to 9, a second heat exchanger (4), a compressor (6), an indoor condenser (7), an indoor evaporator (8), a first throttling element (9) and a system pipe (3) connected between the above-mentioned at least two components; the heat management system comprises a first heat exchange mode, a second heat exchange mode and a frosting treatment mode;

in the first heat exchange mode, the heat exchanger assembly (100) operates in a first working state, the first interface (15) serves as a refrigerant inlet, the second interface (212) serves as a refrigerant outlet, the compressor (6), the heat exchanger assembly (100), the first throttling element (9) and the indoor evaporator (8) are communicated to form a loop, and the heat exchanger assembly (100) serves as a condenser in the heat management system;

in the second heat exchange mode, the heat exchanger assembly (100) operates in a second working state, the second port (212) serves as a refrigerant inlet, the first interface (15) serves as a refrigerant outlet, the compressor (6), the indoor condenser (7) and the heat exchanger assembly (100) are communicated to form a loop, and the heat exchanger assembly (100) serves as a second throttling element and an evaporator in the heat management system;

in the frosting treatment mode, the heat exchanger assembly (100) operates in a third working state, the second port (212) serves as a refrigerant inlet, the third port (213) serves as a refrigerant outlet, the compressor (6), the indoor condenser (7), the heat exchanger assembly (100) and the second heat exchanger (4) are communicated to form a loop, and the heat exchanger assembly (100) serves as a third throttling element in the thermal management system.