Variable flow off-board heat exchanger device

Abstract

The present invention provides a variable flow vehicle heat exchanger device, including a heat exchanger assembly, a pipeline assembly and a separate thermostat, wherein the heat exchanger assembly includes a first header, and the pipeline assembly includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the second pipeline is connected to one end of the first header, and one end of the first pipeline is connected to the second pipeline; the fourth pipeline is connected to the other end of the first header, and the other end of the first pipeline is connected to the fourth pipeline; one end of the third pipeline is connected to the first header, and the other end of the third pipeline is connected to the separate thermostat, and the separate thermostat is installed on the first pipeline. The present invention realizes adaptive adjustment of the refrigerant flow direction through a thermostat, greatly improves the heat exchange effect and the practicality of the device, has a simple structure, and is easy to install and disassemble.

Description

Technical Field

[0001] The present invention relates to the field of thermal management of new energy vehicles, and in particular to an off-vehicle heat exchanger device with a variable flow rate. Background Art

[0002] With the development of automobile technology, electric vehicles account for an increasingly higher proportion of vehicles, and electric vehicle heat pump air-conditioning technology has been increasingly studied and applied. Many electric vehicles at home and abroad have been equipped with heat pump air-conditioning systems. The outdoor heat exchanger serves not only as a condenser but also as an evaporator in the heat pump air-conditioning system, and is an important component in the heat pump air-conditioning system.

[0003] At present, most electric vehicle heat pump air conditioning systems use an off-board heat exchanger as a condenser and an evaporator with the same process distribution, which greatly reduces the heat exchange efficiency and makes the heat pump air conditioning system less effective. For example, the electric vehicle heat pump air conditioning system mentioned in patent document CN108036550A uses a parallel flow condenser, which requires four interfaces to realize the functions of the condenser and the evaporator and has the same process distribution, which increases the production cost of the off-board heat exchanger and the pipeline connection of the heat pump air conditioning system will also be complicated.

[0004] For another example, patent document CN110793354A discloses a variable flow heat exchanger device suitable for electric vehicles, but the design adopts bellows and adjusts the flow by pressure. However, the bellows need to be designed separately and are difficult to install. Another example is patent document CN108826753A discloses a variable flow parallel flow heat exchanger, but the design achieves flow changes by manually adjusting a movable mechanism, which is inefficient.

[0005] Therefore, it is necessary to develop an off-vehicle heat exchanger that can realize variable flow distribution as a condenser and an evaporator, which can not only improve the heat exchange efficiency of the off-vehicle heat exchanger, but also simplify the pipeline connection of the heat pump air-conditioning system, which not only saves costs but also improves the heat exchange capacity of the heat pump air-conditioning system. Summary of the invention

[0006] In view of the defects in the prior art, an object of the present invention is to provide an off-vehicle heat exchanger device with a variable flow.

[0007] According to the present invention, a variable flow vehicle heat exchanger device includes a heat exchanger assembly, a pipeline assembly and a separate thermostat;

[0008] The heat exchanger assembly includes a first header, and the pipeline assembly includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline;

[0009] One end of the second pipeline is an inlet end, the other end of the second pipeline is connected to one end of the first header, and one end of the first pipeline is connected to the second pipeline;

[0010] One end of the fourth pipeline is an outlet end, the other end of the fourth pipeline is connected to the other end of the first header, and the other end of the first pipeline is connected to the fourth pipeline;

[0011] One end of the third pipeline is connected to the first header, and the other end of the third pipeline is connected to the separation thermostat, and the separation thermostat is installed on the first pipeline.

[0012] Preferably, the separate thermostat can be switched between a condenser mode and an evaporator mode, and in the condenser mode, the second pipe is connected to the third pipe through the first pipe;

[0013] In the evaporator mode, the fourth conduit is in communication with the third conduit through the first conduit.

[0014] Preferably, the heat exchanger assembly further comprises a flat tube assembly and a second header;

[0015] The first header and the second header are respectively arranged on both sides of the flat tube assembly and are connected through the flat tube assembly.

[0016] Preferably, the first header is provided with a first side plate and a second side plate;

[0017] The first side plate and the second side plate are sequentially installed in the first header and divide the first header into a first accommodation space, a second accommodation space, and a third accommodation space;

[0018] The second pipe is connected to the first accommodation space, the third pipe is connected to the second accommodation space, and the fourth pipe is connected to the third accommodation space.

[0019] Preferably, the flat tube assembly comprises a flat tube and a fin;

[0020] There are multiple flat tubes, which are arranged in parallel, and the fins are arranged between two adjacent flat tubes.

[0021] Preferably, the inlet end of the second pipeline is provided with an inlet component, and the outlet end of the fourth pipeline is provided with an outlet component.

[0022] Preferably, a first interface assembly is provided at one end of the second pipeline connected to the first header;

[0023] A second interface assembly is provided at one end of the third pipeline connected to the first manifold;

[0024] The end of the fourth pipeline connected to the first manifold is provided with a third interface assembly.

[0025] Preferably, it comprises a thermostat housing and a push rod assembly;

[0026] A fourth accommodating space is provided inside the thermostat housing, and a first flow channel, a second flow channel, and a third flow channel connected to the outside are provided inside the thermostat housing, and the first flow channel, the second flow channel, and the third flow channel are respectively connected to the fourth accommodating space, wherein the first flow channel is connected to the second pipeline through the first pipeline, the second flow channel is connected to the third pipeline, and the third flow channel is connected to the fourth pipeline through the first pipeline;

[0027] The push rod assembly is installed in the fourth accommodating space, and the push rod assembly includes a spring, a guide column, a push rod and an elastic capsule;

[0028] The push rod comprises a push rod protrusion, the push rod protrusion comprises a protrusion bottom, and the spring is sleeved on the push rod and arranged between the protrusion bottom and the inner wall of the thermostat housing;

[0029] A fourth accommodating space is provided inside the push rod, a push rod through hole is provided on the push rod and the fourth accommodating space is connected with the outside through the push rod through hole, a slot is fixed inside the thermostat housing and the slot is arranged in the first flow channel, one end of the guide column is installed in the slot, and the other end of the guide column extends through the push rod through hole to the fourth accommodating space and contacts with the elastic sac arranged in the fourth accommodating space.

[0030] Preferably, a sealing block is provided inside the thermostat housing, and in the condenser mode, the push rod moves close to the third flow channel, and one end of the push rod close to the third flow channel can be sealed and fitted with the sealing block;

[0031] The push rod protrusion includes a protrusion top, and one end of the fourth accommodating space close to the first flow channel is a conical structure. In the evaporator mode, the push rod moves close to the first flow channel, and the protrusion top can be sealed and fitted with the inner wall of the thermostat housing.

[0032] Preferably, the first pipeline is a split component, the side of the thermostat housing close to the first flow channel is detachably connected to the first pipeline, the side of the thermostat housing close to the third flow channel is detachably connected to the first pipeline, and the side of the thermostat housing close to the second flow channel is detachably connected to the third pipeline.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention realizes the regulation of the refrigerant flow direction by adopting a thermostat, reduces the volume of the device, greatly improves the heat exchange effect of the heat exchanger as a condenser and an evaporator, and improves the practicability of the device.

[0035] 2. The heat exchanger in the present invention has one inlet and one outlet. No matter it is used as a condenser or an evaporator, the inlet is always the inlet and the outlet is always the outlet, which reduces the number of interfaces, simplifies the complexity of the connection of the pipeline, reduces the manufacturing cost, has a simple structure and is easy to operate.

[0036] 3. The present invention realizes the process flow changing function through the internal structure setting of the thermostat, which solves the problem of the process flow changing operation through electric or pneumatic control in the prior art, saves energy, and is scientific and reasonable.

[0037] 4. The thermostat in the present invention can be integrated into an external pipeline, and the external pipeline can be connected to the interface of the heat exchanger assembly through various detachable structures such as threads, so as to facilitate the maintenance or replacement of the thermostat. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0039] Figure 1 It is a structural schematic diagram of the present invention;

[0040] Figure 2 It is a schematic diagram of the refrigerant flow route when used as a condenser in the present invention;

[0041] Figure 3 It is a schematic diagram of the refrigerant flow route when used as an evaporator in the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of the separate thermostat in condenser mode.

[0043] The figure shows:

[0044] DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0046] The present invention provides a variable flow vehicle heat exchanger device, such as Figure 1-4As shown, it includes a heat exchanger assembly 1, a pipeline assembly 2 and a separate thermostat 3, the heat exchanger assembly 1 includes a first header 6, the pipeline assembly 2 includes a first pipe 15, a second pipe 16, a third pipe 17 and a fourth pipe 18, one end of the second pipe 16 is an inlet end, the other end of the second pipe 16 is connected to one end of the first header 6, one end of the first pipe 15 is connected to the second pipe 16, one end of the fourth pipe 18 is an outlet end, the other end of the fourth pipe 18 is connected to the other end of the first header 6, the other end of the first pipe 15 is connected to the fourth pipe 18, one end of the third pipe 17 is connected to the first header 6, the other end of the third pipe 17 is connected to the separate thermostat 3 and the separate thermostat 3 is installed on the first pipe 15.

[0047] Specifically, the first pipe 15 is a split part, the side of the thermostat housing 19 close to the first flow channel 25 is detachably connected to the first pipe 15, the side of the thermostat housing 19 close to the third flow channel 27 is detachably connected to the first pipe 15, and the side of the thermostat housing 19 close to the second flow channel 26 is detachably connected to the third pipe 17. In the present invention, the thermostat housing 19 and each pipe are detachably connected, preferably threadedly connected. The detachable connection method is convenient for replacing or repairing the separate thermostat 3.

[0048] Specifically, Figure 1 As shown, the heat exchanger assembly 1 also includes a flat tube assembly and a second header 7. A first side plate 11 and a second side plate 12 are provided in the first header 6. The first header 6 and the second header 7 are respectively arranged on both sides of the flat tube assembly and are connected through the flat tube assembly. The first side plate 11 and the second side plate 12 are sequentially installed in the first header 6 and divide the first header 6 into a first accommodating space 22, a second accommodating space 23, and a third accommodating space 24. The second pipe 16 is connected to the first accommodating space 22, the third pipe 17 is connected to the second accommodating space 23, and the fourth pipe 18 is connected to the third accommodating space 24.

[0049] Specifically, in a preferred example, the flat tube assembly includes a flat tube 13 and a fin 14. The number of the flat tubes 13 is multiple, and the multiple flat tubes 13 are arranged in parallel. The fin 14 is arranged between two adjacent flat tubes 13. The fin 14 increases the heat exchange area and can improve the heat exchange effect of the heat exchanger.

[0050] Specifically, the inlet end of the second pipe 16 is provided with an inlet component 4, the outlet end of the fourth pipe 18 is provided with an outlet component 5, the end of the second pipe 16 connected to the first collecting pipe 6 is provided with a first interface component 8, the end of the third pipe 17 connected to the first collecting pipe 6 is provided with a second interface component 9, and the end of the fourth pipe 18 connected to the first collecting pipe 6 is provided with a third interface component 10. In the present invention, each component can reasonably select a specific structure according to the actual application scenario. For example, the inlet component 4 adopts a joint with external threads at both ends to match and connect with the external pipeline and the second pipe 16. For another example, the outlet component 5 adopts an external threaded joint connected to a valve, etc. According to the actual application scenario, in order to facilitate installation, the structure of the component can be flexibly selected to achieve the effect of matching installation and sealing installation.

[0051] Specifically, Figure 1 As shown, the separate thermostat 3 can be switched between the condenser mode and the evaporator mode. In the condenser mode, Figure 2 As shown, the second pipe 16 is connected to the third pipe 17 through the first pipe 15. In the evaporator mode, Figure 3 As shown, the fourth pipeline 18 is connected to the third pipeline 17 through the first pipeline 15.

[0052] Furthermore, if Figure 4 As shown, the split thermostat 3 comprises a thermostat housing (19) and a push rod assembly. The thermostat housing 19 preferably adopts a split structure so that the push rod assembly can be easily repaired and assembled.

[0053] Furthermore, a fourth accommodating space (21) is provided inside the thermostat housing (19), and a first flow channel (25), a second flow channel (26), and a third flow channel (27) which are connected to the outside are provided inside the thermostat housing (19), and the first flow channel (25), the second flow channel (26), and the third flow channel (27) are respectively connected to the fourth accommodating space (21), wherein the first flow channel 25 is connected to the second flow channel 16 via the first pipe 15, the second flow channel 26 is connected to the second accommodating space 23 via the third pipe 17, and the third flow channel 27 is connected to the fourth pipe 18 via the first pipe 15.

[0054] Specifically, the push rod assembly is installed in the fourth accommodating space (21), the push rod assembly comprises a spring (28), a guide column (33), a push rod (32) and an elastic bag body, the push rod (32) comprises a push rod protrusion (31), the push rod protrusion (31) comprises a protrusion bottom, the spring (28) is sleeved on the push rod (32) and is arranged between the protrusion bottom and the inner wall of the thermostat housing (19), the fourth accommodating space is arranged inside the push rod (32), the push rod (32) is provided with a push rod through hole, and the fourth accommodating space is provided through the push rod The through hole is in communication with the outside, a slot (34) is fixed inside the thermostat housing (19), and the slot (34) is arranged in the first flow channel (25), one end of the guide column (33) is installed in the slot (34), and the other end of the guide column (33) extends through the top rod through hole into the fourth accommodation space and contacts the elastic sac arranged in the fourth accommodation space, and the elastic sac is filled with paraffin. In the condenser mode, the temperature of the refrigerant is relatively high, for example, the temperature of the refrigerant is greater than 25°C, at which time the paraffin in the elastic sac melts, causing the volume of the elastic sac to increase. Figure 2 In the figure, the refrigerant flow path of the heat exchanger device in the condenser mode is realized, and the refrigerant flow path distribution method is implemented when the inlet is gas and the required volume is large when it acts as a condenser, and the outlet is liquid and the required volume is small.

[0055] Furthermore, in the evaporator mode, if Figure 3 As shown, when used as an evaporator, the temperature of the refrigerant is relatively low, for example, the temperature is lower than 15°C, the inlet is mainly liquid, requiring a small volume, and the outlet is mainly gas, requiring a large volume. The heat exchange effect of the heat exchanger as a condenser and an evaporator is greatly improved by adjusting the refrigerant flow route of the variable process.

[0056] The variable process parallel flow heat exchanger of the present invention is intended to be suitable for changing working conditions when the air conditioner is working, so that the efficiency of the heat exchanger can be optimized under the changing working conditions. The variable process is used to optimize the distribution of the refrigerant and reduce the flow path of the refrigerant with low heat exchange efficiency in the flat tubes, thereby utilizing the entire area of ​​the heat exchanger with the highest efficiency, thereby achieving the purpose of improving the performance of the heat exchanger.

[0057] The working principle of the heat exchanger device in the present invention is as follows:

[0058] Figure 1 This is a schematic diagram of the structure of the variable flow off-board heat exchanger of the present invention. Figure 2This is a schematic diagram of the structure of the implementation scheme of the heat exchanger as a condenser. A portion of the high-temperature and high-pressure refrigerant gas (e.g., greater than 25°C) enters the first accommodation space 22 through the second pipe 16 via the first interface component 8, and another portion of the refrigerant gas flows through the separate thermostat 3 via the first pipe 15. The high-temperature refrigerant gas melts the material (e.g., paraffin) inside the separate thermostat 3, thereby compressing the spring 28 of the separate thermostat 3. The upper flow channel of the separate thermostat 3 is opened, that is, the second pipe 16 and the third pipe 17 are connected, allowing the refrigerant gas to flow through the separate thermostat 3 to the second interface component 9 and into the second accommodation space 23. The lower mechanism of the separate thermostat 3 is sealed, that is, the fourth pipe 18 is not connected to the third pipe 17. In this way, the number of the first process flat tubes 13 through which the refrigerant gas flows is relatively large (the first process is Figure 1 The flat tubes 13 above the second side plate 12 in the middle), the refrigerant from the first process releases heat and passes through the second header 7 before entering the flat tubes 13 of the second process ( Figure 1 The refrigerant flows through the flat tube 13 below the second side plate 12 in the middle), into the third accommodation space 24, and finally flows out of the outlet assembly 5 through the third interface assembly 10 to complete the flow of the refrigerant. Even if the opening and closing of the thermostat is delayed, the heat exchanger is always in circulation, and there is no problem of the heat exchanger not working.

[0059] Figure 3 This is an implementation scheme of the heat exchanger as an evaporator. Low-temperature refrigerant gas (e.g., less than 15°C) enters the first manifold 6 from the inlet assembly 4 through the first interface assembly 8. The low-temperature refrigerant gas solidifies the material (e.g., paraffin material) inside the separate thermostat 3, causing the spring 28 to elastically stretch. The upper flow channel of the separate thermostat 3 is closed, and the refrigerant gas is not allowed to flow through the separate thermostat 3, that is, the second pipe 16 and the third pipe 17 are not connected. The lower mechanism of the separate thermostat 3 is separated from the internal structure of the external pipeline assembly 2 to open the channel, that is, the fourth pipe 18 is connected to the third pipe 17, allowing the refrigerant to flow to the external pipeline fourth pipe 18. In this way, the number of the first process flat tubes 13 through which the refrigerant flows is relatively small ( Figure 1 The flat tubes 13 above the first side plate 11 in the middle), the refrigerant coming out of the first flow path absorbs heat and passes through the second header 7 before entering the flat tubes 13 of the second flow path ( Figure 1 The flat tube 13 below the first side plate 11 in the middle), part of the refrigerant flowing out of the second process flat tube 13 passes through the separate thermostat 3 to the outlet component 5, and the other part passes through the third interface component 10 to the outlet component 5, completing the flow of the refrigerant.

[0060] The working principle of the separate thermostat in the present invention is as follows:

[0061] Specifically, Figure 4As shown, the push rod assembly can switch between the condenser mode and the evaporator mode, and in different operating modes, the present invention can adaptively adjust the flow channel according to the temperature of the refrigerant. When the push rod assembly operates in the condenser mode, the temperature of the refrigerant is relatively high, for example, greater than 25°C. The elastic sac is preferably filled with paraffin. When the refrigerant with a relatively high temperature passes through the fourth accommodating space 21, the heat is transferred to the elastic sac through the push rod 32, the paraffin melts and the volume of the elastic sac increases, and the elastic sac squeezes the guide column 33. After being squeezed, the guide column 33 transmits the squeezing force to the card slot 34. Since the card slot 34 is fixed, the reaction force of the card slot 34 drives the lower push rod 32 to move away from the first flow channel 25 and closer to the third flow channel 27. At this time, the spring 28 is compressed and shortened, the first flow channel 25 is connected with the second flow channel 26, and the second flow channel 26 is not connected with the third flow channel 27. The refrigerant flows from the first flow channel 25 into the fourth accommodating space 21 and then flows out from the second flow channel 26.

[0062] When the push rod assembly operates in the evaporator mode, the temperature of the refrigerant is relatively low, for example, less than 15°C. When the refrigerant with a relatively low temperature passes through the fourth accommodation space 21, the temperature is transmitted to the elastic capsule through the push rod 32, and the paraffin solidifies, thereby reducing the volume of the elastic capsule. At this time, a gap is generated between the elastic capsule and the guide column 33 in the fourth accommodation space. At this time, the compressed spring 28 can drive the push rod 32 to move close to the first flow channel 25 under the action of the rebound force. At this time, the first flow channel 25 is not connected to the second flow channel 26, and the second flow channel 26 is connected to the third flow channel 27. The present invention utilizes the different refrigerant temperatures. When used as a condenser, the inlet refrigerant is a high-temperature gas, and when used as an evaporator, the inlet refrigerant is a low-temperature gas-liquid two-phase, so as to adjust the flow direction of the thermostat, thereby changing the flow direction of the refrigerant and realizing the transformation of the flow channel of the heat exchanger.

[0063] It should be noted that paraffin is provided in the elastic sac, which undergoes a solid-liquid phase transition due to the influence of the external fluid temperature. The elastic sac will also expand or shrink in volume due to the volume change of the paraffin, thereby being able to adjust the length of the guide column 33 in the fourth accommodating space, thereby achieving the purpose of adjusting the push rod 32.

[0064] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A variable flow off-vehicle heat exchanger device, characterized in that: It comprises a heat exchanger assembly (1), a pipeline assembly (2) and a separate thermostat (3); The heat exchanger assembly (1) comprises a first header (6), and the pipeline assembly (2) comprises a first pipeline (15), a second pipeline (16), a third pipeline (17) and a fourth pipeline (18); One end of the second pipeline (16) is an inlet end, the other end of the second pipeline (16) is connected to one end of the first header (6), and one end of the first pipeline (15) is connected to the second pipeline (16); One end of the fourth pipeline (18) is an outlet end, the other end of the fourth pipeline (18) is connected to the other end of the first header (6), and the other end of the first pipeline (15) is connected to the fourth pipeline (18); One end of the third pipe (17) is connected to the first manifold (6), and the other end of the third pipe (17) is connected to the separate thermostat (3), and the separate thermostat (3) is mounted on the first pipe (15).

2. The variable flow off-vehicle heat exchanger device according to claim 1, characterized in that: The separate thermostat (3) is capable of switching between a condenser mode and an evaporator mode. In the condenser mode, the second pipe (16) is connected to the third pipe (17) via the first pipe (15); In the evaporator mode, the fourth pipe (18) is connected to the third pipe (17) through the first pipe (15).

3. The variable flow off-vehicle heat exchanger device according to claim 2, characterized in that: The heat exchanger assembly (1) further comprises a flat tube assembly and a second header (7); The first collecting pipe (6) and the second collecting pipe (7) are respectively arranged on two sides of the flat tube assembly and are connected through the flat tube assembly.

4. The variable flow off-vehicle heat exchanger device according to claim 3, characterized in that: The first collecting pipe (6) is provided with a first side plate (11) and a second side plate (12); The first side plate (11) and the second side plate (12) are sequentially installed in the first header (6) and divide the first header (6) into a first accommodating space (22), a second accommodating space (23), and a third accommodating space (24); The second pipe (16) is connected to the first accommodating space (22), the third pipe (17) is connected to the second accommodating space (23), and the fourth pipe (18) is connected to the third accommodating space (24).

5. The variable flow off-vehicle heat exchanger device according to claim 4, characterized in that: The flat tube assembly comprises a flat tube (13) and a fin (14); There are a plurality of flat tubes (13), the plurality of flat tubes (13) are arranged in parallel, and the fins (14) are arranged between two adjacent flat tubes (13).

6. The variable flow off-vehicle heat exchanger device according to claim 1, characterized in that: The inlet end of the second pipeline (16) is provided with an inlet component (4), and the outlet end of the fourth pipeline (18) is provided with an outlet component (5).

7. The variable flow off-vehicle heat exchanger device according to claim 1, characterized in that: One end of the second pipeline (16) connected to the first manifold (6) is provided with a first interface assembly (8); One end of the third pipeline (17) connected to the first manifold (6) is provided with a second interface assembly (9); A third interface assembly (10) is provided at one end of the fourth pipeline (18) connected to the first header (6).

8. The variable flow off-vehicle heat exchanger device according to claim 4, characterized in that: It includes a thermostat housing (19) and a push rod assembly; A fourth accommodating space (21) is provided inside the thermostat housing (19); a first flow channel (25), a second flow channel (26), and a third flow channel (27) which are connected to the outside are provided inside the thermostat housing (19); the first flow channel (25), the second flow channel (26), and the third flow channel (27) are respectively connected to the fourth accommodating space (21); the first flow channel (25) is connected to the second flow channel (16) via the first pipeline (15); the second flow channel (26) is connected to the third pipeline (17); and the third flow channel (27) is connected to the fourth pipeline (18) via the first pipeline (15); The push rod assembly is installed in the fourth accommodating space (21), and the push rod assembly comprises a spring (28), a guide column (33), a push rod (32), and an elastic capsule; The push rod (32) comprises a push rod protrusion (31), the push rod protrusion (31) comprises a protrusion bottom, and the spring (28) is sleeved on the push rod (32) and arranged between the protrusion bottom and the inner wall of the thermostat housing (19); A fourth accommodating space is provided inside the push rod (32), a push rod through hole is provided on the push rod (32), and the fourth accommodating space is connected to the outside through the push rod through hole; a slot (34) is fixed inside the thermostat housing (19), and the slot (34) is arranged in the first flow channel (25); one end of the guide column (33) is installed in the slot (34), and the other end of the guide column (33) passes through the push rod through hole and extends into the fourth accommodating space and contacts the elastic bag body arranged in the fourth accommodating space.

9. The variable flow off-vehicle heat exchanger device according to claim 8, characterized in that: A sealing block (35) is disposed inside the thermostat housing (19); in the condenser mode, the push rod (32) moves close to the third flow channel (27), and one end of the push rod (32) close to the third flow channel (27) can be sealed and fitted with the sealing block (35); The push rod protrusion (31) includes a protrusion top, and one end of the fourth accommodating space (21) close to the first flow channel (25) is a conical structure. In the evaporator mode, the push rod (32) moves close to the first flow channel (25), and the protrusion top can be sealed and fitted with the inner wall of the thermostat housing (19).

10. The variable flow off-vehicle heat exchanger device according to claim 8, characterized in that: The first pipe (15) is a split component, the side of the thermostat housing (19) close to the first flow channel (25) is detachably connected to the first pipe (15), the side of the thermostat housing (19) close to the third flow channel (27) is detachably connected to the first pipe (15), and the side of the thermostat housing (19) close to the second flow channel (26) is detachably connected to the third pipe (17).

Images