Heat exchanger, heat management system and air conditioning equipment

Abstract

The invention relates to a heat exchanger, a heat management system and air conditioning equipment, the heat exchanger comprises at least one first heat exchange flow channel and a second heat exchange flow channel, the at least one first heat exchange flow channel is used for allowing a heat exchange medium to pass through and can exchange heat with the heat exchange medium, and the second heat exchange flow channel is used for allowing the heat exchange medium to pass through and can exchange heat with the heat exchange medium, when the heat exchanger is used as a condenser, the first heat exchange flow channel and the second heat exchange flow channel are connected in series, and when the heat exchanger is used as an evaporator, the first heat exchange flow channel and the second heat exchange flow channel are connected in parallel. When the heat exchanger is in different working modes, the flowing path of the heat exchange medium is reversely changed, and the flow channels in the heat exchanger are different, so that the heat exchanger has better heating and refrigerating performances. In addition, the second heat exchange flow channel can always participate in heat exchange of the heat exchange medium under the two conditions that the heat exchanger is used as a condenser and an evaporator, the number of flow channels in the heat exchanger can be reduced, the structure is simple, cost is low, and compactness is high.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air-conditioning equipment, and in particular, to a heat exchanger, a thermal management system and air-conditioning equipment. Background Art

[0002] In the related art, the flow channels for heat exchange medium in the heat exchanger used in the thermal management system are usually fixed. When the heat exchanger switches between cooling and heating states, the heat exchange medium in the heat exchanger usually only flows in the reverse direction in the flow channels. That is, when the heat exchanger is used as a condenser and evaporator, the heat exchange flow channels inside the heat exchanger are fixed, resulting in the inability to achieve both good heating and cooling performance. Summary of the invention

[0003] The present disclosure provides a heat exchanger, a thermal management system and an air conditioning device to at least partially overcome the problems existing in the related art.

[0004] In order to achieve the above object, according to a first aspect of the present disclosure, a heat exchanger is provided, comprising: at least one first heat exchange flow channel, for allowing a heat exchange medium to pass through and capable of exchanging heat with the heat exchange medium; and The second heat exchange flow channel is used for allowing the heat exchange medium to pass through and can exchange heat with the heat exchange medium; Wherein, the heat exchanger is configured such that when used as a condenser, the first heat exchange channel and the second heat exchange channel are connected in series; The heat exchanger is configured such that when used as an evaporator, the first heat exchange channel and the second heat exchange channel are connected in parallel.

[0005] Optionally, the second heat exchange channel includes a subcooling channel of the heat exchanger.

[0006] Optionally, the first end of the first heat exchange channel is suitable for connecting to a compressor of a thermal management system, and the second end of the first heat exchange channel is connected to the first end of the second heat exchange channel; The second end of the second heat exchange channel is adapted to be selectively connected to a throttling expansion device of the thermal management system; Furthermore, the second end of the second heat exchange channel is suitable for being selectively connected to the compressor.

[0007] Optionally, the heat exchanger further comprises a first valve, wherein the first valve is located on a connecting flow path between the second end of the second heat exchange flow channel and the throttling expansion device; and / or, The heat exchanger further comprises a second valve, wherein the second valve is located on a connecting flow path between the second end of the second heat exchange flow channel and the compressor; and / or, The heat exchanger further includes a third valve, which is located on a connecting flow path between the first end of the second heat exchange flow channel and the throttling expansion device.

[0008] Optionally, the heat exchanger further comprises a first connecting flow path, one end of which is connected to the second end of the second heat exchange flow channel, the other end of which is suitable for being connected to the throttling expansion device, and the first valve is located on the first connecting flow path; and / or, The heat exchanger also includes a second connecting flow path, one end of which is suitable for connecting to the compressor, the other end of which is connected to the second end of the second heat exchange channel, and the second valve is located on the second connecting flow path.

[0009] Optionally, the heat exchanger further comprises a third connecting flow path; One end of the third connecting flow path is connected to the second end of the first heat exchange flow path and the first end of the second heat exchange flow path, the other end of the third connecting flow path is suitable for connecting to the first connecting flow path, and the third valve is located on the third connecting flow path.

[0010] Optionally, the first valve is a one-way valve, which allows the heat exchange medium to flow from the second end of the second heat exchange channel to the throttling expansion device in one direction; and / or, The second valve is a one-way valve, and the second valve allows the heat exchange medium to flow from the second end of the second heat exchange flow channel to the compressor in one direction; and / or, The third valve is a one-way valve, and the third valve allows the heat exchange medium to flow from the throttling expansion device into the first end of the second heat exchange channel and the second end of the first heat exchange channel in one direction.

[0011] Optionally, at least one of the first end of the first heat exchange channel, the second end of the second heat exchange channel, and one end of the second connecting channel is suitable for being connected to the compressor through the air collecting pipe of the heat exchanger; and / or, The second end of the first heat exchange channel and the first end of the second heat exchange channel are connected via a liquid collecting pipe of the heat exchanger, and the liquid collecting pipe is suitable for being connected to the throttling expansion device via the third connecting flow path.

[0012] Optionally, there are multiple first heat exchange channels, and the multiple first heat exchange channels are arranged in parallel.

[0013] Optionally, the number of the first heat exchange channels is at least three.

[0014] According to a second aspect of the present disclosure, there is provided a thermal management system, comprising a compressor, a reversing valve, a first heat exchanger, a second heat exchanger, and a throttling expansion device connected in series to form a loop; Wherein, the heat exchange medium flowing out through the outlet of the compressor can selectively flow through the first heat exchanger and then through the second heat exchanger through the reversing valve, or selectively flow through the second heat exchanger and then through the first heat exchanger; At least one of the first heat exchanger and the second heat exchanger is a heat exchanger as described above.

[0015] Optionally, the first heat exchanger is the above-mentioned heat exchanger; And the first heat exchanger is an outdoor heat exchanger, and the second heat exchanger is an indoor heat exchanger.

[0016] Optionally, the reversing valve is a four-way valve having a first valve port, a second valve port, a third valve port and a fourth valve port; The first valve port is suitable for being connected to the outlet of the compressor, and the second valve port is suitable for being connected to the inlet of the compressor; The third valve port is suitable for connecting to the first heat exchange channel in the first heat exchanger; The fourth valve port is suitable for being connected to a heat exchange medium opening in the second heat exchanger.

[0017] According to a third aspect of the present disclosure, an air conditioning device is provided, comprising the thermal management system described above.

[0018] Through the above technical scheme, when the heat exchanger provided by the present application is in different working modes, the flow path of the heat exchange medium is not only changed in the reverse direction, but the flow channels in the heat exchanger are also different. In this way, by reasonably controlling the heat exchanger, the heat exchanger can be in different working modes, that is, when used as a condenser or an evaporator, the heat exchanger can have different heat exchange flow channels, that is, when the heat exchanger is used as a condenser, it can have a smaller number of heat exchange flow channels with a larger degree of subcooling, and when the heat exchanger is used as an evaporator, it can have a larger number of heat exchange flow channels, which is beneficial to reducing the flow resistance of the heat exchange medium, so that it can have both good heating and cooling performance.

[0019] In the heat exchanger provided in the present application, when it is used as a condenser, the second heat exchange flow channel can be connected in series with the first heat exchange flow channel, and further heat is exchanged on the basis of the first heat exchange flow channel, so that the heat exchange medium has a higher degree of supercooling. And, when it is used as an evaporator, the second heat exchange flow channel can also be connected in parallel with the first heat exchange flow channel, so that the heat exchange medium can flow through the first heat exchange flow channel and the second heat exchange flow channel synchronously, so that the heat exchange medium flowing through the heat exchanger has a lower flow resistance. In other words, in the present application, the second heat exchange flow channel can always participate in the heat exchange of the heat exchange medium in both cases where the heat exchanger is used as a condenser and an evaporator. Compared with the heat exchange flow channels separately set in the heat exchanger for increasing the degree of supercooling and reducing the flow resistance, the second heat exchange flow channel in the heat exchanger provided in the present application plays different roles in the above two cases, while reducing the number of flow channels in the heat exchanger. The structure of the heat exchanger is relatively simple, the cost is low, and the compactness is high, which is conducive to improving the production and manufacturing efficiency of the heat exchanger.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0022] Figure 1 is a partial schematic diagram of a thermal management system provided by an exemplary embodiment of the present disclosure, wherein a heat exchanger is schematically shown by a dotted-line frame, and a second pipeline and a third pipeline are shown.

[0023] Figure 2 is a schematic diagram of a thermal management system provided by an exemplary embodiment of the present disclosure.

[0024] Figure 3 is a flow diagram of a thermal management system in a cooling mode provided by an exemplary embodiment of the present disclosure, wherein the dotted line with an arrow indicates the flow path and flow direction of the heat exchange medium in this mode.

[0025] Figure 4 is a flow diagram of a thermal management system in a heating mode provided by an exemplary embodiment of the present disclosure, wherein the dotted line with an arrow represents the flow path and flow direction of the heat exchange medium in this mode.

[0026] Description of Reference Numerals 100-thermal management system; 1-heat exchanger; 101-first heat exchange flow channel; 102-second heat exchange flow channel; 103-first connecting flow path; 104-second connecting flow path; 105-third connecting flow path; 106-gas collecting pipe; 107-liquid collecting pipe; 2-throttling expansion device; 3-compressor; 4-first valve; 5-second valve; 6-third valve; 7-reversing valve; 71-first valve port; 72-second valve port; 73-third valve port; 74-fourth valve port; 8-first heat exchanger; 9-second heat exchanger; 10-gas-liquid separator; 11-first angle valve; 12-second angle valve; 13-first pipeline; 14-second pipeline; 15-third pipeline; 16-fourth pipeline; 17-fifth pipeline; 18-sixth pipeline. DETAILED DESCRIPTION

[0027] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0028] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment". The relevant definitions of other terms will be given in the following description.

[0029] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0030] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0031] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0032] As mentioned above, in a thermal management system (such as an air conditioner's thermal management system), when the thermal management system is in cooling mode, that is, when the heat exchanger is used as a condenser, in order to make the heat exchange medium flowing out of the heat exchanger have a higher degree of supercooling, so that the thermal management system has a better cooling effect, the flow channel in the heat exchanger usually adopts a design method of fewer flow channels and larger degree of supercooling, and when the thermal management system is in heating mode, that is, when the heat exchanger is used as an evaporator, in order to increase the heating amount, the flow channel in the heat exchanger usually adopts a design method of multiple flow channels and low flow resistance. That is to say, for different modes of the thermal management system, there are contradictions in the design ideas of the flow channels in the heat exchanger. Therefore, in the related technology, the radiator with fixed flow channels cannot take into account both good heating and cooling performance.

[0033] In view of this, if Figures 1 to 4 As shown, the first aspect of the present disclosure provides a heat exchanger 1, comprising at least one first heat exchange channel 101 and a second heat exchange channel 102, wherein the at least one first heat exchange channel 101 is used for allowing a heat exchange medium to pass through and to exchange heat with the heat exchange medium, and the second heat exchange channel 102 is used for allowing a heat exchange medium to pass through and to exchange heat with the heat exchange medium, wherein the heat exchanger 1 is configured to, when used as a condenser, have the first heat exchange channel 101 and the second heat exchange channel 102 connected in series, so that the heat exchange medium entering the heat exchanger 1 can flow through the first heat exchange channel 101 and the second heat exchange channel 102 in sequence, and the heat exchanger 1 is configured to, when used as an evaporator, have the first heat exchange channel 101 and the second heat exchange channel 102 connected in parallel, so that the heat exchange medium entering the heat exchanger 1 can flow through the first heat exchange channel 101 and the second heat exchange channel 102 synchronously.

[0034] In the above-mentioned heat exchanger 1, since the first heat exchange channel 101 and the second heat exchange channel 102 can both allow the heat exchange medium to pass through and can exchange heat with the heat exchange medium, such as cooling or heating, therefore, through the heat exchanger 1, the cooling or heating of the heat exchange medium can be achieved under the premise of realizing the circulation flow of the heat exchange medium, thereby realizing the cooling or heating of the thermal management system 100 using the heat exchanger 1.

[0035] When the heat exchanger 1 is used as a condenser, the first heat exchange channel 101 and the second heat exchange channel 102 are connected in series (i.e., the channels in the heat exchanger 1 are in a series mode). Thus, when the heat exchanger 1 is applied to the thermal management system 100, for example, when the thermal management system 100 is in a cooling mode, see Figure 1 and Figure 3The high-temperature and high-pressure gas flowing out of the compressor 3 in the thermal management system 100 can pass through the first heat exchange channel 101 and the second heat exchange channel 102 in sequence, and can exchange heat in the first heat exchange channel 101 and the second heat exchange channel 102. The heat exchange medium through the two heat exchanges can have a higher degree of subcooling (that is, the heat exchange medium can have a lower temperature). The heat exchange medium with a higher degree of subcooling has a higher refrigeration performance coefficient, so that the thermal management system 100 using the heat exchanger 1 can have better refrigeration performance.

[0036] Furthermore, when the above-mentioned heat exchanger 1 is used as an evaporator, the first heat exchange channel 101 and the second heat exchange channel 102 are connected in parallel (that is, the channels in the heat exchanger 1 are in a parallel mode). In this way, when the above-mentioned heat exchanger 1 is applied to the thermal management system 100, for example, the thermal management system 100 is in a heating mode, the heat exchange medium can flow through the first heat exchange channel 101 and the second heat exchange channel 102 at the same time, and flow to other structures in the thermal management system 100 (such as the compressor 3, etc.). The first heat exchange channel 101 and the second heat exchange channel 102 connected in parallel with each other can have a larger flow area as a whole. The flow resistance of the heat exchange medium in the first heat exchange channel 101 and the second heat exchange channel 102 with a larger flow area is small, the flow speed is fast, and the temperature reduction after passing through the heat exchanger 1 is small, thereby being able to increase the suction pressure of the compressor 3 of the thermal management system 100, and further enabling the thermal management system 100 using the heat exchanger 1 to have better heating performance.

[0037] To summarize, through the above technical scheme, when the heat exchanger 1 provided by the present application is in different working modes, the flow path of the heat exchange medium is not only changed in the reverse direction, but the flow channels in the heat exchanger 1 are also different. In this way, by reasonably controlling the heat exchanger 1, the heat exchanger 1 is in different working modes, that is, when used as a condenser or an evaporator, the heat exchanger 1 can have different heat exchange flow channels, that is, when the heat exchanger 1 is used as a condenser, it can have a smaller number of heat exchange flow channels with a larger degree of subcooling, and when the heat exchanger is used as an evaporator, it can have a larger number of heat exchange flow channels, which is beneficial to reducing the flow resistance of the heat exchange medium, thereby being able to have both good heating and cooling performance.

[0038] In the heat exchanger 1 provided in the present application, when it is used as a condenser, the second heat exchange channel 102 can be connected in series with the first heat exchange channel 101 to further exchange heat (cool) on the basis of the first heat exchange channel 101, so that the heat exchange medium has a higher degree of subcooling. Moreover, when it is used as an evaporator, the second heat exchange channel 102 can also be connected in parallel with the first heat exchange channel 101, so that the heat exchange medium can flow through the first heat exchange channel 101 and the second heat exchange channel 102 synchronously, so that the heat exchange medium flowing through the heat exchanger 1 has a lower flow resistance. In other words, in the present application, the second heat exchange channel 102 can always participate in the heat exchange of the heat exchange medium in both cases where the heat exchanger 1 is used as a condenser and an evaporator. Compared with separately setting heat exchange channels in the heat exchanger 1 for increasing the degree of subcooling and reducing the flow resistance, the second heat exchange channel 102 in the heat exchanger 1 provided in the present application plays different roles in the above two cases while reducing the number of channels in the heat exchanger 1. The heat exchanger 1 has a simpler structure, lower cost, and higher compactness, which is conducive to improving the production and manufacturing efficiency of the heat exchanger 1.

[0039] The present disclosure does not limit the specific type of the heat exchanger 1, as long as the heat exchanger 1 can meet the use requirements of the thermal management system 100. For example, the heat exchanger 1 can be an indoor heat exchanger 1, and the heat exchanger 1 can also be an outdoor heat exchanger 1.

[0040] Among them, the above-mentioned second heat exchange channel 102 can be a subcooling channel of the heat exchanger 1, for example, it can be a subcooling channel provided by the heat exchanger 1, or it can be a heat exchange channel separately set for the heat exchanger 1, and the present disclosure does not limit this.

[0041] In order to enable the heat exchanger 1 to which the thermal management system 100 is applied to have different working modes, optionally, as Figures 1 to 4 As shown, the first end 1011 of the first heat exchange channel 101 is suitable for being connected to the compressor 3 of the thermal management system 100, the second end 1012 of the first heat exchange channel 101 is connected to the first end 1021 of the second heat exchange channel 102, the second end 1022 of the second heat exchange channel 102 can be selectively connected to the throttling expansion device 2 of the thermal management system 100, and the second end 1022 of the second heat exchange channel 102 can be selectively connected to the compressor 3.

[0042] In this way, when the thermal management system 100 needs cooling, by connecting the first end 1011 of the first heat exchange channel 101 to the compressor 3, connecting the second end 1012 of the first heat exchange channel 101 to the first end 1021 of the second heat exchange channel 102, connecting the second end 1022 of the second heat exchange channel 102 to the throttling expansion device 2, and selectively disconnecting the second end 1022 of the second heat exchange channel 102 from the compressor 3, at this time, the high-temperature and high-pressure gas flowing out of the compressor 3 can be liquefied and release heat under the cooling action of the first heat exchange channel 101 and the second heat exchange channel 102, and under the throttling action of the throttling expansion device 2, it becomes a low-temperature and low-pressure liquid, and flows to the evaporator (such as an indoor heat exchanger set in the room), and vaporizes and absorbs heat in the indoor heat exchanger, thereby realizing cooling of the environment (such as indoors) on one side of the evaporator, and flows back to the compressor 3 after heat exchange, and circulates continuously, thereby realizing cooling.

[0043] In addition, when the thermal management system 100 needs to heat, the first end 1011 of the first heat exchange channel 101 is connected to the compressor 3, and the second end 1022 of the second heat exchange channel is synchronously connected to the compressor 3 and the throttling expansion device 2. At this time, the first heat exchange channel 101 and the second heat exchange channel 102 are in a parallel mode. In this way, the high-temperature and high-pressure gas of the compressor 3 can be converted into a low-temperature and low-pressure gas under the expansion action of the throttling expansion device 2 after heat release (for example, heat release in the indoor heat exchanger 1), and at the same time, it can flow to the compressor 3 synchronously through the first heat exchange channel 101 and the second heat exchange channel 102, and circulate continuously, thereby achieving heating.

[0044] In the heat exchanger 1 provided in the present disclosure, the throttling expansion device 2 can be of any appropriate type, and the present disclosure does not limit this. As an embodiment of the present disclosure, the throttling expansion device 2 can be an electronic expansion valve, the throttling expansion device 2 can also be a thermal expansion valve, or the throttling expansion device 2 can also be composed of a pressure expansion valve and a switch valve, and the present disclosure does not limit this.

[0045] In order to realize the switching between different working modes of the heat exchanger 1 (i.e. the series mode and the parallel mode of the first heat exchange channel 101 and the second heat exchange channel 102 mentioned above), Alternatively, if Figure 1 As shown, the heat exchanger 1 may further include a first valve 4, which is located on the connecting flow path between the second end 1022 of the second heat exchange channel 102 and the throttling expansion device 2. In this way, by controlling the first valve 4, the second end 1022 of the second heat exchange channel 102 and the throttling expansion device 2 can be connected or disconnected, that is, the second end 1022 of the second heat exchange channel 102 and the throttling expansion device 2 can be selectively connected.

[0046] For example, when the thermal management system 100 is in the cooling mode, the second end 1022 of the second heat exchange channel 102 is connected to the throttling expansion device 2 through the first valve 4, and the high-temperature and high-pressure gas flowing out of the compressor 3 can pass through the first heat exchange channel 101 and the second heat exchange channel 102 in turn, and flow to the throttling expansion device 2 through the first valve 4, and then flow to other structures in the thermal management system 100.

[0047] When the thermal management system 100 is in the heating mode, the flow path between the second end 1022 of the second heat exchange channel 102 and the throttling expansion device 2 is disconnected by the first valve 4. At this time, the low-temperature and low-pressure gas flowing out of the throttling expansion device 2 flows through the first end 1021 of the second heat exchange channel 102 to the second end 1022 of the second heat exchange channel 102, and then flows to the compressor 3.

[0048] Alternatively, if Figures 1 to 4 As shown, the heat exchanger 1 may further include a second valve 5, which is located on the connecting flow path between the second end 1022 of the second heat exchange channel 102 and the compressor 3. In this way, by controlling the second valve 5, the second end 1022 of the second heat exchange channel 102 and the compressor 3 can be connected or disconnected, that is, the second end 1022 of the second heat exchange channel 102 and the compressor 3 can be selectively connected.

[0049] For example, when the thermal management system 100 is in the cooling mode, the second end 1022 of the second heat exchange channel 102 is disconnected from the compressor 3 by the second valve 5. At this time, the high-temperature and high-pressure gas flowing out of the compressor 3 cannot flow to the throttling expansion device 2 through the second end 1022 of the second heat exchange channel 102, and will flow to the throttling expansion device 2 through the first heat exchange channel 101 and the second heat exchange channel 102 in turn, and flow to other structures in the thermal management system 100.

[0050] When the thermal management system 100 is in the heating mode, the second end 1022 of the second heat exchange channel 102 is connected to the compressor 3 through the second valve 5. At this time, the low-temperature and low-pressure gas flowing out through the throttling expansion device 2 can flow to the second end 1022 of the second heat exchange channel 102, and flow from the first end 1021 of the second heat exchange channel 102 to the compressor 3.

[0051] Alternatively, if Figures 1 to 4 As shown, the heat exchanger 1 may further include a third valve 6, which is located on the connecting flow path between the first end 1021 of the second heat exchange channel 102 and the throttling expansion device 2. In this way, by controlling the third valve 6, the first end 1021 of the second heat exchange channel 102 and the throttling expansion device 2 can be connected or disconnected, that is, the first end 1021 of the second heat exchange channel 102 and the throttling expansion device 2 can be selectively connected.

[0052] For example, when the thermal management system 100 is in the cooling mode, the first end 1021 of the second heat exchange channel 102 is disconnected from the throttling expansion device 2 through the third valve 6. The heat exchange medium flowing out through the first heat exchange channel 101 cannot flow to the throttling expansion device 2, and will flow to the throttling expansion device 2 through the second heat exchange channel 102. The second heat exchange channel 102 can achieve further cooling of the heat exchange medium, so that the heat exchange medium can have a higher degree of supercooling.

[0053] When the thermal management system 100 is in the heating mode, the first end 1021 of the second heat exchange channel 102 is connected to the throttling expansion device 2 through the third valve 6, and the low-temperature and low-pressure gas flowing out of the throttling expansion device 2 can flow to the first end 1021 of the second heat exchange channel 102 through the throttling expansion device 2, and flow to the compressor 3 through the second end 1022 of the second heat exchange channel 102.

[0054] Here, it should be noted that, in the heat exchanger 1 provided in the present disclosure, the control of the above-mentioned multiple heat exchange channels is not limited to the above-mentioned first valve 4, second valve 5 and third valve 6. The control of the above-mentioned multiple heat exchange channels can also be achieved through integrated valves, etc., and the present disclosure does not limit this.

[0055] In order to realize the connection between the second end 1022 of the second heat exchange channel 102 and the throttling expansion device 2, optionally, as Figure 1 As shown, the heat exchanger 1 further includes a first connecting flow path 103, one end of which is connected to the second end 1022 of the second heat exchange flow path 102, and the other end of the first connecting flow path 103 is suitable for being connected to the throttling expansion device 2, and the first valve 4 is located on the first connecting flow path 103. The first connecting flow path 103 can achieve communication between the second end 1022 of the second heat exchange flow path 102 and the throttling expansion device 2, so as to achieve flow of the heat exchange medium between the second heat exchange flow path 102 and the throttling expansion device 2.

[0056] As other embodiments of the present disclosure, the second end 1022 of the second heat exchange channel 102 may also be directly connected to the throttling expansion device 2 (for example, the throttling expansion device 2 is directly integrated into the heat exchanger 1 ), and the present disclosure does not limit this.

[0057] In order to realize the connection between the compressor 3 and the second end 1022 of the second heat exchange flow channel 102, optionally, as Figure 1As shown, the heat exchanger 1 further includes a second connecting flow path 104, one end of which is suitable for connecting to the compressor 3, and the other end of the second connecting flow path 104 is connected to the second end 1022 of the second heat exchange flow channel 102, and the second valve 5 is located on the second connecting flow path 104. The second connecting flow path 104 can achieve communication between the compressor 3 and the second end 1022 of the second heat exchange flow channel 102, so as to achieve the flow of heat exchange medium between the second heat exchange flow channel 102 and the compressor 3.

[0058] As other embodiments of the present disclosure, the second end 1022 of the second heat exchange channel 102 may also be directly connected to the compressor 3 (for example, the compressor 3 is directly integrated with the heat exchanger 1 ), which is not limited in the present disclosure.

[0059] In order to facilitate connecting the second end 1012 of the first heat exchange channel 101 and the first end 1021 of the second heat exchange channel 102 to the throttling expansion device 2, optionally, as Figure 1 As shown, the above-mentioned heat exchanger 1 also includes a third connecting flow path 105, one end of the third connecting flow path 105 is connected to the second end 1012 of the first heat exchange flow path 101 and the first end 1021 of the second heat exchange flow path 102, the other end of the third connecting flow path 105 is suitable for being connected to the first connecting flow path 103, and the third valve 6 is located on the third connecting flow path 105. The third connecting flow path 105 can realize the connection between the second end 1012 of the first heat exchange flow channel 101 and the first end 1021 of the second heat exchange flow channel 102 and the first connecting flow path 103, thereby realizing the connection between the second end 1012 of the first heat exchange flow channel 101 and the first end 1021 of the second heat exchange flow channel 102 and the throttling expansion device 2, and further realizing the flow of heat exchange medium between the second end 1012 of the first heat exchange flow channel 101, the first end 1021 of the second heat exchange flow channel 102 and the throttling expansion device 2. In this way, when the thermal management system 100 using the heat exchanger 1 is in the heating mode, the heat exchange medium can flow synchronously to the second heat exchange flow channel 102 and the first heat exchange flow channel 101 via the third connecting flow path 105.

[0060] In addition, since the second end 1012 of the first heat exchange channel 101 and the first end 1021 of the second heat exchange channel 102 can be connected to the throttling expansion device 2 through the third connecting flow path 105, the first heat exchange channel 101 and the second heat exchange channel 102 and the throttling expansion device 2 can share a flow path (i.e., part of the third connecting flow path 105), which is beneficial to reducing the flow path between the first heat exchange channel 101 and the second heat exchange channel 102 and the throttling expansion device 2, thereby simplifying the connection structure between the heat exchanger 1 and the throttling expansion device 2.

[0061] The present disclosure does not limit the specific type of the above-mentioned first valve 4. The above-mentioned first valve 4 can be any valve suitable for being arranged in the heat exchanger 1. As an embodiment of the present disclosure, the above-mentioned first valve 4 is a one-way valve, and the first valve 4 allows the heat exchange medium to flow unidirectionally from the second end 1022 of the second heat exchange channel 102 to the throttling expansion device 2.

[0062] The first valve 4 constructed as a one-way valve can achieve communication between the second end 1022 of the second heat exchange channel 102 and the throttling expansion device 2 when the thermal management system 100 is in the cooling mode, and can achieve disconnection between the throttling expansion device 2 and the second end 1022 of the second heat exchange channel 102 when the thermal management system 100 is in the heating mode, without repeatedly switching the working state. The first valve 4 constructed as a one-way valve has a simple structure, low cost and high reliability.

[0063] The present disclosure does not limit the specific type of the second valve 5. The second valve 5 can be any valve suitable for being arranged in the heat exchanger 1. As an embodiment of the present disclosure, the second valve 5 is a one-way valve, and the second valve 5 allows the heat exchange medium to flow from the second end 1022 of the second heat exchange channel 102 to the compressor 3 in one direction.

[0064] The second valve 5 constructed as a one-way valve can achieve the cutoff between the second end 1022 of the second heat exchange channel 102 and the compressor 3 when the thermal management system 100 is in the cooling mode, and can achieve the connection between the second end 1022 of the second heat exchange channel 102 and the compressor 3 when the thermal management system 100 is in the heating mode, without repeatedly switching the working state. The second valve 5 constructed as a one-way valve has a simple structure, low cost and high reliability.

[0065] The present disclosure does not limit the specific type of the third valve 6. The third valve 6 can be any valve suitable for being arranged in the heat exchanger 1. As an embodiment of the present disclosure, the third valve 6 is a one-way valve. The third valve 6 allows the heat exchange medium to flow from the throttling expansion device 2 into the first end 1021 of the second heat exchange channel 102 and the second end 1012 of the first heat exchange channel 101 in one direction.

[0066] The third valve 6 constructed as a one-way valve can, without repeatedly switching the working state, realize the cutoff between the first end 1021 of the second heat exchange channel 102 and the throttling expansion device 2 when the thermal management system 100 is in the cooling mode, and can realize the connection between the throttling expansion device 2 and the first end 1021 of the second heat exchange channel 102 when the thermal management system 100 is in the heating mode. The third valve 6 constructed as a one-way valve has a simple structure, low cost and high reliability.

[0067] Here, it can be understood that the first valve 4 configured as a one-way valve, the second valve 5 configured as a one-way valve, and the third valve 6 configured as a one-way valve are respectively arranged on the first connecting flow path 103, the second connecting flow path 104, and the third connecting flow path 105. In this way, taking the case where the thermal management system 100 is in the heating mode as an example, the low-temperature and low-pressure gas flowing out through the throttling expansion device 2 can flow to the first end 1021 of the second heat exchange flow path 102 through the third valve 6 configured as a one-way valve on the third connecting flow path 105, and flow out from the second end 1022 of the second heat exchange flow path 102 to the first connecting flow path 103. At this time, since the heat exchange medium flowing out through the second end 1022 of the second heat exchange flow path 102 has a greater flow distance, the heat exchange medium flowing out through the second end 1022 of the second heat exchange flow path 102 can flow to the first end 1021 of the second heat exchange flow path 102 through the third valve 6 configured as a one-way valve on the third connecting flow path 105. The pressure of the heat exchange medium flowing to the first connecting flow path 103 is lower than the pressure flowing from the throttling expansion device 2 to the third connecting flow path 105, that is, lower than the pressure on the side of the second valve 5 configured as a one-way valve close to the throttling expansion device 2, so that the heat exchange medium flowing to the first connecting flow path 103 through the second end 1022 of the second heat exchange flow channel 102 will flow to the compressor 3 through the first valve 4 configured as a one-way valve on the second connecting flow path 104 under the action of the pressure difference, and will not flow toward the throttling expansion device 2 through the second valve 5. When the thermal management system 100 is in the cooling mode, similarly, the pressure difference on both sides of the first valve 4, the second valve 5 and the third valve 6 configured as one-way valves can make the heat exchange medium flow in a preset direction, which is more ingenious, and the first valve 4, the second valve 5 and the third valve 6 are configured as one-way valves, so that the valve structure is simple, the cost is low and the reliability is high, and it is allowed not to set a controller to control the switching of the first valve 4, the second valve 5 and the third valve 6.

[0068] As other embodiments of the present disclosure, one or more of the first valve 4, the second valve 5 and the third valve 6 may also be constructed as a solenoid valve and a reversing valve, etc., which is not limited in the present disclosure.

[0069] In order to facilitate connecting the first heat exchange channel 101, the second heat exchange channel 102 and the second connecting channel 104 to the compressor 3, optionally, as Figures 1 to 4 As shown, at least one of the first end 1011 of the first heat exchange channel 101 , the second end 1022 of the second heat exchange channel 102 , and one end of the second connecting channel 104 is connected to the compressor 3 through the air collecting pipe 106 of the heat exchanger 1 .

[0070] In this way, by connecting one or more of the first end 1011 of the first heat exchange channel 101, the second end 1022 of the second heat exchange channel 102, and one end of the second connecting flow path 104 to the collecting pipe 106, and connecting the collecting pipe 106 to the compressor 3, there is no need to set up multiple pipelines between the heat exchanger 1 and the compressor 3. The connection between the multiple flow paths in the heat exchanger 1 and the compressor 3 can be achieved through one collecting pipe 106, which is conducive to simplifying the connection structure between the heat exchanger 1 and the compressor 3.

[0071] Alternatively, if Figures 1 to 4 As shown, the second end 1012 of the first heat exchange channel 101 and the first end 1021 of the second heat exchange channel 102 are connected through the liquid collecting pipe 107 of the heat exchanger 1, and the liquid collecting pipe 107 is suitable for connecting to the throttling expansion device 2 through the third connecting flow path 105. In this way, the connection between the throttling expansion device 2 and the second end 1012 of the first heat exchange channel 101 and the first end 1021 of the second heat exchange channel 102 can be achieved through the liquid collecting pipe 107 and the third connecting flow path 105.

[0072] In order to further improve the heating performance of the thermal management system 100 using the heat exchanger 1, optionally, as Figures 1 to 4 As shown, there are multiple first heat exchange channels 101, and the multiple first heat exchange channels 101 are arranged in parallel. The total cross-sectional area of ​​the multiple first heat exchange channels 101 arranged in parallel is large, which can make the heat exchange medium have a larger flow area, thereby reducing the flow resistance of the heat exchange medium, and further increasing the suction pressure of the compressor 3, thereby further improving the heating performance of the thermal management system 100 using the heat exchanger 1.

[0073] Alternatively, if Figures 1 to 4 As shown, the number of the first heat exchange channels 101 is at least three.

[0074] Here, it should be noted that the present disclosure does not limit the specific arrangement of the above-mentioned multiple first heat exchange channels 101, as long as the multiple first heat exchange channels 101 can meet the layout requirements of the heat exchanger 1. As an embodiment of the present disclosure, the above-mentioned multiple first heat exchange channels 101 are arranged side by side in the same direction (for example, the length direction of the heat exchanger 1, or the width direction of the heat exchanger 1), and the multiple first heat exchange channels 101 arranged side by side in the same direction can be adapted to the shape of the heat exchanger 1, thereby facilitating the layout of the heat exchanger 1 in, for example, a user's home (such as an air conditioner outdoor unit installation site).

[0075] The present disclosure does not limit the quantitative relationship between the first heat exchange channel 101 and the second heat exchange channel 102. As an implementation method of the present disclosure, Figures 1 to 4As shown, the number of the first heat exchange channels 101 is three, and the number of the second heat exchange channels 102 is one. The three first heat exchange channels 101 and the second heat exchange channels 102 cooperate with each other, which can enable the thermal management system 100 using the heat exchanger 1 to have better cooling performance, and also enable the thermal management system 100 to have better heating performance.

[0076] In the present disclosure, the first heat exchange channel 101 and the second heat exchange channel 102 can have any appropriate type, and the present disclosure does not limit this. Optionally, the first heat exchange channel 101 and the second heat exchange channel 102 are both composed of a plurality of U-shaped tubes. On the one hand, the first heat exchange channel 101 and the second heat exchange channel 102 composed of a plurality of U-shaped tubes can have a longer length, so that the heat exchange medium can have a larger heat exchange area, thereby improving the heat exchange effect of the heat exchange medium; on the other hand, the first heat exchange channel 101 and the second heat exchange channel 102 composed of a plurality of U-shaped tubes are arranged in a three-dimensional structure, occupying less space in the horizontal direction and having higher compactness.

[0077] Optionally, each of the first heat exchange channel 101 and the second heat exchange channel 102 is composed of 6 U-shaped tubes.

[0078] As other embodiments of the present disclosure, the first heat exchange channel 101 and the second heat exchange channel 102 may also be formed in a heat exchange plate, which is not limited in the present disclosure.

[0079] According to a second aspect of the present disclosure, a thermal management system 100 is provided, comprising a compressor 3, a reversing valve 7, a first heat exchanger 8, a second heat exchanger 9 and a throttling expansion device 2 connected in series to form a loop, wherein the heat exchange medium flowing out through the outlet of the compressor 3 is arranged to be able to selectively flow through the first heat exchanger 8 and then through the second heat exchanger 9 through the reversing valve 7, or, selectively flow through the second heat exchanger 9 and then through the first heat exchanger 8, that is, the heat exchange medium flowing out through the outlet of the compressor 3 is arranged to be able to selectively flow through one of the first heat exchanger 8 and the second heat exchanger 9 through the reversing valve 7, and then flow through the other of the first heat exchanger 8 and the second heat exchanger 9, and at least one of the first heat exchanger 8 and the second heat exchanger 9 is the heat exchanger 1 as described above.

[0080] The compressor 3, the reversing valve 7, the first heat exchanger 8, the second heat exchanger 9 and the throttling expansion device 2 cooperate with each other to realize the circulation and heat exchange of the heat exchange medium in the thermal management system 100, thereby realizing the cooling and heating of the thermal management system 100.

[0081] The thermal management system 100 has all the beneficial effects of the above-mentioned heat exchanger 1, which will not be described in detail here.

[0082] In order to avoid damage to the compressor 3, optionally, as Figures 2 to 4 As shown, the thermal management system 100 may further include a gas-liquid separator 10, which is disposed at the inlet of the compressor 3. Thus, when the heat exchange medium flows in from the inlet of the compressor 3, the gas-liquid separator 10 can separate the liquid in the heat exchange medium and allow the gas in the heat exchange medium to flow into the compressor 3, thereby effectively preventing the liquid heat exchange medium from flowing into the compressor 3, causing damage to the compressor 3, and improving the service life of the compressor 3.

[0083] Optionally, the first heat exchanger 8 is the heat exchanger 1 described above, and the first heat exchanger 8 is an outdoor heat exchanger 1 , and the second heat exchanger 9 is an indoor heat exchanger 1 .

[0084] In this way, when the thermal management system 100 is in the cooling mode, the first heat exchanger 8 arranged outdoors can be used as a condenser to cool the heat exchange medium, and the second heat exchanger 9 arranged indoors can be used as an evaporator to absorb heat from the heat exchange medium, thereby achieving cooling of the interior (such as the interior of a building, or the passenger compartment of a vehicle).

[0085] When the thermal management system 100 is in the heating mode, the second heat exchanger 9 arranged indoors can be used as a condenser to realize the heat release of the heat exchange medium, and the first heat exchanger 8 arranged outdoors can be used as an evaporator to realize the heat absorption of the heat exchange medium, and it is continuously circulated through the compressor 3, so as to realize heating (such as indoors in a building, or in the passenger compartment of a vehicle).

[0086] Alternatively, if Figures 2 to 4 As shown, the thermal management system 100 further includes a first angle valve 11 and a second angle valve 12, wherein the first angle valve 11 is arranged between the throttling expansion device 2 and the second heat exchanger 9, and the second angle valve 12 is arranged between the second heat exchanger 9 and the reversing valve 7. The first angle valve 11 and the second angle valve 12 cooperate with each other to control the flow rate and pressure of the heat exchange medium in the thermal management system 100, thereby ensuring that the thermal management system 100 can operate under better working conditions.

[0087] In addition, the first angle valve 11 and the second angle valve 12 can also cut off the flow of heat exchange medium between some structures in the thermal management system 100, so as to facilitate the inspection and maintenance of the thermal management system 100.

[0088] In order to enable the thermal management system 100 to have different working modes, optionally, as Figures 2 to 4As shown, the above-mentioned reversing valve 7 is a four-way valve, having a first valve port 71, a second valve port 72, a third valve port 73 and a fourth valve port 74. The first valve port 71 is suitable for being connected to the outlet of the compressor 3, the second valve port 72 is suitable for being connected to the inlet of the compressor 3, the third valve port 73 is suitable for being connected to the first heat exchange channel 101 in the first heat exchanger 8, and the fourth valve port 74 is suitable for being connected to the heat exchange medium opening in the second heat exchanger 9.

[0089] By connecting or cutting off one or more of the first valve port 71, the second valve port 72, the third valve port 73 and the fourth valve port 74, the flow direction of the heat exchange medium in the entire thermal management system 100 can be changed, and by reasonably selecting the working modes of the first heat exchanger 8 and the second heat exchanger 9, the thermal management system 100 can have different working modes.

[0090] In order to facilitate the connection of the compressor 3, the reversing valve 7, the first heat exchanger 8, the second heat exchanger 9 and the throttling expansion device 2 in series into a loop, optionally, as Figures 2 to 4 As shown, the thermal management system 100 further includes a first pipeline 13 , a second pipeline 14 , a third pipeline 15 , a fourth pipeline 16 , a fifth pipeline 17 and a sixth pipeline 18 .

[0091] The outlet of the compressor 3 is connected to the first valve port 71 of the four-way valve through the first pipeline 13, the third valve port 73 of the four-way valve is connected to the gas collecting pipe 106 of the first heat exchanger 8 through the second pipeline 14, the gas collecting pipe 106 is connected to the first end 1011 of the first heat exchange flow channel 101, and is connected to the first end 1021 of the second heat exchange flow channel 102 through the second connecting flow channel 104, the second end 1022 of the second heat exchange flow channel 102 is connected to the first end of the first connecting flow channel 103, the second end 1012 of the first heat exchange flow channel 101 and the first end 1021 of the second heat exchange flow channel 102 are connected through the second connecting flow channel 104. The third connecting flow path 105 is connected to the second end of the first connecting flow path 103, the second end of the first connecting flow path 103 is connected to the throttling expansion device 2 through the third pipeline 15, the other end of the throttling expansion device 2 is connected to one end of the second heat exchanger 9 through the fourth pipeline 16, the other end of the second heat exchanger 9 is connected to the fourth valve port 74 of the four-way valve through the fifth pipeline 17, and the fourth valve port 74 of the four-way valve is connected to the inlet of the compressor through the sixth pipeline 18, the first angle valve 11 and the second angle valve 12 are respectively arranged on the fourth pipeline 16 and the fifth pipeline 17, and the gas-liquid separator 10 is arranged on the sixth pipeline 18.

[0092] The first pipeline 13, the second pipeline 14, the third pipeline 15, the fourth pipeline 16, the fifth pipeline 17 and the sixth pipeline 18 can connect the compressor 3, the reversing valve 7, the first heat exchanger 8, the second heat exchanger 9 and the throttling expansion device 2 in series into a loop, thereby realizing the circulation flow of the heat exchange medium in the thermal management system 100.

[0093] The following will be based on Figures 2 to 4 , briefly discusses the specific working process of the thermal management system 100 provided by the present application in the cooling mode and the heating mode: When the thermal management system 100 is in the cooling mode, the compressor 3 works to output high-temperature and high-pressure gas to the outside. The high-temperature and high-pressure gas can flow to the first heat exchanger 8 through the first valve port 71, the third valve port 73 of the reversing valve 7 and the gas collecting pipe 106 in sequence, and flow through the first heat exchange channel 101 and the second heat exchange channel 102 arranged in series in the first heat exchanger 8 (i.e., the outdoor heat exchanger 1) in sequence. At this time, the first heat exchanger 8 is a condenser, and the heat exchange medium can flow out of the first heat exchanger 8 after cooling. The heat exchange medium flowing out of the first heat exchanger 8 can flow to the second heat exchanger 9 (i.e., the indoor heat exchanger 1) after passing through the throttling effect of the throttling expansion device 2. At this time, the second heat exchanger 9 is an evaporator, and the heat exchange medium can absorb heat at the second heat exchanger 9, and flow back to the compressor 3 through the fourth valve port 74 and the second valve port 72 of the reversing valve 7, and circulate continuously to achieve refrigeration.

[0094] Since the heat exchange medium can be cooled successively through the first heat exchange channel 101 and the second heat exchange channel 102 when flowing through the first heat exchanger 8, the heat exchange medium has a high degree of supercooling, so that the thermal management system 100 can have better refrigeration performance.

[0095] When the thermal management system 100 is in the heating mode, the compressor 3 works to output high-temperature and high-pressure gas to the outside. The high-temperature and high-pressure gas can flow to the second heat exchanger 9 (i.e., the indoor heat exchanger 1) through the first valve port 71 and the fourth valve port 74 of the reversing valve 7 in sequence. At this time, the second heat exchanger 9 is a condenser, and the heat exchange medium can release heat at the second heat exchanger 9. The heat exchange medium flowing out of the second heat exchanger 9 can flow to the first heat exchanger 8 (i.e., the outdoor heat exchanger 1) under the expansion action of the throttling expansion device 2. At this time, the first heat exchanger 8 is an evaporator, and the heat exchange medium can absorb heat at the first heat exchanger 8, and flow back to the compressor 3 through the third valve port 73 and the second valve port 72 of the reversing valve 7, and circulate continuously.

[0096] Since the heat exchange medium can synchronously flow from the parallel first heat exchange channel 101 and the second heat exchange channel 102 to the compressor 3 when flowing through the first heat exchanger 8, the flow resistance of the heat exchange medium in the first heat exchange channel 101 and the second heat exchange channel 102 is small, and the compressor 3 can have a higher suction pressure, so that the thermal management system 100 can have better heating performance.

[0097] The present disclosure does not limit the specific type of the heat exchange medium in the thermal management system 100. As an embodiment of the present disclosure, the heat exchange medium is R290 refrigerant. R290 refrigerant has good refrigeration performance, low cost, and good environmental protection.

[0098] In addition, since the heat exchanger of the thermal management system 100 provided by the present application can have different heat exchange channels when in different working modes, that is, when used as a condenser or an evaporator, that is, when the heat exchanger 1 is used as a condenser, it can have a smaller number of heat exchange channels with a larger degree of supercooling, and when the heat exchanger is used as an evaporator, it can have a larger number of heat exchange channels, and can have better heating and cooling performance. In this way, even if the unit volume cooling capacity of the R290 refrigerant is low, the thermal management system 100 can also have better cooling and heating performance.

[0099] As other embodiments of the present disclosure, the heat exchange medium may also be R600a, R744, etc., which is not limited in the present disclosure.

[0100] According to a third aspect of the present disclosure, an air conditioning device is provided, such as the thermal management system 100 as described above.

[0101] The air conditioning device has all the beneficial effects of the thermal management system 100 described above, which will not be described in detail here.

[0102] Here, it should be noted that the present disclosure does not limit the specific type of the above-mentioned air-conditioning equipment. The above-mentioned air-conditioning equipment may be a household air-conditioner for realizing cooling and heating in the user's home, or the above-mentioned air-conditioning equipment may also be an on-board air-conditioner of a vehicle, which can realize cooling and heating of the passenger compartment. The present disclosure does not limit this.

[0103] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0104] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0105] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A heat exchanger, characterized in that: include: At least one first heat exchange flow channel, used for allowing a heat exchange medium to pass through and capable of exchanging heat with the heat exchange medium; and The second heat exchange flow channel is used for allowing the heat exchange medium to pass through and can exchange heat with the heat exchange medium; Wherein, the heat exchanger is configured such that when used as a condenser, the first heat exchange channel and the second heat exchange channel are connected in series; The heat exchanger is configured such that when used as an evaporator, the first heat exchange channel and the second heat exchange channel are connected in parallel.

2. The heat exchanger according to claim 1, characterized in that: The second heat exchange flow channel includes a subcooling flow channel of the heat exchanger.

3. The heat exchanger according to claim 1 or 2, characterized in that: The first end of the first heat exchange channel is suitable for being connected to a compressor of a thermal management system, and the second end of the first heat exchange channel is connected to the first end of the second heat exchange channel; The second end of the second heat exchange channel is adapted to be selectively connected to a throttling expansion device of the thermal management system; Furthermore, the second end of the second heat exchange channel is suitable for being selectively connected to the compressor.

4. The heat exchanger according to claim 3, characterized in that: The heat exchanger further comprises a first valve, wherein the first valve is located on a connecting flow path between the second end of the second heat exchange flow channel and the throttling expansion device; and / or, The heat exchanger further comprises a second valve, wherein the second valve is located on a connecting flow path between the second end of the second heat exchange flow channel and the compressor; and / or, The heat exchanger further includes a third valve, which is located on a connecting flow path between the first end of the second heat exchange flow channel and the throttling expansion device.

5. The heat exchanger according to claim 4, characterized in that: The heat exchanger further comprises a first connecting flow path, one end of which is connected to the second end of the second heat exchange flow channel, the other end of which is suitable for being connected to the throttling expansion device, and the first valve is located on the first connecting flow path; and / or, The heat exchanger also includes a second connecting flow path, one end of which is suitable for connecting to the compressor, the other end of which is connected to the second end of the second heat exchange channel, and the second valve is located on the second connecting flow path.

6. The heat exchanger according to claim 5, characterized in that The heat exchanger further comprises a third connecting flow path; One end of the third connecting flow path is connected to the second end of the first heat exchange flow path and the first end of the second heat exchange flow path, the other end of the third connecting flow path is suitable for connecting to the first connecting flow path, and the third valve is located on the third connecting flow path.

7. The heat exchanger according to claim 6, characterized in that The first valve is a one-way valve, and the first valve allows the heat exchange medium to flow from the second end of the second heat exchange channel to the throttling expansion device in one direction; and / or, The second valve is a one-way valve, and the second valve allows the heat exchange medium to flow from the second end of the second heat exchange flow channel to the compressor in one direction; and / or, The third valve is a one-way valve, and the third valve allows the heat exchange medium to flow from the throttling expansion device into the first end of the second heat exchange channel and the second end of the first heat exchange channel in one direction.

8. The heat exchanger according to claim 6, characterized in that At least one of the first end of the first heat exchange channel, the second end of the second heat exchange channel, and one end of the second connecting channel is suitable for being connected to the compressor through the gas collecting pipe of the heat exchanger; and / or, The second end of the first heat exchange channel and the first end of the second heat exchange channel are connected via a liquid collecting pipe of the heat exchanger, and the liquid collecting pipe is suitable for being connected to the throttling expansion device via the third connecting flow path.

9. The heat exchanger according to claim 1 or 2, characterized in that: There are multiple first heat exchange channels, and the multiple first heat exchange channels are arranged in parallel.

10. The heat exchanger according to claim 9, characterized in that The number of the first heat exchange channels is at least three.

11. A thermal management system, characterized in that: It includes a compressor, a reversing valve, a first heat exchanger, a second heat exchanger and a throttling expansion device which are connected in series to form a loop; Wherein, the heat exchange medium flowing out through the outlet of the compressor can selectively flow through the first heat exchanger and then through the second heat exchanger through the reversing valve, or selectively flow through the second heat exchanger and then through the first heat exchanger; At least one of the first heat exchanger and the second heat exchanger is a heat exchanger according to any one of claims 1-10.

12. The thermal management system according to claim 11, characterized in that: The first heat exchanger is a heat exchanger according to any one of claims 1 to 10; And the first heat exchanger is an outdoor heat exchanger, and the second heat exchanger is an indoor heat exchanger.

13. The thermal management system according to claim 11 or 12, characterized in that: The reversing valve is a four-way valve having a first valve port, a second valve port, a third valve port and a fourth valve port; The first valve port is suitable for being connected to the outlet of the compressor, and the second valve port is suitable for being connected to the inlet of the compressor; The third valve port is suitable for connecting to the first heat exchange channel in the first heat exchanger; The fourth valve port is suitable for being connected to a heat exchange medium opening in the second heat exchanger.

14. An air conditioning device, characterized in that: Comprising a thermal management system according to any one of claims 11-13.

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