Heat exchange tube, heat exchanger, vehicle heat management system and vehicle

Abstract

The invention relates to a heat exchange tube, a heat exchanger, a vehicle heat management system and a vehicle, the heat exchange tube comprises a first flow channel and a second flow channel which are isolated from each other, and the first flow channel and the second flow channel have different flow passing capacities. According to the heat exchange tube, the first flow channel and the second flow channel which enable the heat exchange working medium to have different flow passing capacities when the heat exchange working medium flows are adopted on the heat exchange tube, the heat exchange tube adapts to the state change when the heat exchange working medium flows in the first flow channel and the second flow channel, the pressure drop of the heat exchange working medium is reduced, and it is guaranteed that the heat exchange working medium has relatively uniform passing performance in all positions in the heat exchange tube; the heat exchange performance of each part of the heat exchange tube is relatively uniform, so that the heat exchange capability of the heat exchange tube is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle-mounted heat exchange equipment, and in particular to a heat exchange tube, a heat exchanger, a vehicle thermal management system, and a vehicle. Background Art

[0002] Currently, in heat exchangers such as evaporators and condensers, for the flow path of the heat exchange medium, for example, the refrigerant, the heat exchange effect is often improved by increasing the distance the refrigerant passes through the heat exchanger.

[0003] Refrigerant undergoes phase change during the heat exchange process. Changes in parameters such as flow rate and pressure caused by phase change in the refrigerant as it flows through the heat exchanger will reduce the refrigerant's heat exchange efficiency. For example, when the refrigerant flows through the evaporator, it gradually vaporizes compared to the upstream part of the flow path, resulting in a significant pressure drop between the upstream and downstream parts of the refrigerant. This pressure drop results in poor refrigerant flow, which, during the refrigerant cycle, significantly reduces the effectiveness of subsequent refrigerant pressurization processes such as compressors. At the same time, excessive refrigerant pressure drop also results in insufficient heat exchange uniformity between the upstream and downstream parts of the flow pipeline, affecting the heat exchange capacity of the heat exchanger. Summary of the Invention

[0004] The embodiments of the present application provide a heat exchange tube, a heat exchanger, a vehicle thermal management system, and a vehicle, which improve the heat exchange effect of the heat exchanger to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present application, a heat exchange tube is provided, comprising a first flow channel and a second flow channel isolated from each other, wherein the first flow channel and the second flow channel have different flow capacities.

[0006] Optionally, the flow capacity of the first flow channel is smaller than the flow capacity of the second flow channel.

[0007] Optionally, a flow cross-sectional area of the first flow channel is smaller than a flow cross-sectional area of the second flow channel.

[0008] Optionally, a ratio of a flow cross-sectional area of the first flow channel to a flow cross-sectional area of the second flow channel is greater than 1 and less than or equal to 2.

[0009] Optionally, the heat exchange tube is configured as a flat tube.

[0010] Optionally, the first flow channel is configured as at least one first type flow guide hole formed on the heat exchange tube; and / or,

[0011] The second flow channel is configured as at least one second type flow guide hole formed on the heat exchange tube.

[0012] Optionally, the first type of guide holes has a different caliber from the second type of guide holes; and / or,

[0013] The number of the first type of guide holes and the number of the second type of guide holes are set differently.

[0014] According to a second aspect of the present application, a heat exchanger is provided, comprising: the heat exchange tube as described above.

[0015] Optionally, the heat exchanger includes a plurality of heat exchange tubes; the plurality of heat exchange tubes are arranged at intervals along the first direction.

[0016] Optionally, the heat exchanger further comprises:

[0017] The heat conductor is arranged between two adjacent heat exchange tubes and is used for conducting heat between the two adjacent heat exchange tubes.

[0018] Optionally, the heat exchanger further comprises:

[0019] A manifold is connected to at least one of the first flow channel and the second flow channel to allow heat exchange medium to flow into or out of the first flow channel / the second flow channel.

[0020] Optionally, the header comprises:

[0021] The first manifold is connected to one end of the first flow channel to allow heat exchange medium to flow into or out of the first flow channel.

[0022] a second manifold connected to one end of the second flow channel for allowing the heat exchange medium to flow into or out of the second flow channel;

[0023] The first header and the second header are connected to each other so that the heat exchange medium flows between the first flow channel and the second flow channel.

[0024] Optionally, the header further includes:

[0025] a third manifold connected to the other end of the first flow channel to allow the heat exchange medium to flow into or out of the first flow channel;

[0026] a fourth manifold connected to the other end of the second flow channel to allow the heat exchange medium to flow into or out of the second flow channel;

[0027] The third manifold is connected to the first manifold through the first flow channel; the fourth manifold is connected to the second manifold through the second flow channel.

[0028] Optionally, the third header and the fourth header are arranged at the same end in the extension direction of the plurality of heat exchange tubes.

[0029] Optionally, the heat exchanger further comprises:

[0030] In a heat exchange flow path formed by the third header, the first flow channel, the first header, the second header, the second flow channel, and the fourth header for the heat exchange working medium to flow, one of the third header and the fourth header is provided with a working medium inlet for the heat exchange working medium to flow into the heat exchange flow path, and the other of the third header and the fourth header is provided with a working medium outlet for the heat exchange working medium to flow out of the heat exchange flow path;

[0031] Wherein, the working medium outlet and the working medium inlet are located at the same end of the heat exchange tube along the first direction.

[0032] According to a third aspect of the present application, a vehicle thermal management system is provided, comprising the heat exchanger as described above.

[0033] Optionally, the thermal management system includes a plurality of the heat exchangers; the plurality of heat exchangers include a first heat exchanger and a second heat exchanger;

[0034] The first port of the first heat exchanger for the heat exchange medium to flow in or out is connected to the second port of the second heat exchanger for the heat exchange medium to flow in or out.

[0035] Optionally, the vehicle thermal management system further includes:

[0036] The first electronic expansion valve is arranged between the first heat exchanger and the second heat exchanger.

[0037] Optionally, the vehicle thermal management system further includes:

[0038] A compressor, used to drive the heat exchange medium;

[0039] The compressor is connected to the first heat exchanger and / or the second heat exchanger to deliver the heat exchange medium to the first heat exchanger and / or the second heat exchanger.

[0040] Optionally, the vehicle thermal management system further includes:

[0041] An external heat exchanger, used for exchanging heat between the heat exchange medium and the environment outside the vehicle;

[0042] a second electronic expansion valve, disposed between the external heat exchanger and the first heat exchanger;

[0043] Wherein, the compressor is connected to the external heat exchanger to deliver the heat exchange medium to the external heat exchanger.

[0044] Optionally, the vehicle thermal management system further includes:

[0045] The switching device is used to switch the flow direction of the heat exchange medium in the vehicle thermal management system so that the vehicle thermal management system has at least a first working state and a second working state.

[0046] Optionally, when the vehicle thermal management system is in the first working state, the first heat exchanger and the second heat exchanger heat the vehicle compartment, and the external heat exchanger cools the environment outside the vehicle.

[0047] Optionally, when the vehicle thermal management system is in the second working state, the external heat exchanger releases heat to the outside environment, and the first heat exchanger cools the vehicle compartment.

[0048] Optionally, the switching device includes:

[0049] a heat exchange switching valve having a first valve port communicating with the outlet of the compressor, a second valve port communicating with the external heat exchanger, a third valve port communicating with the second heat exchanger, and a fourth valve port communicating with the inlet of the compressor;

[0050] Wherein, when the vehicle thermal management system is in the first working state, the first valve port is communicated with the third valve port, and the second valve port is communicated with the fourth valve port.

[0051] Optionally, when the vehicle thermal management system is in the second working state, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port.

[0052] Optionally, the switching device further includes:

[0053] A one-way valve is provided between the third valve port and the second heat exchanger to realize one-way passage of the heat exchange medium from the third valve port to the second heat exchanger.

[0054] Optionally, the switching device further includes:

[0055] an on-off valve, disposed between the third valve port and the first heat exchanger, for controlling the on-off of the third valve port and the first heat exchanger;

[0056] When the vehicle thermal management system is in the second working state, the second heat exchanger is connected to the third valve port through the switching valve.

[0057] According to a fourth aspect of the present application, a vehicle is provided, comprising the heat pipe as described above, or comprising the heat exchanger as described above, or comprising the vehicle thermal management system as described above.

[0058] In the heat exchange tube of the embodiment of the present application, through the above-mentioned technical solution, a first flow channel and a second flow channel with different flow capacities when the heat exchange medium flows through are adopted on the heat exchange tube, which adapts to the state changes of the heat exchange medium when it flows in the first flow channel and the second flow channel, reduces the pressure drop of the heat exchange medium, and ensures that it has relatively uniform flow performance at various locations in the heat exchange tube. The heat exchange performance at various locations of the heat exchange tube is relatively uniform, thereby improving the heat exchange capacity of the heat exchange tube.

[0059] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0061] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0062] Figure 1 is a schematic diagram of the overall structure of a heat exchanger provided in an exemplary embodiment of the present application;

[0063] Figure 2 is a cross-sectional view of a heat exchanger provided in an exemplary embodiment of the present application;

[0064] Figure 3 is a schematic structural diagram of a heat exchange tube provided in an exemplary embodiment of the present application;

[0065] Figure 4 is a schematic diagram of the overall structure of a vehicle thermal management system provided in an exemplary embodiment of the present application;

[0066] Figure 5 yes Figure 4 A schematic structural diagram of the vehicle thermal management system shown is in a first working state;

[0067] Figure 6 yes Figure 4 A schematic structural diagram of the vehicle thermal management system shown in FIG. 1 is in a second operating state;

[0068] Figure 7 It is a schematic diagram of the overall structure of a vehicle provided in an exemplary embodiment of the present application.

[0069] Description of reference numerals:

[0070] 1. Vehicle;

[0071] 10. Vehicle thermal management system;

[0072] 11. First heat exchanger; 12. Second heat exchanger; 13. First electronic expansion valve; 14. Compressor; 15. External heat exchanger; 16. Second electronic expansion valve; 17. Heat exchange switching valve; 17a. First valve port; 17b. Second valve port; 17c. Third valve port; 17d. Fourth valve port; 18. One-way valve; 19. On / off valve;

[0073] 100. Heat exchanger;

[0074] 110, first header; 120, second header; 130, third header; 140, fourth header; 150, heat conductor;

[0075] 1000, heat exchange tube;

[0076] 1100, first type entity; 1110, first type diversion hole; 1200, second type entity; 1210, second type diversion hole;

[0077] L1, first direction; L2, second direction. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0079] The present application provides a heat exchange tube 1000, a heat exchanger 100, a vehicle thermal management system 10 and a vehicle 1. Figures 1 to 3 As shown, according to the first aspect of the present application, the heat exchange tube 1000 provided by the present application includes a first flow channel and a second flow channel isolated from each other, wherein the first flow channel and the second flow channel have different flow capacities. The heat exchange tube 1000 can be used to allow a heat exchange medium to pass through.

[0080] For specific plans, refer to Figure 3As shown, this application defines the entity forming the first flow channel on the heat exchange tube 1000 as a first-type entity 1100. A heat exchange medium can flow in the first flow channel and exchange heat with the external environment or external equipment through the first-type entity. Correspondingly, this application defines the entity forming the second flow channel on the heat exchange tube 1000 as a second-type entity 1200. A heat exchange medium can flow in the second flow channel and exchange heat with the external environment or external equipment through the second-type entity 1200. In a more specific embodiment, the heat exchange medium in the first flow channel and the second flow channel can circulate between each other through more pipes, that is, the heat exchange medium can circulate between the first flow channel and the second flow channel. As a specific solution, the heat exchange medium mentioned in this application can be, for example, a refrigerant. Accordingly, the heat exchange tube 1000 can be integrated into a heat exchanger 100. After the heat exchanger 100 is integrated into a vehicle or other equipment, it serves as part of the structure that provides a flow path for the refrigerant to circulate, thereby realizing part of the functions of the vehicle thermal management system 10.

[0081] Through the above technical solution, the first flow channel and the second flow channel with different flow capacities when the heat exchange medium flows through are adopted on the heat exchange tube 1000, which adapts to the state change of the heat exchange medium when it flows in the first flow channel and the second flow channel, reduces the pressure drop of the heat exchange medium, and ensures that it has relatively uniform flow performance at various places in the heat exchange tube 1000. The heat exchange performance at various places of the heat exchange tube 1000 is relatively uniform, thereby improving the heat exchange capacity of the heat exchange tube 1000.

[0082] In some embodiments, the flow capacity of the first flow channel is smaller than the flow capacity of the second flow channel. That is, the force acting on the heat exchange medium, provided by the second-type entity 1200, which impedes the flow of the heat exchange medium, when the heat exchange medium flows through the second flow channel is smaller than the force acting on the heat exchange medium, provided by the first-type entity 1100, which impedes the flow of the heat exchange medium, when the heat exchange medium flows through the first flow channel. In a specific embodiment, the process of the refrigerant converting from a gaseous state to a liquid state / a gas-liquid mixture within the heat exchange tube 1000 can be configured to occur during the process of the refrigerant flowing from the second flow channel to the first flow channel; alternatively, the process of the refrigerant converting from a liquid state / a gas-liquid mixture to a gaseous state within the heat exchange tube 1000 can be configured to occur during the process of the refrigerant flowing from the first flow channel to the second flow channel. Taking into account that the heat exchange medium has its own parameters such as phase change and pressure drop during its flow process, and these parameter changes will cause the heat exchange medium's flow performance to gradually decrease when flowing through the heat exchange tube 1000, the setting that the flow capacity of the first flow channel is smaller than the flow capacity of the second flow channel reduces the degree of decrease in the flow performance during the flow of the heat exchange medium.

[0083] In a specific solution, the flow capacity of the first flow channel can be reduced by configuring the flow cross-sectional area of the first flow channel to be smaller than the flow cross-sectional area of the second flow channel. As an exemplary illustration of a specific solution, by varying the flow cross-sectional area of the first and second flow channels, the pressure drop of the refrigerant can be relatively reduced during the process of flowing through the heat exchange tube 1000 and exchanging heat with the outside world, thereby facilitating the uniform distribution of the refrigerant to each flow channel and improving the uniformity of the refrigerant flow distribution.

[0084] Considering that when the difference between the flow cross-sectional area of the first flow channel and the flow cross-sectional area of the second flow channel is too large, the flow rate and flow rate of the heat exchange medium may be suppressed, resulting in obstruction of the flow of the heat exchange medium, which may limit the heat exchange capacity of the heat exchanger 100. In some embodiments, the ratio of the flow cross-sectional area of the first flow channel to the flow cross-sectional area of the second flow channel is greater than 1 and less than 2.

[0085] In some embodiments, the first flow channel is configured as at least one first-type flow guide hole 1110 formed on the heat exchange tube 1000; and / or, the second flow channel is configured as at least one second-type flow guide hole 1210 formed on the heat exchange tube 1000. As a specific solution, the first-type flow guide hole 1110 may be provided on the first-type entity 1100, and the second-type flow guide hole 1210 may be provided on the second-type entity 1200. When the refrigerant flows through the heat exchange tube 1000, it specifically flows through the first-type flow guide hole 1110 and / or the second-type flow guide hole 1210 and exchanges heat with the wall surface forming the first-type flow guide hole 1110 and / or the second-type flow guide hole 1210, while the external environment or external equipment conducts heat through the inner wall forming the first-type flow guide hole 1110 and / or the second-type flow guide hole 1210, thereby achieving heat exchange between the refrigerant and the external environment or external equipment.

[0086] In some embodiments, the first-type flow guide holes 1110 have a different diameter than the second-type flow guide holes 1210; and / or the number of the first-type flow guide holes 1110 and the number of the second-type flow guide holes 1210 are different. Specifically, by varying the diameters and numbers of the first-type flow guide holes 1110 and the second-type flow guide holes 1210, the cross-sectional flow areas of the first and second flow channels can be adjusted relative to each other to accommodate changes in the refrigerant's state during flow through the heat exchange tube 1000, thereby reducing the refrigerant's pressure drop and ensuring heat exchange capacity at various locations within the heat exchange tube 1000.

[0087] The present application does not impose any specific restrictions on the shapes of the flow cross sections of the first type of flow guide holes 1110 and the second type of flow guide holes 1210. Figure 3As shown, the flow cross-sections of the first and second type flow guide holes 1110, 1210 can be square. Depending on actual use requirements, the flow cross-sections of the first and second type flow guide holes 1110, 1210 can also be circular, pentagonal, hexagonal, or waist-shaped, etc., which will not be described in detail here.

[0088] In some embodiments, the heat exchange tube 1000 is configured as a flat tube. Flat tubes are a common structure in the field of heat exchange equipment as a carrier for guiding the flow of heat exchange medium. The specific principles of how the heat exchange medium flows in the flat tubes and completes heat exchange with the outside world are not described in detail in this application.

[0089] According to the second aspect of this application, referring to Figure 1 and Figure 2 As shown, a heat exchanger 100 is provided, which includes the above-mentioned heat exchange tube 1000. The heat exchanger 100 has all the beneficial effects of the above-mentioned heat exchange tube 1000, which will not be repeated here.

[0090] As a specific solution, the heat exchange tube 1000 of the present application can be integrated into the heat exchanger 100, and the type of the heat exchanger 100 and the flow direction of the heat exchange medium can be adaptively adjusted according to different usage scenarios. As an exemplary illustration, the heat exchange tube 1000 can be integrated into the heat exchanger for use, and the heat exchanger 100 can be used as an evaporator on the vehicle 1. In this case, the heat exchange medium can be configured as a refrigerant that can flow on the evaporator and exchange heat with the outside world. The liquid or gas-liquid mixed refrigerant absorbs heat in the evaporator, and thus in the process of flowing through the first flow channel and the second flow channel, the refrigerant gradually vaporizes. After the refrigerant vaporizes, a pressure drop is generated. By configuring the flow capacity of the first flow channel to be less than the flow capacity of the second flow channel, the pressure drop of the refrigerant can be reduced, so that the refrigerant in each place in the heat exchanger 100 has a relatively uniform heat exchange capacity.

[0091] As an example, in one specific embodiment, the first heat exchanger 11 functions as an onboard evaporator, cooling the vehicle cabin, while the second heat exchanger 12 functions as an onboard condenser, heating the cabin. Of course, the above description of the functions of the first and second heat exchangers 11, 12 is merely illustrative; in practice, the first heat exchanger 11 can function as a condenser and the second heat exchanger 12 as an evaporator. Alternatively, both heat exchangers can function simultaneously as cabin heating heat exchangers, working in conjunction with other heat exchangers in the vehicle thermal management system 10.

[0092] In some embodiments, the vehicle thermal management system 10 further includes a first electronic expansion valve 13 . The first electronic expansion valve 13 is disposed between the first heat exchanger 11 and the second heat exchanger 12 . The provision of the first electronic expansion valve 13 ensures that the heat exchange medium can undergo a normal phase change when flowing between the first heat exchanger 11 and the second heat exchanger 12 , thereby achieving a complete heat exchange process using the heat exchange medium.

[0093] In some embodiments, the vehicle thermal management system 10 further includes a compressor 14 . The compressor 14 is configured to drive a heat exchange medium. The compressor 14 is connected to the first heat exchanger 11 and / or the second heat exchanger 12 to deliver the heat exchange medium to the first heat exchanger 11 and / or the second heat exchanger 12 .

[0094] In a specific embodiment, the compressor 14 drives the heat exchange medium so that the heat exchange medium can be used to adjust the operating parameters of the heat exchange medium, such as pressure and temperature. In a more specific embodiment, the refrigerant serving as the heat exchange medium enters the compressor 14 from the inlet, is compressed by the compressor 14, and is discharged from the outlet of the compressor 14.

[0095] In some embodiments, the vehicle thermal management system 10 further includes: an external heat exchanger 15 and a second electronic expansion valve 16. The external heat exchanger 15 is used to exchange heat between the heat exchange medium and the environment outside the vehicle; the second electronic expansion valve 16 is disposed between the external heat exchanger and the first heat exchanger 11; and the compressor 14 is connected to the external heat exchanger 15 to deliver the heat exchange medium to the external heat exchanger 15. In a specific embodiment, the external heat exchanger 15 is, for example, disposed on the vehicle and is used to exchange heat between the heat exchange medium and the ambient gas, thereby cooperating with the first heat exchanger 11 and the second heat exchanger 12 to achieve a cyclic phase change process of the heat exchange medium. The second electronic expansion valve 16 cooperates with the flow path design for the circulation of the heat exchange medium to achieve a phase change of the heat exchange medium.

[0096] In some embodiments, the vehicle thermal management system 10 further includes a switching device. The switching device is used to switch the flow direction of the heat exchange medium within the vehicle thermal management system 10, enabling the vehicle thermal management system 10 to operate in at least a first operating state and a second operating state. Specifically, by configuring multiple heat exchangers and using the switching device to switch the flow direction of the heat exchange medium, the vehicle thermal management system 10 can operate in at least two functional modes, achieving different functions such as cabin cooling and cabin heating.

[0097] In some embodiments, when the vehicle thermal management system 10 is in the first operating state, the first heat exchanger 11 and the second heat exchanger 12 heat the vehicle compartment, and the external heat exchanger 15 cools the environment outside the vehicle. In this mode, the vehicle compartment heating function is achieved.

[0098] In some embodiments, when the vehicle thermal management system 10 is in the second working state, the external heat exchanger 15 releases heat to the outside environment, and the first heat exchanger 11 cools the vehicle compartment. In this mode, the heating function of the vehicle compartment is realized.

[0099] It is understood that the switching device can adopt various specific structural forms based on the function implemented by the switching device. For example, the switching device can be a combination of multiple valves. The following mainly describes some specific implementation methods of the switching device to achieve its function of switching the vehicle thermal management system 10.

[0100] In some embodiments, the switching device includes a heat exchange switching valve 17. The heat exchange switching valve 17 has a first valve port 17a connected to the outlet of the compressor 14, a second valve port 17b connected to the external heat exchanger 15, a third valve port 17c connected to the second heat exchanger 12, and a fourth valve port 17d connected to the inlet of the compressor 14. When the vehicle thermal management system 10 is in the first operating state, the first valve port 17a is connected to the third valve port 17c, and the second valve port 17b is connected to the fourth valve port 17d. The flow direction of the heat exchange medium when the vehicle thermal management system 10 is in the first operating state will be described in detail later.

[0101] In some embodiments, when the vehicle thermal management system 10 is in the second working state, the first valve port 17 a is in communication with the second valve port 17 b , and the third valve port 17 c is in communication with the fourth valve port 17 d .

[0102] In some embodiments, the switching device further includes a one-way valve 18. The one-way valve 18 is disposed between the third valve port 17c and the second heat exchanger 12 to provide one-way flow of the heat exchange medium from the third valve port 17c to the second heat exchanger 12. The one-way valve 18 can be used to prevent the heat exchange medium from flowing toward the third valve port 17c after passing through the second heat exchanger 12, thereby ensuring the correct flow of the heat exchange medium in the corresponding functional mode.

[0103] In some embodiments, the switching device further includes an on-off valve 19. The on-off valve 19 is positioned between the third valve port 17c and the first heat exchanger 11, controlling the connection between the third valve port 17c and the first heat exchanger 11. When the vehicle thermal management system 10 is in the second operating state, the second heat exchanger 12 communicates with the third valve port 17c via the on-off valve 19. The flow of the heat exchange medium when the vehicle thermal management system 10 is in the second operating state will be described in detail later. Specifically, the on-off valve 19 can be, for example, a solenoid valve.

[0104] The following will specifically describe the different functional modes that can be achieved by the vehicle thermal management system 10 .

[0105] Reference Figure 5As shown, the vehicle thermal management system 10 is in a first operating state. After being heated and pressurized by the compressor 14, the heat exchange medium (e.g., refrigerant) flows from the outlet of the compressor 14 to the first valve port 17a. The first valve port 17a of the heat exchange switching valve 17 is connected to the third valve port 17c, and the second valve port 17b is connected to the fourth valve port 17d. The switch valve 19 is in a state that disconnects the pipeline directly connecting the first heat exchanger 11 to the third valve port 17c. As a result, the heat exchange medium flows from the third valve port 17c through the one-way valve 18 and enters the second heat exchanger 12 to release heat. At this time, the second heat exchanger 12 heats the vehicle cabin. The heat exchange medium then enters the first heat exchanger 11 through the first stage of throttling of the electronic expansion valve to release heat again. The first heat exchanger 11 heats the vehicle cabin. The heat exchange medium continues to flow from the first heat exchanger 11 through the second electronic expansion valve 16 after secondary throttling to the external heat exchanger 15. After absorbing heat from the ambient air through the external heat exchanger 15, it flows to the second valve port 17b and flows to the inlet of the compressor 14 from the third valve port 17c.

[0106] For heat exchange between the heat exchange medium and the air, at the first heat exchanger 11 and the second heat exchanger 12, the heat exchange medium first passes through the second flow channel and then through the first flow channel, thereby enhancing heat exchange and reducing pressure drop. The air, driven by a blower coordinated with the vehicle thermal management system 10, is blown from the side of the first heat exchanger 11 near its second flow channel to the side near its second flow channel, then further to the side of the second heat exchanger 12 near its second flow channel, and then to the side of the second heat exchanger 12 near its first flow channel, thereby enhancing heat exchange.

[0107] Reference Figure 6 As shown, the vehicle thermal management system 10 is in its second operating state. After being heated and pressurized by compressor 14, the heat exchange medium (e.g., refrigerant) flows from the outlet of compressor 14 to first valve port 17a. The first valve port 17a of heat exchange switching valve 17 is connected to the second valve port 17b, and the third valve port 17c is connected to the fourth valve port 17d. Switching valve 19 is in a state that connects the pipeline directly connecting first heat exchanger 11 to third valve port 17c. Consequently, the heat exchange medium flows from second valve port 17b to external heat exchanger 15. The heat exchange medium, powered by a cooling fan integrated with the vehicle thermal management system 10, exchanges heat with ambient air at external heat exchanger 15, resulting in cooling and condensation. After that, the heat exchange medium is throttled and reduced in pressure by the second electronic expansion valve 16, enters the first heat exchanger 11 to absorb heat and evaporate to achieve cabin cooling. The one-way valve 18 prevents the heat exchange medium from flowing from the second heat exchanger 12 to the third valve port 17c, so that the heat exchange medium passes through the switch valve 19 and flows to the third valve port 17c, and returns to the inlet of the compressor 14 through the fourth valve port 17d.

[0108] For heat exchange between the heat exchange medium and the air, at the first heat exchanger 11, the heat exchange medium first passes through the first flow channel and then through the second flow channel, thereby enhancing heat exchange and reducing pressure drop. The air is blown from the side of the first heat exchanger 11 near the second flow channel to the side near the second flow channel under the action of a blower coordinated with the vehicle thermal management system 10.

[0109] Of course, the above is only an exemplary description of some functions of the vehicle thermal management system 10. According to different usage requirements, the vehicle thermal management system 10 can integrate more heat exchangers 100 and adaptive pipes and valves to achieve cooling or heating of the engine, battery, motor, etc. of the vehicle 1. This application does not elaborate on this.

[0110] According to the fourth aspect of this application, referring to Figure 7 As shown, a vehicle 1 is provided, which includes the above-mentioned heat exchanger 100, or includes the above-mentioned vehicle thermal management system 10. The vehicle 1 has all the beneficial effects of the above-mentioned heat exchanger 100 or vehicle thermal management system 10, which will not be repeated in this application.

[0111] The vehicle 1 may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0112] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0113] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0115] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A heat exchange tube, characterized in that: The invention comprises a first flow channel and a second flow channel isolated from each other, wherein the first flow channel and the second flow channel have different flow capacities.

2. The heat exchange tube according to claim 1, characterized in that The flow capacity of the first flow channel is smaller than the flow capacity of the second flow channel.

3. The heat exchange tube according to claim 2, characterized in that: A flow cross-sectional area of the first flow channel is smaller than a flow cross-sectional area of the second flow channel.

4. The heat exchange tube according to claim 3, characterized in that A ratio of a flow cross-sectional area of the first flow channel to a flow cross-sectional area of the second flow channel is greater than 1 and less than or equal to 2.

5. The heat exchange tube according to claim 1, characterized in that The heat exchange tube is configured as a flat tube.

6. The heat exchange tube according to any one of claims 1 to 5, characterized in that: The first flow channel is configured as at least one first type flow guide hole formed on the heat exchange tube; and / or, The second flow channel is configured as at least one second type flow guide hole formed on the heat exchange tube.

7. The heat exchange tube according to claim 6, characterized in that The first type of guide holes has a different caliber from the second type of guide holes; and / or, The number of the first type of guide holes and the number of the second type of guide holes are set differently.

8. A heat exchanger, characterized in that: include: The heat exchange tube according to any one of claims 1 to 7.

9. The heat exchanger according to claim 8, characterized in that The heat exchanger includes a plurality of heat exchange tubes; the plurality of heat exchange tubes are spaced apart along a first direction.

10. The heat exchanger according to claim 9, characterized in that Also includes: The heat conductor is arranged between two adjacent heat exchange tubes and is used for conducting heat between the two adjacent heat exchange tubes.

11. The heat exchanger according to claim 9, characterized in that Also includes: A manifold is connected to at least one of the first flow channel and the second flow channel to allow heat exchange medium to flow into or out of the first flow channel / the second flow channel.

12. The heat exchanger according to claim 11, characterized in that The collecting pipe comprises: The first manifold is connected to one end of the first flow channel to allow heat exchange medium to flow into or out of the first flow channel. a second manifold connected to one end of the second flow channel to allow the heat exchange medium to flow into or out of the second flow channel; The first header and the second header are connected to each other so that the heat exchange medium flows between the first flow channel and the second flow channel.

13. The heat exchanger according to claim 12, characterized in that The collecting pipe further comprises: a third manifold connected to the other end of the first flow channel to allow the heat exchange medium to flow into or out of the first flow channel; a fourth manifold connected to the other end of the second flow channel to allow the heat exchange medium to flow into or out of the second flow channel; The third header is connected to the first header through the first flow channel; the fourth header is connected to the second header through the second flow channel.

14. The heat exchanger according to claim 13, characterized in that The third header and the fourth header are arranged at the same end of the extension direction of the plurality of heat exchange tubes.

15. The heat exchanger according to claim 14, characterized in that Also includes: In a heat exchange flow path formed by the third header, the first flow channel, the first header, the second header, the second flow channel, and the fourth header for the heat exchange working medium to flow, one of the third header and the fourth header is provided with a working medium inlet for the heat exchange working medium to flow into the heat exchange flow path, and the other of the third header and the fourth header is provided with a working medium outlet for the heat exchange working medium to flow out of the heat exchange flow path; Wherein, the working medium outlet and the working medium inlet are located at the same end of the heat exchange tube along the first direction.

16. A vehicle thermal management system, characterized in that: include: A heat exchanger according to any one of claims 8 to 15.

17. The vehicle thermal management system according to claim 16, characterized in that: The thermal management system includes a plurality of heat exchangers; the plurality of heat exchangers include a first heat exchanger and a second heat exchanger; The first port of the first heat exchanger for the heat exchange medium to flow in or out is connected to the second port of the second heat exchanger for the heat exchange medium to flow in or out.

18. The vehicle thermal management system according to claim 17, characterized in that: Also includes: The first electronic expansion valve is arranged between the first heat exchanger and the second heat exchanger.

19. The vehicle thermal management system according to claim 17, wherein: Also includes: A compressor, used to drive the heat exchange medium; The compressor is connected to the first heat exchanger and / or the second heat exchanger to deliver the heat exchange medium to the first heat exchanger and / or the second heat exchanger.

20. The vehicle thermal management system according to claim 19, wherein: Also includes: An external heat exchanger, used for exchanging heat between the heat exchange medium and the environment outside the vehicle; a second electronic expansion valve, disposed between the external heat exchanger and the first heat exchanger; Wherein, the compressor is connected to the external heat exchanger to deliver the heat exchange medium to the external heat exchanger.

21. The vehicle thermal management system according to claim 20, characterized in that: Also includes: The switching device is used to switch the flow direction of the heat exchange medium in the vehicle thermal management system so that the vehicle thermal management system has at least a first working state and a second working state.

22. The vehicle thermal management system according to claim 21, characterized in that: When the vehicle thermal management system is in the first working state, the first heat exchanger and the second heat exchanger heat the vehicle compartment, and the external heat exchanger cools the environment outside the vehicle.

23. The vehicle thermal management system according to claim 21, characterized in that: When the vehicle thermal management system is in the second working state, the external heat exchanger releases heat to the outside environment, and the first heat exchanger cools the vehicle cabin.

24. The vehicle thermal management system according to claim 21, wherein: The switching device comprises: a heat exchange switching valve having a first valve port communicating with the outlet of the compressor, a second valve port communicating with the external heat exchanger, a third valve port communicating with the second heat exchanger, and a fourth valve port communicating with the inlet of the compressor; Wherein, when the vehicle thermal management system is in the first working state, the first valve port is communicated with the third valve port, and the second valve port is communicated with the fourth valve port.

25. The vehicle thermal management system according to claim 24, characterized in that: When the vehicle thermal management system is in the second working state, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port.

26. The vehicle thermal management system according to claim 25, characterized in that: The switching device further includes: A one-way valve is provided between the third valve port and the second heat exchanger to realize one-way passage of the heat exchange medium from the third valve port to the second heat exchanger.

27. The vehicle thermal management system according to claim 26, characterized in that: The switching device further includes: an on-off valve, disposed between the third valve port and the first heat exchanger, for controlling the on-off of the third valve port and the first heat exchanger; When the vehicle thermal management system is in the second working state, the second heat exchanger is connected to the third valve port through the switching valve.

28. A vehicle, characterized in that: The heat exchange tube according to any one of claims 1 to 7, or the heat exchanger according to any one of claims 8 to 15, or the vehicle thermal management system according to any one of claims 16 to 27.

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