Heat exchanger and integrated assembly

Abstract

The heat exchanger is provided with a low-pressure flow channel and a high-pressure flow channel which do not communicate with each other, the low-pressure flow channel comprises a first branch flow channel, a second branch flow channel and a third branch flow channel, and one end of the first branch flow channel, one end of the second branch flow channel and one end of the third branch flow channel communicate with each other to form a confluence area; the low-pressure flow channel comprises a first low-pressure inlet, a second low-pressure inlet and a low-pressure outlet, the first low-pressure inlet, the second low-pressure inlet and the low-pressure outlet are communicated with the other ends of the first branch flow channel, the second branch flow channel and the third branch flow channel respectively, and at least one of the first branch flow channel and the second branch flow channel comprises a flow blocking flow channel section. When the flow blocking flow channel section is applied to the heat management system, the problem that refrigerants flow backwards in the heat management system can be solved, and the operation efficiency of the heat management system can be improved.

Description

Technical Field

[0001] This application relates to the field of heat exchange equipment technology, and in particular to a vehicle heat exchanger and integrated components. Background Technology

[0002] In some thermal management systems, the high-pressure and low-pressure refrigerants exchange heat through a heat exchanger to increase the refrigerant dryness or superheat at the compressor inlet, thereby reducing compressor liquid slugging. The two inlets of the low-pressure side flow channel of the heat exchanger are connected to the outlets of two evaporators. When one evaporator is operating while the other is not, the refrigerant flowing from the operating evaporator into the low-pressure side flow channel can backflow into the non-operating evaporator, reducing the amount of refrigerant circulating in the thermal management system and affecting its operating efficiency. Utility Model Content

[0003] To solve the aforementioned refrigerant backflow problem, this application provides the following technical solution:

[0004] A heat exchanger has a low-pressure flow channel and a high-pressure flow channel that are not interconnected. The low-pressure flow channel includes a first branch flow channel, a second branch flow channel, and a third branch flow channel. One end of the first branch flow channel, the second branch flow channel, and the third branch flow channel are interconnected to form a confluence zone. The low-pressure flow channel includes a first low-pressure inlet, a second low-pressure inlet, and a low-pressure outlet. The first low-pressure inlet, the second low-pressure inlet, and the low-pressure outlet are respectively connected to the other end of the first branch flow channel, the second branch flow channel, and the third branch flow channel. At least one of the first branch flow channel and the second branch flow channel includes a flow-blocking section. Along the direction of gravity, the flow-blocking section is higher than the confluence zone.

[0005] The heat exchanger provided by this technical solution includes at least one of the first branch flow channel and the second branch flow channel, which is a flow-blocking section. Along the direction of gravity, the flow-blocking section is higher than the confluence zone, making it difficult for the medium flowing in from the first low-pressure inlet to flow through the flow-blocking section to the second low-pressure inlet when passing through the confluence zone, and / or difficult for the medium flowing in from the second low-pressure inlet to flow through the flow-blocking section to the first low-pressure inlet when passing through the confluence zone. When applied in a thermal management system, this can reduce the refrigerant backflow problem in the thermal management system and help improve the operating efficiency of the thermal management system.

[0006] An integrated component is applied to a thermal management system, the thermal management system including a first valve, a second valve, a first evaporator, a second evaporator, and a compressor. The integrated component includes a liquid receiver, a valve island, and the aforementioned heat exchanger. The valve island is equipped with a control valve, at least one of the first valve and the second valve. The outlet of the first evaporator is connected to a first low-pressure inlet of the heat exchanger, the outlet of the second evaporator is connected to a second low-pressure inlet of the heat exchanger, the inlet of the compressor is connected to a low-pressure outlet of the heat exchanger, the outlet of the liquid receiver is connected to a high-pressure inlet of a high-pressure flow channel of the heat exchanger, and the inlets of the first valve and the second valve are connected to a high-pressure outlet of the high-pressure flow channel of the heat exchanger.

[0007] The integrated component provided by this technical solution includes the aforementioned heat exchanger. At least one of the first branch flow channel and the second branch flow channel of the heat exchanger includes a flow-blocking section. Along the direction of gravity, the flow-blocking section is higher than the confluence zone, making it difficult for refrigerant flowing from the second evaporator into the heat exchanger to flow to the first evaporator through the flow-blocking section when passing through the confluence zone and / or for refrigerant flowing from the first evaporator into the heat exchanger to flow to the second evaporator through the flow-blocking section when passing through the confluence zone. Therefore, it can reduce the refrigerant backflow problem in the thermal management system and is beneficial to improving the operating efficiency of the thermal management system. Attached Figure Description

[0008] Figure 1 A three-dimensional structural schematic diagram of the first embodiment of the heat exchanger provided in this application;

[0009] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure from another perspective;

[0010] Figure 3 for Figure 2 A three-dimensional structural diagram in its disassembled state;

[0011] Figure 4 for Figure 3 A schematic diagram of the low-pressure flow channel side of the central flow channel plate;

[0012] Figure 5 for Figure 4 A partial sectional view of the structure;

[0013] Figure 6 This is a schematic diagram of the low-pressure flow channel side of the second embodiment of the flow channel plate;

[0014] Figure 7 This is a schematic diagram of the low-pressure flow channel side of the third embodiment of the flow channel plate;

[0015] Figure 8 This is a schematic diagram of the low-pressure flow channel side of the fourth embodiment of the flow channel plate;

[0016] Figure 9 This is a schematic diagram of the low-pressure flow channel side of the fifth embodiment of the flow channel plate;

[0017] Figure 10 This is a three-dimensional structural diagram of the low-pressure flow channel side of the sixth embodiment of the flow channel plate;

[0018] Figure 11 for Figure 10 A three-dimensional structural diagram from another perspective;

[0019] Figure 12 This is a three-dimensional structural diagram of the low-pressure flow channel side of the seventh embodiment of the flow channel plate;

[0020] Figure 13 for Figure 12 A sectional view.

[0021] The annotations in the attached figures are explained as follows:

[0022] 100. Matrix;

[0023] A. Low-pressure flow channel; A1. First branch flow channel; A2. Second branch flow channel; A3. Third branch flow channel; B. High-pressure flow channel; C. Confluence area; X1. First low-pressure inlet; X2. Second low-pressure inlet; X3. Low-pressure outlet; Y1. High-pressure inlet; Y2. High-pressure outlet;

[0024] 11. Flow channel plate; 111. Low-pressure flow channel groove; 111a. First groove; 111b. Second groove; 111c. Third groove; 112. High-pressure flow channel groove; 113. Guide vane; 113a. Curved guide vane; 113b. Straight guide vane; 114. Low-pressure flow channel aperture; 114a. First low-pressure flow channel aperture; 114b. Second low-pressure flow channel aperture; 114c. Third low-pressure flow channel aperture; 115. Guide radius;

[0025] 12. Low-pressure side cover plate; 13. High-pressure side cover plate;

[0026] 200. Connection unit;

[0027] 21. Low-pressure connector; 22. High-pressure connector; 221. First high-pressure connector; 222. Second high-pressure connector. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The heat exchanger provided in this application has a low-pressure flow channel A and a high-pressure flow channel B that are not interconnected. For example... Figures 1-5As shown, in this embodiment, the heat exchanger includes a base 100, which includes a flow channel plate 11, a low-pressure side cover plate 12, and a high-pressure side cover plate 13. Low-pressure flow channel grooves 111 and high-pressure flow channel grooves 112 are formed on both sides of the flow channel plate 11 in the thickness direction. The low-pressure flow channel groove 111 includes a first groove 111a, a second groove 111b, and a third groove 111c. The low-pressure flow channel grooves 111 and 112 are separated by the body of the flow channel plate 11. The low-pressure side cover plate 12 and the high-pressure side cover plate 13 are respectively assembled and fixed on both sides of the flow channel plate 11 in the thickness direction. The high-pressure side cover plate 13 covers at least a portion of the opening of the high-pressure flow channel groove 112, forming a partial high-pressure flow channel B. The low-pressure side cover plate 12 covers at least a portion of the opening of the low-pressure flow channel groove 111, forming a partial low-pressure flow channel A. The flow channel plate 11 is provided with low-pressure flow channel holes 114, and the holes in the low-pressure flow channel holes 114 form a portion of low-pressure flow channel A. The low-pressure flow channel holes 114 include a first low-pressure flow channel hole 114a, a second low-pressure flow channel hole 114b, and a third low-pressure flow channel hole 114c. In other embodiments, the substrate 100 may also be a one-piece structure, with the low-pressure flow channel A and the high-pressure flow channel B formed by machining, casting, or other methods.

[0030] The low-pressure flow channel A includes a first branch flow channel A1, a second branch flow channel A2, and a third branch flow channel A3. One end of each of the three branches is interconnected to form a confluence area C. The low-pressure flow channel A includes a first low-pressure inlet X1, a second low-pressure inlet X2, and a low-pressure outlet X3. The first low-pressure inlet X1 is connected to the other end of the first branch flow channel A1, the second low-pressure inlet X2 is connected to the other end of the second branch flow channel A2, and the low-pressure outlet X3 is connected to the other end of the third branch flow channel A3. At least one of the first branch flow channels A1 and the second branch flow channel A2 includes a flow-blocking section Z, which is higher than the confluence area C along the direction of gravity G. In use, the direction of gravity is vertically downwards. Since at least one of the first branch channel A1 and the second branch channel A2 of the heat exchanger includes a flow-blocking section Z, and the flow-blocking section Z is higher than the confluence zone C along the direction of gravity, the medium flowing in from the first low-pressure inlet X1 connected to one end of the first branch channel A1 has difficulty flowing through the flow-blocking section Z to the second low-pressure inlet X2 connected to one end of the second branch channel A2 when passing through the confluence zone C, and the medium flowing in from the second low-pressure inlet X2 connected to one end of the second branch channel A2 has difficulty flowing through the flow-blocking section Z to the first low-pressure inlet X1 connected to one end of the first branch channel A1 when passing through the confluence zone C.

[0031] When the heat exchanger is used in a thermal management system, the first low-pressure inlet X1 connected to one end of the first branch channel A1 and the second low-pressure inlet X2 connected to one end of the second branch channel A2 can be connected to the outlet of the first evaporator and the outlet of the second evaporator of the thermal management system, respectively. This makes it difficult for the refrigerant flowing from the second evaporator into the heat exchanger to flow to the first evaporator through the obstruction channel section Z when passing through the confluence zone C, and / or for the refrigerant flowing from the first evaporator into the heat exchanger to flow to the second evaporator through the obstruction channel section Z when passing through the confluence zone C. Therefore, it can reduce the refrigerant backflow problem in the thermal management system and help improve the operating efficiency of the thermal management system.

[0032] In some embodiments, the heat exchanger has a first operating state and a second operating state. In the first operating state, the medium flows into the low-pressure flow channel A from the first low-pressure inlet X1, and the flow resistance of the third branch flow channel A3 of the low-pressure flow channel A is less than the flow resistance of the second branch flow channel A2. In the second operating state, the medium flows into the low-pressure flow channel A from the second low-pressure inlet X2, and the flow resistance of the third branch flow channel A3 of the low-pressure flow channel A is less than the flow resistance of the first branch flow channel A1.

[0033] When the medium flows into the low-pressure channel A of the heat exchanger from the first low-pressure inlet X1, the flow resistance of the third branch channel A3 of the low-pressure channel A is less than that of the second branch channel A2. This makes it difficult for the medium flowing in from the first low-pressure inlet X1 to flow through the second branch channel A2 to the second low-pressure inlet X2 connected to one end of the second branch channel A2 after passing through the confluence area C. Instead, it mainly flows through the third branch channel A3 to the low-pressure outlet X3 connected to one end of the third branch channel A3. When the medium flows into the low-pressure channel A of the heat exchanger from the second low-pressure inlet X2, the flow resistance of the third branch channel A3 of the low-pressure channel A is less than that of the first branch channel A1. This makes it difficult for the medium flowing in from the second low-pressure inlet X2 to flow through the first branch channel A1 to the first low-pressure inlet X1 connected to one end of the first branch channel A1 after passing through the confluence area C. Instead, it mainly flows through the third branch channel A3 to the low-pressure outlet X3 connected to one end of the third branch channel A3. Therefore, the heat exchanger can reduce refrigerant backflow problems in both the first and second operating states.

[0034] In some embodiments, such as Figure 4 As shown, along the direction of gravity, the first low-pressure inlet X1 is higher than the manifold C, and the second low-pressure inlet X2 is higher than the manifold C. This creates a height difference between the two inlets and the return flow area C in the direction of gravity. This makes it difficult for the medium flowing in from the second low-pressure inlet X2 to flow to the first low-pressure inlet X1 after passing through the manifold C, and difficult for the medium flowing in from the first low-pressure inlet X1 to flow to the second low-pressure inlet X2 after passing through the manifold C. Therefore, it is more conducive to reducing the problem of refrigerant backflow.

[0035] In some embodiments, along the direction of gravity, the end of the third branch channel A3 near the confluence region C is lower than or flush with the confluence region C, for example... Figure 4 In the middle, the end of the third branch channel A3 near the confluence zone C is lower than the confluence zone C. For example... Figure 7 In this design, the third branch channel A3 is flush with the end of the confluence zone C. Furthermore, along the direction of gravity, the low-pressure outlet X3 is lower than the confluence zone C, and the third branch channel A3 smoothly transitions from the confluence zone C to the low-pressure outlet X3. This design reduces the resistance to the flow of the medium from the confluence zone C to the low-pressure outlet X3. Therefore, the medium flowing in from the first low-pressure inlet X1 or the second low-pressure inlet X2 is more likely to flow to the low-pressure outlet X3 via the third branch channel A3 after passing through the confluence zone C, rather than flowing to the second low-pressure inlet X2 via the second branch channel A2 or to the first low-pressure inlet X1 via the first branch channel A1. This design helps to reduce refrigerant backflow.

[0036] In some embodiments, the low-pressure flow channel A includes a vertical direct current channel section. The first branch flow channel A1 and / or the second branch flow channel A2 includes a horizontal flow channel section. The horizontal flow channel section extends substantially perpendicular to the direction of gravity. The vertical direct current channel section extends substantially parallel to the direction of gravity. One end of the horizontal flow channel section communicates with the first low-pressure inlet X1 or the second low-pressure inlet X2; more specifically, one end of the horizontal flow channel section of the first branch flow channel A1 communicates with the first low-pressure inlet X1, and one end of the horizontal flow channel section of the second branch flow channel A2 communicates with the second low-pressure inlet X2. The other end of the horizontal flow channel section communicates with the vertical direct current channel section. For example, Figure 4 In this configuration, the second groove 111b extends vertically, forming a vertical straight channel section of the low-pressure flow channel A with the low-pressure side cover plate 12. The second low-pressure flow channel hole 114b extends horizontally, forming a horizontal flow channel section of the second branch flow channel A2. One end of the second low-pressure flow channel hole 114b communicates with the second low-pressure inlet X2, and the other end communicates with the second groove 111b. For example... Figure 10 and Figure 11 In this configuration, the second low-pressure flow channel orifice 114b extends horizontally, forming a horizontal flow channel segment of the second branch flow channel A2. The first low-pressure flow channel orifice 114a extends horizontally, forming a horizontal flow channel segment of the first branch flow channel A1. For example... Figure 12 and Figure 13 In the middle, the second low-pressure flow channel hole 114b extends horizontally and forms a horizontal flow channel section of the second branch flow channel A2. The first low-pressure flow channel hole 114a extends horizontally and forms a horizontal flow channel section of the first branch flow channel A1.

[0037] Low-pressure flow channel A includes a vertical direct flow section. The first branch flow channel A1 and / or the second branch flow channel A2 include horizontal flow sections. One end of the horizontal flow section is connected to the first low-pressure inlet X1 or the second low-pressure inlet X2, and the other end is connected to the vertical direct flow section. With this design, the medium flowing in from one low-pressure inlet needs to make at least two 90-degree bends to flow to the other low-pressure inlet. The high flow resistance at the bends makes it more difficult for the medium flowing in from one low-pressure inlet to flow to the other, thus reducing the problem of refrigerant backflow.

[0038] In some embodiments, the connection points between the horizontal flow channel sections and the vertical flow channel sections of the first branch flow channel A1 and / or the second branch flow channel A2 are smoothly transitioned by guide fillets. For example Figure 4 and Figure 5 In the middle, the second low-pressure flow channel hole 114b forms a horizontal flow channel section of the second branch flow channel A2. The second low-pressure flow channel hole 114b and the vertical second groove 111b are smoothly transitioned by the flow guide fillet 115. Specifically, the flow guide fillet 115 can be milled on the side wall of the second groove 111b using a ball end mill.

[0039] The connection points between the horizontal flow channel section and the vertical direct flow channel section of the first branch flow channel A1 and / or the second branch flow channel A2 are smoothly transitioned by guide fillets. This avoids excessive resistance at the connection points between the horizontal flow channel section and the vertical direct flow channel section of the first branch flow channel A1 and / or the second branch flow channel A2. If the resistance is too high, the medium flowing in from the low-pressure inlet (including the first low-pressure inlet X1 and the second low-pressure inlet X2) will require a large amount of power to be discharged from the low-pressure outlet X3, resulting in higher operating costs.

[0040] In some embodiments, the first low-pressure inlet X1 and the second low-pressure inlet X2 are located on different sides of the flow channel plate 11, such that the horizontal flow channel section of the first branch flow channel A1 and the horizontal flow channel section of the second branch flow channel A2 are perpendicular. For example, as shown in 10, the first low-pressure inlet X1 is located on one side in the width direction of the flow channel plate 11, and the second low-pressure inlet X2 is located on one side in the thickness direction of the flow channel plate 11. The horizontal flow channel section of the first branch flow channel A1 (first low-pressure flow channel hole 114a in the figure) and the horizontal flow channel section of the second branch flow channel A2 (second low-pressure flow channel hole 114b in the figure) are perpendicular.

[0041] In some embodiments, the first low-pressure inlet X1 and the second low-pressure inlet X2 are located on the same side of the flow channel plate 11, such that the horizontal flow channel section of the first branch flow channel A1 and the horizontal flow channel section of the second branch flow channel A2 are parallel to each other. For example Figure 12As shown, the first low-pressure inlet X1 and the second low-pressure inlet X2 are both located on the same side of the length direction of the flow channel plate 11. The horizontal flow channel section of the first branch flow channel A1 (the first low-pressure flow channel hole 114a in the figure) and the horizontal flow channel section of the second branch flow channel A2 (the second low-pressure flow channel hole 114b in the figure) are parallel.

[0042] In some embodiments, the low-pressure flow channel A includes a bend in the flow channel, and a guide vane 113 is provided within at least the bend in the flow channel A. A guide vane 113 may also be provided within the straight flow channel of the low-pressure flow channel A; the straight flow channel can be a horizontal flow channel, a vertical straight flow channel, or an inclined flow channel. For a low-pressure flow channel A including a low-pressure flow channel groove 111, the guide vane 113 can be disposed within the low-pressure flow channel groove 111. The width of the guide vane 113 can be less than or equal to the depth of the low-pressure flow channel groove 111, and the guide vane 113 can extend along the centerline of the low-pressure flow channel groove 111. For example... Figure 4 As shown, each of the two curved sections of the low-pressure flow channel groove 111 is provided with a curved guide vane 113a, and a straight guide vane 113b is provided in one straight section. The straight guide vane 111b is connected to a curved guide vane 113a to form a combined guide vane 113c. In actual implementation, the guide vane 113 can be omitted, or the position of the guide vane 113 and the connection method between the guide vanes 113 can be selected according to actual needs.

[0043] Specifically, the shape of the low-pressure flow channel A is designed based on the principles of increasing the flow resistance of the medium from the confluence area C to the first low-pressure inlet X1 and the second low-pressure inlet X2, reducing the flow resistance of the medium from the confluence area C to the low-pressure outlet X3, and ensuring that the length of the low-pressure flow channel A is sufficient. To ensure that the length of the low-pressure flow channel A is sufficient, the third branch flow channel A3 can be designed as a serpentine flow channel. Specifically, the multiple parallel flow channel segments of the serpentine third branch flow channel A3 can be arranged sequentially in the vertical direction (e.g., Figure 7 As shown), they can also be arranged sequentially along the horizontal direction (e.g. Figure 12 (As shown).

[0044] Specifically, Figure 4In the illustrated embodiment, the low-pressure flow channel A has the following shape: The first groove 111a includes a vertical groove segment, a horizontal straight groove segment, and a curved groove segment. The upper end of the vertical groove segment communicates with the lower end of the first low-pressure flow channel aperture 114a. The lower end of the vertical groove segment communicates with the left end of the horizontal straight groove segment via the curved groove segment. The right end of the horizontal straight groove segment communicates with the confluence region C. The second groove 111b includes a vertical groove segment. The upper end of the vertical groove segment communicates with one end of the second low-pressure flow channel aperture 114b. The lower end of the vertical groove segment communicates with the confluence region C. The third groove 111c includes two vertical groove sections, one horizontal straight groove section, one inclined straight groove section, and three curved groove sections. The upper end of the first vertical groove section is connected to the confluence area C, the lower end of the first vertical groove section is connected to the lower end of the inclined straight groove section through the first curved groove section, the upper end of the inclined straight groove section is connected to the upper end of the second vertical groove section through the second curved groove section, the lower end of the second vertical groove section is connected to the left end of the horizontal straight groove section, and the right end of the horizontal straight groove section is connected to the left end of the outlet orifice 114c.

[0045] Specifically, Figure 6 In the illustrated embodiment, the low-pressure flow channel A has the following shape: the first groove 111a includes a vertical groove segment, the upper end of which communicates with the lower end of the first low-pressure flow channel orifice 114a, and the lower end of which communicates with the confluence area C; the second groove 111b includes a vertical groove segment, a horizontal straight groove segment, and a curved groove segment, wherein the upper end of the vertical groove segment communicates with one end of the second low-pressure flow channel orifice 114b, and the lower end of the vertical groove segment communicates with the right end of the horizontal straight groove segment via the curved groove segment, and the lower end of the horizontal straight groove segment communicates with the right end of the horizontal straight groove segment via the curved groove segment. The left end of the groove segment is connected to the confluence area C; the third groove 111c includes three horizontal straight groove segments and three curved groove segments, wherein the left end of the first horizontal straight groove segment is connected to the upper confluence area C through the first curved groove segment, the right end of the first horizontal straight groove segment is connected to the right end of the lower second horizontal straight groove segment through the second curved groove segment, the left end of the second horizontal straight groove segment is connected to the left end of the lower third horizontal straight groove segment through the third curved groove segment, and the right end of the third horizontal straight groove segment is connected to the left end of the outlet hole 114c.

[0046] Specifically, Figure 7In the illustrated embodiment, the low-pressure flow channel A has the following shape: The first groove 111a includes a vertical straight groove section, a curved groove section, and a horizontal straight groove section. The upper end of the vertical straight groove section communicates with the first low-pressure flow channel hole 114a, the lower end of the vertical straight groove section communicates with the left end of the horizontal straight groove section via the curved groove section, and the right end of the horizontal straight groove section communicates with the confluence area C. The second groove 111b includes a vertical straight groove section, the upper end of which communicates with one end of the second low-pressure flow channel hole 114b, and the lower end of which communicates with the confluence area C. The third groove 111c includes six horizontal straight groove sections and six curved groove sections. The right end of the first horizontal straight groove section... The first curved groove section is connected to the upper confluence area C. The left end of the first horizontal straight groove section is connected to the left end of the lower second horizontal straight groove section via the second curved groove section. The right end of the second horizontal straight groove section is connected to the right end of the lower third horizontal straight groove section via the third curved groove section. The left end of the third horizontal straight groove section is connected to the right end of the fourth horizontal straight groove section via the fourth curved groove section. The left end of the fourth horizontal straight groove section is connected to the left end of the lower fifth horizontal straight groove section via the fifth curved groove section. The right end of the fifth horizontal straight groove section is connected to the left end of the lower sixth horizontal straight groove section via the sixth curved groove section. The right end of the sixth horizontal straight groove section is connected to the left end of the outlet orifice 114c.

[0047] Specifically, Figure 8 In the illustrated embodiment, the low-pressure flow channel A has the following shape: the first groove 111a includes a vertical straight groove section, the upper end of which is connected to the lower end of the first low-pressure flow channel orifice 114a, and the lower end of which is connected to the confluence zone C; the second groove 111b includes a vertical straight groove section and a curved groove section, the upper end of which is connected to one end of the second low-pressure flow channel orifice 114b, and the lower end of which is connected to the confluence zone C via the curved groove section; the third groove 111c includes a vertical straight groove section, a curved groove section, and a horizontal straight groove section, the upper end of which is connected to the confluence zone C, the lower end of which is connected to the left end of the horizontal straight groove section via the curved groove section, and the right end of the horizontal straight groove section is connected to the left end of the outlet orifice 114c.

[0048] Specifically, Figure 9 In the embodiment shown, the shape of the low-pressure flow channel A is similar to... Figure 8 The difference is that the curved groove section of the second groove 111b has a greater curvature, roughly forming a U-shape.

[0049] Specifically, Figure 10 and Figure 11 In the embodiment shown, the shape of the low-pressure flow channel A is similar to... Figure 9The difference is that there is no first groove 111a. The first branch flow channel A1 is formed by the first low-pressure flow channel hole 114a. The first branch flow channel A1 extends in the horizontal direction and is at the same height as the confluence area C.

[0050] Specifically, Figure 12 and Figure 13 In the illustrated embodiment, the low-pressure flow channel A has the following shape: the first groove 111a includes a horizontal straight groove section, the left end of which is connected to the right end of the first low-pressure flow channel orifice 114a, and the right end of which is connected to the confluence zone C; the second groove 111b includes a horizontal straight groove section, a curved groove section, and a vertical straight groove section, the left end of which is connected to the right end of the second low-pressure flow channel orifice 114b, one end of which is connected to the upper end of the vertical straight groove section via the curved groove section, and the lower end of which is connected to the confluence zone C; the third groove 111c includes two vertical straight groove sections and two curved groove sections, the upper end of which is connected to the confluence zone C, the lower end of which is connected to the upper end of the second vertical straight groove section via a generally S-shaped curved groove section, and the lower end of which is connected to the left end of the outlet orifice 114c via another curved groove section.

[0051] The high-pressure flow channel B of the heat exchanger has a high-pressure inlet Y1 and a high-pressure outlet Y2 at its two ends. During operation, the medium enters the high-pressure flow channel B through the high-pressure inlet Y1 and exits from the high-pressure outlet Y2. The low-pressure flow channel A and the high-pressure flow channel B are separated by the body of the flow channel plate 11, and they exchange heat through the body of the flow channel plate 11. That is, the medium in the high-pressure flow channel B and the medium in the low-pressure flow channel A exchange heat through the body of the flow channel plate 11. For example... Figure 3 In the embodiment shown, the high-pressure side cover plate 13 is provided with two through holes, which are respectively connected to the two ends of the high-pressure flow channel groove 112, thereby forming a high-pressure inlet Y1 and a high-pressure outlet Y2.

[0052] In some embodiments, the heat exchanger includes a connection unit 200, which is fixedly or partially connected to the base 100. The connection unit 200 is used to connect external components other than the heat exchanger. The connection unit 200 includes a low-pressure connector 21 and a high-pressure connector 22. The channel of the low-pressure connector 21 can connect the inlet of the low-pressure flow channel A to the outlet of the external component, or connect the outlet of the low-pressure flow channel A to the inlet of the external component. The channel of the high-pressure connector 22 can connect the inlet of the high-pressure flow channel B to the outlet of the external component, or connect the outlet of the high-pressure flow channel B to the inlet of the external component. For example... Figure 2 and Figure 3In the illustrated embodiment, a low-pressure connector 21 and two high-pressure connectors 22 are provided. One end of the low-pressure connector 21 is welded and fixed to the flow channel plate 11, specifically by laser welding or friction stir welding. The other end of the low-pressure connector 21 can be connected to an evaporator of the thermal management system. The two high-pressure connectors 22 are a first high-pressure connector 221 and a second high-pressure connector 222. One end of the first high-pressure connector 221 is welded to the high-pressure inlet Y1 of the high-pressure side cover plate 13, and the second high-pressure connector is welded to the high-pressure outlet Y2 of the high-pressure side cover plate 13. The welding method can specifically be laser welding or friction stir welding.

[0053] This application also provides an integrated assembly including a liquid receiver, a valve island, and the aforementioned heat exchanger. This integrated assembly is applied to a thermal management system, which includes a first valve, a second valve, a first evaporator, a second evaporator, and a compressor. The valve island is equipped with at least one of a control valve, the first valve, and the second valve. The outlet of the first evaporator is connected to the first low-pressure inlet X1 of the heat exchanger; the outlet of the second evaporator is connected to the second low-pressure inlet X2 of the heat exchanger; the inlet of the compressor is connected to the low-pressure outlet X3 of the heat exchanger; the outlet of the liquid receiver is connected to the high-pressure inlet Y1 of the high-pressure flow channel B; and the inlets of the first and second valves are connected to the high-pressure outlet Y2 of the high-pressure flow channel B. Since at least one of the first branch flow channel A1 and the second branch flow channel A2 of the heat exchanger includes a flow-blocking section Z, and the flow-blocking section Z is higher than the confluence zone C along the direction of gravity, it is difficult for the medium flowing in from the first low-pressure inlet X1 to flow through the flow-blocking section Z to the second low-pressure inlet X2 when passing through the confluence zone, and / or it is difficult for the medium flowing in from the second low-pressure inlet X2 to flow through the flow-blocking section Z to the first low-pressure inlet X1 when passing through the confluence zone. Therefore, it is difficult for the refrigerant flowing into the heat exchanger from the second evaporator to flow through the flow-blocking section Z to the first evaporator when passing through the confluence zone C, and / or it is difficult for the refrigerant flowing into the heat exchanger from the first evaporator to flow through the flow-blocking section Z to the second evaporator when passing through the confluence zone C. Therefore, the refrigerant backflow problem in the thermal management system can be reduced, which is beneficial to improving the operating efficiency of the thermal management system.

[0054] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A heat exchanger, characterized by, The heat exchanger has a low-pressure flow channel (A) and a high-pressure flow channel (B) which are not communicated with each other, the low-pressure flow channel (A) comprises a first branch flow channel (A1), a second branch flow channel (A2) and a third branch flow channel (A3), one end of the first branch flow channel (A1), the second branch flow channel (A2) and the third branch flow channel (A3) are communicated with each other to form a confluence area (C), the low-pressure flow channel (A) comprises a first low-pressure inlet (X1), a second low-pressure inlet (X2) and a low-pressure outlet (X3), the first low-pressure inlet (X1), the second low-pressure inlet (X2) and the low-pressure outlet (X3) are respectively communicated with the other end of the first branch flow channel (A1), the second branch flow channel (A2) and the third branch flow channel (A3), at least one of the first branch flow channel (A1) and the second branch flow channel (A2) comprises a resistance flow channel section (Z), along the gravity direction, the resistance flow channel section (Z) is higher than the confluence area (C).

2. The heat exchanger of claim 1, wherein The heat exchanger has a first working state and a second working state; In the first working state, the medium enters the low-pressure flow channel (A) from the first low-pressure inlet (X1), the flow resistance of the third branch flow channel (A3) is smaller than that of the second branch flow channel (A2); In the second working state, the medium enters the low-pressure flow channel (A) from the second low-pressure inlet (X2), the flow resistance of the third branch flow channel (A3) is smaller than that of the first branch flow channel (A1).

3. The heat exchanger according to claim 1 or 2, characterized in that Along the gravity direction, the first low-pressure inlet (X1) and the second low-pressure inlet (X2) are higher than the confluence area (C).

4. The heat exchanger of claim 3, wherein Along the gravity direction, one end of the third branch flow channel (A3) close to the confluence area (C) is lower than or flush with the confluence area (C), the low-pressure outlet (X3) is located below the confluence area (C), and the third branch flow channel (A3) smoothly transitions from the confluence area (C) to the low-pressure outlet (X3).

5. The heat exchanger of claim 4, wherein The low-pressure flow channel (A) comprises a vertical flow channel section, the first branch flow channel (A1) and / or the second branch flow channel (A2) comprises a horizontal flow channel section, one end of the horizontal flow channel section is communicated with the first low-pressure inlet (X1) or the second low-pressure inlet (X2), and the other end of the horizontal flow channel section is communicated with the vertical flow channel section.

6. The heat exchanger of claim 5, wherein The heat exchanger comprises a flow channel plate (11), the first low-pressure inlet (X1) and the second low-pressure inlet (X2) are located on the same side of the flow channel plate (11), so that the horizontal flow channel section of the first branch flow channel (A1) and the horizontal flow channel section of the second branch flow channel (A2) are parallel, or the first low-pressure inlet (X1) and the second low-pressure inlet (X2) are located on different sides of the flow channel plate (11), so that the horizontal flow channel section of the first branch flow channel (A1) and the horizontal flow channel section of the second branch flow channel (A2) are perpendicular to each other.

7. The heat exchanger of claim 5, wherein The communication position of the horizontal flow channel section and the vertical flow channel section is smoothly transitioned through a flow guide round corner (115).

8. The heat exchanger of claim 1, wherein The low-pressure flow channel (A) comprises a curved flow channel section, and at least the curved flow channel section is provided with a flow guide vane (113).

9. The heat exchanger of claim 1, wherein The heat exchanger comprises a flow channel plate (11), the low-pressure flow channel (A) and the high-pressure flow channel (B) are at least partially formed in the flow channel plate (11), and the low-pressure flow channel (A) and the high-pressure flow channel (B) are spaced apart along the thickness direction of the flow channel plate (11) by the body of the flow channel plate (11), and heat exchange is performed through the body of the flow channel plate (11).

10. An integrated assembly for use in a thermal management system, the integrated assembly comprising: The integrated assembly comprises a liquid accumulator, a valve island, the heat exchanger according to any one of claims 1-9, the heat management system comprises a first valve, a second valve, a first evaporator, a second evaporator, and a compressor, the valve island is provided with at least one of a control valve, the first valve, and the second valve, an outlet of the first evaporator is communicated with a first low-pressure inlet (X1) of the heat exchanger, an outlet of the second evaporator is communicated with a second low-pressure inlet (X2) of the heat exchanger, an inlet of the compressor is communicated with a low-pressure outlet (X3) of the heat exchanger, an outlet of the liquid accumulator is communicated with a high-pressure inlet (Y1) of the high-pressure flow channel (B), and an inlet of the first valve and an inlet of the second valve are communicated with a high-pressure outlet (Y2) of the high-pressure flow channel (B).

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