A runner assembly

Abstract

The utility model discloses a runner assembly, first plate body and second plate body one side portion fixed connection, third plate body and second plate body another side portion fixed connection, second plate body and first plate body at least one of having first groove portion, second plate body and third plate body at least one of having second groove portion, first channel of runner assembly extends from first groove portion to second groove portion to intercommunication first runner and second runner, first channel includes first channel wall and second channel wall, and first channel wall and second channel wall are opposite arrangement along the extension direction of first runner and / or second runner, and first channel wall and second channel wall are equidistant, and when refrigerant passes first channel and flows from first runner to second runner, and the fluid is more evenly distributed between first channel wall and second channel wall, and the fluid resistance that fluid receives between first channel wall and second channel wall is more uniform, thereby the fluid flows more smoothly, improves the problem that the fluid flow resistance is too big in runner assembly.

Description

Technical Field

[0001] This utility model relates to the field of thermal management technology, specifically to a flow channel component for vehicles. Background Technology

[0002] As thermal management systems become increasingly integrated and design space becomes limited, channels are often required in flow channel components to change the flow direction of the flow channels, thereby enabling the fluid to flow normally within the flow channel components. Flow resistance is a key consideration in the structural and performance design of flow channel components. Utility Model Content

[0003] The purpose of this application is to provide a flow channel assembly that optimizes the flow channel assembly structure and improves the problem of excessive fluid flow resistance in the flow channel assembly.

[0004] This application discloses a flow channel assembly, including a first plate, a second plate, and a third plate. The first plate is fixedly connected to one side of the second plate, and the third plate is fixedly connected to the other side of the second plate. The flow channel assembly has a first flow channel and a second flow channel for refrigerant to flow through. At least one of the second plate and the first plate has a first groove, and at least one of the second plate and the third plate has a second groove. The wall forming the first flow channel is located in the first groove, and the wall forming the second flow channel is located in the second groove. The second plate has a first channel extending from the first groove to the second groove. The first channel connects the first flow channel and the second flow channel. The wall forming the first channel includes a first channel wall and a second channel wall. The first channel wall and the second channel wall are arranged opposite each other along the extension direction of the first flow channel and / or along the extension direction of the second flow channel, and the distance between the first channel wall and the second channel wall is evenly distributed.

[0005] The flow channel assembly provided by the technical solution of this application includes a first groove portion having at least one of a second plate and a first plate, and a second groove portion having at least one of a second plate and a third plate. A first channel of the flow channel assembly extends from the first groove portion to the second groove portion to connect the first flow channel and the second flow channel. The first channel includes a first channel wall and a second channel wall. The first channel wall and the second channel wall are arranged opposite to each other along the extension direction of the first flow channel and / or the second flow channel. The distance between the first channel wall and the second channel wall is evenly distributed. When the refrigerant flows from the first flow channel to the second flow channel through the first channel, the fluid is more evenly distributed between the first channel wall and the second channel wall. The flow resistance of the fluid between the first channel wall and the second channel wall is more uniform, so the fluid flow is smoother and the problem of excessive fluid flow resistance in the flow channel assembly is improved. Attached Figure Description

[0006] Figure 1This is an exploded view of the main structure of the flow channel assembly provided in one embodiment of this application;

[0007] Figure 2 yes Figure 1 Schematic diagram of the internal cross-section of the assembled mid-channel components;

[0008] Figure 3 yes Figure 1 Schematic diagram of the second plate structure;

[0009] Figure 4 yes Figure 3 A schematic diagram of the structure on the other side of the second plate.

[0010] Figure 5 yes Figure 1 A schematic diagram showing the flow paths of each channel in the second plate.

[0011] Figure 6 yes Figure 5 A schematic diagram of the structure of the first flow channel and the first passage section;

[0012] Figure 7 yes Figure 6 A cross-sectional view of the second plate at the first channel.

[0013] Figure 8 It is a schematic diagram of the projection of the walls of the first flow channel, the second flow channel and the third flow channel along the thickness direction of the second plate.

[0014] Figure 9 yes Figure 6 A cross-sectional view of the second plate at the second channel.

[0015] Figure 10 yes Figure 9 Enlarged view of point A in the middle;

[0016] Figure 11 This is a schematic diagram of the structure of the second plate body in the comparative embodiment, relative to the embodiments of this application;

[0017] Figure 12 These are fluid streamline diagrams near the first channel in embodiments of this application and corresponding embodiments;

[0018] Figure 13 These are fluid streamline diagrams near the second channel of embodiments of this application and corresponding embodiments;

[0019] Explanation of reference numerals in the attached drawings: 1. First plate; 2. Second plate; 3. Third plate; 10. First flow channel; 20. Second flow channel; 30. Third flow channel; 40. Fourth flow channel; 11. First groove; 12. Second groove; 13. Third groove; 14. Fourth groove; 100. First channel; 200. Second channel; 101. First port; 102. Second port; 103. Third port; 104. Fourth port; 105. First inlet; 301. First outlet; 302. Second outlet; 401. Refrigerant inlet channel; 402. Refrigerant outlet channel; 201. First refrigerant outlet channel; Overlapping area; 202, second overlapping area; 1001, first transition section; 1002, second transition section; 110, first channel wall; 120, second channel wall; 111, first side wall; 112, second side wall; 1101, first arc-shaped wall; 1201, second arc-shaped wall; 1102, first circular arc wall; 1202, second circular arc wall; 113, third side wall; 114, fourth side wall; 1003, third transition section; 1301, third arc-shaped wall; 222, first reinforcing rib; 444, second reinforcing rib; 115, first bottom wall; 116, second bottom wall; M, buffer area. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the scope of the utility model.

[0021] refer to Figures 1 to 6This application provides a flow channel assembly, which includes a first plate 1, a second plate 2, and a third plate 3. The first plate 1 is fixedly connected to one side of the second plate 2, and the third plate 3 is fixedly connected to the other side of the second plate 2. The fixed connection includes welding, bonding, fastener connection, etc. The flow channel assembly has a first flow channel 10 and a second flow channel 20. In this embodiment, the first flow channel 10 and the second flow channel 20 flow with refrigerant. In other embodiments, they can also flow with coolant. The second plate 2 and the first... At least one of the plates 1 has a first groove 11, and at least one of the second plates 2 and the third plates 3 has a second groove 12. The wall forming the first flow channel 10 is located in the first groove 11, and the wall forming the second flow channel 20 is located in the second groove 12. The second plate 2 has a first channel 100, which extends from the first groove 11 to the second groove 12 and connects the first flow channel 10 and the second flow channel 20. Specifically, in this embodiment, the first plate 1 and the third plate 3 are flat cover plates. A first groove 11 and a second groove 12 are machined onto the second plate 2. The first groove 11 is located on one side of the second plate 2, with its opening facing the first plate 1. The second groove 12 is located on the opposite side of the second plate 2, with its opening facing the third plate 3. The first plate 1 is welded to the first groove 11 to define the first flow channel 10. The third plate 3 is welded to the second groove 12 to define the second flow channel 20. The first channel 100 extends along the thickness direction of the second plate 2 and penetrates through it. The second plate 2 connects the first flow channel 10 located in the first groove 11 with the second flow channel 20 located in the second groove 12. Of course, in other embodiments, the first plate 1 has all the first grooves 11, the third plate 3 has all the second grooves 12, and the openings of the first grooves 11 and the second grooves 12 are both facing the straight second plate 2. Alternatively, the first grooves 11 are partially located in the first plate 1 and the other part is located in the second plate 2, and the second grooves 12 are partially located in the third plate 3 and the other part is located in the second plate 2.

[0022] Traditional flow channel components typically reduce pressure loss by increasing the flow area. However, this method has several limitations, such as space constraints. When space is limited, there is no opportunity to increase the flow area. Furthermore, increasing the flow area may reduce the channel's strength, affecting its pressure resistance. (Reference) Figure 6In this embodiment, the walls forming the first channel 100 include a first channel wall 110 and a second channel wall 120. The first channel wall 110 and the second channel wall 120 are arranged along the extension direction of the first flow channel 10 and / or along the extension direction of the second flow channel 20. In other words, the first channel wall 110 and the second channel wall 120 are arranged along the fluid flow direction in the first flow channel 10 and / or the second flow channel 20. This fluid flow direction refers to the general direction of the fluid except for minor turbulence in the flow channel. In addition, in order to achieve the purpose of reducing flow resistance in this application, the flow channels of the first flow channel 10 and the second flow channel 20 are gentle. Therefore, the extension direction of the first flow channel 10 is approximately the line connecting the center of the first inlet 105 of the first flow channel 10 and the center of the first port 101 of the first channel 100 in the first groove 11. The extension direction of the second flow channel 20 is approximately the line connecting the center of the third port 103 of the first channel 100 in the second groove 12 and the fourth port 101 of the end of the second flow channel 20. To reduce the flow resistance of the first flow channel 10, the second flow channel 20, and the first channel 100, the extension direction of the first flow channel 10 is aligned with the extension direction of the second flow channel 20. That is, the line connecting the center of the first inlet 105 and the center of the first port 101 is collinear with or forms an obtuse angle greater than 170 degrees with the line connecting the center of the third port 103 and the center of the fourth port 104. The first channel wall 110 and the second channel wall 120 are evenly spaced, meaning that the first channel wall 110 is equidistant from the second channel wall 120 along the extension direction of the first flow channel 10 and / or along the extension direction of the second flow channel 20. In other words, when the first channel wall 110 and the second channel wall 120 are straight walls, the first channel wall 110 and the second channel wall 120 are parallel; when the first channel wall 110 and the second channel wall 120 are curved walls, the curvature centers of each segment of the first channel wall 110 and the second channel wall 120 coincide. When the refrigerant flows from the first channel 10 to the second channel 20 through the first channel 100, the fluid is more evenly distributed between the first channel wall and the second channel wall. The flow resistance between the first channel wall and the second channel wall is more uniform, resulting in smoother fluid flow. This reduces turbulence at the first channel 100, avoids significant pressure loss in the first channel 10 and the second channel 20 upstream and downstream of the first channel 100, and improves the problem of excessive fluid flow resistance in the channel assembly.

[0023] Further, refer to Figures 6 to 8Along the thickness direction of the second plate 2, the projections of the first groove 11 and the second groove 12 have a first overlapping region 201. The projection of the wall forming the first channel 100 is located in the first overlapping region 201. The channel segment of the first flow channel 10 in the first overlapping region 201 is defined as the first transition segment 1001, and the channel segment of the second flow channel 20 in the first overlapping region 201 is defined as the second transition segment 1002. The extension direction of the first transition segment 1001 is consistent with the extension direction of the second transition segment 1002. Along the extension direction of the first transition segment 1001 or the extension direction of the second transition segment 1002, the first channel wall 110 and the second channel wall 1001 are... The two flow channels are arranged at equal intervals. The first transition section 1001 is the flow channel section of the first flow channel 10 at the first channel 100, and it is also the end section of the first flow channel 10 near the second flow channel 20. The second transition section 1002 is the flow channel section of the second flow channel 20 at the first channel 100, and it is also the beginning section of the second flow channel 20 near the first flow channel 10. Setting the flow channel extension direction of the first transition section 1001 and the second transition section 1002 to be consistent can reduce the situation of fluid hitting the wall in the two transition sections, avoid the fluid from generating large pressure loss in the first transition section 1001 and the second transition section 1002, and thus reduce the flow resistance of the fluid in the flow channel assembly.

[0024] refer to Figures 6 to 8 The first groove 11 has a first inlet 105. The first groove 11 includes a first sidewall 111 and a second sidewall 112. The first sidewall 111 and the second sidewall 112 are arranged opposite to each other and are connected by a first bottom wall 115 of the first groove 11. Along the direction from the center of the first inlet 105 to the center of the first port 101, the distance between the first sidewall 111 and the second sidewall 112 gradually increases. In this way, on the one hand, the flow area of ​​the first flow channel 10 can be increased, thereby reducing the pressure loss of the fluid. On the other hand, after the distance between the first sidewall 111 and the second sidewall 112 gradually increases, the area of ​​the first bottom wall 115 of the first groove 11 is larger near the first channel 100, which allows for the design of a larger first channel 100 and reduces the pressure loss of the fluid flowing in the first channel 100.

[0025] Furthermore, the first channel wall 110 includes a first arcuate wall 1101, and the second channel wall 120 includes a second arcuate wall 1201. The first arcuate wall 1101 and the second arcuate wall 1201 are concentrically arranged. The curvature centers of the first arcuate wall 1101 and the second arcuate wall 1201 are located between the first port 101 and the first inlet 105. The wall forming the first channel 100 includes a first circular arcuate wall 1102 and a second circular arcuate wall 1202. One end of the first arcuate wall 1101 and one end of the second arcuate wall 1201 pass through the first circular arcuate wall 1101. 2. Smooth connection: The other end of the first arc-shaped wall 1101 and the other end of the second arc-shaped wall 1201 are smoothly connected through the second circular arc wall 1202. In this embodiment, the shape of the first channel 100 is roughly a curved oval hole. On the one hand, the first channel 100 is set in this shape, which facilitates tool processing and can even achieve one-cut forming, thereby reducing the machining cycle time. On the other hand, the arc-shaped protrusion in the middle section of the second arc-shaped wall 1201, which is relatively close to the direction of the first inlet 105, can prevent fluid from flowing against each other in the first channel 100, thereby reducing pressure loss.

[0026] refer to Figure 11 Compared to the above embodiments, a comparative embodiment is provided. The only difference between the comparative embodiment and the embodiment of this application is that the flow cross-section of the first channel 100 is an irregular hole, and its flow cross-sectional area is larger than that of the embodiment of this application. According to conventional thinking, the larger the cross-sectional area of ​​the comparative embodiment, the smaller the pressure drop should be. However, the structural characteristics of the first channel 100 in the embodiment of this application allow the fluid of the same flow rate to be evenly distributed throughout the first channel 100. The flow resistance experienced by the fluid in most places is uniform. Since the flow resistance experienced by the fluid is more uniform after passing through the first channel 100, the flow is smoother, which also leads to a smoother fluid flow before passing through the first channel 100. (Refer to...) Figure 12 The simulated streamline diagrams also prove this point: Figure 12 The simulated streamline diagram on the left is a streamline diagram of the comparative embodiment. Figure 12 The simulated streamline diagram on the right is a streamline diagram of an embodiment of this application. It is clear that the fluid flow in the first flow channel 10 of the streamline diagram of this embodiment is smoother. In addition, simulations were performed according to the five operating conditions of the thermal management system. During the simulation, the inlet temperature, inlet pressure, and mass fluid were kept constant for both implementations under each operating condition. The pressure drop, enthalpy difference, and efficiency under each operating condition were recorded. It should be noted that an enthalpy value is obtained by looking up the inlet temperature and pressure table. The heat exchange can be obtained by simulation calculation. The enthalpy difference can be calculated by the heat exchange and the refrigerant flow rate. The ideal outlet pressure and temperature is that the pressure does not decrease, but the temperature decreases to the low-pressure side temperature. Therefore, an enthalpy value is obtained by looking up this temperature and pressure. Efficiency = enthalpy difference / (inlet enthalpy value - ideal outlet enthalpy value).

[0027] Table 1: Comparison of Simulation Results between This Example and the Comparative Example

[0028]

[0029]

[0030] As can be seen from the simulation results comparison table of this embodiment and the comparative embodiment above, under the condition that the efficiency remains basically unchanged, the voltage drop of this embodiment is significantly reduced compared with the comparative embodiment under each operating condition.

[0031] Additionally, refer to Figure 3 , Figure 5 as well as Figures 8 to 10 The flow channel assembly also has a third flow channel 30. At least one of the second plate 2 and the first plate 1 also has a third groove 13. In this embodiment, the third groove 13 is located in the second plate 2, and the wall forming the third flow channel 30 is located in the third groove 13. The second plate 2 has a second channel 200, which connects the second flow channel 20 and the third flow channel 30. The third groove 13 has a first outlet 301, a second outlet 302, and a second port 102 of the second channel 200. Along the extension direction of the third flow channel 30, the first outlet 301 is located on one side of the second port 102, and the second outlet 302 is located on the other side of the second port 102. The third groove 13 includes a third sidewall 113 and a fourth sidewall 114, which are disposed opposite to each other. The third sidewall 113 and the fourth sidewall 114 are connected by the third groove 13. The second bottom wall 116 of the third flow channel 3 is connected, and the second port 102 is located on the second bottom wall 116. The distance between the third side wall 113 and the fourth side wall 114 is increased along the direction from the center of the first outlet 301 to the center of the second port 102. In the third flow channel 30, the flow channel section closer to the second channel 200 has a larger flow area. In this way, when the fluid enters the third flow channel 30 from the second flow channel 20 through the second channel 200, excessive fluid pressure loss due to change of direction is avoided, and the flow resistance of the fluid in the flow channel assembly is reduced. In addition, the flow channel section closer to the second channel 200 has a larger flow area, and the area where the second port 102 can be set is larger, avoiding fluid congestion at the second channel 200.

[0032] Further, refer to Figures 8 to 10Along the thickness direction of the second plate 2, the projections of the second groove 12 and the third groove 13 overlap in a second region 202. The projection of the wall forming the second channel 200 is located in the second overlap region 202. The channel segment of the second flow channel 20 in the second overlap region 202 is defined as the third transition segment 1003. Along the extension direction of the third transition segment 1003, the fourth sidewall 114 is away from the second flow channel 20 relative to the second port 102. When fluid enters the third flow channel 30 from the second flow channel 20 through the second channel 200, it will impact the fourth sidewall 114, forming a gap between the wall of the second channel 200 and the fourth sidewall 114. (Reference) Figure 11 This is a comparative embodiment of the present embodiment. In the comparative embodiment, the wall forming the second channel 200 and the fourth side wall 114 have no gap, or in other words, along the thickness direction of the second plate 2, the projection of the wall forming the second channel 200 is tangent to the projection of the fourth side wall 114. In the comparative embodiment, when the fluid enters the third channel 30 from the second flow channel 20 through the second channel 200, it will directly impact the fourth side wall 114 and the first plate 1. The fluid impacting the fourth side wall 114 will cause fluid congestion in the second channel 200 with the fluid subsequently entering the third flow channel 30, increasing the turbulence tendency and resulting in greater fluid flow resistance. However, in this embodiment, as... Figure 8 and Figure 10 As shown, after the distance between the wall forming the second channel 200 and the fourth side wall 114 is set, a buffer zone M will be formed in the third flow channel 30. This reduces the possibility of congestion in the second channel 200 after the fluid hits the fourth side wall 114 and the fluid subsequently entering the third flow channel 30. Increasing the buffer zone can make the fluid flow smoother to a certain extent, reduce the turbulence tendency, and reduce the flow resistance. (Refer to...) Figure 13 The simulated streamline diagrams also prove this point: Figure 13 The simulated streamline diagram on the left is the streamline diagram of the comparative embodiment without a buffer. Figure 12 The simulated streamline diagram on the right is a streamline diagram of the buffer zone set in the embodiment of this application. It can be clearly seen that the fluid flow in the third channel 30 in the streamline diagram of the embodiment of this application is smoother, especially the fluid flow from the second port to the second outlet is smoother.

[0033] Furthermore, the fourth sidewall 114 includes a third arcuate wall 1301, the center of curvature of which is located on the side of the fourth sidewall 114 away from the second port 102. The first outlet 301 and the second outlet 302 are close to the fourth sidewall 114 relative to the second port 102. Designing the fourth sidewall 114 as an arcuate wall convex towards the second flow channel facilitates a smoother turn of the fluid after it hits the fourth sidewall 114, leading to the left and right outlets respectively.

[0034] The flow channel assembly also has a third flow channel 30 and a fourth flow channel 40. The second plate 2 includes a third groove 13, a fourth groove 14 and a first groove 11 with openings facing the first plate 1. The second plate 2 also includes a second groove 12 with openings facing the third plate 3. The first groove 11, the third groove 13 and the fourth groove 14 are fixedly connected to the first plate 1 to form the first flow channel 10, the third flow channel 30 and the fourth flow channel 40 respectively. The second groove 12 is fixedly connected to the first plate 1 to form the second flow channel 20. Along the thickness direction of the second plate 2, the projection of the second groove 12 overlaps with the projection of the fourth groove 14. The fluid in the second flow channel 20 can exchange heat with the fluid in the fourth flow channel 40. Therefore, the flow channel assembly of this embodiment can be used as an intermediate heat exchanger in a thermal management system.

[0035] Similarly, refer to Figure 3 and Figure 5 In order to reduce the fluid resistance in the fourth flow channel 40, in this embodiment, the fourth groove 14 has a refrigerant inlet channel 401 and a refrigerant outlet channel 402. The refrigerant inlet channel 401 and the refrigerant outlet channel 402 have ports on the bottom wall of the fourth groove 14. A chamfer or rounded corner is provided at the connection between the wall of the refrigerant inlet channel 401 and the bottom wall of the fourth groove 14, and / or a chamfer or rounded corner is provided at the connection between the wall of the refrigerant outlet channel 402 and the bottom wall of the fourth groove 14. In this way, when the fluid passes through the connection between the refrigerant inlet channel 401 and the fourth flow channel 40, and when the fluid passes through the connection between the refrigerant outlet channel 402 and the fourth flow channel 40, the fluid flow is smoother and the flow resistance is reduced.

[0036] In addition, to avoid the large flow area in the second flow channel 20 and the fourth flow channel 40, which would affect the pressure resistance of the flow channels, the second groove 12 has a first reinforcing rib 222 and the fourth groove 14 has a second reinforcing rib. The first reinforcing rib 222 is arranged along the extension of the second flow channel 20 and the second reinforcing rib is arranged along the extension of the fourth flow channel 40. The first reinforcing rib 222 protrudes towards the third plate 3 relative to the bottom wall of the second groove 12 and protrudes towards the first plate 1 relative to the bottom wall of the fourth groove 14. The first reinforcing rib 222 is welded and fixed to the third plate 3 and the second reinforcing rib is welded and fixed to the first plate 1.

[0037] It should be noted that the above description uses specific examples to illustrate the principle and implementation of this utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A flow channel assembly, characterized in that, The assembly includes a first plate (1), a second plate (2), and a third plate (3). The first plate (1) is fixedly connected to one side of the second plate (2), and the third plate (3) is fixedly connected to the other side of the second plate (2). The flow channel assembly has a first flow channel (10) and a second flow channel (20). At least one of the second plate (2) and the first plate (1) has a first groove (11), and at least one of the second plate (2) and the third plate (3) has a second groove (12). The wall forming the first flow channel (10) is located in the first groove (11), and the wall forming the second flow channel (20) is located in the second groove (12). 12) The second plate (2) has a first channel (100) extending from the first groove (11) to the second groove (12). The first channel (100) connects the first flow channel (10) and the second flow channel (20). The wall forming the first channel (100) includes a first channel wall (110) and a second channel wall (120). The first channel wall (110) and the second channel wall (120) are arranged opposite to each other along the extension direction of the first flow channel (10) and / or along the extension direction of the second flow channel (20). The first channel wall (110) and the second channel wall (120) are evenly spaced.

2. The flow channel assembly according to claim 1, characterized in that, Along the thickness direction of the second plate (2), the projection of the first groove (11) and the projection of the second groove (12) have a first overlapping area (201), and the projection of the wall forming the first channel (100) is located in the first overlapping area (201).

3. The flow channel assembly according to claim 2, characterized in that, The first groove (11) has a first inlet (105). The first groove (11) includes a first sidewall (111), a second sidewall (112), and a first bottom wall (115). The first sidewall (111) and the second sidewall (112) are arranged opposite to each other. The first bottom wall (115) connects the first sidewall (111) and the second sidewall (112). The first channel (100) has a first port (101) on the first bottom wall (115). The channel points from the center of the first inlet (105) to the center of the first port (101). The distance between the first sidewall (111) and the second sidewall (112) gradually increases.

4. The flow channel assembly according to claim 3, characterized in that, The first channel wall (110) includes a first arcuate wall (1101), and the second channel wall (120) includes a second arcuate wall (1201). The first arcuate wall (1101) and the second arcuate wall (1201) are concentrically arranged. The curvature center of the first arcuate wall (1101) and the curvature center of the second arcuate wall (1201) are located between the first port (101) and the first inlet (105). The wall forming the first channel (100) includes a first circular arcuate wall (1102) and a second circular arcuate wall (1202). One end of the first arcuate wall (1101) and one end of the second arcuate wall (1201) are smoothly connected through the first circular arcuate wall (1102), and the other end of the first arcuate wall (1101) and the other end of the second arcuate wall (1201) are smoothly connected through the second circular arcuate wall (1202).

5. The flow channel assembly according to any one of claims 1-4, characterized in that, The flow channel assembly further includes a third flow channel (30), and at least one of the second plate (2) and the first plate (1) further includes a third groove (13), the wall forming the third flow channel (30) being located in the third groove (13), the second plate (2) having a second channel (200) connecting the second flow channel (20) and the third flow channel (30), the third groove (13) having a first outlet (301), a second outlet (302) and a second port (102) of the second channel (200), the first outlet (301) being located in the second channel (200) along the extension direction of the third flow channel (30), the second outlet (301) being located in the second channel (200). On one side of port (102), the second outlet (302) is located on the other side of the second port (102). The third groove (13) includes a third sidewall (113) and a fourth sidewall (114). The third sidewall (113) and the fourth sidewall (114) are arranged opposite to each other. In the direction from the center of the first outlet (301) to the center of the second port (102), the distance between the third sidewall (113) and the fourth sidewall (114) increases. In the direction from the center of the second outlet (302) to the center of the second port (102), the distance between the third sidewall (113) and the fourth sidewall (114) increases.

6. The flow channel assembly according to claim 5, characterized in that, Along the thickness direction of the second plate (2), the projection of the second groove (12) and the projection of the third groove (13) have a second overlapping area (202). The projection of the wall forming the second channel (200) is located in the second overlapping area (202). The second groove (12) includes a second bottom wall (116). The second bottom wall (116) connects the third side wall (113) and the fourth side wall (114). The second port (102) is located on the second bottom wall (116). The fourth side wall (114) is away from the second flow channel (20) relative to the second port (102). The wall forming the second channel (200) and the fourth side wall (114) have a gap.

7. The flow channel assembly according to claim 6, characterized in that, The fourth sidewall (114) includes a third arcuate wall (1301), the center of curvature of which is located on the side of the fourth sidewall (114) away from the second port (102), and the first outlet (301) and the second outlet (302) are close to the fourth sidewall (114) relative to the second port (102).

8. The flow channel assembly according to any one of claims 1-7, characterized in that, The flow channel assembly also has a third flow channel (30) and a fourth flow channel (40). The second plate (2) includes a third groove (13), a fourth groove (14) and a first groove (11) with openings facing the first plate (1). The second plate (2) includes a second groove (12) with openings facing the third plate (3). The first groove (11), the third groove (13) and the fourth groove (14) are fixedly connected to the first plate (1) to form the first flow channel (10), the third flow channel (30) and the fourth flow channel (40) respectively. The second groove (12) is fixedly connected to the first plate (1) to form the second flow channel (20). Along the thickness direction of the second plate (2), the projection of the second groove (12) overlaps with the projection of the fourth groove (14).

9. The flow channel assembly according to claim 8, characterized in that, The fourth groove (14) has a refrigerant inlet channel (401) and a refrigerant outlet channel (402). The refrigerant inlet channel (401) and the refrigerant outlet channel (402) have ports on the bottom wall of the fourth groove (14). A chamfer or rounded corner is provided at the connection between the wall of the refrigerant inlet channel (401) and the bottom wall of the fourth groove (14), and / or a chamfer or rounded corner is provided at the connection between the wall of the refrigerant outlet channel (402) and the bottom wall of the fourth groove (14).

10. The flow channel assembly according to claim 9, characterized in that, The second groove (12) has a first reinforcing rib (222), and the fourth groove (14) has a second reinforcing rib. The first reinforcing rib (222) is arranged along the extension of the second flow channel (20), and the second reinforcing rib is arranged along the extension direction of the fourth flow channel (40). The first reinforcing rib (222) protrudes towards the third plate (3) relative to the bottom wall of the second groove (12), and the second reinforcing rib protrudes towards the first plate (1) relative to the bottom wall of the fourth groove (14). The first reinforcing rib (222) is welded and fixed to the third plate (3), and the second reinforcing rib is welded and fixed to the first plate (1).

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