Heat exchange plate and plate heat exchanger

Abstract

The application relates to the technical field of heat exchange, in particular to a heat exchange plate and a plate heat exchanger. The heat exchange plate is provided with oppositely arranged first and second side walls, third and fourth side walls along the length and width directions of the plate body, and is provided with an inlet and an outlet; the heat exchange plate further comprises first and second guide strips, the first guide strip extends along the length direction, a first channel is formed between the first guide strip and the third side wall, and the inlet is located in the first channel; the second guide strip comprises a first section and a second section, the first section is located between the second side wall and the first guide strip, separates the inlet from the outlet, one end of the first section is connected with the third side wall, the other end extends along the width direction towards the fourth side wall and is connected with the second section, the second section extends along the length direction towards the first side wall, a second channel is formed between the second section and the first guide strip along the width direction, and a third channel is formed between the second section and the fourth side wall. In this way, the utilization rate of the heat exchange area on the heat exchange plate is improved, and the heat exchange performance is improved.

Description

Technical Field

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

[0002] Plate heat exchangers are primarily used as cooling devices for battery modules. They typically contain stacked heat exchange plates. Refrigerant flows through the inlet of each plate, exchanges heat, and then exits through the outlet, thus cooling the battery module. However, existing heat exchange plate designs are relatively simple, resulting in uneven refrigerant distribution and low utilization of the heat exchange area, leading to poor heat exchange performance. Utility Model Content

[0003] Therefore, it is necessary to provide a heat exchange plate and plate heat exchanger that can make the refrigerant more evenly distributed on the heat exchange plate and improve the utilization rate of the heat exchange area on the heat exchange plate.

[0004] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0005] A heat exchange plate includes a plate body having a groove. Along the length of the plate body, the groove has a first sidewall and a second sidewall disposed opposite to each other. Along the width of the plate body, the groove has a third sidewall and a fourth sidewall disposed opposite to each other. The bottom wall of the groove has a through-hole inlet and an outlet, the inlet being disposed near the first sidewall and the outlet being disposed near the second sidewall. The heat exchange plate further includes:

[0006] A first guide bar is disposed on the bottom wall of the groove and extends along the length direction of the plate. One end of the first guide bar is connected to the first side wall, and the other end forms a gap with the second side wall. In the width direction of the plate, a first channel is formed between the first guide bar and the third side wall, and the inlet is located in the first channel.

[0007] The second guide bar is disposed on the bottom wall of the groove and includes a first section and a second section. The first section is located between the second side wall and the end of the first guide bar away from the first side wall, and separates the inlet from the outlet. One end of the first section is connected to the third side wall, and the other end extends towards the fourth side wall along the width direction of the plate. One end of the second section is connected to the first section, and the other end extends towards the first side wall along the length direction of the plate. The second section forms a second channel between the second guide bar and the first guide bar in the width direction of the plate, and a third channel between the second section and the fourth side wall.

[0008] The first channel, the second channel, and the third channel are connected in sequence.

[0009] It is understood that this application, by setting a first guide bar and a second guide bar on the bottom wall of the plate, connects one end of the first guide bar to the first side wall and extends along the length of the plate, and extends the first section of the second guide bar in the width direction of the plate, with one end connected to the third side wall, and one end of the second section connected to the first section, and the other section extending along the length of the plate towards the first side wall, forms a first channel, a second channel, and a third channel that are connected in sequence on the plate. This allows the refrigerant to enter from the inlet, pass through the first, second, and third channels, and then exit from the outlet. In this way, the uniformity of fluid distribution on the heat exchange plate is effectively optimized. At the same time, it allows the fluid to cover as much area of ​​the groove as possible, significantly improving the utilization rate of the heat exchange area and extending the residence time of the fluid on the heat exchange plate, so that the refrigerant can undergo sufficient heat exchange on the heat exchange plate, thereby improving the heat exchange performance of the heat exchange plate.

[0010] In one embodiment, along the width direction of the plate, the width of the first channel is W1, the width of the second channel is W2, and the width of the third channel is W3, wherein W1, W2, and W3 satisfy: W1 < W2 < W3.

[0011] It is understandable that refrigerant will gradually generate more gas during heat exchange. By setting the gradient width of the first, second and third channels, the volume of refrigerant flowing through the first, second and third channels gradually increases. In this way, the influence of gas on the smoothness of refrigerant flow can be reduced, thereby ensuring that the refrigerant is in full contact with the plate, further optimizing the uniformity of fluid distribution on the heat exchange plate, and improving the heat exchange performance of the heat exchange plate.

[0012] In one embodiment, the line connecting the axis of the inlet and the axis of the outlet is L, and L is parallel to the length direction of the plate.

[0013] It is understandable that setting the line connecting the inlet axis and the outlet axis parallel to the length direction of the plate can optimize the fluid path, so that the refrigerant can cover the third channel as much as possible after flowing through the second section of the second guide bar in the second channel, thereby making full use of the heat exchange area of ​​the heat exchange plate and improving the heat exchange performance.

[0014] In one embodiment, the distance between the first sidewall and the second sidewall along the length of the plate is D, and the length of the first guide strip is D1, where D and D1 satisfy: 0.4D≤D1≤0.6D.

[0015] Understandably, setting 0.4D≤D1 guides the refrigerant to flow along a longer path within the first channel, making full use of the heat exchange area of ​​the first channel. At the same time, setting D1≤0.6D avoids the first guide bar being too long, which could affect the setting of the second guide bar and the layout of the fluid channel. In other words, by setting the length of the first guide bar, the fluid path on the heat exchange plate is optimized, ensuring that the heat exchange plate has good heat exchange performance.

[0016] In one embodiment, the end of the first segment that connects to the third sidewall is a connecting end, and the connecting end is located on the third sidewall at a position one-third to three-quarters away from the first sidewall along the length of the plate.

[0017] In one embodiment, the first segment includes a first rib and a second rib. One end of the first rib is connected to the third sidewall, and the other end extends toward the fourth sidewall along the width direction of the plate and is connected to one end of the second rib. The end of the second rib away from the first rib extends toward the fourth sidewall and is inclined away from the second sidewall along the length direction of the plate.

[0018] Understandably, the first rib can guide the refrigerant to flow from the third sidewall to the fourth sidewall, and through the inclined extension of the second rib, a gradual fluid turning path is formed, so that the refrigerant can smoothly transition to the length direction of the plate, avoiding eddies or pressure loss caused by sharp bends, while increasing the coverage of the groove edge area, further improving the utilization rate of the heat exchange area.

[0019] In one embodiment, the second rib is tilted at an angle θ relative to the width direction of the plate, where 50°≤θ≤70°.

[0020] In one embodiment, the first guide bar has a third segment, a fourth segment, and a fifth segment connected in sequence, the third segment being connected to the first sidewall, and the fifth segment forming the gap with the second sidewall;

[0021] The fourth segment is inclined toward the third sidewall from the end connected to the third segment to the end connected to the fifth segment relative to the width direction of the plate.

[0022] It is understandable that the inlet is located near the first sidewall of the first channel, and the third section is located away from the third sidewall in the width direction of the fifth section of the plate. This increases the width of the first channel in the third section of the plate, leaving space for the inlet. At the same time, it does not affect the width of the first, second, and third channels in the width direction of the plate. In other words, by setting the third, fourth, and fifth sections, the layout of the first guide bar is optimized, ensuring that the refrigerant can smoothly enter the groove of the heat exchange plate while improving the heat exchange performance.

[0023] This application also provides the following technical solutions:

[0024] A plate heat exchanger includes the heat exchange plate described in the above embodiments.

[0025] In one embodiment, the plate heat exchanger further includes fins, which are stacked on the heat exchange plate along the height direction of the plate heat exchanger and have clearance grooves for avoiding the first guide bar and the second guide bar of the heat exchange plate; and the fins are also provided with a plurality of flow guide grooves, which are arranged at intervals along the length direction of the plate body.

[0026] Understandably, the design of the flow channels on the fins can increase the residence time of the refrigerant at its corresponding position, thereby achieving sufficient heat exchange between the refrigerant and the heat exchange plate and improving the overall heat exchange performance of the plate heat exchanger.

[0027] Compared with existing technologies, the heat exchange plate and plate heat exchanger described herein, by setting a first guide bar and a second guide bar on the bottom wall of the groove of the plate body, connects one end of the first guide bar to the first side wall and extends along the length direction of the plate body, and extends the first section of the second guide bar in the width direction of the plate body, with one end connected to the third side wall, and one end of the second section connected to the first section, and the other section extending along the length direction of the plate body towards the first side wall, forms a first channel, a second channel and a third channel that are connected in sequence on the plate body. This allows the refrigerant to enter from the inlet and flow through the first, second and third channels before exiting from the outlet. In this way, the uniformity of fluid distribution on the heat exchange plate is effectively optimized. At the same time, it allows the fluid to cover as much area of ​​the groove as possible, significantly improving the utilization rate of the heat exchange area and extending the residence time of the fluid on the heat exchange plate, so that the refrigerant can undergo sufficient heat exchange on the heat exchange plate, thereby improving the heat exchange performance of the heat exchange plate. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the plate heat exchanger provided in this application.

[0030] Figure 2 A schematic diagram of the heat exchange plate provided in this application.

[0031] Figure 3 This is a schematic diagram of the heat exchange plate in one embodiment provided in this application.

[0032] Figure 4 This is a schematic diagram of the structure of the fins provided in this application.

[0033] Figure 5 This is a schematic diagram of the structure of the fins and heat exchange plate after assembly, as provided in this application.

[0034] 100. Heat exchange plate; 10. Plate body; 11. Groove; 111. First sidewall; 112. Second sidewall; 113. Third sidewall; 114. Fourth sidewall; 115. Bottom wall of the tank; 20. Inlet; 30. Outlet; 40. First guide bar; 41. Gap; 42. First channel; 43. Third section; 44. Fourth section; 45. Fifth section; 50. Second guide bar; 51. First section; 511. Connecting end; 512. First rib; 513. Second rib; 52. Second section; 53. Second channel; 54. Third channel;

[0035] 200, Plate heat exchanger; 201, Fins; 2011, Clearance groove; 2012, Flow guide groove. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0041] Please see Figure 1 This application provides a plate heat exchanger 200, which includes heat exchange plates 100. The refrigerant is evenly distributed within the layers of the plate heat exchanger 200, i.e. on the heat exchange plates 100, by means of the structural arrangement of the heat exchange plates 100, and the utilization rate of the heat exchange area of ​​the heat exchange plates 100 is improved, thereby improving the heat exchange performance of the plate heat exchanger 200.

[0042] like Figure 2As shown, the heat exchange plate 100 includes a plate body 10, which has a groove 11. Along the length direction y of the plate body 10, the groove 11 has a first sidewall 111 and a second sidewall 112 disposed opposite to each other. Along the width direction x of the plate body 10, the groove 11 has a third sidewall 113 and a fourth sidewall 114 disposed opposite to each other. Furthermore, the bottom wall 115 of the groove 11 has a through-through inlet 20 and an outlet 30. The inlet 20 is disposed near the first sidewall 111, and the outlet 30 is disposed near the second sidewall 112. The heat exchange plate 100 also includes a first guide bar 40 and a second guide bar 50. The first guide bar 40 is disposed on the bottom wall 115 and extends along the length direction y of the plate body 10. One end of the first guide bar 40 is connected to the first sidewall 111, and the other end forms a gap 41 with the second sidewall 112. In the width direction x of the plate body 10, the first guide bar 40 and the second guide bar 50 are connected opposite to each other. A first channel 42 is formed between the third sidewalls 113, and the inlet is located within the first channel 42; a second guide bar 50 is disposed on the bottom wall 115 of the groove and includes a first section 51 and a second section 52. The first section 51 is located between the second sidewall 112 and the end of the first guide bar 40 away from the first sidewall 111, and separates the inlet 20 from the outlet 30. One end of the first section 51 is connected to the third sidewall 113, and the other end extends along the width direction x of the plate 10 toward the fourth sidewall 114. One end of the second section 52 is connected to the first section 51, and the other end extends along the length direction y of the plate 10 toward the first sidewall 111. The second section 52 forms a second channel 53 between the plate 10 and the first guide bar 40 in the width direction x, and a third channel 54 between the second section 52 and the fourth sidewall 114. The first channel 42, the second channel 53, and the third channel 54 are connected sequentially. It should be noted that the length direction y of the plate 10 mentioned in the application document refers to the main flow direction of the fluid. The heat exchange plate can be, but is not limited to, rectangular, circular or elliptical, etc.

[0043] It is understood that this application provides a first guide bar 40 and a second guide bar 50 on the bottom wall 115 of the plate 10, with one end of the first guide bar 40 connected to the first side wall 111 and extending along the length direction y of the plate 10. The first segment 51 of the second guide bar 50 extends along the width direction x of the plate 10, with one end connected to the third side wall 113. One end of the second segment 52 is connected to the first segment 51, and the other segment extends along the length direction y of the plate 10 toward the first side wall 111. This forms a first channel 42, a second channel 53, and a third channel 54 that are connected in sequence on the plate 10. This ensures that the path guiding the refrigerant from the inlet 20 to the outlet 30 passes through the series path of the first channel 42, the second channel 53, and the third channel 54, thus preventing the refrigerant from directly connecting the axis of the inlet 20 to the axis of the outlet 30. The fluid flows straight to the outlet 30, meaning that the formation of three channels allows the fluid to fully cover the groove 11 on the plate 10, effectively optimizing the uniformity of fluid distribution on the heat exchange plate 100 and improving the utilization rate of the heat exchange area of ​​the heat exchange plate 100. At the same time, through the gap 41 between the first guide bar 40 and the second side wall 112 and the two-section setting of the second guide bar 50, the refrigerant can flow through the edge areas of the groove 11 near the third side wall 113, the fourth side wall 114 and the second guide bar 50, avoiding the problem of idle edge heat exchange area in the existing heat exchange plate 100. The three-channel setting increases the flow path of the refrigerant in the plate and prolongs the residence time of the refrigerant on the heat exchange plate 100, so that it can carry out sufficient heat exchange, thereby improving the heat exchange performance of the heat exchange plate 100.

[0044] Here, the plate 10, the first guide bar 40, and the second guide bar 50 can be integrally stamped or integrally injection molded. In this way, the stability of the connection between the first guide bar 40, the second guide bar 50, and the plate 10 can be increased through the integral molding structure, and production and assembly costs can be saved.

[0045] like Figure 2 and Figure 3 As shown, the line connecting the axis of inlet 20 and the axis of outlet 30 is L, and L is parallel to the length direction y of plate 10. This ensures optimized fluid path, allowing the refrigerant to cover the third channel 54 as much as possible after flowing from the second channel 53 through the second section 52 of the second guide bar 50. This maximizes the utilization of the heat exchange area of ​​the heat exchange plate 100 by the refrigerant, thereby improving its heat exchange performance.

[0046] In one embodiment, along the length direction y of the plate 10, the distance between the first sidewall 111 and the second sidewall 112 is D, and the length of the first guide bar 40 is D1, where D and D1 satisfy: 0.4D ≤ D1 ≤ 0.6D. It is understood that setting 0.4D ≤ D1 guides the refrigerant to flow along a longer path within the first channel 42, fully utilizing the heat exchange area of ​​the first channel 42. Simultaneously, setting D1 ≤ 0.6D prevents the first guide bar 40 from being too long, thus avoiding interference with the setting of the second guide bar 50 and the layout of the fluid channels. In other words, by setting the length of the first guide bar 40, the fluid path on the heat exchange plate 100 is optimized, ensuring that the heat exchange plate 100 has good heat exchange performance.

[0047] Here, the length D1 of the first guide strip 40 can be 0.4D, 0.45D, 0.5D, 0.55D, or 0.6D. Of course, it is not limited to these values; the actual value of the length D1 of the first guide strip 40 can be determined according to specific circumstances. In this embodiment, the length D1 of the first guide strip 40 is 0.5D.

[0048] like Figure 3 As shown, along the width direction x of the plate 10, the width of the first channel 42 is W1, the width of the second channel 53 is W2, and the width of the third channel 54 is W3. W1, W2, and W3 satisfy: W1 < W2 < W3. It can be understood that the refrigerant gradually generates more gas during heat exchange. By setting the gradient widths of the first channel 42, the second channel 53, and the third channel 54, the volume of refrigerant flowing through these channels gradually increases. This reduces the impact of gas on the smoothness of refrigerant flow, ensuring sufficient contact between the refrigerant and the plate 10, further optimizing the uniformity of fluid distribution on the heat exchange plate 100, and improving the heat exchange performance of the heat exchange plate.

[0049] In one embodiment, the first guide bar 40 has a third segment 43, a fourth segment 44 and a fifth segment 45 connected in sequence. The third segment 43 is connected to the first sidewall 111, and the fifth segment 45 forms a gap 41 with the second sidewall 112. The fourth segment 44 is inclined toward the third sidewall 113 from the end connected to the third segment 43 to the end connected to the fifth segment 45 relative to the width direction x of the plate 10. It is understandable that the inlet 20 is located in the first channel 42 near the first side wall 111, and the third section 43 is located in the fifth section 45 in the width direction x of the plate 10 away from the third side wall 113. This increases the width of the first channel 42 in the width direction x of the plate 10 at the third section 43, leaving space for the inlet 20. At the same time, it does not affect the width setting of the first channel 42, the second channel 53, and the third channel 54 in the width direction x of the plate 10. That is, by setting the third section 43, the fourth section 44, and the fifth section 45, the layout of the first guide bar 40 is optimized, ensuring that the refrigerant can smoothly enter the groove 11 of the heat exchange plate 100 while improving the heat exchange performance.

[0050] Please continue to refer to this. Figure 2 The end of the first section 51 that connects to the third sidewall 113 is called the connection end 511. The connection end 511 is located on the third sidewall 113 at a position one-third to three-quarters of the way along the length y of the plate 10 and away from the first sidewall 111. In this way, the inlet 20 and the outlet 30 can be separated, so that after the refrigerant enters the first channel 42 from the inlet 20, it will not flow directly to the outlet 30, but will flow to the second channel 53, thereby extending the fluid path, that is, increasing the utilization rate of the heat exchange area of ​​the heat exchange plate 100 and improving the heat exchange performance.

[0051] Here, the location of the connecting end 511 on the third sidewall 113 along the length y of the plate 10 and away from the first sidewall 111 can be one-third or three-quarters of the way along the length y of the plate 10. Of course, it is not limited to this; the actual location of the connecting end 511 on the third sidewall 113 along the length y of the plate 10 and away from the first sidewall 111 can be determined according to specific circumstances. In this embodiment, the connecting end 511 is located on the third sidewall 113 at the three-quarters-way position along the length y of the plate 10 and away from the first sidewall 111.

[0052] Furthermore, the first segment 51 includes a first rib 512 and a second rib 513. One end of the first rib 512 is connected to the third sidewall 113, and the other end extends along the width direction x of the plate 10 toward the fourth sidewall 114 and connects to one end of the second rib 513. The end of the second rib 513 away from the first rib 512 extends toward the fourth sidewall 114 and is inclined along the length direction y of the plate 10 away from the second sidewall 112. In this way, the refrigerant can be guided to flow from the third sidewall 113 to the fourth sidewall 114 by the first rib 512, and the inclined extension of the second rib 513 forms a gradual fluid turning path, allowing the refrigerant to smoothly transition to the length direction y of the plate 10, avoiding eddies or pressure losses caused by sharp bends, while increasing the coverage of the edge area of ​​the groove 11, further improving the utilization rate of the heat exchange area. In other embodiments, the first rib may also be arc-shaped, and the second rib 513 may be inclined and extended; or the first segment 51 may be arc-shaped, which can also extend the fluid path and improve the heat exchange performance.

[0053] It should be noted that, in the length direction y of the plate 10, the end of the second segment 52 extending toward the first sidewall 111 needs to exceed the end of the fifth segment 45 on the first guide bar 40 away from it and the fourth segment 44, that is, the second segment 52 can be parallel to the fifth segment 45 and form the second channel 53.

[0054] Please continue to refer to this. Figure 3 The second rib 513 has an inclination angle of θ relative to the width direction x of the plate 10, where 50°≤θ≤70°.

[0055] Here, the value of θ can be 50°, 55°, 60°, 65°, or 70°. Of course, it is not limited to these values; the actual value of θ can be determined according to specific circumstances. In this embodiment, the value of θ is 60°.

[0056] like Figure 4 and Figure 5As shown, the plate heat exchanger 200 also includes fins 201. The fins 201 are stacked on the bottom wall 115 of the groove 11 along the height z direction of the plate heat exchanger 200, and have clearance grooves 2011 for avoiding the first guide bar 40 and the second guide bar 50. In this embodiment, multiple heat exchange plates 100 are stacked, and the fins 201 are located between adjacent heat exchange plates 100. The shape of the clearance grooves 2011 is adapted to the first guide bar 40 and the second guide bar 50. The first guide bar 40 and the second guide bar 50 are located in the clearance grooves 2011, and the tops of the first guide bar 40 and the second guide bar 50 are welded and fixed to the adjacent heat exchange plates 100. By providing clearance grooves 2011 on the fins 201 to avoid the first guide bar 40 and the second guide bar 50, the fins 201 are facilitated in processing and forming, and the fit between the fins 201 and the heat exchange plate 100 is also facilitated. Furthermore, multiple flow guide grooves 2012 are provided on the fins 201, which are arranged at intervals along the length direction y of the plate 10. Thus, the flow guide grooves 2012 on the fins 201 increase the residence time of the refrigerant at its corresponding positions, thereby achieving sufficient heat exchange between the refrigerant and the heat exchange plate 100 and improving the overall heat exchange performance of the plate heat exchanger 200. In other embodiments, the first guide bar 40 and the second guide bar 50 can be formed on the fins 201 instead of being provided on the heat exchange plate 100, and the flow guide grooves 2012 on the fins 201 can be omitted.

[0057] In other embodiments, a third or fourth guide bar can be provided to further increase the fluid flow path, depending on the heat exchange requirements.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A heat exchange plate, comprising a plate body having a groove, wherein along the length direction of the plate body, the groove has a first sidewall and a second sidewall disposed opposite to each other, and along the width direction of the plate body, the groove has a third sidewall and a fourth sidewall disposed opposite to each other; and wherein the bottom wall of the groove has a through-hole inlet and an outlet, the inlet being disposed near the first sidewall and the outlet being disposed near the second sidewall; characterized in that, The heat exchange plate also includes: A first guide bar is disposed on the bottom wall of the groove and extends along the length direction of the plate. One end of the first guide bar is connected to the first side wall, and the other end forms a gap with the second side wall. In the width direction of the plate, a first channel is formed between the first guide bar and the third side wall, and the inlet is located in the first channel. The second guide bar is disposed on the bottom wall of the groove and includes a first section and a second section. The first section is located between the second side wall and the end of the first guide bar away from the first side wall, and separates the inlet from the outlet. One end of the first section is connected to the third side wall, and the other end extends towards the fourth side wall along the width direction of the plate. One end of the second section is connected to the first section, and the other end extends towards the first side wall along the length direction of the plate. The second section forms a second channel between the second guide bar and the first guide bar in the width direction of the plate, and a third channel between the second section and the fourth side wall. The first channel, the second channel, and the third channel are connected in sequence.

2. The heat exchange plate according to claim 1, characterized in that, Along the width direction of the plate, the width of the first channel is W1, the width of the second channel is W2, and the width of the third channel is W3. W1, W2, and W3 satisfy: W1 < W2 < W3.

3. The heat exchange plate according to claim 2, characterized in that, The line connecting the axis of the inlet and the axis of the outlet is L, and L is parallel to the length direction of the plate.

4. The heat exchange plate according to claim 2, characterized in that, Along the length of the plate, the distance between the first sidewall and the second sidewall is D, and the length of the first guide bar is D1. D and D1 satisfy: 0.4D≤D1≤0.6D.

5. The heat exchange plate according to claim 1 or 4, characterized in that, The end of the first segment that connects to the third sidewall is the connection end, and the connection end is located on the third sidewall at a position one-third to three-quarters away from the first sidewall along the length of the plate.

6. The heat exchange plate according to claim 1 or 4, characterized in that, The first segment includes a first rib and a second rib. One end of the first rib is connected to the third sidewall, and the other end extends along the width direction of the plate towards the fourth sidewall and is connected to one end of the second rib. The end of the second rib away from the first rib extends towards the fourth sidewall and is inclined along the length direction of the plate away from the second sidewall.

7. The heat exchange plate according to claim 6, characterized in that, The second rib is inclined at an angle θ relative to the width direction of the plate, where 50°≤θ≤70°.

8. The heat exchange plate according to claim 1, characterized in that, The first guide bar has a third segment, a fourth segment, and a fifth segment connected in sequence. The third segment is connected to the first sidewall, and the fifth segment forms the gap with the second sidewall. The fourth segment is inclined toward the third sidewall relative to the width direction of the plate, from the end connected to the third segment to the end connected to the fifth segment.

9. A plate heat exchanger, characterized in that, Includes the heat exchange plate according to any one of claims 1-8.

10. The plate heat exchanger according to claim 9, characterized in that, The plate heat exchanger further includes fins, which are stacked on the heat exchange plate along the height direction of the plate heat exchanger and have clearance grooves for avoiding the first guide bar and the second guide bar of the heat exchange plate; and the fins are also provided with a plurality of flow guide grooves, which are arranged at intervals along the length direction of the plate body.

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