Fin and heat exchanger

Abstract

Provided in the embodiments of the present application is a fin, comprising a plurality of heat exchange units, a plurality of first connection portions, and a plurality of second connection portions, wherein the plurality of heat exchange units are arranged in the direction of width of the fin, the first connection portions and the second connection portions are respectively connected to two adjacent heat exchange units, the height of the fin is defined as H, and the pitch of the heat exchange units in the direction of width of the fin is defined as λ, where H = 1.0-2.5 mm, λ = 0.5-4 mm, and λ / H = 0.20-2.54; or H = 2.5-5.5 mm, λ = 0.44-2.5 mm, and λ / H = 0.08-0.93, which facilitates an improvement in the heat exchange performance of the fin. Further provided in the present application is a heat exchanger comprising the fin described in the above solution, which facilitates an improvement in the heat exchange performance of the heat exchanger.

Description

A finned heat exchanger

[0001] This application claims priority to Chinese Patent Application No. 202410689127.2, filed on May 30, 2024, entitled "A Finned Heat Exchanger", and Chinese Patent Application No. 202410689127.3, filed on September 26, 2024, entitled "A Finned Heat Exchanger", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of heat exchange technology, specifically to a finned heat exchanger. Background Technology

[0003] The addition of fins to a heat exchanger increases the heat exchange area of ​​the heat exchange medium, thereby improving the heat exchange efficiency. A fin consists of multiple heat exchange units and multiple connecting parts, which connect adjacent heat exchange units. The heat exchange units are arranged along the width of the fin. If the heat exchange units are arranged too densely, the fins become difficult to manufacture; if the heat exchange units are arranged too sparsely, heat exchange is not conducive to heat exchange. Summary of the Invention

[0004] The purpose of this application is to provide a finned heat exchanger that improves the heat exchange performance of the heat exchanger.

[0005] To achieve the above objectives, one embodiment of this application adopts the following technical solution:

[0006] A fin includes multiple heat exchange units, multiple first connecting portions, and multiple second connecting portions. The multiple heat exchange units are arranged along the width direction of the fin. Each heat exchange unit includes multiple first sidewall portions and multiple second sidewall portions. The second connecting portions include a first edge portion. The first sidewall portions and the second sidewall portions are connected to the first edge portion. Along the width direction of the fin, the first sidewall portions are offset to one side relative to the first edge portion, and the second sidewall portions are offset to the other side relative to the first edge portion. Along the length direction of the fin, at least a portion of the first sidewall portions and the second sidewall portions are alternately arranged. Along the width direction of the fin, adjacent first sidewall portions are... A first window is provided between the wall portion and the second side wall portion. The opening direction of the first window forms an angle of less than 90° with the length direction of the fin. The first connecting portion and the second connecting portion are respectively connected to two adjacent heat exchange units. The height of the fin is H. Along the width direction of the fin, the distance between the center lines of adjacent first connecting portions or adjacent second connecting portions is defined as λ. The height of the fin H = 1.0~2.5mm, the λ = 0.5~4mm, and λ / H = 0.20~2.54, or the height of the fin H = 2.5~5.5mm, the λ = 0.44~2.5mm, and λ / H = 0.08~0.93.

[0007] In one embodiment provided in this application, the fin includes multiple heat exchange units, multiple first connecting portions, and multiple second connecting portions. The multiple heat exchange units are arranged along the width direction of the fin. Since the first sidewall portion is offset to one side relative to the first edge, and the second sidewall portion is offset to the other side relative to the first edge, at least a portion of the first sidewall portion and the second sidewall portion are alternately arranged along the length direction of the fin. Compared to an arrangement with equal offset, this increases the flow cross-sectional area of ​​the first window without increasing the fin thickness, facilitating the flow of the medium between the first and second sidewall portions and increasing the heat exchange efficiency between the medium and the fin. The first connecting portions and second connecting portions connect adjacent heat exchange units respectively. The height of the fin is H, and the distance between the center lines of adjacent first connecting portions or adjacent second connecting portions along the width direction of the fin is λ. The height H = 1.0–2.5 mm, λ = 0.5–4 mm, and λ / H = 0.20–2.54. Since a smaller λ results in a smaller distance between adjacent first or second connecting parts, meaning the heat exchange units are arranged more densely, the more heat exchange units can be set up, the larger the heat exchange area of ​​the fins, and the better the heat exchange performance of the fins, all while keeping the fin width and height constant. However, a smaller λ and denser fins, coupled with a larger H, increase the manufacturing difficulty of the fins. Therefore, the ratio of λ to H is limited to 0.20–2.54, or H = 2.5–5.5 mm, λ = 0.44–2.5 mm, and λ / H = 0.08–0.93. Controlling the ratio of λ to H to prevent it from being too large helps improve the heat exchange performance of the fins, while controlling the ratio to H to prevent it from being too small helps reduce the manufacturing difficulty of the fins. The ratio of λ to H is limited to between 0.08 and 2.54 to improve the heat exchange performance of the fins while ensuring the feasibility of fin manufacturing. When λ / H is between 0.20 and 2.54, the heat exchange units can be arranged more densely, the heat exchange surface of the fins is increased, and the fins have a good turbulence effect on the primary fluid, resulting in good heat exchange efficiency. When λ / H is between 0.08 and 0.9, the heat exchange surface of the fins is increased, the fin turbulence effect is good, and the fin forming difficulty is low, which helps to ensure the strength of the fins.

[0008] A heat exchanger includes multiple plates and multiple fins, wherein the plates are stacked and fins are provided between adjacent plates. Each fin includes multiple heat exchange units, multiple first connecting portions, and multiple second connecting portions. The heat exchange units are arranged along the width direction of the fins. The first connecting portions connect two adjacent heat exchange units, and the second connecting portions connect two adjacent heat exchange units. Along the height direction of the heat exchange units, one side of the first connecting portion is connected to the plate, and the other side of the first connecting portion is connected to the heat exchange unit. One side of the heat exchange unit is connected to the first connecting portion, and the other side of the heat exchange unit is connected to the second connecting portion. The second connecting portion is connected to the plate. The height of the fins is H. Along the width direction of the fins, the distance between the center lines of adjacent first connecting portions or adjacent second connecting portions is defined as λ. The ratio of λ to H is 0.08 to 2.54.

[0009] This application also provides a heat exchanger including the fins described above. The heat exchanger has fins, each fin comprising multiple heat exchange units, multiple first connecting portions, and multiple second connecting portions. The multiple heat exchange units are arranged along the width direction of the fins. The first connecting portions and second connecting portions connect adjacent heat exchange units. The height of the fin is H. Along the width direction of the fin, the distance between the center lines of adjacent first connecting portions or adjacent second connecting portions is λ. The ratio of λ to H is between 0.08 and 2.54. Since a smaller λ results in a smaller distance between adjacent first connecting portions or adjacent second connecting portions, the heat exchange units are arranged more densely within the heat exchanger. With the width and height between adjacent plates remaining constant, the more densely the heat exchange units are arranged, the more heat exchange units can be set, the larger the heat exchange area of ​​the fins, the better the heat exchange performance of the fins, and the better the heat exchange performance of the heat exchanger. However, the smaller the λ and the denser the fins, the more difficult it is to manufacture the fins. Therefore, the ratio of λ to H is limited to between 0.08 and 2.54. Controlling the ratio of λ to H to prevent it from being too large is beneficial to improving the heat exchange performance of the fins, while controlling the ratio of λ to H to prevent it from being too small is beneficial to reducing the manufacturing difficulty of the fins. Limiting the ratio of λ to H to between 0.08 and 2.54 improves the heat exchange performance of the heat exchanger while ensuring the feasibility of fin manufacturing. Attached Figure Description

[0010] Figure 1 is a three-dimensional structural schematic diagram of the heat exchanger provided in this application from one perspective;

[0011] Figure 2 is a cross-sectional view of the partially exploded structure of the heat exchanger in Figure 1 along plane AA.

[0012] Figure 3 is a perspective view of the three-dimensional structure of the first embodiment of the fins in Figure 2.

[0013] Figure 4 is an enlarged structural diagram of part A in Figure 3;

[0014] Figure 5 is a front view schematic diagram of the structure of the fin in the third layer;

[0015] Figure 6 is an enlarged structural diagram of part B in Figure 5;

[0016] Figure 7 is an enlarged structural diagram of part B in Figure 5;

[0017] Figure 8 is a schematic diagram of the right-side structure of the fin in the third layer;

[0018] Figure 9 is a perspective view of a three-dimensional structural schematic diagram of a second embodiment of the fins provided in this application;

[0019] Figure 10 is a front view schematic diagram of the fin structure in Figure 9. Detailed Implementation

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

[0021] Referring to Figures 1 and 2, this application provides a heat exchanger 101, which includes multiple plates 3. The multiple plates 3 are stacked to form a first inter-plate channel S1 for the flow of a first fluid and a second inter-plate channel S2 for the flow of a second fluid. In this embodiment, the first fluid refers to refrigerant and the second fluid refers to cooling water. The first fluid and the second fluid exchange heat within the heat exchanger 101. In other embodiments, the first fluid may also refer to cooling water, and the second fluid may also refer to cooling water; or the first fluid may refer to cooling water and the second fluid may refer to cooling oil. In this embodiment, the first inter-plate channel S1 and the second inter-plate channel S2 are alternately arranged along the stacking direction of the plates 3, thus achieving good heat exchange effect between the first fluid and the second fluid. In other embodiments, two first inter-plate channels S1 may be arranged consecutively before the second inter-plate channel S2 is arranged.

[0022] In this embodiment, the heat exchanger 101 includes multiple fins 100, which are located between adjacent plates 3. The two sides of the fins 100 are welded and fixed to the adjacent plates 3 respectively. The fins 100 are used to increase the heat exchange area of ​​the first fluid and the second fluid, thereby improving the heat exchange effect of the heat exchanger 101. Of course, in other embodiments, the fins 100 and the plates 3 can also be fixed by means of bonding or other methods.

[0023] Referring to Figures 3-8, a first embodiment of the fin is illustrated. The fin 100 includes multiple heat exchange units 1, multiple first connecting portions 2, and multiple second connecting portions 12. The multiple heat exchange units 1 are arranged along the width direction of the fin 100. The first connecting portions 2 and the second connecting portions 12 respectively connect adjacent heat exchange units 1. In this embodiment, the first connecting portion 2 and the heat exchange unit 1 are an integral structure. Along the height direction of the fin 100, one end of the heat exchange unit 1 is connected to the second connecting portion 12, and at least some of the other ends of the heat exchange unit 1 are connected to the first connecting portion 2. The height of the fin 100 is H. Along the width direction of the fin 100, the distance between the center lines of adjacent first connecting portions 2 or adjacent second connecting portions 12 is defined as λ. The ratio of λ to H is 0.08 to 2.54, including 0.08 and 2.54. The smaller λ is, the more densely the heat exchange units 1 are arranged, the more heat exchange units 1 can be set, the larger the heat exchange area of ​​fins 100, the better the turbulence effect of fins 100 on the fluid, and the better the heat exchange performance of fins 100. However, if H is large while λ is small, fins 100 are difficult to manufacture. Therefore, the values ​​of H and λ need to be changed simultaneously. This helps to ensure the high performance of fins 100 while also facilitating manufacturing. In this embodiment, the ratio of λ to H is between 0.08 and 2.54, which helps to improve the heat exchange performance of fins 100 and reduces manufacturing difficulty, thus improving the heat exchange efficiency of heat exchanger 101. For ease of description, "up" and "down" are defined as the up and down directions in Figure 3 of the specification drawings, where "up" and "down" only indicate relative positions. The length direction of fins 100 refers to the main flow direction of the fluid, and the height direction of heat exchanger 101 is consistent with the stacking direction of plates 3. The height direction of fins 100 is consistent with the height direction of heat exchanger 101.

[0024] Referring to Figure 3, in this embodiment, the second connecting portion 12 and the first connecting portion 2 are arranged substantially parallel, which includes parallel and approximately parallel. Along the height direction of the fin 100, the second connecting portion 12 and the first connecting portion 2 are offset. A second surface is defined, which is perpendicular to the height direction of the fin 100. The offset arrangement means that the projections of the second connecting portion 12 and the first connecting portion 2 on the second surface do not coincide.

[0025] Referring to Figures 3, 4, and 6, the second connecting portion 12 includes a first connecting segment 121, a first side portion 122, and a second side portion 123. The first connecting segment 121 is located between the first side portion 122 and the second side portion 123, and both the first side portion 122 and the second side portion 123 are inclined relative to the first connecting segment 121. In this embodiment, the first side portion 122 and the second side portion 123 are generally arc-shaped, which facilitates the processing of the fin 100. The first connecting segment 121 is generally planar, which facilitates the welding of the fin 100 with other structures and helps to increase the welding area. Other structures can be plates 3. Of course, in other embodiments, the first side portion 122 and the second side portion 123 can also be generally planar, and the first connecting segment 121 can also be generally arc-shaped.

[0026] Referring to Figures 3, 4, and 6, the heat exchange unit 1 includes multiple first sidewall portions 111 and multiple second sidewall portions 112. The second connecting portion 12 includes a first side portion 122. The first sidewall portions 111 and the second sidewall portions 112 are connected to the first side portion 122. Along the width direction of the fin 100, the first sidewall portions 111 are offset to one side relative to the first side portion 122, and the second sidewall portions 112 are offset to the other side relative to the first side portion 122. The first sidewall portions 111 and the second sidewall portions 112 are approximately bridge-shaped. Along the main flow direction, the first sidewall portions 111 and the second sidewall portions 112 are alternately arranged. In this embodiment, along the width direction of the fin 100, the first sidewall portion 111 and the second sidewall portion 112 are offset in opposite directions relative to the first edge portion 122. A first window 131 is provided between adjacent first sidewall portions 111 and second sidewall portions 112, facing the length direction of the fin 100. The opening direction of the first window 131 forms an angle of less than 90° with the length direction of the fin 100, and the first window 131 allows fluid flow. Of course, in other embodiments, two or more first sidewall portions 111 can be arranged consecutively before the second sidewall portion 112 is arranged.

[0027] Referring to Figures 3, 4 and 6, the first connecting part 2 includes a second connecting segment 21, a third side 22 and a fourth side 23. The second connecting segment 21 is located between the first side 122 and the second side 123. The shape of the first connecting part 2 is basically the same as that of the second connecting part 12, and will not be described in detail here.

[0028] In this embodiment, the fin 100 further includes a first foot 15 and a second foot 16. Along the width direction of the fin 100, the first foot 15 and the second foot 16 are located on the two outermost sides of the fin 100, respectively. The first foot 15 is connected to the leftmost heat exchange unit 1, and the second foot 16 is connected to the rightmost heat exchange unit 1. In this embodiment, the shape of the first foot 15 is consistent with the shape to the right of the center line of the first connecting portion 2, and the shape of the second foot 16 is consistent with the shape to the right of the center line of the first connecting portion 2. The shape of the first foot 15 and the second foot 16 joined together is the same as that of the first connecting portion 2. In other embodiments, the fin may also exclude the first foot 15 and the second foot 16.

[0029] Referring to Figures 3, 4, and 6, the first sidewall portion 111 includes a first body 1111, a first segment 1112, and a second segment 1113. The first body 1111, the first segment 1112, and the second segment 1113 are an integral structure. The first body 1111 is located between the first segment 1112 and the second segment 1113. One end of the first body 1111 is connected to the first segment 1112, and the other end of the first body 1111 is connected to the second segment 1113. The first segment 1112 is connected to the first side portion 122 of the second connecting portion 12, and the second segment 1113 is connected to the fourth side portion 23 of the first connecting portion 2.

[0030] Referring to Figures 3, 4, and 6, in this embodiment, the first body 1111 extends along the height direction of the fin 100. The first body 1111 is generally planar, and both the first segment 1112 and the second segment 1113 are inclined relative to the first body 1111. The first segment 1112 and the second segment 1113 are inclined on the same side of the first body 1111 towards the width direction of the fin 100, and are respectively inclined in opposite directions relative to the first body 1111 towards the height direction of the fin 100. In this embodiment, both the first segment 1112 and the second segment 1113 are set at an angle to the first body 1111, and the angle is an obtuse angle. In other embodiments, the angle can also be approximately a right angle. The first segment 1112 is inclined to the upper right relative to the first body 1111, and the second segment 1113 is inclined to the lower right relative to the first body 1111. Of course, in other embodiments, the first body 1111 may also have one or more curved surface segments, or the first body 1111 may also be wavy.

[0031] Referring to Figures 3, 4, and 6, in this embodiment, along the width direction of the fin 100, the second sidewall portion 112 and the first sidewall portion 111 are located on both sides of the first side portion 122, and the second sidewall portion 112 and the first sidewall portion 111 are located on both sides of the second side portion 123. The second sidewall portion 112 includes a second body 1121, a third segment 1122, and a fourth segment 1123. The second body 1121, the third segment 1122, and the fourth segment 1123 are an integral structure. The second body 1121 is located between the third segment 1122 and the fourth segment 1123. One end of the second body 1121 is connected to the third segment 1122, and the other end of the second body 1121 is connected to the fourth segment 1123. The third segment 1122 is connected to the first side portion 122 of the second connecting portion 12, and the fourth segment 1123 is connected to the fourth side portion 23 of the first connecting portion 2.

[0032] Referring to Figures 3, 4, and 6, in this embodiment, the second body 1121 extends along the height direction of the fin 100 and is generally planar. The third segment 1122 and the fourth segment 1123 are both inclined relative to the first body 1111. In this embodiment, the third segment 1122 and the fourth segment 1123 are both angled to the second body 1121, and the angle is obtuse. In other embodiments, the angle may be approximately right angle. Along the width direction of the fin 100, the third segment 1122 and the first segment 1112 are inclined to opposite sides relative to the first side 22, and the fourth segment 1123 and the second segment 1113 are inclined to opposite sides relative to the third side 22. In this embodiment, the third segment 1122 and the fourth segment 1123 are inclined relative to the second body 1121 on the same side facing the width direction of the fin 100, and the third segment 1122 and the fourth segment 1123 are respectively inclined relative to the second body 1121 on opposite sides facing the height direction of the fin 100. In this embodiment, the third segment 1122 is inclined to the upper left relative to the second body 1121, and the fourth segment 1123 is inclined to the lower left.

[0033] Of course, in other embodiments, the second body 1121 may also have one or more curved surface segments, or the second body 1121 may also be wavy.

[0034] Referring to Figures 3, 4, and 6, the heat exchange unit 1 includes a third sidewall portion 113 and a fourth sidewall portion 114. The second connecting portion 12 includes a second side portion 123. The third sidewall portion 113 and the fourth sidewall portion 114 are connected to the second side portion 123. Along the width direction of the fin 100, the third sidewall portion 113 is offset to one side relative to the second side portion 123, and the fourth sidewall portion 114 is offset to the other side relative to the second side portion 123. The third sidewall portion 113 and the fourth sidewall portion 114 are approximately bridge-shaped. Along the main flow direction, the third sidewall portion 113 and the fourth sidewall portion 114 are alternately arranged. In this embodiment, along the width direction of the fin 100, the third sidewall portion 113 and the fourth sidewall portion 114 are offset in opposite directions relative to the second side portion 123. A second window 132 is provided between adjacent third sidewall portions 113 and fourth sidewall portions 114, facing the length direction of the fin 100. The opening direction of the second window 132 forms an angle of less than 90° with the length direction of the fin 100, allowing fluid to flow through. Of course, in other embodiments, two or more third sidewall portions 113 can be arranged consecutively before the fourth sidewall portion 114 is arranged. In this embodiment, the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 are collectively referred to as sidewall portions 11, and the first window 131 and the second window 132 are collectively referred to as window 13.

[0035] Referring to Figures 3, 4, and 6, in this embodiment, the third sidewall portion 113 includes a third body 1131, a fifth segment 1132, and a sixth segment 1133. The third body 1131 is located between the fifth segment 1132 and the sixth segment 1133. Both the fifth segment 1132 and the sixth segment 1133 are inclined relative to the third body 1131. The fifth segment 1132 is connected to the second side 123 of the second connecting portion 12, and the sixth segment 1133 is connected to the third side 22 of the first connecting portion 2. In this embodiment, the third sidewall portion 113 and the first sidewall portion 111 have basically the same shape, and the structure of the third sidewall portion 113 will not be described in detail here.

[0036] Referring to Figures 3, 4, and 6, in this embodiment, the fourth sidewall portion 114 includes a fourth body 1141, a seventh segment 1142, and an eighth segment 1143. The fourth body 1141 is located between the seventh segment 1142 and the eighth segment 1143. Both the seventh segment 1142 and the eighth segment 1143 are inclined relative to the fourth body 1141. The seventh segment 1142 is connected to the second side 123 of the second connecting portion 12, and the eighth segment 1143 is connected to the third side 22 of the first connecting portion 2. In this embodiment, the fourth sidewall portion 114 and the second sidewall portion 112 have basically the same shape, and the structure of the fourth sidewall portion 114 will not be described in detail here.

[0037] Referring to Figures 3, 6, and 8, in this embodiment, along the width direction of the fin 100, the first sidewall portion 111 and the third sidewall portion 113 are aligned and offset in the same direction, with a gap between them for fluid flow. Similarly, the second sidewall portion 112 and the fourth sidewall portion 114 are aligned and offset in the same direction, with a gap between them for fluid flow. In this embodiment, a third surface is defined, perpendicular to the width direction of the fin 100. The orthographic projection of the first sidewall portion 111 onto the third surface coincides with the orthographic projection of the third sidewall portion 113 onto the third surface, and the orthographic projection of the third sidewall portion 113 onto the third surface coincides with the orthographic projection of the fourth sidewall portion 114 onto the third surface. In this embodiment, along the width direction of the fin 100, the inclination of the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 is basically the same, and the width of the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 is the same, so the fluid distribution is uniform.

[0038] Referring to Figures 4 and 6-7, the heat exchange unit 1 includes a main flow channel 14, which is arranged along the length of the fins 100. The main flow channel 14 includes gaps between adjacent heat exchange units 1, gaps between the first sidewall portion 111 and the fourth sidewall portion 114, and gaps between the second sidewall portion 112 and the third sidewall portion 113. The first window 131 and the second window 132 are connected to the main flow channel 14. Fluid can flow from the main flow channel 14 to the first window 131 or the second window 132, and enter the main flow channel 14 through the first window 131 or the second window 132. The arrangement of the first window 131 and the second window 132 helps to increase the flow path of the fluid and improve the heat exchange effect of the heat exchanger 101.

[0039] Of course, in other embodiments, at least two of the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 may have different widths.

[0040] Of course, in other embodiments, at least two of the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 may have different degrees of inclination.

[0041] Referring to Figure 7, the distance between the top of the second connecting portion 12 and the bottom of the first connecting portion 2 along the height direction of the fin 100 is H, where H is the height of the fin 100. The distance between two adjacent second connecting portions 12 along the width direction of the fin 100 is λ, where λ refers to the distance between the center lines of two adjacent second connecting portions 12. The Z direction in Figure 3 indicates the center line of the second connecting portion 12, and λ is the period of the heat exchange unit 1. The smaller λ is, the more densely the heat exchange units 1 are arranged, and the better the turbulence effect of the fin 100 on the fluid. If λ decreases while H is large, the fin 100 becomes difficult to manufacture. Therefore, the values ​​of H and λ need to be changed synchronously. This helps ensure the high performance of the fin 100 while also facilitating its manufacture. In this embodiment, the ratio of λ to H is between 0.08 and 2.54, resulting in good performance of the fin 100 and low manufacturing difficulty.

[0042] When the viscosity of the fluid inside the heat exchanger 101 is low, for example, R744, H = 1.0~2.5mm, λ = 0.5~4mm, λ / H = 0.20~2.54 (including 0.20 and 2.54), the height of the fins 100 is small, and the heat exchanger 101 is relatively compact. At the same time, with λ / H between 0.20 and 2.54, the heat exchange units 1 can be set more densely, the heat exchange surface of the fins 100 is increased, and the fins 100 have a good turbulence effect on the first fluid, so the heat exchanger 101 also has a good heat exchange effect.

[0043] When the viscosity of the fluid inside heat exchanger 101 is high, such as cooling oil, H = 2.5–5.5 mm, λ = 0.44–2.5 mm, and λ / H = 0.08–0.93, the high viscosity of the first fluid and the large value of H are beneficial for reducing the flow resistance of the first fluid. At the same time, the small λ is beneficial for increasing the density of heat exchange unit 1, and the fins 100 have a good turbulence effect on the first fluid. When λ / H is between 0.08 and 0.9, the heat exchange surface increased by the fins 100 is large, the turbulence effect of the fins 100 is good, and the forming difficulty of the fins 100 is low, which is beneficial for ensuring the strength of the fins 100.

[0044] The λ / H of fin 100 can be selected according to the viscosity of the fluid. The size of fin 100 can be the same or different for the first fluid or the second fluid. Here, the size of fin 100 refers to the λ / H value.

[0045] Referring to Figure 7, along the height direction of the fin 100, the height of the first sidewall portion 111 is h, where h is the height between the connection point of the first sidewall portion 111 and the first edge portion 122 and the connection point of the first sidewall portion 111 and the second edge portion 123. The heights of the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 are also h. In this embodiment, the ratio of h to H is between 0.4 and 0.9, including 0.4 and 0.9. When the ratio of h to H is greater than 0.9, the height ratio occupied by the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 is too large, making the fin 100 difficult to manufacture and its strength difficult to guarantee. When the ratio of h to H is less than 0.4, the heights of the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114 are small, resulting in a small heat exchange area for the fin 100. In this embodiment, the ratio of h to H is between 0.4 and 0.9, so that the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113 and the fourth sidewall portion 114 can be set relatively high, increasing the heat exchange area and improving the performance of the fin 100. In addition, the first window 131 and the second window 132 can also be set relatively large, resulting in a large first fluid flow rate, which is also beneficial to improving heat exchange.

[0046] Referring to Figure 7, in this embodiment, the main flow channel 14 includes a first channel 141. The wall forming the first channel 141 includes a second connecting portion 12, a first side wall portion 111, a fourth side wall portion 114, and a plate 3 welded to the fin 100. The first channel 141 includes a gap between the first side wall portion 111 and the fourth side wall portion 114, and a gap between the second side wall portion 112 and the third side wall portion 113. The flow area of ​​the first channel 141 is A1. A first surface is defined as perpendicular to the length direction of the fin 100. The flow area A1 of the first channel 141 refers to the area of ​​the orthographic projection of the first channel 141 onto the first surface. In this embodiment, the first window 131 and the second window 132 are the same size. The wall forming the first window 131 includes the first side wall portion 111 and the second side wall portion 112. The flow area of ​​the first window 131 is A2, which refers to the area of ​​the orthographic projection of the first window 131 onto the first surface. By adjusting the ratio of A1 to A2, the flow rate distribution of the fluid can be adjusted, that is, the flow rate of the fluid entering the first channel 141 and the first window 131 can be controlled. In this embodiment, the ratio of A1 to A2 can be adjusted by controlling the distance between the first sidewall portion 111 and the fourth sidewall portion 114 along the width direction of the fin 100.

[0047] Referring to Figures 6 and 7, the first channel 141 includes a sub-channel 1411. The sub-channel 1411 is close to the lower part of the fin 100. The wall forming the sub-channel 1411 includes the walls of two adjacent first connecting parts 2, the second section 1113 and the eighth section 1143. The presence of the sub-channel 1411 makes the area of ​​the first channel 141 larger.

[0048] Referring to Figure 7, in this embodiment, near the second connecting portion 12, along the length direction of the fin 100, the distance between the connection point of the first body 1111 and the first segment 1112 and the connection point of the fourth body 1141 and the seventh segment 1142 is 'a'. Near the first connecting portion 2, along the length direction of the fin 100, the distance between the connection point of the first body 1111 and the second segment 1113 and the connection point of the fourth body 1141 and the eighth segment 1143 is 'b'.

[0049] In this embodiment, the ratio of a to b is between 0.64 and 1.14, including 0.64 and 1.14. This allows the ratio of A1 to A2 to be controlled between 0.73 and 1.35. The values ​​of A1 and A2 are close, which helps to make the flow rate of fluid through the first channel 141 and the first window 131 relatively uniform, and helps to improve the uniformity of fluid distribution.

[0050] In addition, when the ratio of a to b is equal to 1, the first body 1111 is vertically arranged along the height direction of the fin 100, and the fourth body 1141 is vertically arranged along the height direction of the fin 100, which facilitates the forming of the fin 100.

[0051] Referring to Figures 3 and 7, one end of the first segment 1112 is connected to the first body 1111, and the other end of the first segment 1112 is connected to the first side 122 of the second connecting portion 12. The first segment 1112 extends from the first body 1111 toward the first side 122. One end of the second segment 1113 is connected to the first body 1111, and the other end of the second segment 1113 is connected to the fourth side 23 of the first connecting portion 2. The second segment 1113 extends from the first body 1111 toward the fourth side 23. One end of the seventh segment 1142 is connected to the fourth body 1141, and the other end of the seventh segment 1142 is connected to the second side 123 of the second connecting portion 12. The seventh segment 1142 extends from the fourth body 1141 toward the second side 123. One end of the eighth segment 1143 is connected to the fourth body 1141, and the other end of the eighth segment 1143 is connected to the third side 22 of the first connecting part 2. The eighth segment 1143 extends from the fourth body 1141 toward the third side 22.

[0052] When the ratio of a to b is equal to 1, the extension length of the first segment 1112 is smaller than the extension length of the second segment 1113, and the extension length of the eighth segment 1143 is smaller than the extension length of the seventh segment 1142. This helps to reduce the difference in flow area between the first channel 141 and the first window 131, thereby helping to make the flow distribution of fluid in the first channel 141, the first window 131, and the second window 132 relatively uniform, which helps to improve the uniformity of fluid distribution.

[0053] When the ratio of a to b is between 1 and 1.14, the first body 1111 is inclined along the height direction of the fin 100, and the fourth body 1141 is inclined along the height direction of the fin 100. The first body 1111 and the fourth body 1141 are roughly V-shaped, with the larger opening of the V facing the second connecting part 12. This is beneficial to make the flow area of ​​the first channel 141 and the first window 131 similar, so that the flow rate of the fluid in the first channel 141, the first window 131 and the second window 132 can be evenly distributed.

[0054] When the ratio of a to b is between 0.64 and 1, the first body 1111 is inclined along the height direction of the fin 100, and the fourth body 1141 is also inclined along the height direction of the fin 100. The first body 1111 and the fourth body 1141 are roughly V-shaped, with the larger opening of the V-shape facing away from the second connecting part 12. This helps to reduce the flow resistance of the fluid along the length direction of the fin 100. When the ratio of a to b is between 0.64 and 1, the extension lengths of the second segment 1113 relative to the first segment 1112 are similar, and the extension lengths of the eighth segment 1143 and the seventh segment 1142 are similar. This helps to improve the consistency of strength between the second segment 1113 and the first segment 1112, and between the eighth segment 1143 and the seventh segment 1142. When the ratio of a to b is between 0.64 and 1, this also helps to make the flow rate of the fluid in the first channel 141, the first window 131, and the second window 132 relatively uniform, resulting in uniform fluid distribution.

[0055] Referring to Figure 8, along the width direction of the fin 100, the widths of the leftmost and rightmost first sidewalls 111 are also smaller, which reduces the resistance to fluid flow into the fin 100. In other embodiments, the widths of the plurality of first sidewalls 112 can be consistent, and the widths of the plurality of third sidewalls 113 can also be consistent.

[0056] Referring to Figures 3 and 8, along the main flow direction, the width of the first sidewall portions 111 on both sides closer to the main flow direction is smaller than the width of the first sidewall portions 111 on both sides farther from the main flow direction. The widths of the leftmost and rightmost first sidewall portions 111 are smaller than the width of the first sidewall portion 111 in the middle region. This reduces the resistance to fluid inflow and outflow from the fins 100. Of course, in other embodiments, the widths of the leftmost and rightmost first sidewall portions 111 can also be equal to the width of the first sidewall portion 111 in the middle region.

[0057] Referring to Figures 3 and 8, in this embodiment, the widths of the multiple first sidewall portions 111 on both sides away from the main flow direction are the same. Along the width direction of the fin 100, the first sidewall portions 111 and third sidewall portions 113 are correspondingly arranged, and their widths are also the same. In this embodiment, along the width direction of the fin 100, the widths of the multiple third sidewall portions 113 are the same, and the widths of the multiple fourth sidewall portions 114 are the same. The widths of the third sidewall portions 113 and fourth sidewall portions 114 are also the same. In this embodiment, the widths of the first sidewall portions 111 and third sidewall portions 113 on both sides away from the main flow direction are consistent, which facilitates uniform fluid distribution. Referring to Figures 3 and 8, along the main flow direction, the width of the first sidewall portion 111 on both sides away from the main flow direction is w, the width of the second sidewall portion 112 on both sides away from the main flow direction is also w, and the widths of the third sidewall portion 113 and the fourth sidewall portion 114 are also w. This simplifies the structure of the fin 100 and facilitates processing. The smaller w is, the more numerous the first sidewall portion 111, second sidewall portion 112, third sidewall portion 113, and fourth sidewall portion 114 are along the main flow direction, resulting in more fluid turbulence and a better heat transfer effect. However, the smaller w is, the greater the fluid pressure drop and the greater the fluid flow resistance. Reducing the flow resistance requires increasing the period λ of the heat exchange unit 1, and a large λ will affect heat transfer.

[0058] In this embodiment, w / λ = 0.36 to 3.7, including 0.36 and 3.7. This allows for a greater number of first sidewall portions 111, second sidewall portions 112, third sidewall portions 113, and fourth sidewall portions 114, enhancing the heat exchange effect of the fins 100, while also reducing fluid flow resistance. w can be set to 0.45 to 3.54 mm, including 0.45 mm and 3.54 mm.

[0059] Of course, in other embodiments, the widths of the first sidewall portion 111 and the third sidewall portion 113 provided along the width direction of the fin 100 may be different, and the widths of the second sidewall portion 112 and the fourth sidewall portion 111 provided may also be different.

[0060] In another embodiment, at least two of the plurality of first sidewall portions 111 on both sides away from the main flow direction may have different widths, at least two of the plurality of second sidewall portions 112 on both sides away from the main flow direction may have different widths, at least two of the plurality of third sidewall portions 113 may have different widths, and at least two of the plurality of fourth sidewall portions 114 may have different widths.

[0061] Referring to Figures 3 and 7, the fin 100 is formed by rolling or stamping a plate, and the material thickness of the plate forming the fin 100 is δ. Along the height direction of the fin 100, the height of the first connecting part 2 is c, where c is the height distance between the bottom of the first connecting part 2 and the connection point between the first connecting part 2 and the second sidewall part 112. If the c / δ ratio is too small, the fin 100 is difficult to manufacture; if the c / δ ratio is too large, the flow area of ​​the sub-channel 1411 will be large, which will easily lead to uneven fluid flow between the first channel 141 and the first window 131, which is not conducive to heat exchange.

[0062] In this embodiment, c / δ = 2.3 to 4.7, including 2.3 and 4.7, so that the fin 100 is easy to manufacture and the flow area of ​​the opening is suitable, so that the fluid flow of the first channel 141 and the first window 131 is uniform, which is beneficial to heat exchange.

[0063] In this embodiment, the height of the second connecting portion 12 is also c, thus simplifying the structure of the fin 100. Furthermore, along the width direction of the fin 100, there is a gap between adjacent second connecting portions 12. The ratio of the plate material thickness δ to the height c of the second connecting portion 12 is between 2.3 and 4.7. This helps to reduce the gap between adjacent second connecting portions 12, thereby reducing the gap between adjacent heat exchange units 1, which also helps to improve the uniformity of fluid distribution.

[0064] Of course, in other embodiments, the height of the first connecting part 2 may not be equal to c, that is, the heights of the first connecting part 2 and the second connecting part 12 may be different.

[0065] In some embodiments, in order to further increase the heat exchange effect of the fins, protrusions or grooves may be provided on the first sidewall portion 111, the second sidewall portion 112, the third sidewall portion 113, and the fourth sidewall portion 114. The protrusions include dot waves and herringbone waves.

[0066] Referring to Figures 9 and 10, a second embodiment of the fin 100 is illustrated. Along the width direction of the fin 100, the first sidewall portion 111 and the third sidewall portion 113 are offset in opposite directions relative to the second connecting portion 12, the second sidewall portion 112 and the fourth sidewall portion 114 are offset in opposite directions, the first sidewall portion 111 and the second sidewall portion 112 are offset in opposite directions relative to the first edge portion 122, and the third sidewall portion 113 and the fourth sidewall portion 114 are also offset in opposite directions relative to the second edge portion 123. In this embodiment, the first sidewall portion 111 is offset to the right relative to the first edge portion 122, the second sidewall portion 112 is offset to the left relative to the first edge portion 122, the third sidewall portion 113 is offset to the left relative to the second edge portion 123, and the fourth sidewall portion 114 is offset to the left relative to the second edge portion 123.

[0067] 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.

[0068] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and controls without departing from the concept of the present invention, and these modifications and controls all fall within the scope of protection of the present invention.

Claims

1. A fin (100), characterized in that, The fin includes multiple heat exchange units (1), multiple first connecting portions (2), and multiple second connecting portions (12). The multiple heat exchange units (1) are arranged along the width direction of the fin (100). Each heat exchange unit (1) includes multiple first sidewall portions (111) and multiple second sidewall portions (112). Each second connecting portion (12) includes a first edge portion (122). The first sidewall portions (111) and the second sidewall portions (112) are connected to the first edge portion (122). Along the width direction of the fin (100), the first sidewall portion (111) is offset to one side relative to the first edge portion (122), and the second sidewall portion (112) is offset to the other side relative to the first edge portion (122). Along the length direction of the fin (100), at least a portion of the first sidewall portion (111) and the second sidewall portion (112) are alternately arranged. In the width direction of the fin (100), there is a first window (131) between adjacent first sidewall portion (111) and second sidewall portion (112). The opening direction of the first window (131) is at an angle of less than 90° with the length direction of the fin (100). The first connecting portion (2) and the second connecting portion (12) are respectively connected to two adjacent heat exchange units (1). The height of the fin (100) is H. Along the width direction of the fin (100), the distance between the center line of adjacent first connecting portion (2) or the center line of adjacent second connecting portion (12) is defined as λ. The height of the fin (100) H = 1.0~2.5mm, the λ = 0.5~4mm, and λ / H = 0.20~2.54, or the height of the fin (100) H = 2.5~5.5mm, the λ = 0.44~2.5mm, and λ / H = 0.08~0.

93.

2. The fin (100) according to claim 1, characterized in that, The heat exchange unit (1) includes a third sidewall portion (113) and a fourth sidewall portion (114). The second connecting portion (12) includes a second side portion (123). The third sidewall portion (113) and the fourth sidewall portion (114) are connected to the second side portion (123). Along the width direction of the fin (100), the third sidewall portion (113) is offset to one side relative to the second side portion (123), and the fourth sidewall portion (114) is offset to one side relative to the second side portion (123). The second side (123) is offset to the other side. Along the length direction of the fin (100), at least part of the third sidewall (113) and the fourth sidewall (114) are alternately arranged. Along the width direction of the fin (100), there is a second window (132) between adjacent third sidewall (113) and fourth sidewall (114). The opening direction of the second window (132) has an angle of less than 90° with the length direction of the fin (100).

3. The fin (100) according to claim 2, characterized in that, Along the height direction of the fin (100), the first sidewall portion (111), the second sidewall portion (112), the third sidewall portion (113) and the fourth sidewall portion (114) are collectively referred to as sidewall portion (11), the height of the sidewall portion (11) is h, and the ratio of h to H is between 0.4 and 0.

9.

4. The fin (100) according to claim 2 or 3, characterized in that, The heat exchange unit (1) includes a first channel (141), and the wall forming the first channel (141) includes a second connecting part (12), a first side wall part (111) and a fourth side wall part (114). A first surface is defined, which is perpendicular to the length direction of the fin (100). The flow area of ​​the first channel (141) facing the first surface is A1, and the flow area of ​​the first window (131) and / or the second window (132) facing the first surface is A2. The ratio of A1 to A2 is between 0.73 and 1.

35.

5. The fin according to claim 4, characterized in that, The first sidewall portion (111) includes a first body (1111), the second sidewall portion (112) includes a second body (1121), the third sidewall portion (113) includes a third body (1131), and the fourth sidewall portion (114) includes a fourth body (1141). For the orthographic projection of the first body (1111) onto the first surface and the orthographic projection of the fourth body (1141) onto the first surface, the width distance between the end of the first body (1111) near the second connecting part (12) and the end of the fourth body (1141) near the second connecting part (12) is a, and the width distance between the end of the first body (1111) near the first connecting part (2) and the end of the fourth body (1141) near the first connecting part (2) is b, and the ratio of a to b is between 0.64 and 1.14, including 0.64 and 1. .14; and / or, for the orthographic projection of the second body (1121) onto the first surface and the orthographic projection of the third body (1131) onto the first surface, the width distance between the end of the second body (1121) near the first connecting part (2) and the end of the third body (1131) near the first connecting part (2) is a, and the width distance between the end of the second body (1121) near the second connecting part (12) and the end of the third body (1131) near the second connecting part (12) is b, and the ratio of a to b is between 0.64 and 1.

14.

6. The fin according to any one of claims 2-5, characterized in that, Along the length direction of the fin (100), the widths of the plurality of first sidewall portions (111) are the same or at least two of the plurality of first sidewall portions (111) have different widths; the widths of the plurality of second sidewall portions (112) are the same or at least two of the plurality of second sidewall portions (112) have different widths; the widths of the plurality of third sidewall portions (113) are the same or at least two of the plurality of third sidewall portions (113) have different widths; the widths of the plurality of fourth sidewall portions (114) are the same or at least two of the plurality of fourth sidewall portions (114) have different widths; along the width direction of the fin, the widths of the correspondingly provided first sidewall portions (111) and third sidewall portions (113) are the same, and the widths of the correspondingly provided second sidewall portions (112) and fourth sidewall portions (114) are the same.

7. The fin according to claim 6, characterized in that, The width of the first sidewall portions (111) on both sides away from the main flow direction is the same, and the width of the first sidewall portions (111) on both sides away from the main flow direction is the same as that of the third sidewall portion (113). The width of the first sidewall portions (111) on both sides away from the main flow direction is w, and w / λ is between 0.36 and 3.

7.

8. The fin according to claim 7, characterized in that, Along the length direction of the fin (100), w is 0.45 to 3.54 mm.

9. The fin according to claim 1 or 8, characterized in that, The fin (100) is formed by rolling or stamping a plate. The thickness of the plate is δ. Along the height direction of the fin (100), the height of the second connecting part (12) or the first connecting part (2) is c, where c / δ = 2.3 to 4.

7.

10. A heat exchanger, characterized in that, The device includes multiple plates (3) and multiple fins (100). The plates (3) are stacked, and fins (100) are provided between adjacent plates (3). Each fin (100) includes multiple heat exchange units (1), multiple first connecting parts (2), and multiple second connecting parts (12). The heat exchange units (1) are arranged along the width direction of the fins (100). The first connecting parts (2) connect two adjacent heat exchange units (1), and the second connecting parts (12) connect two adjacent heat exchange units (1). Along the height direction of the heat exchange units (1), one side of the first connecting part (2) is connected to the plate (3). The other side of the first connecting part (2) is connected to the heat exchange unit (1), one side of the heat exchange unit (1) is connected to the first connecting part (2), the other side of the heat exchange unit (1) is connected to the second connecting part (12), the second connecting part (12) is connected to the plate (3), the height of the fin (100) is H, and the distance between the center line of the adjacent first connecting part (2) or the center line of the adjacent second connecting part (12) is defined as λ along the width direction of the fin (100). The ratio of λ to H is 0.20 to 2.54, or the ratio of λ to H is 0.08 to 0.

93.

11. The heat exchanger according to claim 10, characterized in that, The heat exchange unit (1) includes a plurality of first sidewall portions (111) and a plurality of second sidewall portions (112). Along the length direction of the fins (100), the width of the first sidewall portions (111) near the two sides of the main flow direction is smaller than the width of the remaining first sidewall portions (111).

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