Radiator with increased air flow

Abstract

The present invention relates to a heat sink (100) for transferring heat from one or more electrical devices to a heat transfer medium. The heat sink (100) includes a plurality of fins provided on the front side (102) of the heat sink (100). The plurality of fins includes a first fin group (122a, 122b, ..., 122n) extending in a first plane direction (D1) and a second fin group (124a, 124b, ..., 124n) extending in a second plane direction (D2), wherein the second plane direction D2 is at an angle to the first plane direction D1. For example, the first fin group (122a, 122b, ..., 122n) may extend from the bottom to the top of the heat sink (100), while the second fin group (124a, 124b, ..., 124n) may extend from the first fin group (122a, 122b, ……, 122n) towards the side of the heat sink (100). Thus, for example, the side of the heat sink (100) can serve as an air outlet and can increase the air flow through the heat sink (100).

Description

Technical Field

[0001] The present invention relates to a heat sink attachable to or attached to one or more electrical devices for transferring heat from the one or more electrical devices to a heat transfer medium. The present invention further relates to a cooling device including the heat sink. Background Art

[0002] Heat sinks for natural convection cooling (NCC) utilize an air flow through the heat sink to provide cooling for electrical devices or components. The air flow is guided through the heat sink via a plurality of fins. Heat sinks designed for NCC include optimized air inlets, air outlets, and fins. Summary of the Invention

[0003] An object of embodiments of the present invention is to provide a solution for alleviating or solving the disadvantages and problems of traditional solutions.

[0004] The above and further objects are solved by the subject matter of the independent claims. The dependent claims of the present invention further provide other advantageous embodiments.

[0005] According to a first aspect of the present invention, the above and other objects are achieved by a heat sink attachable to or attached to one or more electrical devices for transferring heat from the one or more electrical devices to a heat transfer medium, the heat sink including a plurality of fins provided on a front side of the heat sink, wherein the plurality of fins includes a first fin group and a second fin group, wherein the fins in the first fin group extend along a first planar direction of the front side; and

[0006] the fins in the second fin group extend along a second planar direction of the front side, wherein the second planar direction is at an angle to the first planar direction.

[0007] The heat transfer medium may be any fluid suitable for heat transfer. The heat transfer medium may be, for example, air, but is not limited thereto.

[0008] An advantage of the heat sink according to the first aspect is that the plurality of fins can be arranged in a flexible manner, capable of optimizing the air inlets and air outlets of the heat sink to increase and control the air flow through the heat sink. Thus, the heat sink can provide improved heat transfer.

[0009] The front side is generally planar and thus defines a plane. The planar direction is a direction parallel to the plane, i.e., a direction orthogonal to the normal direction of the plane. In other words, the first fin group extends along a first direction (first planar direction) parallel to the plane defined by the front side. The second fin group extends along a second direction (second planar direction) parallel to the plane defined by the front side.

[0010] In an embodiment of the radiator according to the first aspect,

[0011] the first fin group is arranged along the line on the front side and extends from the top end to the bottom end of the radiator; and

[0012] the second fin group extends towards the side of the radiator.

[0013] The advantage of this embodiment is that the side of the radiator is open to the air flow. Therefore, the side can be used as an air inlet or an air outlet. In addition, the area between the first fin group and the second fin group can increase the air intake at the front of the radiator. Therefore, the air flow through the radiator is increased and the distribution of the air flow in the radiator is improved, thereby improving the heat transfer provided by the radiator.

[0014] In an embodiment of the radiator according to the first aspect, the second fin group includes a first fin subgroup and a second fin subgroup, wherein,

[0015] the fins in the first fin subgroup extend from the first fin group towards the first side of the radiator, and

[0016] the fins in the second fin subgroup extend from the first fin group towards the second side of the radiator that is oppositely arranged to the first side.

[0017] The advantage of this embodiment is that both sides of the radiator can be used as air inlets or air outlets, providing greater flexibility in fin design while keeping the fin design simple.

[0018] In an embodiment of the radiator according to the first aspect, the first fin subgroup and the second fin subgroup include the same number of fins.

[0019] The advantage of this embodiment is that the fin design is simple and easy to manufacture.

[0020] In an embodiment of the radiator according to the first aspect, one or more fins in the first fin subgroup extend from one or more corresponding fins in the second fin subgroup, and one or more fins in the first fin subgroup are aligned with one or more corresponding fins in the second fin subgroup.

[0021] The advantage of this embodiment is that the air intake from the bottom of the radiator can be at least partially blocked, thereby increasing the intake of cold air at the front of the radiator and supplying it to a specific area of the radiator. Therefore, an improved air flow distribution is provided in the radiator.

[0022] In an embodiment of the radiator according to the first aspect, the first fin group includes a third fin subgroup that extends partially from the top end (106) towards the bottom end, and vice versa.

[0023] The advantage of this implementation form is that it provides greater flexibility in the design of the fins, allowing for further optimization of the intake and outlet ports to increase and control the air flow through the radiator.

[0024] In an implementation form of the radiator according to the first aspect, the length of the fins in the third sub-group of fins depends on the distance to the side of the radiator.

[0025] The advantage of this implementation form is that it provides greater flexibility in the design of the fins, allowing for further optimization of the intake and outlet ports to increase and control the air flow through the radiator.

[0026] In an implementation form of the radiator according to the first aspect, the length increases or decreases according to the distance to the side of the radiator.

[0027] The advantage of this implementation form is that it provides greater flexibility in the design of the fins, allowing for further optimization of the intake and outlet ports to increase and control the air flow through the radiator.

[0028] In an implementation form of the radiator according to the first aspect, one or more fins in the first fin group are aligned with one or more corresponding fins in the second fin group.

[0029] The advantage of this implementation form is that the air flow between the fins in the first fin group and the fins in the second fin group is mostly uninterrupted, i.e., not blocked. Therefore, an increased air flow can be provided through the radiator.

[0030] In an implementation form of the radiator according to the first aspect, the one or more fins in the first fin group and the one or more corresponding fins in the second fin group form common fins.

[0031] The advantage of this implementation form is that heat can be conducted between the first fin group and the second fin group through the common fins. Thus, heat can be transferred between the first fin group and the second fin group.

[0032] In an implementation form of the radiator according to the first aspect, there is a gap between the one or more fins in the first fin group and the one or more corresponding fins in the second fin group.

[0033] The advantage of this implementation form is that heat cannot be conducted between the first fin group and the second fin group, thus avoiding heat transfer between the first fin group and the second fin group.

[0034] In an implementation form of the radiator according to the first aspect, one or more fins in the first fin group are not aligned with one or more corresponding fins in the second group.

[0035] The advantage of this implementation form is that the boundary layer is disrupted, and thus, the second fin group obtains a higher heat flux from the fins to the air.

[0036] In an implementation form of the radiator according to the first aspect, the first fin group includes a fourth sub-group of fins that extends completely from the top end to the bottom end, and vice versa.

[0037] The advantage of this implementation form is that the area between the first fin group and the second fin group can increase the intake air volume at the front of the radiator.

[0038] In an implementation form of the radiator according to the first aspect, the second planar direction is at an angle to the first planar direction, and the angle has a value between 0 and 90 degrees.

[0039] In an implementation form of the radiator according to the first aspect, the angle has a value between 30 and 45 degrees.

[0040] The advantages of these implementation forms are that the air inlet or outlet of the second fin group can be optimized relative to the first fin group, thereby increasing the air flow through the radiator.

[0041] According to a second aspect of the present invention, the above and other objects are achieved by a cooling device, which includes

[0042] a radiator according to any implementation form of the radiator according to the first aspect, and

[0043] one or more electrical devices attached to the rear side of the radiator.

[0044] The advantages of the cooling device according to the second aspect are the same as those of the corresponding implementation forms of the radiator according to the first aspect. In addition, since the radiator according to the first aspect provides improved heat transfer, the cooling device according to the second aspect can provide improved cooling for one or more electrical devices.

[0045] In an implementation form of the cooling device according to the second aspect, the second planar direction is at an angle in the area at the front side opposite to the area at the rear side, where the one or more electrical devices are attached to the area at the rear side.

[0046] The advantage of this implementation form is that the intake air at the front of the radiator is increased in the area where the one or more electrical devices are located. Therefore, improved heat transfer can be provided in this area, and thus overheating of electrical devices sensitive to high temperatures can be prevented.

[0047] Through the following detailed description, further applications and advantages of the embodiments of the present invention will become apparent. Description of the Drawings

[0048] The accompanying drawings are intended to illustrate and explain different embodiments of the present invention, wherein:

[0049] Figure 1a -c shows a prior art heat sink;

[0050] Figure 2a -b shows a heat sink according to an embodiment of the present invention;

[0051] Figure 3a -b shows a heat sink according to an embodiment of the present invention;

[0052] Figure 4a -c shows a first fin group and a second fin group according to an embodiment of the present invention

[0053] Figure 5a -b shows a heat sink according to an embodiment of the present invention;

[0054] Figure 6a -b shows a heat sink according to an embodiment of the present invention;

[0055] Figure 7 shows the airflow through the heat sink according to an embodiment of the present invention;

[0056] Figure 8 shows a cooling device according to an embodiment of the present invention; and

[0057] Figure 9a -d shows the shape of the heat sink according to an embodiment of the present invention. Detailed Description

[0058] In some conventional heat sinks for NCC, the fin design aims to optimize the intake air at the bottom of the heat sink and utilize the top of the heat sink as the outlet. Therefore, the fins of conventional heat sinks for NCC are usually straight and extend from the bottom to the top of the heat sink. Figure 1a -c shows a conventional heat sink, wherein the fins extend along the length l direction of the heat sink. As Figure 1a shown in -b, the fins are provided on the front of the heat sink. As Figure 1c shown, the electronic device to be cooled by the heat sink is provided on the back of the heat sink. The electronic device can, for example, be connected to a printed circuit board (PCB), which in turn is connected or in contact with the heat sink.

[0059] For a rectangular and tall radiator, i.e., the length l is much greater than the width w, the air flow entering the radiator from the front will be higher than the air flow entering the radiator from the bottom. The inventor found during the study of traditional radiators that: traditional radiators do not utilize the air obtained from the front of the radiator, so the rectangular and tall radiators are not optimized. To maximize the potential of the available air in front of the radiator, a balance needs to be achieved between the air inlet and the air outlet. If both the bottom and the front of the radiator are used as air inlets, it is not sufficient for the top of the radiator to be used as the air outlet. Therefore, more air outlets need to be provided in the radiator.

[0060] Therefore, an object of the present invention is to improve the design of the fins of the radiator to optimize the air inlet and the air outlet, thereby optimizing the air flow through the radiator. Herein, a design is provided. For example, the side of the radiator can be opened and used as the air outlet.

[0061] Figure 2a -b shows a radiator 100 for transferring heat from one or more electrical devices to a heat transfer medium. The heat transfer medium can be but is not limited to air. The radiator 100 can be attached to or attached to one or more electrical devices ( Figure 2a -b not shown). The radiator 100 includes a plurality of fins provided on the front side 102 of the radiator 100. The front side 102 of the radiator 100 can be planar, and thus defines a plane on which a plurality of fins are provided. Generally, the plurality of fins can be attached to or formed integrally with the front side 102 of the radiator 100. In addition, in a non-limiting embodiment, each of the plurality of fins can be provided in a plane substantially perpendicular to the front side 102, i.e., having an extension in a direction substantially perpendicular to the plane of the front side 102. The extension of each fin in the direction substantially perpendicular to the plane of the front side 102 can be regarded as the height of the fin.

[0062] The plurality of fins includes a first fin group 122a, 122b,..., 122n and a second fin group 124a, 124b,..., 124n. The fins in the first fin group 122a, 122b, ……, 122n extend along a first plane direction D1 of the front side 102. The first plane direction D1 is a direction in the plane of the front side 102. Therefore, the fins in the first fin group 122a, 122b,..., 122n have an extension along the plane defined by the front side 102 in the first plane direction D1. The fins in the second fin group 124a, 124b,..., 124n extend along a second plane direction D2 of the front side 102. The second plane direction D2 is also a direction in the plane of the front side 102. Therefore, the fins in the second fin group 124a, 124b, ……, 124n have an extension along the plane defined by the front side 102 in the second plane direction D2. As Figure 2aAs shown in Figure -b, the second planar direction D2 is at an angle to the first planar direction D1.

[0063] According to an embodiment of the present invention, the second planar direction D2 is at an angle λ to the first planar direction D1, where λ has a value between 0 and 90 degrees. In an embodiment, the angle λ can further have a value between 30 and 45 degrees. In the embodiment shown in Figure 2a Figure -b, the included angle λ between the first planar direction D1 and the second planar direction D2 is approximately 45 degrees.

[0064] The distance between the fins, sometimes referred to as the pitch, can be different or the same within a set of fins and between fin groups. For example, the distance between the fins in the first fin group 122a, 122b,..., 122n can be different or the same as the distance between the fins in the second fin group 124a, 124b,..., 124n.

[0065] Referring to Figure 2b , the first fin group 122a, 122b, ……, 122n can be arranged along the line L on the front side 102 extending from the top end 106 of the radiator 100 to the bottom end 108 of the radiator 100. In addition, the second fin group 124a, 124b, ……, 124n can extend towards the side surfaces 110a, 110b of the radiator 100.

[0066] In addition, the second fin group 124a, 124b,..., 124n can include a first sub - fin group S1 and a second sub - fin group S2. The fins in the first sub - fin group S1 extend from the first fin group 122a, 122b, ……, 122n towards the first side surface 110a of the radiator 100, while the fins in the second sub - fin group S2 extend from the first fin group 122a, 122b, ……, 122n towards the second side surface 110b of the radiator 100 that is oppositely arranged to the first side surface 110a.

[0067] Therefore, in some embodiments, as shown in Figure 2b , the first fin group 122a, 122b, ……, 122n can be arranged between the first sub - fin group S1 and the second sub - fin group S2, where the first sub - fin group S1 and the second sub - fin group S2 are included in the second fin group 124a, 124b, ……, 124n. The first sub - fin group S1 and the second sub - fin group S2 can include the same number of fins. However, in some embodiments, without departing from the scope of the present invention, the first sub - fin group S1 and the second sub - fin group S2 can include different numbers of fins.

[0068] In Figure 2aIn the embodiment shown in -b, all the fins in the first fin groups 122a, 122b, ..., 122n extend completely from the top end 106 to the bottom end 108 of the radiator 100. However, the first fin groups 122a, 122b, ..., 122n may include a sub-group of fins that only partially extend from the top end 106 to the bottom end 108 of the radiator 100, and vice versa. For example, the first fin groups 122a, 122b, ..., 122n may include a third sub-group of fins that partially extend from the top end 106 to the bottom end 108, and vice versa. The length of the fins in the third sub-group of fins may depend on the distance to the side surfaces 110a, 110b of the radiator 100. For example, the length may increase or decrease according to the distance to the side surfaces 110a, 110b of the radiator 100.

[0069] Figure 3a -b shows a radiator 100 according to an embodiment, wherein the first fin groups 122a, 122b, ……, 122n include a third sub-group of fins S3. In Figure 3a In the embodiment shown in -b, the fins in the third sub-group of fins S3 partially extend from the radiator 100 to the bottom end 108, while the remaining fins in the first fin groups 122a, 122b, ..., 122n extend completely from the bottom end 108 to the top end 106 of the radiator 100. The length of the fins in the third sub-group of fins S3 depends on the distance to the side surfaces 110a, 110b of the radiator 100, such that when the distance to the side surfaces 110a, 110b of the radiator 100 decreases, the length of the fins in the third sub-group of fins S3 decreases.

[0070] In Figure 3a In the embodiment shown in -b, the first fin groups 122a, 122b, ……, 122n further include a fourth sub-group of fins S4 that extend completely from the top end 106 to the bottom end 108, and vice versa. The third sub-group of fins S3 is disposed on both sides of the fourth sub-group of fins S4, that is, towards the first side surface 110a and the second side surface 110b of the radiator 100 simultaneously. Therefore, when the distance to the first side surface 110a of the radiator 100 decreases, the length of some of the fins in the third sub-group of fins S3 decreases, and when the distance to the second side surface 110b of the radiator 100 decreases, the length of some of the fins in the third sub-group of fins S3 decreases.

[0071] In some regions on the front side 102 of the radiator 100, due to the different extending directions of the first fin groups 122a, 122b, ……, 122n and the second fin groups 124a, 124b, ……, 124n, one or more fins from the first fin groups 122a, 122b, ..., 122n may meet one or more fins in the second fin groups 124a, 124b, ..., 124n. Now reference will be made toFigure 4a -c further describes details related to these regions. These regions can, for example, correspond to Figure 3a region A shown in

[0072] Figure 4a -c shows the transition from one or more fins in the first fin group 122a, 122b,..., 122n to one or more corresponding fins in the second fin group 124a, 124b,..., 124n according to different embodiments. In Figure 4a , one or more fins in the first fin group 122a, 122b,..., 122n are aligned with one or more corresponding fins in the second fin group 124a, 124b,..., 124n. Further, one or more fins in the first fin group 122a, 122b,..., 122n and one or more corresponding fins in the second fin group 124a, 124b,..., 124n form a common fin, for example, by folding or squeezing. One or more fins in the first fin group 122a, 122b,..., 122n and one or more corresponding fins in the second fin group 124a, 124b,..., 124n can, for example, be connected to each other or formed integrally. Thus, there is no gap between one or more fins in the first fin group 122a, 122b,..., 122n and one or more corresponding fins in the second fin group 124a, 124b,..., 124n. The common fin can conduct heat, so heat can be transferred between the first fin group 122a, 122b,..., 122n and the second fin group 124a, 124b,..., 124n.

[0073] Figure 4b shows an embodiment in which one or more fins in the first fin group 122a, 122b,..., 122n are still aligned with one or more corresponding fins in the second fin group 124a, 124b,..., 124n. However, there is a gap between one or more fins in the first fin group 122a, 122b,..., 122n and one or more corresponding fins in the second fin group 124a, 124b,..., 124n. In this embodiment, heat transfer between the first fin group 122a, 122b,..., 122n and the second fin group 124a, 124b,..., 124n can be avoided.

[0074] In Figure 4cIn the illustrated embodiment, one or more fins in the first fin groups 122a, 122b, ..., 122n are misaligned with one or more corresponding fins in the second fin groups 124a, 124b, ..., 124n. Accordingly, a gap exists between one or more fins in the first fin groups 122a, 122b, ..., 122n and one or more corresponding fins in the second fin groups 124a, 124b, ..., 124n. For the misaligned fins, the boundary layer is disrupted, and thus a higher heat flux from the fins to the air can be achieved.

[0075] Figure 5a -b shows a heat sink 100 according to an embodiment, in which the first fin groups 122a, 122b, ..., 122n include a third fin sub-group S3, and the second fin groups 124a, 124b, ..., 124n include a first fin sub-group S1 and a second fin sub-group S2. In Figure 5a -b, in the illustrated embodiment, the fins in the third fin sub-group S3 partially extend from the top end 106 of the heat sink 100. The first fin groups 122a, 122b, ..., 122n do not include any fourth fin sub-group S4 that extends completely from the top end 106 to the bottom end 108 of the heat sink 100. This means that some fins in the first fin sub-group S1 partially extend from the first fin groups 122a, 122b, …, 122n towards the first side 110a of the heat sink 100, and some fins in the first fin sub-group S1 partially extend from the second fin sub-group S2 towards the first side 110a of the heat sink 100. Similarly, some fins in the second fin sub-group S2 partially extend from the first fin groups 122a, 122b, …, 122n towards the second side 110b of the heat sink 100, and some fins in the second fin sub-group S2 partially extend from the first fin sub-group S1 towards the second side 110b of the heat sink 100. Accordingly, in some embodiments, one or more fins in the first fin sub-group S1 may extend from one or more corresponding fins in the second fin sub-group S2 and may be aligned with one or more corresponding fins in the second fin sub-group S2.

[0076] In the above embodiments of the present invention, both the first fin sub-group S1 and the second fin sub-group S2 in the second fin groups 124a, 124b, …, 124n extend in the second plane direction D2 and are at the same angle λ with respect to the first plane direction D1. However, in some embodiments, the first fin sub-group S1 and the second fin sub-group S2 in the second fin groups 124a, 124b, …, 124n may be arranged at different angles with respect to the first plane direction D1. Figure 6a -b shows a heat sink 100 according to such an embodiment. Refer to Figure 6a-b. In the second fin sub-group S2, the fins extend along a second planar direction D2, while the first fin sub-group S1 extends along another second planar direction D2'. The second planar direction D2 forms an angle λ with the first planar direction D1, and the other second planar direction D2′ forms an angle λ` with the first planar direction D1, where the angle λ` is different from the angle λ. Either the angle λ` or the angle λ can have a value between 0 and 90 degrees. In some embodiments, either the angle λ` or the angle λ can further have a value between 30 and 45 degrees.

[0077] Figure 7 Shows the air flow through the heat sink 100 according to an embodiment of the present invention. Figure 7 The multiple fins of the shown heat sink 100 are arranged as described above with reference to Figure 3a -b. Thus, the first fin groups 122a, 122b,..., 122n are arranged such that air can enter the heat sink 100 from the front side 102 and the bottom end 108 of the heat sink 100, as indicated by the white arrows in Figure 7 In addition, the second fin groups 124a, 124b,..., 124n are arranged such that air can leave the heat sink 100 from the top end 106 and the sides 110a, 110b of the heat sink 100, as indicated by the black arrows in Figure 7 Compared with traditional solutions, by opening the sides 110a, 110b of the heat sink 100 with the angled fins in the second fin groups 124a, 124b,..., 124n, the air flow through the heat sink 100 can be increased, and the heat sink 100 can provide improved heat transfer.

[0078] The heat sink 100 can be manufactured in a variety of different ways. In embodiments where the multiple fins are integrated with the heat sink 100, the heat sink 100 can be manufactured using any of the following: forging, casting, molding, machining, and 3D printing. In embodiments where the multiple fins are attached to the base of the heat sink 100, the base can be manufactured as described above, and the multiple fins can be manufactured using any of the following: extrusion, casting, forging, stamping, cutting, and molding. The multiple fins can also be attached to the base using any of the following: press fitting, brazing, gluing, welding, and soldering. The multiple fins can be made of, for example, aluminum, copper, graphite, zinc, or other thermally conductive materials.

[0079] According to an embodiment of the present invention, a cooling device 200 is also provided. The cooling device 200 includes a heat sink 100 according to any embodiment of the present invention and one or more electrical devices attached to the rear side 104 of the heat sink 100. Figure 8There is shown such a cooling device 200, wherein an electrical device 300 is attached to the rear side 104 of the heat sink 100. The electrical device 300 can be attached to the rear side 104 of the heat sink 100 directly or in a conventional manner through a heat-conducting material. The electrical device 300 can also be attached to a printed circuit board, wherein the printed circuit board is attached to or connected to the rear side 104 of the heat sink 100. A plurality of fins of the heat sink 100 are arranged as described above Figure 3a -b. Thus, the first fin groups 122a, 122b, ……, 122n are arranged to extend along the first planar direction D1, and the second fin groups 124a, 124b, ……, 124n are arranged to extend along the second planar direction D2, wherein the second planar direction D2 forms an angle with the first planar direction D1. However, as Figure 8 shown, the second planar direction D2 forms an angle with the first planar direction D1 in the region of the front side 102 opposite to the region of the rear side 104, where the electrical device 300 is attached to the rear side 104. Thus, a greater air flow can be provided in the region where the electrical device 300 is located, i.e., the region with high heat flux, and thus improved heat transfer is provided. Thereby, the cooling device 100 can provide effective cooling for the electrical device 300.

[0080] The heat sink 100 in the above embodiments has a rectangular shape, that is, the planar shape of the front side 102 of the heat sink 100 is substantially rectangular. However, in some embodiments, the heat sink 100 can have other shapes than rectangular. Figure 9a -d shows four examples of alternative shapes of the heat sink 100. Figure 9a The examples shown in -d are non-limiting, and the heat sink 100 according to the present invention can have other shapes without departing from the scope of the present invention.

[0081] Finally, it should be understood that the present invention is not limited to the above embodiments, but relates to and encompasses all embodiments within the scope of the appended independent claims.

Claims

1. A heat sink (100) attachable to or attached to one or more electrical devices for transferring heat from the one or more electrical devices to a heat transfer medium, the heat sink (100) comprising a plurality of fins provided on a front side (102) of the heat sink (100); wherein, The plurality of fins includes a first fin group (122a, 122b, ..., 122n) and a second fin group (124a, 124b, ..., 124n), wherein, the fins in the first fin group (122a, 122b, ……, 122n) extend along a first planar direction (D1) of the front side (102); and the fins in the second fin group (124a, 124b, ……, 124n) extend along a second planar direction (D2) of the front side (102), wherein the second planar direction (D2) is angled with respect to the first planar direction (D1); wherein the first fin group (122a, 122b, ……, 122n) is disposed along a line (L) of the front side (102), including fins extending completely from the top end (106) of the shown radiator (100) towards the bottom end (108) of the radiator (100); and the second fin group (124a, 124b, ……, 124n) extends towards the side surfaces (110a, 110b) of the radiator (100); wherein the first fin group (122a, 122b, …, 122n) further includes a third sub - fin group S3 extending partially from the top end (106) towards the bottom end (108), or includes a third sub - fin group extending partially from the bottom end (108) towards the top end (106); wherein the first fin group (122a, 122b, ……, 122n) further includes a fourth sub - fin group S4 extending completely from the top end (106) towards the bottom end (108), or includes a fourth sub - fin group extending completely from the bottom end (108) towards the top end (106), wherein the third sub - fin group S3 is disposed on both sides of the fourth sub - fin group S4; wherein the second fin group (124a, 124b, ……, 124n) includes a first sub - fin group S1 and a second sub - fin group S2, wherein, the fins in the first sub - fin group extend from the first fin group (122a, 122b, ……, 122n) towards the first side surface (110a) of the radiator (100) and the top end (106), and the fins in the second sub - fin group extend from the first fin group (122a, 122b, ……, 122n) towards the second side surface (110b) of the radiator (100) opposite to the first side surface (110a) and the top end (106); wherein the second planar direction (D2) includes the first side surface (110a) and the oppositely - disposed second side surface (110b); wherein the first side surface (110a) of the second planar direction (D2) is angled λ` with respect to the first planar direction (D1), and the second side surface (110b) of the second planar direction (D2) is angled λ with respect to the first planar direction (D1), wherein λ, λ` are acute angles between 0 and 90 degrees.

2. The radiator (100) according to claim 1, wherein, The first sub - fin group and the second sub - fin group include the same number of fins.

3. The radiator (100) according to claim 1 or 2, wherein, One or more fins in the first fin sub - group extend from one or more corresponding fins in the second fin sub - group, and the one or more fins in the first fin sub - group are aligned with the one or more corresponding fins in the second fin sub - group.

4. The radiator (100) according to claim 1 or 2, wherein, The length of the fins in the third fin sub - group depends on the distance to the sides (110a, 110b) of the radiator (100).

5. The radiator (100) according to claim 4, wherein, The length increases or decreases according to the distance to the sides (110a, 110b) of the radiator (100).

6. The radiator (100) according to claim 1 or 2, wherein, One or more fins in the first fin group (122a, 122b, ……, 122n) are aligned with one or more corresponding fins in the second fin group (124a, 124b, ……, 124n).

7. The radiator (100) according to claim 6, wherein, The one or more fins in the first fin group (122a, 122b, ……, 122n) and the one or more corresponding fins in the second fin group (124a, 124b, ……, 124n) form a common fin.

8. The radiator (100) according to claim 6, wherein, There is a gap between the one or more fins in the first fin group (122a, 122b,..., 122n) and the one or more corresponding fins in the second fin group (124a, 124b, ……, 124n).

9. The radiator (100) according to claim 1 or 2, wherein, One or more fins in the first fin group (122a, 122b, ……, 122n) are not aligned with one or more corresponding fins in the second fin group (124a, 124b, ……, 124n).

10. A cooling device (200) comprising The radiator (100) according to any one of the preceding claims, and One or more electrical devices attached to the rear side (104) of the radiator (100).

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