Radiator

Abstract

Provided is a heat sink in which heat exchange performance of fins is excellent and pressure loss received by cooling air when the cooling air flows through the fins can be reduced. The heat sink includes: a heat receiving portion thermally connected to the heat generating body; a flat first heat sink thermally connected to the heat receiving portion and having a first main surface; and a flat-plate-shaped second heat radiation fin thermally connected to the heat receiving portion and having a second main surface, the area of the second main surface being smaller than the area of the first main surface, the second heat radiation fin being disposed between the plurality of first heat radiation fins and at a position where the second main surface overlaps the first main surface in plan view.

Description

Technical Field

[0001] This utility model relates to a radiator that cools a heat-generating element by forced air cooling, and in particular, to a radiator that has excellent cooling characteristics and can reduce the pressure loss of the cooling air. Background Technology

[0002] With the increasing functionality of electronic devices in recent years, multiple components, including heat-generating elements such as electronic parts, are densely packed inside these devices. Furthermore, as electronic devices become more functional, the heat generated by these heat-generating elements is increasing. Heat sinks are sometimes used to cool these heat-generating elements.

[0003] As a heat sink, it has a base plate thermally connected to a heat-generating element that is being cooled, and a plurality of heat sink fins thermally connected to the base plate. The heat-generating element is cooled by supplying cooling air to the heat sink fins. In addition, since excellent cooling characteristics are required for the heat sink, heat sinks with a structure that includes heat sink fins and heat pipes are sometimes used.

[0004] As a radiator with a structure incorporating heat sinks and heat pipes, a radiator has been proposed that has a plurality of extruded profiles, each extruded profile having a base plate and plates protruding from the base plate. The plurality of extruded profiles are arranged and joined together in a width direction orthogonal to the extrusion direction. The plurality of extruded profiles have a plurality of the plates, and the base plate has through holes extending along the extrusion direction for mounting heat pipes (Patent Document 1). In Patent Document 1, the heat load of each heat sink is dispersed and uniformized by the heat transport function of the heat pipes, suppressing local temperature rise of the heat sinks, thereby improving the heat dissipation characteristics of the heat sinks and the cooling characteristics of the radiator. In addition, in the radiator of Patent Document 1, the spacing between the plurality of heat sinks is approximately the same.

[0005] On the other hand, to improve the cooling performance of a radiator, it is necessary not only to improve the heat dissipation characteristics of the heat sink fins, but also to ensure that the cooling air supplied to the radiator is smoothly distributed throughout the entire heat sink fin area, so as to fully utilize the heat exchange performance of the heat sink fins. In order to ensure that the cooling air is smoothly supplied throughout the entire heat sink fin area, it is necessary to reduce the pressure loss encountered by the cooling air when it flows through the heat sink fins.

[0006] In the heat sink of Patent Document 1, where the spacing between multiple heat sinks is approximately the same, increasing the spacing between the multiple heat sinks arranged side-by-side reduces the pressure loss experienced by the cooling air as it flows through the heat sinks. However, increasing the spacing between the multiple heat sinks limits the number of heat sinks that can be installed, thus hindering the improvement of the heat dissipation characteristics. On the other hand, increasing the number of heat sinks to improve their heat dissipation characteristics results in pressure loss of the cooling air as it flows through the heat sinks, preventing the heat exchange performance of the heat sinks from being fully utilized.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: International Publication No. 2019 / 053791 Utility Model Content

[0010] Problems to be solved by the utility model

[0011] This invention was made in view of the above-mentioned problems in the prior art, and its purpose is to provide a radiator with excellent heat exchange performance of the heat sink and the ability to reduce the pressure loss of cooling air when it flows through the heat sink.

[0012] Technical solutions to the problem

[0013] The structural essence of this utility model is as follows.

[0014] [1] A radiator, wherein:

[0015] The heated part is thermally connected to the heating element;

[0016] A flat, first heat sink, thermally connected to the heated portion, has a first main surface; and

[0017] A flat, second heat sink is thermally connected to the heated portion and has a second main surface, the area of ​​which is smaller than the area of ​​the first main surface.

[0018] The second heat sink is disposed between a plurality of the first heat sinks and at a position where the second main surface coincides with the first main surface when viewed from above.

[0019] [2] According to the radiator described in [1], wherein,

[0020] The second main surface of the second heat sink is configured such that, when viewed from above, it overlaps with the first main surface of the plurality of first heat sinks.

[0021] [3] According to the radiator described in [1] or [2], wherein,

[0022] The heated part is a flat base plate, and the first heat sink and the second heat sink are arranged side by side at a predetermined interval in a direction perpendicular to the surface of the base plate.

[0023] [4] According to the radiator described in [1] or [2], wherein,

[0024] The first heat sink and the second heat sink are thermally connected to the heated part via a heat conduction component.

[0025] [5] According to the radiator described in [4], wherein,

[0026] The first main surface has a first through hole formed in the thickness direction of the first main surface, and the second main surface has a second through hole formed in the thickness direction of the second main surface. The heat conduction member is inserted into the first through hole and the second through hole.

[0027] [6] According to the radiator described in [4], wherein,

[0028] The heat conduction component is a heat pipe or a heat spreader.

[0029] [7] According to the radiator described in [1] or [2], wherein,

[0030] The heated section is the evaporation section of the heat pipe, and the heat insulation section of the heat pipe, which is continuous with the evaporation section, is provided with the condensation section. The first heat sink and the second heat sink are thermally connected to the condensation section.

[0031] [8] According to the radiator described in [7], wherein,

[0032] The heat pipes are provided in a plurality of form, and the number of heat pipes thermally connected to the first heat sink and the second heat sink is greater than the number of heat pipes thermally connected only to the first heat sink.

[0033] [9] According to the radiator described in [7], wherein,

[0034] A heat dissipation section has a heat dissipation fin assembly formed by stacking one heat dissipation fin assembly and another heat dissipation fin assembly. The first heat dissipation fin and the second heat dissipation fin are arranged side by side in the first heat dissipation fin assembly. The first heat dissipation fin and the second heat dissipation fin are arranged side by side adjacent to the first heat dissipation fin assembly. The condensation section of the heat pipe is inserted between the first heat dissipation fin assembly and the other heat dissipation fin assembly.

[0035]

[10] According to the radiator described in [1] or [2], wherein,

[0036] The first heat sink and the second heat sink are connected and integrated by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit.

[0037]

[11] According to the radiator described in [1] or [2], wherein,

[0038] The spacing between the plurality of the first heat sinks is an integer multiple of the spacing between the first heat sink and the second heat sink.

[0039]

[12] According to the radiator described in [1] or [2], wherein,

[0040] The second heat sink is positioned at the location where it coincides with the heat-generating body when viewed from above.

[0041]

[13] According to the radiator described in [1] or [2], wherein,

[0042] It also has a flat third heat sink with a third main surface, the area of ​​which is smaller than the area of ​​the second main surface of the second heat sink.

[0043]

[14] According to the radiator described in

[13] , wherein,

[0044] The third heat sink is positioned between the plurality of the first heat sinks and, when viewed from above, the third main surface coincides with the first main surface.

[0045]

[15] According to the radiator described in

[13] , wherein,

[0046] The third main surface of the third heat sink is configured such that, when viewed from above, it coincides with the first main surface of the first heat sink and the second main surface of the second heat sink.

[0047]

[16] According to the radiator described in

[13] , wherein,

[0048] The second heat sink and the third heat sink are located at the same position as the heat-generating body when viewed from above.

[0049]

[17] According to the radiator described in [1] or [2], wherein,

[0050] The air supply fan used to supply cooling air to the first and second heat sinks is not integrated.

[0051] In the above-described method, "top view" refers to observing the state of the heat sink from a direction opposite to the main surface of the flat heat sink. Furthermore, the first flat heat sink has a first main surface that aids in heat dissipation, the second flat heat sink has a second main surface that aids in heat dissipation, and the third flat heat sink has a third main surface that aids in heat dissipation.

[0052] Utility model effect

[0053] In the radiator of this invention, the heat dissipation section formed by a heat dissipation fin assembly including a plurality of heat dissipation fins has a first heat dissipation fin and a second heat dissipation fin. The area of ​​the second main surface of the second heat dissipation fin is smaller than the area of ​​the first main surface of the first heat dissipation fin. Furthermore, the second heat dissipation fins are arranged such that the second main surface of the plurality of first heat dissipation fins overlaps with the first main surface when viewed from above. Based on the above, in the radiator of this invention, the heat dissipation section has portions where the second heat dissipation fins are present and portions where the second heat dissipation fins are not present. The spacing between the heat dissipation fins in the portions where the second heat dissipation fins are present is narrow, while the spacing between the heat dissipation fins in the portions where the second heat dissipation fins are not present is wide. Therefore, according to the radiator of this invention, the heat exchange performance of the heat dissipation fins in the portions where the second heat dissipation fins are present is excellent, and the pressure loss of the cooling air is reduced in the portions where the second heat dissipation fins are not present. Thus, the heat exchange performance of the heat dissipation fins is excellent, and the pressure loss experienced by the cooling air when flowing through the heat dissipation fins is reduced.

[0054] According to the heat sink of this utility model, the second main surface of the second heat sink is configured to overlap with the first main surface of the plurality of first heat sinks when viewed from above, thereby further improving the heat exchange performance of the heat sink in the heat dissipation part.

[0055] According to the radiator of this utility model, the heated part is a flat base plate, and the first heat sink and the second heat sink are arranged side by side at a predetermined interval in a direction perpendicular to the surface of the base plate, so that the heat of the heat source can be released from the radiator to the external environment at the location where the heat source is installed.

[0056] According to the radiator of this utility model, the first heat sink and the second heat sink are thermally connected to the heated part via a heat conduction member, so that heat from the heating element is reliably conducted from the heated part to the first heat sink and the second heat sink.

[0057] According to the heat sink of this utility model, the first main surface has a first through hole formed in the thickness direction of the first main surface, and the second main surface has a second through hole formed in the thickness direction of the second main surface. The heat conduction member is inserted into the first through hole and the second through hole, thereby improving the thermal connection between the heat conduction member and the first heat sink and the second heat sink, and enabling smoother heat conduction from the heat conduction member to the first heat sink and the second heat sink.

[0058] According to the radiator of this utility model, the heat conduction component is a heat pipe or a heat spreader plate. Through the heat transport function of the heat pipe or heat spreader plate, the heat of the heating element is transferred from the heated part to the first heat sink and the second heat sink, thereby further improving the cooling characteristics of the radiator.

[0059] According to the radiator of this utility model, the heated part is the evaporation part of the heat pipe, and the condensation part of the heat pipe is provided across the heat insulation part of the heat pipe which is continuous with the evaporation part. The first heat sink and the second heat sink are thermally connected to the condensation part. Thus, even if the heat-generating element is placed in a small space where it is impossible to place a heat sink, the heat pipe can transfer heat from the small space to the outside of the small space. Since it can dissipate heat to the outside, it can exert excellent cooling characteristics even for the heat-generating element placed in a small space.

[0060] According to the radiator of this utility model, a plurality of heat pipes are provided. The number of heat pipes thermally connected to the first heat sink and the second heat sink is greater than the number of heat pipes thermally connected only to the first heat sink, thereby enabling the heat load of the heat pipes to be uniform and further improving the cooling characteristics of the radiator.

[0061] According to the heat sink of this utility model, at least a portion of the peripheral area of ​​the first main surface has a first protruding piece that protrudes in the thickness direction of the first main surface, and at least a portion of the peripheral area of ​​the second main surface has a second protruding piece that protrudes in the thickness direction of the second main surface. By connecting the first protruding piece and the second protruding piece, the first heat sink and the second heat sink are connected and integrated, making it easier to install the first heat sink and the second heat sink into the heat sink.

[0062] According to the radiator design of this utility model, by arranging the second heat sink at a position that coincides with the heat-generating body when viewed from above, the heat exchange performance of the heat dissipation section of the radiator is further improved.

[0063] According to the radiator of this utility model, a third heat sink with a main surface area smaller than that of the second main surface of the second heat sink is disposed between a plurality of the first heat sinks and at a position where the main surface of the third heat sink coincides with the first main surface when viewed from above. This results in excellent heat exchange performance of the heat sink and further reduces the pressure loss of cooling air when it flows through the heat sink. Attached Figure Description

[0064] Figure 1 This is a perspective view of the radiator of the first embodiment of this utility model.

[0065] Figure 2 This is a front view of the radiator of the first embodiment of this utility model.

[0066] Figure 3 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the first embodiment of the present invention from the front.

[0067] Figure 4 This is a top view of the first heat sink of the radiator mounted in the first embodiment of the present invention.

[0068] Figure 5 This is a front view of the first heat sink of the radiator mounted in the first embodiment of this utility model.

[0069] Figure 6 This is a side view of the first heat sink of the radiator mounted in the first embodiment of the present invention.

[0070] Figure 7 This is a top view of the second heat sink of the radiator mounted in the first embodiment of this utility model.

[0071] Figure 8 This is a front view of the second heat sink of the radiator mounted in the first embodiment of this utility model.

[0072] Figure 9 This is a side view of the second heat sink of the radiator mounted in the first embodiment of the present invention.

[0073] Figure 10 This is an exploded perspective view illustrating the arrangement of the first and second heat sinks in the heat sink according to the first embodiment of the present invention.

[0074] Figure 11 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the second embodiment of the present invention from the front.

[0075] Figure 12This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the third embodiment of the present invention from the front.

[0076] Figure 13 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the fourth embodiment of the present invention from the front.

[0077] Figure 14 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink according to the fifth embodiment of the present invention from the front.

[0078] Figure 15 This is a front view of the radiator according to the sixth embodiment of this utility model.

[0079] Figure 16 This is a perspective view of the radiator according to the seventh embodiment of this utility model.

[0080] Figure 17 This is a perspective view of the radiator according to the eighth embodiment of this utility model.

[0081] Figure 18 This is a front view of the radiator according to the eighth embodiment of this utility model.

[0082] Figure 19 This is an explanatory diagram showing the general arrangement of heat sinks in the radiator according to the eighth embodiment of the present invention from the front.

[0083] Figure 20 This is a perspective view of the radiator according to the ninth embodiment of this utility model.

[0084] Figure 21 This is a front view of the radiator according to the ninth embodiment of this utility model.

[0085] Figure 22 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink according to the ninth embodiment of the present invention from the front. Detailed Implementation

[0086] The heat sink of the first embodiment of this utility model will be described below with reference to the accompanying drawings. Furthermore, Figure 1 This is a perspective view of the radiator of the first embodiment of this utility model. Figure 2 This is a front view of the radiator of the first embodiment of this utility model. Figure 3 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the first embodiment of the present invention from the front. Figure 4 This is a top view of the first heat sink of the radiator mounted in the first embodiment of the present invention. Figure 5This is a front view of the first heat sink of the radiator mounted in the first embodiment of this utility model. Figure 6 This is a side view of the first heat sink of the radiator mounted in the first embodiment of the present invention. Figure 7 This is a top view of the second heat sink of the radiator mounted in the first embodiment of this utility model. Figure 8 This is a front view of the second heat sink of the radiator mounted in the first embodiment of this utility model. Figure 9 This is a side view of the second heat sink mounted on the heat sink of the first embodiment of the present invention. Furthermore, in the explanatory drawings showing a general outline of the arrangement of the heat sinks in the heat sink of the embodiment of the present invention from the front, for ease of explanation, the first protruding piece protruding in the thickness direction of the first main surface and the second protruding piece protruding in the thickness direction of the second main surface, which will be described later, are not shown.

[0087] like Figure 1 , 2 As shown, the radiator 1 of the first embodiment includes: a flat base plate 50, which serves as the heat-receiving part of the radiator 1 and is thermally connected to the heat-generating element 100 on its back side; a flat first heat sink 10, which is disposed on the surface of the flat base plate 50 and thermally connected to the flat base plate 50 as the heat-receiving part, and has a first main surface 11; and a flat second heat sink 20, which is thermally connected to the flat base plate 50 as the heat-receiving part and has a second main surface 21. The first heat sink 10 mainly has a heat dissipation function on its main surface 11. Similarly, the second heat sink 20 mainly has a heat dissipation function on its main surface 21.

[0088] In the radiator 1, the heat-receiving part is a flat base plate 50, and the first heat sink 10 and the second heat sink 20 are arranged side by side at a predetermined interval in a direction perpendicular to the surface of the base plate 50. The heat sink group 19, which is formed by a plurality of first heat sinks 10, 10, 10... and a plurality of second heat sinks 20, 20, 20... and disposed on the surface of the base plate 50, becomes the heat dissipation part of the radiator 1.

[0089] In the heat sink 1, a plurality of first heat sink fins 10, 10, 10… are arranged side by side at predetermined intervals in a direction perpendicular to the surface of the base plate 50. Furthermore, the main surface 11 of each first heat sink 10 is arranged side by side in a manner substantially parallel to the surface of the base plate 50. The intervals between the plurality of first heat sink fins 10, 10, 10… are not particularly limited, but in the heat sink 1, the plurality of first heat sink fins 10, 10, 10… are arranged at approximately equal intervals. Therefore, the spacing between the first heat sink fins 10 is approximately equal.

[0090] The area of ​​the second main surface 21 of the second heat sink 20 is smaller than the area of ​​the first main surface 11 of the first heat sink 10. That is, the area of ​​the first main surface 11 of the first heat sink 10 is larger than the area of ​​the second main surface 21 of the second heat sink 20, and the heat dissipation characteristics of the first heat sink 10 are greater than those of the second heat sink 20.

[0091] like Figures 1 to 3 As shown, in the radiator 1, a plurality of first heat sinks 10, 10, 10… are arranged side by side at predetermined intervals in a direction perpendicular to the surface of the base plate 50, with second heat sinks 20 positioned between them. That is, the second heat sinks 20 are inserted between the first heat sinks 10. The frequency of insertion of the second heat sinks 20 is not particularly limited, but in the radiator 1, the first heat sinks 10 and the second heat sinks 20 are alternately arranged in a direction perpendicular to the surface of the base plate 50.

[0092] A plurality of second heat sinks 20, 20, 20… are arranged side-by-side at predetermined intervals in a direction perpendicular to the surface of the base plate 50. Furthermore, the main surface 21 of each second heat sink 20 is also arranged side-by-side in a manner substantially parallel to the surface of the base plate 50 and the first main surface 11 of the first heat sink 10. The intervals between the plurality of second heat sinks 20, 20, 20… are not particularly limited, but in the heat sink 1, the plurality of second heat sinks 20, 20, 20… are arranged at approximately equal intervals. Therefore, the spacing between the second heat sinks 20 is approximately equal.

[0093] Furthermore, the second heat sink 20 is positioned where the second main surface 21 coincides with the first main surface 11 of the first heat sink 10 when viewed from above. According to the above, in the radiator 1, the heat sink assembly 19, which serves as a heat dissipation unit, has a portion 40 where the second heat sink 20 is present and a portion 41 where the second heat sink 20 is absent. The spacing between the heat sinks at the portion 40 where the second heat sink 20 is present is narrower than the spacing between the heat sinks at the portion 41 where the second heat sink 20 is absent. The spacing between the heat sinks at the portion 41 where the second heat sink 20 is absent is the same as the spacing between the first heat sink 10. In the radiator 1, the central portion of the heat sink assembly 19 is the portion 40 where the second heat sink 20 is present, and the two ends of the heat sink assembly 19 are the portions 41 where the second heat sink 20 is absent.

[0094] The relationship between the spacing between the plurality of first heat sinks 10, 10, 10... and the spacing between the first heat sink 10 and the second heat sink 20 is not particularly limited. For example, it can be cited that the spacing between the plurality of first heat sinks 10, 10, 10... is an integer multiple (e.g., 2 times) of the spacing between the first heat sink 10 and the second heat sink 20. That is, in the heat sink group 19, it can be cited that the spacing between the portions 41 where the second heat sink 20 is not present is an integer multiple (e.g., 2 times) of the spacing between the portions 40 where the second heat sink 20 is present.

[0095] In the heat sink 1, the second main surface 21 of the second heat sink 20 is positioned to coincide with the first main surfaces 11, 11, 11... of the plurality of first heat sinks 10, 10, 10... when viewed from above. Therefore, the external shape of the heat sink assembly 19 is formed by the plurality of first heat sinks 10, 10, 10... arranged side by side in a direction perpendicular to the surface of the base plate 50.

[0096] A plurality of first heat sinks 10, 10, 10... and a plurality of second heat sinks 20, 20, 20... are thermally connected to the base plate 50, which serves as the heated part, via heat conduction members. That is, the heat sink assembly 19 is thermally connected to the base plate 50, which serves as the heated part, via heat conduction members.

[0097] In the heat sink 1, a plurality of heat pipes 30, 30, 30… are used as heat conduction components. The heat pipe 30 is a tubular body, and its shape along its length can be straight, L-shaped, U-shaped, etc., without particular limitation. The heat pipe 30 has a portion that extends from the base plate 50 in a direction perpendicular to the surface of the base plate 50.

[0098] The portion of the heat pipe 30 mounted on the base plate 50 functions as an evaporator, while the portion extending perpendicularly to the surface of the base plate 50 and thermally connected to a plurality of first heat sinks 10, 10, 10… and a plurality of second heat sinks 20, 20, 20… functions as a condenser. The heat pipe 30 is a heat transfer component whose internal space is sealed and depressurized. The internal space of the heat pipe 30 connects the evaporator to the condenser and is filled with a working fluid. Utilizing its heat transfer characteristics, the heat pipe 30 transfers heat from the heating element 100 from the evaporator to the condenser, i.e., from the base plate 50 to the plurality of first heat sinks 10, 10, 10… and the plurality of second heat sinks 20, 20, 20…

[0099] The structure in which a plurality of first heat sinks 10, 10, 10… are thermally connected to heat pipes 30 is not particularly limited. For example… Figure 1 , 4As shown in Figure 6, in the heat sink 1, the first main surface 11 of the first heat sink 10 has a first through hole 12 formed in the thickness direction of the first main surface 11. The first through hole 12 has a shape corresponding to the radial shape of the heat pipe 30. Furthermore, the first through hole 12 is formed at a portion of the first main surface 11 corresponding to a portion of the heat pipe 30 extending in a direction perpendicular to the surface of the base plate 50. Based on the above, a plurality of first through holes 12 are provided. By inserting a portion of the heat pipe 30 extending in a direction perpendicular to the surface of the base plate 50 into the first through hole 12, the plurality of first heat sinks 10, 10, 10… are thermally connected to the heat pipe 30. Furthermore, the cutout 13 formed in the first through hole 12 is a supply portion for supplying adhesive materials such as solder when the first heat sink 10 is fixed to the heat pipe 30.

[0100] There are no particular limitations on the structure in which a plurality of second heat sinks 20, 20, 20… are thermally connected to heat pipes 30. For example… Figure 1 , 7 As shown in Figures 9-9, in the heat sink 1, the second main surface 21 of the second heat sink 20 has a second through hole 22 formed in the thickness direction of the second main surface 21. The second through hole 22 has a shape corresponding to the radial shape of the heat pipe 30. Furthermore, the second through hole 22 is formed at a portion of the second main surface 21 corresponding to a portion of the heat pipe 30 extending in a direction perpendicular to the surface of the base plate 50. According to the above, a plurality of second through holes 22 are provided. By inserting a portion of the heat pipe 30 extending in a direction perpendicular to the surface of the base plate 50 into the second through hole 22, the plurality of second heat sinks 20, 20, 20... are thermally connected to the heat pipe 30. According to the above, a portion of the heat pipe 30 extending in a direction perpendicular to the surface of the base plate 50 is inserted into the first through hole 12 and the second through hole 22. Furthermore, the cutout 23 formed in the second through hole 22 is a supply part for supplying adhesive materials such as solder when the second heat sink 20 is fixed to the heat pipe 30 and adhesive materials such as solder are used.

[0101] In the heat sink assembly 19 of the radiator 1, a plurality of first heat sinks 10, 10, 10... and a plurality of second heat sinks 20, 20, 20... arranged side by side in a direction perpendicular to the surface of the base plate 50 are connected and integrated. According to the above, the heat sink assembly 19 has a structure that is an integral whole.

[0102] like Figure 1 , 5As shown in Figure 6, the first heat sink 10 has a first protruding piece 14 protruding in the thickness direction of the first main surface 11 in at least a portion of the peripheral region of the first main surface 11. In the first heat sink 10, the first protruding piece 14 is located in the peripheral region of the first main surface 11 that is substantially parallel to the flow direction of the cooling air. The protrusion dimension of the first protruding piece 14 corresponds to the spacing between other heat sinks adjacent to it in the protrusion direction. In the heat sink 1, in the region corresponding to the location 40 where the second heat sink 20 is present, the protrusion dimension of the first protruding piece 14 corresponds to the spacing between the first heat sink 10 and the second heat sink 20. On the other hand, in the region corresponding to the location 41 where the second heat sink 20 is absent, the protrusion dimension of the first protruding piece 14 corresponds to the spacing between the first heat sink 10 and the second heat sink 20.

[0103] In addition, such as Figure 1 , 8 As shown in Figure 9, the second heat sink 20 has a second protrusion 24 protruding in the thickness direction of the second main surface 21 in at least a portion of the peripheral region of the second main surface 21. In the second heat sink 20, the second protrusion 24 is located in the peripheral region of the second main surface 21 that is substantially parallel to the flow direction of the cooling air. The protrusion dimension of the second protrusion 24 corresponds to the fin spacing between other heat sinks adjacent to it in the protrusion direction. In the heat sink 1, the protrusion dimension of the second protrusion 24 corresponds to the fin spacing between the first heat sink 10 and the second heat sink 20.

[0104] The first protruding piece 14 of the first heat sink 10 is connected to other heat sinks adjacent to it in the protrusion direction (in the radiator 1, this is the first heat sink 10 and / or the second heat sink 20), and the second protruding piece 24 of the second heat sink 20 is connected to other heat sinks adjacent to it in the protrusion direction (in the radiator 1, this is the first heat sink 10), thereby obtaining a predetermined fin spacing, and the heat sink assembly 19 is integrally formed. As a method of connecting the first protruding piece 14 and the second protruding piece 24, for example, riveting the first protruding piece 14 and the second protruding piece 24 together is an example.

[0105] As a location for thermally connecting the heat-generating element 100 in the base plate 50, an example is the heat sink 1, in which the heat-generating element 100 is thermally connected in such a way that the second heat sink 20 is arranged at a position that coincides with the position where the heat-generating element 100 is viewed from above. That is, an example is the heat-generating element 100 being thermally connected in the heat sink assembly 19 at a position that coincides with the position 40 where the second heat sink 20 is located when viewed from above.

[0106] like Figure 2 , 3As shown, in the radiator 1, cooling air F is supplied to the fin assembly 19 along the extending direction of the first main surface 11 of the first heat sink 10 and the extending direction of the second main surface 21 of the second heat sink 20. That is, cooling air F is supplied to the fin assembly 19 along the extending direction of the surface of the base plate 50. In the radiator 1, the fan (not shown) for supplying cooling air F to the first heat sink 10 and the second heat sink 20 is not integrated with the radiator 1. In the radiator 1, in the flow direction of the cooling air F, the central part of the fin assembly 19 is the portion 40 where the second heat sink 20 is present, and the two ends of the fin assembly 19 are portions 41 where the second heat sink 20 is not present.

[0107] The materials of the first heat sink 10 and the second heat sink 20 are not particularly limited; for example, copper, copper alloy, aluminum, aluminum alloy, stainless steel, and other metals can be used. Similarly, the material of the base plate 50 is not particularly limited; for example, copper, copper alloy, aluminum, aluminum alloy, stainless steel, and other metals can be used. The material of the container used in the heat pipe 30 is not particularly limited; for example, copper, copper alloy, aluminum, aluminum alloy, titanium, titanium alloy, stainless steel, and other metals can be used. Furthermore, the working fluid encapsulated in the container of the heat pipe 30 can be appropriately selected based on its compatibility with the container material; for example, water, fluorocarbons, cyclopentane, ethylene glycol, and mixtures thereof can be used.

[0108] Next, the manufacturing method of the heat sink assembly 19 of the heat sink 1 will be explained. Furthermore, Figure 10 This is an exploded perspective view of the heat dissipation section illustrating the arrangement of the first and second heat dissipation fins in the heat sink according to the first embodiment of the present invention.

[0109] like Figure 10 As shown, the first heat sinks 10 and the second heat sinks 20, having second through holes 22 and second protrusions 24, are overlapped to form a heat sink stacked structure 19' consisting of a plurality of first heat sinks 10, 10, 10... and a plurality of second heat sinks 20, 20, 20..., arranged between a plurality of first heat sinks 10 having first through holes 12 and first protrusions 14. In the radiator 1, the first heat sinks 10 and the second heat sinks 20 are alternately overlapped. At this time, the heat sink stacked structure 19' is formed such that the first through holes 12 and the second through holes 22 coincide when viewed from above, and the first protrusions 14 and the second protrusions 24 are located on the same surface.

[0110] Next, by riveting the first protrusion 14 of the first heat sink 10 and the second protrusion 24 of the second heat sink 20, a plurality of first heat sinks 10, 10, 10... and a plurality of second heat sinks 20, 20, 20... constituting the heat sink stacked structure 19' can be connected to create a heat sink assembly 19 with all heat sinks integrated into one structure.

[0111] Furthermore, by inserting the heat pipe 30 (the portion of the heat pipe 30 extending in a direction perpendicular to the surface of the base plate 50) mounted on the base plate 50 into the first through hole 12 and the second through hole 22 of the heat sink assembly 19 manufactured as described above, the heat sink 1 can be manufactured.

[0112] Next, the mechanism by which the radiator 1 of the first embodiment cools the heat-generating element 100 will be explained. Heat from the heat-generating element 100 is transferred to a base plate 50 thermally connected to the heat-generating element 100. The heat transferred to the base plate 50 is then transferred to the evaporation section of the heat pipe 30, which is thermally connected to the base plate 50. When heat is transferred from the base plate 50 to the evaporation section of the heat pipe 30, the heat transport system of the heat pipe 30 operates, and the heat absorbed by the evaporation section of the heat pipe 30 is transported from the evaporation section to the condensation section. The heat transported to the condensation section of the heat pipe 30 is transferred to the first heat sink 10 and the second heat sink 20, which are thermally connected to the condensation section of the heat pipe 30 and are subject to the flow of cooling air F, and then released from the first heat sink 10 and the second heat sink 20 to the external environment of the radiator 1.

[0113] In the radiator 1, the portion 40 of the heat sink assembly 19, which is a heat dissipation section and is close to the heat-generating element 100, has excellent heat exchange performance due to the large number of heat sink fins and the small spacing between them. On the other hand, the portion 41 of the heat sink assembly 19, which is farther from the heat-generating element 100 and lacks the second heat sink fin 20, has a larger spacing between its fins, thus reducing the pressure loss of the cooling airflow F. Therefore, in the radiator 1, the heat sink assembly 19 has excellent heat exchange performance and can reduce the pressure loss experienced by the cooling airflow F when flowing through the heat sink assembly 19, thus exhibiting excellent cooling characteristics. Furthermore, in the radiator 1, even if the area with a small spacing between the fins of the heat sink assembly 19 is limited to only a portion of the heat sink assembly 19, the pressure loss of the cooling airflow F can still be reduced. In addition, in the radiator 1, because the pressure loss of the cooling airflow F can be reduced, excellent cooling characteristics can still be exhibited even when the airflow of the cooling airflow F supplied to the heat sink assembly 19 is increased.

[0114] In addition, in the heat sink 1, the second main surface 21 of the second heat sink 20 is arranged in a position that coincides with the first main surfaces 11, 11, 11... of the plurality of first heat sinks 10, 10, 10... when viewed from above. Therefore, the heat exchange performance of the heat sink in the heat sink group 19, which serves as a heat dissipation unit, can be further improved.

[0115] In addition, in the radiator 1, the heat-receiving part of the radiator 1 is the base plate 50, and the first heat sink 10 and the second heat sink 20 are arranged side by side in a direction perpendicular to the surface of the base plate 50. Therefore, the heat of the heat-generating element 100 is released in the height direction of the heat-generating element 100. Thus, the heat of the heat-generating element 100 can be released from the radiator 1 to the external environment at the location where the heat-generating element 100 is installed.

[0116] In addition, in the radiator 1, the first heat sink 10 and the second heat sink 20 are thermally connected to the base plate 50 via the heat pipe 30. Therefore, through the heat transfer function of the heat pipe 30, the heat of the heating element 100 is actively transferred from the base plate 50 to the first heat sink 10 and the second heat sink 20, further improving the cooling characteristics of the radiator 1.

[0117] In addition, in the heat sink 1, the first main surface 11 of the first heat sink 10 has a first through hole 12, and the second main surface 21 of the second heat sink 20 has a second through hole 22. The heat pipe 30 is inserted into the first through hole 12 and the second through hole 22. Therefore, the thermal connection between the heat pipe 30 and the first heat sink 10 and the second heat sink 20 is improved, and heat conduction from the heat pipe 30 to the first heat sink 10 and the second heat sink 20 is smoother.

[0118] Furthermore, in the radiator 1, the periphery of the first main surface 11 of the first heat sink 10 has a first protrusion 14 protruding in the thickness direction of the first main surface 11, and the periphery of the second main surface 21 of the second heat sink 20 has a second protrusion 24 protruding in the thickness direction of the second main surface 21. By connecting the first protrusion 14 and the second protrusion 24 by riveting or the like, the first heat sink 10 and the second heat sink 20 are integrated. Therefore, the installation of the first heat sink 10 and the second heat sink 20 into the radiator 1 is simplified.

[0119] In addition, in the heat sink 1, a second heat sink 20 is arranged at a position that overlaps with the heat-generating body 100 when viewed from above. That is, since the spacing between the heat sink group 19 at the position that overlaps with the heat-generating body 100 when viewed from above is small, the heat exchange performance of the heat sink group 19, which serves as a heat dissipation part, is further improved.

[0120] Next, the radiator of the second embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the second embodiment is the same as that of the radiator of the first embodiment, the same reference numerals will be used to describe the same constituent elements as those of the radiator of the first embodiment. Figure 11 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the second embodiment of the present invention from the front.

[0121] In the first embodiment, the first heat sink 10 and the second heat sink 20 are alternately arranged in the radiator 1, but instead, as shown... Figure 11 As shown, in the radiator 2 of the second embodiment, a plurality of (in) first heat sinks 10 are arranged side by side at a predetermined interval. Figure 11 The second heat sink 20 consists of two pieces. Thus, in the heat sink of this invention, the number of second heat sinks 20 arranged between adjacent first heat sinks 10 can be appropriately selected according to the heat output of the heat-generating element being cooled and the degree of pressure loss of the cooling air.

[0122] In the heat sink assembly 19 of the heat sink 2, for example, the spacing between the fins of the portion 41 where the second heat sink 20 is not present is an integer multiple (e.g., 3 times) of the spacing between the fins of the portion 40 where the second heat sink 20 is present.

[0123] In the radiator 2, the heat exchange performance of the heat exchanger 19 is excellent in the part 40 of the heat exchanger 19 that is close to the heat-generating body and has a second heat exchanger 20, because there are many heat exchangers and the spacing between them is small. In the part 41 that is far away from the heat-generating body and does not have a second heat exchanger 20, the pressure loss of the cooling air is reduced because the spacing between them is large.

[0124] Next, the radiator of the third embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the third embodiment is the same as that of the radiators of the first and second embodiments, the same reference numerals will be used to describe the same constituent elements as those of the radiators of the first and second embodiments. Figure 12 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the third embodiment of the present invention from the front.

[0125] In the radiators 1 and 2 of the first and second embodiments, a second heat sink 20 is arranged between adjacent first heat sinks 10, but instead, as shown... Figure 12 As shown, in the heat sink 3 of the third embodiment, in addition to the first heat sink 10 and the second heat sink 20, there is also a flat plate-shaped third heat sink 60 having a third main surface 61. The area of ​​the main surface 61 of the third heat sink 60 is assumed to be smaller than the area of ​​the second main surface 21 of the second heat sink 20.

[0126] In the heat sink fin assembly 19 of the radiator 3, there are portions where a second heat sink 20 is disposed between adjacent first heat sinks 10 and portions where a third heat sink 60 is disposed between adjacent first heat sinks 10. In the radiator 3, there are portions where one second heat sink 20 is disposed between adjacent first heat sinks 10 and no third heat sink 60 is disposed, and portions where one third heat sink 60 is disposed between adjacent first heat sinks 10 and no second heat sink 20 is disposed. Based on the above, the radiator 3 is configured such that a portion of a plurality of second heat sinks 20, 20, 20… of the radiator 1 is replaced by a third heat sink 60.

[0127] The third heat sink 60 is disposed between adjacent plurality of first heat sinks 10, and its third main surface 61 coincides with the first main surface 11 of the first heat sink 10 when viewed from above. More specifically, the third heat sink 60 is disposed such that its third main surface 61 coincides entirely with the first main surface 11 of the first heat sink 10 and the second main surface 21 of the second heat sink 20 when viewed from above. In the radiator 3, in the heat sink assembly 19 which serves as a heat dissipation unit, there is a portion 40 where the second heat sink 20 is present and a portion 41 where the second heat sink 20 is not present. The portion 40 where the second heat sink 20 is present also contains the third heat sink 60.

[0128] Thus, in the radiator of this invention, depending on the heat output of the heat-generating element being cooled and the degree of pressure loss of the cooling air, a portion where a second heat-generating fin 20 is disposed and a portion where a third heat-generating fin 60 with an area smaller than the second main surface 21 of the second heat-generating fin 20 can be formed between adjacent first heat-generating fins 10. In the radiator 3, a portion of a plurality of second heat-generating fins 20, 20, 20... of the radiator 1 is replaced by a third heat-generating fin 60, thereby suppressing the pressure loss of the cooling air at the portion 40 where the second heat-generating fin 20 is located. Furthermore, the number of third heat-generating fins 60 in the heat-generating fin group 19 can be one or multiple.

[0129] In the heat sink 3, for example, a second heat sink 20 and a third heat sink 60 are arranged at a position that coincides with the position of the heat-generating element when viewed from above.

[0130] In the radiator 3, the portion 40 of the heat sink assembly 19 containing the second heat sink 20, which is close to the heat-generating element, has excellent heat exchange performance due to the large number of heat sink fins and the small spacing between them. Conversely, the portion 41, which is farther from the heat-generating element and lacks the second heat sink 20, has a larger spacing between the fins, thus reducing the pressure loss of the cooling air. Furthermore, in the radiator 3, since the third main surface 61 of the third heat sink 60 is positioned to coincide with the first main surface 11 when viewed from above, the heat sink assembly 19 also exhibits excellent heat exchange performance and further reduces the pressure loss experienced by the cooling air as it flows through the heat sink assembly 19.

[0131] Next, the radiator of the fourth embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the fourth embodiment is the same as that of the radiators of the first to third embodiments, the same reference numerals will be used to describe the same constituent elements as those of the radiators of the first to third embodiments. Figure 13 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink of the fourth embodiment of the present invention from the front.

[0132] In the radiator 3 of the third embodiment, the heat sink assembly 19 has a portion in which a second heat sink 20 is disposed between adjacent first heat sinks 10 and no third heat sink 60 is disposed there, and a portion in which a third heat sink 60 is disposed between adjacent first heat sinks 10 and no second heat sink 20 is disposed there, but instead, as Figure 13 As shown, in the radiator 4 of the fourth embodiment, a second heat sink 20 and a third heat sink 60 are arranged between adjacent first heat sinks 10. More specifically, a second heat sink 20 and a third heat sink 60 are arranged between adjacent first heat sinks 10. In the radiator 4, a third heat sink 60 is also present at the location 40 where the second heat sink 20 is present.

[0133] Thus, in the radiator of this invention, a structure can be constructed in which a second heat sink 20 and a third heat sink 60 having a main surface area smaller than the second main surface 21 of the second heat sink 20 are arranged between adjacent first heat sinks 10, depending on the heat output of the heat-generating element being cooled and the degree of pressure loss of the cooling air. In the radiator 4, since a structure is constructed in which a portion of a plurality of second heat sinks 20, 20, 20... of the radiator 2 is replaced by a third heat sink 60, the pressure loss of the cooling air at the portion 40 where the second heat sink 20 is located can also be suppressed.

[0134] In the heat sink 4, for example, a second heat sink 20 and a third heat sink 60 are arranged at a position that coincides with the position of the heat-generating element when viewed from above.

[0135] In the radiator 4, the portion 40 of the heat sink assembly 19 that is close to the heat source and has a second heat sink 20 has excellent heat exchange performance because of the large number of heat sinks and the small spacing between them. In the portion 41 that is far from the heat source and does not have a second heat sink 20, the large spacing between the heat sinks reduces the pressure loss of the cooling air.

[0136] Next, the radiator of the fifth embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the fifth embodiment is the same as that of the radiators of the first to fourth embodiments, the same reference numerals will be used to describe the same constituent elements as those of the radiators of the first to fourth embodiments. Figure 14 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink according to the fifth embodiment of the present invention from the front.

[0137] In the radiator 2 of the second embodiment, a plurality of (two) second heat sinks 20 are arranged side by side at a predetermined interval between adjacent first heat sinks 10, such as... Figure 14 As shown, in the radiator 5 of the fifth embodiment, a plurality of (two) second heat sinks 20 are arranged between adjacent first heat sinks 10, and a third heat sink 60 is also arranged between the plurality of (two) second heat sinks 20. In the radiator 5, a third heat sink 60 is also arranged between adjacent second heat sinks 20. In the radiator 5, a third heat sink 60 is also present at the location 40 where the second heat sinks 20 are present.

[0138] Thus, in the radiator of this invention, the number of second heat sinks 20 and third heat sinks 60 installed between adjacent first heat sinks 10 can be appropriately selected based on the heat output of the heat-generating element being cooled and the degree of pressure loss of the cooling air. In the radiator 5, pressure loss of the cooling air at the location 40 where the second heat sinks 20 are located can also be suppressed.

[0139] In addition, in the heat sink 5, for example, a second heat sink 20 and a third heat sink 60 are arranged at a position that overlaps with the heat-generating element when viewed from above.

[0140] In the radiator 5, the heat exchange performance of the heat exchanger 19 is excellent in the part 40 of the heat exchanger 19 that is close to the heat-generating body and has a second heat exchanger 20, because there are many heat exchangers and the spacing between them is small. In the part 41 that is far away from the heat-generating body and does not have a second heat exchanger 20, the pressure loss of the cooling air is reduced because the spacing between them is large.

[0141] Next, the radiator of the sixth embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the sixth embodiment is the same as that of the radiators of the first to fifth embodiments, the same reference numerals will be used to describe the same constituent elements as those of the radiators of the first to fifth embodiments. Figure 15 This is a front view of the radiator according to the sixth embodiment of this utility model.

[0142] In the above embodiments, in the flow direction of the cooling air F, the central part of the heat sink assembly 19 is the portion 40 where the second heat sink 20 is present, and the two ends of the heat sink assembly 19 are the portions 41 where the second heat sink 20 is not present. Figure 15 As shown, in the radiator 6 of the sixth embodiment, in the flow direction of the cooling air F, the central portion of the heat sink assembly 19 is a portion 41 where the second heat sink 20 is absent, and the two ends of the heat sink assembly 19 are portions 40 where the second heat sink 20 is present. That is, in the radiator 6, portions 40 where the second heat sink 20 is present are formed at the upper and lower ends of the cooling air F, respectively, across the central portion of the heat sink assembly 19. Corresponding to the following situation: in the radiator 6, the two ends of the base plate 50 in the flow direction of the cooling air F are thermally connected to a heat-generating element 100-1 with high heat generation, and the central portion in the flow direction of the cooling air F is thermally connected to a heat-generating element 100-2 with low heat generation.

[0143] Similar to radiator 1, in radiator 6, second heat sinks 20 are arranged between a plurality of first heat sinks 10, 10, 10... on each other. On the other hand, in radiator 6, in the direction of the flow of cooling air F, second heat sinks 20 are respectively installed at one end and the other end of the first heat sink 10 between the plurality of first heat sinks 10, 10, 10... on each other, and no second heat sink 20 is arranged in the center of the first heat sink 10.

[0144] Thus, in the radiator of this utility model, the location 40 of the second heat sink 20 of the heat sink assembly 19 and the location 41 of the absence of the second heat sink 20 can be appropriately changed such that the location 40 of the second heat sink 20 of the heat sink assembly 19 is located at the hot spot of the base plate 50.

[0145] In the radiator 6, the heat exchange performance of the heat exchanger 19 is excellent in the part 40 of the heat exchanger 19 that is close to the hot spot and has a second heat exchanger 20, because there are many heat exchangers and the spacing between them is small. In the part 41 that is far from the hot spot and does not have a second heat exchanger 20, the pressure loss of the cooling air is reduced because the spacing between them is large.

[0146] Next, the radiator of the seventh embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the seventh embodiment is the same as that of the radiators of the first to sixth embodiments, the same reference numerals will be used to describe the same constituent elements as those of the radiators of the first to sixth embodiments. Figure 16 This is a perspective view of the radiator according to the seventh embodiment of this utility model.

[0147] In the radiator 7 of the seventh embodiment, the heat-receiving portion of the radiator 7 replaces the base plate and becomes the evaporation portion of the heat pipe 70 located at one end 71. Furthermore, a condensation portion of the heat pipe 70 is provided at the other end 72, separated from the evaporation portion at one end 71 by an intermediate portion (insulation portion) 73. A heat sink assembly 19 having a first heat sink 10 and a second heat sink 20 is thermally connected to the condensation portion at the other end 72. The heat pipe 70 has one end 71, another end 72, and an intermediate portion 73 connecting one end 71 and the other end 72; the internal spaces of one end 71, the intermediate portion 73, and the other end 72 are interconnected. One end 71 of the heat pipe 70 is mounted on the surface of the heat-receiving block 110 and protected by a cover portion 111. A heat-generating element 100, intended for cooling, is thermally connected to the center of the back surface of the heat-receiving block 110. The heat pipe 70 is a heat transport member whose internal space is sealed and subjected to pressure reduction. A working fluid is sealed inside the heat pipe 70. The heat pipe 70 utilizes its heat transfer characteristics to transfer heat from the heating element 100 from the evaporation section to the condensation section.

[0148] In the heat sink 7, a plurality of heat pipes 70, 70, 70… are arranged side by side along the radial direction of the heat pipe 70. For each heat pipe 70, a bend is formed at the end 72 that is thermally connected to the heat sink assembly 19, extending along its length. Therefore, the plurality of heat pipes 70, 70, 70… are all approximately L-shaped. Furthermore, the bend of the heat pipe 70 on the right side is to the right, while the bend of the heat pipe 70 on the left side is to the left. That is, the bending directions of the bends of the heat pipes 70 on the right and the heat pipes 70 on the left are opposite.

[0149] The heat pipes 70, 70, 70... are arranged such that their other ends 72 extend in a direction substantially parallel to the length direction of the heat sink assembly 19 through a bend. In the heat sink 7, the other ends 72 of the heat pipes 70 reach the end of the heat sink assembly 19 in the length direction.

[0150] A plurality of first heat sinks 10, 10, 10... are arranged side-by-side with their first main surface 11 positioned approximately parallel to the extension direction of one end 71 of the heat pipe 70. Similarly, a plurality of second heat sinks 20, 20, 20... are arranged side-by-side with their second main surface positioned approximately parallel to the extension direction of one end 71 of the heat pipe 70. In the heat sink assembly 19, second heat sinks 20 are positioned between the plurality of first heat sinks 10. For ease of explanation, the first heat sinks 10 and second heat sinks 20 are arranged alternately in the radiator 7. In the heat sink assembly 19 of the radiator 7, the portion 41 located upwind of the cooling airflow F is where the second heat sink 20 is absent, and the portion 40 located downwind of the cooling airflow F is where the second heat sink 20 is present.

[0151] like Figure 16 As shown, the radiator 7 is provided with a plurality of heat pipes 70, 70, 70..., arranged such that the number of heat pipes 70 thermally connected to the first heat sink 10 and the second heat sink 20 is greater than the number of heat pipes 70 thermally connected only to the first heat sink 10. That is, the number of heat pipes 70 thermally connected to the portion 40 where the second heat sink 20 is present is greater than the number of heat pipes 70 thermally connected to the portion 41 where the second heat sink 20 is not present. Figure 16 For example, in the three heat pipes 70 on the right side, the second and third heat pipes 70 from the right are thermally connected to a first heat sink 10 and a second heat sink 20, while only the first heat pipe 70 from the right is thermally connected to the first heat sink 10. In the heat pipe 70 with the first heat sink 10 and the second heat sink 20 thermally connected, one end 71 is thermally connected to the heating element 100 via a heating block 110 near the heating element 100. Therefore, the heat load of the heat pipe 70 with the first heat sink 10 and the second heat sink 20 thermally connected is larger. On the other hand, in the heat pipe 70 with only the first heat sink 10 thermally connected, one end 71 is thermally connected to the heating element 100 via a heating block 110 away from the heating element 100. Therefore, the heat load of the heat pipe 70 with only the first heat sink 10 thermally connected is smaller.

[0152] The heat sink assembly 19, which serves as the heat dissipation part of the radiator 7, has a generally rectangular shape. The heat sink assembly 19 consists of two stacked structures: one heat sink assembly 19-1, which has a generally rectangular shape and alternately arranges first heat sinks 10 and second heat sinks 20 side by side; and another heat sink assembly 19-2, which is adjacent to the heat sink assembly 19-1 and has a generally rectangular shape and alternately arranges first heat sinks 10 and second heat sinks 20 side by side. Both the heat sink assembly 19-1 and the heat sink assembly 19-2 are configured to have a plurality of first heat sinks 10, 10, 10... and a plurality of second heat sinks 20, 20, 20... mounted on a flat support 75 and arranged side by side in a direction generally parallel to the length direction of the heat sink assembly 19.

[0153] One end 72, which serves as the condenser section of the heat pipe 70, is inserted between one heat sink assembly 19-1 and the other heat sink assembly 19-2. By arranging the other end 72 of the heat pipe 70 between one heat sink assembly 19-1 and the other heat sink assembly 19-2, the heat sink assembly 19 and the heat pipe 70 are thermally connected.

[0154] In the radiator 7, at the location 40 of the fin assembly 19 where the second fin 20 is thermally connected to the heat pipe 70 with a high heat load, the fin assembly 19 exhibits excellent heat exchange performance due to the large number of fins and small fin spacing. Conversely, at the location 41 where the second fin 20 is not present and is thermally connected to the heat pipe 70 with a low heat load, the large fin spacing reduces the pressure loss of the cooling airflow F. Therefore, in the radiator 7, the fin assembly 19 exhibits excellent heat exchange performance, reducing the pressure loss experienced by the cooling airflow F as it flows through the fin assembly 19, thus achieving superior cooling characteristics.

[0155] Furthermore, in the radiator 7, even if the heat-generating element 100 is installed in a small space where the heat sink assembly 19 cannot be installed, the heat pipe 70 can still transfer heat from the small space to the outside of the small space. Since heat can be dissipated through the heat exchange effect of the heat sink assembly 19 to the outside, it can also provide excellent cooling characteristics for the heat-generating element 100 installed in a small space.

[0156] In addition, in the radiator 7, the number of heat pipes 70 that are thermally connected to the first heat sink 10 and the second heat sink 20 is greater than the number of heat pipes 70 that are only thermally connected to the first heat sink 10, thereby enabling the heat load of the plurality of heat pipes 70, 70, 70... to be uniform and further improving the cooling characteristics of the radiator 7.

[0157] Next, the radiator of the eighth embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the eighth embodiment is the same as that of the radiators of the first to seventh embodiments, the same reference numerals will be used to describe the same constituent elements as those of the radiators of the first to seventh embodiments. Figure 17 This is a perspective view of the radiator according to the eighth embodiment of this utility model. Figure 18 This is a front view of the radiator according to the eighth embodiment of this utility model. Figure 19 This is an explanatory diagram showing the general arrangement of heat sinks in the radiator according to the eighth embodiment of the present invention from the front.

[0158] In the above embodiments, a plurality of heat pipes 30, 30, 30… of tubular bodies were used as heat conduction components, such as… Figure 17 , 18 As shown in Figures 1 and 19, in the radiator 8 of the eighth embodiment, a plurality of planar vapor chambers 80, 80, 80... are used as heat conduction components. Specifically, in the radiator 8, instead of the heat pipe 30 of the radiator 1 of the first embodiment, a vapor chamber 80 using a plate-shaped heat transport component is provided.

[0159] The portion of the heat spreader 80 mounted on the base plate 50 functions as an evaporator, while the portion extending perpendicular to the surface of the base plate 50 and thermally connected to a plurality of first heat sinks 10, 10, 10… and a plurality of second heat sinks 20, 20, 20… functions as a condenser. The heat spreader 80 is a heat transfer component whose internal space is sealed and depressurized. The internal space of the heat spreader 80 connects the evaporator to the condenser and is filled with a working fluid. Utilizing its heat transfer characteristics, the heat spreader 80 transfers heat from the heating element 100 from the evaporator to the condenser, i.e., from the base plate 50 to the plurality of first heat sinks 10, 10, 10… and the plurality of second heat sinks 20, 20, 20…

[0160] The shape of the heat transfer direction of the heat spreader 80 can be straight, L-shaped, U-shaped, etc., without particular limitation. The heat spreader 80 has a portion extending from the base plate 50 in a direction perpendicular to the surface of the base plate 50.

[0161] Similar to radiator 1, radiator 8 has a portion 40 in the center of fin assembly 19 where a second heat sink 20 is located, and portions 41 without the second heat sink 20 are formed at the upper and lower ends of the cooling airflow F, respectively, across the center of fin assembly 19. In radiator 8, corresponding to the position of the second heat sink 20 in fin assembly 19, a low-heat-generating element 100-2 is thermally connected to both ends of the base plate 50 in the flow direction of cooling airflow F, and a high-heat-generating element 100-1 is thermally connected to the center of the cooling airflow F.

[0162] In the radiator 8, the portion 40 of the fin assembly 19 containing the second heat sink 20, which is close to the high-heat-generating element 100-1, exhibits excellent heat exchange performance due to the large number of fins and their small spacing. Conversely, the portion 41 of the fin assembly 19, which is farther from the high-heat-generating element 100-1 and lacks the second heat sink 20, has a larger fin spacing, thus reducing the pressure loss of the cooling airflow. Furthermore, in the radiator 8, the first heat sink 10 and the second heat sink 20 are thermally connected to the base plate 50 via a heat spreader 80. Therefore, through the heat transfer function of the heat spreader 80, heat from the heating element 100 is actively transferred from the base plate 50 to the first heat sink 10 and the second heat sink 20, further improving the cooling characteristics of the radiator 1.

[0163] Next, the radiator of the ninth embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, since the main structure of the radiator of the ninth embodiment is the same as that of the radiators of the first to eighth embodiments, the same reference numerals will be used to describe the same constituent elements as those of the radiators of the first to eighth embodiments. Figure 20 This is a perspective view of the radiator according to the ninth embodiment of this utility model. Figure 21 This is a front view of the radiator according to the ninth embodiment of this utility model. Figure 22 This is an explanatory diagram showing the general arrangement of the heat sink fins in the heat sink according to the ninth embodiment of the present invention from the front.

[0164] In the first to seventh embodiments, a plurality of tubular heat pipes 30, 30, 30… were used as heat conduction components, but as… Figure 20 , 21 As shown in Figures 22 and 23, in the radiator 9 of the ninth embodiment, a plurality of heat exchange plates 80, 80, 80... of a planar shape are used as heat conduction members. Specifically, in the radiator 9, instead of the heat pipe 30 of the radiator 6 of the sixth embodiment, a heat exchange plate 80 of a plate-shaped heat transport member is used.

[0165] Based on the above, in the radiator 9, in the flow direction of the cooling air F, the central part of the heat sink assembly 19 is a portion 41 where the second heat sink 20 is not present, while the two ends of the heat sink assembly 19 are portions 40 where the second heat sink 20 is present. Specifically, in the radiator 9, across the central part of the heat sink assembly 19, portions 40 where the second heat sink 20 is present are formed at the upper and lower ends of the cooling air F, respectively. Corresponding to the following situation: in the radiator 9, a high-heat-generating heat source 100-1 is thermally connected to both ends of the base plate 50 in the flow direction of the cooling air F, and a low-heat-generating heat source 100-2 is thermally connected to the central part in the flow direction of the cooling air F.

[0166] In the radiator 9, the portion 40 of the fin assembly 19 near the second fin 20, which is close to the heat-generating element 100-1 and has a high heat output, exhibits excellent heat exchange performance due to the large number of fins and small spacing between them. Conversely, the portion 41, which is farther from the heat-generating element 100-1 and lacks the second fin 20, has a larger spacing between the fins, thus reducing the pressure loss of the cooling airflow. Furthermore, in the radiator 9, since the first fin 10 and the second fin 20 are thermally connected to the base plate 50 via a heat spreader 80, the heat from the heat-generating element 100 is actively transferred from the base plate 50 to the first fin 10 and the second fin 20 through the heat transfer function of the heat spreader 80, further improving the cooling characteristics of the radiator 1.

[0167] Next, other embodiments of the radiator of this utility model will be described. In the radiator 7 of the seventh embodiment described above, the heat sink assembly 19 has a first heat sink 10 and a second heat sink 20. However, instead, it may also include a third heat sink with a main surface area smaller than the second main surface 21 of the second heat sink 20. In the above-described manner, a third heat sink may also be arranged between adjacent first heat sinks 10, and a third heat sink may also be arranged between adjacent second heat sinks 20.

[0168] Industrial availability

[0169] The heat sink of this invention can exert excellent cooling performance on heat-generating elements with high heat output. Therefore, it can be used in a wide range of fields, such as cooling electronic components mounted on railway vehicles, aircraft, automobiles and other mobile bodies, electronic devices, servers and other electronic devices.

[0170] Explanation of reference numerals in the attached figures

[0171] Radiators 1, 2, 3, 4, 5, 6, 7, 8, 9

[0172] 10 First heatsink

[0173] 11 First Main Surface

[0174] 20 Second heat sink

[0175] 21 Second Main Surface

[0176] 30 and 70 heat pipes

[0177] 50 base plate

[0178] 80 heat spreader

Claims

1. A radiator, wherein, have: The heated part is thermally connected to the heating element; A flat first heat sink is thermally connected to the heated part and has a first main surface; as well as A flat, second heat sink is thermally connected to the heated portion and has a second main surface, the area of ​​which is smaller than the area of ​​the first main surface. The second heat sink is disposed between a plurality of the first heat sinks at positions where the second main surface coincides with the first main surface when viewed from above. The second heat sink is positioned at the location where it coincides with the heat-generating body when viewed from above. The heat sink assembly includes the first heat sink and the second heat sink. In the heat sink assembly, when viewed from above, the portion where the second heat sink is not present is farther from the heat-generating element than the portion where the second heat sink is present.

2. The radiator according to claim 1, wherein, The heating element that is thermally connected to the heated part is one.

3. The radiator according to claim 1 or 2, wherein, The second main surface of the second heat sink is configured such that, when viewed from above, it overlaps with the first main surface of the plurality of first heat sinks.

4. The radiator according to claim 1 or 2, wherein, The heated part is a flat base plate, and the first heat sink and the second heat sink are arranged side by side at a predetermined interval in a direction perpendicular to the surface of the base plate.

5. The radiator according to claim 1 or 2, wherein, The first heat sink and the second heat sink are thermally connected to the heated part via a heat conduction component.

6. The radiator according to claim 5, wherein, The first main surface has a first through hole formed in the thickness direction of the first main surface, and the second main surface has a second through hole formed in the thickness direction of the second main surface. The heat conduction member is inserted into the first through hole and the second through hole.

7. The radiator according to claim 5, wherein, The heat conduction component is a heat pipe or a heat spreader.

8. The radiator according to claim 1 or 2, wherein, The heated section is the evaporation section of the heat pipe, and the heat insulation section of the heat pipe, which is continuous with the evaporation section, is provided with the condensation section. The first heat sink and the second heat sink are thermally connected to the condensation section.

9. The radiator according to claim 8, wherein, The heat pipes are provided in a plurality of form, and the number of heat pipes thermally connected to the first heat sink and the second heat sink is greater than the number of heat pipes thermally connected only to the first heat sink.

10. The radiator according to claim 1 or 2, wherein, The first heat sink and the second heat sink are connected and integrated by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit by connecting the first heat sink and the second heat sink in a single unit.

11. The radiator according to claim 1 or 2, wherein, The spacing between the plurality of the first heat sinks is an integer multiple of the spacing between the first heat sink and the second heat sink.

12. The radiator according to claim 1 or 2, wherein, It also has a flat third heat sink with a third main surface, the area of ​​which is smaller than the area of ​​the second main surface of the second heat sink.

13. The radiator according to claim 12, wherein, The third heat sink is positioned between the plurality of the first heat sinks and, when viewed from above, the third main surface coincides with the first main surface.

14. The radiator according to claim 12, wherein, The third main surface of the third heat sink is configured such that, when viewed from above, it coincides with the first main surface of the first heat sink and the second main surface of the second heat sink.

15. The radiator according to claim 12, wherein, The second heat sink and the third heat sink are located at the same position as the heat-generating body when viewed from above.

16. The radiator according to claim 1 or 2, wherein, The air supply fan used to supply cooling air to the first and second heat sinks is not integrated.

17. The radiator according to claim 1 or 2, wherein, The portion where the second heat sink is not located is positioned in a position that does not overlap with the heat-generating element when viewed from above.

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