JP2009026784A - Heat dissipating component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat dissipating component which is high in material yield, and can be freely formed in a variety of large and small shapes and can efficiently increase heat dissipation area, by using a plate material. <P>SOLUTION: The heat dissipating component has: at least one fin portion comprising a plurality of arrays of fins formed by making cuts in a predetermined shape in one plate material and raising cut portions; and connecting portions, the portions of the plate material, which connect the fins. The predetermined shape in which the cuts are made consists of two sides of adjacent hook shapes and/or three sides of adjacent U-shapes, and the plurality of arrays of fins formed by raising cut portions are in a nearly L shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention includes a heat dissipating component including a thin plate fin manufactured by processing a thin plate material, which is thermally connected to a heat generating component or the like to dissipate heat of the heat generating component, and particularly includes a heat receiving surface and a heat dissipating surface. The present invention relates to a heat radiating component including an integrated thin plate fin.

  In recent years, electronic devices have built-in high-power, highly-integrated components such as CPUs. Various electronic components such as semiconductor elements have a very high degree of integration and perform processing such as calculation and control of information at high speed, and thus generate a large amount of heat. In addition, the number of devices that generate heat is increasing in other devices, and heat dissipation treatment is an important issue in these devices.

  Various heat sinks are used to process the heat generated by these devices. For example, there are a heat sink in which a base plate portion and a heat radiating fin portion are integrally formed by extrusion molding, a heat sink in which a separately manufactured metal base plate and a metal heat radiating fin are combined, and the like. In other words, a heat sink combining a separately manufactured metal base plate and metal heat dissipating fin is soldered with a plurality of thin heat dissipating fins on the other surface of the base plate to which the heat generating element is thermally connected to one surface. It is a heat sink formed by bonding with the like. In addition, there is a heat sink that inserts a thin plate fin into a groove portion of a base plate having a plurality of groove portions, mechanically caulks the peripheral portion of the groove portion, and joins the heat radiating fins to the base plate.

  Furthermore, there is a heat radiating portion formed of a substantially U-shaped member including an upper surface portion, a bottom surface portion, and a connection portion that connects the upper surface portion and the bottom surface portion, which are integrally formed of members having excellent heat dissipation. A heating element or the like is thermally connected to the bottom surface of the heat radiating portion. Furthermore, a heat sink is known in which a plurality of the heat radiating portions thus formed are connected in parallel by, for example, a claw portion and a claw receiving portion, and the bottom surface portion forms a flat heat receiving surface as a whole.

  A method of cooling a heat generating element is widely known by combining a heat sink as described above and a fan for forced cooling, and blowing cool air between radiating fins to which heat of the heat generating element is transmitted.

Further, when the heat generating element and the heat radiating fin are separated from each other, the heat generating element and the heat radiating fin are thermally connected by the heat pipe, and the heat of the heat generating element is disposed at another position by the heat pipe. It is also known to move to the radiating fin and cool by a cooling fan.
JP 2005-38985 A

Of the conventional heat sinks described above, when forming fins, the manufacturing cost is reduced by punching several small fins and connecting them to each other or joining them to other members to form the overall shape. However, there is a problem in that it tends to be high and a lot of excessive parts are likely to be produced. Further, the heat sink by extrusion molding has a problem that the manufacturing cost is likely to increase if the thickness of the fin is reduced, for example, due to manufacturing restrictions.
When a large number of cuts are made using a single plate material and the heat sink is formed by cutting and raising the portion, there is an advantage that the manufacturing cost is reduced because the heat sink can be formed from a single plate material, The size and number of fins cut and raised are restricted by the size of the original plate material, and there is a problem that it is difficult to realize a high-performance heat sink by increasing the heat radiation area.

  Accordingly, an object of the present invention is to provide a heat dissipating part that can increase the heat dissipating area efficiently by using a plate material with high material yield, freely realizing various shapes.

  The inventor conducted extensive research to solve the conventional problems. As a result, a notch with a predetermined shape (for example, two notches on the adjacent saddle shape or three notches on the adjacent U-shape) is cut into one plate material, and the cut portion is raised. When the fin portion is formed, a fin portion composed of a plurality of substantially L-shaped fins and a connecting portion that connects the fin portions are formed, and a heat dissipation component with a high material yield can be obtained from a single plate material. found.

  Further, when the above-described fin portion and the plate material provided with the opening formed by cutting and raising the fin portion are overlapped so that the fin portion is inserted into the opening, a plurality of sheets can be stacked, and the surface area can be increased. It has been found that it is possible to easily obtain a large heat radiation component. Further, since it is formed by cutting a single plate material and raising the cut portion, it has been found that a large and small heat radiating component can be easily and freely manufactured.

  According to a first aspect of the heat-dissipating component of the present invention, at least one fin portion comprising a plurality of fin rows formed by cutting a predetermined shape into a single plate member and raising the cut portion, It is a heat radiating component provided with the connection part which is a part of the said board | plate material which connects between fins.

  According to a second aspect of the heat-dissipating component of the present invention, the predetermined shape into which the cut is made comprises two adjacent saddle-shaped two sides and / or three adjacent U-shaped three sides, and the cut portion The heat dissipating component is characterized in that the shape of each of the plurality of fin rows formed by raising the shape is substantially L-shaped.

  According to a third aspect of the heat dissipating component of the present invention, the plurality of fins is a first fin formed by fins formed by making cuts in the two adjacent sides of the bowl shape and raising the cut portions. And a second fin portion made of a fin formed by cutting the three sides of the adjacent U-shape and raising the cut portion, and the connecting portion is the first fin portion and the first fin portion. The heat dissipating part is characterized by connecting two fin portions.

  According to a fourth aspect of the heat dissipation component of the present invention, the connecting portion is formed of a band-shaped portion of the plate material having a predetermined width excluding the formed fin portion, and each fin of the first fin portion, and Each of the fins of the second fin portion is a heat dissipating component, which is disposed at each end portion on both sides of the strip portion along the longitudinal direction of the strip portion.

  According to a fifth aspect of the heat dissipation component of the present invention, the connecting portion includes at least two band-shaped portions, and the first fin portion is provided at an outer side end portion of the outermost band-shaped portion. The heat dissipating component is characterized in that the second fin portion is provided at an inner side end portion of the belt-shaped portion.

  A sixth aspect of the heat dissipating part of the present invention is a heat dissipating part characterized in that the fin rows of the plurality of second fin parts arranged in parallel are alternately arranged in the belt-like portion.

  A seventh aspect of the heat dissipation component of the present invention is a heat dissipation component characterized in that the top portion of each fin is bent to form an upper surface portion.

  According to an eighth aspect of the heat dissipation component of the present invention, the heat dissipation component is characterized in that a part of the cut is shortened and a fixing portion formed on the remaining portion is fixed to the heat generating component. It is.

  According to a ninth aspect of the heat dissipation component of the present invention, a space between the fins formed by raising the cut portion of the heat dissipation component formed from the one plate material is formed from another plate material. The heat dissipating component is characterized in that the fins of the heat dissipating component are stacked so as to be disposed.

  A tenth aspect of the heat dissipation component of the present invention is a heat dissipation component characterized in that the one sheet material and the another sheet material are made of the same material.

  An eleventh aspect of the heat dissipation component of the present invention is a heat dissipation component characterized in that the one sheet material and the another sheet material are made of different materials.

  In a twelfth aspect of the heat dissipation component of the present invention, the height of the fin portion of the one sheet material is different from the height of the fin portion of the another sheet material, and the one sheet material and the another plate material are different from each other. The heat dissipating component is characterized in that the height is substantially the same when a single plate is overlapped.

  A first aspect of the heat dissipation structure of the present invention is a heat dissipation structure characterized in that the above-described heat dissipation component is disposed along a planar cooled component.

  According to a second aspect of the heat dissipation structure of the present invention, the component to be cooled is a mounting plate material on which a plurality of LEDs are mounted.

  According to a third aspect of the heat dissipation structure of the present invention, the component to be cooled is a reflection plate of a display device provided with a backlight.

  According to the present invention, when a notch of a predetermined shape is cut into a single plate member, and the fin portion is formed by raising the notched portion, a fin portion consisting of a plurality of substantially L-shaped fins, and the fin portion As a result, a heat radiating component having a high material yield can be obtained from a single plate. Furthermore, when the fin portion and the plate member provided with the opening formed by cutting and raising the fin portion are overlapped so that the fin portion is inserted into the opening, a plurality of sheets can be stacked, and the surface area is increased. And large heat dissipation parts can be easily obtained. Further, since it is formed by cutting a single plate material and raising the cut portion, it is possible to easily and freely manufacture various large and small heat dissipating parts.

The heat radiating component of the present invention will be described in detail with reference to the drawings.
One aspect of the heat dissipating component of the present invention includes a fin having at least one fin formed of a plurality of fins formed by cutting a predetermined shape into a single plate member and raising the cut portion. It is a heat radiating component provided with the connection part which is a part of board | plate material which connects between. The predetermined shape to be cut is composed of two adjacent sides of the saddle shape and / or three sides of the adjacent U-shape, and each of the plurality of fin rows formed by raising the cut portions. The shape is generally L-shaped.

FIG. 1 is a perspective view for explaining one embodiment of the heat dissipating component of the present invention.
The heat dissipating component of the present invention includes a plurality of fin rows formed by cutting a predetermined shape, for example, a bowl shape or a U shape, into a single plate material, and vertically raising the cut portion. And a connecting portion that is a part of the plate material. That is, the portions other than the fins that are cut and raised vertically are the connecting portions of the same plate material.

  Specifically, as shown in FIG. 1, the heat dissipating component 1 according to one aspect of the present invention is formed by incising two adjacent scissors-shaped sides and raising the incised portions. A first fin portion 2 composed of a row of a plurality of fins 21 and a second fin composed of a row of a plurality of fins 31 formed by incising three adjacent sides of the U-shape and raising the cut portions. The fin part 3 and the connection part 4 which connects the 1st fin part 2 and the 2nd fin part 3 are provided.

  In the heat dissipation component of the aspect shown in FIG. 1, the first fin portion 2 composed of a row of a plurality of fins 21 is arranged on both outer portions, and a plurality of fins 31 are arranged between the two first fin portions 2. The 2nd fin part 3 which becomes and the connection part 4 of a strip | belt-shaped part is arrange | positioned between the 1st fin part 2 and the 2nd fin part 3, respectively. Each fin of the 1st fin part 2 and each fin of the 2nd fin part are arrange | positioned in the position mutually displaced along the longitudinal direction of the strip | belt-shaped part. For example, the first fin portion 2 is arranged so that the extended line of the long axis of the fin 21 of the first fin portion 2 is approximately at the center of the opening 34 between the two fins 31 of the second fin portion 3. These are arranged so that the extended line of the major axis of the fin 31 of the second fin portion 3 comes to the approximate center of the opening 24 between the two fins 21, 21.

  In the aspect shown in FIG. 1, on the outermost side, a first fin portion formed by cutting two adjacent sides of the bowl shape and raising the cut portion is disposed, and between the first fin portions, Incisions are made in the three sides of the adjacent U-shape, and the second fin portions of one row formed by raising the notched portions are arranged, but the first fin portions are arranged on the outermost side, Multiple rows of second fin portions may be arranged between the first fin portions.

  FIG. 2 is a diagram for explaining a state in which a sheet is cut. FIG. 3 is a partially enlarged view for explaining a state in which a cut is made and the cut portion is raised to form a fin. With reference to FIG. 2 and FIG. 3, the process of producing a heat radiating component from one plate material will be described.

  As shown in FIG. 2, the heat radiating component is formed of a single plate material. For example, two types of cuts are made in the thin plate 10 having excellent thermal conductivity such as copper and aluminum. That is, the outer side portion of the plate material is cut into two adjacent sides a and b of the bowl shape. In the inner part of the plate material, incisions are made in the adjoining U-shaped three sides c, d, e.

  The first fin portion cut into the adjacent two sides a and b of the saddle shape raises a portion cut along f indicated by a dotted line, and the adjacent U-shaped three sides c, d, and e The second fin portion into which the cut is made raises the portion cut along h indicated by a dotted line. In addition to the notches shown in FIG. 2, although not shown in the drawing, incisions are made on the two outer sides of the adjacent fins for the first fin portion between the two first fin portions. A plurality of cuts may be formed in parallel on three sides of the adjacent U-shape for the fin portion.

  Next, as shown in FIG. 3, the portions where the adjacent scissors-shaped two sides a and b shown in FIG. 2 are cut are raised vertically as indicated by arrows. The fin 21 formed in this way is a generally L-shaped thin plate fin composed of a bottom surface portion 22 and a vertical surface portion 23. Since one end portion of the bottom portion is not cut, it remains integral with the connecting portion 4 of the belt-like portion. In this way, a row of generally L-shaped thin fins is formed along the longitudinal direction of the belt-like portion. This is the first fin portion.

  As shown by the arrows, the portions formed by cutting the adjacent U-shaped three sides c, d, e shown in FIG. 2 on the opposite side of the first fin portion with respect to the band-shaped portion are raised vertically. The fin 31 formed in this way is a generally L-shaped thin plate fin composed of a bottom surface portion 32 and a vertical surface portion 33. An uncut bottom surface 32 remains integral with the two strips. In this way, a generally L-shaped row of thin fins is formed along the longitudinal direction sandwiched between the two belt-like portions. This is the second fin portion.

  As shown in FIG. 3, a plurality of fin rows can be easily formed by simply making a predetermined cut into a single plate and raising the cut vertically. The height of the fin (that is, the height of the vertical surface portion) and the width of the bottom surface portion can be appropriately set according to the purpose of use. The kind of board | plate material and the thickness of board | plate material can be suitably set in consideration of desired intensity | strength. Although the board | plate material has shown the example of the rectangular board | plate material, it can set suitably, without being limited to a rectangle. The shape of the cut does not need to be limited to the two sides of the adjacent saddle shape and the three sides of the adjacent U-shape, and can be set as appropriate.

FIG. 4 is a diagram for explaining a situation in which a heat radiating component is manufactured by overlapping two heat radiating components manufactured as described above.
As shown in FIG. 4, the two heat dissipating components 1-1 and 1-2 are overlapped. That is, a first fin portion 2-2 composed of a row of a plurality of fins 21-2 formed by cutting two adjacent sides of the bowl and raising the cut portion, and an adjacent U-shaped A second fin portion 3-2 including a row of a plurality of fins 31-2 formed by making cuts on three sides and raising the cut portions, a first fin portion 2-2, and a second fin portion 3 A plurality of fins 21-1 formed by cutting the heat dissipating component 1-2 including the connecting portion 4-2 for connecting -2 into two adjacent sides of the bowl shape and raising the cut portions A first fin portion 2-1 composed of a plurality of rows and a second fin composed of a row of a plurality of fins 31-1 formed by incising three adjacent sides of the U-shape and raising the cut portions. The connection part 4- which connects the part 3-1, the 1st fin part 2-1, and the 2nd fin part 3-1. As indicated by the arrow from the lower heat radiator 1-1 and a is superimposed.

  That is, each of the radiating fins 21-2 of the radiating component 1-2 is located approximately at the center of the corresponding opening 24-1 between the adjacent radiating fins 21-1 of the radiating component 1-1. The two heat dissipating components 1-1 and 1-2 are overlapped so that each of 31-2 is positioned at a substantially central portion of the corresponding opening 34-1 between the adjacent heat dissipating fins 31-1. At this time, the connecting portions 4-1 and 4-2, which are the respective band-like portions of the two heat dissipating components 1-1 and 1-2, are overlapped. The heat dissipation component formed in this way has a density of heat dissipation fins approximately twice as high.

  FIG. 5 is a partially enlarged view illustrating a state in which two heat dissipating components 1-1 and 1-2 are overlapped. As shown in FIG. 5, when the two heat radiation components 1-1 and 1-2 having the same shape are overlapped, the connecting portions 4-1 and 4-2 of the belt-shaped portions are overlapped. From the same surface as the connection part 4-1 of the heat radiation component 1-1, the heat radiation fins 21-1 of the first fin part 2-1 and the heat radiation fins 31-1 of the second fin part 3-1 are raised substantially vertically. . The radiating fins 21-2 of the first fin portion 2-2 and the radiating fins 31-2 of the second fin portion 3-2 are generally arranged from the same surface as the connecting portion 4-2 of the radiating component 1-2 located on the lower side. Standing up vertically.

  As described above, each of the heat radiating fins 21-2 of the heat radiating component 1-2 is located approximately at the center of the corresponding opening 24-1 between the adjacent radiating fins 21-1 of the heat radiating component 1-1. Each of the radiating fins 31-2 is located substantially at the center of the corresponding opening 34-1 between the adjacent radiating fins 31-1. When the heat radiation fins have the same height by overlapping the two heat radiation components 1-1 and 1-2, the height of the heat radiation fin of the lower heat radiation component is the same as that of the heat radiation fin of the upper heat radiation component. It is lower than the height by the thickness of the plate material. Therefore, in order to make the height of the heat radiating fins the same in the state where the two heat radiating components 1-1 and 1-2 are overlapped, in order to increase the height of the heat radiating fin of the lower heat radiating component. Adjust the size of the notch.

FIG. 6 is a perspective view for explaining another aspect of the heat dissipation component of the present invention. In this aspect, each upper end part of the radiation fin is bent to form an upper surface part. That is, as described with reference to FIG. 2, the first fin portion 2 cut into the two adjacent sides a and b of the bowl shape raises the portion cut along f indicated by the dotted line, Further, the upper end portion is bent to form the upper surface portion. The radiating fin 21 formed in this manner includes a bottom surface portion 22, a vertical surface portion 23, and an upper surface portion 25. Similarly, the second fin portion 3 cut into the three sides c, d, and e of the adjacent U-shape raises a portion cut along h indicated by a dotted line, and the upper end portion is further bent. An upper surface portion is formed. The radiating fin 31 thus formed includes a bottom surface portion 32, a vertical surface portion 33, and a top surface portion 35.
As described with reference to FIG. 4 and FIG. 5, the heat radiating component 1 of this aspect can also overlap two or more heat radiating components.
Furthermore, as shown in FIG. 6, the length of the cut may be shortened, and a fixing part 50 formed in the remaining part and fixed to the heat-generating component may be provided.

  As described above, a variety of (for example, large-size) one plate material is cut, the portion is raised to form a fin, and another plate material formed with a fin in the same manner, and the fin portion formed by cutting and raising By laminating so as to come to the position of the gap of another plate material, a plurality of plate materials can be laminated while improving the material yield at the time of production per sheet. A plurality of sheets may be stacked, a heat pipe may be sandwiched between the plate materials, or the material and thickness of each plate material may be different. Further, louvers or embossing may be applied to the surface of the fin to improve thermal characteristics or improve strength. Furthermore, radiation characteristics may be improved such as black coating or anodized coating, or heat conduction may be improved by DLC vapor deposition.

  Furthermore, when sandwiching the heat pipe, the plate material may be provided with a recess to improve the thermal connection, or the positions of the combined raised portions (fin portions) may be aligned, or conversely Good.

  In addition, as described above, not only a plurality of layers are laminated to form a heat dissipation component, but also a single plate material is bent into a U shape, and the cut-and-raised portion (fin portion) of the opposing portion is located in the other party's gap. (I.e., cutting the fins of the lower plate material folded into a U shape in the same direction as the upper side and positioning it in the gap between the upper plate materials), the same effect as when stacked It can be demonstrated. At this time, the performance can be further improved by sandwiching the heat pipe between the folded plate members.

  When a heat pipe is used, a larger heat radiating component (heat sink) can be formed by thermally connecting a plurality of laminated portions to a long heat pipe at the same time.

  According to the present invention, by using a plate material, there is provided a heat dissipating component that has a high material yield, can freely realize various shapes, large and small, and can efficiently increase the heat dissipating area.

FIG. 1 is a perspective view for explaining one embodiment of the heat dissipating component of the present invention. FIG. 2 is a diagram for explaining a state in which a sheet is cut. FIG. 3 is a partially enlarged view for explaining a state in which a cut is made and the cut portion is raised to form a fin. FIG. 4 is a diagram for explaining a situation in which a heat radiating component is manufactured by overlapping two heat radiating components manufactured as described above. FIG. 5 is a partially enlarged view illustrating a state in which two heat dissipating components 1-1 and 1-2 are overlapped. FIG. 6 is a perspective view for explaining another aspect of the heat dissipation component of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat radiation component 2 1st fin part 3 2nd fin part 4 Connection part 10 Board | plate material 21 Radiation fin 22 Bottom face part 23 Vertical surface part 24, 34 Opening part 31 Radiation fin 32 Bottom face part 33 Vertical surface part

Claims (15)

  A part of the plate material that connects between the fins and at least one fin portion formed of a plurality of rows of fins formed by cutting a predetermined shape into one plate material and raising the cut portion. A heat dissipating part having a connecting part.   The predetermined shape to be cut is composed of two adjacent saddle-shaped two sides and / or three adjacent U-shaped three sides, and a plurality of fin rows formed by raising the cut portions. The heat-radiating component according to claim 1, wherein each shape is substantially L-shaped.   The row of the plurality of fins is cut into two sides of the adjacent saddle shape, a first fin portion formed of fins formed by raising the cut portion, and the three sides of the adjacent U-shape A second fin portion made of fins formed by raising the cut portion and forming the cut portion, wherein the connecting portion connects the first fin portion and the second fin portion, The heat dissipating component according to claim 2.   The connecting portion is composed of a band-shaped portion of the plate material having a predetermined width excluding the formed fin portion, and each fin of the first fin portion and each fin of the second fin portion are The heat dissipating component according to claim 3, wherein the heat dissipating component is disposed at each of both end portions along the longitudinal direction of the belt-like portion.   The connecting portion is composed of at least two band-shaped portions, each including the first fin portion at an outer side end portion of the outermost band-shaped portion, and an inner side end portion of the band-shaped portion. The heat dissipating component according to claim 3, further comprising the second fin portion.   The heat dissipating component according to claim 5, wherein the fin rows of the plurality of second fin portions arranged in parallel are alternately arranged in the belt-like portion.   The heat dissipating component according to claim 1, wherein a top portion of each fin is bent to form an upper surface portion.   The length of a part of said notches is shortened, The fixing | fixed part fixed to a heat-emitting component formed in the remaining part is provided, The any one of Claim 1 to 7 characterized by the above-mentioned. Heat dissipation component.   The fin portion of the heat dissipation component formed from another plate is arranged in the space between the fins formed by raising the cut portion of the heat dissipation component formed from the one plate. The heat dissipating component according to claim 1, wherein the heat dissipating component is laminated in a stacked manner.   The heat radiating component according to claim 9, wherein the one sheet material and the another sheet material are made of the same material.   The heat radiating component according to claim 9, wherein the one sheet material and the another sheet material are made of different materials.   The height of the fin portion of the one plate material is different from the height of the fin portion of the another plate material, and when the one plate material and the another plate material are overlapped, The heat dissipating part according to claim 9, wherein the heat dissipating parts have the same height.   A heat dissipating structure, wherein the heat dissipating component according to any one of claims 1 to 12 is arranged so as to be along a planar cooled component.   The heat dissipation structure according to claim 13, wherein the component to be cooled is a mounting plate material on which a plurality of LEDs are mounted.   The heat dissipation structure according to claim 13, wherein the component to be cooled is a reflection plate of a display device including a backlight.

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