JP2019125669A - heatsink - Google Patents

Abstract

To provide a heatsink capable of efficiently cooling.SOLUTION: The heatsink includes: a heatsink body having a base portion, and a plurality of fins provided on the base portion at mutually spaced intervals in a predetermined direction; and a heatsink plate, having a plurality of slits into which each of the plurality of fins is insertable, engaged with the heatsink body by inserting the plurality of fins into the plurality of slits.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat sink.

  Conventionally, a heat sink is known as a cooling device for cooling a circuit element or the like that generates heat, such as a driver IC (see, for example, Patent Document 1). In the heat sink, for example, a plurality of plate-like fins are erected on a base portion joined to a heat generating member such as an element, and the plurality of fins are provided parallel to each other with a space therebetween.

Unexamined-Japanese-Patent No. 2004-126151

The heat sink as described above can be efficiently cooled by the air flow passing between the fins by natural convection when the plurality of fins are arranged along the vertical direction, but depending on the installation environment, the base portion is horizontal May need to be arranged to When the base portion is arranged to be horizontal, it is difficult to obtain the flow velocity of the air flow passing between the fins, so it is difficult to efficiently cool the object to be cooled. In order to improve the cooling performance, it is conceivable to forcibly increase the flow velocity using a fan, but there is a problem that the installation space is increased and the cost is increased, and the object to be cooled can not be cooled efficiently.
The present invention has been made in view of such problems, and an object of the present invention is to provide a heat sink that can be efficiently cooled.

  In order to achieve such an object, the heat sink of the present invention comprises: a heat sink body having a base portion and a plurality of fins provided on the base portion spaced apart from each other in a predetermined direction; and each of the plurality of fins is inserted And a heat sink plate having a plurality of possible slits, and the plurality of fins being inserted into the plurality of slits and engaged with the heat sink body.

  In such a heat sink, the heat sink plate can be disposed at the center in a cross direction crossing the predetermined direction.

  In the heat sink, the heat sink plate may be inserted into each of the plurality of fins, and a recess may be provided on the base portion side.

  In the heat sink, the heat sink plate can be detachably attached to the heat sink body.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the heat sink which can be cooled efficiently.

It is a perspective view showing a heat sink concerning one embodiment of the present invention. It is a perspective view showing a heat sink body and a heat sink board.

One embodiment of the present invention will be described below with reference to the accompanying drawings.
The heat sink 1 according to an embodiment of the present invention is used, for example, by bonding to an element or the like that generates heat with an adhesive excellent in thermal conductivity, a screw made of metal, or the like.

  The heat sink 1 has a heat sink main body 2 joined to a heat generating element and the like, and a heat sink plate 3 detachably provided on the heat sink main body 2. The heat sink body 2 and the heat sink plate 3 are both made of aluminum. The heat sink body 2 and the heat sink plate 3 can also be formed of other heat conductive materials.

  The heat sink main body 2 has a rectangular plate-like base portion 2 a and a plurality of fins 2 b in a fin-like shape provided perpendicularly to one surface of the base portion 2 a. In the present embodiment, the plurality of fins 2b are provided along the longitudinal direction of the rectangular base portion 2a over the entire length, and are arranged side by side at intervals in the lateral direction.

  In the following description, in the state where the heat sink 1 is joined with the base portion 2a down on an element (not shown), that is, in the state as shown in FIG. The direction and the longitudinal direction of the base portion 2a are shown as the left and right direction, and the short direction of the base portion 2a is shown as the depth direction. Even in the individual parts of the heat sink 1 and in the individual state of each member constituting the heat sink 1, in the direction of the vertical direction, the horizontal direction, and the depth direction in the state combined as the heat sink 1 To identify and explain the direction. In the present embodiment, the depth direction corresponds to the cross direction, and the left and right direction corresponds to the predetermined direction.

  As shown in FIG. 2, at the upper end of each fin 2b, a concave portion 2c which is recessed toward the base portion 2a is provided at the center in the left-right direction. The recess 2 c is formed so that the width W 1 in the left-right direction is slightly larger than the thickness t 1 of the heat sink plate 3.

  The heat sink plate 3 has the same length L2 as the length L1 of the base portion 2a in the depth direction, and the width W2 in the vertical direction is equal to or greater than the height H of the fins 2b provided on the base portion 2a. It is widely formed. The heat sink plate 3 is provided with a plurality of slits 3a along the vertical direction at predetermined intervals in the depth direction.

  The interval P1 of the slits 3a coincides with the interval P2 at which the fins 2b are provided. The width W3 in the depth direction of the slit 3a is formed slightly smaller than the thickness t2 of the fin. The depth D1 of the slit 3a from the lower end of the heat sink plate 3 is equal to the distance between the upper surface of the base portion 2a and the bottom surface 2d of the recess 2c.

  The heat sink 1 is assembled by inserting the heat sink plate 3 between the plurality of fins 2b while inserting the fins 2b into the slits 3a of the heat sink plate 3 at the central portion in the left-right direction of the fins 2b. At this time, the heat sink plate 3 is inserted into the recess 2 c in which the portion 3 b forming the upper edge of the slit 3 a is provided at the upper end of the fin 2 b. Further, the heat sink plate 3 and the fins 2 b are combined in a light press-fit state, and the heat sink plate 3 and the fins 2 b are in close contact with each other. At this time, the lower end of the heat sink plate 3 is in contact with the upper surface of the base portion 2a.

  In the case of the conventional heat sink in which the heat sink plate 3 such as the heat sink 1 of the present embodiment is not provided, when the element joined to the lower surface of the base generates heat, the air in the vicinity of the heat sink is warmed up. At this time, since the air whose temperature is lower than that of the heat sink is present at the outer peripheral portion of the heat sink, the heat sink is also easily cooled by natural convection by the air flow in which the warmed air rises. On the other hand, at the center of the heat sink, the heat sink is hard to be cooled because convection is difficult to occur because it is surrounded by the heated heat sink and the high temperature air is stagnant. For this reason, it is difficult to efficiently cool the element joined to the heat sink.

  On the other hand, according to the heat sink 1 of the present embodiment, the outer peripheral portion of the heat sink 1 is cooled similarly to the conventional heat sink, and the heat dissipation area is increased by the heat sink plate 3 at the center side of the heat sink 1 The air is cooled more than without the heat sink plate 3. At this time, in the heat sink 1 in which the fins 2 b are arranged along the left-right direction, the air flow between the fins 2 b is hindered by the heat sink plate 3 even if the heat sink plate 3 is disposed in the direction intersecting with the fins 2 b. Instead, it is possible to provide the heat sink plate 3 and increase the amount of heat dissipation to increase the cooling efficiency while substantially maintaining the performance of the conventional heat sink. For this reason, it is possible to provide the heat sink 1 which can be cooled efficiently.

  Further, since the heat sink plate 3 is disposed at the center in the left-right direction, it is possible to cool the left side and the right side of the heat sink plate 3 similarly, and it is possible to cool in a well-balanced manner.

  Further, since the recess 2c into which the heat sink plate 3 is inserted is provided at the upper end of each fin 2b, the heat sink plate 3 can be easily disposed at the center of the fins 2b simply by arranging the heat sink plate 3 according to the recess 2c. Is possible. Here, the position of the recess 2c provided in the fin 2b is not limited to the center in the left-right direction, and may be provided at a desired position based on the position of the element, the arrangement of the heat generating portion, and the like. In this case, the heat sink plate 3 can be easily disposed at a desired position simply by arranging the heat sink plate 3 in accordance with the recess 2 c, and cooling can be performed more efficiently by increasing the heat release amount at the desired position. Is possible.

  Further, since the heat sink plate 3 is provided detachably with respect to the heat sink main body 2, when the fins 2b can be arranged along the vertical direction, the heat sink plate 3 is not used, and the fins 2b are laterally If it is necessary to arrange the heat sink plate 3, the heat sink plate 3 can be mounted and used. For this reason, since the presence or absence of the heat sink plate 3 can be changed according to the attitude | position of the heat sink 1 provided, it is possible to provide a highly versatile heat sink.

  Further, since the heat sink 1 has a cooling efficiency higher than that of the conventional heat sink by providing one heat sink plate 3, for example, a fan or the like for increasing the size of the fins 2b or forcibly cooling Without providing, it is possible to realize a more compact and cheaper cooling structure.

In the said embodiment, although the example in which the recessed part 2c was provided in the upper end of the fin 2b was demonstrated, the recessed part 2c does not necessarily need to be provided.
Moreover, in the said embodiment, although the example which the lower end of the heat sink plate 3 contact | abuts on the upper surface of the base part 2a was demonstrated, it does not necessarily need to contact | abut.

  The above embodiments are for the purpose of facilitating the understanding of the present invention, and are not for the purpose of limiting the present invention. It goes without saying that the present invention can be modified and improved without departing from the gist thereof, and that the present invention includes the equivalents thereof.

1 heat sink, 2 heat sink body, 2a base, 2b fins,
2c recess, 2d bottom, 3 heat sink plates, 3a slits,
3b The part that forms the upper edge of the slit

Claims (4)

Base part, and
A heat sink body having a plurality of fins provided on the base portion at intervals in a predetermined direction;
A heat sink plate having a plurality of slits into which each of the plurality of fins can be inserted, the plurality of fins being inserted into the plurality of slits and engaged with the heat sink body;
A heat sink characterized by having. In the heat sink according to claim 1,
The heat sink according to claim 1, wherein the heat sink plate is disposed at the center in a cross direction crossing the predetermined direction. The heat sink according to claim 1 or 2,
A heat sink characterized in that the heat sink plate is inserted into each of the plurality of fins, and a concave portion recessed toward the base portion side is provided. The heat sink according to any one of claims 1 to 3, wherein
The heat sink according to claim 1, wherein the heat sink plate is detachable from the heat sink body.

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