JP4998548B2 - Heat dissipation component - Google Patents

Description

  The present invention relates to a heat dissipating component that includes a plurality of heat dissipating fins arranged with a gap therebetween and radiates heat from the heat dissipating fins to the air flowing through the gaps of the heat dissipating fins.

As electronic devices have become more sophisticated in recent years, large-scale LSIs with high computing power have been installed inside electronic devices, and as the computing power has further improved, the amount of heat generation has increased. Higher heat dissipation performance is also required for heat dissipation components responsible for heat dissipation. This heat dissipating part is usually provided with a large number of heat dissipating fins arranged with a gap, and air is passed through the heat dissipating fins to transfer heat from the heat dissipating fins to the air. The heat dissipation structure is used to discharge the air to the outside of the equipment. Patent Documents 1 and 2 show structures in which the shape and arrangement of the radiating fins are devised in order to realize higher heat radiating performance.
JP-A-8-88301 JP-A-11-103183

  Here, one big problem with the heat dissipating component having a plurality of heat dissipating fins arranged as described above is that the air inflow of the heat dissipating fins while the electronic device equipped with the heat dissipating component is used for a long period of time. Dust adheres to the side edges, air flow becomes worse and heat dissipation performance deteriorates. As a result, for example, large-scale LSI and other heat-emitting components that are subject to heat dissipation become difficult to cool, resulting in high heat. This may cause malfunction or deterioration of the electronic device, which may cause damage to the heat-generating components and stop the operation of the electronic device.

  Here, in order to reduce the adhesion of dust to the radiating fins, it is conceivable to widen the gap between the radiating fins and reduce the air volume. Such countermeasures are not preferable in a situation where an increase in heat dissipation performance is required as the amount increases.

  In view of the above circumstances, an object of the present invention is to provide a heat dissipating component in which dust adhesion is reduced while maintaining heat dissipating performance.

  The heat dissipating part of the present invention that achieves the above object is a heat dissipating part that includes a plurality of heat dissipating fins arranged with a gap therebetween, and transfers heat from the heat dissipating fins to the air flowing through the gaps of the heat dissipating fins. The air inflow side edge of the fin has a notch shape in which different or circularly different portions are notched in the arrangement direction of the heat dissipating fins.

  Since the heat dissipating part of the present invention has the above-mentioned notch shape at the air inflow side edge of the heat dissipating fin, the air inflow opening at the air inflow side edge is substantially widened, and the adhesion of dust is reduced while maintaining the heat dissipating performance. Is done.

  Here, in the heat dissipating part of the present invention, it is preferable that the air inflow side edge of the heat dissipating fin has the notch shape, and further, the air outflow side edge of the heat dissipating fin has the notch shape.

  If the air outflow side edge of the radiating fin has the above-mentioned notch shape, the resistance of the air flowing through the gap between the radiating fins is reduced correspondingly, and the air flow is smoothed, which helps to improve the radiating performance.

  Further, in the heat dissipating component of the present invention, a gap is formed between the protruding portions of adjacent heat dissipating fins when the edge of the heat dissipating fin is viewed in the arrangement direction of the heat dissipating fins. It is preferable.

  In this case, the gap between the air inflow side edges of the adjacent radiating fins is further expanded equivalently, and the dust adhesion can be further reduced.

  Moreover, the heat radiating component of the present invention preferably includes a heat absorbing plate that absorbs heat from the heat generating component to be cooled, and the radiating fins are erected on the heat absorbing plate.

  Adopting this structure, the heat absorbing plate absorbs heat from the heat generating component and transmits it to the heat radiating fin, and heat is transferred from the heat radiating fin to the air, so that heat is radiated from the heat generating component.

  Here, it is preferable that the structure including the heat absorbing plate further includes a heat transfer member that contacts the heat absorbing plate and transmits heat of the heat absorbing plate to the heat radiating fin through the heat radiating fin.

  When this heat transfer member is provided, the heat of the heat absorption plate is more efficiently transmitted to the radiation fins.

  Furthermore, in the heat radiating component of the present invention, it is preferable to include a fan that forms an air flow in the gap between the heat radiating fins.

  By providing the fan integrally, there is no need to separately design a fan mounting structure or to prepare a fan separately, which is convenient.

  In that case, the fan may be a fan that sends air into the gap between the radiating fins, or the fan may be a fan that sends out air through the gap between the radiating fins.

  As described above, according to the present invention, the heat dissipation performance is maintained and the adhesion of dust is reduced.

It is a perspective view of the thermal radiation component as 1st Embodiment of this invention. FIG. 2 is a top view of the heat dissipation component shown in FIG. 1. It is a front view of the heat radiating component shown in FIG. It is a side view of the heat radiating component shown in FIG. FIG. 2 is an enlarged view of a portion of a circle R1 shown in FIG. FIG. 4 is an enlarged view of a portion of a circle R2 shown in FIG. It is a perspective view of the thermal radiation component as 2nd Embodiment of this invention. It is a side view of the thermal radiation component shown in FIG. FIG. 9 is an enlarged view of a portion of a circle R3 shown in FIG. It is a schematic perspective view of the heat sink plate which comprises the heat radiating component shown in FIG. It is a schematic diagram which shows the shape of the heat pipe which comprises the thermal radiation component shown in FIG.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is a perspective view of a heat dissipation component as a first embodiment of the present invention, FIG. 2 is a top view of the heat dissipation component shown in FIG. 1, FIG. 3 is a front view of the heat dissipation component shown in FIG. FIG. 2 is a side view of the heat dissipation component shown in FIG. 1.

  5 is an enlarged view of a portion of a circle R1 shown in FIG. 1, and FIG. 6 is an enlarged view of a portion of a circle R2 shown in FIG.

  The heat radiating component 10 includes a heat absorbing plate 11 and a plurality of heat radiating fins 12 arranged with a gap therebetween. The heat absorbing plate 11 is made of a metal having high heat transfer efficiency, for example, copper, and its lower surface is applied to a heat generating component (not shown) to absorb heat from the heat generating component. The heat radiating fins 12 are caulked to hold the large number of heat radiating fins 12 and to transfer heat to the heat radiating fins 12. The heat radiating fins 12 are made of a material having high heat transfer efficiency, such as aluminum and copper. The heat transmitted from the heat generating component to the heat absorbing plate 11 is further transmitted to the heat radiating fins and is transmitted to the air flowing through the gaps of the heat radiating fins 12. The air that has been heated to a high temperature is discharged to the outside of an electronic device or the like in which the heat generating component or the heat dissipation component 10 is built.

  Here, the notch shape which expands and shows in FIG. 5 is formed in the upper end edge of the many radiation fin 12 which comprises this thermal radiation component 10, and the side edge of both sides. That is, each of the radiating fins has a shape in which the edge is notched so as to repeat the unevenness, and in the example shown here, the protrusions 12a and 12b are overlapped by adjacent radiating fins. In addition, as shown in FIG. 6, the convex portions are alternately formed at different positions so that gaps g and h are formed between the convex portions 12a and 12b.

  For this reason, the substantial opening of the air inflow end edge to the gap of the radiating fin 12 and the air outflow edge from the gap of the radiating fin 12 (the distance d between the radiating fins shown in FIG. The gap e) between the fin protrusions is formed wide, dust adhesion to the air inflow edge is reduced, and the resistance of the air flow through the gap of the heat radiating fin is reduced, so that the air flow flows more smoothly. Therefore, this point is also useful for preventing the adhesion of dust and further improving the heat dissipation performance.

  In the example shown here, when viewed in the arrangement direction of the heat radiating fins, the opening gaps g, h between the convex portions are formed as shown in FIG. , H, for example, even if the convex portions are alternately formed so that a part of the convex portions overlap each other, the substantial opening of the air inflow end edge and the air outflow end edge of the radiating fin is not reduced. Since the spread is ensured, the gaps g and h are not necessarily formed.

  Further, in the example shown here, the heat dissipating fin has a cutout shape in three directions except for the edge that is caulked to the heat absorbing plate 11 without distinguishing between the air inflow end edge and the air outflow end edge. When the air inflow edge and the air outflow edge are known in advance, only the air inflow edge may have the above-described notch shape. Since dust adheres to the air inflow end edge, if the air inflow end edge has the above-mentioned notch shape, the adhesion of dust can be reduced.

  Furthermore, in the example shown here, different portions are alternately cut out between adjacent radiating fins. However, for example, 3 notches are formed at the same position every three or four radiating fins. Notches may be formed at cyclically different positions so as to make a round with four or four sheets.

  7 is a perspective view of a heat dissipation component as a second embodiment of the present invention, and FIG. 8 is a side view of the heat dissipation component shown in FIG.

  FIG. 9 is an enlarged view of a portion of a circle R3 shown in FIG.

  10 is a schematic perspective view of a heat absorbing plate constituting the heat radiating component shown in FIG. 7, and FIG. 11 is a schematic diagram showing the shape of the heat pipe constituting the heat radiating component shown in FIG.

  The heat radiating component 20 as the second embodiment is provided with a heat absorbing plate 21 at its lower end.

  As shown in FIG. 10, the heat absorbing plate 21 includes a heat absorbing portion 211 that absorbs heat from a heat generating component (not shown) and four arm portions 212 for fixing the heat radiating component 20 shown in FIG. Has been.

  In this embodiment, the endothermic part 211 is made of copper in order to ensure good endothermic properties, and aluminum arm parts 212 are caulked and connected to the four corners thereof. Two long grooves 211a are formed in the heat absorbing portion 211, and a heat pipe 25 (see FIG. 11) described later is disposed in the two long grooves 211a. Further, the four arm portions 212 are provided with mounting holes 212a penetrating vertically. As shown in FIG. 7, screw parts 22 pass through the mounting holes 212 a, and by using these screw parts 22, the heat transfer part 20 attaches the lower surface of the heat absorbing part 211 to the upper surface of the heat generating part. In the pressed state, it is fixed to the casing of the electronic device. The spring member 23 is a device for allowing the heat transfer component 20 to be stably attached to a housing or the like in a state where the lower surface of the heat absorbing portion 211 is applied to the heat generating component.

  Further, in the heat dissipating component 20 shown in FIGS. 7 and 8, a large number of heat dissipating fins 24 that are caulked and fixed to the heat absorbing portion 211 are arranged. The upper surface and both side surfaces of these radiating fins 24 covered by the fan 26 have a notch shape as shown in FIG. This notch shape itself is the same as the notch shape of the heat radiating fins 12 constituting the heat radiating component 10 of the first embodiment described above, and redundant description here is omitted.

  The heat radiating component 20 is provided with a heat pipe 25 having a shape as shown in FIG. One end side of the heat pipe 25 is fitted into a long groove 211a formed in the heat absorbing portion 211 of the heat absorbing plate 21, extends from there, folds in a curved shape, extends in the arrangement direction of the heat radiating fins 24, and dissipates heat from a large number of plates. The fin 24 is penetrated.

  Due to the presence of the heat pipe 25, the heat absorbed by the heat absorbing portion 211 from the heat generating component is efficiently transmitted to the heat radiating fins 24 through the heat pipe 25.

  Further, the heat dissipating component 20 shown in FIGS. 7 and 8 is provided with a fan 26 at a position covering the upper end edge of the heat dissipating fin 24. The fan 26 blows air from the upper edge of the radiating fin 24 toward the radiating fin 24, and the air sent from the upper edge of the radiating fin 24 to the gap between the radiating fins 24 by the fan 26 is the gap between the radiating fins 24. The heat is absorbed from the heat radiating fins 24 while passing through the heat sink, and further, the heat is absorbed directly from the heat absorbing plate 21 by hitting the heat absorbing plate 21 and exhausted from both side edges of the heat radiating fins 24.

  The upper end edge of the radiating fin 24 also has a notch shape similar to the notch shape formed on the side edge of the radiating fin 24, and therefore, the upper end edge of the radiating fin 24 extends to the air inflow side edge. Dust adhesion is reduced.

  In addition, although the fan 26 of this 2nd Embodiment demonstrated that it was a fan which blows toward the radiation fin 24, this fan 26 may be a fan which ventilates in the direction which sucks out air from the radiation fin 24. . In this case, both side edges of the radiating fin 24 become air inflow edges, but the radiating fin 24 also has a notch shape on both side edges, and therefore in this case as well, at the air inflow edge. It is possible to reduce the adhesion of dust to both side edges.

Claims (8)

In a heat dissipating part comprising a plurality of heat dissipating fins arranged with a gap between them, and transferring heat from the heat dissipating fins to the air flowing through the gaps of the heat dissipating fins,
An air inflow side edge of the radiating fin has a notch shape in which different or cyclically different portions are cut out in the arrangement direction of the radiating fin.   2. The heat radiating component according to claim 1, wherein, in addition to the air inflow side edge of the heat radiating fin having the notch shape, the air outflow side edge of the heat radiating fin further has the notch shape.   The clearance gap is formed between the protruding portions of adjacent radiating fins when the edge having the cutout shape of the radiating fin is viewed in the arrangement direction of the radiating fins. 1. A heat dissipating component according to 1.   The heat radiating component according to claim 1, further comprising a heat absorbing plate that absorbs heat from a heat generating component to be cooled, wherein the heat radiating fins are erected on the heat absorbing plate.   The heat radiating component according to claim 4, further comprising a heat transfer member that is in contact with the heat absorbing plate and penetrates the heat radiating fin to transmit heat of the heat absorbing plate to the heat radiating fin.   The heat radiating component according to claim 1, further comprising a fan that forms an air flow in the gap between the heat radiating fins.   The heat radiating component according to claim 6, wherein the fan is a fan that sends air into a gap between the heat radiating fins.   The heat dissipating component according to claim 6, wherein the fan is a fan that sends out air from a gap between the heat dissipating fins.

Images