JP2005327795A - Heat radiator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat radiator which can radiate heat efficiently, when making a cooling medium flow forcibly. <P>SOLUTION: The heat radiator 1 consists of a lot of columnar heat-radiating elements 11 which are installed in a projecting state on a plate-like body 10 of the heat radiator having a wide surface along the XY plane. Each of the heat radiating elements 11 has a cross-section such that two sides form an acute-angle portion, and the acute-angle portion is oriented in the +X direction, which is the upstream side of the cooling medium flowing direction. The growing direction of each heat-radiating element 11 is inclined toward the -X direction, which is the direction corresponding to the cooling medium flow. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radiator for radiating heat from an electronic circuit or the like.

  In an apparatus composed of a circuit using a semiconductor or the like, a heat sink as a heat radiating component is frequently used in order to suppress an adverse effect due to heat generated from the circuit.

  In order to efficiently dissipate heat by increasing the surface area (that is, the heat radiation area) of this heat sink, in many cases, a large number of thin columnar members (pins) such as cylinders and quadrangular columns stand perpendicular to the plane plate. It has an installed structure.

  And in order to obtain the heat dissipation effect substantially equal regardless of the direction in which the refrigerant (gas or fluid) flows, the pins erected on the heat sink are configured such that the cross section thereof becomes a circle, a square, or the like.

  However, when the refrigerant is forced to flow by various fans or the like, the pin becomes a resistance to the flow of the refrigerant. The greater the output of the fan motor or the like, the greater the degree of forced refrigerant flow, and the greater the degree of heat release by the heat sink (for example, the amount of heat released per unit time). That is, the degree of heat dissipation by the heat sink and the output of the fan motor and the like have a trade-off relationship.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a radiator that can efficiently dissipate heat when the refrigerant is forced to flow.

  In order to solve the above problems, the invention of claim 1 is a radiator used in an environment in which a refrigerant is forced to flow in a predetermined flow direction, with respect to the radiator body and the radiator body. And the heat sink has a cross section in which an acute angle portion is formed by two sides and the acute angle portion is oriented in a predetermined direction corresponding to the upstream side of the flow direction. To do.

  The invention of claim 2 is a radiator used in an environment in which the refrigerant is forced to flow in a predetermined flow direction, the radiator main body, and a rod-shaped protrusion protruding from the radiator main body. A heat radiator, wherein the heat radiator has a cross section whose length along a first direction corresponding to the flow direction is longer than a length perpendicular to the first direction.

  Moreover, invention of Claim 3 is a heat radiator of Claim 1 or Claim 2, Comprising: The said heat radiator followed the 2nd direction orthogonal to the 1st direction corresponded to the said flow direction. The cross-section has a minimum width on the side corresponding to the upstream side in the flow direction.

  Moreover, invention of Claim 4 is a heat radiator in any one of Claims 1-3, Comprising: The said heat radiator is 1st in which the extending direction of the said heat sink corresponds to the said flow direction. It protrudes with respect to the said heat radiator main body so that it may become inclined toward a direction, It is characterized by the above-mentioned.

  Further, the invention of claim 5 is a radiator used in an environment in which the refrigerant is forced to flow in a predetermined flow direction, the radiator body, and a radiator projecting from the radiator body. The radiator is projected with respect to the radiator body such that the extending direction of the radiator is inclined toward a first direction corresponding to the flow direction. Features.

  The invention according to claim 6 is the radiator according to any one of claims 1 to 5, wherein the radiator has a concave portion on a side corresponding to the downstream side in the flow direction. And

  The invention according to claim 7 is the radiator according to any one of claims 1 to 6, wherein a large number of the radiators are provided so as to protrude from the radiator body. .

  According to the first aspect of the present invention, the heat sink has an acute angle portion formed by two sides, and the acute angle portion has a cross section that points in a direction corresponding to the upstream side of the flow direction of the refrigerant. Since the resistance of the heat radiating body to the heat sink can be reduced and the refrigerant sent to the radiator flows smoothly, heat can be efficiently radiated when the refrigerant is forced to flow.

  According to the invention of claim 2, the radiator has a cross section in which the length along the flow direction of the refrigerant is longer than the length along the direction perpendicular to the flow direction of the refrigerant. Since the resistance of the radiator to the flow can be reduced and the refrigerant sent to the radiator flows smoothly, heat can be efficiently radiated when the refrigerant is forced to flow.

  According to the third aspect of the present invention, the flow of the refrigerant is achieved by having a cross section in which the width orthogonal to the direction corresponding to the flow direction of the refrigerant is minimized on the side corresponding to the upstream side in the flow direction of the refrigerant. Since the resistance of the heat radiating body to the heat sink can be reduced and the refrigerant sent to the radiator flows smoothly, heat can be efficiently radiated when the refrigerant is forced to flow.

  In addition, according to the invention described in claim 4 or claim 5, the heat dissipating body is provided so that the extending direction of the heat dissipating member is inclined toward the direction corresponding to the refrigerant flow direction. Since the resistance of the radiator to the refrigerant flow can be reduced and the refrigerant sent to the radiator flows smoothly, heat can be efficiently radiated when the refrigerant is forced to flow.

  Further, according to the invention described in claim 6, the radiator has the concave portion on the side corresponding to the downstream side in the flow direction of the refrigerant, thereby contributing to the weight reduction of the radiator.

  In addition, according to the invention described in claim 7, a large number of heat dissipating members according to the invention described in any one of claims 1 to 6 are provided so as to protrude from the heat dissipating body. Since the refrigerant hardly stays in the gaps between the bodies and the refrigerant sent to the radiator flows smoothly, heat can be efficiently radiated when the refrigerant is forced to flow.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an outline of a radiator 1 and peripheral configuration according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an external configuration of the radiator 1. In FIG. 1 and the drawings after FIG. 1, three orthogonal axes of X, Y, and Z are attached in order to clarify the azimuth relationship, and the flow direction of refrigerant (gas, liquid, etc.) (if necessary) ( Hereinafter, the direction of refrigerant flow is also indicated by solid arrows.

  As shown in FIGS. 1 and 2, the radiator 1 is entirely made of a material having excellent thermal conductivity such as an aluminum-based metal, and the lower surface (surface in the −Z direction) is formed substantially flat. It is formed as a surface (hereinafter also referred to as “circuit installation surface”) 15 for installing the circuit 2 such as a circuit. The radiator 1 includes a plate-like radiator body 10 having a wide surface along the XY plane, and a large number of columnar (rod-like) radiators (“pins”) protruding from the radiator body 10. (Also referred to as 11).

  As shown in FIG. 1, the radiator 1 is formed on the assumption that a refrigerant composed of a gas such as air is forced to flow from the X direction to the radiator 1 by the cooling fan 3 or the like. Has been. That is, the radiator 1 is configured as a radiator that is used in an environment in which the refrigerant is forced to flow along a predetermined refrigerant flow direction by the driving force of the cooling fan 3 or the like.

  Each radiator 11 has a triangular prism shape whose cross section along the XY plane is an isosceles triangle, and the extending direction is inclined toward the −X direction corresponding to the refrigerant flow direction. That is, a large number of columnar heat dissipating bodies 11 are provided so as to protrude from the heat dissipating body 10 in a state in which each tip end portion is inclined in a direction in which each tip end part is tilted in the −X direction. As described above, the structure in which the radiator 11 is inclined with respect to the refrigerant flow direction and the radiator 11 protrudes can reduce the resistance of the radiator 11 to the refrigerant flow flowing from the + X direction toward the radiator 1. it can.

  For example, the large number of radiators 11 have the same shape, and the shape of the cross section along the XY plane of each radiator 11 is constant regardless of the position in the Z-axis direction. Hereinafter, description will be made on the assumption that a large number of radiators 11 have the shapes described above.

  FIG. 3 is a view showing a cross section 11CS of the heat dissipating body 11 according to the XY plane along the refrigerant flow direction. The cross section 11CS has, for example, an isosceles triangle shape formed by three sides La, Lb, and Lc, the lengths of the two sides La and Lb are equal, and an acute angle is formed by the two sides La and Lb. An acute angle portion (hereinafter, also referred to as “acute angle portion”) Ed formed by the two sides La and Lb is configured to point in the X direction corresponding to the upstream side of the refrigerant. In other words, the radiator 11 is configured such that two surfaces forming an acute angle are exposed to the upstream side in the refrigerant flow direction.

  From another point of view, the width along the Y direction orthogonal to the −X direction corresponding to the refrigerant flow direction gradually decreases from the −X direction to the + X direction, and corresponds to the upstream side of the refrigerant flow direction. The cross section 11CS is configured so as to be the smallest on the side to be operated (the end located in the + X direction most). In other words, the width along the −X direction corresponding to the refrigerant flow direction and the direction orthogonal to the extending direction (here, the axial direction) of the radiator 11 is the smallest on the side corresponding to the upstream side of the refrigerant flow direction. The heat dissipating body 11 is configured as described above.

  Further, regarding the shape in the cross section perpendicular to the extending direction of the radiator 11, the acute angle portion formed by the two sides comes to the side corresponding to the upstream side in the refrigerant flow direction. The width orthogonal to the installation direction is the smallest on the side corresponding to the upstream side in the refrigerant flow direction. And here, among the resistance of the surface of the radiator 11 with respect to the flow of the refrigerant when the refrigerant flows from all directions on the XY plane, the surface of the radiator 11 with respect to the flow of the refrigerant when the refrigerant flows from the + X direction The shape of the heat radiator 11 is set so that the resistance of the heat sink 11 is minimized.

  Since the radiator 11 has such a shape, as shown in FIG. 3, the refrigerant flowing from the + X direction (solid arrow AR <b> 1) smoothly flows without receiving a large resistance on the surface of the radiator 11. (Dashed arrow AR2).

  As described above, in the radiator 1 according to the present embodiment, the radiator 11 forms an acute angle portion by the two sides La and Lb, and the acute angle portion is oriented in the + X direction corresponding to the upstream side of the refrigerant flow direction. It has a cross section 11CS. Further, the width along the + Y direction of the cross section 11CS of the heat dissipating body 11 gradually decreases toward the upstream side in the refrigerant flow direction, and is minimized at the end. As a result, the resistance of the radiator 11 with respect to the flow of the refrigerant can be reduced, so that the refrigerant sent to the radiator 1 is less likely to stay in the gaps between the numerous radiators 11, and smoothly the radiator 1 It is possible to quickly pass through the gap between the radiators 11.

  In addition, a large number of radiators 11 are protruded from the radiator body 10 in a state where the extending direction is inclined in the refrigerant flow direction. As a result, the resistance of the radiator 11 to the refrigerant flow can be reduced, so that the refrigerant flowing from the + X direction toward the radiator 1 is less likely to stay in the gaps between the numerous radiators 11, and smoothly radiates heat. It flows through the gaps between the bodies 11.

  Thus, if smooth refrigerant flow is realized, the capability of the device for forcibly flowing the refrigerant such as the cooling fan 3 (hereinafter also referred to as “forced flow device”) (drive for flowing the refrigerant) Even if the force) is the same, the flow rate of the refrigerant flowing through the gap between the radiators 11 can be increased, and as a result, the cooling capacity can be increased.

  Moreover, even if the capability of the forced flow device (driving force for flowing the refrigerant) is low, the same cooling effect as when using a conventional radiator can be obtained, so consumption for forcing the refrigerant to flow Energy can also be reduced. Moreover, since the same cooling effect as the case where the conventional heat radiator is used can be obtained even if the capability itself of the forced flow device is reduced, it is possible to contribute to reducing the size and weight of the forced flow device.

  Therefore, the heat generated from the circuit 2 installed with respect to the radiator 1 can be efficiently radiated in view of the cooling capacity and the energy.

<Modification>
As mentioned above, although embodiment of this invention was described, this invention is not limited to the thing of the content demonstrated above.

  For example, in the above-described embodiment, the cross-section 11CS along the XY plane of the radiator 11 is configured to be an isosceles triangle. However, the present invention is not limited to this, for example, the XY plane of the radiator 11 As shown in FIG. 4, the cross section along the surface may have an elliptical shape in which the + X direction corresponding to the refrigerant flow direction is the major axis direction. As described above, the radiator 11 has a cross section in which the length Lx along the + X direction corresponding to the refrigerant flow direction is longer than the length Ly along the + Y direction, so that the radiator 11 with respect to the refrigerant flow. Resistance can be reduced. That is, the heat generated from the circuit 2 installed for the radiator 1 can be efficiently radiated.

  Even when the cross section 11CS of the radiator 11 has a shape as shown in FIG. 4, the cross section 11CS is in the Y direction orthogonal to the −X direction corresponding to the refrigerant flow direction, as in the above-described embodiment. The width along the line is minimum on the side corresponding to the upstream side in the refrigerant flow direction.

  In the above-described embodiment, the heat dissipating body 11 is formed by a triangular prism whose extending direction is inclined. However, the present invention is not limited to this. For example, the heat dissipating body 11 corresponds to the downstream side in the refrigerant flow direction. You may make it have the shape dented to the side, ie, a recessed part. For example, when the recess 11b is added to the heat dissipating body 11 having the cross section 11CS as shown in FIG. 3, the cross-sectional shape along the XY plane of the heat dissipating body 11 is as shown in FIG. Moreover, when the recessed part 11c is added to the heat radiator 11 which has the cross section 11CS as shown in FIG. 4, the cross-sectional shape along XY plane of the heat radiator 11 will become as shown in FIG. That is, the cross section 11CS along the XY plane of the radiator 11 may have a recessed portion on the side corresponding to the downstream side in the refrigerant flow direction (the −X direction side). Even with such a configuration, it is possible to reduce the resistance of the radiator 11 with respect to the flow of the refrigerant as in the above-described embodiment, and further contribute to the weight reduction of the radiator 1 by reducing the volume of the radiator 11. be able to. As a result, it is possible to contribute to improvement in heat dissipation efficiency and weight reduction of various devices to which the radiator 1 is attached.

  In the above-described embodiment, the large number of radiators 11 have the same shape. However, the present invention is not limited to this, and for example, the lengths in the extending direction may be different from each other.

  In the above-described embodiment, the refrigerant is composed of a gas such as air, but is not limited thereto, and may be composed of, for example, various gases other than air or various liquids.

  Note that the two sides forming the acute angle portion include not only a straight line segment but also those formed with a slight curvature (curved ones).

  In the embodiment described above, as shown in FIGS. 3 to 6, the shape of the cross section 11CS of the radiator 11 is the target in the ± Y direction, that is, the vertical object in FIGS. However, the present invention is not limited to this, and the same effects as those of the above-described embodiment can be obtained even if the object is not targeted in the ± Y directions. That is, for example, the cross-section 11CS shown in FIGS. 3, 5, and 6 is made non-objective in the ± Y direction (vertical asymmetry in FIGS. 7 to 9) as shown in FIGS. May be. Specifically, as shown in FIG. 7, for example, even if the lengths of the two sides La and Lb of the cross section 11CS are different and an acute angle is formed by the two sides La and Lb, the same effect as in the above-described embodiment can be obtained. be able to. That is, the shape of the cross section 11CS in FIG. 3 is not limited to an isosceles triangle.

It is a figure which shows the outline | summary of the heat radiator and peripheral structure which concern on embodiment of this invention. It is a perspective view which shows the external appearance structure of the heat radiator which concerns on embodiment of this invention. It is a cross-sectional schematic diagram of a heat radiator. It is a cross-sectional schematic diagram of the heat radiator which concerns on a modification. It is a cross-sectional schematic diagram of the heat radiator which concerns on a modification. It is a cross-sectional schematic diagram of the heat radiator which concerns on a modification. It is a cross-sectional schematic diagram of the heat radiator which concerns on a modification. It is a cross-sectional schematic diagram of the heat radiator which concerns on a modification. It is a cross-sectional schematic diagram of the heat radiator which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radiator 2 Circuit 3 Cooling fan 10 Radiator body 11 Radiator 11b, 11c Recess 11CS Cross section Ed Sharp angle part

Claims (7)

A radiator that is used in an environment in which a refrigerant is forced to flow in a predetermined flow direction,
A radiator body,
A radiator that protrudes from the radiator body;
With
The radiator has a cross section in which an acute angle portion is formed by two sides and the acute angle portion is oriented in a predetermined direction corresponding to an upstream side of the flow direction. A radiator that is used in an environment in which a refrigerant is forced to flow in a predetermined flow direction,
A radiator body,
A rod-shaped radiator that protrudes from the radiator body;
With
The heat radiator has a cross section in which a length along a first direction corresponding to the flow direction is longer than a length orthogonal to the first direction. The heat radiator according to claim 1 or claim 2,
The heat dissipating body has a cross section in which a width along a second direction orthogonal to the first direction corresponding to the flow direction is minimized on a side corresponding to the upstream side of the flow direction. vessel. A radiator according to any one of claims 1 to 3,
The heat radiating member is provided so as to protrude from the radiator body so that the extending direction of the heat radiating member is inclined toward a first direction corresponding to the flow direction. vessel. A radiator that is used in an environment in which a refrigerant is forced to flow in a predetermined flow direction,
A radiator body,
A radiator that protrudes from the radiator body;
With
The heat radiating member is provided so as to protrude from the radiator body so that the extending direction of the heat radiating member is inclined toward a first direction corresponding to the flow direction. vessel. A radiator according to any one of claims 1 to 5,
The radiator has a recess on a side corresponding to the downstream side in the flow direction. A radiator according to any one of claims 1 to 6,
The radiator is characterized in that a large number of the radiators are provided with respect to the radiator body.

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