JPH0396258A - Heat-pipe type cooler - Google Patents

Abstract

PURPOSE:To improve cooling performance and to obtain a compact and light cooler by constituting the cooler with a base plate on the outside of which an element mounting surface is provided and on the inside of which a heat-pipe attaching part is provided, a heat pipe, a plurality of fins which are attached to the condensing part of the heat pipe, and a forced air cooling fan. CONSTITUTION:An element mounting surface is provided at the outside of a base plate 1, and a heat pipe attaching part is provided at the inside of the base plate 1. The evaporating part of a heat pipe 2 is attached to the heat-pipe attaching part of the base plate 1. The condensing part of the heat pipe 2 is bent and raised. A plurality of fins 3 are attached to the condensing part of the heat pipe 2. A forced air cooling fan 4 is provided at the side surface of the base plate 1 which is intersected with the fins 3 at a right angle. Thus the cooler is constituted. For example, the base plate is manufactured by using heat conducting material such as copper and aluminum by an extrusion method, a die casting method or the like. The flat-element mounting surface is formed at the outside. An attaching recess part is formed at the inside. One or plurality of heat generating elements 6 such as a thyristors and power transistors are mounted on the element mounting surface of the base plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat pipe type cooler that uses a heat pipe to diffuse heat generated from a semiconductor element or the like and cools it with forced air.

[Conventional technology]

Semiconductor devices that generate a medium amount of heat, such as silices and power transistors, are often cooled by forced air cooling using fans.

FIG. 12 is a perspective view showing an example of a conventional forced air cooler.

The cooling block 7 is made of a thermally conductive material such as copper or aluminum, and has a base portion 7a formed by extrusion or casting.
It is manufactured in such a shape as to have a fin portion 7b. The heating element 6 was mounted in close contact with the front surface of the base portion 7a of the cooling block 7, and the fan 4 forcedly air-cooled the fin portion 7b.

[Problem to be solved by the invention]

However, the conventional cooler described above has a problem in that as the amount of heat dissipated by the heating element increases, the weight of the cooling block 7 becomes heavier and the shape becomes larger.

Further, if the pitch of the fin portions 7b of the cooling block 7 cannot be narrowed to a certain interval or less, and the capacity is constant, there is a problem that the heat dissipation area is limited and the cooling capacity is reduced.

On the other hand, in the case of electronic equipment, etc., which are placed together with other elements in a limited internal space, the basic shape of the cooler can be left as is, improving cooling performance and reducing the occupied volume. We must realize weight reduction.

An object of the present invention is to solve the above-mentioned problems and provide a small and lightweight heat pipe cooler with improved cooling performance.

[Means to solve the problem]

In order to solve the above problems, the heat pipe type cooler according to the present invention includes a base plate having an element mounting surface on the outside and a heat pipe attachment part on the inside, and an evaporator on the temporary heat pipe attachment part of the base. a plurality of fins attached to the condensing section of the heat pipe, and forced air cooling provided on a side surface of the base plate perpendicular to the fins; It consists of a fan for use. [Function] According to the above structure, heat from the heating element mounted on the base plate can be efficiently transmitted to the fins at the end using the heat pipe, and can be forcedly cooled by the fan.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings etc., this invention will be described in detail about an Example.

1 to 7 are views showing an embodiment of a heat pipe type cooler according to the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a rear view, and FIG. 4 is a side view, FIG. 5 is a front view, FIG. 6 is a perspective view showing a heat pipe attachment portion, and FIG. 7 is a perspective view showing a fin attachment portion.

The base is made of a thermally conductive material such as copper or anoleminium by an extrusion method or a guicasting method, and has a flat element mounting surface 1a on the outside.
is formed, and a mounting recess lb is formed inside.

On the element mounting surface la of the Heath temporary 1, l or a plurality of heat generating elements 6 such as cyrisks and power transistors are mounted.

The heat pipe 2 has a circular and rectangular cross section. It is an irregularly shaped copper container with a groove formed on its inner surface and a mesh-like liquid inserted into it, and purified water or the like as a working fluid is sealed inside.

This heat pipe 2 is bent into a U shape,
The base 2a, which becomes the evaporator, is inserted into the mounting recess 1b of the base plate 1, covered from above with the fixing plate 1c, and fixed tightly by screwing (FIG. 6). Since the heat pipe 2 is attached to the mounting recess 1b of the base plate 1, a sufficient contact area can be obtained, and by applying thermally conductive grease or the like between the base 2a, the mounting recess lb, and the fixing plate 1c, Heat from the heating element 6 mounted on the outer element mounting surface 1a can be efficiently transferred to the inner heat vip 2.

The fins 3 are attached to the arm portion 2b, which serves as the condensing portion, of the heat vip 2 by press-fitting or brazing.
Figure 7). This fin 3 is made of metal such as copper or aluminum. It is processed into a thin plate shape of about 1 to 0.5 mm, and the required number of plates are attached at a relatively small pitch of about 1 to 5 mm.

The fan 4 is for forced air cooling, and an axial fan or the like is used.
attached to either side perpendicular to the

The casing 5 is designed to cover all the remaining openings except for the inlet N and the outlet OUT for the cooling air generated by the fan 4, and is made of, for example, a piece of iron with a U-shaped cross section. A metal plate made of aluminum or the like or a resin plate made of plastic or the like can be used.

In addition, the casing 5 arranged parallel to the base plate 1 is
The outermost one of the fins 3 can be used for both purposes.

FIGS. 8 and 9 are perspective views showing modified examples of the heat-vib type cooler according to the present invention.

As shown in FIG. 8, the heat pipe 2A can be bent into an L-shape, and the base 2c side, which is the evaporation part, can be joined to the mounting recess 1d of the heel plate 1A with a brazing material 1e.

A seventh
Just attach the fins 3 as shown in the figure.

As shown in Figure 9, two wooden heat vips 2B and 2C are connected to one
Base Fi. It may also be attached to IB.

Note that the U-shaped heat pipe 2 may be brazed, or the L-shaped heat pipe 2A may be fixed with a fixing plate IC. The two heat pipes 2B and 2C may also be L-shaped, and the mounting method may be either the method shown in FIG. 6 or FIG. 8. FIGS. 10 and 11 are perspective views for explaining the air blowing direction of the embodiment of the heat pipe type cooler according to the present invention.

The air blowing direction can be changed depending on the mounting position of the fan 4, casing 5, etc.

For example, as shown in FIG. 10, if all the side surfaces perpendicular to both sides of the fan 4 are covered with the casing 5, the cooling air can be exhausted linearly from the surface facing the fan 4. Furthermore, as shown in FIG. 11, if the opposing surfaces of the fan 4 are covered with the casing 5, one of the sides perpendicular to the fan 4 is left open, and the other side is covered with the casing 5. The cooling air can be bent at right angles and exhausted.

Since the air blowing direction can be selected in this way, when the heat pipe type cooler according to the present invention is incorporated into electronic equipment, etc.
Easy to install even when the inflow and outflow directions of cooling air are limited. [Effects of the Invention] As explained in detail above, according to the present invention, the heat from the heating element mounted on the base plate can be diffused and transmitted to the terminal fin using a heat pipe, so that the fin efficiency can be improved. Improved, the volume occupied by the fins can be significantly reduced compared to conventional coolers.

Further, since the fins can be made extremely thin and the pinch to which the fins are attached can be made narrower, the weight can be significantly reduced for the same volume, together with the reduction in the volume occupied.

Therefore, both the occupied volume and weight can be significantly reduced for the same cooling capacity.

Furthermore, since the flow direction of the cooling air can be diversified, the degree of freedom in the mounting location is increased.

[Brief explanation of drawings]

1 to 7 are views showing an embodiment of a heat pipe type cooler according to the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a rear view, and FIG. 4 is a side view, FIG. 5 is a front view, FIG. 6 is a perspective view showing the heat pipe attachment part, and FIG. 7 is a perspective view showing the fin attachment part. FIGS. 8 and 9 are perspective views showing modified examples of the heat pipe type cooler according to the present invention. Figure 10. FIG. 11 is a diagram for explaining the air blowing direction of the embodiment of the heat pipe type cooler according to the present invention. FIG. 12 is a perspective view showing an example of a conventional forced air cooler. l...Base plate 2...Heat pipe 3...Fin 4...Fan 5...Casing 6...Heating element

Claims (1)

[Claims] A base plate having an element mounting surface on the outside and a heat pipe attachment part on the inside, a heat pipe in which an evaporation part is attached to the heat pipe attachment part of the base plate and a condensation part is bent, and the heat pipe. A heat pipe type cooler comprising a plurality of fins attached to a condensing part of the base plate, and a fan for forced air cooling provided on a side surface of the base plate perpendicular to the fins.