JPH0396259A - Heat-pipe type cooler - Google Patents

Abstract

PURPOSE:To obtain a compact and light cooler wherein the cooling performance is improved and the number of mounted heating elements is increased by constituting the cooler with two base plates on the outsides of which an element mounting surface is provided, on the insides of which a heat-pipe attaching part is provided, and which are arranged at a right angle or in parallel, heat pipes, a plurality of fins, and forced air cooling fan. CONSTITUTION:An element mounting surface 1a is provided at the outside of each of two base plates 1 and 1A. A heat-pipe attaching part 1b is provided at the inside of each of the base plates 1 and 1A. The first and second base plate 1 and 1A are arranged at a right angle or in parallel. Evaporating parts are attached to the heat-pipe attaching parts 1b of the first and second base plates 1 and 1A. The condensing parts of one or more heat pipes 2 and 2A are bent and raised. A plurality of fins 3 are attached to the condensing parts of the heat pipes 2 and 2A. A forced air cooling fan 4 is provided at the side surfaces of the base plates 1 and 1A which are intersected with the fins 3 at right angles. The cooler is constituted in this way. For example, the base plates 1 and 1A are manufactured by using a material such as copper, aluminum or the like by an extrusion method, a die casting method or the like. The element mounting surface 1a is formed at the outside, and the attaching recess part 1b is formed at the inside.

Description

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

[Prior Art] Semiconductor elements with medium heat generation capacity, such as silicon chips and power transistors, are often cooled by forced air cooling using a fan.

FIG. 16 is a perspective view showing an example of a conventional forced air cooler.

The cooling block 7 has a base portion 7a made of a thermally conductive material such as copper or aluminum by extrusion molding or casting.
It is manufactured in a shape having a fin portion 7b and 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.

Furthermore, the number of heating elements that can be mounted on the base portion 7a of the cooling block 7 is limited in terms of performance and area.

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 provide a small and lightweight heat pipe type cooler that solves the above-mentioned problems, improves cooling performance, and increases the number of heat generating elements mounted.

[Means to solve the problem]

In order to solve the above problems, the heat pipe type cooler according to the present invention has first and second paces arranged at right angles or in parallel, each having an element mounting surface on the outside and a heat pipe mounting part on the inside. a plate, and the first and second
one or more heat pipes in which an evaporating part is attached to a heat pipe attachment part of a base plate and a condensing part is bent;
It is surrounded by a plurality of fins attached to the condensing part of the heat pipe and a fan for forced air cooling provided on a side surface of the base plate perpendicular to the fins.

[Effect]

According to the above structure, heat from the heat generating elements 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 6 are diagrams showing a first embodiment of a heat pipe type cooler according to the present invention, in which FIG. 1 is a perspective view;
Figure 2 is a plan view, Figure 3 is a front view, Figure 4 is a side view, Figure 5 is a perspective view showing the heat pipe attachment part, and Figure 6 is a perspective view showing the fin attachment part. be.

The bases Fi1 and IA are made of a thermally conductive material such as copper or aluminum by an extrusion method or a die-casting method, and in this embodiment are integrally formed with an L-shaped cross section. This base Fil. In lA,
Each has a flat element mounting surface 1a on the outside,
A mounting recess lb is formed on the inside. Heath board 1,1
On the element mounting surface 1a of A, one or more heat generating elements 6 such as a cyrisk or a power transistor are mounted.

The heat vibes 2 and 2A are made of a copper container with a circular or rectangular cross section with grooves formed on the inner surface or a wick such as a mesh inserted, and pure water or the like as a working fluid is sealed inside. It is something that This heat pipe 2.2
The human body is bent into a U-shape, and the base part 2a, which becomes the evaporation part, is inserted into the mounting recess 1b of the base plate 1 and IA, and the fixed viIC is covered from above and secured with a screw, so that it is tightly attached. It is fixed (Fig. 5). Since the heat pipes 2, 2A are attached to the mounting recesses 1b of the heat pipes 1, LA, a sufficient contact area can be obtained, and
By applying thermally conductive grease or the like between the base 2a, the mounting recess 1b, and the fixing plate 1c, heat from the heating element 6.6A mounted on the outer element mounting surface 1a is transferred to the inner heat vibrator 2, 2A can be efficiently transmitted.

The fin 3 is attached to the arm portion 2b, which is the 4k compressed portion, of the heat vip 2.2A by compressing or brazing (FIG. 6). 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 a forced air cooling type, such as an axial fan, and is attached to the side surface of the base plate 1, that is, any surface perpendicular to the fins 3.

The casings 5 and 5A are designed to cover all remaining openings except for the inlet IN and outlet OUT of the cooling air from the fan 4, and are made of, for example, two metal plates such as iron or aluminum, or a plastic plate. A resin plate such as chink or the like can be used.

Note that the casing 5A is arranged parallel to the base plate 1A.
can be used as the outermost one of the fins 3.

FIG. 7 is a perspective view showing a modification of the first embodiment of the heat-vib type cooler according to the present invention.

As shown in the heat pipe 2A shown in FIG.
It can be joined to the mounting recess 1b of A with brazing material 1d. The fins 3 may be attached to the arm portions 2b, which serve as the condensing portions of the heat pipes 2, 2A, in the same manner as shown in FIG.

Note that the number of heat pipes may be one or three or more in consideration of the amount of heat conduction and the like.

FIGS. 8 to 11 are views showing a second embodiment of the Snake-to-vib type cooler according to the present invention, in which FIG. 8 is a perspective view, FIG. 9 is a plan view, and FIG. 10 is a A front view and FIG. 11 a side view.

Note that parts that perform the same functions as those in the first embodiment described above are given the same reference numerals.

In the second embodiment, the temporary base 1c and the LD are arranged in parallel, and the heating elements 6 and LD are arranged on the outer element mounting surface 1a, respectively.
6A is tightly fixed. U-shaped heat pipes 2C and 2D are attached to the mounting recesses 1b of the base plates IC and LD (Fig. 9), and the required number of fins 3 are attached to each heat pipe 2C and 2D. There is. A fan 4 is provided below the base plates IC and ID, and casings 5C and 5D are attached to the left and right sides.

In the second embodiment, since the heating elements 6 and 6A are attached to both sides, the overall thermal balance is good.

Figure 12. FIG. 13 is a diagram showing a modification of the second embodiment of the heat vip type cooler according to the present invention.

In the example shown in Fig. 12, curved parts 2C which serve as evaporation parts at both ends of a crank-shaped l wood heat pipe 2E are attached to two parallel bases l [IEIF, and a straight part 2C which serves as an intermediate condensation part is attached. 2d with fins 3 attached.

In the example of Fig. 13, two parallel base plates IG1 1
One arm portion 2e serving as the evaporating portion of the U-shaped sheet pipes 2F and 2G is attached to each of the U-shaped sheet pipes 2F and 2G, and a fin 3 is arranged on the other arm portion 2f serving as the condensing portion so as to be perpendicular to the base plates IC and IH. This is what I did. In this example, casing 5
There is no need to provide

FIGS. 14 and 15 are perspective views showing the air blowing direction of an embodiment of the heat pipe type cooler according to the present invention.

The air blowing direction can be changed depending on the mounting positions of the heath plate 1, the fan 4, the casing 5, etc.

For example, considering the first embodiment, as shown in FIG. 14, all sides of the fan 4 are connected to two base plates 1. Since it is covered by the IA and the casings 5 and 5A, the cooling air can be exhausted linearly from the surface facing the fan 4.

Furthermore, as shown in FIG.
can be bent at right angles for exhaust.

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.
It can be easily installed even when the inflow and outflow directions of cooling air are limited.

Note that the arrangement of the L-shaped base plate may be changed to bend the cooling air as shown in FIG. 15.

Similarly, in the case of the second embodiment, the cooling air
can be bent and flowed.

〔Effect 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 using a heat pipe and transmitted to the terminal fin, improving fin efficiency and improving Compared to a cooler, the volume occupied by the fins can be significantly reduced.

Further, since the fins can be made extremely thin and the pitch at which the fins are attached can be narrowed, the occupied volume can be reduced, and the weight can be significantly reduced for the same volume.

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

Furthermore, since two temporary bases are provided, it is possible to mount twice as many heating elements with the same size as the conventional one.

On the other hand, 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 6 are diagrams showing a first embodiment of a heat pipe type cooler according to the present invention, in which FIG. 1 is a perspective view;
Figure 2 is a plan view, Figure 3 is a front view, Figure 4 is a side view, Figure 5 is a perspective view showing the heat pipe attachment part, and Figure 6 is a perspective view showing the fin attachment part. be. FIG. 7 is a perspective view showing a modification of the first embodiment of the heat pipe type cooler according to the present invention. 8 to 11 are diagrams showing a second embodiment of the heat pipe type cooler according to the present invention, in which FIG. 8 is a perspective view, FIG. 9 is a plan view, and FIG. 10 is a front view. FIG. 11 is a side view. Figure 12. FIG. 13 is a diagram showing a modification of the second embodiment of the heat pipe type cooler according to the present invention. FIGS. 14 and 15 are perspective views showing the air blowing direction of an embodiment of the heat pipe type cooler according to the present invention. FIG. 16 is a perspective view showing an example of a conventional forced air cooler.

Claims (1)

[Claims] first and second base plates, each having an element mounting surface on the outside and a heat pipe mounting portion on the inside, arranged at right angles or parallel to each other, and the heat pipe mounting portions of the first and second base plates; one or more heat pipes with an evaporating section attached and a condensing section bent up; a plurality of fins attached to the condensing section of the heat pipe; and a side surface of the base plate perpendicular to the fins. A heat pipe type cooler consisting of a fan for forced air cooling.