JPH09210581A - Radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiator of which the radiating area for a unit volume is increased and thereby an improved radiating capacity and an excellent effect of radiation are obtained, which displays also an effect of turbulence and thereby the improved radiating capacity and the excellent effect of radiation are obtained as well and which realizes these features with ease by a simple construction. SOLUTION: This radiator 7 has a construction wherein a heating body 3 is provided on one end part side of a heat pipe 2 and a radiating part 8 on the other end part side thereof. The radiating part 8 is constructed of a plurality of radiating plates stacked with hollow spaces 10 formed between them, while the other end part of the heat pipe 2 is fitted by insertion and fixed to each radiating plate. For this radiating plate, a corrugated plate 9 having continuous waveform indentations formed by bending and a flat plate 5 which are provided alternately or the corrugated plate alone is used. It is thought of, besides, that the corrugated plates 9 are put in a state of noncontact with each other or that the directions thereof are shifted by an angle of 90 degrees from each other alternately.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a radiator. That is, the present invention relates to a radiator used for radiating heat of, for example, a power transistor, a large-capacity power semiconductor, and various other heating elements.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view of a conventional radiator of this type. As shown in the figure, in the radiator 1 of this type of conventional example, the heating element 3 is arranged on one end side of the heat pipe 2,
The heat dissipation portion 4 is arranged on the other end side. And the heat dissipation part 4
In the related art, a plurality of flat plates 5 serving as heat sinks are conventionally stacked while forming hollow spaces 6 between them, and the other end of the heat pipe 2 is fitted to the flat plates 5 serving as heat sinks. It was inserted and fixed. Then, the air W for cooling flows in each hollow space 6 formed by the flat plate 5 which is such a heat dissipation plate.
By passing through, the heat comes into contact with the flat plate 5 which is a heat radiating plate, and the heat is taken away, so that the heat from the heating element 3 is radiated through the heat pipe 2.

[0003]

The following problems have been pointed out in such a conventional example. Recently, the amount of heat generated by the heating element 3 tends to greatly increase, for example, the performance of transistors and semiconductors has been remarkably improved.
On the other hand, in the radiator 1 of the conventional example described above, the surface area per unit volume of each flat plate 5 used as a radiator plate, that is, the radiator area in contact with the cooling air W is small, so that the radiator portion 4 is used. However, the heat dissipation capacity of the above is low, and it is not possible to sufficiently cope with the increase in the heat generation amount of the heating element 3 described above. As described above, the radiator 1 of the conventional example of this kind has been pointed out to have a problem in the heat radiation effect.

In view of the above situation, the present invention has been made to solve the problems of the above-mentioned conventional example, and in claim 1, a corrugated plate and a flat plate are used in combination as a heat dissipation plate. In claim 2, since only the corrugated plate is adopted as the heat dissipation plate, further in claim 3, the heat dissipation plates are in a non-contact state, and in claim 4, the directions of the heat dissipation plates are alternated by 90 degrees. By displacing them one by one, firstly, a heat dissipation area per unit volume is increased, secondly, a turbulent flow effect is exhibited, and thirdly, a radiator is proposed in which these are easily and easily realized. The purpose is to

[0005]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
In the radiator, the heat generating element is arranged on one end side of the heat pipe and the heat radiating section is arranged on the other end side. The heat radiating section is formed by stacking a plurality of heat radiating plates while forming hollow spaces between each other, and inserting the other end of the heat pipe into and fixing the heat radiating plate. And
The heat radiation plate of the heat radiation portion is characterized in that corrugated plates in which corrugated irregularities are continuously bent and formed and flat flat plates are alternately arranged. Next, claim 2 is as follows. That is, the radiator according to claim 2 is characterized in that, in the radiator according to claim 1, as the radiator plate of the radiator, only the corrugated plate is used and the flat plate is not used. . Claim 3 is as follows. That is, the radiator according to claim 3 is characterized in that, in the radiator according to claim 1 or 2, the radiator plates of the radiator part are not in contact with each other. Claim 4 is as follows. That is, according to the radiator of claim 4, in the radiator according to claim 1 or 2, the corrugated plates, which are the radiator plates of the radiator, are alternately displaced by 90 degrees. Characterize.

As described above, in the radiator of the present invention, as for the heat dissipation plate of the heat dissipation portion, the corrugated plate and the flat plate are alternately arranged in claim 1, only the corrugated plate is used in claim 2, and the mutual is defined in claim 3. The spaces are not in contact with each other, and in the fourth aspect, they are alternately shifted by 90 degrees. Then, heat from the heating element is transmitted to the heat radiating portion via the heat pipe, and cooling air passes through each hollow space formed by each heat radiating plate of the heat radiating portion, so that
When the cooling air comes into contact with the heat radiating plates, such heat is taken away and the heat generating element is radiated and cooled.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. 1, FIG. 2 and FIG. 3 are perspective views for explaining the embodiment of the present invention. FIG. 1 shows the first example thereof, and FIG. 2 (1) shows the essential parts of the second example. 2 (2) shows an essential part of the third example, FIG. 3 (1) shows an essential part of the fourth example, and FIG. 3 (2) shows an essential part of the fifth example.

First, the radiator 7 has a heating element 3 arranged on one end side of the heat pipe 2 and a heat radiation section 8 arranged on the other end side. In the heat radiating section 8, heat radiating plates composed of a plurality of corrugated plates 9 and flat plates 5 described later are stacked while forming hollow spaces 10 between them, and at the same time, the corrugated plates 9 and the flat plates 5 serving as the respective heat radiating plates are stacked. The other end of the heat pipe 2 is fitted and fixed.

These will be described in more detail. First, as is well known, the heat pipe 2 is formed by enclosing a heat medium, which is a working fluid such as water or alcohol, inside a pipe whose both ends are hermetically sealed and depressurized. It flows into the other end side, liquefies by radiating heat at the other end, and returns to the one end side by the capillary phenomenon. By repeating such an action, the heat pipe 2 goes from the heating element 3 side at one end to the heat radiating portion 8 side at the other end.
It is designed to transfer heat. Examples of the heating element 3 attached to one end of the heat pipe 2 include a power transistor, a large-capacity power semiconductor, and I
An electronic circuit such as C, an electronic substrate, an electronic component, an electronic device, a computer, a motor, and various other heat generating substances can be considered.

The heat dissipating portion 8 attached to the other end of the heat pipe 2 is the first example of FIG. 1 and (1) of FIG.
In the fourth example of the figure, a plurality of corrugated plates 9 and flat plates 5 are alternately arranged as the heat radiation plate serving as the heat radiation blades, and the second example of FIG. In the third example of the drawing and the fifth example of the drawing of (2) of FIG. 3, only a plurality of corrugated plates 9 are arranged as the heat dissipation plate. In each of the examples, the corrugated plate 9 and the flat plate 5 which are such heat dissipation plates are respectively provided in the hollow space 10
While being formed, in the illustrated example, they are arranged vertically so that they are laminated in the horizontal direction. A hole 11 is coaxially formed at the center of each of the corrugated plates 9 and the flat plate 5 as the heat dissipation plate, and the other end of the heat pipe 2 is fitted and fixed in the holes 11. The heat pipe 2 can be fixed mechanically, brazed, soldered,
Fixing with a heat conductive adhesive is appropriately selected. In addition, with respect to the corrugated plate 9 or the flat plate 5 which is the heat radiation plate at the tip, the tip of the other end of the heat pipe 2 is abutted and fixed without being inserted.

The heat dissipating portion 8 will be described in more detail below. First, aluminum is used as the base material for the corrugated sheet 9 and the flat sheet 5.
Copper or another metal foil having excellent thermal conductivity is used, and such a metal foil is used as it is for the flat flat plate 5. The corrugated plate 9 is formed by bending such a metal foil with a corrugating device using a gear or a rack, and has a corrugated unevenness with a substantially triangular cross section as shown in the drawing, Regardless of this, corrugated irregularities having a trapezoidal cross section, a rectangular cross section, and various other cross sectional shapes are continuously bent and formed at a predetermined pitch and height.

In the first example shown in FIG. 1, the corrugated plates 9 and the flat plates 5 are alternately arranged as the heat radiating plate of the heat radiating portion 8, and the brazing material, the solder, and the heat conductive adhesive are provided between them. It is fixed in contact with or abutted with an agent. And the heat dissipation part 8
When viewed as a whole, the corrugated plate 9 mainly functions for heat dissipation, whereas the flat plate 5 mainly functions for heat transfer to the corrugated plate 9. Next, in the second example shown in FIG. 2A, only the corrugated plate 9 is used as the heat dissipation plate of the heat dissipation unit 8, and
The adjacent corrugated plates 9 are separated from each other and are in a non-contact state. On the other hand, in the third example shown in FIG. 2 (2), only the corrugated sheet 9 is used as the heat dissipating plate of the heat dissipating section 8, and the brazing material, the solder, and the heat conduction between the corrugated sheet 9 are mutually. Fixed or abutted with a conductive adhesive or the like.

Further, in the fourth example shown in FIG. 3A,
As the heat radiating plate of the heat radiating portion 8, the corrugated plates 9 and the flat plate 5 are alternately arranged, and are mutually fixed or abutted with each other by a brazing material, solder, a heat conductive adhesive or the like, and The corrugated sheet 9
The directions are alternately shifted by 90 degrees. In contrast,
In the fifth example shown in FIG. 3 (2), only the corrugated sheet 9 is used as the heat dissipating plate of the heat dissipating section 8, and the corrugated sheet 9 is used as a brazing material, a solder, a heat conductive adhesive or the like. Are fixed in contact with each other or brought into contact with each other, and the corrugated plates 9 are alternately displaced by 90 degrees.

The present invention is configured as described above. Then it becomes as follows. In the radiator 7, the corrugated plate 9 and the flat plate 5 are alternately arranged in the first example of FIG. 1 and the fourth example of FIG. In contrast, in the second example of FIG. 2 (1), the third example of FIG. 2 (2), and the fifth example of FIG. 3 (2), only a plurality of corrugated plates 9 are used. There is. And in the 1st example, the 3rd example, the 4th example, and the 5th example, the corrugated plate 9 and the flat plate 5 which are a heat sink
In the second example, the corrugated plates 9 serving as the heat radiating plates are not in contact with each other, while the spaces are in contact with each other, fixed, and in contact with each other.
In addition, in the first example, the second example, and the third example, each corrugated plate 9 serving as a heat dissipation plate is used.
Are aligned in the same direction, while the fourth example,
In the fifth example, the corrugated plates 9 serving as heat dissipation plates are alternately offset by 90 degrees.

During use, heat from the heating element 3 is transferred to the heat radiating portion 8 via the heat pipe 2. Therefore, in each hollow space 10 formed by the corrugated plate 9 and the flat plate 5 which are the heat radiating plates of the heat radiating portion 8, the cooling air W from, for example, a fan for forced air cooling is supplied from the front side in the illustrated example. By passing laterally to the back side, it comes into contact with the corrugated plate 9 and the flat plate 5 and takes away the heat. In this way, heat dissipation and cooling of the heating element 3 by the radiator 7 are performed. Then, in this radiator 7, the following first, second, and third aspects are obtained.

First, in this radiator 7, since the corrugated plate 9 is used as the heat dissipation plate of the heat dissipation portion 8, the surface area per unit volume is increased as compared with the case where only the flat plate 5 is used. Therefore, the heat radiation area in contact with the cooling air W is increased, and the heat radiation ability is improved.

Secondly, in this radiator 7, the corrugated plate 9 is also used for the radiator plate of the radiator 8, so that the cooling wind W passing through each formed hollow space 10 is Since the flow is regulated by the plate 9 and turbulent, compared to the case where only the flat plate 5 is used,
The corrugated plate 9 serving as a heat radiating plate comes into stronger and sufficient contact, and the heat radiating ability is also improved in this respect. Furthermore, the second
In the radiators 7 of the examples, the fourth example, and the fifth example, the corrugated plate 9 serving as the heat dissipation plate is used.
The spaces are not in contact with each other, or the corrugated plate 9 is shifted by 90 degrees. As a result, the cooling air W, which has been taken up and warmed while passing through each hollow space 10 in the horizontal direction in the drawing, partially escapes in the vertical direction perpendicular to the passing direction as shown in the drawing. From this aspect, turbulent flow also occurs, and the heat dissipation capability is improved. These are particularly remarkable in the fourth example and the fifth example.

Thirdly, these use corrugated plates 9 as the heat dissipating plates of the heat dissipating portion 8 of the radiator 7, and in the second example, the corrugated plates 9 serving as the heat dissipating plates are not in contact with each other. Example or 5
As in the example, it is easily realized by a simple configuration in which the corrugated plate 9 serving as a heat dissipation plate is shifted by 90 degrees.

In the radiator 7 of the second example, the cooling air W passing through the hollow spaces 10 is provided by making the corrugated plates 9 serving as the radiator plates of the radiator 8 non-contact with each other. ,
The pressure loss is particularly small, and this aspect also has the advantage of improving the heat dissipation capability. On the other hand, in the radiators 7 of the first example, the third example, the fourth example, and the fifth example, the corrugated plates 9 and the flat plates 5 as the heat radiating plates are brought into contact fixing or abutting state. There is an advantage that the shape retention of the heat dissipation portion 8 is excellent.

[0020]

As described above, the radiator according to the present invention employs a combination of a corrugated plate and a flat plate as the heat radiating plate in the first aspect. By adopting only the above, further in claim 3, the heat sinks are not in contact with each other, and in the fourth aspect, the directions of the heat sinks are alternately shifted by 90 degrees, thereby exhibiting the following effects. To do.

First, the heat dissipation area per unit volume increases. That is, in this radiator, since a corrugated plate is used for the heat radiation plate of the heat radiation portion, the surface area per unit volume and the heat radiation area are increased as compared with the heat radiator of this type of conventional example described above,
The heat dissipation capacity is improved. As a result, the heat dissipation effect is excellent such that it can sufficiently cope with the recent increase in the amount of heat generated by the heating element.

Secondly, a turbulent flow effect is also exhibited. That is, in this radiator, a corrugated plate is used for the radiator plate of the radiator, and the cooling air turbulently flows. The ability is improved and the heat radiation effect is further improved. Further, in the radiator of claims 3 and 4, the heated cooling air partially rises and escapes when the radiator plates are brought into non-contact with each other or shifted by 90 degrees. A turbulent flow is also generated, and the heat dissipation capability of the heat dissipation part is improved and the heat dissipation effect is extremely excellent as compared with the above-described conventional radiator of this type. In the radiator of claim 3, the pressure loss of the cooling air is reduced by setting the heat radiation plates in a non-contact state, and the heat radiation ability is improved and the heat radiation effect is excellent also from this aspect. There is also an advantage.

Third, and yet they are easily implemented. That is, in this radiator, a corrugated plate is used as the heat radiation plate of the heat radiation portion, and in the third and fourth aspects, the heat radiation plates are easily brought into non-contact with each other or shifted by 90 degrees to facilitate the above-mentioned first method. , The second point is realized. In this way, all the problems in this type of conventional example are solved,
The effects exhibited by the present invention are remarkably large.

[Brief description of drawings]

FIG. 1 is a perspective view of a first example of a radiator according to the present invention, which is used for describing an embodiment of the invention.

FIG. 2 (1) is a perspective view of an essential part of the second example,
(2) FIG. 6 is a perspective view of a main part of the third example.

FIG. 3 (1) is a perspective view of an essential part of the fourth example,
(2) FIG. 6 is a perspective view of a main part of the fifth example.

FIG. 4 is a perspective view of a radiator of this type of conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radiator (conventional example) 2 Heat pipe 3 Heating element 4 Radiating part (conventional example) 5 Flat plate 6 Hollow space (conventional example) 7 Radiator (invention) 8 Radiator (invention) 9) Corrugated plate 10 Hollow space (of the present invention) 11 Hole W Wind

Claims (4)

[Claims] 1. A heat radiator in which a heating element is arranged on one end side of a heat pipe and a heat radiating section is arranged on the other end side of the heat pipe. And the other end of the heat pipe is fitted and fixed to each of the heat radiating plates, and the corrugated unevenness is continuously folded as the heat radiating plate of the heat radiating portion. A radiator characterized in that curved corrugated plates and flat flat plates are alternately arranged. 2. The radiator according to claim 1, wherein only the corrugated plate is used as the heat radiating plate of the heat radiating portion, and the flat plate is not used. 3. The radiator according to claim 1, wherein the radiator plates of the radiator are in non-contact with each other. 4. The radiator according to claim 1 or 2, wherein the corrugated plates, which are the radiator plates of the radiator, are alternately offset by 90 degrees.