JPH0964568A - Radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the cooling efficiency of a radiator fixed with a heating body being cooled by a fluid fed from an axial fan. SOLUTION: A radiating section 14 arranged on a radiator board 12 fixed with a heating body 13 comprises a large number of planar fins 16 having plate surface arranged in parallel with the channel of air flow being fed from an axial fan. The fins are arranged at rough interval in the central part 14a of radiating section 14 where the cooling air supply is low and arranged at fine interval on the opposite side parts 14b where the cooling air supply is high. When the cooling air is supplied to the radiating section 14, the air flow is used sufficiently for cooling depending on the radiating area. Furthermore, a part of air flows into the central part 14a and the cooling air is fed uniformly to the radiating part thus ensuring the radiating area depending on the quantity of cooling air being fed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiator mounted with a heating element cooled by a fluid supplied from an axial fan.

[0002]

For example, for cooling an electronic device, a cooling device including a radiator having a heating element attached thereto and an axial fan for supplying a fluid to the radiator is provided. 7 and 8 show an example of a radiator. In the heat radiator 1, the heat generator 3 is mounted on one surface of the heat radiation substrate 2, and the heat radiation portion 4 is arranged on the other surface. This heat dissipation part 4
Is composed of a large number of plate-shaped fins 5, and each fin 5
As shown in FIG. 8, the plate surface is arranged at a constant interval so that the plate surface is parallel to the flow path of the fluid generated from the axial fan 6 arranged at an appropriate interval from the heat radiating section 4. It is arranged. Then, the heat of the heating element 3 is transmitted to each fin 5 via the heat dissipation substrate 2. In such a configuration, the fluid is supplied from the axial fan 6 to the heat radiating portion 4, so that the heating element 2 can be cooled.

As another heat radiating body, as shown in FIG. 9, the heat radiating portion 7 is constituted by a square tube portion 8 in a lattice shape, and a fluid is supplied along the side surface of each square tube portion 8. In some cases, the heating element 9 is cooled.

However, since the fluid flow from the axial fan 6 is a swirl flow, the supply amount is small in the central portion 4a of the heat radiating portion 4 and large in both side portions 4b. Therefore, in such a structure, the flow rate for cooling is insufficient for the central portion 4a of the heat radiating portion 4 composed of the fins 5 arranged at regular intervals, and for both side portions 4b of the heat radiating portion 4. Has a disadvantage that the heat radiation surface of the heat radiation portion 4 is not effectively used.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat radiator that can effectively utilize the heat radiation surface of the heat radiation portion and thus can improve the cooling efficiency.

[0006]

In order to achieve the above-mentioned object, the present invention provides a radiator arranged in a flow path of a fluid supplied from an axial fan and cooled by the fluid to cool a heating element, The heat dissipating part substrate to which the heating element is attached, and the heat dissipating part formed on the heat dissipating part substrate are provided. The heat dissipating part has a large number of plate-like members whose plate surfaces are arranged in parallel with the fluid flow paths. The fins are configured so that the fin spacing is roughly formed in the central portion of the fin group, and the fin spacing is densely formed in both side portions of the fin group.

In the heat dissipating member constructed as described above, in both side parts of the heat dissipating part where the amount of fluid supplied from the axial fan is large,
Since the fins are closely formed, the heat radiation area is increased, and the flow path resistance is increased so that a part of the fluid wraps around to the central portion of the heat radiation portion. On the other hand, in the central portion of the heat radiating portion where the amount of fluid supplied from the axial fan is small, the fin interval is roughly formed, so the heat radiating area is reduced and the flow path resistance is reduced, so that part of the fluid is It comes around from both sides of the heat dissipation part.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. Radiator 11
A heat generating body 13 is attached to the heat dissipating section substrate 12 and a heat dissipating section 14 is disposed on the opposite side of the heat dissipating body 13.
It is adapted to be transmitted to the heat dissipation portion 14 via.

There is an appropriate space between the heat dissipating portion 14 and
An axial fan 15 used as a blower fan is provided, and a fluid (air in this case) generated from the axial fan 15 is supplied to the heat radiating portion 14 to cool the heating element 13. .

The heat radiating portion 14 includes a large number of plate-shaped fins 16
However, the plate surface is arranged so as to be parallel to the flow path of the air flow generated by the axial fan 15.
Then, this fin group includes the central portion 14a of the heat dissipation portion 14.
Then, the fin spacing is rough, and the fin spacing is narrow in both side portions 14b.

Next, the operation of the radiator 11 having the above structure will be described. When the axial fan 15 is driven,
The cooling air becomes a swirl flow and is supplied to the heat radiating portion 14, so that the cooling air supply amount is large in both side portions 14b of the heat radiating portion 14 and is small in the central portion 14a.

In this case, since the fin intervals are close in each side portion 14b of the heat radiating portion 14, that is, the heat radiating area is large, the supply amount of the cooling air is not excessive and the flow path resistance is not increased. As a result, a part of the air flow comes around to the central portion 14a of the heat dissipation portion 14.

On the other hand, the central portion 14 of the heat dissipation portion 14
In a, since the fin spacing is coarse, that is, the heat dissipation area is formed small, the supply amount of cooling air does not become insufficient, and the flow path resistance also becomes small. It comes to come around from the portion 14b.

As described above, according to this embodiment, since the heat radiating portion 14 has a shape having a heat radiating area corresponding to the amount of cooling air supplied from the axial fan 15, the air flow is excessive or insufficient. The cooling air is supplied to the heat radiating portion 14 evenly because the cooling air is supplied to the heat radiating portion 14 by circulating the air flow from a portion having a high flow path resistance to a portion having a low flow path resistance. It is possible to secure a heat dissipation area according to the amount of the heat, and thus improve the cooling efficiency.

FIG. 3 shows an essential part of the second embodiment of the present invention, and the differences from the first embodiment will be described below. The heat radiating part 17 is a lattice-shaped rectangular tube part 1.
8 is formed, and each side wall of each rectangular tube portion 18 is arranged so as to extend parallel to the flow path of the air flow generated from the axial fan. In the heat radiating portion 17, the lattice of the rectangular tubular portion 18 is formed large at the central portion 17a, and the lattice of the rectangular tubular portion 18 is formed small at both side portions 17b of the heat radiating portion 17, so that the cooling air It is possible to secure a heat dissipation area according to the amount of supply, and thereby improve cooling efficiency.

FIG. 4 shows an essential part of the third embodiment of the present invention, and the differences from the first embodiment will be described below. The heat radiating portion 19 has a central portion 1
9a, a plate surface is formed with a large number of plate-shaped fins 20 arranged in parallel to the air flow passages, and at both side portions 19b, side surfaces are formed in a grid shape and extend in parallel to the air flow passages. By forming the rectangular tube portion 21, it is possible to secure a heat radiation area corresponding to the amount of supply of cooling air, and thus it is possible to improve cooling efficiency.

A fourth embodiment of the present invention will be described with reference to FIG. The radiator 22 has a case 24 disposed at one end of a radiator substrate 23, and an axial fan 25 disposed in the case 24. The radiator substrate 23 has a heating element 26 attached thereto. At the same time, a heat radiating section 27 is arranged on the opposite side of the heating element 26. The heat radiating portion 27 is composed of a large number of plate-shaped fins 28 arranged such that the plate surface thereof is parallel to the flow path of the air flow generated by the axial fan 25.
The fin group and the axial fan 25 are arranged with an appropriate interval, and a space portion 30 is formed between them by the guide tube portion 29. The space portion 30 acts as a pressure chamber and eliminates the bias of the supply amount of the cooling air, so that a heat radiation area corresponding to the amount of the supply amount of the cooling air can be secured, thus improving the cooling efficiency. You can

FIG. 6 shows an essential part of the fifth embodiment of the present invention, and the differences from the fourth embodiment will be described below. The heat radiating portion 31 is composed of a large number of plate-shaped fins 32 whose plate surfaces are arranged in parallel with the flow paths of the air flow, and the length of each fin 32 in the flow path direction is measured from both side parts 31a of the fin group to the central part. By forming it so that it becomes shorter toward 31b, it is possible to secure a heat dissipation area according to the amount of supply of cooling air, and thus it is possible to improve cooling efficiency.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications within the scope of the invention.

[0020]

As is apparent from the above description, according to the first aspect of the present invention, plate-shaped fins are formed in the heat radiating portion, and the fin intervals on both sides of the fin are made narrower, and the fins at the central portion are formed. By making the intervals rough, the fluid can be used for cooling without excess or deficiency. In addition, the cooling air circulates from the part with high flow resistance to the part with low flow resistance,
Since the fluid is evenly supplied to the heat radiating portion, it is possible to secure a heat radiating area corresponding to the amount of cooling air supplied, and it is possible to improve the cooling efficiency.

According to the invention described in claim 2,
By making the grid on both sides smaller and making the grid on the center larger, the fluid can be used for cooling without excess or deficiency. Furthermore, since the fluid circulates from the part with high flow resistance to the part with low flow resistance, the fluid is evenly supplied to the heat dissipation part, so a heat dissipation area can be secured according to the amount of the fluid supply, and cooling efficiency can be improved. Can be improved.

According to the third aspect of the invention,
By forming the square tube portions in a grid shape on both sides thereof and forming the plate-like fins in the central portion thereof, the fluid can be used for cooling without excess or deficiency. Furthermore, since the fluid circulates from the part with high flow resistance to the part with low flow resistance, the fluid is evenly supplied to the heat dissipation part, so a heat dissipation area can be secured according to the amount of the fluid supply, and cooling efficiency can be improved. Can be improved.

According to the invention described in claim 4,
It is formed by plate-shaped fins arranged at an appropriate interval from the axial fan, and the unevenness of the supply amount is eliminated by the space formed by the guide cylinder between the fin group and the axial fan. Therefore, the fluid can be used for cooling without excess or deficiency. Furthermore, since the fluid circulates from the part with high flow resistance to the part with low flow resistance, the fluid is evenly supplied to the heat dissipation part, so a heat dissipation area can be secured according to the amount of the fluid supply, and cooling efficiency can be improved. Can be improved.

According to the invention described in claim 5,
It is composed of a large number of plate-shaped fins, and the length of each fin in the flow path direction is shortened from both sides to the center of the fin group, so that the fluid can be used for cooling without excess or deficiency. Become. Further, since the cooling air circulates from the portion having a high flow path resistance to the portion having a low flow resistance, the cooling air is uniformly supplied to the heat radiating portion, so that a heat radiating area corresponding to the amount of the fluid supply can be secured. It becomes possible to improve the cooling efficiency.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a plan view

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a front view showing a third embodiment of the present invention.

FIG. 5 is a side view showing a fourth embodiment of the present invention in a partial cross section.

FIG. 6 is a bottom view showing the fifth embodiment of the present invention as a partial cross section.

FIG. 7 is a front view showing a conventional example.

FIG. 8 is a plan view.

FIG. 9 is a front view showing another conventional example.

[Explanation of symbols]

In the drawing, 11 is a radiator, 12 is a radiator substrate, 13 is a radiator, 14 is a radiator, 15 is an axial fan, 16 is a fin,
17 is a heat dissipation part, 18 is a square tube part, 19 is a heat dissipation part, 20 is a fin, 21 is a square tube part, 22 is a heat dissipation part, 23 is a heat dissipation part substrate, 25 is an axial fan, 26 is a heat generation part, 27 is Heat dissipation part,
28 is a fin, 29 is a guide tube portion, 30 is a space portion, 31
Is a heat radiating portion, and 32 is a fin.

Claims (5)

[Claims] 1. A heat radiator arranged in a flow path of a fluid supplied from an axial fan and cooled by the fluid to cool a heat generating element, wherein a heat radiating portion substrate to which the heat generating element is mounted and the heat radiating portion substrate. And a heat dissipating part formed, wherein the heat dissipating part is composed of a large number of plate-shaped fins whose plate surfaces are arranged in parallel with the flow path of the fluid, and the fin spacing is at the center of the fin group. A heat radiator characterized in that the fins are roughly formed, and the fin intervals are closely formed on both sides of the fin group. 2. A heat radiator arranged in a flow path of a fluid supplied from an axial fan and cooled by the fluid to cool a heat generating element, wherein a heat radiating portion substrate to which the heat generating element is attached and the heat radiating portion substrate. And a heat dissipating part formed, wherein the heat dissipating part is composed of a lattice-shaped square tube portion whose side surfaces extend in parallel to the flow path of the fluid, and the square tube portion is formed at a central portion of the square tube portion group. Is large, and the lattices of the square tube portions are formed small on both sides of the square tube portion group. 3. A heat radiator arranged in a flow path of a fluid supplied from an axial fan and cooled by the fluid to cool a heat generating element, wherein a heat radiating portion substrate to which the heat generating element is attached and the heat radiating portion substrate. A heat dissipation portion formed, wherein the heat dissipation portion is formed with a large number of plate-shaped fins whose plate surface is arranged in parallel with the flow path of the fluid in the central portion thereof, A radiator, which is formed of a rectangular prismatic tubular portion extending in parallel to the fluid flow path. 4. A heat radiator arranged in a flow path of a fluid supplied from an axial fan and cooled by the fluid to cool a heat generating element, wherein A heat dissipation part formed, wherein the heat dissipation part is composed of a large number of plate-shaped fins whose plate surface is arranged in parallel with the fluid flow path, and the fin group and the axial fan are A heat radiator, characterized in that a space is formed between the group of fins and the axial fan by a guide cylinder portion, the space being formed at an appropriate interval. 5. A radiator arranged in a flow path of a fluid supplied from an axial fan and cooled by the fluid to cool a heating element, wherein A heat dissipation part formed, wherein the heat dissipation part is composed of a large number of plate-shaped fins whose plate surfaces are arranged in parallel with the flow path of the fluid, and the length of each fin in the flow path direction is A heat radiator characterized in that it is formed so as to become shorter from both side portions to the central portion of the fin group.