JPH07240589A - Cooling structure for heat generator - Google Patents

Abstract

PURPOSE:To uniformly and efficiently cool an object disposed in a cooling duct wherever it is located in the cooling duct. CONSTITUTION:A cooling structure includes a cooling duct 3 for passing cooled air, objects 5 to be cooled on one surface of the cooling duct, and a partition plate 6 for dividing the cooling duct into an air supply side as a pressure chamber 3a and an air discharge side as a cooling chamber 3b including the object. The partition plate has an outlet hole 6a for cooled air made in the corresponding position to each object and also is provided with an air shielding plate 6b near each object on the windward side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating element cooling structure. In the case of forcibly cooling a heating element, such as a circuit element, arranged on one surface of a cooling duct through which cooling air is passed, there is a problem that the cooling effect differs depending on the location, and there is a demand for uniform and efficient cooling regardless of the location. There is.

[0002]

2. Description of the Related Art As shown in the side cross-sectional view of FIG. 5, a conventional heating element cooling structure has a cooling duct 13 for passing cooling air and a printed circuit board unit arranged on one surface of the cooling duct 13.
A heating element 15 (a circuit element having a radiator 15a with radiation fins fixed to its head, for example, a semiconductor device) mounted in an array on 14 and an air supply fan for feeding cooling air to both open ends of the cooling duct 13. 11 and an exhaust fan 12 for discharging the cooling air. The cooling air is sequentially cooled and discharged from the heating element 15 and its radiator 15a in the process of blowing from the bottom (air supply side) to the top (exhaust side).

[0003]

However, according to such a cooling structure as described above, the temperature of the cooling air rises every time the heating element is cooled while passing through the heating element in the process of blowing from the air feeding side to the exhaust side. There is a problem in that the cooling effect becomes worse as the temperature becomes closer to, and some of the cooling air passes directly around the cooling duct and is discharged directly without contributing to the cooling of the heating element and is wasted.

In view of the above problems, it is an object of the present invention to provide a heating element cooling structure for uniformly and efficiently cooling a heating element arranged in a cooling duct regardless of the location in the cooling duct. .

[0005]

In order to achieve the above object, in a heating element cooling structure of the present invention, a cooling duct for passing cooling air, a heating element disposed on one surface of the cooling duct, and The air duct in the cooling duct is divided into an air supply side and an exhaust side, one air supply side is used as a pressure chamber, and the other exhaust side is divided into a cooling chamber containing the heating element. The plate is configured to have a jet of cooling air opened at a position corresponding to each of the heating elements, and a wind shield plate provided in the vicinity of the windward side of each heating element.

[0006]

The cooling duct is provided with a partition plate that divides the air supply side into a pressure chamber and the exhaust side into a cooling chamber containing a heating element. The partition plate should have a jet of cooling air opened at a position corresponding to the heating element. By this, the cooling air of the pressure chambers is jetted from the jet port of the partition plate to the cooling chambers, and the jet flow immediately blows directly to the respective heating elements, so that all the heating elements can be cooled under the same conditions. Further, by providing a wind shield near the windward side of the heating element, the cooling air jetted into the cooling chamber from the jetting port of the partition plate cools the heating element and the temperature rises, but the cooling air whose temperature has risen is Since it is exhausted without being exposed to the heat generating element behind the wind shielding plate because it is shielded by the wind shielding plate later, even the heat generating element near the exhaust side can be cooled uniformly and efficiently regardless of the mounting location. You can

Further, the cooling air sent into the pressure chamber is
The cooling air blown out only from the blowout port of the partition plate is immediately blown to the heating element, so that the cooling air sent to the cooling duct can be effectively used without waste.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention will be described in detail below with reference to the embodiments shown in the drawings. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is an enlarged side sectional view of an essential part of FIG. 1, FIG. 3 is a front view taken along the line AA of FIG. 1, and FIG. 4 is a BB of FIG. FIG.

As shown in each of the drawings, the cooling structure for the heating element is provided with an air supply fan 1 and an exhaust fan 2 on each of the air supply side and the exhaust side, and a cooling duct 3 for passing cooling air in the arrow direction. A heating element 5 (a circuit element having a radiator 5a with a radiation fin fixed to its head, for example, a semiconductor device) arranged and mounted on the printed circuit board unit 4 thus arranged; and an air passage in the cooling duct 3. A partition plate 6 is divided into an air supply side and an exhaust side in one direction, one air supply side being a pressure chamber 3a, and the other exhaust side being divided into a cooling chamber 3b containing a heating element 5. This partition plate 6 is provided with a cooling air ejection port 6a at a position corresponding to each heating element 5 and a wind shield plate 6b for guiding the cooling air to a position immediately upstream of each heating element 5. .

Now, when the air supply fan 1 and the exhaust fan 2 are operated together and the cooling air is sent to the pressure chamber 3a in the cooling duct 1, the cooling air is ejected from the ejection port 6a of the partition plate 6. The jet flow is immediately blown to the radiator 5a of the heating element 5 and flows to the discharge side by the exhaust fan 2, but the flow is blocked by the wind shield plate 6b and is divided into both sides as shown in FIG. The rising cooling air is prevented from being blown again to the radiator 5a of the heating element 5 on the discharge side.

Therefore, all the heating elements can be cooled under the same temperature condition. Then, the cooling air whose temperature has risen is exhausted without being exposed to the heating element behind the windshield because it is blocked by the windshield, so even if the heating element near the exhaust side does not depend on the mounting location. It can be cooled uniformly and efficiently.

Further, the cooling air sent into the pressure chamber is
The cooling air sent out to the cooling duct can be effectively used without waste because it spouts only from the ejection port of the partition plate and is immediately blown to the heating element to perform a cooling action.

[0013]

As described above in detail, according to the present invention,
A very useful effect in the industry can be achieved such that the heating element arranged in the cooling duct can be uniformly and efficiently cooled regardless of the place in the cooling duct.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged side sectional view of an essential part of FIG.

FIG. 3 is a front view taken along the line AA of FIG.

FIG. 4 is a plan view taken along the line BB of FIG.

FIG. 5 is a side sectional view according to the related art.

[Explanation of symbols]

 3 Cooling duct 3a Pressure chamber 3b Cooling chamber 6 Partition plate 6a Jet port 6b Wind shield

Claims (1)

[Claims] 1. A cooling duct (3) for passing cooling air, a heating element (5) arranged on one surface of the cooling duct (3), and an air passage in the cooling duct (3) as an air supply side. A partition plate (6) which is divided into an exhaust side and one of the air supply sides is made into a pressure chamber (3a) and the other exhaust side is divided into a cooling chamber (3b) containing the heating element (5), The partition plate (6) has a jet of cooling air (6a) at a position corresponding to each heating element (5), and a wind shield plate (6b) near the windward side of each heating element (5). ) Is provided, the heating element cooling structure.