JPH08153985A - System for locally cooling electronic device - Google Patents

Abstract

PURPOSE: To efficiently cool an electronic device with the minimum number of cooling fans by providing a perforated plate or a duct fitting plate fitting with ducts through which cooling air from the fans is locally blown out without dispersion and locally cooling only the heat generating section in the device. CONSTITUTION: A heat generating section 9 is efficiently cooled by locally blowing out cooling air from a cooling fan through a perforated plate and a duct fitting plate 18 fitted with ducts 12 without dispersion so that the wind velocity can be increased. When the perforated plate and a duct fitting plate through which cooling air from the cooling fan is locally blown out without dispersion are provided, the cooing air from the fan is locally blown out in a large quantity and the heat generating section 9 can be cooled efficiently. Therefore, the noise can be suppressed and the power consumption can be reduced. In addition, the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system for electronic devices, and more particularly to a local cooling system for intensively cooling a heat generating part in the device.

[0002]

2. Description of the Related Art Conventionally, a device requiring cooling has been cooled by blowing cooling air with a cooling fan. As the number of heat generating parts increases, many cooling fans are required to satisfy the required cooling temperature in the entire device. It was attached to the device.

A related device of this type is, for example, Japanese Patent Laid-Open No. 4-111108.

[0004]

Since the above-mentioned prior art is designed so as to satisfy the required cooling temperature in the entire apparatus, the cooling air is evenly distributed to the parts requiring cooling and the parts not requiring cooling. Since it is sprayed, the cooling efficiency is poor, and a cooling fan is mounted more than necessary, resulting in unnecessary noise, extra power consumption, and high cost.

Further, in a device having a complicated structure, there is a drawback that the cooling air cannot be blown sufficiently to the heat generating portion even if a large number of cooling fans are attached because other components block the cooling air blowing path. .

It is an object of the present invention to cool the heat generating portion efficiently and intensively so that the cooling air is locally blown out without being dispersed and can be cooled by a minimum necessary cooling fan.

[0007]

In order to achieve the above object, the first means: When a cooling fan can be mounted in the immediate vicinity of a heat generating part, a cooling air of the cooling fan is provided between the cooling fan and the heat generating part. By providing a perforated plate with a plurality of holes for localizing the cooling air, and localizing so as to locally blow out the cooling air without dispersing it, the heat generating portion in the device is efficiently and intensively cooled.

Second means: When the cooling fan cannot be mounted in the immediate vicinity of the heat generating part, between the cooling fan and the heat generating part,
One hole covers and fixes the cooling fan, and the other has a plurality of holes and a duct that locally blows out the cooling air of the cooling fan without dispersing it, and localizes the cooling air of the cooling fan. Efficiently and intensively cools the heat generating part.

The above two means are provided to localize the cooling air so that the cooling air is not dispersed but locally blown, and cooling can be performed by the minimum necessary cooling fan.

[0010]

In the local cooling system of the electronic device of the present invention, when the perforated plate is used, the cooling air blown from the cooling fan is the hole of the perforated plate mounted between the cooling fan and the heat generating part. By passing through it, it is locally blown out to increase the wind speed, and the minimum necessary cooling fan efficiently cools the heat generating portion. Also, when using a duct, the cooling air blown from the cooling fan is locally blown out by passing through the hole of the duct mounted between the cooling fan and the heat generating part, increasing the wind speed, and the required minimum Cools the heat generating part efficiently with the limited cooling fan.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, 4, and 5.

FIG. 1 is a mechanical diagram of a local cooling type perforated plate using the perforated plate of the present invention, in which 1 is a cooling fan,
2 is a cooling fan fixing plate, 3 is a cooling fan fixing screw,
4 is a perforated plate fixing screw, 5 is a perforated plate, 6 is an unnecessary perforated plate, and 7 is a cooling air outlet. Cooling fan 1
Is a cooling fan fixing plate 2 and a cooling fan fixing screw 3
Attach to the perforated plate 5 at. The perforated plate 5 is mounted on the electronic device with the perforated plate fixing screws 4. If there are multiple holes on the perforated plate 5 and unnecessary holes are not needed, attach the unnecessary hole blocking plate 6 with an adhesive or screws to close the holes. Is also available. The cooling air outlet 7 is provided with a short nozzle so that the cooling air is not dispersed but localized.

FIG. 2 is a block diagram of a local cooling system using the perforated plate of FIG. 8 is a non-heating part, 9 is a heating part, and 10
Is an electronic circuit board on which electronic components such as logic elements are mounted. In the case where the electronic components mounted on the electronic circuit board 10 do not generate heat so much as the non-heat generating portion 8 and the heat generating components are the heat generating portion 9, the non-heat generating portion 8 does not need to be cooled intensively and heat is generated. The part 9 needs to be cooled intensively. When the cooling fan 1 can be mounted near the heat generating portion 9, the perforated plate 5 is attached between the cooling fan 1 and the heat generating portion 9 with the perforated plate fixing screw 4. The cooling air blown from the cooling fan 1 passes through the cooling air blowing port 7 of the perforated plate 5 and is locally blown out without dispersing the cooling air, thereby increasing the wind speed and reducing the required minimum. Cooling fan 1
To efficiently cool the heat generating portion 9.

FIG. 3 shows the duct body of the present invention.
Is a duct mounting portion, 12 is a duct, and 13 is a duct outlet fixing portion. The duct 12 has a bellows structure that can expand and contract.

FIG. 4 is a diagram showing the mechanism of the duct. 11 is a duct mounting portion, 12 is a duct, 13 is a duct outlet fixing portion, 14 is a cooling fan, 15 is a cooling fan fixing plate, and 16 is a cooling fan. A fixing screw, 17 is a hole plate fixing screw, 18 is a duct mounting plate, 19 is a duct unnecessary hole closing plate, and 20 is a duct mounting hole. The cooling fan 14 is attached to the duct mounting plate 18 with the cooling fan fixing plate 15 and the cooling fan fixing screw 16, and there are a plurality of duct mounting holes 20 for mounting the duct 12. The mounting holes 20 are covered with a duct unnecessary hole closing plate 19 so that it can be used even when there are many places where cooling is required.

FIG. 5 is a block diagram of a local cooling system using the ducts of FIGS. 3 and 4. Reference numeral 8 is a non-heat generating portion, 9 is a heat generating portion, 10 is an electronic circuit board on which electronic components such as logic elements are mounted, and 21 is a duct outlet fixing plate. In the electronic component mounted on the electronic circuit board 10, if the component that does not generate much heat is the non-heat generating portion 8 and the component that generates heat is the heat generating portion 9, it is not necessary to intensively cool the non-heat generating portion 8. The heat generating portion 9 needs to be intensively cooled. When the heat generating portion 9 is located farther than the cooling fan 14, the duct mounting portion 11 is fixed to the duct mounting plate 18 with screws,
The duct 12 is extended to each heat generating part 9, and a duct outlet fixing plate 21 is mounted near the heat generating part 9 so that the duct outlet does not move. The duct outlet fixing part 21 is attached to the duct outlet fixing plate 13. Secure with screws. Unnecessary duct mounting holes 20 are covered with a duct unnecessary hole closing plate 19. The cooling air blown from the cooling fan 14 passes through the holes of the duct 12 and is locally blown out without dispersing the cooling air, thereby increasing the wind speed, and the cooling fan 14 of the minimum required efficiency. Well heating part 9
To cool.

According to the present embodiment, the cooling air from the minimum number of cooling fans is not dispersed and is locally blown out to efficiently cool the heat generating portion, thereby suppressing the generation of unnecessary noise and consuming it. This has the effect of reducing power consumption and cost.

[0018]

According to the present invention, the cooling air blown from the cooling fan is locally blown out by providing the perforated plate and the duct which locally blows out the cooling air of the cooling fan. Since the air volume becomes large and the cooling fan can be efficiently cooled with the minimum necessary cooling fan, there is an effect that unnecessary noise is suppressed, power consumption is reduced, and cost is reduced.

[Brief description of drawings]

[Fig.1] Mechanical diagram of perforated plate

FIG. 2 is a block diagram of a local cooling system using a perforated plate.

[Figure 3] Duct body

FIG. 4 Mechanism of duct

FIG. 5 is a block diagram of a local cooling system using a duct.

[Explanation of symbols]

1 ... Cooling fan, 2 ... Cooling fan fixing plate, 3 ... Cooling fan fixing screw, 4 ... Perforated plate fixing screw, 5 ... Perforated plate, 6 ... Unnecessary hole blocking plate, 7 ... Cooling air outlet, 8 ...
Non-heat generating part, 9 ... Heat generating part, 10 ... Electronic circuit board on which electronic components such as logic elements are mounted, 11 ... Duct mounting part, 1
2 ... duct, 13 ... duct outlet fixing part, 14 ... cooling fan, 15 ... cooling fan fixing plate, 16 ... cooling fan fixing screw, 17 ... perforated plate fixing screw, 18 ... duct mounting plate, 19 ... Duct unnecessary hole blocking plate, 20 ... duct mounting hole, 21 ... duct outlet fixing plate.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Kanai, 810 Shimoimaizumi, Ebina City, Kanagawa, Ltd., Office Systems Division, Hitachi, Ltd. (72) Hiroshi Takiue, 810 Shimoimaizumi, Ebina, Kanagawa Factory Office Systems Division

Claims (2)

[Claims] 1. An electronic device for cooling a heat-generating part by a cooling fan, wherein a plurality of holes are locally blown between the cooling fan and the heat-generating part so that the cooling air of the cooling fan is not dispersed and is blown out locally. A local cooling method for an electronic device, which is characterized by centrally cooling a heat generating part in the device by providing a plate and localizing cooling air. 2. The cooling fan according to claim 1, wherein the cooling fan is covered and fixed by the one hole between the cooling fan and the heat generating portion, and the plurality of holes and the cooling air of the cooling fan are not dispersed in the other and are locally distributed. A local cooling system for an electronic device, which is characterized in that a duct mounting plate having a blow-out duct is provided and the cooling air of a cooling fan is localized to centrally cool a heat generating part in the device.