JPH0385797A - Cooling device for electric equipment - Google Patents

Abstract

PURPOSE:To sufficiently cool ICs on the substrates inside a case and suppress noise by setting up a pass partition between ventilation courses of a plurality of fans. CONSTITUTION:The title device is a cooling device for an electric equipment consisting of a chassis 2 mounted with ICs fixed in parallel in the vertical direction, a plurality of fans 8, 9 installed above on the chassis 2 and sucking out air between the chassis in the upper direction, a case 1 to be mounted with the fans 8, 9 and the chassis 2 and an approximately L-shaped pass partition 10 being mounted on the upper part of the case 1 and mutually partitioning air sent out from the fans 8 and 9. That is, the pass partition 10 ranging from between the fan 8 and the fan 9 to an outlet air vent 7 is fixed to the chassis or to the case 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a cooling device for electrical equipment such as an electronic computer.

(Prior Art) A conventional electronic computer consists of a chassis housing a plurality of circuit boards equipped with a large number of ICs, a power supply, and ancillary equipment such as a magnetic tape drive device and a magnetic disk drive device, etc., housed in a housing. In particular, ICs generate a large amount of heat and tend to reach high temperatures, so it is necessary to maintain reliability by keeping the temperature below a certain level. Therefore, multiple fans are attached to the chassis and the room temperature is controlled through the inlet vent installed in the chassis. The cooling device has a configuration in which air is sucked in, the air cools the IC by passing between the substrates, and is discharged from the exit vent.

(Problem to be Solved by the Invention) In the above configuration, since the outlet vent is usually only on one side of the back of the electronic device, the air coming out from the fan far from the outlet vent and the fan close to the outlet vent is After interference, the air is discharged from the outlet vent, and the air coming out of the fan hits the air coming out of the other fan and is pushed back, i.e., it is subjected to a force that pushes it toward the outlet vent. become. Therefore, one fan will blow less air than the other fan, the loss of wind pressure will be greater and the air volume will be reduced, and the wind speed between boards far from the exit vent will be lower than the wind speed between boards near the exit vent. , the wind speed distribution between each board becomes uneven, and in order to increase the wind speed between boards far from the exit vent, which is the minimum wind speed, and obtain the wind speed necessary for cooling the IC, a fan with a large air volume must be used. must,
There was a problem that the noise became louder.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling device for electrical equipment such as a computer that can sufficiently cool an IC on a board inside a housing and suppress noise by improving the above-mentioned drawbacks.

[Structure of the Invention] (Means for Solving the Problems) The present invention has a configuration in which a board housed in a housing is ventilated and cooled by a fan. This is a cooling device for electrical equipment that consists of a partition plate fixed to a housing or chassis with a ventilation path extending between the exit vents and between the ventilation paths of multiple fans. A partition plate will be installed.

(Function) By installing a partition plate between the ventilation paths of multiple fans, the air coming out of the fans far from the outlet vents will not be pushed back by the wind coming out of the fans near the outlet vents. Since the pressure loss of the fan that is discharged from the outlet and far from the outlet vent does not become large and the air volume does not decrease, the air velocity between the outlet vent and the follower board does not decrease.

(Example) Next, one embodiment of the present invention will be described.

FIG. 1 shows a chassis 2 mounted with a plurality of ICs and fixed in a vertically flat manner, and a plurality of fans 8, which are attached to the top of the chassis 2 and suck air between the chassis 2 upward. 9, a housing 1 to which the fans 8, 9 and the chassis 2 are attached, and an abbreviated partition plate 10 attached to the upper part of the housing 1 to separate the air sent out from the fans 8, 9 from each other. The device is shown.

That is, a partition plate 10 extending from between the fans 8 and 9 to the outlet ventilation lower is fixed to the chassis or the housing 1.

A chassis 2 that houses a plurality of circuit boards 3 equipped with a large number of ICs.
It is constructed by housing a power supply, ancillary equipment such as a magnetic tape drive device and a magnetic disk drive device, etc. in a housing 1.
C has a large calorific value and tends to reach high temperatures, so it is necessary to maintain reliability by keeping the temperature below a certain level. Therefore,
A cooling system in which a plurality of fans 4 are attached to the chassis 2 and air at room temperature is sucked in from an inlet vent 5 installed in the chassis, the air cools the IC by passing between the boards 6, and is discharged from the outlet vent lower. It is structured.

According to the above, the present invention allows the air coming out of the fan far from the outlet vent to be discharged from the outlet vent by the partition plate without being pushed back by the wind coming out of the fan near the outlet vent,
The pressure loss of the fan far from the outlet vent does not become large and the air volume does not decrease, and therefore the wind speed between the boards far from the outlet vent does not decrease, making it possible to equalize the wind speed between each board. , cooling capacity can be secured with a small fan without using a fan with a large air volume, and electronic computers and electronic equipment with suppressed noise can be obtained.

FIG. 2 is an explanatory diagram of the effect of the present invention, showing the wind speed on the side A far from the outlet vent and the side B close to the outlet vent. It shows the characteristics of curve M.

[Effects of the Invention] According to the present invention, the required air flow of the fan can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a cooling device showing one embodiment of the present invention, and FIG. 2 is an explanatory diagram showing wind speed distribution.

Claims (1)

[Claims] A plurality of chassis mounted with a plurality of ICs and fixed in a vertically flat manner, a plurality of fans attached to the upper part of these chassis and sucking air between the chassis upwardly, these fans and the above-mentioned A cooling device for electrical equipment, comprising a casing to which a chassis is attached, and a partition plate attached to the top of the casing to separate air sent out from the fan.