JPS6178199A - Air-cooling device for electronic apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air cooling device for electronic equipment used in information processing devices and the like.

[Conventional technology]

In recent years, electronic devices used in various information processing devices such as computers have become smaller and faster, so electronic devices such as multiple integrated circuit packages and other electronic components are mounted in high density. A board is implemented,
In electronic devices, the amount of heat generated per unit volume of electronic components is increasing.

For this reason, conventionally, electronic equipment is provided with an air cooling device to remove heat within the equipment. For example, the fifth
The figure shows an air cooling device for electronic equipment disclosed in Japanese Patent Application Laid-Open No. 53-145054, in which a frame 1 has a plurality of printed boards 3 on which a number of electronic components 2 are mounted. A blower 4 is disposed on both sides of the printed board 3 and is configured to send air horizontally. Reference numeral 5 denotes a duct member that covers the mounting surface of the printed board 3 and prevents the air from leaking, and is attached to each printed board 3. Reference numeral 6 denotes a duct member formed in the shape of a housing to cover the blower 4 and the duct member 5, and a space formed by the duct member 6 is defined from side to side by partition plates 7. By opening only the upper part of the right side space and the lower part of the left side space, air is sucked in by the blower 4 from the left lower part of the duct member 6, and the air is sent into the duct member 5 to dissipate the heat of the electronic component 2. After stealing it, the air blower on the right side a! 1
4 is configured to exhaust air whose temperature has increased from the upper part of the space on the right side partitioned by a partition plate 7.

By the way, there is a huge demand for faster speeds in electronic devices, and as electronic components become more highly integrated, printed circuit boards carrying electronic components are mounted closer together and the connection distance between each electronic component is reduced. It is required to be short.

Furthermore, as the packaging density improves, the amount of heat generated per unit area also increases.

[Problem that the invention seeks to solve]

However, in the conventional air cooling system for this type of electronic equipment, printed boards 3 are placed adjacent to each other on the left and right, and when transmitting signals between these printed boards 3, the blower 4 is arranged on both sides of the printed board 3. There was a problem that the connection distance became long. Furthermore, there is also the inconvenience that it is not possible to cope with an increase in the amount of heat generated by electronic components. In other words, in order to cope with the increase in the amount of heat generated by electronic components, it is necessary to increase the size of the blower 4 and increase the air volume, thereby increasing the cross-sectional area of the duct for air intake and exhaust. It is required to increase the indicated depth dimension, but if this is done, the electronic component 2 will be located at the back, and the electronic component 2
This is because maintenance and replacement work becomes difficult.

This study was developed in view of these circumstances, and its purpose is to shorten the connection distance between electronic components and to cope with the increase in heat generation of electronic components without making maintenance and replacement work difficult. The company provides air cooling equipment for electronic equipment.

[Means for solving problems]

The air cooling device for electronic equipment according to the present invention includes a blower that blows air toward the front side from ventilation holes that are disposed on both sides of an exhaust duct on the back side of the printed board and that are opened on both sides of the printed board, and a blower that blows air to the front side of the printed board. an exhaust duct that introduces air flowing along the mounting surface of the vehicle through the opening and exhausts it upward; the ventilation opening and the opening extend vertically;
The exhaust duct is widened to accommodate the printed board.

[Effect]

In the present invention, the ventilation opening opened on the side of the printed board is narrowed to reduce the amount of protrusion of the device to the side of the printed board, and the exhaust duct for discharging air upward from the ventilation opening is made thin. to reduce the amount of protrusion toward the front of the printed board.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an air cooling device for electronic equipment according to the present invention, seen from the front side; FIG. 2 is a perspective view of the same as seen from the back side;
3 is a sectional view taken along the line I-III in FIG. 1, and FIG. 4 is a sectional view taken along the line IV-rV in FIG.
2 shows two printed boards constituting an electronic device, and a plurality of electronic components 11 forming an electronic circuit are mounted on the front side of this printed board 10. 12 is a frame on which these printed boards 10 are mounted, and this frame 12 has a larger front shape than the printed boards 10,
A surface on which the printed board 10 is mounted is formed on the front side. Further, the frame 12 is formed in a substantially concave shape in cross section in plan view, and has sleeve portions 12a, 12a extending vertically on the side portions of the back side. By attaching a flat cover 13 to the back surface of these sleeve portions 12a, an intake air which extends vertically on the back side of the printed board 10 is closed by the frame 12 in the upper direction and opened only in the downward direction. A duct 14 is formed.

Reference numeral 15 designates four blowers that are installed on both sides of the intake duct 14 by being attached to the sleeve portion 12a through an opening provided on the back surface. The suction side of this blower 15 is a sleeve portion 12a.
The air outlet side is connected to four inlets 16 provided on the sides of the frame 1, and the outlet side is connected to the frame 1 on both sides of the printed board 10.
It is connected to four ventilation holes 17 opened at 2. The ventilation port 17 has a rectangular cross section extending in the vertical direction, and the blower 15 sucks in external air from the suction port 16, and blows this air from the ventilation port 17 to the front side of the printed board IO. do.

Reference numerals 18 and 18 denote air leakage prevention plates arranged above and below the printed board 10, and 19 and 19 denote a flat inner cover attached to the frame 12 so as to cover the front side of the printed board 10. The ventilation hole 17 and the printed board 1
A fluid passage 20 is formed which covers the front side of the printed board 10 and guides air blown from the ventilation port 17 by the blower 15 inward in the horizontal direction along the mounting surface of the printed board 10. The fluid passage 20 is defined at the center by a partition plate 21 extending in the vertical direction.

22. 22 is two inner covers divided into upper and lower parts 19.
19, and forms an upwardly open exhaust duct 23 between it and the inner cover 19. The outer cover 22 corresponding to the lower printed board IO is closed at the bottom and closed at the top. is open, and the outer cover 22 corresponding to the upper printed board 10 has both the bottom and top sides open. In addition, outer cover 2
2 is formed in a shape that corresponds to the shape of the printed board 10 and extends in the width direction. That is, the exhaust duct 2
3 is formed wide to correspond to the printed board 10.

24.24 is an opening extending in the vertical direction provided in a position corresponding to the partition plate 21 of the inner cover 19, and air in the fluid passage 20 is discharged from this opening 24 to the exhaust duct 23.
It is introduced into the interior and expelled from above.

A cable connector 25 is attached to the upper or lower side of the printed board 10 and connects a signal cable 26 to a printed board mounted on another electronic device, and 27 is a cable connector for connecting a signal between the printed boards 10 and 10 mounted above and below. A signal pin 28 protruding from the back side of the printed circuit board 10 for connection is a wire connecting these signal pins 27 and 27.

In the air cooling device for electronic equipment configured in this way,
External air flows into the intake duct 14 from below, passes through the intake port 16, is sucked into the blower 15 disposed on the back side of the printed board 10, and is sucked into the printed board from the ventilation ports 17 on both sides of the printed board 10. Air is blown to the front side of 10. This blown air flows inside the fluid passage 20 along the mounting surface of the printed board 10. After the heat generated by contact with the mounted electronic components 11 is taken away, the direction is changed by the partition plate 21, and the heat is introduced from the opening 24 into the wide exhaust duct 23, and is exhausted from above. .

In other words, unlike in the past, the blower does not protrude to the side of the printed board 10, and since the ventilation port 17 extends in the vertical direction, even if the width is made small, the amount of air required for air circulation is reduced. Since the cross-sectional area of the opening can be obtained, the ventilation opening 17 can be narrowed, and the protrusion (2) in which the frame 12 protrudes to the side of the print+iio can be reduced.

Therefore, even when electronic devices on which printed circuit boards 10 are mounted are disposed adjacent to each other, the printed circuit boards 10 can be placed close to each other.

In addition, the exhaust duct 23 is formed on the front side of the printed board 10, and the exhaust duct 23 is made wide to correspond to the printed board 10, so the length of the exhaust duct 23 in the width direction is increased compared to the conventional one. Can be made larger. As a result, the amount of protrusion of the exhaust duct 23 indicated by M in FIG.
Even if the exhaust duct 23 is formed, the required cross-sectional area of the exhaust duct 23 can be obtained. In other words, by making the exhaust duct 23 thinner, the amount of forward protrusion of the printed board 10 can be reduced.

Moreover, since the width of the exhaust duct 23 is larger than the thickness, the cross-sectional area can be increased without increasing the amount of protrusion.

〔Effect of the invention〕

As explained above, according to the present invention, there is a blower that blows air toward the front side from the ventilation holes that are arranged on the back side of the printed board and that are open on both sides of the printed board, and the air that is blown by this blower is applied to the mounting surface of the printed board. It is equipped with an exhaust duct that introduces the air flowing along the line and exhausts it upward, and the ventilation opening extends vertically, so the ventilation opening can be narrowed to reduce the amount of protrusion of the device to the side of the printed board. Can be made smaller. Furthermore, since the exhaust duct is formed wide, the cross-sectional area can be increased even if the amount of protrusion toward the front of the printed board is reduced.

Therefore, since the printed boards can be brought close to each other, the connection distance between electronic components can be shortened. Further, since the amount of forward protrusion of the exhaust duct of the printed board can be reduced and the electronic components can be brought close to the surface, maintenance and replacement of the electronic components can be improved. Moreover, even if the cross-sectional area of the exhaust duct is increased in order to improve the cooling performance, it is not necessary to increase the amount of protrusion so much.
It is possible to cope with an increase in the amount of heat generated by electronic components.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an air cooling device for electronic equipment according to the present invention, seen from the front side, FIG. 2 is a perspective view of the same as seen from the back side, and FIG. 3 is a cross-sectional view taken along line mm in FIG. 1. , FIG. 4 is a sectional view taken along the line IV-■ in FIG. 1, and FIG. 5 is a perspective view showing a conventional air cooling device for electronic equipment. 10...Printed board, 11...Electronic component, 14
...Intake duct, 15...Blower, 17...
- Ventilation port, 2o...Fluid passage, 21...Partition plate, 23...Exhaust duct, 24...Opening.

Claims (1)

[Claims] In electronic devices that have multiple printed circuit boards mounted with electronic components mounted on a frame, there is an air intake duct formed on the back side of the printed board, and ventilation holes that are arranged on both sides of this air intake duct and open on both sides of the printed board. A blower blows air from the front to the front side, a fluid passageway that guides the air blown by the blower inward along the mounting surface of the printed board, and an opening provided near the partition plate that divides this fluid passageway from side to side. and an exhaust duct that introduces the air from and discharges it upward,
An air cooling device for electronic equipment, characterized in that the ventilation port and the opening extend vertically, and the exhaust duct is formed wide to correspond to the printed board.