JPS6312197A - Cooler - 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] [Summary] A motherboard is housed so as to divide the interior of a case in which refrigerant is circulated, and a shielding layer is formed on the motherboard. The printed circuit board and the power supply unit are formed so that they are not affected by electromagnetic radiation.

[Industrial application field]

The present invention relates to a cooling device that cools a motherboard, which has a printed circuit board and a power supply unit mounted on both sides, by housing it in a case in which a coolant is circulated, and more particularly, the present invention relates to a cooling device that cools a motherboard, which has a printed board and a power supply unit mounted on both sides, by housing it in a case in which a coolant is circulated. and the power supply unit are formed so as to be shielded from each other by the shielding layer.

Electronic components such as LSI elements, which are widely used in electronic devices, have recently become more densely packaged and faster, making it difficult for electronic devices configured with many of these electronic components to operate stably. To achieve this, a cooling device is used to forcibly cool each electronic component.

As such a cooling device, a method of immersing electronic equipment in a refrigerant is known as a cooling method with the highest cooling efficiency.

However, such immersion of electronic devices is done by storing them in a metal case or the like where a refrigerant is circulated, so if electromagnetic waves such as noise are generated from a part of the electronic device, the entire electronic device will be affected by the electromagnetic waves. It turns out.

Therefore, in such a case, it is desired that even if electromagnetic waves are generated, the entire electronic device housed therein is formed so as not to be affected by the electromagnetic waves.

[Conventional technology]

Conventionally, the structure was as shown in the conventional perspective view of FIG.

As shown in FIG. 3, a printed circuit board 15 on which electronic components such as an LSI element 20 are mounted and a motherboard 14 on which a power supply unit 16 is locked are housed in a case 10, and a supply port 11 provided in the case 10 is housed. The refrigerant 7 is supplied from the tube 13 in the direction of the arrow A and flows out from the tube 13 of the discharge port 12 in the direction of the arrow B, thereby circulating the refrigerant 7 in the indoor room 10A.

Therefore, by circulating this coolant 7, the printed board 15
And the power supply unit 16 is cooled.

Further, the signal line connected to the printed board 15 is connected to a connector 1 fixed to each of the printed board 15 and the side wall 10B.
7 and 18 are connected by a wiring material 19, and similarly, the power line connected to the power supply unit 16 is connected to a power connector 21 and a cable 22 fixed to the side wall 10B.
The connection is made by

Such a case 10 needs to be formed firmly to have a certain degree of strength and also to prevent leakage of the refrigerant 7, and therefore, it is generally formed of a metal material. ing.

Moreover, a predetermined portion of the side wall 10B is connected to the ground G so that static electricity is not generated on the side wall 10B of the case 10 and noise is not transmitted to the outside.

[Problem that the invention seeks to solve]

However, in such a configuration, when electromagnetic waves are generated from the power supply unit 16, although there is a shielding effect from the outside of the case 10, electronic components such as the LSI element 20 of the printed board 15 installed inside the case 10 are It is affected by that electromagnetic radiation.

Therefore, there have been problems such as malfunctions.

[Failure to solve the problem]

FIG. 1 is a plan view of the principle of the zero invention.

As shown in Fig. 1, the supply port (2) supplies the refrigerant (7).
) and a discharge port (3) for discharging the refrigerant (7), a printed circuit board (5) is mounted on one side, a power supply unit (8) is mounted on the other side, and the case ( 1
) The motherboard (4
), and the refrigerant (7) is installed in each divided room.
At the same time, a shielding layer (6) is formed on the motherboard (4), and the inner wall surface of the case (1) is formed so that the shielding layer (6) has electrical continuity. (1A).

With this configuration, the above-mentioned problems are solved.

[For production]

That is, the motherboard is fixed so as to divide the interior of the case, a printed circuit board and a power supply unit are mounted on each of both sides of the motherboard, and a shielding layer is provided on the motherboard. is connected to the inner wall of the case so that the printed board and power supply unit mounted on both sides are not affected by electromagnetic radiation.

Therefore, even if electromagnetic waves are generated in the power supply unit on one side of the divided room, the electromagnetic waves will be shielded by the shielding layer on the printed board on the other side, making it possible to prevent them from being affected by electromagnetic radiation. Therefore, it is possible to prevent the printed board from malfunctioning as in the conventional case.

〔Example〕

The present invention will be explained in detail below with reference to FIG.

FIG. 2 is an explanatory diagram of an embodiment according to the present invention, in which (a) is a perspective view and (b) is a sectional view. The same reference numerals indicate the same objects throughout the figures.

As shown in FIG. 2(a), a case 1 houses a motherboard 4 with a printed board 5 mounted with electronic components such as an LSI element 20 on one side and a power supply unit fixed on the other side. The refrigerant 7 is supplied to each divided indoor IC from the tube 13 of the supply port 2 as shown by arrow A, and the refrigerant is discharged from the tube 13 of the discharge port 3 as shown by arrow B. 7 is configured so that each indoor IC is circulated.

Further, as shown in the DD cross-sectional view of (b), this motherboard 4 has a shielding layer 6 formed thereon, and a pattern 6A electrically connected to the shielding layer 6 and the inner wall surface 1A of the case 1 are connected by a connector 9. The case 1 and the shielding layer 6 are connected to each other and are configured to have electrical continuity.

In this case, the shielding layer 6 needs to be formed in a net shape to avoid through holes etc. built into the motherboard 4.
Such a shielding layer 6 can be easily formed using a multilayer printed circuit board.

Furthermore, the signal line connected to the printed circuit board 5 and the power line connected to the power supply unit are fixed to the side wall IB, and connected by the connector 17 and the wiring material 19, and the cable 22, as described above. The power supply connector 21 is configured to be connected to the power supply connector 21, respectively.

With this configuration, for example, even if electromagnetic waves are generated from the power supply unit 8, the shielding layer 6 is connected to the ground G via the case 1, so that the printed board on the opposite side of the power supply unit 8 5, the electromagnetic waves are shielded by the shield N6, and the printed board 5 is not exposed to electromagnetic radiation.

〔Effect of the invention〕

As explained above, according to the present invention, the interior of the case is divided by the motherboard on which the shielding layer is formed, and the printed circuit board and the power supply unit are housed in each divided interior. .

Therefore, the printed circuit board and the power supply unit are shielded by the shielding layer, and it is possible to prevent malfunctions caused by electromagnetic waves from the power supply unit as in the conventional case, which has a great practical effect.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the principle of the present invention. FIG. 2 is an explanatory diagram of an embodiment according to the present invention, in which (a) is a perspective view and (b) is a sectional view. FIG. 3 shows a conventional perspective view. In the figure, 1 is the case and 2 is the supply port. 3 is the outlet, 4 is the motherboard. 5 is a printed board, 6 is a shielding layer. 7 indicates a refrigerant, and 8 indicates a power supply unit. , Kuzume Hoshi Senmachi Entei 1 Garden

Claims (1)

[Claims] A case (1) provided with a supply port (2) for supplying a refrigerant (7) and a discharge port (3) for discharging the refrigerant (7);
Printed board (5) on one side, power supply unit (8) on the other side
are mounted on the case (1), and a motherboard (4) housed so as to divide the interior of the case (1), and cooling is performed by circulating the refrigerant (7) in each of the divided interiors. At the same time, a shielding layer (6) is formed on the motherboard (4), and the shielding layer (6) is electrically connected to the inner wall surface (1A) of the case (1). Features a cooling device.