JPH0719159Y2 - Integrated circuit cooling element structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] Regarding a cooling element structure of an integrated circuit in a water-cooled computer in which cooling water is used as a refrigerant, a joining method such as brazing or welding of the cooling element is abolished, and it is inexpensive and the refrigerant In order to provide a cooling element structure that does not leak and that significantly improves the reliability of the system, in the cooling element structure that supplies the coolant from the coolant supply plate side to the integrated circuit on the printed circuit board, the cooling circuit contacts the integrated circuit. A bellows integrally formed with a flat cooling bottom part and a bent end edge formed by bending the upper end outwardly, and a bellows fixed to the refrigerant supply plate and provided with a notched step part on the inner circumference. A flange, the bent end edge of the upper end of the bellows is placed on the notched step portion of the flange, and is pressed and fixed by a seal ring.

[Industrial application field]

The present invention relates to a cooling element structure of an integrated circuit in a water-cooled computer using cooling water as a coolant.

[Conventional technology]

Conventionally, this type of cooling element is set between an integrated circuit 2 mounted on a printed circuit board 1 and a coolant supply plate 4 for supplying a coolant (cooling water) 3, as shown in FIG. In this configuration, the cooling plate 5 that contacts the integrated circuit 2
And a flexible bellows 7 having upper and lower ends joined between a cooling plate 5 and a flange 6 fixed to the coolant supply plate 4 with screws.

Then, as a means for joining the bellows 7 to the cooling plate 5 and the flange 6, soft brazing (Sn-Pb, Ag-Pb solder) or welding (electron beam, TIG welding) is usually used.
Has been done.

In addition, a seal ring 9 such as an O-ring is embedded in the chamber provided in the flange 6 in order to prevent the refrigerant 3 from leaking through the gap between the plate 4 and the flange 6 caused by a slight design error or the like. Has been done.

[Problems to be solved by the device]

However, in the conventional cooling element structure, the bellows 7 must be evenly joined to the cooling plate 5 and the flange 6 in the circumferential direction of the joining portion indicated by reference numeral 8 in FIG.
It has been pointed out that skilled technology is required to obtain a good joining state, and if a joining failure occurs, the reliability of the system will be greatly reduced due to leakage of the refrigerant. .

Further, when the welding method is used as the joining means, there is a problem that the cost becomes high in addition to the skilled work.

Therefore, the object of the present invention is to abolish the conventional joining means such as soft brazing and welding in the cooling element structure in the integrated circuit, integrate the cooling plate and the bellows, and significantly reduce the cost. Moreover, it is another object of the present invention to provide a cooling element structure capable of reliably preventing leakage of the refrigerant and significantly improving the reliability of the system.

[Means for Solving the Problems]

In the cooling element structure for supplying the refrigerant from the side of the refrigerant supply plate 13 to the integrated circuit 11 on the printed circuit board 10, a flat cooling bottom portion 14 which comes into contact with the integrated circuit and a bent portion formed by bending the upper end outwardly. The bellows 16 integrally formed with the end edge 15 in the upper and lower sides, and a flange 17 fixed to the refrigerant supply plate and provided with a notch step portion 18 in the inner periphery, the notch step portion of the flange of the bellows upper end It is characterized in that the bent edge is placed and pressed and fixed by a seal ring.

[Action]

Based on the above configuration, the present invention adds a bellows fixing function to a seal ring that has conventionally only had a refrigerant leakage prevention function, and as a result, the joint portion of the cooling element is combined with the integration of the bellows. It becomes unnecessary. In addition, the conventional techniques such as soft brazing or welding which require skill can be eliminated, the man-hours can be greatly reduced, and the leakage of the refrigerant due to the defective joint can be reliably prevented.

〔Example〕

An embodiment of the cooling element structure according to the present invention will be described below.
A detailed description will be given with reference to FIG.

FIG. 1 is a partial cross-sectional view showing a cooling element structure in an integrated circuit of a water-cooled computer, in which an integrated circuit 11 is mounted on one surface of a printed board 10 such as a ceramic board. A coolant supply plate 13 that supplies a coolant (cooling water) 12 is arranged facing the integrated circuit 11 at a predetermined distance from each other.

The cooling element according to the present invention is set between the integrated circuit 11 and the coolant supply plate 13.

This cooling element includes a bellows 16 in which a flat bottom portion 14 for contact with the integrated circuit 11 and a bent edge 15 having an upper edge bent outward are integrally formed above and below the bellows 16.
And a flange 17 for mounting the cooling medium supply plate 13 on the cooling medium supply plate 13.

The flange 17 is fixed to the refrigerant supply plate 13 by a screw (not shown), and a notch step portion 18 is formed on the inner periphery thereof. As shown in an enlarged view in FIG.
Place the bent edge 15 of the bellows 16 on the notch step portion 17 of 17,
Furthermore, by inserting the O-ring 19 on the upper side,
The bellows 16 can be firmly attached and fixed to the refrigerant supply plate 13 side by the elastic force of the O-ring 19.

Thus, the cooling element structure according to the present invention has a bellows 16 structure.
And the bottom 14 for cooling are integrally molded, and the bellows 16
Since the upper bent edge 15 is hooked on the notch step portion 18 of the flange 17 and then pressed and held by the O-ring 19, the assembly is completed easily and the cost is greatly reduced. It goes without saying that the refrigerant 12 can be expected and the leakage of the refrigerant 12 can be surely prevented.

Further, the integral molding method of the bellows 16 and the cooling bottom portion 14 is
Mechanical forming may be performed by drawing a plate-shaped material such as beryllium copper or phosphor bronze into a cylindrical shape, then forming the bellows 16 by hydraulic forming, and adjusting the spring constant in the pickling process.

[Effect of device]

As described above, according to the cooling element structure of the present invention, it is possible to eliminate the joint portion of the cooling element, eliminate the conventionally troublesome work such as soft brazing, welding, etc., and easily assemble. Therefore, it is possible to expect a significant cost reduction, and it is possible to reliably prevent the leakage of the refrigerant due to a defective joint, so that the reliability of the system is significantly improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a cooling element structure according to the present invention, and FIG. 2 is a sectional view showing a conventional cooling element structure. In the figure, 10 is a printed circuit board, 11 is an integrated circuit, 13 is a coolant supply plate, 14 is a cooling bottom, 15 is a bent edge, 16 is a bellows,
Reference numeral 17 is a flange, 18 is a notch step portion, and 19 is an O-ring.

Claims (1)

[Scope of utility model registration request] 1. A cooling element structure for supplying a coolant from a coolant supply plate (13) side to an integrated circuit (11) on a printed circuit board (10), wherein a flat cooling bottom portion which contacts the integrated circuit (11) ( 14) and the bent edge (15) with the upper edge bent outward
A bellows (16) integrally formed on the upper and lower sides, and a flange (17) fixed to the refrigerant supply plate (13) and provided with a notch step portion (18) on the inner circumference. A cooling element structure for an integrated circuit, in which a bent edge at the upper end of a bellows is placed on a step portion and is fixed by pressing with a seal ring.