JPH0414960Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Fields> The present invention relates to a cooling plate having a flow path for a coolant therein, and in particular to mounting for pressing the cooling plate onto an object to be cooled such as a substrate. Regarding structure.

<Conventional technology> Conventionally, in order to absorb heat generated by elements such as semiconductors, resistors, capacitors, etc. mounted on a board and radiate the heat to the outside, a flow path that can be connected to an external cooling system has been provided inside. , a cooling plate is used to circulate the coolant.

When attaching this type of cooling plate to an object to be cooled, there is a method in which the cooling plate is sandwiched between crimping plates and tightened to the object to be cooled with bolts or the like. However, if the rigidity of the crimping plate is not sufficient, sufficient crimping force may not be applied to the center of the cooling plate due to the mounting position of the bolts or the tightening force. It was not effective and had the disadvantage that if the rigidity was made sufficiently large, the pressure bonding plate would become very thick. Another method is to drill bolt holes through the frame member on the outer periphery of the cooling plate and fix it to the object to be cooled, but as in the case described above, the crimp force will be low near the center of the cooling plate. There was a problem.

For this reason, a method is used in which bolt holes are formed through the flow passages in the center of the cooling plate, and the bolt holes are tightened with bolts while sealing with a gasket or the like. However, because the bolt holes directly pass through the flow path, even if gaskets are used, they are not sufficiently sealed, resulting in leakage of coolant or gaps between the cooling plate and the object to be cooled, resulting in insufficient cooling. There was a problem that it was not effective.

(Problem to be solved by the invention) Therefore, the purpose of the invention is to enable bolt holes to be provided at arbitrary positions depending on the object to be cooled in the cooling plate described above, and to ensure uniform crimping at all times. The object of the present invention is to provide a compact cooling plate which has high heat transfer efficiency with the object to be cooled.

<Means for Solving the Problems> According to the present invention, the above-mentioned object is formed by integrally joining two face plates and a frame member sandwiched between the two face plates. , a cooling plate having a flow path for a coolant therein, wherein a spacer member is integrally joined to both of the surface plates and disposed within the flow path, and a spacer member is disposed in the flow path to penetrate one of the surface plates. This is achieved by providing a cooling plate characterized in that bolt holes are formed leading from one face plate to the other said face plate.

<Function> By doing so, the bolt holes can be provided at desired positions on the surface plate depending on the object to be cooled so that the coolant does not leak out.

<Embodiments> The present invention will now be described in detail with reference to specific embodiments with reference to the accompanying drawings.

As shown in FIG. 1, the cooling plate 1 according to the present invention includes thin rectangular surface plates 2 and 3 arranged parallel to each other and separated from each other, a frame member 4 sandwiched between them, and an inner It is formed by integrally joining corrugated fins 5 arranged in the fins by brazing or the like. One end of the cooling plate 1 is provided with a coolant intake port 6 and a coolant discharge port 7 that are connected to an external cooling system. Inside the cooling plate 1, a coolant flow path 8 is formed by fins 5, and the coolant flowing from the intake port 6 flows through the flow path 8 while passing through the surface plate 2 or 3. It absorbs heat and discharges it from the discharge port 7 to radiate the heat to the outside. Further, a plurality of bolt holes 9 are drilled in the surface plates 2 and 3 through which bolts are inserted for crimping the cooling plate 1 to the object to be cooled.

As shown in FIG. 2, the cooling plate 1
Inside, a surface plate 2,
A cylindrical stud 10 is arranged as a spacer member to separate the through holes 1 and 3 from each other.
1 forms a bolt hole which coincides with the hole 9 on the surface plates 2 and 3 and communicates from one surface plate to the other surface plate. The studs 10 have the same height as the fins 5, and are integrally joined to the surface plates 2 and 3 at the upper and lower ends, respectively, so that no coolant leaks from the joints. A portion of the fin 5 around the stud 10 is cut out into a circle having a diameter larger than the outer diameter of the stud 10, so that the stud 10 is placed at the center of the circle. This circular hole 12 ensures that the flow path 8 is not blocked by the studs 10 and that the coolant introduced into the cooling plate 1 can smoothly flow along the flow path 8 without being obstructed by the studs 10. I can do it. The diameter of the circular hole 12 is set to be as small as possible in consideration of the flow rate of the coolant and the dimensions of the stud 10 so that the flow path resistance does not increase significantly and in consideration of the heat transfer effect.

The state in which the coolant 1 configured in this way is pressed onto an object to be cooled such as a substrate is shown. Cooled object 1
3 has a screw hole 14 drilled in advance at a predetermined position. The cooling plate 1 is placed on the object to be cooled 13 with the bolt holes 9 aligned with the screw holes 14, and screwed in with the screws 15. At this time, even if you tighten the screw 15 with a considerable tightening force, the stud 10 at the same height as the fin 5
is integrally joined to both surface plates 2 and 3 by brazing, etc., so that the vicinity of the bolt hole 10 of the cooling plate 1 may be deformed, creating a gap between the cooling plate 1 and the object to be cooled 13, or the bolt Coolant does not leak out from the holes 9.

Moreover, the present invention is not limited to the above-mentioned embodiments,
It can be implemented with various modifications and changes. For example, the stud 10 of this embodiment is formed into a cylindrical shape, and the fins 5 are cut into a circular shape, but this minimizes the flow path resistance, does not impede the flow of the coolant, and impairs the heat transfer effect. It may have any other shape. Further, although the stud 10 shown in FIGS. 1 and 2 is placed at the center of the flow path 8, it may be placed at a desired position depending on the object to be cooled, for example, by penetrating through the fins so as to straddle adjacent flow paths. It is also possible to provide one. Furthermore, the studs 10 can be formed integrally with one surface plate and joined together with the frame member and fins to the other surface plate.

<Effects of the invention> As described above, according to the invention, the bolt holes can be provided at desired positions on the cooling plate depending on the shape and characteristics of the object to be cooled, thereby making it possible to uniformly cover the entire cooling plate. Since it can be crimped, the degree of adhesion with the object to be cooled is increased, the heat transfer efficiency is improved, and the object to be cooled can be cooled uniformly over the entire surface of the object to be cooled.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a cooling plate according to the present invention. FIG. 2 is a partially enlarged plan view of the embodiment shown in FIG. 1 with a portion of the surface plate cut away. Figure 3 shows
FIG. 2 is a sectional view showing an attached state of the embodiment of FIG. 1; 1... Cooling plate, 2, 3... Surface plate, 4... Frame member, 5... Fin, 6... Intake port, 7... Outlet port, 8... Channel, 9... Bolt hole, 10 ... Stud, 11 ... Through hole, 12 ... Round hole, 13 ...
Cooled object, 14...screw hole, 15...screw.

Claims (1)

[Claims for Utility Model Registration] (1) It is formed by integrally joining two surface plates and a frame member sandwiched between the two surface plates, and has a flow path for a coolant inside. A cooling plate having: a spacer member integrally joined to both the surface plates and disposed in the flow path, passing through the spacer member and extending from one of the surface plates to the other surface plate. A cooling plate characterized by having bolt holes formed therein. (2) The flow path is defined by fins integrally joined to both the surface plates, and the fins are partially cut out around the spacer member to ensure the flow of the coolant. A cooling plate according to claim 1 of the utility model registration claim, characterized in that: