JP2002162187A - Laminated cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability upon the press work of an intermediate plate 3 and restrict the deterioration of life of a press mold. SOLUTION: Two kinds of intermediate plates 3 used for a laminated cooler and different in the slit pattern thereof are manufactured by press work. The slits 9 are provided in parallel with a substantially constant pitch and are formed in a slanted direction with respect to the intermediate plate 3. In this case, a partitioning part 11 is provided at the central part of the intermediate plate 3 whereby the length of the slits 9 is regulated by the partitioning part 11. In another word, the slits 9 are formed so as to be divided into both sides of the partitioning part 11. According to this method, the slits 9 will not be too long even when the slits 9 are formed obliquely with respect to the intermediate plate 3 and, therefore, workability upon punching the slits 9 by a press mold is improved and the peripheral length of the press mold can be shortened whereby a load impressed on the press mold is lightened and the life of the mold can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated cooler for cooling a heating element by laminating a plurality of plates to form a cooling passage therein, and allowing a cooling liquid to flow through the cooling passage.

[0002]

2. Description of the Related Art For example, an inverter device that requires a large current for a vehicle or the like requires a large amount of heat generated by a heating element, and thus requires forced cooling using cooling water or the like. Therefore,
The present inventor has devised a stacked cooler in which two types of intermediate plates are alternately stacked, and two outer plates are overlapped on both outer layers to form a cooling water passage inside. As shown in FIGS. 6A and 6B, the intermediate plate has header openings 110 on both sides, and a plurality of slits 120 are formed between the header openings 110 in a diagonal direction at a substantially constant pitch. Is formed. When the two types of intermediate plates 100 are alternately stacked, the slits 120 communicate with each other to form a mesh-shaped cooling water passage.

[0003]

However, when the slit 120 of the intermediate plate 100 is punched out by a press, the longer the slit 120, the worse the workability and the longer the circumference of the press die. Since the applied load is large, the mold life is shortened. Also, slit 1
When the length of the rib 20 is long, the rib 130 between the adjacent slits 120 is also necessarily long.
30 can easily be deformed. In particular, when the slit 120 is formed obliquely with respect to the intermediate plate 100, the above problem is likely to occur because the slit 120 is extremely long. The present invention has been made based on the above circumstances, and an object of the present invention is to improve the workability when pressing an intermediate plate in a stacked cooler configured by stacking a plurality of plates, and An object of the present invention is to provide a laminated cooler capable of suppressing a reduction in the life of a press die.

[0004]

(Means for Solving the Problems) A plurality of intermediate plates having a plurality of slits are laminated, and an outer plate is overlapped on both outer layers thereof, and a coolant is passed through the slits. A laminated cooler for cooling a heat-generating component attached to a surface of an outer plate, wherein an intermediate plate has a partition for regulating a length of a slit. By providing this partition portion on the intermediate plate, it is possible to prevent the slit from becoming too long.

(Means of Claim 2) In the laminated cooler according to Claim 1, the intermediate plate has a plurality of slits formed in a diagonal direction in parallel with a substantially constant pitch.
When the slit is formed obliquely with respect to the intermediate plate, the slit becomes extremely long without a partition,
By providing a partition that regulates the length of the slit, the slit can be set to an appropriate length.

According to a third aspect of the present invention, in the laminated cooler according to the first or second aspect, the intermediate plate has a partition portion provided along a flow direction of the coolant. In this case, the influence of the provision of the partition portion on the intermediate plate on the flow of the coolant is small, and the flow of the coolant is not largely obstructed by the partition portion, so that the initial cooling performance can be secured.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an intermediate plate, and FIG. 4 is a perspective view of a laminated cooler. The laminated cooler 1 cools a heat-generating component 2 such as an inverter module or a converter used for an electric vehicle, for example, and laminates a plurality of intermediate plates 3 (3A, 3B) and two outer plates 4. Then, after assembling a set of pipes 5, it is manufactured by integral brazing.

A) As the intermediate plate 3, a brazing sheet having a brazing material layer on the surface (one surface) of a metal plate (for example, an aluminum plate) having a certain thickness is used. The intermediate plate 3 is manufactured by press working into two types shown in FIGS. 1A and 1B, each of which has a set of header openings 6 (6a, 6b), a set of pipe mounting portions 7, Bolt holes 8 and a plurality of slits 9 are provided. The header openings 6 are provided on both sides of the intermediate plate 3 in the longitudinal direction (the vertical direction in FIG. 1), and open in a large rectangular shape in the width direction (the horizontal direction in FIG. 1). However, the header opening 6a provided on one intermediate plate 3A is closer to the header opening 6 provided on the other intermediate plate 3B.
The width in the longitudinal direction (the vertical width in FIG. 1) is wider than b.

The pipe mounting portion 7 is an opening for mounting the pipe 5, is provided at the center of both ends in the longitudinal direction of the intermediate plate 3, and communicates with the header opening 6. The bolt holes 8 are round holes through which bolts 10 (see FIG. 4) for fixing the heat-generating components 2 to the cooler 1 are provided. Six bolt holes 8 are formed between the header openings 6. In the present embodiment, as shown in FIG.
Are attached, and one heat generating component 2 is fixed with two bolts 10.

As shown in FIG. 1, the slits 9 are provided in parallel between the header openings 6 at a substantially constant pitch and substantially the same slit width, and are formed obliquely with respect to the intermediate plate 3. I have. However, a partition 11 is provided at the center of the intermediate plate 3 in a direction connecting the header openings 6, and the length of the slit 9 is regulated by the partition 11. That is, the slits 9 are formed separately on both sides of the partition 11 (left and right sides of the intermediate plate 3). In addition, the direction of the slits 9 of the one intermediate plate 3A and the other intermediate plate 3B is formed so that the slits 9 do not coincide with each other when the two plates are overlapped. A region indicated by a broken line A in the drawing indicates a range in which the mounting position of the heating element built in the heating component 2 is projected on the intermediate plate 3.

As shown in FIG. 2, the two types of intermediate plates 3 are alternately stacked (the number of the intermediate plates 3 may be any number) so that the directions of the slits 9 are opposite to each other. Thereby, the slit 9 provided on the left side of both plates 3A, 3B
And the slits 9 provided on the right side communicate with each other to form a cooling channel in a mesh shape, and the header openings 6 of the plates 3A and 3B overlap with each other to form the inlet header 12 and the outlet header 13. It is formed. Further, since the header opening 6a of one intermediate plate 3A and the slit 9 of the other intermediate plate 3B communicate with each other, the inlet header 12 and the outlet header 13 communicate with each other via the cooling channel.

B) The outer plate 4 is formed by laminating a plurality of intermediate plates 3 and overlapping both outer layers, thereby closing both the upper and lower surfaces of the cooler 1. As shown in FIG. 3, six bolt holes 8 are formed in the outer plate 4, and the heat-generating component 2 is mounted on the plate surface, and is fixed by bolts 10. c) The pipe 5 connects an external cooling water circuit (not shown) and the cooler 1, and is attached to the pipe attachment portion 7, respectively, and communicates with the inlet header 12 and the outlet header 13.

Next, the operation and effect of the cooler 1 will be described. The cooling water supplied to the one pipe 5 from the external cooling water circuit flows into the inlet header 12 from the one pipe 5, flows from the inlet header 12 through the cooling flow path formed by the slit 9, and then flows out of the outlet header. The refrigerant is returned from the other pipe 5 to the external cooling water circuit via 13. As a result, the heating element incorporated in the heating component 2 is cooled by the cooling water.

Since the length of the slit 9 of the intermediate plate 3 used in the cooler 1 of this embodiment is regulated by the partition portion 11, even if the slit 9 is formed in an oblique direction, the slit 9 is long. It can be limited to an appropriate length without becoming too much. As a result, the workability when punching the slit 9 with a press die is improved, and the circumference of the press die can be shortened, so that the load on the press die is reduced and the life of the die can be extended. Further, by reducing the length of the slit 9, the strength of the intermediate plate 3 is improved, and the deformation of the intermediate plate 3 during transportation or the like can be prevented. In particular, in this embodiment, since the partition 11 is formed in the direction connecting the header openings 6 of the intermediate plate 3, the flow of the cooling water is not largely obstructed by the partition 11. That is, an increase in pressure loss due to the provision of the partition portion 11 with respect to the flow of the cooling water hardly causes a problem.

(Second Embodiment) FIG. 5 is a plan view of the intermediate plate 3. This embodiment is an example in which a partition 11 is provided in the width direction of the intermediate plate 3 as shown in FIGS. In this case, both intermediate plates 3A, 3B
If the positions of the partition portions 11 coincide with each other, the cooling flow path is divided and it becomes impossible to flow the cooling water. Therefore, the positions of the respective partition portions 11 are shifted.

[Brief description of the drawings]

FIG. 1 is a plan view of an intermediate plate (first embodiment).

FIG. 2 is a plan view showing a state in which intermediate plates are superimposed (first embodiment).

FIG. 3 is a plan view of an outer plate.

FIG. 4 is a perspective view of a laminated cooler.

FIG. 5 is a plan view of an intermediate plate (second embodiment).

FIG. 6 is a plan view of an intermediate plate (prior art).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Multilayer cooler 2 Heat generating component 3 Intermediate plate 4 Outer plate 9 Slit 11 Partition part

Claims (3)

[Claims] 1. A heat-generating component comprising a plurality of intermediate plates having a plurality of slits laminated thereon, an outer plate superposed on both outer layers thereof, and a cooling liquid flowing through the slits and attached to the surface of the outer plate. A laminated cooler for cooling the intermediate plate, wherein the intermediate plate has a partition for regulating a length of the slit. 2. The stacked cooler according to claim 1, wherein the plurality of slits are formed obliquely in the intermediate plate in parallel with a substantially constant pitch. 3. The laminated cooler according to claim 1, wherein the partition portion of the intermediate plate is provided along a flow direction of a cooling liquid.