JP2002164491A - Stack cooler - Google Patents

Abstract

(57) [Problem] To provide a laminated cooler capable of effectively flowing cooling water to a mounting portion of a heating element requiring the most cooling. SOLUTION: An intermediate plate 3 is provided with a slit 9 forming a part of a cooling water passage. This slit 9
Are provided in parallel at a predetermined interval, and are formed obliquely with respect to the intermediate plate 3. However,
Since the bolt hole 8 is formed in the intermediate plate 3, a part of the slit 9 is divided by the bolt hole 8. On the other hand, the slit 9a that passes through the mounting range A of the heating element in an oblique direction extends to both ends without being divided by the bolt hole 8, and communicates with the header. This allows the cooling water to flow directly from one header to the slit 9a passing through the mounting range A of the heating element, and allows the cooling water to pass through the other header without being separated by the bolt hole 8. .

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 flowing a cooling medium 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 forced cooling using cooling water or the like because a built-in heating element generates a large amount of heat.
Therefore, the conventional inverter device has a structure generally as shown in FIG. That is, the fins 110 are formed in the case 100 by die casting, and the cooling passages 130 are formed in combination with the other cases 120. In this structure, since the cooling channel 130 needs to be formed by the two cases 100 and 120, the configuration of the entire apparatus becomes complicated. In addition, since the heat generating components 140 such as an inverter module and a converter are closely attached to the surfaces of the case 100 and the case 120, the surfaces of the cases 100 and 120 need to be ground.

On the other hand, as shown in FIG.
An inverter device using the stacked cooler 200 has been devised.
The multilayer cooler 200 is configured by stacking a plurality of plates, and has a cooling channel formed therein. An inverter device using the cooler 200 is constructed by assembling heat generating components 140 such as an inverter module and a converter on both surfaces of the cooler 200 to form an assembly, and assembling the assembly into cases 210 and 220. In this case, the configuration of the entire device can be simplified as compared with the inverter device shown in FIG. 5, and the cooler 200 has a sufficient flatness, so that surface grinding is not required.
As a result, a low-cost inverter device can be provided.

Incidentally, the cooler 200 is, for example, shown in FIG.
And two types of intermediate plates 230 as shown in (b) are alternately laminated, and an outer plate is superimposed on both outer layers, respectively, and a set of header openings respectively formed in the two types of intermediate plates 230 231 and the plurality of slits 232 communicate with each other to form a cooling channel.
In the cooler 200, a plurality of heat generating components 140 are fixed to the surface of the outer plate by bolts 240, and communicate with an external cooling water circuit through a pair of pipes 250 (see FIG. 6) communicating with the internal cooling flow path. Connected.

[0005]

However, in the intermediate plate 230, two bolt holes 233 for passing the bolt 240 are formed for one heat generating component 140. Here, one intermediate plate 2 shown in FIG.
30 is formed with a slit 232 along the flow direction of the cooling water (the vertical direction in FIG. 7A), so that the slit 232 has one header (the header openings 231 of both plates 230 are connected to each other). The cooling water flowing from (overlapping) can flow straight toward the other header as it is. However, since the slit 232a passing through the mounting position of the heating element (indicated by a broken line in the figure) is separated from the headers by the two bolt holes 233, the flow path resistance increases and the cooling water flows. It becomes difficult. As a result, the flow of the cooling water is deteriorated with respect to the mounting position of the heating element requiring the most cooling, and a problem arises that the heating element cannot be efficiently cooled.

In one intermediate plate 230, a slit 23 formed between two bolt holes 233 is formed.
The cooling water flows into the portion 2a through the slit 232 formed in the other intermediate plate 230, but the slit 232 formed in the other intermediate plate 230 does not directly communicate with the header. Can't shed. The present invention has been made based on the above circumstances, and an object of the present invention is to provide a laminated cooler capable of effectively flowing a cooling medium to a mounting portion of a heating element requiring the most cooling. is there.

[0007]

(Means for Solving the Problems) A cooling container in which a cooling channel is formed by laminating a plurality of intermediate plates having a plurality of slits and laminating outer plates on both outer layers. A heat-generating component having a heat-generating element built-in is attached to the surface of the outer plate, and the laminated cooler cools the heat-generating element by flowing a cooling medium through a cooling channel. When a region where the heating elements are arranged on the surface is projected onto the intermediate plate, a slit is formed to pass obliquely through the projected range. According to this configuration, since the cooling passage can be configured by the slit that passes in the oblique direction in the mounting range of the heating element, it is not necessary to provide a transverse slit orthogonal to the cooling passage in the intermediate plate. As a result, the flow of the cooling medium is not hindered by the lateral slit, and the pressure loss of the cooling container can be reduced.

According to a second aspect of the present invention, in the laminated cooler according to the first aspect, the cooling vessel has headers at both ends of the cooling flow path, respectively, within a mounting range of the heating element projected on the intermediate plate. Both ends of the slit formed through the hole directly communicate with the header. According to this configuration, since the cooling medium can flow directly from the header into the slit passing through the mounting range of the heating element projected on the intermediate plate, it is effective within the mounting range of the heating element requiring the most cooling. The cooling medium can be flowed through.

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 bolt hole through which a bolt for fixing a heat-generating component to the cooling vessel is passed, and the bolt hole is formed. , Are provided at positions that do not interfere with slits formed through the mounting range of the heating element projected on the intermediate plate. According to this configuration,
Since the slit passing through the mounting range of the heating element is not divided by the bolt hole, the cooling medium easily flows through the slit, and the heating element can be effectively cooled.

(Means of Claim 4) In any one of the stacked coolers described in Claims 1 to 3, the intermediate plate has two or more kinds of slit patterns different from each other, and a plurality of intermediate plates have different slit patterns. Intermediate plates are alternately stacked. According to this configuration, since a complicated flow path shape can be realized, a heat transfer area and a heat transfer coefficient are improved, and a cleaning cooler having high cooling performance can be provided.

[0011]

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.
FIG. 3 is a perspective view showing the overall shape of the laminated cooler. The laminated cooler 1 (hereinafter, abbreviated as the cooler 1) of the present embodiment distributes cooling water (cooling medium) through a cooling passage formed therein, and generates a heat-generating component 2 (for example, a driving motor of an electric vehicle. It cools the heating elements built in the inverter module to be controlled) and includes a plurality of intermediate plates 3 (3A, 3B) and 2
It is manufactured by laminating two outer plates 4 and assembling a set of pipes 5 and then integrally brazing.

A) As the intermediate plate 3, a brazing sheet having a brazing material layer on the surface of a metal plate (for example, an aluminum plate) having a certain thickness is used. The intermediate plate 3 is manufactured by pressing into two types shown in FIGS. 1A and 1B, and each of the intermediate plates 3 has a set of header openings 6.
(6a, 6b), a set of pipe mounting portions 7, a plurality of 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 (vertical direction in FIG. 1), and have a large rectangular opening in the width direction (horizontal direction in FIG. 1). However,
Header opening 6a provided on one intermediate plate 3A
Is formed to have a smaller width in the longitudinal direction (up and down width in FIG. 1) than the header opening 6b provided in the other intermediate plate 3B. The pipe mounting portions 7 are openings for mounting the pipes 5, are formed at the center portions of both ends in the longitudinal direction of the intermediate plate 3, and communicate with the header openings 6, respectively.

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. As shown in FIG. It is open. In this embodiment, as shown in FIG. 4, three heat-generating components 2 are attached to the cooler 1 side by side, and one heat-generating component 2 is fixed with two bolts 10.
A pair of two bolt holes 8 are formed in the intermediate plate 3 at equal intervals in the width direction of the intermediate plate 3.

The slits 9 are provided in parallel between the header openings 6 with a substantially constant pitch and a substantially same slit width, and are formed obliquely with respect to the intermediate plate 3. However, since the above-described bolt hole 8 is formed in the intermediate plate 3, a part of the slit 9 is divided by the bolt hole 8. On the other hand, the slit 9a passing obliquely through the area indicated by the broken line A in the drawing is the bolt hole 8
It is formed so as to extend to both ends without being divided. The area indicated by the broken line A in the figure is the heating component 2
3 shows a range in which the mounting positions of the heat generating elements built in are projected onto the intermediate plate 3.

As shown in FIG. 3, the two kinds of intermediate plates 3 are alternately stacked (the number of sheets may be any) such that the directions of the slits 9 are opposite to each other. Thereby, the slits 9 communicate with each other to form a cooling channel in a mesh shape, and the header openings 6a of the plates 3A, 3B,
6b overlap each other to form an inlet header 11 and an outlet header 12. In addition, since the header opening 6b of the other intermediate plate 3B and the end of the slit 9 of the one intermediate plate 3A communicate with each other, the inlet header 11 and the outlet header 12 communicate with each other via the cooling channel.

B) The outer plate 4 is formed by laminating a plurality of two types of intermediate plates 3 and superimposing on both outer layers, thereby closing the upper and lower surfaces of the cooler 1. The outer plate 4 has six bolt holes 8 as shown in FIG.
Is opened, the heat-generating component 2 is attached to the plate surface, and is fixed by the bolt 10. The broken line B in the figure
A region indicated by a circle indicates a mounting range of the heat-generating component 2 and is indicated by a broken line A.
The region indicated by indicates the position where the heating element is arranged. c) The pipes 5 connect an external cooling water circuit (not shown) to the cooler 1 and each have a pipe mounting portion 7.
And communicates with the entrance header 11 and the exit header 12.

Next, the operation and effect of this embodiment will be described. The cooling water supplied from the external cooling water circuit to the cooler 1 through one pipe 5 flows into the inlet header 11,
After flowing from the inlet header 11 through the cooling channel formed by the slit 9, the other pipe 5 passes through the outlet header 12.
Then, it is returned to the external cooling water circuit again. As a result, the heating element incorporated in the heating component 2 is cooled by the cooling water.

Here, in the cooler 1 of the present embodiment, a part of the slit 9 provided in the intermediate plate 3 is formed obliquely across the mounting range of the heating element projected on the intermediate plate 3. , Both ends are in communication with the header. This allows the cooling water to flow directly from one of the headers to the slit 9 a passing through the mounting range of the heating element, and is not divided by the bolt hole 8.
It is possible to exit to the other header as it is. As a result, the cooling water can be effectively flowed within the mounting range of the heating element that requires the most cooling, and the heating element can be efficiently cooled. In the above embodiment, two types of intermediate plates 3 are used, but one type of intermediate plate 3 may be used by rotating it by 180 degrees. Alternatively, three or more types of intermediate plates 3 having different slit patterns may be used.

[Brief description of the drawings]

FIG. 1 is a plan view of an intermediate plate.

FIG. 2 is a plan view of an outer plate.

FIG. 3 is a plan view showing a state where two types of intermediate plates are superimposed.

FIG. 4 is a perspective view of a cooler.

FIG. 5 is a sectional view of a conventional inverter device.

FIG. 6 is a cross-sectional view of an inverter device using a stacked cooler.

FIG. 7 is a plan view of an intermediate plate (conventional example).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooler (cooling container) 2 Heat generating component 3 Intermediate plate 4 Outer plate 8 Bolt hole 9 Slit 10 Bolt 11 Inlet header 12 Outlet header A Mounting range of the heating element projected on the intermediate plate

Claims (4)

[Claims] 1. A cooling container in which a plurality of intermediate plates having a plurality of slits are laminated and an outer plate is laminated on both outer layers to form a cooling passage therein, and a heating element is provided on a surface of the outer plate. A laminated cooling device having a heat-generating component mounted therein, and cooling the heat-generating element by flowing a cooling medium through the cooling flow path, wherein the intermediate plate has the heat-generating element on a surface of the outer plate. Wherein the slit is formed to extend obliquely through the projected area when the area where is disposed is projected onto the intermediate plate. 2. The laminated cooler according to claim 1, wherein the cooling vessel has headers at both ends of the cooling flow path, and the cooling vessel is provided within a mounting range of the heating element projected on the intermediate plate. A laminated cooler characterized in that both ends of the slit formed therethrough communicate directly with the header. 3. The laminated cooler according to claim 1, wherein the intermediate plate has a bolt hole through which a bolt for fixing the heat-generating component to the cooling vessel is passed, and the bolt hole is provided with the bolt hole. The laminated cooler is provided at a position where the slit does not interfere with the slit formed through a mounting range of the heating element projected on an intermediate plate. 4. The laminated cooler according to claim 1, wherein the intermediate plate has two or more types each having a different slit pattern, and a plurality of intermediate plates having different slit patterns are alternately arranged. A laminated cooler characterized in that the laminated cooler is laminated.