JP4314738B2 - Stacked cooler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stacked cooler in which a plurality of plates are stacked to form a cooling channel inside, and a cooling medium is circulated through the cooling channel to cool a heating element.
[0002]
[Prior art]
For example, an inverter device that requires a large current for vehicles or the like requires a forced cooling using cooling water or the like because the heat generation amount of a built-in heating element is large. Therefore, the conventional inverter device has a structure as shown in FIG. That is, the fin 110 is formed by die casting in the case 100 and the cooling flow path 130 is formed in combination with the other case 120. In this structure, it is necessary to form the cooling flow path 130 with the two cases 100 and 120, so that the configuration of the entire apparatus becomes complicated. In addition, since the heat generating components 140 such as the inverter module and the converter are attached in close contact with the surfaces of the case 100 and the case 120, the surfaces of the cases 100 and 120 have to be ground respectively.
[0003]
On the other hand, the inventor has devised an inverter device using a stacked cooler 200 as shown in FIG. The stacked cooler 200 is configured by stacking a plurality of plates, and a cooling flow path is formed therein. The inverter device using the cooler 200 is configured by assembling an assembly of heat generating parts 140 such as an inverter module and a converter on both surfaces of the cooler 200, and assembling the assembly into cases 210 and 220. In this case, as compared with the inverter device shown in FIG. 5 described above, the overall configuration of the device can be simplified, and the cooler 200 has sufficient flatness, so that surface grinding is not required. As a result, a low-cost inverter device can be provided.
[0004]
The cooler 200 is configured by alternately stacking two types of intermediate plates 230 as shown in FIGS. 7A and 7B, for example, and stacking outer plates on both outer layers, respectively. A pair of header openings 231 and a plurality of slits 232 formed in the plate 230 communicate with each other to form a cooling channel. In this cooler 200, a plurality of heat generating components 140 are fixed to the surface of the outer plate by bolts 240, and an external cooling water circuit is connected via a set of pipes 250 (see FIG. 6) leading to an internal cooling flow path. Connected.
[0005]
[Problems to be solved by the invention]
However, the intermediate plate 230 is formed with two bolt holes 233 for passing the bolts 240 for one heat generating component 140. Here, since one intermediate plate 230 shown in FIG. 7A has a slit 232 formed along the flow direction of the cooling water (vertical direction in FIG. 7A), the slit 232 includes The cooling water flowing from one header (formed by overlapping the header openings 231 of both plates 230) can flow straight toward the other header. However, the slit 232a passing through the mounting position of the heating element (shown by the broken line in the figure) is separated from both headers by the two bolt holes 233, so that the flow resistance increases and the cooling water flows. It becomes difficult. As a result, there is a problem that the circulation of the cooling water deteriorates with respect to the mounting position of the heat generating element that needs the most cooling, and the heat generating element cannot be efficiently cooled.
[0006]
In one intermediate plate 230, the cooling water flows into the slit 232 a formed between the two bolt holes 233 through the slit 232 formed in the other intermediate plate 230, but the other intermediate plate 230. Since the slits 232 formed in are not in direct communication with the header, the cooling water cannot flow effectively.
The present invention has been made on the basis of the above circumstances, and an object thereof is to provide a laminated cooler capable of effectively flowing a cooling medium to a mounting portion of a heat generating element that needs the most cooling. is there.
[0007]
[Means for Solving the Problems]
(Means of Claim 1)
A heating component having a cooling container in which a cooling flow path is formed by laminating a plurality of intermediate plates having a plurality of slits and by laminating outer plates on both outer layers and having a heating element built in the surface of the outer plate. A laminated cooler that is arranged and fixed to a cooling container by a bolt, and cools a heating element by circulating a cooling medium in a cooling flow path;
Intermediate plates are plane shape provided in a rectangle, the longitudinally position opposed with a predetermined distance, each with one of the bolt holes for the passage of the bolt and the other bolt holes are formed, and, A slit is formed in an oblique direction between one bolt hole and the other bolt hole .
According to this configuration, the cooling flow path can be configured by the slit that passes between the one bolt hole and the other bolt hole in the oblique direction. Therefore, a horizontal slit perpendicular to the cooling flow path is provided in the intermediate plate. There is no need. 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.
[0008]
(Means of Claim 2)
The stacked cooler according to claim 1, wherein
The cooling container has headers at both ends of the cooling flow path, and both ends of slits formed by passing between one bolt hole and the other bolt hole in an oblique direction directly communicate with the header. According to this configuration, it is possible to flow a direct cooling medium from the header to the slit formed missing Ri through diagonally between one bolt hole and the other bolt holes require most cooling heating The cooling medium can be effectively flowed within the mounting range of the element.
[0010]
(Means of claim 3 )
The stacked cooler according to claim 1 or 2 ,
The intermediate plate has two or more types having different slit patterns, and a plurality of intermediate plates having different slit patterns are alternately stacked.
According to this configuration, since a complicated flow path shape can be realized, a heat transfer area and a heat transfer rate can be improved, and a cleaning cooler with high cooling performance can be provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of the intermediate plate, and FIG. 4 is a perspective view showing the overall shape of the stacked cooler.
The laminated cooler 1 (hereinafter abbreviated as “cooler 1”) of the present embodiment distributes cooling water (cooling medium) through a cooling flow path formed therein, and generates a heat generating component 2 (for example, a motor for running an electric vehicle) After cooling a plurality of intermediate plates 3 (3A, 3B) and two outer plates 4 and assembling a set of pipes 5, the heater element incorporated in the inverter module to be controlled is cooled. , Manufactured by integral brazing.
[0012]
a) For the intermediate plate 3, a brazing sheet having a brazing filler metal layer on the surface of a metal plate (for example, an aluminum plate) having a certain thickness is used , and its planar shape is provided in a rectangular shape (see FIG. 1) .
The intermediate plate 3 is manufactured by press working in two types as shown in FIGS. 1A and 1B. Each of the intermediate plates 3 includes a set of header openings 6 (6a, 6b), a set of pipe attachment portions 7, and a plurality of intermediate plates 3. Bolt holes 8 and a plurality of slits 9 are provided.
[0013]
The header openings 6 are provided on both sides of the intermediate plate 3 in the longitudinal direction (vertical direction in FIG. 1), and are opened in a large rectangular shape in the width direction (horizontal direction in FIG. 1). However, the header opening 6a provided in one intermediate plate 3A is formed with a narrower width in the longitudinal direction (vertical width in FIG. 1) than the header opening 6b provided in the other intermediate plate 3B.
The pipe attachment portion 7 is an opening for attaching the pipe 5, is formed at the center of both ends in the longitudinal direction of the intermediate plate 3, and communicates with the header opening 6.
[0014]
The bolt holes 8 are round holes through which the bolts 10 (see FIG. 4) for fixing the heat generating component 2 to the cooler 1 are passed, and as shown in FIG. Yes. 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. In the plate 3, a set of two bolt holes 8 (one bolt hole 8 a and the other bolt hole 8 b) are opened at equal intervals in the width direction of the intermediate plate 3. Further, as shown in FIG. 1, the set of two bolt holes 8 (8a, 8b) are formed at positions facing each other with a predetermined interval in the longitudinal direction (vertical direction in the drawing) of the intermediate plate.
[0015]
The slits 9 are provided between the header openings 6 in parallel at a substantially constant pitch and substantially the same slit width, and are formed in an oblique direction with respect to the intermediate plate 3. However, since the bolt hole 8 is opened in the intermediate plate 3, a part of the slit 9 is divided by the bolt hole 8. On the other hand, the slit 9 a that passes through the region indicated by the broken line A in the drawing in an oblique direction extends to both ends without being divided by the bolt hole 8. In addition, the area | region shown with the broken line A in a figure shows the range which projected the attachment position of the heat generating element incorporated in the heat-emitting component 2 on the intermediate | middle plate 3. FIG.
[0016]
As shown in FIG. 3, the two types of intermediate plates 3 are alternately stacked (any number may be used) so 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 and 6b of both plates 3A and 3B overlap to form the inlet header 11 and the outlet header 12. . Further, 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, whereby the inlet header 11 and the outlet header 12 communicate with each other through the cooling channel.
[0017]
b) The outer plate 4 is formed by laminating a plurality of two kinds of intermediate plates 3 and overlapping the outer layers, thereby closing the upper and lower surfaces of the cooler 1. As shown in FIG. 2, six bolt holes 8 are formed in the outer plate 4, and the heat generating component 2 is attached to the plate surface and fixed by bolts 10. In addition, the area | region shown with the broken line B in a figure shows the attachment range of the heat-emitting component 2, and the area | region shown with the broken line A shows the position where the heat generating element is arrange | positioned.
c) The pipe 5 connects an external cooling water circuit (not shown) and the cooler 1, and is inserted into the pipe attachment portion 7 and communicates with the inlet header 11 and the outlet header 12.
[0018]
Next, the operation and effect of the present embodiment will be described.
The cooling water supplied from the external cooling water circuit to the cooler 1 through the one pipe 5 flows into the inlet header 11 and flows from the inlet header 11 through the cooling flow path formed by the slit 9, and then the outlet header 12. Then, the other pipe 5 is returned to the external cooling water circuit again. Thereby, the heat generating element incorporated in the heat generating component 2 is cooled by the cooling water.
[0019]
Here, in the cooler 1 of the present embodiment, a part of the slit 9 provided in the intermediate plate 3 is between the one bolt hole 8a and the other bolt hole 8b opened in the intermediate plate 3 (on the intermediate plate 3). (Within the mounting range of the heating element projected on the head ) is formed across the diagonal direction, and both ends communicate with the header. As a result, the cooling water can flow directly from the one header to the slit 9a passing through the mounting range of the heat generating element, and can be directly removed to the other header without being divided by the bolt hole 8. As a result, it is possible to effectively flow the cooling water within the mounting range of the heat generating element that needs the most cooling, and the heat generating 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 rotated 180 degrees. Alternatively, three or more kinds of intermediate plates 3 each having a different slit pattern 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 in which two types of intermediate plates are overlaid.
FIG. 4 is a perspective view of a cooler.
FIG. 5 is a cross-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]
1 Cooler (cooling container)
2 Heating parts 3 Intermediate plate 4 Outer plate 8 Bolt hole
8a One bolt hole
8b The other bolt hole 9 Slit 10 Bolt 11 Inlet header 12 Outlet header

Claims (3)

A heat generating component comprising a cooling container in which a cooling flow path is formed by laminating a plurality of intermediate plates having a plurality of slits and by laminating outer plates on both outer layers, and has a heating element built in the surface of the outer plate Is a laminated cooler that is fixed to the cooling vessel by a bolt and cools the heating element by circulating a cooling medium through the cooling flow path,
The intermediate plates are plane shape provided in a rectangle, a position facing a predetermined interval in the longitudinal direction, one bolt hole for passing the bolt respectively and the other bolt holes are formed, The laminated cooler is characterized in that the slit is formed so as to pass through in an oblique direction between the one bolt hole and the other bolt hole . The stacked cooler according to claim 1, wherein
The cooling container has headers at both ends of the cooling flow path, and both ends of the slit formed by passing through between the one bolt hole and the other bolt hole in an oblique direction directly to the header. A laminated cooler characterized by being connected. The stacked cooler according to claim 1 or 2 ,
The intermediate plate has two or more types having different slit patterns, and a plurality of intermediate plates having different slit patterns are alternately stacked.

Images