JP4306120B2 - 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 water channel therein, and cooling water is circulated through the cooling water channel to cool a heating element.
[0002]
[Prior art]
For example, an inverter device that requires a large current for a vehicle or the like requires a forced cooling using a cooling water or the like because the heat generation amount of the heating element is large. Therefore, as shown in FIG. 9, the present inventor has devised an inverter device A using a laminated cooler 100 in which a plurality of plates are laminated to form a cooling water channel therein.
The laminated cooler 100 is connected to an external cooling water circuit through a pair of pipes 130 in which a heat generating component 110 such as an inverter module or a smoothing converter is fixed by bolts 120 on the surface of an outer plate and communicates with an internal cooling water channel. The
[0003]
[Problems to be solved by the invention]
However, if a pair of pipes 130 are attached to both side surfaces of the cooler 100, respectively, the handling of the hose connected to the pipe 130 becomes complicated, which causes a deterioration in mountability to the vehicle.
Therefore, for example, as shown in FIG. 10, a partition plate 140 is provided inside the cooler 100 to form a left water channel and a right water channel, and the cooling water is U-turned from the left water channel to the right water channel. Since the set of pipes 130 can be attached to the same side of the vessel 100, the above problem can be solved.
[0004]
However, as shown in FIG. 10, in the structure in which the cooling water channel is simply U-turned, a large temperature distribution is generated on the left side and the right side on the surface of the cooler 100 (the mounting surface of the heat generating component 110). There is a problem that cooling cannot be expected.
The present invention has been made based on the above circumstances, and its object is to have a structure in which a cooling water channel is U-turned in a stacked cooler configured by stacking a plurality of plates, and a heat generating component is An object of the present invention is to provide a stacked cooler that can reduce the temperature distribution on the surface of a plate to be attached.
[0005]
[Means for Solving the Problems]
(Means of Claim 1)
Cooling container of the present invention, by interposing a partition plate between a plurality of intermediate plates cooled at, at Rukoto to U-turn cooling channels in its thickness direction, the upper and lower sides of the partition plate performance However, the inlet and outlet of the cooling channel are provided on the same side surface of the cooling vessel, and the inlet and outlet of the cooling channel are provided on the same side surface of the cooling vessel.
The intermediate plate is provided with a plurality of slits arranged in parallel at a substantially constant pitch,
The intermediate plate disposed on the upper side of the partition plate in the thickness direction of the cooling container and the intermediate plate disposed on the lower side of the partition plate are characterized in that the pitch between slits arranged in parallel or the width of the slits is different.
According to the above configuration, since a large temperature distribution does not occur on the same surface (on the surface of the outer plate) of the cooling container to which the heat generating component is attached, it is possible to ensure the cooling performance necessary for cooling the heat generating component. .
Further, by making the cooling channel U-turn in the thickness direction of the cooling container, it is possible to configure the cooling performance to be different between the upper side and the lower side of the partition plate.
Furthermore, the cooling performance can be made different between the upper side and the lower side of the partition plate by changing the pitch between slits provided in each intermediate plate or the width of the slits on the upper side and the lower side of the partition plate.
[0008]
(Means of Claim 2 )
The stacked cooler according to claim 1, wherein
The cooling container is characterized in that the number of intermediate plates disposed on the upper side of the partition plate and the number of intermediate plates disposed on the lower side of the partition plate are different in the thickness direction of the cooling container.
In this case, the cooling performance can be varied by changing the number of intermediate plates between the upper side and the lower side of the partition plate.
[0009]
(Means of claim 3 )
The stacked cooler according to claim 1 or 2 ,
The cooling container has a heating component with a built-in heating element with a large heating value on the surface of one outer plate, and a heating component with a heating element with a small heating value mounted on the surface of the other outer plate. It is characterized in that the cooling performance is higher on one outer plate side than the other outer plate side with respect to the plate.
[0010]
When a heat-generating component with a large amount of heat generation element and a heat generation component with a small heat generation amount are mounted in a single cooling container for cooling, the heat generation element with a large heat generation amount is generally cooled more. Performance is required. Therefore, if the cooling performance is different between the upper and lower sides of the partition plate, it is better to attach a heat-generating component that contains a heating element with a large amount of heat generation to the outer plate (one outer plate) with the higher cooling performance. Cooling can be performed efficiently.
[0011]
(Means of claim 4 )
The stacked cooler according to claim 3 , wherein
The cooling container is characterized in that the cooling medium is made to flow in from the higher cooling performance between the upper side and the lower side of the partition plate.
When a heat-generating component with a built-in heating element is installed on the outer plate with higher cooling performance, the opposite is the case when the cooling medium is introduced from the higher cooling performance (lower cooling performance) The cooling effect corresponding to each cooling performance can be obtained.
[0012]
(Means of claim 5 )
The stacked cooler according to claim 3 , wherein
The cooling container is configured to allow the cooling medium to flow in from the lower cooling performance between the upper side and the lower side of the partition plate.
Some heat generating elements need to be kept at a low temperature even if the amount of heat generated is small (for example, a smoothing capacitor, a photocoupler, etc.).
Therefore, when mounting a heat generating component with a built-in heat generating element having a small heat generation amount on the outer plate having a lower cooling performance, the heat generating element (the heat generation amount is smaller because the cooling medium is introduced from the lower cooling performance). Can be effectively cooled).
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
(Example)
FIG. 1 is a perspective view showing the overall shape of the laminated cooler 1.
The laminated cooler 1 (hereinafter abbreviated as “cooler 1”) of this embodiment allows cooling water to flow through a cooling water passage formed therein and is built in a heat generating component 2 (for example, an inverter module and a smoothing converter for an electric vehicle). A plurality of intermediate plates 3 (3A, 3B, 3C, 3D), one partition plate 4, and two outer plates 5 are laminated to form a set of pipes 6 After assembling (6A, 6B), it is manufactured by integral brazing.
[0014]
a) The intermediate plate 3 uses a brazing sheet having a brazing material layer on the surface of a metal plate (for example, an aluminum plate) having a certain thickness.
The intermediate plate 3 includes two types of intermediate plates 3A and 3B (see FIG. 2) that form cooling water channels on the upper side of the partition plate 4, and two types of intermediate plates 3C that form cooling water channels on the lower side of the partition plate 4. 3D (see FIG. 3), each manufactured by pressing.
[0015]
As shown in FIGS. 2 and 3, the intermediate plates 3A to 3D each have a pair of header openings 7 (7a, 7b, 7c, 7d), a pipe mounting portion 8 (8a, 8b), and a plurality of bolt holes. 9 and a plurality of slits 10 are provided.
The header openings 7 are provided on both sides of the intermediate plate 3 in the longitudinal direction (the vertical direction in FIGS. 2 and 3), and are opened in a large rectangular shape in the width direction (the horizontal direction in FIGS. 2 and 3). However, the header openings 7a and 7c provided in the intermediate plates 3A and 3C have a narrower width in the longitudinal direction (the vertical width in FIGS. 2 and 3) than the header openings 7b and 7d provided in the intermediate plates 3B and 3D. Is formed.
[0016]
The pipe attachment portion 8 is an opening for attaching the pipe 6, and is provided at one location on each intermediate plate 3 and communicates with one header opening 7. However, the pipe attachment portion 8a provided on the intermediate plates 3A and 3B and the pipe attachment portion 8b provided on the intermediate plates 3C and 3D are formed so as to have different positions in the width direction (see FIGS. 2 and 3). .
The bolt holes 9 are round holes through which bolts 11 (see FIG. 1) for fixing the heat generating component 2 to the cooler 1 are passed, and are opened at six locations between the header openings 7.
[0017]
A plurality of slits 10 are provided between the header openings 7 in parallel with a substantially constant pitch and substantially the same slit width, and are formed obliquely with respect to the intermediate plate 3.
As shown in FIGS. 4 and 5, the intermediate plates 3 </ b> A to 3 </ b> D have two types (3 </ b> A and 3 </ b> B, 3 </ b> C and 3 </ b> D) in which the header openings 7 are provided at the same position, They are stacked one on top of the other in the opposite direction (any number is acceptable). As a result, the slits 10 communicate with each other to form a cooling water channel in a mesh shape, and the header openings 7 of the intermediate plates 3A and 3B and the header openings 7 of the intermediate plates 3C and 3D overlap with each other. Is formed.
[0018]
In addition, in the intermediate plates 3A and 3B, the header opening 7b of the intermediate plate 3B and the end of the slit 10 provided in the intermediate plate 3A communicate with each other, whereby the header and the cooling water channel communicate with each other.
Similarly, in the intermediate plates 3C and 3D, the header opening 7d of the intermediate plate 3D communicates with the end of the slit 10 provided in the intermediate plate 3C, whereby the header and the cooling water channel communicate with each other.
[0019]
b) As shown in FIG. 6, the partition plate 4 has six bolt holes 9 and a header communication port 4a that opens in a rectangular shape. The header communication port 4a is formed only on one side in the longitudinal direction of the partition plate 4, and communicates one header formed by the intermediate plates 3A and 3B and one header formed by the intermediate plates 3C and 3D. Yes. Thereby, in the cooler 1, the upper cooling water channel formed by the intermediate plates 3A and 3B and the lower cooling water channel formed by the intermediate plates 3C and 3D are connected to the header communication port 4a of the partition plate 4. A U-shaped cooling water channel communicating therewith is formed.
[0020]
c) The outer plate 5 is formed by laminating the intermediate plate 3 and the partition plate 4 and overlapping the outer layers, thereby closing the upper and lower surfaces of the cooler 1. As shown in FIG. 7, six bolt holes 9 are opened in the outer plate 5, and the heat generating component 2 is attached to the plate surface and fixed by bolts 11 (see FIG. 1).
d) The pipe 6 connects an external cooling water circuit (not shown) and the cooler 1, and includes an inlet pipe 6A attached to one pipe attaching portion 8a and an outlet attached to the other pipe attaching portion 8b. It consists of a pipe 6B (see FIG. 1).
[0021]
Next, the operation and effect of the present embodiment will be described.
As shown in FIG. 8, the cooling water supplied from the external cooling water circuit to the inlet pipe 6A flows through the upper cooling water passage from the inlet pipe 6A through the header 12, and then passes through the header communication port 4a of the partition plate 4. After making a U-turn to the lower cooling water channel and flowing through the lower cooling water channel, it flows out of the outlet pipe 6B through the header 12 and returns to the external cooling water circuit again.
[0022]
According to this configuration, a large temperature distribution does not occur on the same surface of the cooler 1 to which the heat generating component 2 is mounted (on the surface of the outer plate 5), so that the cooling performance necessary for cooling the heat generating component 2 is achieved. Can be secured. Further, since the inlet pipe 6A and the outlet pipe 6B can be attached to the same side surface of the cooler 1, the hose (not shown) connected to the inlet pipe 6A and the outlet pipe 6B can be easily routed and can be mounted on a vehicle. Can be improved.
[0023]
Note that in an inverter device having an inverter module and a smoothing converter as the heat generating component 2, since the inverter module generally generates a larger amount of heat, higher cooling performance is required than the smoothing converter. Therefore, when cooling two types of heat generating components 2 having different heat generation amounts, it is better to allow the cooling water to flow in from the cooling water passage on the heat generating component 2 (the one with the larger heat generation amount) side that requires high cooling performance. In other words, in the above-described embodiment, both of the heat generating components 2 are attached to the upper outer plate 5 with the heat generating component 2 having a large heat generation amount and the lower outer plate 5 with the heat generating component 2 having a small heat generation amount. Can be efficiently cooled.
However, even if the heat generating component 2 is required to be cooled at a lower temperature even if the heat generation amount is small, the lower heat generating component 2 having the lower heat generation amount is attached to the lower outer plate 5 having a lower cooling performance. It is better to let the cooling water flow in from the cooling water channel.
[0024]
(Modification)
In the above embodiment, the slits of each intermediate plate 3 are provided at a substantially constant pitch. However, when two kinds of heat generating components 2 having different heat generation amounts are cooled as described above, the upper and lower sides of the partition plate 4 are arranged. The slit pitch or slit width may be changed between the sides. That is, in the intermediate plate 3 used on the side where the cooling performance is not required so much (the lower side of the partition plate 4 in this embodiment), the slit pitch is increased or the slit width is reduced to minimize the cooling performance. It may be lowered. In this case, since the pressure loss generated when the cooling water flows can be kept low, a sufficient flow rate can be obtained even with a small pump, and an energy saving and low cost system can be realized.
[0025]
Further, by changing the number of intermediate plates 3 above and below the partition plate 4, it is possible to make a difference between the upper cooling performance and the lower cooling performance. In other words, the number of intermediate plates 3 used on the side where the cooling performance is not required so much (the lower side of the partition plate 4 in this embodiment) may be reduced to reduce the cooling performance to the minimum necessary. In this case, the cooler 1 can be reduced in thickness and cost.
[0026]
Furthermore, in the above embodiment, two types of intermediate plates 3 are used on the upper side and the lower side of the partition plate 4, respectively, but one type of intermediate plate 3 may be rotated 180 degrees and used. 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 perspective view of a cooler.
FIG. 2 is a plan view of an intermediate plate.
FIG. 3 is a plan view of an intermediate plate.
FIG. 4 is a plan view showing a state in which two types of intermediate plates are overlaid.
FIG. 5 is a plan view showing a state in which two types of intermediate plates are overlaid.
FIG. 6 is a plan view of a partition plate.
FIG. 7 is a plan view of an outer plate.
FIG. 8 is a schematic view of a cooler showing a flow direction of cooling water.
FIG. 9 is a cross-sectional view of a conventional inverter device.
FIG. 10 is a schematic diagram of a cooler showing the flow direction of cooling water (prior art).
[Explanation of symbols]
1 Stacked cooler (cooling vessel)
2 Heating parts 3 Intermediate plate 4 Partition plate 5 Outer plate 6A Inlet pipe (inlet)
6B outlet pipe (exit)
10 slits

Claims (5)

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 cools the heating element by circulating a cooling medium through the cooling flow path,
The cooling vessel, said plurality by interposing a partition plate between the intermediate plate, the cooling channel to its thickness direction at Rukoto is U-turn, it cooled in the upper and lower sides of the partition plate The performance is different, and the inlet and outlet of the cooling channel are provided on the same side of the cooling vessel ,
The intermediate plate is provided with the plurality of slits arranged in parallel at a substantially constant pitch,
The intermediate plate disposed on the upper side of the partition plate in the thickness direction of the cooling container and the intermediate plate disposed on the lower side of the partition plate have a pitch between the slits in parallel or a width of the slit. Laminated cooler characterized by being different . The stacked cooler according to claim 1, wherein
The cooling container is characterized in that the number of the intermediate plates arranged on the upper side of the partition plate and the number of the intermediate plates arranged on the lower side of the partition plate are different from each other in the thickness direction of the cooling container. vessel. The stacked cooler according to claim 1 or 2 ,
The cooling container has a heat generating component with a large heat generation element built in on the surface of one outer plate, and a heat generating component with a small heat generation element built in on the surface of the other outer plate, and The laminated cooler, wherein the cooling performance is higher on the one outer plate side than the other outer plate side with respect to the partition plate. The stacked cooler according to claim 3 , wherein
The laminated cooler, wherein the cooling container is configured to allow a cooling medium to flow in from a higher cooling performance between an upper side and a lower side of the partition plate. The stacked cooler according to claim 3 , wherein
The above-mentioned cooling container is constituted so that a cooling medium may be made to flow in from the one where cooling performance is lower in the upper part and the lower part of the above-mentioned partition plate.

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