JP2022181052A - surface contact heat exchanger - Google Patents

Abstract

To reduce costs required for connection of heat exchange units, in a surface contact heat exchanger having a plurality of heat exchange units as constituents.SOLUTION: A plurality of first heat exchangers 4 having a heat transfer surface 1 on its outer periphery are connected to each other by one or a plurality of second heat exchangers 6. The heat exchangers 4, 6 are in communication with each other. A first heat medium 3 circulating between the heat exchangers 4, 6 communicating with each other is heat-exchanged in the second heat exchanger 6 by a second heat medium 5 supplied to the second heat exchanger 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a surface contact heat exchanger, which has a flat heat transfer surface on its outer surface, and heat exchange is performed by bringing the heat transfer surface and a heat exchange target such as a battery into contact, In particular, it relates to having a plurality of heat exchange units.

FIG. 5 shows an example of a conventional surface contact heat exchanger, and FIG. 5A is a block diagram of the first heat medium 3 and the second heat medium 5. In FIG.
Here, the heat exchange object 2 is placed on the surface of the flat heat transfer surface 1 of the first heat exchanger 18 .
A second heat exchanger 19 is arranged separately from the first heat exchanger 18, and a flow path for the first heat medium 3 is formed between the second heat exchanger 19 and the first heat exchanger 18. be. Furthermore, a flow path for the second heat medium 5 is formed between the second heat exchanger 19 and the radiator 20 .

In the surface contact heat exchanger having a plurality of heat exchange units as the first heat exchanger 18, dedicated connection parts are used to connect the heat exchange units, which increases the cost. .
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide the above surface contact heat exchanger capable of reducing its cost.

In the present invention according to claim 1, the heat transfer surface 1 is formed on the outer surface, the heat exchange object 2 contacts the heat transfer surface 1, and the first heat medium 3 flows and circulates inside. , a plurality of first heat exchangers 4 that exchange heat with the heat exchange object 2,
It is connected via one or a plurality of second heat exchangers 6, in which the second heat medium 5 is circulated and circulated, and the first heat medium 3 is circulated, Heat exchange is performed between both heat mediums 5 and 3,
It is a surface contact heat exchanger in which the first heat medium 3 is supplied from the first heat exchanger 4 on the upstream side to the first heat exchanger 4 on the downstream side via the second heat exchanger 6 .

The present invention according to claim 2 is the surface contact heat exchanger according to claim 1,
The first heat exchanger 4 is a battery cooler, and the second heat exchanger 6 is a chiller, which is a surface contact heat exchanger.

In the invention according to claim 1, the first heat exchanger 4 is connected via one or a plurality of second heat exchangers 6, and the second heat exchanger 6 heats between the two heat mediums 5 and 3. Exchange takes place and the first heat medium 3 is supplied from the first heat exchanger 4 on the upstream side to the first heat exchanger 4 on the downstream side.
As a result, it becomes possible to connect a plurality of first heat exchangers 4 without using dedicated connecting parts, so that the cost can be reduced accordingly.

According to the second aspect of the invention, the first heat exchanger 4 is a battery cooler, and the second heat exchanger 6 is a chiller.
As a result, the cost is reduced, and since the first heat medium 3 is cooled or heated by the second heat medium 5 in the chiller, the temperature change of the first heat medium 3 is suppressed, and each first heat exchanger The difference in temperature of the heat transfer surface 1 of 4 is reduced, and uneven cooling or heating of the battery is suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a surface contact heat exchanger according to a first embodiment of the present invention and an explanatory diagram showing temperature changes on the flow path of a first heat medium 3; The exploded perspective view which shows an example of the same heat exchanger. FIG. 3A is a perspective view showing an assembled state of the heat exchanger and a cross-sectional view taken along line BB of FIG. 3(A); FIG. 4 is a block diagram of a surface contact heat exchanger according to a second embodiment of the present invention and an explanatory diagram showing temperature changes on the flow path of the first heat medium 3; 1 is a block diagram of a conventional surface contact heat exchanger; FIG.

According to the present invention, as shown in the block diagram of each embodiment, a plurality of first heat exchangers 4 are arranged adjacent to each other, and one or more second heat exchangers are arranged between the first heat exchangers 4. 6 are connected.
A heat transfer surface 1 is formed on the outer surface of each first heat exchanger 4 , and a heat exchange object 2 is arranged on the heat transfer surface 1 .
The first heat medium 3 flows into the second heat exchanger 6 from the first heat exchanger 4 arranged on the upstream side.
The second heat medium 5 flows through the second heat exchanger 6 , and heat exchange takes place between the second heat medium 5 and the first heat medium 3 within the second heat exchanger 6 . The heat-exchanged first heat medium 3 is supplied from the second heat exchanger 6 to the first heat exchanger 4 on the downstream side.
By having the above configuration, it is possible to connect a plurality of first heat exchangers 4 without using dedicated connection parts, so the surface contact type heat exchange with the structure shown in FIG. 5 of the background art The cost is reduced as compared to the equipment.

In the surface contact heat exchanger shown in FIG. 5A of the background art, the first heat medium 3 such as cooling water flowing through the first heat exchanger 18 is used to heat the battery arranged on the heat transfer surface 1 . Cools the heat exchange object 2 such as. The first heat medium 3 is heat-exchanged with the second heat medium 5 in the second heat exchanger 19 , cooled, and returned to the first heat exchanger 18 .
In the first heat exchanger 18, the temperature rises by Δt as shown in FIG. 5(B) while the first heat medium 3 flows from the inlet side to the outlet side.
In the first heat exchanger 18 of FIG. 5 , when the first heat medium 3 absorbs heat from the heat exchange object 2 and radiates heat to the second heat exchanger 19, the width W of the first heat exchanger 18 is increased. , the temperature rise of the first heat medium 3 occurs in each part thereof, and the cooling of the heat exchange object 2 becomes uneven. Non-uniform cooling of the heat exchange object 2 can be eliminated.
A case of cooling the heat exchange object 2 will be described as an example for each embodiment based on the drawings.

1 to 3 show a first embodiment of the invention. FIG. 1A is a block diagram of the surface contact heat exchanger of the first embodiment, and FIG. . 2 and 3 show an example of the first embodiment. 2 is an exploded perspective view thereof, and FIG. 3 is a perspective view (A) showing its assembled state and a sectional view (B) taken along line BB of FIG. 3(A). The structures of the first heat exchanger 4 and the second heat exchanger 6 preferably employ the structures shown in FIGS. 2 and 3, but are not limited to these structures.

As an example, the first heat exchanger 4 is used as a battery cooler.
The first heat exchanger 4 is a surface contact heat exchanger having a dish-shaped lower plate 7 and an upper plate 8, as shown in FIG. In this example, the heat transfer surface 1 of the first heat exchanger 4 is formed on the outer surface of the upper plate 8, and as shown in FIG. . Between the inner surface of the upper plate 8 and the lower plate 7 , a flow path is formed through which the first heat medium 3 such as cooling water flows inside the first heat exchanger 4 .
The flow path can be made meandering by forming a plurality of partitions 13, as shown in FIG.

In this example, the second heat exchanger 6 is a chiller, preferably having a core formed by laminating dish-shaped plates as shown in FIG.
In the core of the second heat exchanger 6, channels through which the first heat medium 3 circulates and channels through which the second heat medium 5 such as a refrigerant circulates are alternately formed in every other stacked plate. It is
An upper end plate is arranged at the upper end of the core of the second heat exchanger 6, and a pair of pipes 9 are protruded from the upper end plate. The second heat medium 5 flows from one pipe 9 to the other pipe 9 . A hole communicating with the flow path of the first heat medium 3 of the first heat exchanger 4 is formed at the lower end of the core of the second heat exchanger 6 .

In this embodiment, two first heat exchangers 4 and two second heat exchangers 6 constitute a surface contact heat exchanger. Each first heat exchanger 4 is formed to have a width smaller than the width W of the surface contact heat exchanger of FIG.
The first second heat exchanger 6 is arranged at the inlet of the flow path of the first heat medium 3 of the first heat exchanger 4 on the upstream side. Between the outlet of the flow path of the first heat medium 3 of the first heat exchanger 4 on the upstream side and the inlet of the flow path of the first heat medium 3 of the first heat exchanger 4 on the downstream side, they are connected A second second heat exchanger 6 is arranged. The channels through which the first heat medium 3 of the heat exchangers 4 and 6 flow communicate with each other.

A circulation pipe 9 is projected from the first heat exchanger 4 on the upstream side, and a circulation pipe 9 is also projected from the outlet of the first heat exchanger on the downstream side.
As shown in FIG. 1, the pipe 9 on the outlet side of the first heat exchanger 4 on the downstream side communicates with the pipe 9 on the inlet side of the first heat exchanger 4 on the upstream side via a pump 10 and a heater 11. there is The pipe 9 on the inlet side communicates with the flow path of the first heat medium 3 of the first second heat exchanger 6 .

As shown in FIG. 1B, as the first heat medium 3 flows through the first heat exchanger 4 on the upstream side, it receives heat from the heat exchange object 2 and its temperature gradually rises. The first heat medium 3 whose temperature has risen flows from the first heat exchanger 4 on the upstream side into the second heat exchanger 6 and is cooled by the second heat medium 5 . The cooled first heat medium 3 is circulated to the first heat exchanger 4 on the downstream side, and the temperature gradually rises accordingly.
In this example, as shown in FIG. 1B, the width of each first heat exchanger 4 is half the width W of the first heat exchanger 18 in FIG. The difference in temperature at the outlet of the first heat medium 3 of the first heat exchanger 4 on the side approximately coincides with the difference in temperature (Δt/2) at the position half the width of the conventional first heat exchanger 18 do.
Before flowing from the first heat exchanger 4 on the upstream side to the first heat exchanger 4 on the downstream side, the By sufficiently cooling the first heat medium 3 with the first heat exchanger 4 on the downstream side, the heat exchange object 2 such as a battery arranged in the first heat exchanger 4 on the downstream side can also be cooled.
The first heat medium 3 that has flowed through the first heat exchanger 4 on the downstream side passes through the pump 10 and the heater 11 to the first second heat exchanger arranged in the first heat exchanger 4 on the upstream side. 6 and cooled.

Next, FIG. 4 shows a surface contact heat exchanger according to a second embodiment of the present invention. is a number.
In the figure, four first heat exchangers 4 are arranged in parallel, and the first heat exchangers 4 are connected by a second heat exchanger 6 . Then, the first heat medium 3 that has passed through each first heat exchanger 4 is returned via the pump 10 and the heater 11 and circulated. At this time, the temperature of the first heat medium 3 changes as shown in FIG. 4(B) every time it passes through each second heat exchanger 6 .
In this example, the width of each first heat exchanger 4 is 1/4 of the width of the conventional first heat exchanger 18, and the temperature difference in the first first heat exchanger 4 is It substantially coincides with the temperature difference Δt/4 at the 1/4 position of the width W of the first heat exchanger 18 of the mold.

As shown in the two embodiments above, a plurality of first heat exchangers 4 that are smaller than the conventional first heat exchangers 18 and one or more connections between the first heat exchangers 4 By forming a surface contact heat exchanger with the same capacity as the conventional first heat exchanger with the second heat exchanger 6, it is possible to simplify the connection parts and reduce the cost, and heat Non-uniform cooling of the replacement object 2 can be prevented.

INDUSTRIAL APPLICABILITY The present invention can be used as a heat exchanger such as a cooler for driving batteries of electric vehicles or hybrid vehicles.

1 Heat Transfer Surface 2 Heat Exchange Object 3 First Heat Medium 4 First Heat Exchanger 5 Second Heat Medium 6 Second Heat Exchanger 7 Lower Plate 8 Upper Plate 9 Pipe 10 Pump 11 Heater 12 Flange 13 Partition 14 U-turn path 18 first heat exchanger 19 second heat exchanger 20 radiator

Claims (2)

A heat transfer surface (1) is formed on each outer surface, a heat exchange object (2) is in contact with the heat transfer surface (1), a first heat medium (3) flows and circulates inside, and heat is A plurality of first heat exchangers (4) that exchange heat with an exchange object (2),
It is connected via one or more second heat exchangers (6), and the second heat medium (5) flows and circulates in the second heat exchangers (6), and the first heat medium (3) is circulated, heat exchange is performed between both heat mediums (5) and (3),
Surface contact type in which the first heat medium (3) is supplied from the upstream first heat exchanger (4) to the downstream first heat exchanger (4) via the second heat exchanger (6) Heat exchanger. In the surface contact heat exchanger according to claim 1,
A surface contact heat exchanger, wherein said first heat exchanger (4) is a battery cooler and said second heat exchanger (6) is a chiller.

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