JP7696756B2 - Surface contact heat exchanger - Google Patents

Description

The present invention relates to a surface-contact heat exchanger that has a flat heat transfer surface on its outer surface and exchanges heat by bringing the heat transfer surface into contact with a heat exchange object such as a battery, and in particular to a surface-contact heat exchanger that has a secondary heat exchange section.

Conventional surface-contact heat exchangers have a secondary heat exchanger, such as a chiller, located separately and the two heat exchangers are connected by piping.

Therefore, the conventional surface-contact heat exchanger has a complicated structure and a large number of components. In addition, piping is required, which also increases the number of components.
Furthermore, this method has the drawback of requiring piping connections, increasing the number of connections, and increasing the risk of leakage.

The present invention aims to provide a surface-contact heat exchanger with a secondary heat exchange section that has a small number of components, is easy to assemble, has a low risk of leakage, and is simply constructed.

The present invention described in claim 1 provides a first heat exchange section 4 having a heat transfer surface 1 formed on an outer surface thereof, a heat exchange object 2 contacting the heat transfer surface 1, a first heat medium 3 circulating inside thereof, and exchanging heat with the heat exchange object 2;
and one or more second heat exchange sections 6 that are integrally arranged on the outer installation surface 7 adjacent to the first heat exchange section 4, a second heat medium 5 circulates inside, and the first heat medium 3 and the second heat medium 5 exchange heat with each other via the installation surface 7.

The present invention as set forth in claim 2 provides the surface contact type heat exchanger as set forth in claim 1,
The heat exchanger is a surface-contact type heat exchanger having a heat transfer improving means 8 formed on the installation surface 7 .

The present invention as set forth in claim 3 provides the surface contact type heat exchanger as set forth in claim 2,
The heat transfer improving means 8 is a surface contact type heat exchanger that is formed as unevenness on the installation surface 7 .

The present invention according to claim 4 provides the surface contact type heat exchanger according to claim 3,
The heat transfer improving means 8 is a surface contact type heat exchanger having projections and recesses formed in a herringbone pattern.

The present invention as set forth in claim 5 provides the surface contact type heat exchanger as set forth in claim 1,
The second heat exchange section 6 on the installation surface 7 is a surface-contact heat exchanger having a plurality of stacked plates 9, in which the first heat medium 3 and the second heat medium 5 flow alternately between every other plate in the stacking direction.

The invention described in claim 1 is a heat exchanger including a first heat exchange section 4 through which a first heat medium 3 flows inside a heat transfer surface 1 with which a heat exchange object 2 comes into contact;
The heat exchanger further comprises a second heat exchange section 6 which is disposed integrally with an adjacent installation surface 7 and in which a second heat medium 5 circulates, and which exchanges heat between the two heat media.
As a result, the second heat exchange section 6 is formed integrally with the surface-contact type heat exchanger, and no piping is required to connect them, eliminating the need for piping components and piping work and the risk of leakage from the piping connections.
Furthermore, since a flow path for the first heat medium 3 inside the second heat exchange section 6 is also unnecessary, the structure of the secondary heat exchanger is simplified and the number of component parts can be reduced.
Furthermore, since the second heat exchange section 6 is integrated with a surface-contact type heat exchanger, the contact area between the outer surface of the second heat exchange section 6 and the outside air (e.g., the atmosphere) is reduced, and unnecessary heat transfer therebetween (e.g., in the case where the second heat exchange section 6 is a chiller, heat input from the atmosphere) is reduced.

In the invention described in claim 2, a heat transfer improving means 8 is further formed on the installation surface 7.
This allows sufficient heat exchange to be achieved even with a simple configuration.

The invention described in claim 3 further comprises heat transfer improving means 8 formed as unevenness on the installation surface 7, which makes it possible to easily mold the heat transfer improving means by press processing, etc.

The invention described in claim 4 further comprises heat transfer improving means 8 formed in a herringbone pattern, which makes it easy to obtain a high heat transfer improvement effect.

The invention described in claim 5 has a second heat exchange section 6 on the installation surface 7 that is made up of multiple stacked plates 9, and the first heat medium 3 and the second heat medium 5 flow alternately between every other plate in the stacking direction, thereby enabling efficient heat exchange between the two media.

FIG. 1 is an exploded perspective view of a surface-contact heat exchanger according to a first embodiment of the present invention. 2A is a perspective view showing the assembled state of the heat exchanger, and FIG. 2B is a cross-sectional view taken along the line B-B of FIG. 2A. FIG. 5 is an exploded perspective view of a surface-contact heat exchanger according to a second embodiment of the present invention. 4A is a perspective view showing the assembled state of the heat exchanger, and FIG. 4B is a cross-sectional view taken along the line BB of FIG. 4A.

Next, an example of cooling a heat exchange object 2 according to an embodiment of the present invention will be described with reference to the drawings.

1 and 2 show a surface-contact heat exchanger according to a first embodiment of the present invention, in which FIG. 1 is an exploded perspective view thereof, FIG. 2(A) is a perspective view showing the assembled state of the heat exchanger, and FIG. 2(B) is a cross-sectional view taken along the line B-B of FIG. 2(A).
This surface-contact heat exchanger comprises a first heat exchange section 4 consisting of a pair of plates and a second heat exchange section 6 integrally connected by brazing to an installation surface 7 provided at one end of the first heat exchange section 4. This heat exchanger has a lower plate 10 formed in a dish shape and an upper plate 11 connected to a flange portion of the lower plate 10.
In this example, the lower plate 10 and the upper plate 11 are formed in a rectangular shape, a flange portion 10a is provided on the outer periphery of the lower plate 10, a partition portion 10b is protruded from the longitudinal end of the lower plate 10, and a flow portion 10c is formed between the partition portion 10b and the outer periphery flange portion 10a.

A heat transfer improvement means 8, which is a herringbone-shaped irregularity, is provided at one end of the partition 10b, and a number of dimples 13 protrude from the inner surface of the lower plate 10 at the other end of the partition 10b. Furthermore, cooling water inlets and outlets 14 are drilled at the corners of both ends of the lower plate 10 in the longitudinal direction, to which pipes 12 are connected.

Next, the upper plate 11 forms a flat heat transfer surface 1 except for an installation surface 7 formed at one end in the longitudinal direction. The installation surface 7 at the end of the heat transfer surface 1 is provided with a heat transfer improving means 8 which is unevenly formed in a herringbone pattern. The lower plate 10 is provided with a heat transfer improving means 8 facing the upper plate 11, and the V-shaped waves of the heat transfer improving means 8 of both plates are in opposite directions. The second heat exchange section 6 is integrally brazed to the installation surface 7 of the upper plate 11. The surface of the second heat exchange section 6 is formed with a heat transfer improving means 8 which is unevenly formed in a herringbone pattern, and the V-shaped waves of the heat transfer improving means 8 and the heat transfer improving means 8 on the upper plate 11 are in opposite directions to each other.
A pair of refrigerant inlets and outlets 15 are formed on the upper surface of the second heat exchange section 6, and the pipes 12 are connected thereto.

These plates are brazed together to form a surface-contact heat exchanger in which the first heat exchange section 4 and the second heat exchange section 6 are integrated, as shown in FIG. 2. The heat exchange object 2 is brought into contact with the heat transfer surface 1 formed on the flat surface of the upper plate 11. In addition, engine coolant flows in as the first heat medium 3 from one side of a pair of pipes 12 provided on the lower surface side of the lower plate 10, and in FIG. 1, this flows into one end side of the partition section 10b from the coolant inlet/outlet 14, then is led to the flat side of the heat transfer surface 1, and is discharged to the outside from the other pipe 12, where it circulates.

In this example, air-conditioning refrigerant flows in as the second heat medium 5 from one pipe 12 of the second heat exchange section 6, flows between the heat transfer improving means 8, which is unevenness formed in a herringbone pattern on the surface of the heat transfer surface 1, and the heat transfer improving means 8 on the outer periphery of the second heat exchange section 6, and is then led to the outside. Then, heat exchange takes place between the second heat medium 5 and the first heat medium 3.
In this example, a battery cell assembly is used as the heat exchange object 2, but instead, an inverter or other electronic components can also be cooled.

Next, Figures 3 and 4 show a second embodiment of the surface-contact heat exchanger of the present invention. This heat exchanger has a stacked second heat exchange section 6, in which dish-shaped plates 9 are stacked, and the first heat medium 3 and the second heat medium 5 flow between every other plate 9, performing heat exchange between each plate 9.
In this example, a flange portion 10a is formed on the outer periphery of the lower plate 10 formed in a substantially rectangular shape, and a plurality of partition portions 10b are disposed in a serpentine shape integrally inside the flange portion 10a. The first heat medium 3 that has flowed through the flow path of the second heat exchanger 6 is led into both the upper and lower plates 11, 10 from the cooling water inlet/outlet 14 of the upper plate 11, then it is divided into left and right in the width direction of the lower plate 10, flows in a serpentine shape through the flow paths between the internal partition portions 10b, and is discharged to the outside.

Further, a cooling water inlet/outlet 14 is formed in the flange portion 10a of the lower plate 10, and a pair of cooling water inlets/outlets 14 are provided on both ends of the serpentine flow path.
As shown in FIG. 3, a heat transfer surface 1 is formed on the flat surface of the upper plate 11, and an object of heat exchange 2 is placed on and in contact with the heat transfer surface 1, as shown in FIG.
In this example, the heat exchange object 2 is a collection of battery cells.

In this example, engine cooling water as the first heat medium 3 flows in through a pipe 12 provided in the center as shown in FIG. 4(B), flows through every other second heat exchange section 6, and is then supplied to the inside of the lower plate 10, flows therethrough in a serpentine manner, and is discharged from a pair of pipes 12.
3, the second heat medium 5 flowing in from one end of the second heat exchange section 6 flows through every other plate 9 and flows out of the other refrigerant inlet/outlet 15, and exchanges heat between the second heat medium 5 and the first heat medium 3. In this example, engine coolant of a vehicle is used as the first heat medium 3, and heat exchange can be performed between it and the refrigerant of an air cooler as the second heat medium 5.

The present invention can be used as a heat exchanger, such as a cooler for the drive battery of an electric vehicle or hybrid vehicle.

REFERENCE SIGNS LIST 1 heat transfer surface 2 heat exchange object 3 first heat medium 4 first heat exchange section 5 second heat medium 6 second heat exchange section 7 installation surface 8 heat transfer improving means 9 plate 10 lower plate 10a flange section 10b partition section 10c flow section

11 Upper plate 12 Pipe 13 Dimple 14 Cooling water inlet/outlet 15 Refrigerant inlet/outlet

Claims (5)

a first heat exchange section (4) located on the opposite side of the heat transfer surface (1), in which a first heat medium (3) flows and circulates, and which exchanges heat with the heat exchange object (2);
one or more second heat exchange sections (6) that are integrally arranged on an installation surface (7) located on the same plane as the heat transfer surface (1) on the outer surface adjacent to the heat transfer surface (1), a second heat medium (5) circulates and flows inside, and the first heat medium (3) and the second heat medium (5) exchange heat with each other via the installation surface (7);
A surface contact type heat exchanger comprising: 2. The surface contact type heat exchanger according to claim 1,
A surface-contact heat exchanger having a heat transfer improving means (8) formed on the installation surface (7). 3. The surface contact type heat exchanger according to claim 2,
The heat transfer improving means (8) is an uneven surface formed on the installation surface (7) of the surface-contact heat exchanger. 4. The surface contact type heat exchanger according to claim 3,
The heat transfer improving means (8) of the surface-contact heat exchanger is a herringbone-shaped projection and recess. 2. The surface contact type heat exchanger according to claim 1,
The second heat exchange section (6) of the installation surface (7) has a plurality of stacked plates (9), and the first heat medium (3) and the second heat medium (5) flow alternately between every other plate in the stacking direction to form a surface-contact heat exchanger.

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