Surface contact type heat exchanger

Abstract

To provide a surface contact heat exchanger that improves heat transfer between a heat exchange object placed on the outer surface of a heat exchanger body and a fluid flowing inside the heat exchanger body.SOLUTION: In a surface contact heat exchanger, an inner fin 6 is arranged inside a flat heat exchanger body 5, and a side portion 9 of the inner fin 6 is made expandable and contractible within a certain range to improve surface contact between the heat exchange object 3 and a contact surface 4. The inner fin 6 has a corrugated shape, the side portions 9 are substantially parallel to each other and are inclined with respect to the two parallel planes 2. The outer periphery of the heat exchanger body 5 is formed with a bellows-shaped cross-sectional portion that can be expanded and contracted in the opposing direction of the two parallel surfaces 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a surface contact type heat exchanger that exchanges heat between a heat exchange object attached to the outer surface side and a fluid flowing through the inner surface side.

Background Art

[0002] A general surface contact type heat exchanger has substantially parallel opposing parallel surfaces on its inner side, and a flow path through which a fluid flows is formed between them. And between these parallel surfaces, mainly, In order to ensure pressure resistance against the internal pressure of the flow path, a fastening portion such as a protrusion or a rib is provided. In addition, a contact surface with a heat exchange object is formed on the outer surface side of the heat exchanger.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, especially when the contact surface is large, it is difficult to form a high flatness of the contact surface from the viewpoint of manufacturing accuracy, and there is a problem that sufficient surface contact with the heat exchange object cannot be ensured.

[0004] Therefore, an object of the present invention is to sufficiently ensure surface contact between the contact surface and the heat exchange object.

Means for Solving the Problems

[0005] The present invention according to claim 1 has substantially parallel opposing parallel surfaces 2 on the inner surface side, a contact surface 4 with a heat exchange object 3 is formed on at least one outer surface side thereof, and a heat exchanger body 5 through which a fluid 13 flows inside, and a fastening portion for fastening between the parallel surfaces 2. In a surface contact type heat exchanger comprising: As the fastening portion, an inner fin 6 is disposed between the parallel surfaces 2, The inner fin 6 is joined to the parallel surfaces 2, and a surface contact type heat exchanger characterized in that at least one of the parallel surfaces 2 has an elastic deformation structure capable of expanding and contracting in the opposing direction.

[0006] The invention according to claim 2 is the surface contact type heat exchanger according to claim 1, wherein the inner fin 6 is corrugated, its side surfaces 9 are substantially parallel to each other, and the surface contact type heat exchanger is characterized in that the side surfaces 9 are inclined obliquely with respect to the parallel planes 2.

[0007] The invention according to claim 3 is the surface contact type heat exchanger according to claim 1, wherein the inner fin 6 is corrugated, its side surfaces 9 are substantially parallel to each other, and the surface contact type heat exchanger is characterized in that a pair of fins having side surfaces 9 with an inclination opposite to that of the fins inclined obliquely with respect to the parallel planes 2 are laminated in the facing direction of the parallel planes 2 as a unit.

[0008] The invention according to claim 4 is the surface contact type heat exchanger according to claim 1, wherein the inner fin 6 is corrugated, has a bent portion or a curved portion on its side surface 9, and the surface contact type heat exchanger is characterized in that the ridge line of the bent portion or the curved portion extends substantially parallel to the parallel planes 2.

[0009] The invention according to claim 5 is the surface contact type heat exchanger according to any one of claims 1 to 4, wherein a bellows-shaped portion 10 having a cross section that can expand and contract in the facing direction is formed on the outer periphery of the heat exchanger body 5, and the surface contact type heat exchanger is characterized by this.

Advantages of the Invention

[0010] In the invention according to claim 1, since the contact surface 4 can elastically expand and contract in the facing direction of the parallel planes 2, due to the internal pressure by the fluid 13, the pressure mechanically applied to bring the heat exchange object 3 into surface contact with the contact surface 4, the pressure due to the self-weight of the heat exchange object 3, etc., the contact surface 4 can be displaced and deformed along the outer surface of the heat exchange object 3, and the surface contact between the contact surface 4 and the heat exchange object 3 is improved. In addition, when the parallel planes 2 are displaced and deformed in a direction away from each other due to the internal pressure of the fluid 13, the displacement and deformation are suppressed by the elastic limit, so excessive displacement and deformation are suppressed. Also, when the contact surface 4 is displaced and deformed along the outer surface of the heat exchange object 3 due to the pressure mechanically applied to bring the heat exchange object 3 into surface contact with the contact surface 4 or the pressure due to the self-weight of the heat exchange object 3, the displacement and deformation due to excessive pressure are suppressed by the reaction force against the elastic deformation. Also, the floating and separation of the contact surface 4 from the heat exchange object 3 are suppressed by the contact surface 4 being pressed against the heat exchange object by the reaction force.

[0011] In the invention according to claim 2, since the inner fin 6 is corrugated, its side surfaces 9 are substantially parallel to each other, and are inclined obliquely with respect to the parallel planes 2, an elastic force effective for improving surface contact is generated by changing the inclination angle of the side surfaces 9 of the inner fin 6 (the side surfaces 9 rising or falling). Also, when the inclination angle of the side surfaces 9 becomes a right angle, the displacement and deformation of the parallel planes 2 in a direction away from each other are restricted.

[0012] In the invention according to claim 3, the inner fin 6 is configured as a unit of a pair formed by laminating in the facing direction of the parallel planes 2 a fin having side surfaces 9 that are corrugated, substantially parallel to each other, and inclined obliquely with respect to the parallel planes 2 and a fin having side surfaces 9 with the opposite inclination. Therefore, an elastic force effective for improving surface contact is generated by changing the inclination angle of the side surfaces 9 of the inner fin 6. Also, when the inclination angle of the side surfaces 9 becomes a right angle, the displacement and deformation of the parallel planes 2 in a direction away from each other are restricted. Furthermore, in this configuration, even when the inner fin 6 expands and contracts in the facing direction of the parallel planes 2, the relative position in the lateral displacement direction of the parallel planes 2 hardly changes.

[0013] In the invention according to claim 4, the inner fin 6 is corrugated and has a bent portion or a curved portion on its side surface 9, and the ridge line of the bent portion or the curved portion extends substantially parallel to the parallel planes 2. Therefore, by changing the angle of the bent portion or the curvature of the curved portion of the side surface 9 of the inner fin 6, an elasticity effective for improving surface contact is generated. Further, when the bent portion or the curved portion of the side surface 9 of the inner fin 6 becomes flat, the displacement and deformation of the parallel planes 2 in the direction of separating from each other are restricted. Also, in the case of this configuration, even if the inner fin 6 expands and contracts in the facing direction of the parallel planes 2, the relative position in the lateral displacement direction of the parallel planes 2 hardly changes.

[0014] The invention according to claim 5 is such that, in addition to the configuration of any one of claims 1 to 4, a bellows-shaped portion 10 that can expand and contract in the facing direction is formed on the outer periphery of the heat exchanger body 5. Thereby, the expansion and contraction in the facing direction between the parallel planes 2 becomes easy, and the elastic expansion and contraction of the contact surface 4 also becomes easy.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0016] Next, embodiments of the present invention will be described with reference to the drawings. The surface contact type heat exchanger of the present invention is suitable as a cooler for cooling batteries, inverters, etc. used in electric vehicles, hybrid vehicles, etc., but can also be used as a heater for heating heat exchange objects.

Example

[0017] FIG. 1 is a schematic cross-sectional view of a main part of a surface contact type heat exchanger according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. The heat exchanger body 5 of this example has a plate formed in a dish shape and a plate for closing its opening. And a second surface 1b is formed on the inner surface side of the plate formed in a dish shape, and a first surface 1a is formed on the inner surface side of the plate for closing its opening. The first surface 1a and the second surface 1b face each other substantially in parallel, and they form a parallel two-plane 2. And a flow path through which the fluid 13 flows is formed between the parallel two-planes 2. Further, a contact surface 4 that is in surface contact with the outer surface of the heat exchange object 3 is formed on the outer surface side of at least one of the parallel two-planes 2. In addition, a pair of holes 12 are formed in the heat exchanger body 5, and pipes 11 are connected to these holes 12. Then, the fluid 13 flows into the heat exchanger body 5 from one pipe 11 and flows out from the other pipe 11.

[0018] An inner fin 6 is joined between the parallel two-planes 2 of the heat exchanger body 5 as a fastening part for fastening them. As shown in FIG. 1, the inner fin 6 is a rectangular corrugated fin composed of a top part 7, a bottom part 8, and side surface parts 9 connecting them. The inner fin 6 is arranged such that the ridge line of its top part 7 is substantially parallel to the flow direction of the fluid 13 (FIG. 2). In this example, as shown in FIG. 1, each top part 7 is joined to the first surface 1a, each bottom part 8 is joined to the second surface 1b, the side surface parts 9 are substantially parallel to each other, and are inclined obliquely with respect to the parallel two-planes 2. In this example, the side surface parts 9 are inclined to the right side of the paper surface, but the side surface parts 9 may be inclined to the left side of the paper surface. Here, when the inclination angle of the side surface portion 9 of the inner fin 6 changes (rises or falls), the contact surface 4 shown in FIG. 3 can elastically expand and contract in the facing direction H of the parallel planes 2. When the inclination angle of the side surface portion 9 of this inner fin 6 becomes a right angle, the displacement and deformation in the direction in which the parallel planes 2 move away from each other are restricted.

[0019] With this structure, due to the internal pressure by the fluid 13, the pressure mechanically applied to bring the heat exchange object 3 into surface contact with the contact surface 4, the pressure due to the self-weight of the heat exchange object 3, etc., the contact surface 4 can be displaced and deformed along the outer surface of the heat exchange object 3, and the surface contact between the contact surface 4 and the heat exchange object 3 is improved. As a result, sufficient heat transfer between the heat exchange object 3 and the fluid 13 is performed. In addition, when the parallel planes 2 are displaced and deformed in the direction in which they move away from each other due to the internal pressure of the fluid 13, the displacement and deformation are suppressed by the elastic limit, so excessive displacement and deformation are suppressed. Also, when the contact surface 4 is displaced and deformed along the outer surface of the heat exchange object 3 due to the pressure mechanically applied to bring the heat exchange object 3 into surface contact with the contact surface 4, or the pressure due to the self-weight of the heat exchange object 3, the displacement and deformation due to excessive pressure are suppressed by the reaction force against the elastic deformation. Also, the floating and separation of the contact surface 4 from the heat exchange object 3 are suppressed by the contact surface 4 being pressed against the heat exchange object by the reaction force.

Example

[0020] Next, FIG. 4 is a cross-sectional view of the main part of the heat exchanger according to the second embodiment of the present invention. In this example, a pair of upper and lower inner fins 6 are laminated in two stages. Both inner fins 6 are corrugated fins with a rectangular wave shape, but the inclination of the side surface portion 9 with respect to the parallel planes 2 of the upper inner fin 6 is formed in the opposite direction to the inclination of the side surface portion 9 with respect to the parallel planes 2 of the lower inner fin 6 (the upper and lower inner fins 6 are arranged symmetrically with respect to each other). The contact portions of the laminated inner fins 6 with each other are connected by brazing or the like. However, both ends in the periodic direction of the rectangular wave of each inner fin 6 are free ends. Similar to the first embodiment, when the inclination angle of the side surface portion 9 of the inner fin 6 changes (rises or falls), the contact surface 4 can elastically expand and contract in the direction facing the parallel planes 2. Further, when the inclination angle of the side surface portion 9 becomes a right angle, displacement and deformation in the direction in which the parallel planes 2 move away from each other are restricted. And even when the inner fin 6 expands and contracts in the direction facing the parallel planes 2, the relative position in the lateral displacement direction of the parallel planes 2 hardly changes. Note that although this second embodiment is constituted by a pair of upper and lower inner fins 6, it may be constituted by a plurality of pairs stacked with this as a unit.

Embodiment

[0021] Next, FIG. 5 is a cross-sectional view of a main part of a heat exchanger according to a third embodiment of the present invention. The inner fin 6 in this example is also a corrugated fin, but a bent portion is formed in the middle portion of the side surface portion 9 of the inner fin 6 in the direction facing the parallel planes 2. And the ridge line of the bent portion extends substantially parallel to the parallel planes 2. In this example, when the angle of the bent portion of the side surface portion 9 of the inner fin 6 changes, the contact surface 4 can elastically expand and contract in the direction facing the parallel planes 2. Further, when the bent portion of the side surface portion 9 of the inner fin 6 becomes flat, displacement and deformation in the direction in which the parallel planes 2 move away from each other are restricted. And similar to the second embodiment, even when the inner fin 6 expands and contracts in the direction facing the parallel planes 2, the relative position in the lateral displacement direction of the parallel planes 2 hardly changes. Note that in this example, a bent portion that is convex to the left side of the paper surface is formed in the side surface portion 9, but this bent portion may be formed convex to the right side of the paper surface. Also, it is not necessary for the bending directions of the bent portions of all the side surface portions 9 to be the same. For example, a shape in which one side of the side surface portion 9 facing one wave of the inner fin 6 is bent convex to the left side of the paper surface and the other side is bent convex to the right side of the paper surface may be used. Note that the number of times of bending of the side surface portion 9 is not limited to one in this embodiment, and may be two or more.

[0022] Instead of the bent portion of the third embodiment, a curved portion may be formed on the side surface portion 9. The ridge line of the curved portion extends substantially parallel to the parallel planes 2, similar to the third embodiment. When the curvature of the curved portion of the side surface portion 9 of the inner fin 6 changes, the contact surface 4 can elastically expand and contract in the opposing direction of the parallel planes 2.

Embodiment

[0023] Next, FIG. 6 shows a heat exchanger according to a fourth embodiment of the present invention. The difference between this example and the previous embodiments is that a bellows portion 10 is formed on the entire outer periphery of the heat exchanger body 5. That is, a peripheral edge portion having a bellows-shaped cross section is formed on the outer periphery of the plate on the lower surface side constituting the heat exchanger body 5. As a result, the expansion and contraction of the outer periphery become easy, so that the expansion and contraction in the opposing direction between the parallel planes 2 become easy, and the elastic expansion and contraction of the contact surface 4 also become easy. Note that the bellows portion 10 is not limited to the shape shown in FIG. 6, and may be a bellows portion 10 as shown in FIG. 7.

Industrial Applicability

[0024] The present invention can be used as a surface contact type heat exchanger such as a flat plate type battery cooler.

Explanation of Signs

[0025] 1a First surface 1b Second surface 2 Parallel planes 3 Object to be heat-exchanged 4 Contact surface 5 Heat exchanger body 6 Inner fin 7 Top 8 Bottom 9 Side surface portion 10 Bellows portion 11 Pipe 12 Hole 13 Fluid H Opposing direction

Claims

【Claim 1】 A surface contact type heat exchanger comprising a heat exchanger body (5) having substantially parallel opposing parallel planes (2) on the inner surface side, a contact surface (4) with a heat exchange object (3) formed on at least one outer surface side thereof, and a fluid (13) flowing inside, and a fastening portion for fastening between the parallel planes (2). As the fastening portion, an inner fin (6) which is a rectangular corrugated fin composed of a top portion (7), a bottom portion (8), and side portions (9) connecting them is disposed between the parallel planes (2). At least one of the parallel planes (2) has an elastic deformation structure that can expand and contract in the opposing direction. The elastic deformation structure is configured by taking a pair of inner fins (6) having side portions (9) that are substantially parallel to each other and inclined obliquely with respect to the parallel planes (2), and inner fins (6) having side portions (9) with the opposite inclination, and laminating them symmetrically with respect to the opposing direction of the parallel planes (2). The inner fins (6) located at both ends in the laminated direction are joined to the parallel planes (2). Both ends in the periodic direction of the rectangular wave of the pair of laminated inner fins (6) are free ends. A surface contact type heat exchanger characterized by the above.

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