JP2021103055A - Heat exchanger and manufacturing method for the same - Google Patents

Abstract

To provide a heat exchanger that can be manufactured efficiently and easily.SOLUTION: This invention relates to a heat exchanger including: an outer covering body 1 having an inlet/outlet 16; and an inner fin 2 provided between a pair of opposing walls in the outer covering body 1. The outer covering body 1 comprises an outer covering laminate material L1 in which a thermal fusion layer 52 is provided on an inner surface of a heat transfer layer 51, and the inner fin 2 comprises an inner core laminate material L2 in which thermal fusion layers 62 are provided on both surfaces of a heat transfer layer 61. Protruded and recessed parts 25, 26 of the inner fin 2 and the pair of opposing walls of the outer covering body 1 are joined and integrated. Resin reservoirs 4 made of resin of the respective thermal fusion layers 52, 62 are formed in joined parts between the protruded and recessed parts 25, 25 of the inner fin 2 and the pair of opposing walls. Due to the resin reservoirs 4, the pair of opposing walls are partially swollen outwardly so as to form resin reservoir swollen parts 41.SELECTED DRAWING: Figure 2

Description

The present invention relates to a heat exchanger manufactured by using a laminating material such as a laminating sheet in which a resin heat fusion layer is laminated on a metal heat transfer layer, and a method for manufacturing the same.

With the increasing size and performance of electronic devices such as smartphones and personal computers, it is important to take measures against heat generation around the CPU of the electronic devices. Depending on the model, a water-cooled cooler or heat pipe may be incorporated to load the heat on the electronic components such as the CPU. There have been conventionally proposed techniques for avoiding the adverse effects of heat by preventing heat from being trapped inside the housing.

In addition, the battery module mounted on an electric vehicle or a hybrid vehicle repeatedly charges and discharges, so that the battery pack generates a large amount of heat. For this reason, a technique has been proposed in which a water-cooled cooler and a heat pipe are incorporated in the battery module as in the case of the above-mentioned electronic device to avoid adverse effects due to heat.

Further, measures such as assembling a cooling plate or a heat sink for a power module made of silicon carbide (SiC) or the like have been proposed as a measure against heat generation.

By the way, in electronic devices such as the above-mentioned smartphones and personal computers, the housing is thin, and many electronic components and coolers are incorporated in the limited space in the thin housing, so the cooler itself is also thin. Will be.

Conventionally, a thin cooler such as a heat pipe incorporated in a small electronic device generally brazes or diffuses a plurality of metal processed parts obtained by processing a metal having high heat conductivity such as aluminum. It is manufactured by joining with (Patent Documents 1 to 3 and the like).

Japanese Unexamined Patent Publication No. 2015-59693 JP 2015-141002 Japanese Unexamined Patent Publication No. 2016-189415

However, in the above-mentioned conventional cooler for small electronic devices, each component is manufactured by plastic working such as casting and forging, and metal processing (machining) such as removal processing such as cutting. Since metal processing is troublesome and has strict restrictions, there is a limit to thinning, and there is a problem that it is difficult to make the metal thinner than the current one.

In addition, conventional coolers for small electronic devices are difficult to manufacture because they need to be manufactured using metal processing (metal-to-metal joining) such as brazing and diffusion bonding, which are difficult to join when joining each component. Not only that, there was a problem that production efficiency decreased and costs increased.

Furthermore, conventional coolers are manufactured using restricted metal processing, so the shape and size cannot be easily changed, the degree of freedom in design is limited, and versatility is lacking. There are also challenges.

The present invention has been made in view of the above problems, and can be sufficiently thinned, has a high degree of freedom in design, is excellent in versatility, and can be efficiently and easily manufactured to reduce costs. It is an object of the present invention to provide a heat exchanger that can be used and a method for manufacturing the same.

In order to solve the above problems, the present invention provides the following means.

[1] An outer capsule having an inlet and an outlet and having a pair of facing walls, and an inner fin provided between the pair of facing walls in the outer capsule and having an uneven portion, and flowing in from the inlet. A heat exchanger in which the heat exchange medium is allowed to flow out from the outlet through the inner fin installation portion in the outer capsule.
The outer capsule is made of an outer capsule laminate material provided with a resin heat-sealing layer on the inner surface side of the metal heat transfer layer.
The inner fin is made of an inner core laminate material in which heat fusion layers are provided on both sides of a metal heat transfer layer.
The heat-sealing layer on the bottom surface of the concave portion and the top surface of the convex portion of the inner fin and the heat-sealing layer on the pair of facing walls are joined and integrated.
A resin pool made of the resin of each heat-sealing layer is formed at the joint between the bottom surface of the concave portion and the top surface of the convex portion of the inner fin and the pair of facing walls.
A heat exchanger characterized in that a part of the pair of facing walls bulges outward due to the resin pool to form a resin pool bulging portion.

[2] The heat exchanger according to item 1 above, wherein the inner fin is arranged in a compressed state in a direction in which the fin height becomes lower.

[3] The inner fin is provided with concave portions and convex portions alternately and continuously, and the bottom surface of the concave portion and the top surface of the convex portion are formed in a flat angular wave shape.
The heat exchanger according to item 1 or 2 above, wherein the resin pool is formed in the central portion of the bottom surface of the concave portion and the central portion of the top surface of the convex portion.

[4] The heat exchanger according to any one of items 1 to 3 above, wherein the heat-sealing layer of the outer package and the heat-sealing layer of the inner fin are formed of the same type of resin.

[5] The outer capsule is composed of a tray member in which a recessed portion for accommodating the inner fin is formed in an intermediate region, and a cover member arranged so as to close the recessed portion of the tray member. The heat exchanger according to any one of the preceding items 1 to 4.

[6] The heat exchanger according to any one of items 1 to 4 above, wherein the external capsule is composed of a pair of sheet-shaped external capsule base materials arranged so as to be overlapped with each other via the inner fins.

[7] A pair of external capsule base materials made of an outer packaging laminate material provided with a resin heat-sealing layer on the inner surface side of the metal heat transfer layer are prepared, and both sides of the metal heat transfer layer are prepared. A component preparation process for preparing an inner fin that is composed of an inner core laminate material provided with a heat-sealing layer made of resin on the side and has an uneven portion.
In a state where the inner fins are arranged between the pair of outer peripheral base materials, the heat-sealing layers of the outer peripheral edges of the pair of outer peripheral base materials are heat-sealed to join and integrate with each other, while the outer peripheral edges thereof. The pair of outer shell base materials to which the portions are heat-sealed are used as an outer package, and the intermediate regions between the pair of outer shell base materials are used as a pair of facing walls, and the bottom surface of the recess and the top surface of the convex portion of the inner fin It includes a fusion step of heat-sealing the heat-sealing layer and the heat-sealing layer of the pair of corresponding walls to join and integrate them.
The fin height Hf of the inner fin in the component preparation step before the fusion step is set to be larger than the distance Sc of the pair of facing walls in the outer body after the fusion step. A method for manufacturing a heat exchanger.

[8] The method for manufacturing a heat exchanger according to item 7, wherein the height Hf of the uneven portion of the inner fin is set to 101% to 110% when the distance Sc between the pair of facing walls is 100%.

[9] The resin flowing out from each of the heat-sealing layers in the fusion step is allowed to flow into the joint portion between the bottom surface of the concave portion and the top surface of the convex portion of the inner fin and the pair of facing walls to form a resin pool. The method for manufacturing a heat exchanger according to item 7 or 8 above.

[10] The method for manufacturing a heat exchanger according to item 9, wherein the heat-sealing layer corresponding to the periphery of the resin pool is thinly formed by the outflow of the resin.

[11] In the fin fusion step, a pair of molds provided with a heat transfer rubber layer on the inner surface are heated with the pair of outer capsule base materials sandwiched between the heat transfer rubber layers to heat the mold. The method for manufacturing a heat exchanger according to any one of items 7 to 10 above, wherein the heat exchanger is fused.

[12] Among the fusion steps, a step of fusing the outer peripheral edges of the pair of external capsule base materials to each other is defined as an external capsule fusion step, and a step of fusing the inner fins to the pair of facing walls is performed. As a fin fusion process
The method for manufacturing a heat exchanger according to any one of items 7 to 11 above, wherein the fin fusion step is performed after the external capsule fusion step is performed.

[13] Among the fusion steps, a step of fusing the outer peripheral edges of the pair of external capsule base materials to each other is defined as an external capsule fusion step, and a step of fusing the inner fins to the pair of facing walls is performed. As a fin fusion process
The method for manufacturing a heat exchanger according to any one of items 7 to 11 above, wherein the external capsule fusion step and the fin fusion step are performed by the same heat treatment step.

According to the heat exchangers of the inventions [1] and [2], since a resin pool is formed at the contact portion between the outer packaging body and the uneven portion of the inner fin, heat is generated in the gap between the outer packaging body and the uneven portion of the inner fin. It is possible to prevent the exchange medium from invading, and it is possible to reliably prevent defects due to the intrusion, for example, defects such as the inner fins peeling off from the external capsule. Further, since the heat exchanger of the present invention is manufactured by heat-sealing a laminate material or a resin molded product, it is not necessary to use troublesome metal processing, and it can be manufactured efficiently and easily, and the cost can be reduced. At the same time, it is possible to reduce the thickness sufficiently. Further, in the heat exchanger of the present invention, since the shape and size of the laminating material as the outer body and the inner fin can be easily changed, the degree of freedom in design can be increased and the versatility can be improved.

According to the heat exchanger of the present invention [3], since the inner fin is formed in a square wave shape, a sufficient contact area of the inner fin with respect to the outer body can be secured, the heat exchange efficiency can be improved, and the inner fin can be used. The adhesive strength to the outer package can be improved, and the occurrence of poor contact can be prevented. Further, since the rising wall between the concave bottom wall and the convex top wall of the inner fin is arranged parallel to the thickness direction of the outer capsule, sufficient pressure resistance against stress that compresses the outer capsule in the thickness direction is sufficient. Has sex. Therefore, for example, when a plurality of heat exchangers and heat exchange target members are alternately stacked and arranged, even if they are compressed in the stacking direction, they can be prevented from being inadvertently deformed and sufficient heat exchange performance can be obtained. be able to.

According to the heat exchanger of the invention [4], the inner fin and the outer package can be joined with sufficient adhesive strength.

According to the heat exchangers of the inventions [5] and [6], the above effects can be obtained more reliably.

According to the method for manufacturing the heat exchanger of the inventions [7] to [10], one of the processes for manufacturing the heat exchanger of the invention [1] is specified. Therefore, the invention [1] The heat exchanger can be reliably manufactured.

According to the method for manufacturing a heat exchanger according to the inventions [11] and [12], the pair of facing walls of the outer package and the uneven portion of the inner fin can be heated while being in contact with each other, so that the heat fusion treatment can be performed with high accuracy. It can be performed.

According to the method for manufacturing a heat exchanger according to the invention [13], since the two heat fusion treatments are performed at the same time, the production efficiency can be improved.

FIG. 1 is a perspective view showing a heat exchanger according to the first embodiment of the present invention. 2A and 2B are views showing the heat exchanger of the first embodiment, where FIG. 2A is a plan view and FIG. 2B is a side sectional view corresponding to a cross section taken along line BB in FIG. c) is a front sectional view corresponding to the CC line cross section of FIG. (A). FIG. 3 is a perspective view showing the heat exchanger of the first embodiment in an exploded manner. FIG. 4 is a front sectional view for explaining the relationship between the outer package and the inner fin applied to the heat exchanger of the first embodiment. FIG. 5 is a front sectional view for explaining the inner fin of the first embodiment. FIG. 6 is a view corresponding to an enlarged cross section of a part of FIG. 2A, and is a front cross-sectional view showing an exaggerated characteristic portion of the heat exchanger of the first embodiment. 7A and 7B are views showing a heat exchanger according to a second embodiment of the present invention, in which FIG. 7A is a plan view and FIG. 7B is a side cross section corresponding to a cross section taken along line BB in FIG. FIG. 6C is a front sectional view corresponding to the cross section taken along the line CC of FIG. FIG. 8 is an enlarged cross-sectional view showing a part of FIG. 7 (c). FIG. 9 is a perspective view showing an inner fin applied to the heat exchanger of the second embodiment. FIG. 10 is a view corresponding to an enlarged cross-sectional view of a part of FIG. 7, and is a front cross-sectional view showing an exaggerated characteristic portion of the heat exchanger of the second embodiment.

<First Embodiment>
1 to 3 are views showing a heat exchanger according to the first embodiment of the present invention. In the following description, in order to facilitate understanding of the invention, the horizontal direction of FIG. 2 (a) is described as the "front-back direction", and the vertical direction of FIG. 2 (b) is referred to as the "vertical direction (thickness direction)". It is explained as.

As shown in FIGS. 1 to 3, the heat exchanger of the first embodiment is used as a heat transfer panel, a heat transfer tube, or the like, and has an outer package 1 as a casing (container) and an outer package 1 as a casing (container). It is provided with an inner fin (inner core material) 2 housed inside the outer body 1 and a pair (both sides) of headers (joint members) 3 and 3 housed in both ends of the outer casing 1.

The outer capsule 1 is composed of a tray member 10 having a rectangular shape in a plan view and a cover member 15 having a rectangular shape in a plan view.

The tray member 10 is composed of a molded product of the outer packaging laminate material L1, and the entire intermediate region excluding the outer peripheral edge portion is recessed downward by a method of deep drawing molding or cold molding such as extrusion molding. A rectangular concave portion 11 in a plan view is formed, and a flange portion 12 projecting outward is integrally formed on the outer periphery of the opening edge portion of the concave portion 11.

Further, the cover member 15 is formed with a pair of entrances 16 and 16 corresponding to both front and rear ends of the recessed portion 11 in the tray member 10. Needless to say, in the present embodiment, of the pair of entrances and exits 16, one entrance / exit 16 is configured as an entrance and the other entrance / exit 16 is configured as an exit.

The tray member 10 and the cover member 15 are composed of the outer capsule laminating material L1, which is a laminating sheet having flexibility and flexibility.

As shown in FIG. 4, the outer packaging laminate material L1 is a heat transferable resin laminated on a heat transfer layer 51 made of metal (metal foil) and one surface (inner surface) of the heat transfer layer 51 via an adhesive. A heat-resistant resin film or heat-resistant resin sheet laminated on the other surface (outer surface) of the heat-sealing layer 52 and the heat-transfer layer 51 via an adhesive. It includes a protective layer 53. In the present embodiment, the term "foil" is used to include a film, a thin plate, and a sheet.

As the heat transfer layer 51 in the outer packaging laminate L1, a copper foil, an aluminum foil, a stainless steel foil, a nickel foil, a nickel-plated copper foil, a clad metal composed of nickel and a copper foil, or the like can be preferably used. In the present embodiment, the terms "copper", "aluminum", "nickel", and "titanium" are used in the sense of including their alloys.

The heat transfer layer 51 is also referred to as a heat collecting layer, and it is preferable to use a heat transfer layer 51 having a thickness of 8 μm to 300 μm, and more preferably a heat transfer layer 51 having a thickness of 100 μm or less.

Further, by subjecting the heat transfer layer 51 to a surface treatment such as a chemical conversion treatment, it is possible to further improve the durability of the heat transfer layer 51, such as preventing corrosion of the heat transfer layer 51 and improving the adhesiveness with the resin.

For the chemical conversion treatment, for example, the following processing is performed. That is, the surface of the metal leaf that has been degreased is coated with an aqueous solution of any one of the following 1) to 3) and then dried to perform a chemical conversion treatment.

1) An aqueous solution of a mixture containing phosphoric acid, chromic acid, and at least one compound selected from the group consisting of a metal salt of fluoride and a non-metal salt of fluoride.

2) At least one resin selected from the group consisting of phosphoric acid, an acrylic resin, a chitosan derivative resin and a phenolic resin, and at least one compound selected from the group consisting of chromic acid and a chromium (III) salt. An aqueous solution of a mixture containing,.

3) At least one resin selected from the group consisting of phosphoric acid, acrylic resin, chitosan derivative resin and phenolic resin, and at least one compound selected from the group consisting of chromic acid and chromium (III) salt. An aqueous solution of a mixture containing at least one compound selected from the group consisting of a metal salt of fluoride and a non-metal salt of fluoride.

The chemical conversion coating, chromium add-on amount is preferably set to 0.1mg ^{/ m 2} ~50mg ^/ m 2 as a (per one surface), and still more preferably, to set particular to ^{2mg / m 2 ~20mg / m 2} .

As the heat-sealing layer 52, a film or sheet made of a polyolefin resin such as polyethylene or polypropylene or a modified resin thereof, a fluorine resin, a polyester resin, a vinyl chloride resin or the like can be preferably used. Of these, it is particularly preferable to use a film or sheet made of linear low density polyethylene (LLDPE).

As the heat-sealing layer 52, one having a thickness of 20 μm to 5000 μm is preferable, and more preferably one having a thickness of 30 μm to 80 μm is used.

Further, as the protective layer 53, a film or sheet made of a heat-resistant resin such as a polyester resin (PET) or a polyamide resin (ONY) can be preferably used.

Further, as the protective layer 53, a layer having a thickness of 6 μm to 100 μm is preferable.

Further, as an adhesive for adhering between each of the heat transfer layer 51, the heat fusion layer 52 and the protective layer 53 constituting the outer packaging laminate L1, a urethane adhesive having a thickness of 1 μm to 5 μm and an epoxy adhesive , Olefin adhesives and the like can be preferably used.

In the present embodiment, a sheet having a three-layer structure is used as the laminating material L1 constituting the outer body 1, but the present invention is not limited to this, and a sheet having a structure of four or more layers is used in the present invention. You can do it. For example, another layer is interposed between the protective layer and the heat transfer layer, or another layer is interposed between the heat transfer layer and the heat transfer layer, and a sheet having a structure of four or more layers is adopted. You may try to do it.

The outer packaging laminate material L1 having the above configuration constitutes the tray member 10 and the cover member 15 of the outer packaging body 1. Then, as will be described in detail later, the outer capsule 1 is formed by attaching the cover member 15 to the tray member 10 so as to close the opening of the recessed portion 11.

In the present embodiment, the tray member 10 and the cover member 15 form a pair of external capsule base materials. Further, the bottom wall (lower wall) 111 of the recessed portion 11 in the tray member 10 and the top wall (upper wall) 151 of the portion corresponding to the recessed portion 11 in the cover member 15 attached to the tray member 10 oppose a pair. The wall is constructed.

As shown in FIGS. 1 to 4, the inner fin 2 housed in the hollow portion (recessed portion) 11 of the outer capsule 1 is composed of an inner core laminating material L2 which is a flexible or flexible laminating sheet. ing.

As shown in FIG. 4, the inner core laminating material L2 is a heat transfer layer 61 made of metal foil and a heat fusion layer 62 made of a resin film or a resin sheet laminated on both sides of the heat transfer layer 61 via an adhesive. , 62 and.

As the heat transfer layer 61 in the inner core laminated material L2, copper foil, aluminum foil, stainless steel foil, nickel foil, nickel-plated copper foil, clad metal composed of nickel and copper foil, or the like can be preferably used.

The heat transfer layer 61 preferably has a thickness of 8 μm to 300 μm, and more preferably 100 μm or less.

As the heat-sealing layer 62, a film or sheet made of a polyolefin resin such as polyethylene or polypropylene or a modified resin thereof, a fluorine resin, a polyester resin, a vinyl chloride resin or the like can be preferably used. Of these, it is particularly preferable to use a film or sheet made of linear low density polyethylene (LLDPE).

As the heat-sealing layer 62, one having a thickness of 20 μm to 5000 μm is preferable, and more preferably one having a thickness of 30 μm to 80 μm is used.

Further, as an adhesive for adhering between the heat transfer layer 61 and the heat fusion layer 62 constituting the inner core laminating material L2, a urethane-based adhesive having a thickness of 1 μm to 5 μm is similar to the outer packaging laminating material L1. , Epoxy-based adhesives, olefin-based adhesives and the like can be preferably used.

In the present embodiment, a sheet having a three-layer structure is used as the laminating material L2 constituting the inner fin 2, but the present invention is not limited to this, and a sheet having a structure of four or more layers is used in the present invention. You can do it. For example, a sheet having a structure of four or more layers may be adopted by interposing another layer between the heat fusion layer and the heat transfer layer.

Further, as the processing method of the inner fin 2, in addition to cutting processing, injection molding, sheet molding (vacuum forming, compressed air forming, etc.), corrugating processing and embossing processing can be used. Needless to say, the processing method of the inner fin 2 is not limited.

As shown in FIGS. 2 to 5, the inner fin 2 is formed in a corrugated shape in which concave portions 25 and convex portions 26 are alternately and continuously formed, and the concave bottom surface (bottom wall) and the convex portion top surface (top wall) are formed. ) Is formed flat, and the rising wall between the adjacent concave bottom wall and the convex top wall is formed vertically in a square wave shape (rectangular wave shape), that is, a so-called digital signal waveform. Further, the inner fins 2 are arranged at equal pitches when the distance from the center line of the concave portion 25 to the center line of the convex portion 26 in the adjacent concave-convex portions 25 and 26 is the fin pitch (half pitch) Pf. In other words, the width dimension of the concave bottom wall (width dimension in the left-right direction toward the paper surface of FIG. 5) W11 and the width dimension W12 of the convex top wall are set to be equal.

In the present embodiment, the fin pitch Pf is preferably set to 1 mm to 5 mm. That is, if the fin pitch Pf is too narrow, processing becomes difficult and the pressure loss of the heat exchange medium also increases, which is not preferable. On the contrary, if the fin pitch Pf is too wide, it is easily deformed by the external pressure, which may lead to a decrease in pressure resistance, which is not preferable.

The inner fin 2 is housed in the recess 11 of the tray member 10. In this case, the inner fin 2 is housed in the intermediate portion of the tray member 10 excluding the front and rear ends of the recessed portion 11. Further, the inner fin 2 is arranged so that the mountain streak direction and the valley streak direction coincide with the front-rear direction (left-right direction in FIG. 1) of the tray member 10. As a result, the tunnel portion and the groove portion formed by the mountain streaks and the valley streaks of the inner fin 2 are configured as the heat exchange flow path. A plurality of the heat exchange flow paths are arranged along the front-rear direction (length direction) of the tray member 10 and in parallel in the width direction (left-right direction), and each heat exchange medium (heat exchange medium) is arranged in parallel. It is configured so that the outer package 1 can smoothly flow from one end side to the other end side in the front-rear direction while being evenly dispersed through the heat exchange flow path.

As will be described in detail later, the fin height Hf of the inner fin 2 at the component manufacturing stage before the heat exchanger assembly is between the upper and lower walls 111 and 151 of the design outer capsule 1 after the heat exchanger assembly is completed. It is formed larger than the interval (hollow portion height) Sc.

On the other hand, as shown in FIGS. 2 and 3, the pair of headers 3 and 3 arranged at both ends of the external capsule 1 are made of a molded product of synthetic resin.

As the resin constituting the header 3, it is preferable to use a resin of the same type as the resin constituting the heat-sealing layers 52 and 62 of the outer capsule 1 and the inner fin 2. Specifically, polyolefin resins such as polyethylene and polypropylene, modified resins thereof, fluororesins, polyester resins, vinyl chloride resins and the like can be preferably used.

The header 3 includes a box-shaped mounting box portion 31 having an opening 32 on one side surface, and a pipe portion 33 provided on the upper wall of the mounting box portion 31. The pipe portion 33 communicates with the inside of the mounting box portion 31, and is configured so that the heat exchange medium can come and go between the inside of the pipe portion 33 and the inside of the mounting box portion 31.

The mounting box portions 31 of the header 3 are arranged on both sides of the inner fins 2 in the recessed portions 11 of the tray member 10. Further, the pipe portion 33 of the header 3 is arranged upward, and the opening 32 of the mounting box portion 31 is arranged inward, that is, facing the inner fin 2.

In this way, the headers 3 and 3 are housed in the tray member 10, and the cover member 15 is arranged in the tray member 10 so as to close the opening thereof. In this case, the upward pipe portions 33, 33 of the headers 3 and 3 are inserted and arranged in the doorway 16 of the cover member 15.

In the heat exchanger temporarily assembled in this way, as described above, the fin height Hf of the inner fin 2 at the time of manufacturing the fin before assembly is the distance between the upper and lower walls 111 and 151 of the outer package 1 after the assembly is completed. (Hollow portion height) Since it is larger than Sc, the intermediate region of the cover member 15 is arranged so as to be pushed up by the inner fin 2 and bulge upward.

Then, by heating this heat exchanger temporary assembly product, the members in contact with each other are heat-sealed and joined and integrated.

First, the overlapping portion between the flange portion 12 of the tray member 10 and the outer peripheral edge portion of the cover member 15 in the outer packaging body 1 is heated while being sandwiched by a pair of upper and lower heating seal molds (the outer packaging body fusion step). As a result, the heat-sealing layers 52 between the flange portion 12 of the tray member 10 and the outer peripheral edge portion of the cover member 15 are heat-sealed (heat-bonded), and the hollow portion of the outer packaging body 1 is in an airtight or liquid-tight state. Seal in.

Subsequently, the intermediate region (lower wall 111 and upper wall 151) of the outer packaging body 1 in which the outer peripheral edge portion is heat-welded is heated while being sandwiched between a pair of upper and lower heating plates. As a result, the heat-sealing layer 62 at the peak and valley bottoms of the inner fin 2 and the heat-sealing layer 52 at the intermediate region (upper wall) 151 of the bottom wall 111 of the tray member 10 and the cover member 15 are thermally bonded ( It is joined and integrated by heat fusion) and sealed in a liquid-tight or airtight state (fin fusion step). Further, in this fin fusion step, the outer peripheral surfaces of the mounting box portions 31 and 31 of the headers 3 and 3 and the heat fusion layer 52 of the tray member 10 and the cover member 15 corresponding thereto are heat-sealed (heat-bonded). It is joined and integrated with each other and sealed in a liquidtight or airtight state.

The heat exchanger assembled in this way is arranged so that the pipe portions 33, 33 of the headers 3 and 3 project upward from the upper walls (cover members 15) at both ends of the outer capsule 1.

Here, when the heat-sealed portions of the inner fins 2, headers 3 and 3, and the outer packaging body 1 are made of the same type of resin, both can be reliably fixed with sufficient mounting strength.

In the present embodiment, by performing the heat fusion treatment (heat treatment) under reduced pressure, the inner fin 2 between the tray member 10 and the cover member 15 and the tray member 10 and the cover member 15 in contact with them. And the heat adhesion between the headers 3 and 3 can be strongly performed. Therefore, it is preferable to carry out the heat fusion treatment under reduced pressure.

In the present embodiment, the heating temperature (welding temperature) during the heat welding treatment is preferably set to 140 ° C. to 250 ° C., more preferably 160 ° C. to 200 ° C. Further, the pressure at the time of heat welding (welding pressure) is preferably set to 0.1 MPa to 0.5 MPa, more preferably 0.15 MPa to 0.4 MPa. Further, the welding time (welding time) is preferably set to 2 to 10 seconds, more preferably 3 to 7 seconds.

Further, in the present embodiment, the outer casing fusion step of heat-sealing the flange portion 12 of the tray member 10 and the outer peripheral edge portion of the cover member 15 and the inner fins 2, the headers 3 and 3, and the outer casing 1 are provided. The heat-sealing fin fusion step is performed by separate heat treatments, but the present invention is not limited to this. In the present invention, the outer body fusion step and the fin fusion step are performed by the same heat treatment. Is also good.

Further, in the present embodiment, in the fusion step, particularly in the fin fusion step, a heat transfer rubber layer is provided on the contact surface with the outer package 1 in the pair of heating plates sandwiching the lower wall 111 and the upper wall 151 of the outer package 1. By arranging them, the lower wall 111 and the upper wall 151 of the outer capsule 1 can be surely brought into contact with the lower surface of the concave portion and the upper surface of the convex portion of the inner fin 2, and the heat fusion treatment is performed with high accuracy. be able to.

In the above heat exchanger of the present embodiment, the fin height Hf of the inner fin 2 in the fin forming step before performing the fusion step such as the outer enclosure fusion step and the fin fusion step performs the fusion step. Since the heat exchanger is formed to be larger than the space (hollow portion height) Sc between the upper and lower walls of the outer package 1 after completion of the heat exchanger, the fin height Hf of the inner fin 2 is formed in the fin fusion step. It is heat-sealed in a compressed state by being pressurized in the vertical direction so that When heat fusion is performed in the pressure-compressed state in this way, as shown in FIG. 6, each portion (wall portion) of the inner fin 2 is deformed so as to be curved, and the outer enclosure 1 and the inner fin 2 are deformed. The resin of the heat-sealing layers 52 and 62 melts and flows into the convex portion top surface of the inner fin 2 and the upper and lower walls 111 and 151 of the outer body 1, so that the resin pool 4 is formed between them. At the same time, the molten resin of the heat-sealing layers 52 and 62 flows into and stays at the upper and lower positions of the contact portion between the rising wall of the inner fin 2 and the outer casing 1, and the resin pool 4 is also formed at that position.

When the resin pool 4 is formed in this way, it is lifted by the resin pool 4 and a part of the outer packaging body 1 bulges outward to form the resin pool bulging portion 41.

The heat-sealing layers 52 and 62 around the resin reservoir 4 are formed thin by the outflow of the resin into the resin reservoir 4.

As described above, in the heat exchanger of the present embodiment, the inner fin 2 is compressed and deformed in the height direction, and the resin is accumulated in the contact portion (joint portion) between the outer packaging body 1 and the uneven portions 25 and 26 of the inner fin 2. 4 is formed, and a liquid pool bulging portion 41 is formed in the outer packaging body 1 corresponding to the resin pool 4.

The heat exchanger having the above configuration is used as a cooler (cooling device) for cooling a battery or the like as a cooling target member (heat exchange target member). That is, an inflow pipe for inflowing a cooling liquid (cooling water, antifreeze liquid, etc.) as a heat exchange medium (coolant) is connected to one pipe portion 33 of the heat exchanger, and cooling is performed to the other pipe portion 33. An outflow pipe for draining the liquid is connected. Further, the battery as a cooling target member is placed in contact with the lower wall 111 and / or the upper wall 151 of the outer package 1 of the heat exchanger. Then, in that state, the cooling liquid flows from one pipe portion 33 into the inside of the outer casing 1 through the one header 3, the cooling liquid is circulated through the inner fin 2 portion, and the cooling liquid is circulated through the other header 3. It flows out from the other pipe portion 33. By circulating the cooling liquid to the outer packaging body 1 in this way, heat is exchanged between the cooling liquid and the battery via the inner fins 2 and the upper and lower walls of the outer packaging body 1, and the battery is cooled.

The form of use of the heat exchanger of the present embodiment is not particularly limited, and the heat exchanger may be used alone or in combination of two or more. As described above, the single use is to bring the heat exchange target member into contact with the upper and lower surfaces of the heat exchanger. When two are used, for example, the heat exchange target member can be arranged so as to be sandwiched between two heat exchangers. Further, when two or more are used, the heat exchanger and the heat exchange target member may be arranged so as to be alternately overlapped with each other.

As described above, according to the heat exchanger of the first embodiment, since the resin pool 4 is formed at the contact portion between the outer packaging body 1 and the uneven portions 25 and 26 of the inner fin 2, the outer packaging body 1 and the inner It is possible to prevent the heat exchange medium (refrigerant) from infiltrating into the gaps between the uneven portions 25 and 26 of the fins 2, and problems due to the infiltration. It is possible to reliably prevent problems such as deterioration of heat exchange performance.

Further, in the present embodiment, since the resin pool bulging portion 41 is formed on the outer surface of the heat exchanger, it is easy to form the resin pool 4 by visually recognizing the bulging portion 41 from the outside. Can be grasped. Therefore, it can be easily determined from the appearance whether or not the resin pool 4 is surely formed, and the convenience can be improved.

Here, in the present embodiment, in order to form the resin pool 4 in an accurate and stable state, the fin height Hf of the inner fin 2 at the time of manufacturing the parts before assembly is set to the upper and lower walls of the outer capsule 1 after completion. It is set larger than the interval Sc. Specifically, it is preferable to set the fin height Hf at the time of manufacturing the parts to 1.01 times to 1.10 times with respect to the vertical wall spacing Sc of the outer capsule 1 after completion. In other words, when the distance between the upper and lower walls Sc of the outer capsule 1 after completion is 100%, it is preferable to set the fin height Hf at the time of manufacturing the parts to 101% to 110%.

Further, in the heat exchanger of the present embodiment, since the inner fin 2 is formed in a square wave shape, a sufficient contact area with the outer packaging body 1 can be secured, and the member to be cooled that comes into contact with the outer surface of the outer packaging body 1 The heat exchange efficiency between the two can be improved, and high heat exchange performance can be obtained. Further, since a large adhesive area between the inner fin 2 and the outer packaging body 1 can be secured, the mounting strength of the inner fin 2 to the outer packaging body 1 can be improved, and the occurrence of poor contact can be reliably prevented.

Further, in the heat exchanger of the present embodiment, since the positions of the inner fins 2 can be regulated by the headers 3 and 3, the inner fins 2 do not sway or flutter due to the circulation of the heat exchange medium. , It is possible to prevent the heat exchange medium from staying due to the movement. Therefore, the fluidity of the heat exchange medium can be improved, and the heat exchange performance can be further improved.

Further, according to the heat exchanger of the present embodiment, since the tray member 10, the cover member 15, the inner fin 2 and the header 3 as the constituent members are manufactured based on the synthetic resin, each constituent member is appropriately heat-sealed. You can easily make it just by doing it. Therefore, the heat exchanger of the present embodiment aims to reduce costs and improve productivity as compared with a conventional metal heat exchanger manufactured by a difficult and troublesome joining process such as brazing. be able to.

Further, the heat exchanger of the present embodiment can further improve production efficiency and reduce costs, unlike the case of using troublesome and restrictive metal processing such as plastic working and cutting of metal.

Further, since the heat exchanger of the present embodiment is formed by laminating the tray member 10 and the cover member 15 made of a thin laminate sheet (laminate material) L1, sufficient thinning and weight reduction are ensured. be able to.

Further, according to the heat exchanger of the present embodiment, the inner fins 2 are arranged inside the outer packaging body 1 to secure a space for refrigerant flow (heat exchange flow path) inside the outer packaging body 1. High strength can be ensured against both internal pressure and external pressure, and operation reliability can be improved.

Further, in the heat exchanger of the present embodiment, since the outer package 1 is the laminate material L1, the shape and size of the heat exchanger itself can be easily changed, and as described above, the thickness, strength, heat exchange performance, etc. Can be easily changed, so that the configuration can be easily finished to an appropriate configuration according to the heat exchanger mounting position, etc., the degree of freedom in design can be increased, and the versatility can be improved.

<Second Embodiment>
FIG. 7 is a diagram showing a heat exchanger according to a second embodiment of the present invention, FIG. 8 is a cross-sectional view showing a part of FIG. 7 (c) in an enlarged manner, and FIG. 9 is a heat exchanger according to the second embodiment. It is a perspective view which shows the applied inner fin 2. As shown in these figures, this heat exchanger includes a bag-shaped outer capsule 1 and inner fins 2 arranged inside the outer capsule 1, and entrances and exits 16 are provided at the front and rear ends of the outer capsule 1. , 16 are provided.

The outer packaging body 1 is composed of the outer capsule laminating material L1 having a three-layer structure similar to that of the first embodiment. Then, in the outer packaging body 1 of the present embodiment, as will be described later, a pair (two sheets) of sheet-shaped outer packaging laminate material (external capsule base material) L1 formed in a rectangular shape are superposed on the upper and lower sides, and the outer peripheral edge portion thereof is formed. The heat-sealing layers 52 are joined and integrated by heat-sealing (heat sealing) to form a bag shape.

Further, joint pipes 33 and 33 are provided at the entrances and exits 16 and 16 in the external capsule 1. In the present embodiment, the joint pipes 33, 33 are made of, for example, a synthetic resin molded product similar to the header 3 of the first embodiment.

The joint pipes 33, 33 are arranged so as to be sandwiched between the front end portions and the rear end portions of the two outer capsule laminating materials L1 constituting the outer packaging body 1, and the outer peripheral surfaces (heat) of the respective joint pipes 33, 33 are arranged. The fusion layer) is joined and integrated with the heat fusion layer 52 of the corresponding outer capsule laminate material L1 by heat fusion. As a result, the joint pipes 33, 33 are fixed to the outer packaging body 1 in a state of penetrating the front end portion and the rear end portion of the outer packaging body 1 at the positions of the entrances 16 and 16 of the outer packaging body 1. In this state, the entire outer peripheral surface of the joint pipes 33, 33 and the heat-sealing layer 52 of the outer packaging laminate L1 are sealed by heat-sealing. Further, one end side of each of the joint pipes 33, 33 is arranged outside the outer packaging body 1, and the other end side is arranged inside the outer packaging body 1, so that the refrigerant as a heat exchange medium is applied to one of the joint pipes 33. It can be introduced into the outer package 1 via the outer body 1, and the refrigerant inside the outer package 1 can be led out to the outside through the other joint pipe 33.

The inner fin 2 is made of an inner core laminate material L2 having a three-layer structure similar to that of the first embodiment.

In the present embodiment, the inner fin 2 is formed in a general wave shape (sine wave shape) in which substantially arcuate concave portions 25 and convex portions 26 are alternately and continuously arranged, that is, a so-called analog signal waveform. The processing method of the inner fin 2 is not particularly limited, but for example, the sheet-shaped inner core laminating material L2 is sandwiched between a pair of embossed rolls or a pair of corrugated rolls and passed between the pair of rolls. A method of forming the uneven portion can be preferably adopted.

As described above, the inner fin 2 having this configuration is housed inside the outer capsule 1. Then, the bottom surface of the concave portion and the top surface of the convex portion of the inner fin 2 and the heat fusion layer (inner surface layer) 52 of the outer packaging body 1 are joined and integrated by heat fusion.

In the heat exchanger of the second embodiment, since the other configurations are substantially the same as those of the heat exchanger of the first embodiment, the same or corresponding parts are designated by the same reference numerals and duplicate description is omitted. To do.

In the manufacturing procedure of the heat exchanger of the second embodiment, the inner fin 2 is installed in the intermediate region of the outer packaging laminate L1 on one side (lower side), and the front end edge portion and the front end edge portion in the outer peripheral edge portion of the outer peripheral laminate L1 are further provided. Joint pipes 33 and 33 are installed at the trailing edge.

Subsequently, the other (upper) outer capsule laminate L1 is placed on the lower outer capsule laminate L1 so as to cover the inner fins 2 and the joint pipes 33 and 33. In this way, the heat-sealing layers 52 of the upper and lower outer peripheral laminates L1 are overlapped with each other, and the overlapped portions are sandwiched and heated by a pair of heat seal molds as in the first embodiment. The overlapped portion is heat-sealed to join and integrate (external capsule fusion step). The joint pipes 33, 33 are joined and integrated by heat-sealing the outer peripheral surfaces of the joint pipes 33, 33 to the heat-sealing layer 52 at the outer peripheral edge of the upper and lower outer packaging laminates L1.

Further, in the pair of outer packaging laminates L1 and L1 of the outer packaging body 1, the pair of intermediate regions facing each other are designated as a pair of facing walls 1a and 1a, and the pair of facing walls 1a and 1a are heated while being sandwiched by a pair of upper and lower heating plates. .. As a result, the heat-sealing layers 62 at the peaks and valleys of the inner fins 2 are joined and integrated with the heat-sealing layers 52 of the pair of facing walls 1a and 1a by heat-sealing (fin fusion step).

In this way, the heat exchanger of the second embodiment is manufactured. Also in the second embodiment, the external capsule fusion step and the fin fusion step may be performed separately or at the same time.

In the heat exchanger of the second embodiment, the coolant is encapsulated by allowing a heat exchange medium such as a coolant from one joint pipe 33 to flow into the enclosure 1 and flowing out from the other joint pipe 33. It circulates in the body 1 and cools the heat exchange target member by exchanging heat between the circulating cooling liquid and the heat exchange target member in contact with the outer surface of the outer packaging body 1.

In the heat exchanger of the second embodiment as well, as in the heat exchanger of the first embodiment, the fin height Hf of the inner fin 2 at the time of manufacturing the parts before the fusion step is set after the fusion step. The distance between the pair of facing walls 1a and 1a in the outer package 1 in the assembled state is set to be larger than the distance Sc. Therefore, at the time of heat fusion, the inner fins 2 are suppressed by the pair of facing walls 1a and 1a and are in a state of being compressed in the thickness direction (vertical direction). Therefore, as shown in FIG. The resins of the heat-sealing layers 52 and 62 melt and flow into the peaks and valley bottoms of the inner fins 2 to stay there, and a resin pool 4 is formed at that position, and the resin pool 4 is lifted to the outer capsule. A part of the body 1 bulges outward to form a resin pool bulging portion 41.

Since the other configurations of the heat exchanger of the second embodiment are substantially the same as those of the heat exchanger of the first embodiment, the same or corresponding parts are designated by the same reference numerals and duplicate description will be omitted.

The heat exchanger of the second embodiment having the above configuration can also obtain the same effect as the heat exchanger of the first embodiment.

1. 1. Preparation of outer packaging laminate (PE12 / adhesive / AL120 / adhesive / LLDPE40).

The aluminum foil (thickness 120 μm) of JIS H4160 A8021 as the heat transfer layer 51 was subjected to chromate treatment, and the base layer was coated on both sides (chromium adhesion amount was 10 g / m ² per side). A PET film (thickness 12 μm) was laminated as a protective layer on one surface (outer surface) of the aluminum foil via a urethane adhesive (thickness 2 μm). Further, an LLDPE film (thickness 40 μm) as a heat-sealing layer 52 was laminated on the other surface (inner surface) of the aluminum foil via a urethane adhesive (thickness 2 μm). As a result, the laminating material L1 for the external capsule was prepared.

2. Preparation of inner core laminate material (LLDPE40 / adhesive / AL120 / adhesive / LLDPE40) Chromate treatment was performed on the aluminum foil (thickness 120 μm) of JIS H4160 A8021 as the heat transfer layer 61, and the base layer was coated on both sides. (The amount of chromium adhered is 10 g / m ² per side). An LLDPE film (thickness 40 μm) as a heat-sealing layer 62 was laminated on both sides of the aluminum foil via a urethane adhesive (thickness 2 μm). As a result, the laminating material L2 for the inner fin was prepared.

3. 3. Fabrication of Tray Member 10 and Cover Member 15 According to the first embodiment shown in FIGS. 1 to 3, a sheet material obtained by cutting the outer packaging laminate material L1 is formed by deep drawing to have a depth of 4 mm ×. A tray member 11 having a recessed portion 11 having a width of 65 mm and a length of 120 mm and a flange portion 12 having a width of 10 mm formed on the entire circumference of the opening edge portion of the recessed portion 11 was produced.

The outer packaging laminate material L1 was cut to form a sheet-shaped cover member 15 having a size corresponding to the upper surface of the tray member 11, and entrances and exits 16 were formed corresponding to both sides of the recessed portion 11 of the tray member 11. Made a thing.

4. Preparation of Inner Fin 2 (1) As shown in Table 1, corrugated the inner core laminate material L2, and as shown in FIGS. 2 to 4, a rectangular wave shape (square wave) with a fin height of Hf 4.1 mm. A fin material (width 65 mm × length 60 mm) of (shape) was produced and used as the inner fin 2 of Example 1.

(2) As shown in Table 1, the inner fin 2 of Example 2 was produced in the same manner as in Example 1 above except that the fin height Hf was 4.2 mm.

(3) As shown in Table 1, the inner fin 2 of Comparative Example 1 was produced in the same manner as in Example 1 above except that the fin height Hf was set to 3.8 mm.

(4) As shown in Table 1, the inner core laminate material L2 is corrugated, and as shown in FIGS. 7 to 9, a sinusoidal fin material having a fin height of Hf 4.1 mm (width 65 mm × length). 60 mm) was prepared and used as the inner fin 2 of Example 3.

5. Fabrication of Header 3 As shown in FIGS. 2 to 4, a pipe portion 33 having an inner diameter of φ10 mm, an outer diameter of φ12 mm, and a length of 3 mm is integrally formed in a mounting box portion 31 having a height of 4 mm, a length of 65 mm, and a width of 30 mm. The header 3 was manufactured by injection molding.

<Example 1>
Headers 3 and 3 were housed at both ends of the recessed portion 11 of the tray member 10 so that the pipe portions 33 face upward. Further, the inner fin 2 of the first embodiment is housed between the headers 3 and 3 in the recessed portion 11.

Next, the cover member 15 was arranged in the tray member 10 so as to close the recessed portion 11 from above. At this time, the pipe portions 33, 33 of the headers 3 and 3 were inserted into the entrances 16 and 16 of the cover member 15 and projected above the cover member 15.

In this way, a heat exchanger temporary assembly in a non-bonded state was produced, and as shown in Table 1, the temporary assembly was subjected to a welding treatment (welding treatment) in two steps. In the first-stage welding process, the portion where the flange portion 12 of the tray member 10 and the outer peripheral edge portion of the cover member 15 overlap is sandwiched from above and below by a metal seal mold, and 180 ° C. × 0.3 MPa × Welding treatment was performed under the condition of 7 seconds, and the flange portion 12 of the tray member 10 and the outer peripheral edge portion of the cover member 15 were fused to prepare the outer package 1.

Next, in the second stage welding process, the bottom surface of the tray member 10 and the top surface of the central region of the cover member 15 are sandwiched from above and below by a metal seal mold, and the condition is 190 ° C. × 0.3 MPa × 7 seconds. The heat exchanger of Example 1 was produced by welding the bottom portion of the tray member 10 and the central region of the cover member 15 with the bottom surface of the concave portion and the top surface of the convex portion of the inner fin 2.

<Example 2>
As shown in Table 1, the heat exchanger of Example 2 was produced in the same manner as in Example 1 except that the inner fin 2 of Example 2 was used as the inner fin.

<Comparative example 1>
As shown in Table 1, the heat exchanger of Comparative Example 1 was produced in the same manner as in Example 1 above except that the inner fin 2 of Comparative Example 1 was used as the inner fin.

<Example 3>
As shown in Table 1, using the inner fin 2 of Example 3, a heat exchanger temporary assembly is produced in the same manner as in Example 1, and the temporary assembly is welded (welded) in one step. Processing) was performed.

In this welding process, the bottom surface of the recessed portion and the flange portion 12 of the tray member 10 and the entire upper surface of the cover member 15 are sandwiched from above and below by a metal seal mold, and the condition is 190 ° C. × 0.3 MPa × 7 seconds. The heat exchanger of Example 3 was produced by welding the contact portions of the tray member 10, the cover member 15, and the inner fin 2 by welding.

In the one-step welding treatment of Example 3, a heat-transmitting rubber layer (made of heat-resistant silicone rubber: product name “KE-5552” manufactured by Shin-Etsu Chemical Co., Ltd. ") Was placed. At the time of the two-stage welding treatment of Examples 1 and 2, Comparative Example 1, the heat transfer rubber was not arranged in the seal mold.

<Pressure test>
As shown in Table 1, cooling water as a heat exchange medium is circulated through each of the heat exchangers of Examples 1 to 3 and Comparative Example 1 and held at an internal pressure of 1 MPa for 5 minutes to form an outer body of each heat exchanger. The presence or absence of adhesive breakage such as peeling and swelling between 1 and the inner fin 2 was visually observed. For reference, when the adhesive fractured portion could not be confirmed even after 5 minutes, the internal pressure was excessively increased to 1.5 MPa and the observation was continued.

<Evaluation criteria for pressure resistance test>
As a result of the above pressure resistance test, those having no adhesive breakage such as peeling or swelling up to an internal pressure of 15 MPa were evaluated as excellent "◎", and adhesive breakage points such as peeling or swelling occurred up to an internal pressure of 1 MPa. However, when the internal pressure exceeded 1 MPa, it peeled off to less than 1.5 MPa, and those with adhesion failure points such as swelling were evaluated as good "○" and peeled off to less than 1 MPa, adhesion such as swelling. Those with broken parts were evaluated as defective "x". The evaluation results are also shown in Table 1.

<Appearance evaluation test>
Each of the heat exchangers of Examples 1 to 3 and Comparative Example 1 was cut, each cross section was observed, and the following items (1) and (2) were evaluated.

(1) Forming state of the resin pool 4 at the joint between the outer packaging body 1 and the inner fin 2 (2) Shape of the outer surface of the outer packaging body 1 near the position where the resin pool 4 is generated <Appearance evaluation standard>
As a result of the appearance evaluation test, those in which the resin pool 4 was formed at the joint portion and the outer packaging body 1 near the resin pool was lifted to form the resin pool bulging portion 41 were evaluated as good "○". However, when the resin pool 4 was not formed at the joint portion and the external capsule near the joint portion had a flat surface, it was evaluated as defective “x”. The evaluation results are also shown in Table 1.

As is clear from Table 1, it can be seen that the heat exchangers of Examples 1 to 3 in which the resin pool 4 is formed by increasing the fin height are excellent in pressure resistance. In particular, it can be seen that the heat exchangers of Examples 1 and 2 having a rectangular wave shape have higher withstand voltage.

On the other hand, it can be seen that the heat exchanger of Comparative Example 1 in which the fin height was set to normal or low to form a resin pool was inferior in pressure resistance.

The heat exchanger of the present invention is used for measures against heat generation around the CPU and batteries of smartphones and personal computers, measures against heat generation around LCD TVs, organic EL TVs and plasma TV displays, measures against heat generation around automobile power modules and batteries. In addition to the cooler (cooling device) used, it can be used as a heater (heating device) used for floor heating and snow removal.

1: External capsule 1a: Pair of facing walls 10: Tray member 11: Recessed portion 111: Bottom wall (opposing wall)
15: Cover member 151: Upper wall (opposing wall)
16: Doorway 2: Inner fin 25: Concave 26: Convex 4: Resin pool 41: Resin pool bulge 51: Heat transfer layer 52: Heat transfer layer 61: Heat transfer layer 62: Heat fusion layer L1: Outer packaging Laminating material L2: Inner core laminating material Hf: Fin height Sc: Spacing between upper and lower walls (pair of facing walls)

Claims (13)

An outer capsule having an inlet and an outlet and having a pair of facing walls and an inner fin provided between the pair of facing walls in the outer capsule and having an uneven portion are provided, and heat exchange flowing in from the inlet is provided. A heat exchanger in which the medium flows out from the outlet through the inner fin installation portion in the outer capsule.
The outer capsule is made of an outer capsule laminate material provided with a resin heat-sealing layer on the inner surface side of the metal heat transfer layer.
The inner fin is made of an inner core laminate material in which heat fusion layers are provided on both sides of a metal heat transfer layer.
The heat-sealing layer on the bottom surface of the concave portion and the top surface of the convex portion of the inner fin and the heat-sealing layer on the pair of facing walls are joined and integrated.
A resin pool made of the resin of each heat-sealing layer is formed at the joint between the bottom surface of the concave portion and the top surface of the convex portion of the inner fin and the pair of facing walls.
A heat exchanger characterized in that a part of the pair of facing walls bulges outward due to the resin pool to form a resin pool bulging portion. The heat exchanger according to claim 1, wherein the inner fin is arranged in a state of being compressed in a direction in which the fin height is lowered. The inner fin is provided with concave portions and convex portions alternately and continuously, and the bottom surface of the concave portion and the top surface of the convex portion are formed in a flat angular wave shape.
The heat exchanger according to claim 1 or 2, wherein the resin pool is formed in the central portion of the bottom surface of the concave portion and the central portion of the top surface of the convex portion. The heat exchanger according to any one of claims 1 to 3, wherein the heat-sealing layer of the external capsule and the heat-sealing layer of the inner fin are formed of the same type of resin. A claim that the external capsule is composed of a tray member in which a recessed portion for accommodating the inner fin is formed in an intermediate region, and a cover member arranged so as to close the recessed portion of the tray member. The heat exchanger according to any one of 1 to 4. The heat exchanger according to any one of claims 1 to 4, wherein the external capsule is composed of a pair of sheet-shaped external capsule base materials arranged so as to be overlapped with each other via the inner fins. A pair of outer capsule base materials made of an outer packaging laminate material provided with a resin heat transfer layer on the inner surface side of the metal heat transfer layer are prepared, and resin is prepared on both sides of the metal heat transfer layer. A component preparation process for preparing an inner fin that is composed of an inner core laminate material provided with a heat-sealing layer made of plastic and has uneven portions.
In a state where the inner fins are arranged between the pair of outer peripheral base materials, the heat-sealing layers of the outer peripheral edges of the pair of outer peripheral base materials are heat-sealed to join and integrate with each other, while the outer peripheral edges thereof. The pair of outer shell base materials to which the portions are heat-sealed are used as an outer package, and the intermediate regions between the pair of outer shell base materials are used as a pair of facing walls, and the bottom surface of the concave portion and the top surface of the convex portion of the inner fin are used. It includes a fusion step of heat-sealing the heat-sealing layer and the heat-sealing layer of the pair of corresponding walls to join and integrate them.
The fin height Hf of the inner fin in the component preparation step before the fusion step is set to be larger than the distance Sc of the pair of facing walls in the outer body after the fusion step. A method for manufacturing a heat exchanger. The method for manufacturing a heat exchanger according to claim 7, wherein when the distance Sc between the pair of facing walls is 100%, the height Hf of the uneven portion of the inner fin is set to 101% to 110%. The resin flowing out from each of the heat-sealing layers in the fusion step is allowed to flow into the joint portion between the bottom surface of the concave portion and the top surface of the convex portion of the inner fin and the pair of facing walls so as to form a resin pool. The method for manufacturing a heat exchanger according to claim 7 or 8. The method for manufacturing a heat exchanger according to claim 9, wherein the heat-sealing layer corresponding to the periphery of the resin pool is thinly formed by the outflow of the resin. In the fin fusion step, a pair of molds provided with a heat-conducting rubber layer on the inner surface are heated and heat-sealed with the pair of enclosure base materials sandwiched between the heat-conducting rubber layers. The method for manufacturing a heat exchanger according to any one of claims 7 to 10. Among the fusion steps, the step of fusing the outer peripheral edges of the pair of external capsule base materials to each other is referred to as the outer peripheral fusion step, and the step of fusing the inner fins to the pair of facing walls is fin fusion. As a process
The method for manufacturing a heat exchanger according to any one of claims 7 to 11, wherein the fin fusion step is performed after the external capsule fusion step is performed. Among the fusion steps, the step of fusing the outer peripheral edges of the pair of external capsule base materials to each other is referred to as the outer peripheral fusion step, and the step of fusing the inner fins to the pair of facing walls is fin fusion. As a process
The method for manufacturing a heat exchanger according to any one of claims 7 to 11, wherein the external capsule fusion step and the fin fusion step are performed by the same heat treatment step.

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