JPH11254047A - Bending method for thin sheet used in heat exchanger and heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat exchanger capable of largely improving assembling workability without worrying about a directional property of arranging order, etc., of a plate stock in a conventional heat exchanger and a bending method of a thin sheet used inn the heat exchanger. SOLUTION: In a bending method of a thin sheet used in a heat exchanger, a pressurizing force is exerted in a state that locating parts 200, 201 of a hole, notch or projection, etc., provided at a specified interval along the side part of a thin sheet 2 are controlled by guide members 204, 205 engaging with the locating parts 200, 201, bending is formed, the direction of bending is alternated, and laminated spaces are formed. Also, the heat exchanger is provided with the thin sheet 2 having continuous and alternate bending and the guide members 204, 205 which are engaged with the locating parts 200, 201 provided along the side part of the thin sheet 2 at the time of alternately bending the thin sheet 2. Edge parts of the thin sheet 2 are sealed, and heat exchanging is executed by causing a fluid for heat exchanging to flow into a face-like space formed by both surface sides of the thin sheet 2 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger having a heating or cooling source such as an air conditioner, an automobile, a power generator, a cooling facility, a drying facility or a device, or a device or a device for maintaining a temperature. And a method of bending a thin plate used in the heat exchanger.

[0002]

2. Description of the Related Art As a highly efficient heat exchanger, Japanese Patent Publication No. 63-
There are known heat exchangers as disclosed in JP-A-43679, JP-A-61-41895, JP-A-6-123570 and the like.

[0003] Specifically, a laminated heat exchanger having a large heat transfer area by laminating a plurality of plate materials (also referred to as a plate heat exchanger or a plate fin heat exchanger).
It has been known.

This is a system in which a different fluid flows for each layer to exchange heat.

[0005] The plate type or plate fin type heat exchangers have their respective features.

For example, in a plate heat exchanger, the heat transfer area can be easily increased or decreased by changing the number of plates.
The flow pattern can be changed depending on how the plates are stacked,
In addition, cleaning and inspection can be easily performed by disassembly.

[0007] Further, the plate-fin type heat exchanger can be formed in either an orthogonal or counter-current manner in a stacking manner, the fins can be used as a reinforcing material, and the heat transfer area per capacity can be increased in a compact and light weight.

[0008]

However, the laminated heat exchanger as described above incorporates a large number of plate members and measures integration, and does not confuse the directionality and arrangement order of the plate members. This is inconvenient to handle, and at the same time it is time consuming to assemble.

[0009] Further, there is a problem that these results in high costs.

The main object of the present invention is to provide a heat exchanger capable of greatly improving the assembling workability without taking care of the problems in the prior art, that is, without regard to the direction and arrangement order of the plate members. And

It is another object of the present invention to provide a low-cost heat exchanger by reducing the number of parts as much as possible and preventing fluid leakage.

Another object of the present invention is to provide a method for bending a thin plate used as a member corresponding to a plate in a conventional heat exchanger.

[0013]

The object of the present invention has been attained by the following constitutions.

(1) A pressing force is applied in a state where a positioning portion such as a hole, a notch, or a projection provided at a predetermined interval along a side portion of the thin plate is regulated by a guide member engaged with the positioning portion. And forming a bend, and alternately changing the direction of the bend to form a laminated space, the method for bending a thin plate used in a heat exchanger.

(2) The heat exchanger according to (1), wherein the thin plate is bent a plurality of times with respect to the guide member, and then a bending force is formed by applying a pressing force. The bending method of the thin plate to be used.

(3) A guide member having a substantially U-shape, wherein the protrusions or recesses of the guide members having mutually aligned protrusions or recesses on the two opposite sides thereof in an overlapped state are formed of a thin plate. A heat exchange characterized by being formed along a side portion and being formed by repeating a step of bending the thin plate by overlapping with a concave or convex engaging with the convex or concave on the guide member. Bending method for thin plates used in vessels.

(4) The method according to the above (1) or (1), wherein a bend is formed by applying a pressing force after inserting a spacer between one surface of the thin plate and a surface opposed to the surface. A method for bending a thin plate used in the heat exchanger according to (2).

(5) The present invention is used for a heat exchanger characterized in that irregularities are provided alternately at predetermined intervals in the width direction of a thin plate, and the thin plates are alternately bent based on the irregularities as a bending position reference. Bending method of thin plate. (6) a thin plate having continuous alternating bending, and a guide member engaged with a positioning portion provided along a side portion of the thin plate when the thin plate is bent alternately; A heat exchanger characterized in that heat exchange is performed by flowing fluids for heat exchange into planar spaces formed on both sides of the thin plate, the ends of which are sealed.

(7) The heat exchanger according to the above (6), wherein an inlet / outlet for the fluid is provided in a region occupied by the thin plate.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view for explaining the concept of the heat exchanger according to the present invention.

In the drawing, reference numeral 1 denotes the entire heat exchanger. 2
Is a single thin plate (plate material) formed into an accordion shape by continuously forming alternating small bends, and a space (hereinafter, this space is referred to as a laminated space or a planar space) 2a formed by this bend. A fluid for heat exchange flows in 2b.

Numerals 3 and 4 denote a front wall and a rear wall provided to seal the end surfaces of the thin plate 2 in the bending direction, and have substantially the same width as the thin plate.

Reference numerals 5 and 6 denote left and right side walls (hereinafter referred to as front and rear walls 3, 4 and left and right side walls 5, 5) provided to seal end faces of the thin plate 2 in a width direction (a direction orthogonal to the bending direction). When it is convenient to collectively describe 6, the outer frame is used.)

The sealing means may be made of a plate material different from the left and right side walls, and depending on the case, if necessary only in one planar space, the cross section of the laminated space 2a or 2b may be used. It can be sealed with a plate material having a shape suitable for the shape.

Reference numerals 7 and 8 denote partitioning plates provided at a substantially central portion in the width direction of the thin plate 2 and in a direction orthogonal to the width direction, and are vertices of bending at upper and lower portions of the thin plate. Are connected so that one end thereof contacts.

The thin plate 2, the outer frames (3, 4, 5, 6) and the partition plates 7, 8 are bonded or sealed by bonding means, so that fluid leakage can be prevented.

As the bonding means, an appropriate means such as an adhesive, packing, welding, brazing, or melting can be selectively used.

The details of the bonding means will be described later.

9 and 10 are one surface of the thin plate 2,
That is, the inlet and outlet of the fluid A with respect to the stacking space 2a, and 11 and 12 indicate the opposite surface of the thin plate, that is, the inlet and outlet of the fluid B with respect to the stacking space 2b.

The fluid A and the fluid B may have the same properties or different properties, and can be determined according to various conditions such as the application.

Since the heat exchanger 1 has the basic structure as described above, for example, the fluid A that has entered the stacking space 2a from the entrance 9 is, as shown by an arrow, in the stacking space or the planar shape. It proceeds along one surface of the thin plate 2 forming a space, flows to the right in the figure, and is discharged from the outlet 10.

On the other hand, the fluid B entering from the inlet 11
Goes along the other surface of the thin plate constituting the laminated space 2b,
After flowing to the left in the figure, it is discharged from the outlet 12.

The heat exchange is performed with the movement of the fluid for heat exchange through the thin plate 2.

In the above-described embodiment, since a configuration corresponding to a conventional laminated plate (plate) can be made using one thin plate, the number of parts can be greatly reduced.

Further, since the structure is extremely simple made of one thin plate, workability in handling, processing, assembling, etc. of the plate can be greatly improved.

Further, as in the case of assembling the conventional device,
There is almost no need to care about the directionality of the plate material, and the arrangement order can be excluded from consideration.

FIG. 2 is a schematic view showing a heat exchanger having an outer shape different from that of FIG. 1. Basically, similarly to FIG. 1, one thin plate having a planar space formed by alternately and continuously bending. Built-in.

In the figure, the same members as the members (means) in FIG. 1 or the members (means) having the same functions are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, T1 is an upper wall which is an element constituting the outer frame, and has a similar bottom wall T2 at the lower part.

Reference numerals 90 and 100 denote frames provided on the upper wall side.
As described above, each of them communicates with the inlet 9 and the outlet 10 of the fluid supplied to one side of the planar space formed by the thin plate.

Reference numerals 110 and 120 denote frames provided on the bottom wall side. The inlet 11 and the outlet 12 for the fluid supplied to the planar space formed on the other side of the thin plate facing the planar space.
Is in communication with

In other words, 90 and 110 are substantially fluid inlets, and 100 and 120 are substantially fluid outlets.

The relationship between the thin plate and the inlet and outlet of the fluid in the present embodiment is the same as the relationship between the thin plate and the inlet (9, 11) and the outlet (10, 12) in FIG.

That is, the entrances 9 to 12 are provided in a region occupied by a thin plate built in an outer frame formed by the front and rear walls, the left and right walls, and the upper bottom wall.

Here, the presence of the entrance in the area occupied by the thin plate means, for example, that the thin plate is present when viewed from above in a direction perpendicular to the upper wall (substantially with respect to the thin plate) in the drawing. This means that the doorway is located in a virtual plane that has been moved vertically in the plane.

The lamellas have alternating bends in the plane, so the entrance can be said to be within a certain range of lamellae.

In any case, the above configuration contributes to downsizing of the exchanger. However, according to various conditions, for example, the entrances and exits 9 and 10 can be placed at positions as shown in the figure, and one of the entrances and exits 11 and 12 can be provided in relation to the left and right walls, so that the degree of freedom in design is wide.

The upper wall T1 and the frames 90 and 100, and the bottom wall T2 and the frames 110 and 120 may be integrated with each other to form a lid with respect to the frame incorporating the thin plate. I can do it.

FIG. 3 shows the outline of the embodiment.
The shapes of the members 100, 110, and 120 are different from each other, and the same members as those described above or members having the same functions are denoted by the same reference numerals, and description thereof is omitted. .

FIG. 4 is a schematic view showing a cross section taken along the line II of FIG. 2, particularly for explaining the sealing of the end (end face) of the thin plate.

In the figure, the thin plate 2 installed in the outer frame (constituted by the front, rear, left and right walls as described above) starts at one end (end face) S (upper left in the figure), The other end (other end face) through the part that is alternately bent
F (upper right in the figure).

The ends (end faces) S, F of the thin plate 2 and the outer frame in the bending direction (left and right directions in the drawing) can be joined to the outer frame by using the above-mentioned means such as an adhesive to prevent leakage of the fluid. The sealing has been completed.

The direction perpendicular to the bending direction (width direction)
The joining between both ends (both end surfaces) of the thin plate 2 and the outer frame is also sealed by the same means.

In the embodiment, the bent shape of the thin plate is an accordion shape.
Various shapes as shown in FIG. 5 can be provided.

FIG. 5 (a) shows the basis of the wave shape, and FIG. 5 (d) shows the basis of the accordion shape. FIGS. 5 (b), (c) and (e) and (f) show the case where the amplitude is reduced and It is each modification which processed the shape.

By the way, as a material of the thin plate according to the present invention, various materials described later can be adopted, and a plate having a thickness of about several tens μm can be used. In the case of a thin material, strength may be insufficient to hold the planar space (laminated space) by itself.

Hereinafter, the bending of the thin plate used in the heat exchanger and the maintenance of the strength or the lamination space will be described.

FIG. 6A shows a thin plate 2 having a positioning portion (positioning means) formed of a small hole provided along the side in the width direction thereof, and FIG. It is a figure showing an example of a bending method.

In the drawing, reference numerals 200 and 201 denote small holes (positioning portions) provided on both sides of the thin plate, which are formed at specified intervals in accordance with the size of bending.

In the embodiment, two portions are provided on the left and right sides with respect to one bending surface.

After such small holes are formed in the previous step, the thin plate is fed, and the small plates are supplied to the guide members 204 and 205 on the guide base 202 at predetermined intervals. The holes 200 and 201 are engaged to regulate the position. Next, the thin plate is folded back in the overlapping direction with respect to the surface of the thin plate whose position is fixed by the engagement, and the small hole and the guide member are moved in the same manner as described above. Engage.

After the above operation is repeated an appropriate number of times, pressing force P is applied from above to form a predetermined bend, and a plate member corresponding to a conventional laminated plate required for one heat exchanger is obtained. .

In the above, it is desirable to apply a pressing force after inserting a spacer corresponding to the material, the thickness, the cross-sectional shape, etc. between the surfaces formed of the thin plates.

When the thin plate is made of a soft material or the like, the pressing can be performed with a hand or a simple jig. When a large pressing force is required, a pressing machine may be used.

The bending is not limited to the above-described method, but may be formed one by one.

The bent thin plate is removed from the guide base 202 integrally with the guide members 204 and 205 and is housed in an outer frame as shown in FIG. 1 or the like to constitute a heat exchanger. This is convenient because it can function as a reinforcing member for maintaining the shape of the laminated space. At this time, the spacer is taken out.

In other words, completely different functions of regulating the position of the thin plate at the time of bending and reinforcing it when incorporated in the heat exchanger can be performed by one member, which can be said to be effective in reducing man-hours.

FIG. 7 shows that the positioning portion is changed to the small hole to form notches 200 and 201, and the guide member is also changed to the columnar guide member, and a square member 204 which can be mechanically engaged with the notch. It is the schematic which showed the other bending method which was set to 205. Since a process is the same as the above, description is abbreviate | omitted. Also in this case, it is desirable to insert a spacer for each bent portion to apply a pressing force.

In this modified example, a side portion of the thin plate 2 is formed as a projection by changing to the notch, and a groove is formed in the guide member so as to be able to engage with the projection. The predetermined bend may be formed by the method.

The thin plate 2 manufactured by such a method is the same as that shown in FIG.
As in the case of (1), the heat exchanger can be configured by being housed in the outer frame together with the guide members 204 and 205, and the same effect can be obtained.

FIG. 8 shows a concave portion 211 and a convex portion 210 which are alternately formed at predetermined intervals in the width direction of the thin plate as a positioning portion.

In this case, a spacer is inserted each time the uneven portion produced in the previous step is fed, and a pressing force is applied to perform bending.

FIG. 9 is a view showing still another bending method.

In the figure, reference numerals 200 and 201 denote positioning portions as described above. This positioning part is thin plate 2
It is the same as that described in the other method that it is formed of protrusions (convex portions) extruded upward on both side portions of the substrate and is formed at a predetermined interval. However, the projection following the projection projects in the opposite direction.

In other words, the projections on the thin plate are formed with the concave and convex portions alternately with respect to one surface.

Reference numeral 220 denotes a substantially U-shaped guide member (which also has a spacer function), and has two opposite sides 221 and 222.
The projections (projections) 225 and 226 that engage with the projections
Having.

Also in this case, the guide member 220 is inserted every time the thin plate is bent alternately, and a pressing force is applied to complete the bending of the thin plate.

The concave convex portions 200 and 201 on the thin plate may be holes that engage with the guide member projections 225 and 226. The projections on the guide member are configured to be aligned with each other when the guide members are overlapped.

As described above, a thin plate can be bent with good accuracy by the simple method.

Further, in particular, by using the guide member, even a material having a small thickness and insufficient strength can be used as an element constituting the heat exchanger.

The shape of the laminated spaces 2a and 2b is as follows.
Since clogging due to dust can be avoided and pressure loss can be suppressed to a small value, it is desirable to make the gap on the entrance side where the fluid flows into a large shape as shown in FIG.

In the laminated spaces 2a and 2b formed by the facing surfaces of the thin plates, the facing surface interval between the plate surfaces is preferably about 0.5 mm to 20 mm. More preferably, the interval is 15 mm.

The material of the thin plate 2 may be a metal material selected from aluminum, copper, stainless steel, iron, titanium, etc., polyethylene, polypropylene, polyvinyl chloride,
Polyvinylidene chloride, polyethylene terephthalate, A
BS resin, nylon, polyamide-imide, polyetherimide, polyethersulfone, fluororesin (PTF
E, FEP, PFA, EPE, ETFE, PCTFE,
Any material that can be bent, such as a plastic sheet material selected from PVDF, ECTFE, and PVF), a woven fabric, a nonwoven fabric, a paper, a fiber, a board, and a ceramic material, can be used. .

In particular, aluminum, stainless steel, and plastic sheets are preferable in terms of securing the shape or when a liquid is used as a fluid, and aluminum is desirable when importance is placed on thermal conductivity.

When the fluid is air and the maintenance of moisture in the air is taken into consideration, a non-woven fabric made of polyester, polyethylene or polypropylene is suitable in addition to plastic sheets and paper.

The thickness is about 5 μm to about 1 for a metal material.
mm is preferable, and the strength is 10 μm to 100 μm.
It is more preferable in view of workability.

In the case of a plastic sheet or the like, about 20 μm
m or more is useful.
m or more is preferable.

However, as long as the guide member is integrally incorporated, even the extremely thin material can be sufficiently used.

The following can be considered as those used for sealing or joining the end (end face) of the thin plate 2 to the outer frame or the like.

First, natural rubber, isoprene rubber, styrene-
Butadiene rubber, acrylonitrile-butadiene rubber,
Butyl rubber, ethylene-propylene rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene rubber, epichlorohydrin rubber, urethane rubber, multi-flow rubber, silicon rubber, hydrogenated nitrile rubber, fluorine rubber and the like can be used.

Examples of the adhesive include cyanoacrylate, acrylic for acrylic structure, epoxy resin, EVA hot melt, nylon hot melt, polyester, plastic solder par salon type polyamide, silicon RTV,
Chloroprene rubber, vinyl chloride vinyl acetate resin, vinyl acetate, structural adhesive (polymer alloy type), polyimide, gum arabic,
Water glass, ceramic resin agents and the like can be used.

Further, a molten metal (solder, zinc, tin, aluminum, iron), a rubber, a thermosetting plastic, a thermoplastic plastic, or a ceramic in a form solidified from a liquid can be used.

[0094]

According to the present invention, a member corresponding to the conventional laminated plate is constituted by one thin plate, so that there is almost no need to pay attention to the directionality and arrangement order of the plate materials, and the number of parts can be greatly reduced. Improved assembly workability.

Further, the bending of a thin plate used for a heat exchanger can be ensured by a simple method, and such a thin plate can be used in place of a plate (laminated plate) used for a conventional heat exchanger. By using the means (members), it was possible to have sufficient strength even if the strength was insufficient in maintaining the shape, and the degree of freedom in design could be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining the concept of a heat exchanger according to the present invention.

FIG. 2 is a diagram illustrating an outer shape of a heat exchanger of another embodiment.

FIG. 3 is a diagram showing an outer shape of a heat exchanger of another embodiment.

FIG. 4 is a diagram showing a cross-sectional shape of the thin plate along a line II in FIG. 2;

FIG. 5 is a diagram showing a waveform and an accordion-type bending shape that can be applied to a thin plate.

FIG. 6 is a diagram illustrating an example of a bending method.

FIG. 7 is a diagram illustrating an example of a bending method.

FIG. 8 is a diagram illustrating an example of a bending method.

FIG. 9 is a diagram showing an example of a bending method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Thin plate (plate material) 2a, 2b Stacking space 3 Front wall 4 Rear wall 5, 6 Side wall 7, 8 Partition plate 9, 11 Fluid inlet 10, 12 Fluid outlet 90, 100, 110, 120 Frame 200 , 201 positioning part 202 guide base 204, 205 guide member 210 convex part 211 concave part T1 top wall T2 bottom wall

Claims (7)

[Claims] 1. A pressing force in a state where a positioning portion such as a hole, a notch, or a projection provided at a predetermined interval along a side portion of a thin plate is regulated by a guide member engaged with the positioning portion. A method for bending a thin plate used in a heat exchanger, wherein the laminating space is formed by applying and forming a bend, and alternately changing the direction of the bend. 2. The heat exchanger according to claim 1, wherein the thin plate is bent a plurality of times with respect to the guide member, and then a bending force is formed by applying a pressing force. Bending method of thin plate. 3. A guide member having a substantially U-shape, wherein the protrusions or recesses of the guide member having protrusions or recesses which are aligned with each other in an overlapped state on each of two opposite sides are provided on the side of the thin plate. Is provided along the section, and
A method of bending a thin plate for use in a heat exchanger, comprising forming a thin plate by repeating a step of bending the thin plate by overlapping with a concave or convex engaging with the convex or concave on the guide member. 4. A bend formed by inserting a spacer between one surface of the thin plate and a surface opposed to the surface, and then applying a pressing force to form a bend. 3. The method for bending a thin plate used in the heat exchanger according to 2. 5. In the width direction of the thin plate, at predetermined intervals, and
A method of bending a thin plate for use in a heat exchanger, wherein the thin plate is alternately bent with the unevenness being provided alternately with the unevenness as a reference for a bending position. 6. A thin plate having a continuous alternating bending, and a guide member engaged with a positioning portion provided along a side portion of the thin plate when the thin plate is bent alternately, and A heat exchanger characterized in that the ends of the thin plate are sealed, and heat exchange is performed by flowing fluids for heat exchange into planar spaces formed on both sides of the thin plate. . 7. The heat exchanger according to claim 6, wherein an inlet / outlet for the fluid is provided in a region occupied by the thin plate.