JPH11248388A - Heat exchanger and heat exchanging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a heat exchanger without requiring attention to the orientation or the arranging order of plate material by keeping a planar space defined by bending a sheet of thin plate continuously and alternately through use of protrusions and recesses provided on the thin plate and/or a reinforcing member other than the thin plate. SOLUTION: The heat exchanger 1 comprises a sheet of thin continuous ripple plate 2 contained in a housing and a heat exchange fluid flows through spaces 2a, 2b defined by the ripples. Since section plates 7, 8 are disposed substantially in the breadthwise center of the thin plate 2, a fluid entering from an inlet 9 into a laminate space 2a advances along one side of the thin plate 2 as shown by an arrow and then flows to the right side before being discharged from an outlet 10. On the other hand, a fluid entering from an inlet 11 advances along the other side of the thin plate 2 and the flows to the left side before being discharged from an outlet 12. Sufficient strength for sustaining the shape is imparted by inserting reinforcing members 220, 230 other than the thin plate 2 into the bend thereof.

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 heat exchange methods.

[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 present invention has a problem in the prior art, that is, a heat exchanger capable of greatly improving the assembling workability without paying attention to the direction and arrangement order of plate materials, and the heat exchanger. The main purpose is to provide a heat exchange method to be used.

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.

It is a further object of the present invention to provide a heat exchanger which can use an extremely thin plate as a member corresponding to a plate in a conventional heat exchanger.

[0013]

The above object has been attained by the following constitutions.

(1) A planar space formed by continuously bending one thin plate alternately is provided with irregularities or projections provided on the thin plate, and / or a reinforcing member separate from the thin plate. To maintain and use
Fluid to exchange heat on both sides of the thin plate, respectively,
A heat exchanger configured to perform heat exchange of the fluid.

(2) A planar space formed by continuously bending one thin plate alternately is maintained by using a zigzag bending formed in a part of the bending. A heat exchanger characterized in that a fluid for heat exchange is flowed to both sides of the thin plate, and heat exchange of the fluid is performed.

(3) The heat exchanger according to (1), wherein the irregularities or protrusions are formed by pressing.

(4) The heat exchanger according to the above (1), wherein the irregularities or projections and / or the reinforcing members are extended in a direction parallel to the flow direction of the fluid.

(5) At least one end of the thin plate corresponding to the moving direction of the fluid is sealed, and at the same time, the inlet and / or the inlet of the fluid are restricted so as to restrict the fluid flowing through the planar space formed on at least one side of the thin plate. Alternatively, the heat exchanger according to (1) or (2), wherein the outlet is provided in an area occupied by the thin plate.

(6) One thin plate which forms a planar space by continuous bending, means for sealing both ends of the thin plate in a direction orthogonal to the bending direction, and provided in an area occupied by the thin plate A heat exchanger provided with a reinforcing member separate from the thin plate only at the inlet and / or outlet of the fluid and near the inlet and / or outlet.

(7) One thin plate that forms a planar space by continuous bending, the thin plate is covered, and an inlet / outlet for fluid and reinforcing means different from the thin plate are integrally provided. A heat exchanger characterized by including an outer frame.

(8) The thickness of the planar space is 0.5 mm to 20 mm
(1), (2),
The heat exchanger according to (6) or (7).

(9) A heat exchange method characterized in that heat exchange is performed using the heat exchanger according to (1), (2), (6) or (7).

[0023]

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 small alternating bends, and the space created by this bend (hereinafter, this space is referred to as a laminated space or
A fluid for heat exchange flows in the insides of 2a and 2b.

Reference numerals 3 and 4 denote a front wall and a rear wall provided to seal end faces 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 a plate material different from the left and right side walls, or if necessary only in a planar space on one side, a plate material having a shape corresponding to the cross-sectional shape of the laminated space may be used.

Numerals 7 and 8 denote a partition plate provided at a substantially central portion in the width direction of the thin plate 2 and in a direction perpendicular to the width direction. 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 leakage of fluid can be prevented.

As an adhesive 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 show 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 above-described basic configuration, for example, the fluid A that has entered the stacking space 2a through the inlet 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 entrance 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 structure corresponding to a conventional laminated plate (plate) can be made using one thin plate, the number of parts can be greatly reduced.

Further, since it is a very simple structure composed of one thin plate, workability in handling, processing, assembling, etc. of the plate can be greatly improved.

Further, as in 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 drawing, 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, it 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, and communicate with the inlet 11 and the outlet 12 of the fluid supplied to the planar space formed on the other side of the thin plate facing the planar space. .

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 / 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 incorporated 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 that, for example, a virtual plane where the thin plate exists when viewed from a direction perpendicular to the upper wall (substantially with respect to the thin plate) in the drawing. Indicates that the doorway is located in a virtual plane moved vertically.

The sheet has alternating bends in the plane, so the entrance can be said to be within a certain range of sheet bends.

In any case, the above configuration contributes to downsizing of the exchanger. However, depending on various conditions, the degree of freedom is wide, for example, the entrances 9 and 10 can be located as shown in the figure, and one entrance 11 and 12 can be provided in relation to the left and right walls.

FIG. 3 is a schematic view showing a cross section taken along the line II of FIG. 2. In particular, this is for explaining the sealing of the end portion (end face) of the thin plate. I have.

In the figure, the thin plate 2 installed in the outer frame (constituted by the front, rear, left and right walls and the like as described above) starts at one end (end surface) 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 in the bending direction (left and right directions in the drawing) and the outer frame can be joined 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. 5A shows the basis of the waveform and FIG. 5D shows the basis of the accordion. FIGS. 5B, 5C, 5E, and 5F show the case where the amplitude is reduced or the top of the accordion is reduced. It is each modification which processed the shape.

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

In order to solve such a problem,
The method of reinforcement will be described.

One method is to increase the strength by providing irregularities or projections on the thin plate itself, an example of which is shown in FIG.

(A) shows a projection 20 projecting from the reference plane.
0, a subsequent plane (reference plane) 201, a part 202 (concave portion with respect to the convex part as viewed from the reference plane) protruding in the opposite direction to the projection direction of the projection, and a subsequent plane (reference plane) 203 as one unit. , An embodiment formed continuously.

(B) shows a mode in which a projection 205 is provided by bonding a thin wire made of metal or a rigid body having a triangular cross section to a thin plate.

(C) is a modification of the above (a), in which the plane between the projection and the recess is eliminated, and the projection 200, the recess 202, and the plane (reference plane) 203 are continuously formed as one unit. The following shows an embodiment.

The irregularities or projections are directed in a direction perpendicular to the bending (bending) direction (for example, the left-right direction in FIG. 3) of the thin plate (in FIG. 3, a direction in which the sheet passes from the front to the back of the paper), that is, It extends a predetermined length in the same direction as the flow direction.

By forming the irregularities and the like and arranging them in the outer frame in relation to the flow direction of the fluid, the pressure loss of the fluid can be minimized.

The irregularities can be formed by pressing, and may not be formed continuously as described above, but may be formed in a discontinuous form excluding a bent portion.

Furthermore, in the direction of flow of the fluid, there is no necessity to provide it over its entire length.

As a modification, for example, instead of the protrusion 205, a small zigzag fold may be formed to help maintain the shape.

A second method of reinforcement is to insert a reinforcing member 210 separate from the thin plate into the bent portion of the thin plate (one reinforcing member is shown in FIG. 3) and to suspend the bent portion. This is a method of fixing the position of the reinforcing member to the outer frame (here, the left and right walls).

A third reinforcing method is to insert a reinforcing member 220 (one reinforcing member is shown in FIG. 3) separate from the thin plate into the laminated space 2b and fix it.

In some cases, the reinforcing member 220 may be provided only near the inlet and outlet of the fluid.

Further, as a fourth method, a reinforcing member 230 (one reinforcing member is shown in FIG. 3) separate from the thin plate is provided only on the bottom wall side of the laminated space 2a and near the inlet / outlet of the fluid. This is a method of fixing and providing. As the reinforcing member 230, a member having little influence on the flow of the fluid, such as a coil spring having a coarse pitch, is preferable.

In addition to the above, instead of using the left and right side walls, the laminating space formed by the thin plates can be sealed at both ends with plate members, and the sealing means can be used for reinforcement. The shape of the sealing means (plate material) at this time is desirably a shape that matches the cross-sectional shape of each of the laminated spaces 2a and 2b.

In the above, whether or not the reinforcing member is provided in both of the laminated spaces 2a and 2b and the size are determined by the purpose of use,
It can be appropriately determined according to the required conditions such as heat exchange capacity, and the above-mentioned forms can be used in combination.

Further, including the above-described embodiment, the reinforcing member may be provided integrally with the outer frame together with the frame 90 for limiting the entrance and exit of the fluid.

In any case, the shape of the lamination space need not be maintained perfectly, as long as it can be maintained within a range that does not greatly affect the flow of the fluid.

According to the above-described structure, even a material having a small thickness and a slightly 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 it is possible to avoid clogging due to dust and to reduce pressure loss, it is desirable to make the gap on the inlet side into which the fluid flows as shown in FIG.

Regarding the laminated spaces 2a and 2b formed by the opposed surfaces of the thin plate, the interval between the opposed surfaces by the plate surface 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 when the maintenance of moisture in the air is taken into consideration, a nonwoven 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.

The following are conceivable for use in sealing or joining the end (end face) of the thin plate 2 to the outer frame.

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 adhesive 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.

[0089]

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, by using a simple reinforcing member, it is possible to have a sufficient strength even in a case where the strength is insufficient in maintaining the shape, and the degree of freedom of use can 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 view showing a cross-sectional shape of the thin plate along a line II in FIG. 2;

FIG. 4 is a diagram showing an example of a processing shape applied to a plate for reinforcement.

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

[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 200 Convex 201, 203 Flat 202 Concave 205 Projection 210, 220, 230 Reinforcing member T1 Top wall T2 Bottom wall

Claims (9)

[Claims] 1. A sheet-like space formed by continuously bending one thin plate alternately is formed by using irregularities or projections provided on the thin plate and / or a reinforcing member separate from the thin plate. A heat exchanger, wherein the heat exchange is performed by flowing fluids for heat exchange on both sides of the thin plate, respectively, and performing heat exchange on the fluids. 2. A structure in which a planar space formed by continuously bending one thin plate alternately is maintained by using a zigzag bending formed in a part of the bending. A heat exchanger characterized in that a fluid for heat exchange is flowed on both sides of the thin plate, and heat exchange of the fluid is performed. 3. The heat exchanger according to claim 1, wherein the projections and depressions are formed by pressing. 4. The heat exchanger according to claim 1, wherein the projections and depressions and / or the reinforcing members extend in a direction parallel to a flow direction of the fluid. 5. In order to restrict a fluid flowing through a planar space formed at least on one side of the thin plate, both ends of the thin plate corresponding to a moving direction of the fluid are sealed, and an inlet and / or an inlet for the fluid are sealed. 3. The heat exchanger according to claim 1, wherein an outlet is provided in an area occupied by the thin plate. 6. A single thin plate forming a planar space by continuous bending, means for sealing both ends of the thin plate in a direction orthogonal to the bending direction, and provided in an area occupied by the thin plate. A heat exchanger characterized in that a reinforcing member is provided separately from the thin plate only at the inlet and / or outlet of the fluid and near the inlet and / or outlet. 7. A thin plate which forms a planar space by continuous bending, and a cover for covering the thin plate, a fluid inlet / outlet,
And a heat exchanger including an outer frame integrally having reinforcing means different from the thin plate. 8. The thickness of the planar space is 0.5 mm to 20 mm.
The heat exchanger according to claim 1, 2, 6, or 7, wherein 9. A heat exchange method comprising performing heat exchange using the heat exchanger according to claim 1. Description: