JP2003090692A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of restraining the manufacturing cost of the same. SOLUTION: The heat exchanger 1 is constituted of a plurality of stacked substrates 31. The substrate 31 is integrally formed of sheet bodies 32 and projected parts 33, projected on the surface of the sheet body 32, to secure flow routes between the stacked substrates 31. The projected parts 33 of both side rims of the substrates 31 constitute bulkheads for precluding the flow of fluid which flows through the flow routes on the substrates 31 toward the outside of the flow direction of the fluid while respective substrates 31, arranged up-and-down, are arranged while turning them alternately by 90 deg. so that the directions of flow of fluid in the extending directions of the projected parts 33 or the flow directions determined by the projected parts 33 are intersected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger that alleviates a temperature difference between an inflowing fluid and an outflowing fluid.

[0002]

2. Description of the Related Art Conventionally, a ventilator is used for discharging dirty air in a room and taking in fresh air outdoors. As the ventilator, there is a combination of air taken in and air in the room. There is known one provided with a heat exchanger for reducing the temperature difference.

This heat exchanger has a core 7 as shown in FIG.
01 is built-in, and the core 701 is a flat plate 70 made of paper.
2 and paper corrugated sheets 703 press-formed in a corrugated shape are alternately laminated, and the corrugated sheets 703 arranged above and below are
The ridges are arranged so that they intersect at right angles. This core 701
Indicates an indoor side 705 with a position indicated by a broken line 704 in the drawing as a boundary.
And the outdoor side 706.

That is, the air in the room is constructed so as to pass through the core 701 and be discharged to the outside of the room, as shown by arrows E to F. Also, the outdoor air is
As indicated by an arrow G to an arrow H, the core 701 is configured to pass through and flow into the room.

At this time, the exhausted air and the inflowing air are configured so as to pass through the upper and lower spaces sandwiching the flat plates 702 ,. It is configured so that heat can be exchanged via the flat plates 702, ....

[0006] With this, during cooling or heating, the change in the room temperature that may occur due to the introduction of outside air can be suppressed.

[0007]

However, in such a conventional heat exchanger, the corrugated plates 703, ... To separate the flow path of the fluid passing through the corrugated plate 703.
.. It was necessary to provide flat plates 702, .. Therefore, the flat plates 702, ... And the corrugated plates 703, ...
・ I had to prepare two parts.

A flat plate 702 is provided between the corrugated plates 703 and 703.
Therefore, when assembling so that the ridge lines of the upper and lower corrugated plates 703 and 703 intersect, confirmation work is required, resulting in a decrease in work efficiency.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a heat exchanger capable of suppressing the manufacturing cost.

[0010]

In order to solve the above problems, a heat exchanger according to a first aspect of the present invention performs heat exchange between a stacked inflow path and outflow path, and
In a heat exchanger in which the flow direction of the fluid flowing through the inflow path and the flow direction of the fluid flowing through the outflow path are set to intersect with each other, a plurality of projecting portions are integrally projected. A plurality of sheet-shaped base materials are laminated to form the inflow path or the outflow path between the base materials, and a partition wall for blocking the flow of the fluid to the outside of the flow direction in each of the paths is formed by the protruding portion. Configured.

That is, when forming this heat exchanger, a plurality of sheet-like base materials having a protruding portion are laminated. At this time, since the protrusion is provided on each base material, an inflow path or an outflow path is secured between the stacked base materials by the protrusion.

A partition wall is formed on the base material by the protrusion to prevent a fluid from flowing out of a predetermined flow direction. Therefore, the stacking operation of the respective base materials is performed while confirming the extending direction of the protruding portion and the like.

Further, in the heat exchanger according to the second aspect of the invention, the precursor capable of forming the protruding portion after solidification is applied to the base material and solidified to form the protruding portion on the base material.

That is, the protrusion is integrally formed on the base material by applying a precursor, which can become the protrusion after solidification, to the base material and solidifying the precursor.

Further, in the heat exchanger of claim 3, the base material is made of metal.

That is, the base material that divides the inflow path and the outflow path and that is responsible for the heat exchange portion is formed of a metal having a high thermal conductivity. Thereby, the heat exchange efficiency between the fluid passing through the inflow path and the fluid passing through the outflow path is enhanced.

In addition, in the heat exchanger of claim 4,
The substrate was made of paper.

That is, the base material that divides the inflow path and the outflow path is formed of paper that absorbs and discharges moisture. Therefore, even if there is a large difference in humidity between the fluid passing through the inflow path and the fluid passing through the outflow path, the difference in humidity is adjusted by the paper base material.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment)

The first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a heat exchanger 1 according to the present embodiment, and a part of the heat exchanger 1 is shown. The heat exchanger 1 is provided, for example, in a ventilation device installed in a house.

This ventilator is a device for discharging dirty air in the room and taking in fresh air outdoors, as in the conventional example. As shown in FIG. The heat exchange chamber 12 is provided with the heat exchanger 1 for reducing the temperature difference between the air taken in from the outside and the air discharged from the room.

The heat exchange chamber 12 has a cubic shape,
Each of the wall surfaces 15, ... Is provided with first to fourth connection ports 21 to 24 communicating with the inside. This heat exchange chamber 12
Indicates an indoor I side and an outdoor O at the position indicated by a broken line 25 in the figure.
The connection ports 21 to 24 of the wall surfaces 15 and 15 facing each other provided in the heat exchange chamber 12 are partitioned so as to form a pair.

That is, the air in the room I is supplied to the first connection port 2
1 flows into the heat exchange chamber 12 as indicated by an arrow A, passes through the heat exchanger 1, and passes through the second connection port 2 as indicated by an arrow B.
2 is discharged to the outside O. On the other hand, the air outside O flows from the third connection port 23 into the heat exchange chamber 12 as shown by an arrow C, passes through the heat exchanger 1, and from the fourth connection port 24 as shown by an arrow D. It is configured to be supplied to the room I, and during this period, the air discharged to the outside O and the air supplied to the room I
It is configured to perform heat exchange.

The heat exchanger 1 has, as shown in FIG.
It is constituted by a plurality of laminated base materials 31, .... The base material 31 is a square sheet-like sheet body 32.
, And the projections 33, ..., which are arranged on a plurality of straight lines at equal intervals on the surface of the sheet body 32, are integrally formed. Three
It is configured so that a flow path can be secured between 1 and 31.

The protrusions 33 extending on both side edges of the base material 31 constitute partition walls which prevent the fluid flowing through the flow path formed on the base material 31 from flowing out of the flow direction. Each of the base materials 31, 31 arranged vertically is rotated 90 degrees so that the extending direction of the projecting portion 33, that is, the flow direction determined by the projecting portion 33 intersects. It is arranged.

As a result, as shown in FIG. 2, the protrusions 33, ... Extend from the first connection port 21 to the second connection port 22.
Outflow paths 41, ... For discharging the air in the room I to the outdoors O are formed on the base material 31 extending toward the side. Further, on the base material 31 in which the protruding portions 33, ... Extend from the third connection port 23 toward the fourth connection port 24 side,
An inflow path 42 through which the air of the outdoor O flows into the indoor I, ...
Are formed so that heat can be exchanged between the air flowing through the inflow paths 42, ... And the air flowing through the outflow paths 41 ,. .

The sheet body 32 constituting the base material 31 is
It is made of metal such as aluminum foil and is made of a material with a relatively high thermal conductivity. The sheet 32 is not limited to metal, and it is preferable to use plastic film, paper, fiber or the like depending on the use environment and the required function.

The projecting portion 33 is made of a special resin precursor that can be thickened. That is, the resin precursor, which can become the protrusion 33 after solidification, is applied to the sheet body 32 and solidified, so that the resin precursor is formed on the sheet body 32. The protrusion 33 has elasticity and a restoring force against bending, a shape holding force, and the like.

FIG. 3 is a view showing a manufacturing process of the base material 31, and at the time of manufacturing, as shown in FIG.
In the step (setting step), the frame 51 is placed in a state of being placed on the sheet body 32.

The frame 51, as shown in FIG.
The horizontal rails 61, 61 arranged to face each other, and the both horizontal rails 61,
61 provided between the vertical bars 62, ... Between the vertical bars 62, ..., there are formed openings 63, ... There is. The thickness dimension T of the frame 51 is determined according to the wall thickness of the projecting portion 33 to be molded, and the length dimension L and the width dimension W of the opening 63 also depend on the outer diameter dimension of the projecting portion 33. Is formed. Thereby, the thickness dimension T of the frame 51 is made thick, and the projecting portion 33 in the shape of a quadrangular prism having the same shape as the opening 63 can be formed.

The sheet body 32 is formed in a thin sheet shape, and its outer diameter dimension is set to be substantially the same as that of the frame 51. This frame 51 is
It is made of a material having a hard-to-stick property that prevents sticking of the resin precursor 71 described later, and specific examples thereof include polypropylene (PP) and PET. Further, the sheet body 32 is formed of a material that allows the resin precursor 71 to be fixed, and specific examples thereof include vinyl chloride,
Examples include easily-adhesive treated PET, paper, PC (polycarbonate), and aluminum foil, and aluminum foil was used in the present embodiment. Further, the sheet body 51 is not limited to be thin and may be plate-shaped.

In the second step (pouring step), as shown in FIG. 3 (b), the resin precursor 71 which starts curing by ultraviolet rays is poured on the frame 51 arranged on the sheet body 32. The resin precursor 71 is added to the frame 5
1 is poured into the openings 63, ...

The resin precursor 71 does not break when bent after being solidified, has elasticity and a restoring force, and has the arch action property of retaining the shape.
The following components are mixed in respective proportions.

[0034]   Urethane acrylate: 54 parts by weight   Acrylate monomer: 30 parts by weight   Extender pigment: 10 parts by weight   Photoinitiator: 5 parts by weight   Defoamer ・ ・ ・ ・ ・ ・ ・ ・ ・ 1 part by weight

Note that these proportions are optimum values obtained by experiments, and the proportion of the urethane acrylate that determines the hardness of the protruding portion 33 after solidification is 45 to 6
It has been experimentally determined that the amount can be changed within the range of 0 part by weight.

The acrylate monomer suppresses the curing of the urethane acrylate, and is easily poured into the opening 63 and does not flow out from the gap between the frame 51 and the sheet body 32 before solidification. Both the storage properties are achieved and, after solidification, the protrusion 3
Optimal values for imparting elasticity and flexibility to No. 3 have been obtained by experiments.

Further, the extender pigment secures fluidity for preventing clogging at the time of printing, and the content ratio thereof is determined by an experiment to find an optimum value when it is poured into the opening 63. There is.

In this embodiment, the resin precursor 71 which is cured by ultraviolet rays is used. However, the present invention is not limited to this. For example, a solvent-type, water-soluble, ultraviolet-curable one or two liquid type is used. You may use other resin precursors, such as a reaction hardening type.

In the third step (exclusion step), FIG.
As shown in FIG. 5, the squeegee 82 is moved along the upper surface 81 of the frame 51, and the resin precursor 71 surplus on the frame 51 is removed by the squeegee 82. As a result, the resin precursor 71 contained in the opening 63 is smoothed so as to be flush with the upper surface 81 of the frame 51.

In the fourth step (solidification step), FIG.
As shown in FIG. 5, ultraviolet rays 92 are irradiated from above the frame 51 by an ultraviolet lamp 91 (ultraviolet irradiation step), and the resin precursor 71 accommodated in the opening 63 of the frame 51 is irradiated with ultraviolet rays. As a result, the ultraviolet curable resin precursor 71 contained in the opening 63 is formed.
Begins to harden and solidifies. In this way, since the resin precursor 71 is cured by the ultraviolet rays, the thick protrusion 33
Even when forming, the solidification time can be shortened.

At this time, when the curing of the resin precursor 71 is started, as shown in FIG. 5, the volume of the resin precursor 71 becomes small, and the volume thereof decreases in a direction away from the inner side surfaces 101, 101 of the opening 63. The sheet 32 is also contracted in a direction away from it. However, since the sheet body 32 is formed thin, the sheet body 32 is deformed in the contracting direction of the resin precursor 71, that is, toward the inside of the opening 63, so that the state in which the resin precursor 71 is in close contact is maintained. .

In the fifth step (removing step), as shown in FIG. 3E, the sheet body 32 and the frame 51 are separated from each other, and the protrusion 33 formed by being solidified in the opening 63 is formed. Take out from the frame 51. Then, on the sheet body 32, a protrusion 33 having a thickness substantially the same as the thickness T of the frame 51 and having the same shape as the opening 63 is formed.

At this time, the frame 51 is made of a material that is hard to adhere to the resin precursor 71 to prevent the resin precursor 71 from being adhered, and the frame 5 is solidified when the resin precursor 71 is solidified.
1 is prevented from sticking. In addition, the sheet body 32,
By being formed into a sheet shape, the state in which it is in close contact with the resin precursor 71 is maintained. For this reason, in the state where the frame 51 and the sheet body 32 are separated, the protruding portion 33 formed by solidifying the resin precursor 71 is taken out from the opening portion 63 while being in close contact with the sheet body 32 side.

Then, in the sixth step (molding step),
As shown in FIG. 3F, the outer peripheral portion 11 of the sheet body
1 is cut into a square shape along each integrally formed protruding portion 33, .... As a result, the square-shaped base material 3
Mold 1.

In the present embodiment having the above-mentioned structure, when the heat exchanger 1 is formed, the heat exchanger 1 is formed in the heat exchange chamber 12 provided in the flow path of the ventilation device 11 through the above-mentioned steps. The formed base materials 31 are sequentially laminated. At this time, since the projecting portions 33, ... Are projectingly provided on each base material 31, the projecting portions 3, ... Inflow between the stacked base materials 31 ,. The path 42 or the outflow path 41 is formed.

As described above, the heat exchanger 1 having the inflow path 42 and the outflow path 41 can be constructed only by the sheet-like base material 31 having the protrusions 33, .... For this reason, the procurement cost of the member is suppressed as compared with the conventional case in which two members, a corrugated plate for securing the flow path and a flat plate for separating the flow path, had to be prepared. This makes it possible to manage inventory easily.

The base material 31 to be laminated has a partition wall formed by the projecting portion 33 for determining the flow direction in each flow path 41, 42. Therefore, while checking the extending direction of the protrusions 33, ...
It is possible to easily set the flow direction in the inflow path 42 and the flow direction in the outflow path 41, which are formed between the base materials 31, ... it can.

Therefore, due to the structure in which the flat plate is arranged between the corrugated plates that determine the flow direction in the inflow path 42 and the outflow path 41,
Compared to the conventional case in which the flow direction cannot be confirmed unless the flat plate is removed, the confirmation work with the flat plate removed becomes unnecessary, and the work efficiency can be improved. Therefore, the manufacturing work of the heat exchanger 1 is facilitated, and the manufacturing cost can be suppressed.

In the protruding portions 33, ..., The resin precursor 71 that can become the protruding portions 33 after solidification is the sheet body 3
It is integrally formed on the base material 31 by being applied and solidified on 2.

For this reason, special processing such as pressing is not required as compared with the conventional case in which a corrugated plate is used to define the flow path. This eliminates the need for capital investment such as press machines. Further, the base material 31 can be obtained without performing work such as adhering a flat plate to a corrugated plate that has been pressed. Therefore, the manufacturing cost can be reduced.

On the other hand, the sheet body 3 constituting the base material 31.
2 is formed of aluminum foil. That is, the sheet body 32 of the base material 31 that divides the inflow path 42 and the outflow path 41 and is responsible for the heat exchange portion is formed of a metal having a high thermal conductivity. As a result, the inflow route 4
The heat exchange efficiency between the fluid passing through 2 and the fluid passing through the outflow path 41 can be increased, and the heat exchanger 1 having a high heat exchange rate can be obtained.

Then, deterioration with time can be suppressed as compared with a conventional paper product. As a result, the durability can be improved, and the regular replacement as in the conventional case is unnecessary.

In addition, the conventional paper-made product has the required strength,
I needed something with a certain amount of thickness. However, in the present embodiment, the heat exchanger 1 itself can be formed in a very book-like film shape, so that it is possible to reduce the weight of the heat exchanger 1 itself and to improve the heat conduction efficiency due to the thinning.

In the present embodiment, the case where the base material 31 is formed by using the sheet body 32 made of aluminum foil has been described as an example, but the present invention is not limited to this. The sheet body 32 may be formed of paper that absorbs and discharges moisture.

In this case, even if there is a large humidity difference between the fluid passing through the inflow path 42 and the fluid passing through the outflow path 41, the humidity difference is adjusted by the sheet body 32 made of paper. be able to.

As a result, the indoor humidity can be maintained in the winter season when dry air flows in.

Further, in the present embodiment, the base material 3 in which the linear protruding portions 33, ...
The case where the heat exchanger 1 is formed by using 1 has been described as an example, but the present invention is not limited to this.

(Second Embodiment)

That is, as shown in FIG.
01 having a corrugated protrusion 202, ...
The heat exchanger 1 may be configured by stacking 03.

Even in this case, the same effect as that of the first embodiment can be obtained.

(Third Embodiment)

Further, as shown in FIG. 7, the sheet body 301
On both side edges of the straight projections 302, 3 forming a partition wall
02 may be extended, and a plurality of elliptical protrusions 303, ... Are provided between the protrusions 302, 302 to form the base material 304. As described above, even in the structure in which pebbles are randomly arranged in the stream, the same effect as described above can be obtained by forming the weir plate that does not leak air on the left and right side edges by the protrusions 302 and 302. be able to.

In addition, in the case of the second and third embodiments, the flow time until the fluid passes over the base materials 203 and 304 can be lengthened. Therefore, the heat exchange efficiency can be improved accordingly.

[0064]

As described above, in the heat exchanger according to claim 1 of the present invention, the inflow path and the outflow path are provided only by the sheet-like base material having the plurality of stacked protruding portions. A heat exchanger can be constructed. For this reason, the procurement cost of the member is suppressed as compared with the conventional case in which two members, a corrugated plate for securing the flow path and a flat plate for separating the flow path, had to be prepared. This makes it possible to manage inventory easily.

The base material to be laminated is provided with a protruding portion which determines the flow direction in the flow path. Therefore, while checking the extending direction of the protruding portion, etc., by simply stacking each base material, the flow direction in the inflow path and the flow direction in the outflow path formed between the base materials can be determined. Can be easily set in the cross direction.

Therefore, because of the structure in which the flat plate is arranged between the corrugated plates that determine the flow direction in the inflow path and the outflow path, the flow direction cannot be confirmed unless the flat plate is removed. Compared with the conventional method, the confirmation work with the flat plate removed becomes unnecessary, and the work efficiency can be improved.
Therefore, the manufacturing cost of the heat exchanger can be suppressed.

Further, in the heat exchanger according to the second aspect of the present invention, the base portion is formed by applying a precursor, which is capable of forming the projection portion after solidification, to the base material and solidifying the base material. It can be formed integrally with the material.

For this reason, special processing such as pressing is not required as compared with the conventional case in which a corrugated plate is used to define the flow passage. This eliminates the need for capital investment such as press machines. Further, the base material can be obtained without performing work such as adhering a flat plate to a corrugated plate that has been pressed. Therefore, the manufacturing cost can be reduced.

In the heat exchanger of claim 3, the inflow path and the outflow path are defined, and the base material that is responsible for the heat exchange portion is made of a metal having a high thermal conductivity.
Thereby, the heat exchange efficiency between the fluid passing through the inflow path and the fluid passing through the outflow path can be increased,
It is possible to provide a heat exchanger having a high heat exchange rate.

On the other hand, in the heat exchanger according to the fourth aspect, the base material for partitioning the inflow path and the outflow path is formed of paper that absorbs and discharges moisture. Therefore, even if there is a large humidity difference between the fluid passing through the inflow path and the fluid passing through the outflow path, the humidity difference can be adjusted by the paper base material.

As a result, when it is used in a house, the function of maintaining indoor humidity can be achieved in winter when dry air flows in.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a first embodiment of the present invention.

FIG. 2 is an explanatory view showing the ventilation device of the same embodiment.

FIG. 3 is a schematic view showing a manufacturing process of the base material of the same embodiment.

FIG. 4 is an explanatory diagram showing a frame used in the same embodiment.

FIG. 5 is a cross-sectional view of an essential part showing a state in which a protrusion is formed in the same embodiment.

FIG. 6 is a perspective view showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing a third embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional heat exchanger.

[Explanation of symbols]

1 heat exchanger 11 Ventilator 31 Base material 32 sheets 33 Projection 41 Outflow route 42 Inflow route 71 Resin precursor 202 protrusion 203 Base material 302 Projection 303 Elliptical protrusion 304 base material

Claims (4)

[Claims] 1. Heat exchange is performed between the inflow path and the outflow path that are stacked, and the flow direction of the fluid flowing through the inflow path intersects the flow direction of the fluid flowing through the outflow path. In the heat exchanger set to, a plurality of sheet-shaped base materials integrally provided with a plurality of protrusions are stacked to form the inflow path or the outflow path between the base materials, and A heat exchanger characterized in that a partition wall for blocking the flow of the fluid to the outside in the flow direction in the path is constituted by the projecting portion. 2. The heat exchanger according to claim 1, wherein a precursor capable of forming the protrusion after solidification is applied to the base material and solidified to form the projection portion on the base material. 3. The heat exchanger according to claim 1, wherein the base material is made of metal. 4. The heat exchanger according to claim 1, 2 or 3, wherein the base material is formed of paper.