JP3332994B2 - Method for producing material for heat exchanger element and method for producing heat exchanger element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger element having a structure in which sheet substrates are stacked in multiple stages, and a method for producing a material therefor.

[0002]

2. Description of the Related Art Maintaining the comfort of a living space and energy saving is the largest and ultimate theme of an air conditioner manufacturer, and a heat exchanger element is receiving attention as one of the leading methods.

As a heat exchanger element for simultaneously introducing outside air and discharging indoor air, a "cardboard-shaped" heat exchanger element is known.

This "corrugated cardboard-shaped" heat exchanger element comprises a plurality of single-faced cardboards each having a corrugated core and a flat liner bonded to one side of the corrugated core, such that the direction of the eyes is orthogonal to each other. It is configured to be laminated on. In this heat exchanger element, the corrugated core plays the role of a partition / spacer.

The original form of the heat exchanger element having such a configuration is disclosed in Japanese Patent No. 930986 (JP-B-47-19990).
It is believed that this is the heat exchanger disclosed in Japanese Patent Application Publication No. However, in the embodiment of this patent, a partition plate made of Japanese paper mixed with synthetic fibers is used as a flat liner,
A sawtooth-shaped spacing plate made of kraft paper or Kent paper is used as the one corresponding to the center of the waveform.

Japanese Patent Application Laid-Open No. 56-15828 discloses that a single-wave molded article obtained by bonding at least one of a flat sheet material and a corrugated sheet material with carbon fiber-containing paper and bonding the two sheet materials is laminated. A deodorizing element is shown in FIG.
The figure shows orthogonal elements. The invention of this publication is such that a conventional cylindrical or cross-flow heat exchanger element is provided with deodorizing properties.

Japanese Patent Application Laid-Open No. 56-16097 discloses that one of a flat sheet material and a corrugated sheet material is made of paper mixed with carbon fiber, and the other is paper, cloth, asbestos paper, synthetic paper, synthetic resin. A single-wave molded body used for manufacturing a deodorizing heat exchanger element which is formed of a sheet material such as a sheet, and which has a large number of small through holes formed by bonding these flat sheet material and corrugated sheet material is shown. . In this case, the other sheet material can be impregnated with a moisture absorbent. FIG. 2 of this publication shows a rotary heat exchanger element,
The figure shows orthogonal heat exchanger elements.

Although the above-mentioned "corrugated cardboard" heat exchanger element is widely used, a heat exchanger element in which a square rib-shaped linear spacer is provided on a flat sheet has also been proposed (Japanese Patent Laid-Open No. Sho 56). (See JP-A-12996, JP-A-3-17498, JP-A-3-113292 and JP-A-4-24492.)

[0009] and, more recently, as a development of the heat exchanger element of this "linear spacer type",
A "spacer-integrated mold" heat exchanger element has been proposed and is already being used in practice.

The "spacer-integrated mold" heat exchanger element is obtained by molding a linear spacer (rib) having a square rib shape integrally with a heat transfer plate using a resin. -286995 and JP-A-3-286.
No. 996.

[0011]

In the above-mentioned "corrugated cardboard" heat exchanger element, the partition walls or the spacers are made of a corrugated sheet material. In order to form such a corrugated sheet and to manufacture a single-wave corrugated cardboard structure using the corrugated sheet together with a flat sheet, a step-forming method using a corrugating machine is required industrially.

However , such a step-making method is
In order to be applicable to corrugating machines, the type of sheet material must be limited to those that have flexibility and shapeability suitable for step molding, and also have adhesive suitability (effectively limited to paper only) ), The size and pitch of the corrugated sheet are limited, so that the pressure loss cannot be reduced below a certain limit, and the shape and direction of the partition walls formed by the corrugated sheet are limited, so that the heat exchange efficiency is limited. There are problems.

[0013] In this respect, the "linear spacer type" heat exchanger element is advantageous in that it has less pressure loss than the "corrugated cardboard" heat exchanger element, and the sheet material can be selected in a wide range. However, it is still desirable to reduce the pressure loss and increase the heat exchange efficiency.

[0014] The "spacer-integrated mold" heat exchanger element is also of interest, but it is still desirable to reduce the pressure loss and increase the heat exchange efficiency, and this method has the disadvantage of significantly increasing the manufacturing cost. There is.

Under such a background, the present invention forms a spacer and a partition by a method completely different from the conventional one, so that the degree of freedom in selecting the material, the pressure loss is extremely small, and the heat exchange efficiency is excellent. Another object of the present invention is to provide a method for producing a heat exchanger element and a material therefor which are advantageous in cost.

[0016]

According to the method for producing a material for a heat exchanger element of the present invention, spacer sheets (2) are provided at least on one surface of a sheet substrate (1) in the form of lattice points, and the sheet substrate (1) is provided. a method of obtaining a phase opposite to the heat exchanger element material consisting of unit sheet (4) having a side edge of the two sides a structure in which partition wall piece (3) to the rib-like 1), wherein the space
The small piece (2) and the bulkhead piece (3) with a punched sheet material.
Forming and, at that time, the blank
The number and arrangement of the small pieces (2) and bulkhead pieces (3)
A wooden mold (5) equipped with a cylindrical blade (5a) and the arrangement of the blade (5a)
Push-in type (6) with push-rod (6a) in the right arrangement
And prepare a raw sheet (7) for punching
Only while receiving a sheet (8) hitting at the blade (5a) of said tree-type (5)
While punching, hold the punched body on the tip side of the blade (5a),
Then push in the push rod (6a) of the push-in die (6).
With this, the punched body held by the blade (5a) is
It is characterized by being pressed against and adhered to the substrate (1) .

The method for manufacturing the heat exchanger element of the present invention is as follows.
Characterized in that the overlapping stacking a large number of unit obtained by the above method the sheet (4), in multiple stages so that the direction of the partition wall member (3) of each unit sheet (4) is cross one by one is there.

Hereinafter, the present invention will be described in detail.

As the sheet base material (1), various materials such as paper, non-woven fabric, metal thin plate, ceramic thin plate, wood board, fiber board and the like are used, and the point that such a wide range of materials can be used. This is one of the features of the invention. As the sheet base material (1), use paper (kraft paper) or non-woven fabric that has moisture permeability for the purpose of total heat exchange, and high heat conductivity such as aluminum for the purpose of sensible heat exchange. It is preferable to select a thin metal plate. The size of the sheet substrate (1) can be set arbitrarily. For example, 115mm square or 180mm square for small ones, 2 for large ones
It can be set as 40mm square or 300mm square.

On at least one surface of the sheet substrate (1), spacer small pieces (2) are provided in the form of lattice points such as orthogonal lattice points or oblique lattice points.

The shape of each spacer piece (2) is circular, elliptical, oval, square, rectangular, rhombic, cross-shaped, star-shaped or the like in plan view. When the shape is elongated,
It is desirable that the longitudinal direction is parallel to a partition piece (3) described later. The height (thickness) of the spacer piece (2) can be arbitrarily set, but is often set to about 1 to 5 mm, especially about 1.5 to 3 mm.

The sheet base material (1) has ribs (3) near the two opposing side edges of the sheet base material (1) in addition to the spacer small pieces (2) described above. To be provided. The unit sheet (4) is constituted by providing the small spacer pieces (2) and the partition pieces (3) on the sheet base material (1) in this manner. The shape of the partition piece (3) is basically linear, but only the portion supporting the spacer pieces (2) of the upper and lower element materials (4) during stacking to maximize the heat transfer area It is desirable to use a bold line and the other portions to be a thin line.

The spacer piece (2) and the partition piece (3) can be made of various materials, but it is preferable to use a punched sheet made of the same material as the sheet base material (1). In a typical example, the sheet substrate (1) is formed of paper impregnated with a humidity control agent, and the spacer pieces (2) and the partition pieces (3) are formed of a cardboard punch.

In the present invention, the above sheet
Material punched sheet substrate making and stamping of (1)
Is fixed as follows . That is, a wooden mold (5) having a cylindrical blade (5a) corresponding to the number and arrangement of the punched bodies (spacer pieces (2) and partition pieces (3)), and the blades thereof.
Prepare a push-in die (6) with a push-in rod (6a) arranged in accordance with the arrangement of (5a), and hold the raw sheet (7) for punched body production with the blade receiving sheet (8) as described above. Wood pattern (5)
The punched body is held by the blade (5a) by holding the punched body at the tip side of the blade (5a), and then pushing out the pushing rod (6a) of the pushing die (6). The punched body is pressed against the sheet substrate (1) and adhered. Note that an adhesive is applied in advance to the places where the spacer pieces (2) and the partition pieces (3) of the sheet base material (1) are installed by screen printing. Further, it is desirable to provide an elastic body (5b) on the outer periphery of the tip side of the blade (5a) of the wooden mold (5).

After the unit sheets (4) are obtained as described above, a large number of the unit sheets (4) are stacked in multiple stages such that the directions of the partition pieces (3) of each unit sheet (4) cross each other. Thus , a desired heat exchanger element is produced. When stacking, remove the spacer pieces of the lower unit sheet (4).
Adhesive is applied to the upper surfaces of (2) and the partition (3), and the spacers (2) of the upper and lower sheet substrates (1) are pressed together so that the small pieces (2) of the upper and lower sheet bases overlap each other in plan view. I do.

Spacer small pieces (2) on both sides of the sheet substrate (1)
When forming the partition pieces (3), the spacer pieces (2) on the upper surface of the lower sheet material (1) and the spacer pieces (2) on the lower surface of the lower sheet material (1) are stacked. Care should be taken to overlap in abutting condition.

The heat exchanger element obtained by the method of the present invention is useful as a total heat exchanger or a sensible heat exchanger. When used as a total heat exchanger, a sheet material (1) having moisture permeability should be selected, and a humectant (calcium chloride, lithium chloride,
Superabsorbent resin, thermosetting resin microspheres, silica gel, zeolite, activated carbon, etc.), deodorant (plant-derived deodorant components, organic acids, semicarbazide salts, activated carbon, aromatics, etc.), antibacterial agent, etc. Keep it. When used as a sensible heat exchanger, a material having as high a thermal conductivity as possible is selected as the sheet substrate (1).

[0028]

When the heat exchanger element shown in FIG. 4 described later is used as the total heat exchanger element, the sheet base material (1)
Using a material having moisture permeability, warm air in the room flows from the upper side of the paper of FIG. 4 to the rear side of the paper, and
Cool outdoor air flows from the right side to the left side in FIG.
The warm air in the room flows through the gaps between the spacer pieces (2) of the even-numbered unit sheets (4), and the cool air from the outside flows between the spacer pieces (2) of the odd-numbered unit sheets (4). Flows through the void. In the meantime, total heat exchange (temperature exchange and humidity exchange) is performed between the two airflows.

When the heat exchanger element shown in FIG. 4 is used as a sensible heat exchanger element, a high heat conductive material such as an aluminum thin plate is used as the sheet substrate (1).
Warm air in the room flows from the upper side in FIG. 4 to the rear side in the figure, and cool outdoor air flows from the right side to the left side in FIG. The warm air in the room flows through the gap between the spacer pieces (2) of the even-numbered unit sheets (4),
Cold air from the outside flows through the gaps between the spacer pieces (2) of the odd-numbered unit sheets (4). In the meantime, sensible heat exchange (temperature exchange) is performed between the two airflows.

[0030] Then, in the aforementioned unit sheet (4), since the spacer piece (2) is provided on the lattice points, the pressure loss is extremely small, and is excellent heat exchange efficiency.
In addition, since it has a simple structure, it is advantageous in terms of cost.

[0031]

BRIEF DESCRIPTION OF then to examples, obtained by the method of the present invention
The heat exchanger elements used will be further described. Incidentally, the embodiment described below are illustrative of the case of the total heat exchanger element, sensible heat exchange elements also, the selection of the base sheet (1), by changing the other conditions as appropriate, to produce in a similar manner be able to.

Embodiment FIG. 1 is a plan view showing an example of a unit sheet (4) which is a material for a heat exchanger element obtained by the method of the present invention. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG.
It is sectional drawing. FIG. 4 is a front view showing an example of a heat exchanger element obtained by the method of the present invention. FIG.
FIG. 4 is an explanatory view showing a part of the manufacturing process of the unit sheet (4) according to the method of the present invention .

(4) is a unit sheet, and a sheet substrate (1)
17 pieces of circular spacer pieces (2) having a diameter of 8 mm and a thickness of 2 mm (17) are adhesively fixed on one side of a kraft paper supporting calcium chloride having a thickness of 130 μm as an example in an oblique lattice point shape, and the sheet substrate ( 1) Each of the two opposing side edges of (1) has a configuration in which a partition piece (3) having a narrow width of 5 mm and a wide width of 8 mm is bonded and fixed in a rib shape.

FIG. 4 shows that the unit sheets (4) of FIGS. 1 to 3 are laminated and bonded in multiple stages (for example, 150 stages or 240 stages) so that the direction of the partition pieces (3) cross each other. This is a heat exchanger element in which kraft paper supporting calcium chloride is laminated and adhered to the top stage as a top plate.

The unit sheet (4) and the heat exchanger element were manufactured according to the following steps. 1. A roll of kraft paper having a basis weight of 75 g / m ² is impregnated with an aqueous solution of calcium chloride and then dried to carry 14 g / m ² of calcium chloride as a pure component. This kraft paper supporting calcium chloride is used as a raw material for the sheet substrate (1). 2. The above 1 sheet is slit to a width of 180 mm. 3. The raw material subjected to the slit processing in the above 2 is cut into a length of 180 mm to obtain a sheet substrate (1) having a size of 180 mm × 180 mm. 4. A polyvinyl acetate-based adhesive is printed in a predetermined pattern on the sheet base material (1) by the screen printing method. 5. A thick paper having a width of 200 mm and a thickness of 2 mm is punched out with a wooden mold (5) having a cylindrical blade (5a). At this time, cardboard and blade support sheet
(8) (2mm thick rigid polyvinyl chloride sheet or polycarbonate sheet) shall be automatically fed. The punched body after the punching is held on the tip side of the blade (5a). 6. The above-mentioned sheet base material (1) on which an adhesive is pattern-printed
After aligning the above 5 wood mold (5) (with the punched body held on the tip side of the blade (5a)), place it on the adhesive pattern of the sheet base (1). The punched body is adhesively fixed. 7. For each unit sheet (4) completed in 6 above, a polyvinyl acetate-based adhesive is roll-coated on the upper surface of the punched body fixed and bonded. Note that two sets of the above 3 to 6 are required to be orthogonal. 8. Unit sheet completed in step 6 and prepared in step 7
(4) are laminated and bonded one by one so as to be orthogonal to each other to form a heat exchanger element. 9. A predetermined number of stacked blocks are taken out, kraft paper is arranged as a top plate on the top, and a frame is attached to complete the heat exchanger element. 10. After 9 above, inspection and packing are performed. In addition , the above 3-
Step 8 is an integrated processing facility.

Steps 5 and 6 are performed as shown in FIG.
As shown in (b), (c) and (d), the procedure was performed as follows.

<FIG. 5 (a)> A wooden mold (5) having a cylindrical blade (5a) corresponding to the number and arrangement of the punched bodies (spacer pieces (2) and partition pieces (3)).
And the push rod (6a) arranged in accordance with the arrangement of the blade (5a)
A press-in die (6) provided with. Blade (5) of wooden mold (5)
An elastic body (5b) is provided on the outer periphery on the tip side in a).

<FIG. 5 (b)> A raw sheet (7) for manufacturing a punched body is used as a blade receiving sheet (8).
And punch it with the blade (5a) of the wooden mold (5).

<FIG. 5 (c)> The punched body is held on the tip side of the blade (5a).

<FIG. 5 (d)> By pushing out the push rod (6a) of the push die (6), the punched body held by the blade (5a) is made into a sheet base material.
(1) Press to adhere. An adhesive is applied in advance to the place where the spacer small piece (2) and the partition piece (3) of the sheet substrate (1) are installed by screen printing.

[0041]

According to the method of the present invention, an entirely different method is used.
Spacers and partition walls are formed by the method.
Therefore, the degree of freedom in selecting the material is large.

In the heat exchanger element obtained by the method of the present invention, a unit sheet (4), which is a material for the heat exchanger element, in which spacer pieces (2) are provided in a lattice point is used. Therefore, the pressure loss is extremely small and the heat exchange efficiency is excellent. Further, since the structure is simple, it is advantageous in terms of cost.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a unit sheet (4) which is a material for a heat exchanger element obtained by a method of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a front view showing an example of a heat exchanger element obtained by the method of the present invention.

FIG. 5 is an explanatory view showing a part of the manufacturing process of the unit sheet (4) according to the method of the present invention .

[Explanation of symbols]

(1) ... sheet base material, (2) ... spacer piece, (3) ... partition piece, (4) ... unit sheet, (5) ... wooden mold, (5a) ... blade, (5b) ...
Elastic body, (6)… Push type, (6a)… Push rod, (7)…
Raw sheet, (8)… blade receiving sheet

Claims (2)

(57) [Claims] 1. A space on at least one side of a sheet substrate (1).
A small piece (2) is provided in the form of a lattice point, and
Partition ribs (3) are provided in ribs on the two opposite side edges of (1).
Heat exchanger element consisting of unit sheets (4)
MaterialsA method of obtaining The spacer piece (2) and the partition piece (3) are punched with a sheet material.
Forming with a punched body, and at that time, Of the blank (2) and the partition (3)
Wood mold (5) with cylindrical blade (5a) commensurate with number and arrangement
And the push rod (6a) arranged in accordance with the arrangement of the blade (5a)
Prepare a push-in type (6) with Raw sheet (7) for punched body production
While punching with the blade (5a) of the wooden mold (5) while receiving
Then, hold the punched body on the tip side of the blade (5a), Then push in the push rod (6a) of the push-in die (6).
With this, the punched body held by the blade (5a) is
Pressing and bonding to the substrate (1) A method for producing a material for a heat exchanger element, comprising: Wherein a large number of unit sheet obtained by the method of claim 1 (4), the direction of the partition wall member (3) of each unit sheet (4) is superimposed stacked in multiple stages so as to cross one by one A method for manufacturing a heat exchanger element .