JP6893686B2 - High-performance low-voltage loss static total heat exchange element manufacturing method - Google Patents

Description

The present invention relates to a orthogonal flow type total heat exchange element used, for example, for recovering heat energy when ventilating during heating and cooling, and for total heat exchange of gas flows having different temperatures.

Conventionally, the orthogonal flow type total heat exchanger recovers the sensible heat energy when ventilating during heating and cooling, and returns the moisture. For this reason, the air passages are blocked with breathable paper so that moisture can move between the two air passages.

Hereinafter, an example of a conventional orthogonal flow type total heat exchanger will be described with reference to the drawings. FIG. 5 is a perspective view of a conventional orthogonal flow type total heat exchange element. In FIG. 5, reference numeral 1 denotes a liner sheet, which is made of breathable flame-retardant paper or the like and has a flat shape.

A few are corrugated sheets, which are also breathable flame-retardant papers and are corrugated. The corrugated sheets 2 and 3 are joined via the liner sheet 1, and the directions of the waves are orthogonal to each other.

As a result, an air flow passage that is orthogonal to each other and is blocked by the liner sheet 1 is formed. When the temperatures of the air flowing through the air flow passages are different, sensible heat exchange is performed via the liner sheet 1.

Further, since the liner sheet 1 has moisture permeability, when the absolute humidity of the air flowing through each air flow passage is different, the humidity is exchanged through the liner sheet 1. In this way, the total heat exchange of the air flowing through each air flow passage is performed.

The total heat exchange element used in such a orthogonal flow type total heat exchanger is manufactured by a molding machine such as a single facer device as disclosed in FIG. 3 of Patent Document 1.

Further, as a method for manufacturing different total heat exchange elements, as disclosed in FIG. 1 of Patent Document 2, synthetic resin fins (ribs) are formed in parallel on a flat plate, injection molding or vacuum forming. There is a product that manufactures a flat plate with ribs made of resin.

Japanese Unexamined Patent Publication No. 2011-163650 Special Fair 6-55442 Gazette

What is disclosed in Patent Document 1 is that in the case of paper such as flame-retardant paper, the corrugated is merely a spacer and becomes a ventilation resistance. The contact area between the corrugated liner and the liner has a width of about 1.6 mm when the pitch (length of the corrugated peaks and valleys) is 4.1 mm, and this part is made of double-layered paper and is made of adhesive. Since it is glued, it does not contribute to total heat exchange. Further, a triangular narrowed portion is formed in the vicinity of the contact portion between the corrugated and the liner, and this portion has a problem that the contribution to the total heat exchange performance is weak and the air flow resistance.

The one disclosed in Patent Document 2 and the like has a problem that the resistance of the air flow increases because the thickness of the corrugated and the liner cannot be reduced.

The present invention has been made to solve the above problems, and a sheet having moisture permeability and gas blocking property is double-folded in a valley-mountain-valley to form a rib. It is an object of the present invention to provide a total heat exchange element having high heat exchange performance and low air flow pressure loss by using a plurality of ribs at equal intervals and formed on the entire surface of a required sheet.

In the present invention, a single corrugated cardboard (liner) is formed by forming ribs on a moisture-permeable and gas-blocking sheet by inserting a plurality of folds at equal intervals to form a orthogonal flow type total heat exchange element. The most important feature is to make a molded body (stage processed product) for a total heat exchange element that functions as (+ corrugated).

In the orthogonal flow type total heat exchange element of the present invention, ribs are formed by inserting a plurality of folds at equal intervals into a sheet having moisture permeability and gas blocking property, and the sheet on which the plurality of ribs are formed is formed into ribs. While applying an adhesive to the tip of the element, the total heat exchange element is manufactured by laminating each step so as to be orthogonal to each other. This has the advantage that the heat exchange performance is improved as compared with the conventional total heat exchange element, and the pressure loss of the air flow is reduced.

Further, as compared with the conventional orthogonal flow type total heat exchange element as shown in FIG. 5 disclosed in FIG. 1 of the cited document 1, it is possible to reduce the cost by reducing the amount of the sheet used. It was.

FIG. 1 is a perspective view of the orthogonal flow type total heat exchange element of this embodiment. FIG. 2 is a diagram showing a configuration of a molding machine for producing a honeycomb molded product for a orthogonal flow type total heat exchange element of this embodiment. FIG. 3 is a perspective view of a molded product molded by the molding machine of this embodiment. FIG. 4 is a perspective view of the molded product before being laminated at right angles in this embodiment. FIG. 5 is a perspective view of a conventional orthogonal flow type total heat exchange element.

In the present invention, a single cardboard (liner) is formed by forming ribs on a moisture-permeable and gas-blocking sheet by inserting a plurality of folds at equal intervals to form a orthogonal flow type total heat exchange element with one sheet. By making a molded body (staged product) for a total heat exchange element (+ corrugated) shape, the heat exchange performance is improved compared to the conventional total heat exchange element, and the purpose of reducing the pressure loss of the air flow is realized.

Hereinafter, a perspective view of a orthogonal flow type total heat exchange element according to an embodiment of the present invention is shown in FIG. Reference numeral 4 denotes a orthogonal flow type total heat exchange element of this embodiment. The orthogonal flow type total heat exchange element 4 is a honeycomb molded product 6 having ribs 5 formed by a plurality of folds made of a sheet having moisture permeability such as flame-retardant paper and gas blocking property, and the ribs 5 have an angle of 90. Manufactured by laminating in a direction that intersects at right angles and joining with an adhesive. By flowing air flows in different states of the outside air OA and the return air RA through the first air flow path 7 and the second air flow path 8 formed by the ribs 5, the partition portion 9 of the honeycomb molded product 6 is used as a medium. As a result, sensible heat and latent heat are exchanged between the outside air and the return air.

FIG. 2 shows a configuration of a molding machine for stepping the honeycomb molded product 6. The molding machine sends the moisture-permeable and gas-blocking sheet 10 to the caterpillar-shaped (track-shaped) forming belt 11 that forms a fold of the rib 5 that drives between the rotating roller A and the rotating roller B, and at the same time. While rotating, the sheet 10 is pushed into the concave portion 12 of the forming belt 11 formed by the rotating roller A portion by the convex portion 14 of the forming roller 13. At this time, the adhesive stored in the adhesive container 15 is applied to the convex portion 14 by the two adhesive rollers 16. The sheet 10 woven into the concave portion 12 in a folded mountain shape is adhered with an adhesive to form a rib 5, passes through a pressing roller 17, and becomes a honeycomb molded product 6 and comes out of the molding machine.

FIG. 3 shows a honeycomb molded product 6 which has been step-processed by a molding machine. As shown in FIG. 3, the honeycomb molded product 6 is cut to a size suitable for manufacturing the orthogonal flow type total heat exchange element 4. Further, the rib 5 is formed, and since the sheet 10 is doubled and adhered with an adhesive in this portion, it does not contribute to total heat exchange, but the partition portion 9 contributes to total heat exchange. Further, the rib 5 has a reinforcing effect because the sheet is doubled and adhered, and even if a sheet as thin as possible is used for the purpose of improving heat exchange performance and reducing cost, the strength required as a heat exchange element can be obtained. It also has the effect of being able to do it.

As shown in FIG. 4, the cut honeycomb molded product 6 is laminated so as to be orthogonal by rotating each step at an angle of 90 degrees while applying an adhesive to the tip of the rib 5, and orthogonal flow type total heat exchange. The element 4 is manufactured. In this embodiment, the ribs 5 formed by the ridges of the sheet 10 are set at equal intervals, and the ribs 5 are rotated and laminated at an angle of 90 degrees for each step, but the present invention is not limited to this. The ribs 5 do not have to be evenly spaced, and the angle of rotation for each step does not have to be 90 degrees.

A comparison is made between the orthogonal flow type total heat exchange element 4 of FIG. 1 and the conventional example of the corrugated type orthogonal flow type total heat exchange element of FIG. 5 configured as described above. In the conventional example of FIG. 5, one step is formed by combining the liner sheet 1 of the moisture permeable sheet and the corrugated corrugated sheets 2 and 3. In a metal orthogonal flow type heat exchange element, the corrugate functions as a heat transfer fin, but in the case of paper, it does not function as a heat transfer fin because the heat conductivity is not good, and the corrugate is just a spacer and acts as a ventilation resistance. It just becomes. Further, the contact portion between the corrugated sheets 2 and 3 and the liner sheet 1 has a width of about 1.6 mm when the pitch is 4.1 mm, for example, and this portion has a double sheet and is adhered with an adhesive. Therefore, it does not contribute to total heat exchange. Further, a triangular constricted portion is formed in the vicinity of the contact portion between the corrugated sheet 1 and the liner sheets 2 and 3, and this portion has a weak contribution to the total heat exchange performance and is an air flow resistance.

On the other hand, in the present embodiment of FIG. 1, the area of the wall that cuts the flow path is reduced to less than half, and the constricted portion is not formed, so that the pressure loss is significantly reduced. In this embodiment, the bonding area of the rib 5 that supports the partition portion 9 as a liner is the minimum area, and the total heat exchange performance due to humidity transmission is maximized. In addition, the minimization of the spacer portion (corrugate) also minimizes the raw material sheet, which contributes to cost reduction.

In comparison when the heights between the liners are the same, the pressure loss ΔP can be reduced by about 80%, and the required length of the sheet can be reduced by about 20%. According to a trial calculation, the performance should be the same if the contact adhesion between the corrugated and the liner is not expected, but the performance can be expected to improve because the contact adhesion is less than half. Comparing with the configuration that combines the amount of sheets used, when the stacking height is 2.1 mm in the conventional example, the heat exchange area is 1.5 times as large as 1.4 mm in this example, and the total heat exchange performance (total). The heat exchange efficiency) is improved from 45% in the conventional example to 50 to 58% in this embodiment, but the pressure loss ΔP is conversely reduced by about 60%. Table 1 shows a comparison table between the conventional example and the present embodiment (same liner height: height 2.1 mm, same sheet length: height 1.4 mm).

以上のように、本実施例の成形機によるハニカム成形品で構成された直交流型全熱交換素子を使うことによって、従来の直交流型全熱交換素子と比較して、全熱交換性能の向上、圧力損失の低減、原料シート使用量減少によるコストダウンが可能となる。なお、本実施例では、難燃紙など透湿性が有り、ガス遮断性の有るシートを用いたが、これに限定されるものではなく、透湿性が無いシートを用いることにより直交流型顕熱交換素子にも使用できる。

As described above, by using the orthogonal flow type total heat exchange element composed of the honeycomb molded product by the molding machine of this embodiment, the total heat exchange performance is improved as compared with the conventional orthogonal flow type total heat exchange element. It is possible to improve, reduce pressure loss, and reduce costs by reducing the amount of raw material sheet used. In this embodiment, a sheet having moisture permeability and gas blocking property such as flame-retardant paper was used, but the present invention is not limited to this, and a sensible heat of orthogonal flow type is used by using a sheet having no moisture permeability. It can also be used for interchangeable elements.

In the present invention, by using a sheet having a thickness sufficient for origami forming as described above, having moisture permeability, and having gas blocking property, the total heat exchange performance is high and the total heat of the orthogonal flow type having low pressure loss is low. The exchange element can be provided at low cost. Further, by using a metal thin film having no moisture permeability such as aluminum foil and having a gas blocking property, it is possible to provide a sensible heat exchange element having high heat exchange performance and low pressure loss at low cost.

1 Liner sheet 2, 3 Corrugated sheet 4 Orthogonal flow type total heat exchange element 5 Rib 6 Honeycomb molded product 7 First air flow path 8 Second air flow path 9 Partition 10 Sheet 11 Molding belt 12 Recess 13 Molding roller 14 Convex part 15 Adhesive container 16 Adhesive roller 17 Presser roller A, B Rotating roller

Claims (1)

A single sheet having a gas-blocking property is formed by laminating a plurality of molded bodies in which ribs as spacers are formed by providing a plurality of folded ridges at the same height at predetermined intervals in a plurality of stages. A method for manufacturing a honeycomb-shaped molded product, which is a constituent member of a orthogonal flow type heat exchange element in which the molded product and an even-numbered molded product are laminated so as to have a predetermined angle with each other. However, an adhesive is attached to the sheet in the concave portion formed in the contact portion between the infinite orbital forming belt driven between the two rotating rollers and the rotating roller of the forming belt, and the convex portion of the forming roller is formed. A method for producing a honeycomb-shaped molded product, which comprises forming ribs on the entire surface of the sheet by pushing it in.

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