JPS6154928A - Manufacture of cylindrical type heat exchanger - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a cylindrical heat exchanger used as a heat recovery device.

Conventional configurations and their problems One of the types of heat exchangers conventionally used in heat recovery devices and the like is one that uses a rotating rotor as an element. There are various structures of the rotor elements. For example, in the case of a rotary total heat exchanger that reduces hot air during ventilation, a co- or rugate-like material made by superposing a flat sheet 1 and a corrugated sheet 2 is mainly used as a vortex as shown in FIG. .

There are those that are wound into a coil to form a cylindrical heat exchanger, and those that use metal wire or hygroscopic natural fibers formed into a network structure as the heat exchange medium, but both are expensive. , only simple air channels can be created within the element. 1. Purpose of the Invention The present invention takes into consideration the above-mentioned conventional problems, and aims to establish a method for manufacturing a cylindrical heat exchanger that is simple and suitable for automation, and to reduce costs.゛Structure of the Invention To achieve the above-mentioned object, the present invention provides a method for manufacturing a cylindrical heat exchanger, which includes the following steps: (a) applying an adhesive in a predetermined pattern on a flat sheet and then drying it; The process of overlapping different sheets, (→
This manufacturing method includes the steps of thermocompression bonding the stacked sheets, and (d) developing the thermocompression bonded sheets around their ends to form a cylindrical matrix. This makes automation easier and reduces the cost of the heat exchanger.

Furthermore, by changing the adhesive application pattern, when developed into a cylindrical shape, the opening areas of the air passages on the outer circumferential side and the inner circumferential side can be equalized, and heat exchange efficiency can be improved.

Description of examples An example of the present invention will be explained below based on the drawings.

FIG. 1 is an explanatory diagram schematically showing an example of a manufacturing method for agricultural production of a honeycomb type cylindrical heat exchanger. 3 in the figure is a coater that applies an adhesive to a sheet of kraft paper 4, and the adhesive used in this case is polyester. The adhesive application pattern in this example is pattern A and B in Figure 2. In step d, the adhesive is applied so that the distance between the non-bonded parts becomes wider from the outer circumference side to the inner circumference side of the cylindrical shape. do. In the figure, 6 and 6 are locations (patterns) where adhesive is applied. As the coater 3 rotates, the putters 7 shown in FIGS. 2A and 2B are alternately printed on the craft paper 4. This printed kraft paper 4 is dried in a drying oven 7.
Continuously pass through. After drying, both patterns A and B shown in FIG. 2 are cut out using a cutting machine 8 and laminated one after another by a laminating machine 9.

Next, as shown in Fig. 3A, the required number of laminates 11 are sandwiched between galvanized iron plates or aluminum plates 12 and 13 at the top and bottom, and pressure is applied from the top and bottom using a press 10 to press them at an angle of 150°.
After being left in a heating furnace with a C atmosphere for about 15 minutes, it was allowed to cool naturally.

If this is further developed with one end as an axis as shown in Figure 3 and C, and aluminum plates 12 and 13 are fixed, a cylindrical heat exchanger as shown in Figure 4 will be completed. In the figure, 14 is a rubber sheet spread around the outer periphery of the cylinder, and 15 is a hole into which the rotating shaft of the cylindrical heat exchanger is inserted.

In this embodiment, kraft paper is used as the material for the element, but it may also be made of a plastic sheet or a metal foil such as aluminum foil.

FIGS. 5A and 5B are alternative embodiments of adhesive application patterns. In this case, the adhesive application (turn is done in step d)
In this step, adhesive is applied to the craft paper 4 such that the distance between the bonded portions and the distance between the non-bonded portions increases from the outer circumferential side to the inner circumferential side of the cylinder.

Further different embodiments will be described with reference to FIGS. 6 and 7. As shown in FIGS. 6A and 6H, a flat sheet 16 has a cut portion 18 in a part and is bonded with an adhesive.
17 are stacked alternately around the shaft 15 at the end in sets of 8, thermocompression bonded, and expanded to form a cylindrical heat exchanger as shown in FIG. The distance between the adhesive patterns on 16.17 (flat sheet) is wider closer to the axis 16, but this is to equalize the opening area of the air passage on the inner and outer circumferential sides during deployment. be. The cut 18 becomes the cavity 19, 20 in FIG. At the end of the cylindrical heat exchanger, shielding portions 21 and opening portions 22 are formed alternately. As a result, a ventilation circuit as shown in FIG. 8 can be formed.

In the above embodiments, the cylindrical heat exchanger is constituted by a single developed body, but as shown in FIG. 8, a plurality of developed bodies, for example 23 and 24 are used.

25 may constitute one cylindrical heat exchanger with the shaft 15 as the center.

Effects of the Invention As mentioned above, the manufacturing method using the sheet lamination method is easy to automate, so it is not only possible to reduce the cost of elements, but also to create various air channels by changing the printing pattern of the adhesive. A cylindrical heat exchanger can be made.

In addition, when the laminated sheet is developed around the axis 16, the gap between the non-adhesive parts of the coating pattern increases from the outer circumferential side to the inner circumferential side. Since the areas are equal and the airflow distribution is uniform, heat exchange efficiency is improved.

Furthermore, by increasing the area of the bonded portion, the peel strength also increases.

[Brief explanation of the drawing]

Figures 1 to 8 relate to embodiments of the present invention; Figure 1 is an explanatory diagram of the manufacturing process of a cylindrical heat exchanger, Figure 2 is a diagram of the adhesive application pattern on kraft paper, Figure 3 is a diagram showing the process of rolling out one end of a laminated and pressure-bonded kraft paper sheet to form a cylindrical heat exchanger. Figure 4 is a perspective view of the cylindrical heat exchanger shown in Figure 3C. Figure 5 is a diagram of an adhesive application pattern of a different embodiment, Figure 6 is a diagram of an adhesive application pattern of a further different embodiment, and Figure 7 is a diagram of a cylindrical heat exchanger formed with the adhesive application pattern shown in Figure 6. Fig. 8 is an external view of a cylindrical heat exchanger according to a different embodiment of the present invention, and Fig. 9 is a schematic external view of an example of a conventional cylindrical heat exchanger. 3...Coater, 4...Flat sheet, 5
,6゜16.17...Adhesive application pattern, T
...Drying oven, 8...Cutting machine, 9...
... Laminating machine, 10... Heat press, 11...
... Laminate of flat sheets coated with adhesive, 12.1
3... Galvanized iron plate or aluminum plate, 14...
...Rubber sheet, 16...Hole for rotation @, 1
8.19.20...Cut part, 21...
・Bush part, 22... Opening part, 23, 24.25
・・・・・・Development body. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure @2. C) (B7 4vI Figure 5 [A+ (B) Figure 6 Figure 8 Figure 9

Claims (6)

[Claims] (1) Step a of applying adhesive to a flat sheet in a predetermined pattern and then drying; step b of overlapping sheets with different application patterns; step c of hot-pressing each of the overlapping sheets; and laminating the sheets by hot-pressing. A method for manufacturing a cylindrical heat exchanger comprising step d of unfolding a sheet around one end thereof to form a cylindrical matrix. (2) Change the adhesive application pattern in step a to step d.
2. The method of manufacturing a cylindrical heat exchanger according to claim 1, wherein the adhesive is applied so that the distance between the non-bonded parts becomes wider from the outer circumferential side to the inner circumferential side of the cylinder. (3) Change the adhesive application pattern in step a to step d.
The cylindrical heat exchanger according to claim 1, wherein the adhesive is applied so that the interval between the bonded parts and the interval between the non-bonded parts becomes wider from the outer circumferential side to the inner circumferential side of the cylinder. How to make the utensils. (4) The method for manufacturing a cylindrical heat exchanger according to claim 1, which includes a step of partially cutting a flat sheet before step b. (5) The method for manufacturing a cylindrical heat exchanger according to claim 1, comprising the step of combining a plurality of the developed bodies. (6) The method for manufacturing a cylindrical heat exchanger according to claim 1, which comprises a step of treating the plane sheet itself or the surface of the plane sheet of the cylindrical heat exchanger with a moisture absorbent.