JPH0741271U - Heat exchange element - Google Patents

Abstract

(57) [Abstract] [Purpose] The partition part can be reliably and easily adhered to the sheet over the entire length in the longitudinal direction, and the heat exchange efficiency when used as a heat exchanger can be improved. To do. [Structure] The heat exchange element 11 includes a heat exchange sheet 12 made of Japanese paper, and six hot-melt type adhesives 14 applied on the sheet 12 in a streak shape and cured. It is composed of a partition section 13. Since the partition 13 is bonded to the sheet 12 by the adhesive force of the adhesive 14 itself, the partition 13 can be bonded reliably and easily over the entire length in the longitudinal direction.
Further, since it is not necessary to impregnate the sheet 12 with resin, it is possible to improve the heat exchange efficiency when the sheet 12 is used as a heat exchanger by using the sheet 12 not impregnated with resin.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchange element used in a heat exchanger such as an air conditioning ventilation fan.

[0002]

[Prior art]

 As this type of heat exchange element, for example, one having a configuration shown in FIGS. 5 and 6 is considered. This heat exchange element 1 uses a Japanese paper impregnated with polypropylene resin as a heat exchange sheet 2 and uses a plurality of straws 3 made of polyethylene as a partition part, and each straw on one side of the sheet 2. 3 is heated and fused. In FIG. 6, 4 indicates a fusion point.

In this case, the heat fusion is performed by using a roller-type heater (not shown) on the surface of the sheet 2 opposite to the side on which the straw 3 is arranged (lower surface in FIGS. 5 and 6). The polypropylene resin contained in the sheet 2 is melted by pressing and heating in the direction orthogonal to the longitudinal direction of 3 and the straws 3 are fused to the sheet 2 through the molten layer of the resin. There is. In addition, in FIG. 5, 5 is a portion against which a roller-type heater is pressed, and is shown by a broken line for convenience.

By laminating a large number of heat exchange elements 1 having such a configuration with the longitudinal direction of the straw 3 being alternately different by 90 degrees, heat of a cross flow type having two orthogonal flow paths is laminated. An exchange is constructed. At this time, each straw 3 has a function of securing a space between the vertically stacked sheets 1 and 1 and dividing the space into a plurality of spaces to form a flow path.

[0005]

[Problems to be solved by the device]

 However, the conventional configuration described above has the following drawbacks. Since each straw 2 is only adhered to the sheet 1 by heat fusion intermittently, the adhesive strength of the straw 2 is weak, and a gap is likely to be formed between the straw 2 and the sheet 1. Moreover, since the sheet 1 is made of Japanese paper impregnated with resin, there is a drawback that the heat exchange efficiency is deteriorated when it is used as a heat exchanger.

Therefore, an object of the present invention is to reliably and easily bond the partition part to the sheet over the entire length in the longitudinal direction, and to improve the heat exchange efficiency when used as a heat exchanger. The purpose of the present invention is to provide a heat exchange element which can be designed.

[0007]

[Means for Solving the Problems]

 The heat exchange element of the present invention comprises a heat exchange sheet and a plurality of partition portions provided by applying a molten state heat-meltable resin on the sheet in a streak shape and curing it. It is configured to have.

In this case, it is preferable that the partition portion is formed by mixing gas into the resin when the heat-meltable resin is applied to the sheet.

[0009]

[Action]

 According to the above-mentioned means, the partition portion is bonded to the sheet by the adhesive force of the heat-meltable resin itself, so that the partition portion can be reliably and easily bonded to the sheet over the entire length in the longitudinal direction. can do. Further, since it is not necessary to impregnate the sheet with resin, it is possible to improve the heat exchange efficiency when used as a heat exchanger by using a sheet not impregnated with resin.

The partition portion is formed by mixing a gas into the heat-fusible resin when the sheet is coated with the heat-fusible resin, so that the volume of the partition portion can be increased, and the heat-fusible resin can be increased. It is possible to reduce the use amount of.

[0011]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the appearance of one heat exchange element 11. The heat exchange element 11 is composed of a heat exchange sheet 12 having a rectangular shape, and six linear partition portions 13 provided on the sheet 12 in a parallel state.

Here, the sheet 12 is made of, for example, Japanese paper, and is not impregnated with a synthetic resin such as polypropylene resin. On the other hand, each partition 13 has a structure in which a heat-meltable resin, in this case, a hot-melt type adhesive 14 is linearly applied on the sheet 12 and cured.

As shown in FIG. 3, a large number of heat exchange elements 11 having such a configuration are laminated by alternately changing the longitudinal directions of the partition portions 13 by 90 degrees (2 in FIG. 3). It is possible to form a heat exchanger of a cross flow type having two flow channels 16 and 17 which are orthogonal to each other, by showing a state in which the individual heat exchange elements 11 are laminated.

Next, a method of manufacturing the heat exchange element 11 will be described with reference to FIG. The sheet 12 is installed in a predetermined portion in a state of being wound into a roll and is pulled out in the direction of arrow A in the figure. A tank 18 containing a hot-melt type adhesive material and a cylinder 19 containing nitrogen gas or carbon dioxide gas are installed beside the sheet 12, and the tank 18 and the cylinder 19 lead out from the tank 18. The tips of the formed tubes 18a and 19a are connected to the coating device 20.

In this case, the coating device 20 is provided with two nozzles 21, and the adhesive 14 is discharged from both nozzles 21. Although only one coating device 20 is shown in FIG. 4, three coating devices 20 are installed so that six partition portions 13 can be formed at the same time.

In the above structure, the heat exchange element 11 is manufactured as follows. First, while pulling out the sheet 12 in the direction of arrow A at a constant speed, the molten adhesive 14 is discharged from each nozzle 21 in each coating device 20 and is applied on the sheet 12 in a streak pattern. Although only two adhesives 14 are shown in FIG. 4, six adhesives will be applied simultaneously. At this time, since nitrogen or carbon dioxide gas is mixed into the adhesive material in the coating device 20 from the cylinder 19, the adhesive 14 discharged from the nozzle 21 contains the gas.

Then, after the adhesive 14 applied to the sheet 12 is cured, the sheet 12 is cut into a predetermined length dimension, whereby the heat exchange element 11 shown in FIG. 1 can be manufactured.

According to the above-described embodiment, the partition 13 of the heat exchange element 11 is bonded to the sheet 12 by the adhesive force of the adhesive 14 itself, so that the partition between the sheet 12 and the partition 13 is separated. The partition portion 13 can be reliably and easily adhered to the sheet 12 over the entire length in the longitudinal direction of the sheet 12 without any gap.

Further, since it is not necessary to impregnate the sheet 12 side with the resin, by using the sheet 12 which is not impregnated with the resin, heat exchange efficiency is improved when the heat exchange elements 11 are stacked and used as a heat exchanger. You can also plan. Further, the adhesive 14 is relatively soft and easily adheres to the adjacent sheets 12 when the heat exchange elements 11 are stacked, which has an advantage that air leakage can be reduced.

When manufactured by the manufacturing method described above, it is possible to manufacture at a speed of 7 to 15 (m / min), and it is possible to improve the production efficiency as compared with the conventional method. Further, since the partition portion 13 can be formed only by applying the adhesive 14, it is easier to manufacture as compared with the case where the straw is used.

Further, the partition portion 13 is formed by mixing a gas into the adhesive 14 when the adhesive 14 is applied to the sheet 12, so that a large number of cavities (not shown) are included inside. Since the volume of the partition 13 can be increased, there is an advantage that the amount of the adhesive 14 used can be suppressed.

The present invention is not limited to the embodiments described above and shown in the drawings. For example, the resin constituting the partition 13 is a hot-melt resin other than a hot-melt type adhesive. The present invention may be appropriately modified and implemented without departing from the scope of the invention.

[0023]

[Effect of device]

 According to the heat exchange element of claim 1, since the partition portion is adhered to the sheet by the adhesive force of the heat-meltable resin itself, the partition portion is attached to the sheet in the entire length in the longitudinal direction. It is possible to adhere reliably and easily over. Further, since it is not necessary to impregnate the sheet side with the resin, the use of the sheet not impregnated with the resin also has an advantage that the heat exchange efficiency when used as a heat exchanger can be improved.

According to the heat exchange element of the second aspect, the partition portion is formed by mixing gas into the resin when the heat-meltable resin is applied to the sheet, thereby increasing the volume of the partition portion. As a result, there is an advantage that the amount of heat-meltable resin used can be suppressed.

[Brief description of drawings]

FIG. 1 is a perspective view of a heat exchange element according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line XX in FIG.

FIG. 3 is a perspective view showing a state where two heat exchange elements are stacked.

FIG. 4 is a schematic perspective view for explaining a manufacturing method.

5 is a diagram corresponding to FIG. 1 showing a conventional configuration.

6 is an enlarged cross-sectional view taken along the line YY in FIG.

[Explanation of symbols]

11 is a heat exchange element, 12 is a sheet, 13 is a partition, 14
Is an adhesive (heat-meltable resin).

Claims (2)

[Scope of utility model registration request] 1. A heat exchange sheet, and a plurality of partition portions provided by applying a heat-meltable resin in a molten state to the sheet in a streak shape and curing the resin. Heat exchange element. 2. The heat exchange element according to claim 1, wherein the partition portion is formed by mixing gas into the resin when the heat-meltable resin is applied to the sheet.