JPS602888A - Heat exchanging element - Google Patents

Abstract

PURPOSE:To enlarge the effective area of a heat exhaust exchanging element by the heat exchanging through a corrugated sheet. CONSTITUTION:A single-sided corrugated board is composed by adhering a quadrilateral plane-shaped sheet 1 on the crest part of a corrugated sheet 2. Both side edges of the corrugated surface of the first corrugated sheet 2 is adhered on the corrugated surface of the second corrugated sheet 2 via sealants 4, 4 made of a non-air-permeable material so that the wave direction of both sheets is arranged in the same direction, and the space formed between the surfaces of both corrugated sheets is made nearly the same distance. Thereby, a laminated body having small through holes 3a and spaces 5 is obtained, accordingly, the laminated body is composed of many straight small through holes 3a, 3a and wide-bent spaces 5 which are intersected through at right angle the small through holes 3a. A heat exchanging element in which the small through holes 3 and the spaces 5 are intersected at right angle is obtained by adhering said many laminated bodies. When two kinds of gases X and Y having different temperature and/or humidity are flowed through each said small holes group 3a, 3a and wide-shaped spaces 5, the gas Y is made to generate a turbulent flow, the heat transfer coefficient is increased. Also the effective surface area of a heat transfer surface 2 is increased. Therefore, a total heat exchanging can be performed effectively.

Description

Detailed Description of the Invention The present invention consists of stacking multiple layers of cardboard made by pasting together multiple sheets, allowing two types of gases to pass independently through the gaps between each layer, and creating a gap between the two types of gas through the sheets. The present invention relates to a cross-flow type heat exchange element that exchanges sensible heat, latent heat, or total heat.

Conventionally, this type of cross-flow type heat exchange element has a planar sheet (1) and a corrugated sheet (2) alternately, and the directions of the waves of the corrugated sheet (2) are perpendicular to each other at each stage, as shown in FIG. A large number of small through holes (3a) and (3b) are formed perpendicularly to each other by stacking a large number of layers so as to form a large number of small through holes (3a) and (3b).
3a)1. '(3b), pass high temperature gas X and low temperature gas Y, respectively, and transfer the thermal energy of high temperature gas By transmitting low temperature gas yK, a flat sheet (1
), and in this case, the planar sheet (1) is made of a moisture-permeable material and is impregnated with a moisture absorbent. Humidification and dehumidification can be performed by the transfer of gases, and sensible heat and latent heat, that is, total heat, can also be exchanged between the two gases.

In this case, it is necessary to select a material with good thermal conductivity as the material for the planar sheet that serves as the heat transfer medium.
Kraft paper or other paper or aluminum or other metal thin plate is usually used in consideration of the cost and other factors, and under normal usage conditions, that is, when the wind speed is 2.5-S, 5m/(ieQ), the heat exchange efficiency is 60< or more. It was extremely difficult to raise the

When a single-sided corrugated board is obtained by bonding a flat sheet (1) and a corrugated sheet (2), the length of the corrugated sheet (2) is one whose cross-sectional shape forms a sine curve as shown in Figure 2; As shown in Figure 3, various shapes can be considered, such as a broken line shape connecting the two sides of a triangle, but in any case, the area of the corrugated sheet is wider than the area of the flat sheet with the same contour, so it is practically impossible to use the flat sheet. It is easy to make the area 1.5 times to 1.8 times the area of . Therefore, if heat exchange is performed through a corrugated sheet instead of the method described above where heat exchange is performed through a flat sheet, if the material of the sheet, the size of the heat exchange element, the size of the small through hole, etc. are all the same, The effective area for heat exchange should be 1°5 to 1°8 times larger.
The present invention embodies this idea, and examples will be described in detail below with reference to the drawings.

Example 1 As shown in FIG. 2, a quadrilateral planar sheet (1) and a corrugated sheet (2) are glued together at the Q wave crests of the corrugated sheet (2) to form a single-sided corrugated board. Apply a sealant (4) made of non-porous material to both corrugated edges of the single-sided corrugated sheet (2) to make the corrugated sheet surface of the second single-sided corrugated sheet (9) have the same wave direction. At the same time, a large number of straight small through-holes (3a), (3a) and the small through-holes (
3a), a laminate is obtained in which a wide (Q-bent gap (5) is formed) that passes through in a direction perpendicular to (3a).

As shown in Fig. 5, this laminate has small through holes (3a) and gaps (
5) are laminated and bonded together in the same direction to obtain a heat exchange element in which the small through holes (3a) and the gaps (5) are perpendicular to each other.

Example 2 As shown in Fig. 6, corrugated sheets (2), (2) are placed on both sides of a quadrilateral planar sheet (1).
σ) Align the direction of the waves and glue the corrugated sheet (2) (2) LJ) at the crest of the wave to form a corrugated board. As shown in Figure 7, apply non-porous material to both corrugated edges of the corrugated corrugated sheet (2). The next corrugated cardboard is bonded with the sealant (4) and (4a) made of the following materials so that the direction of the waves is aligned and there is an appropriate distance between the straight corrugated sheet surfaces, and the sheets are stacked one after another. As shown at the top of the figure, sealant (4),
A large number of straight small through holes (S a ) are formed by gluing the single-sided cardboard shown in FIG. 2 through (4) or by gluing one flat sheet (1) as shown at the bottom of Nishiki 7.

A heat exchange element is obtained in which the small through hole (3a) and a wide curved gap (5) that passes through in a direction perpendicular to (3a) are formed.

Example 3 As shown in Fig. 8, two corrugated sheets (2) of the same shape, (
2) is glued at the crest of the wave, and a large number of small through holes (3a
) and (3a) are arranged side by side as corrugated cardboard, and as shown in Fig. 9, adhesives (4) and (4) are applied to both corrugated edges of the corrugated sheet (2) of this corrugated cardboard and filled, and the next corrugated cardboard is attached to the corrugated sheet. Align the direction and stack the cardboard boxes in the order shown in Figure 8 with adhesive (4)
, (4) to form a large number of small through holes (3a), (3a
) are lined up in the same direction, then apply adhesive (4) (
4) The sheets are stacked so as to form a wide curved gap (5) with both edges closed, and in the final step, one flat sheet (1) is glued together as shown at the top of Figure 9. id: As shown at the bottom of FIG. 9, the single-sided cardboard shown in FIG. Small through hole (3a), (3
a) Wide width penetrating in the direction perpendicular to f) Bent gap (5)
A heat exchange element is obtained.

In the above measurement examples 1± to 3, the planar sheet (1) and the corrugated sheet were paper, cloth 1 asbestos paper, synthetic resin sheet, metal sheet, carbon fiber-containing paper,
Materials with appropriate heat resistance and moisture resistance are selected depending on the usage conditions, such as non-woven fabric and synthetic paper, and various cardboard shapes such as square, rectangle, rhombus, and parallelogram can be selected depending on the usage.

The heat exchange elements shown in Figs. 5, 7, and 9 have reinforcing frames on 6 edges, several reinforcing plates on both the upper and lower sides, and are made of corrugated sheets (2 ) may be deformed, a rod-shaped or dot-shaped support member (6) may be inserted as shown in FIG. 9(6). glue(
4) For (4) and 1j, synthetic resin sol or inorganic sealing material can be used, and instead of using adhesive as a sealing material, a pre-formed corrugated sealing material can be used for both corrugations. It is also possible to sandwich and bond between the sheet end faces. Seal width is 1 to 10
It is desirable to set it to about ζm.

The corrugated sheet (2) is made of a moisture-permeable material such as paper, cloth, asbestos paper, ceramic paper, non-woven fabric, synthetic paper, paper mixed with activated carbon fiber, etc., and contains moisture-absorbing materials such as lithium chloride, lithium bromide, calcium chloride, and silica gel. When impregnated with an agent, not only sensible heat but also moisture, ie, latent heat, can be exchanged through the corrugated sheet, and it can be used as a total heat exchanger, humidifier, or dehumidifier. Furthermore, a flat sheet (1)
And/or when activated carbon or other gas-absorbing material is attached to the corrugated sheet (2) or paper mixed with activated carbon fiber is used, the active gas contained in the processing gas X or Y can be stratified and removed at the same time as heat exchange. .

(2) Wavelength of Q wave 1.2 Corrugated sheet (
2) Lithium chloride, which is only 3 g compared to the summer amount? Sensible heat exchange efficiency 'Zt (%)l for the element impregnated with t
Figure 10 shows the results of measuring χ and latent heat exchange efficiency -' (X (%).
e c, ), the g axis is the heat exchange rate, tXX is the sensible heat exchange efficiency and the latent heat exchange efficiency, respectively.

In addition, the results of measuring the static pressure loss 4p (amAq) are shown in the 11th
As shown in the figure. In the figure, the horizontal axis represents the forward ω1j velocity (-/s) Since the heat exchanger element of the present invention is constructed as described above, the small through-hole group (3
When passing two types of gases X and Y with different temperatures and humidity through a), (3a) and the wide gap (5), respectively, the path I'i of the wide gap (5) is bent. Because of this, the gas passing through it creates a turbulent flow, resulting in a thin boundary layer and a large heat transfer coefficient.The heat transfer surface (2) is similar to the heat transfer surface in the conventional element shown in Figure 1. Compared to (1), it has an effective surface area that is 1.5 to 1.8 times larger when compared with the same dimensions, so compared to conventional elements, it is possible to perform extremely efficient total heat exchange as shown in Figure 10. , and the gas passing through the gap (5) has the characteristic effect that the static pressure loss is reduced because there are no many partition walls in the passage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a conventional cross-flow type heat exchange element;
8g2 and 3 are perspective views showing examples of single-sided corrugated cardboard. 4 to 9 show examples of the present invention, FIG. 4 is a perspective view of a laminate in an intermediate step in an example of the present invention, and FIG. 5 is a laminate obtained by laminating the laminate of FIG. 4. FIG. 6 is a perspective view of a laminate in an intermediate step of another example of the present invention, and FIG. 7 is a view obtained by laminating the laminate of FIG. 6. FIGS. 10 and 11 are graphs comparing heat exchange efficiency and static pressure loss between a conventional cross-flow type heat exchange element and the heat exchange element of the present invention. hole, (4) is a corrugated seal, (5) is a wide bend/fl
, ln rod 21 calculation 3) 辿3゜etc. 7) Z ′ rub 8 Fig. 3 Mi 42

Claims (1)

[Scope of Claims] 1. Two corrugated cardboard sheets made of a plurality of sheets pasted together, with a sealant between the corrugated edges of the corrugated sheet surfaces so that both corrugated sheets are held at an appropriate distance. A heat exchange element characterized in that a large number of corrugated sheets 8 are layered so that the wave directions of the corrugated sheets are the same. 2. The heat exchange element according to claim 1, wherein the corrugated board is a single-sided corrugated board made by pasting together a planar sheet and a corrugated sheet. 3. The heat exchange element according to claim 1, wherein the corrugated board is a corrugated pole made by laminating corrugated sheets on both sides of a planar sheet. The heat exchange element according to claim 1, which is a corrugated board made by joining two corrugated sheets at the crests of the corrugated sheets. 5. The heat exchange element according to claims 1 to 4, wherein a moisture permeable sheet impregnated with a moisture absorbent is used as the corrugated sheet. d. The heat exchange element according to claims 1 to 4, wherein a gas absorbing material is used as the corrugated sheet.