JPH0373796B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a plate-fin type heat exchanger having a laminated structure and serving as the main body of an air conditioner.

[Conventional technology]

Plate-fin type heat exchangers have a large heat transfer area per unit volume, and are widely used as relatively small and highly efficient heat exchangers. It can be divided into three types: countercurrent type, countercurrent type, and orthogonal (diagonal) flow type. Counter-flow and cross-flow types are often used for air conditioners, but until now their basic configuration has consisted of a plate separating two fluids to be heat exchanged, and a double row of parallel flow channels. It is made by stacking corrugated plate-like fins in between. In air conditioners, the plates are made of Japanese paper-based paper material that has both heat conductivity and moisture permeability.
The fins are also obtained by processing the same paper material as the plate into a corrugated plate.

[Problem that the invention seeks to solve]

However, the heat exchanger described above is difficult to manufacture, as it is necessary to cut the end face without crushing it, and it is also difficult to manufacture the heat exchanger in a predetermined shape by cutting the laminated structure. Since it is used for many different purposes, it had the problem of producing a lot of waste material. Therefore, the inventor of the present invention developed a heat exchanger obtained by arranging fins as rod-shaped or rib-shaped spacing members on one side of a plate made of Japanese paper or the like in a predetermined shape (Japanese Patent Application No. No. 162239 (see Japanese Unexamined Patent Publication No. 162239 (see Japanese Patent Application Laid-Open No. 1983-41895)), the plate and spacing member do not fit together well at the joint surface, and gaps are formed at the joint surface between the plate and the spacing member. It contains some problems that are said to be difficult.

The present invention was made in order to solve the above-mentioned conventional problems, and it has a good connection between the partition plate made of paper material such as Japanese paper and the linear spacing members arranged in a row on one side of the partition plate. The purpose of the present invention is to obtain a heat exchanger with a stable structure and good productivity, which has a structure in which almost no gaps are formed on the joint surfaces.

[Means for solving problems]

The heat exchanger according to the present invention has heat conductivity,
It is made by arranging linear spacing members in rows at predetermined intervals along the direction of the composition fibers on one side of a flat partition plate made of a paper material such as Japanese paper with directional composition fibers. A plurality of unit members are stacked to form a multi-stage double-row fluid flow path using the spacing member in the opposing gap between each plate, and two fluid flow paths to be heat exchanged are formed in the fluid flow path partitioned by the plates. It is constructed so that fluid passes through it alternately layer by layer.

[Effect]

In this invention, since the partition plate has directionality in its composition fibers and the linear spacing members are arranged on one side of the partition plate along the direction of the composition fibers of the partition plate, the partition plate itself The deformation is regular, and the spacing member can act as a member to obstruct this deformation, and the cohesion between the spacing member and the partition plate can be improved by their cooperation.

[Embodiments of the invention]

Next, the configuration of the present invention will be specifically explained based on embodiments shown in the drawings.

The heat exchanger of the embodiment shown in the drawings is an air-to-air heat exchanger employed in the air conditioning field, and the one in FIG. The type shown in FIG. 3 is a counter-flow type in which two fluids to be heat exchanged flow oppositely.

First, a cross-flow type heat exchanger 1 will be described as an example of a heat exchanger in which two fluids flow at an angle. This heat exchanger 1 includes a unit member 4 formed by integrally or adhesively fixing fins and linear bar-shaped spacing members 3 as reinforcing members at equal intervals in a fixed direction over the entire surface of one side of a partition plate 2. It is obtained by laminating layers so that the direction of 3 is shifted by approximately 90 degrees from layer to layer. The partition plate 2 is made of a paper material such as Japanese paper that has both heat conductivity and moisture permeability, and has a thickness of 0.05 to 0.2 mm.
It is a rectangular flat plate with a wall thickness of about 100 mL, and is a member that partitions two fluids to be heat exchanged. In particular, when forming it, the direction of the composition fibers 2A runs in one direction and approximately parallel to each other. As shown in FIG. 2, the spacing member 3 is integrally molded onto one side of the partition plate 2 by a molding machine, or is fixed to the partition plate 2 by adhesive. Each spacing member 3 is arranged along the direction of the composition fibers 2A of the partition plate 2, and its height h (defining the spacing between the plates 2) and pitch (distance) d are as follows:
A fluid passage 5 for passing the fluid to be heat exchanged is formed on the plate 2.
If it is too large, the rectifying effect of the air flow in the fluid flow path 5 will be small;
If it is too small, the static pressure loss in the fluid flow path 5 will increase, so it is determined within a range of about 1 to 10 mm. In addition,
It is better to arrange the spacing members 3 and the spacing members 3 as independently as possible on the partition plate 2, but if the material of the spacing members 3 is made of open-cell foamed resin, for example, the spacing members 3 and the spacing members 3 are connected by a thin resin film-like connection structure that is in close contact with the partition plate 2, there is almost no problem.

If the unit members 4 are stacked with the surface where the spacing members 3 are arranged either upward or downward and the direction of the spacing members 3 is shifted by 90 degrees for each layer, and then glued together, a cross-flow type structure as shown in FIG. 1 can be obtained. A heat exchanger 1 is obtained. If primary air is passed through the fluid flow path 5 of one system in the same direction and secondary air is passed through the fluid flow path 5 of the other system in the same direction, the primary air and secondary air can be passed through the fluid flow path 5 of the other system in the same direction. Total heat exchange with the next air is possible. Structurally, this heat exchanger 1 has composition fibers 2A fixed on one side of the partition plate 2 by spacing members 3 along the direction of the composition fibers 2A, and on the other side, composition fibers 2A are fixed in the direction of the composition fibers 2A. Since the composition fibers 2A are fixed by the spacing members 3 in the orthogonal direction, the partition plate 2 hardly deforms.
Inconveniences such as gaps occurring at the joint surfaces between the partition plate 2 and the spacing member 3 hardly occur.

Next, the counterflow type heat exchanger 1A shown in FIG. 3 will be explained. This heat exchanger 1A also has unit members 4A laminated on one side of a partition plate 2, in which double rows of synthetic resin spacing members 3 are arranged linearly at equal intervals along the direction of the composition fibers 2A of the partition plate 2. The structure is similar to that of the heat exchanger 1 of the previous example in that it can be obtained using the following methods. The difference between this heat exchanger 1A and the previous example is that the spacer member 3 is provided on approximately half of one side of the partition plate 2, and the unit member 4A is arranged so that the side with the spacer member 3 and the side without the spacer member 3 are arranged alternately. The point is that the spacing members 3 are laminated in a staggered manner with the directions of the spacing members 3 parallel to each other. That is, unit member 4A that constitutes this heat exchanger 1A
, the spacing member 3 covers approximately half of one side of the partition plate 2.
is extended, and the other half of one side has only a different partition plate 2 and no spacing member 3. And the third
As shown in the figure, the unit members 4A are stacked in a staggered manner, and among the intervals between the partition plates 2 that appear on the opposing end faces, the portion where the fluid flow path 5 does not appear on the end face due to the spacing member 3 is controlled. If primary air and secondary air are passed from opposite directions through each fluid channel 5 that is closed by a member or a blocking plate 6 and faces opposite end faces, a counterflow system between the primary air and secondary air is created. This makes heat exchange possible. In the case of this heat exchanger 1A, the arrangement direction of all the spacing members 3 coincides with the direction of the composition fibers 2A of the partition plate 2.

Both of the heat exchangers 1 and 1A described above are obtained by laminating unit members 4 and 4A, and have good manufacturability.
Not only is no waste material generated, but because the spacing members 3 are arranged along the direction of the composition fibers 2A of the partition plate 2, there is regularity in the direction of deformation of the partition plate 2, which can be regulated by the spacing members 3. , the connection between the spacing member 3 and the partition plate 2 is high, resulting in a stable structure.
Note that the spacing member 3 may have a hollow tubular structure or a channel-shaped structure as shown in FIG. 4.

〔Effect of the invention〕

As is clear from the above description of the embodiments, the heat exchanger of the present invention is arranged such that the heat exchanger of the present invention is arranged in a straight line at predetermined intervals on one side of a partition plate made of a paper material such as Japanese paper whose composition fibers have directionality. Since it has a structure in which unit members are stacked in rows along the direction of the composition fibers of the partition plate, the fluid to be heat exchanged layer by layer can be easily removed by simply stacking the unit members. A plate-fin type heat exchanger with a layered structure having a fluid flow path through which the heat exchanger passes is obtained, which is easy to manufacture and produces no waste materials. In addition, there is a regularity in the way the partition plate deforms.
Since the deformation can be controlled by the spacing member along the direction of the composition fibers, the spacing member and the partition plate have good bonding properties, and the advantage is that the structure is highly stable with no gaps being formed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a cross-flow type heat exchanger as an application example of the present invention, FIG. 2 is a perspective view showing its unit members individually, and FIG. 3 is a perspective view showing another embodiment of the present invention. A perspective view of the heat exchanger shown in FIG. 4 is an explanatory diagram showing another form of the spacing member. 1,1 in the figure
A is a heat exchanger, 2 is a partition plate, 2A is a composition fiber, 3
is a spacing member, 4 and 4A are unit members, and 5 is a fluid flow path. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. Linear spacing members are arranged in rows at predetermined intervals on one side of a flat partition plate made of a paper material such as Japanese paper that has heat conductivity and has directional fiber composition. A plurality of unit members arranged along the direction of the composition fibers are laminated to form multiple rows of fluid flow paths by the spacing members in opposing gaps between the plates, and each of the plates A heat exchanger configured so that two fluids to be heat exchanged are passed alternately layer by layer through a partitioned fluid flow path. 2. The heat exchanger according to claim 1, wherein the spacing member is adhesively disposed on one side of the partition plate. 3. The heat exchanger according to claim 1 or 2, wherein the spacing member is integrally formed on one side of the partition plate.