JPS6229898A - Heat exchanger - Google Patents

Abstract

PURPOSE:To facilitate the manufacture and reduce the pressure loss by employing a structure in which unit components each comprising a planar partitioning plate on its one side rows of rod-shaped spacers are stacked, said spacers being formed into a thin-walled hollow structure. CONSTITUTION:Spacers 3 of a unit component which is to be stacked are of a hollow construction which provides a necessary stiffness even if it is thin- walled, and the hollow space can be used as a fluid passage 5A. Therefore, both 5 and 5A are available for the fluid passage, which by no means narrows the fluid passage, but rather enlarges the same. Therefore, the pressure loss is reduced, and so is the noise. Manufacture is simplified in that said unit components 4 are mutually stacked one upon another, and processes such as cutting which tend to produce waste materials becomes unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plate-fin type heat exchanger having a bonded groove structure, which is mainly employed in air conditioners.

[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. Counter-flow and cross-flow types are often used for air conditioners, but until now their basic configuration has been to use a partition plate to separate two fluids to be heat exchanged, and a double-row fluid flow path. It is made by sandwiching and stacking the constituent corrugated plate-like fins. The partition plate is made of a paper material based on Japanese paper that has both heat conductivity and moisture permeability, and the fins are also made of a corrugated sheet of paper similar to the partition plate and have a predetermined size and shape. It is obtained by cutting this. However, for heat exchangers with this type of structure, manufacturing the corrugated plate-like fins is technically quite difficult, including cutting to obtain good end faces that do not obstruct ventilation, and depending on the shape of the heat exchanger, cutting is required. There are many problems such as the production of a large amount of waste material. Therefore, a large number of rod-shaped spacing members (103) made of resin or the like are installed in parallel on one side of the partition plate (102) as shown in Fig. 5.
A highly manufacturable heat exchanger in which a predetermined shape can be obtained without cutting has been developed, in which a plurality of unit members (104) arranged in this manner are stacked together (Japanese Patent Application No. 162,239/1982).

[Problem that the invention seeks to solve]

In the conventional heat exchanger formed by stacking the unit members (104) described above, the thickness of the spacing member (103) is 2Wr.
Since it is about II, as shown by the broken line 1 in Figure 4,
When used in an air conditioner, the power consumption and noise are relatively large. In other words, the spacing member (103) narrows the flow path and increases pressure loss. These problems should be solved by making the spacing member (103) thinner, but if you try to make the spacing member (103) less than 2M, the difficulty in molding will increase and the cost will increase. be.

The present invention was made to solve these problems, and an object of the present invention is to provide a heat exchanger that is easy to manufacture, has low pressure loss, and can be obtained at low cost.

[Means for solving problems]

The heat exchanger according to the present invention is a stack of a plurality of unit members each having a plurality of bar-shaped spacing members arranged in a row on one side of a flat partition plate, and the spacing members of the unit members are thin-walled. It has a hollow structure, and is formed so that a fluid flow path is also formed by the hollow portion of the spacing member outside the gap between the spacing members.

[Effect]

In this invention, the spacing members between the unit members to be laminated have a hollow structure, so that it is easy to obtain the necessary rigidity even if the wall is thin, and
Since the hollow part also serves as a fluid flow path, the fluid flow path can be expanded rather than narrowed.
This is a low-cost heat exchanger with low pressure loss and low noise.

[Embodiments of the invention]

The heat exchanger as an example shown in FIG. 1 is an air-to-air heat exchanger employed in the air conditioning field, and is a cross-flow type in which two fluids to be heat exchanged flow at approximately right angles.

This heat exchanger (1) has linear or rod-shaped spacing members (3) arranged at equal intervals in a certain direction between each of a plurality of partition plates (2). The arrangement direction of the spacing members (3) is shifted by approximately 90 degrees from layer to layer. The partition plate (2) is made of Japanese paper, which has both heat conductivity and moisture permeability, and has a thickness of 0.0! Mff ~ 0.2 mm square plate,
It is a member that partitions two fluids to exchange heat. and,
On one side of the heat exchanger (1), spacing members (3) obtained by extrusion molding of vinyl chloride or foamed resin are adhered in rows (sometimes integrally molded) at predetermined intervals. A unit member (4) serving as a structural unit is configured.

The spacing member (3) of each unit member (4) has an outer diameter of 2 in the illustrated example.
It is a thin pipe shape with a wall thickness of n1 of about 0.11'1 to 0.2ff. A fluid flow path (5) is formed between the spacing members (3) and the spacing members (3) by upper and lower partition plates (2),
The hollow portion of the spacing member (3) also serves as a fluid flow path (5A). Note that the spacing member (3) may be a square tube, a triangular tube, a hexagonal tube, etc. as shown in FIG. is widely available and easy to make.

Thus, the unit members (4) are separated layer by layer by the spacer members (3).
) are stacked so that the arrangement direction is shifted by 90' and glued to each other, a cross-flow type heat exchanger (1) made of Azure Mizozukuri as shown in Fig. 1 can be obtained without cutting the end faces. You can get it without doing it. Then, one system of fluid flow channels (5
), (5A) and another system of fluid flow paths (5), (5A). Total heat exchange between the air and the secondary air is possible. This heat exchanger (1) has a spacing member (3) that narrows the flow path, and the flow path is expanded rather than a simple prismatic shape, so the pressure loss is small and the fluid flow. Even if it collides with the spacing member (3) when flowing into the channels (5) and (5A), the noise is small due to the thin wall.As shown by the solid line in Figure 4, the air blowing test using a blower showed that the power consumption was reduced and the noise was reduced. A reduction of 10% was achieved.

Note that the unit members (4) are stacked so that the multi-stage fluid channels (5) formed by the spacing members (3) are all parallel to each other, and each parallel channel facing the opposing end face is separated from the opposite direction. By passing primary air and secondary air, it is also possible to obtain a counterflow type heat exchanger that enables heat exchange between the primary air and secondary air by a counterflow method.

〔Effect of the invention〕

As is clear from the above description of the embodiments, the heat exchanger of the present invention includes a unit member formed by arranging a plurality of bar-shaped spacing members in a row at intervals on one side of a heat-conductive partition plate. A heat exchanger configured by laminating a plurality of partition plates and configuring multi-stage double rows of fluid passages by the spacing member P in the gaps between each partition plate, in which the spacing member of each unit member is a thin hollow groove, Will the hollow part also serve as a fluid flow path? Since it is made of solid wood, it can be easily manufactured by laminating unit members together, and does not require processes such as cutting that produce waste materials.

In addition, since the spacing member does not narrow the flow path, but rather expands it, the pressure loss when conducting fluid is small.
Noise is also reduced. Furthermore, in terms of cost, it is possible to reduce the cost because thin hollow members are easy to obtain rigidity and are not very difficult to mold.

[Brief explanation of the drawing]

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 the spacing member and other parts of the present invention. FIG. 4 is an explanatory view showing an air blowing test of a conventional example and an example, and FIG. 5 is a perspective view showing a heat exchanger as a conventional example. In the figure, (1) is a heat exchanger, (2) is a partition plate, (3) is a spacing member, (4) is a unit member, (5), (
5A) is a fluid flow path. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A plurality of unit members each having a plurality of bar-shaped spacing members arranged in a row on one side of a heat-conductive flat partition plate are laminated, and a double row of spacing members is formed in the gap between each partition plate. A heat exchanger having a multi-stage fluid flow path, wherein the spacer members of the unit members have a thin hollow structure, and the hollow portions of each spacer member also form fluid flow paths. vessel. (2) The heat exchanger according to claim 1, wherein the spacing member is formed as a round pipe or square pipe made of vinyl chloride or foamed resin.