JPH0849994A - Heat exchange element - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a heat exchange element which has high heat exchange efficiency and can be miniaturized at low cost. [Structure] Linear ribs 2 and 2A are provided on the front and back surfaces of a flat plate 1 on the inlet side of the air flow, and on the outlet side arc-shaped ribs 4 and 4 that change the air flow direction to the side.
A is provided, the unit member 5 is formed by integral molding with resin, and the unit member 5 is laminated to form a heat exchange element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate / fin type heat exchange element constructed by stacking layers.

[0002]

2. Description of the Related Art In recent years, a plate-fin type heat exchange element has a wide heat transfer area per unit volume and is widely used as a relatively small and highly efficient heat exchange element.

The two types of fluids to be heat-exchanged are divided into the cross flow type and the counter flow type.

Conventionally, the basic structure of a cross-flow type heat exchange element of this type has been disclosed in, for example, Japanese Patent Publication No. 47-19990. The configuration will be described below with reference to FIGS. 3 and 4.

As shown in the figure, the plate 101 is formed of a processed paper based on a paper material having both heat conductivity and moisture permeability, and the fins 102 are corrugated to form a paper material similar to the plate 101. The unit member 103 is formed by adhering 102 to each other, and the primary side flow path 10 of the unit member 103 is formed.
4 and the secondary side flow path 105 were laminated so as to be alternately orthogonal to each other to form a heat exchange element.

Next, the counterflow type heat exchange element will be described with reference to the drawings.

As shown, the rectangular plate 106
The fins 10 are formed almost half way above the plate 106 so that parallel flow paths are formed by the corrugated fins 107 in the longitudinal direction of the fins 10.
Plate 1 with 7 and without fins 107
A closing part 108 for closing the end is provided at the end of 06, and the fin 107 provided on the front side of the plate 106 and the fin 107 provided on the back side of the plate 106 are provided at opposite positions to form the unit member 109. Then, the unit members 109 are laminated so that the primary airflow 110 and the secondary airflow 111 face each other.

[0008]

In the structure of such a conventional heat exchange element, the fin 107 is bonded and fixed to the plate 106 in the former cross flow type, so that the productivity is poor and the heat exchange capacity is small. It was In the latter counterflow type, the capacity is improved as compared with the crossflow type, but the productivity is poor, and since the corrugated fins 107 are used, the ventilation resistance is large, and it is not possible to expect a significant improvement in heat exchange efficiency and high cost. There was a problem that was.

Further, there is a problem that the heat exchange efficiency is poor and the size cannot be reduced. The present invention solves the above-mentioned problems, and an object of the present invention is to provide a heat exchange element which has good heat exchange efficiency and can be miniaturized at low cost.

[0010]

In order to achieve the above object, the first means of the heat exchange element of the present invention is a flat plate made of paper or the like, and a heat medium flowing on one side of the plate. Linear ribs provided on the inlet side of the flow path and arcuate ribs provided on the outlet side so that a passage is formed, and linear ribs and arcuate ribs similar to the surface provided on the back surface of the plate. The plate includes a rib and a unit member in which a linear rib and an arc-shaped rib provided on the plate are integrally molded with resin, and the flow paths formed by the linear ribs provided on the front surface and the back surface of the plate are opposed to each other. ,
A unit member having a structure in which the direction of the flow path is changed by the arc-shaped rib is laminated.

In the second means, the linear ribs provided on the plate are formed so that the central rib is long and the distance is shorter than the central rib.

[0012]

According to the present invention, by the structure of the above-mentioned first means, the primary airflow and the secondary airflow flowing into the opposing flow passage formed by the linear ribs are smoothly changed in direction by the arcuate ribs. The air flow resistance is reduced and the heat exchange efficiency is improved. Further, the arcuate ribs help the resin to flow at the time of integral molding to form the unit member and prevent the plate from being bent.

Further, according to the constitution of the second means, the parallel flow passages formed by the linear ribs are formed by separating them into the left and right sides by the arcuate ribs, so that the flow of the airflow becomes smooth and the heat exchange efficiency is improved. It can be miniaturized.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, in order to form a parallel flow path on one side of a flat plate 1 made of paper or the like, the straight rib 2 forming the inlet side of the flow path is longer in the central part and is longer than the central part. As the distance increases, the length is gradually shortened, a closing rib 3 that closes the end is provided at the end facing the linear rib 2, and the outlet side portion formed between the closing rib 3 and the linear rib 2 is An arcuate rib 4 is formed so that one end corresponds to the end of the linear rib 2 and the other end corresponds to the left and right sides of the plate 1, and the linear rib 2A is also formed on the back surface of the plate 1. Closing rib 3A and arcuate rib 4
A is a linear rib 2 provided by converting 180 degrees in a direction in which the linear shapes 2 and 2A face each other and provided on the front surface and the back surface.
And 2A and closing ribs 3 and 3A and arcuate ribs 4 and 4
The unit member 5 is formed by integrally molding A with resin.

Then, between the unit members 5 and the unit members 5, a cutting plate 6 made of paper or the like cut into a certain size is inserted, and the heat exchanging elements are stacked by stacking so as to alternately form opposed flow paths. Form.

In the above structure, when the primary airflow 7 and the secondary airflow 8 are sent to the heat exchange element, the primary airflow 7 flowing on the surface side of the plate 1 enters from the inlet flow path formed by the linear ribs 2 and has an arc shape. The ribs 4 change the direction to the left and right and are discharged from the separated outlet flow path.

On the other hand, the secondary airflow flows to the back side of the plate 1 so as to face the primary airflow, and heat is exchanged with the primary airflow flowing on the front side through the plate 1, and the airflow after the heat exchange is It is guided by the arc-shaped rib 4A and separated into right and left and discharged.

As described above, according to the heat exchange element of the embodiment of the present invention, the arcuate ribs 4 and 4A smoothly change the direction of the air flow to improve the flow of the air flow and improve the heat exchange efficiency. The flow of the resin in is promoted, and the molding becomes easy.

Further, by providing the arc-shaped ribs 4 and 4A, the plate 1 is prevented from being bent, the heat exchange efficiency is prevented from being lowered due to an increase in ventilation resistance, and the arc-shaped ribs 4 and 4A separate the plate 1 into right and left. Since it is formed in a shape, the unit member 5 can be formed in a small size.

In the embodiment, the airflow is provided so as to be separated into the right and left by the arcuate rib, but it goes without saying that the airflow may be sent out in one direction by the arcuate rib.

[0021]

As is apparent from the above embodiments, according to the present invention, the linear ribs are provided on the inlet side of the flow path, and the arc-shaped ribs are provided on the outlet side so as to face each other. It is possible to provide a heat exchange element in which the flow of the air flow is improved, the heat exchange efficiency is improved, and the size can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a unit member of a heat exchange element of the present invention.

FIG. 2 is a perspective view showing a laminated state of unit members of the heat exchange element.

FIG. 3 is a perspective view showing a configuration of a unit member of a conventional cross-flow heat exchange element.

FIG. 4 is a perspective view of the cross flow type heat exchange element.

FIG. 5 is a perspective view showing a configuration of a unit member of the counterflow heat exchange element.

FIG. 6 is a perspective view of the counterflow type heat exchange element.

[Explanation of symbols]

 1 plate 2,2A linear rib 4,4A arc-shaped rib 5 unit member

Claims (2)

[Claims] 1. A flat plate made of paper or the like, and linear ribs provided on the inlet side of the flow passage and provided on the outlet side of the plate so that a flow passage through which the heat medium flows is formed on one side of the plate. Arc-shaped ribs, linear ribs and arc-shaped ribs similar to the back surface provided on the back surface of the plate, and a unit member formed on the plate by integrally molding the linear and arc-shaped ribs with resin. A heat exchange element comprising a unit member, which has a structure in which the flow paths formed by linear ribs provided on the front surface and the back surface of the plate are opposed to each other, and the arc-shaped ribs change the direction of the flow path. 2. The heat exchange element according to claim 1, wherein the linear ribs provided on the plate are formed so that the central rib is long and the distance is shorter than the central rib.