JPH0875385A - Heat exchanging element - Google Patents

Abstract

PURPOSE: To prevent the deflection of a plate by so providing a rib provided substantially in S state and front and rear surface ribs of a counterflow part of a unit member integrally molded of resin as to be crossed, and laminating them via cut plates such as sheets. CONSTITUTION: End ribs 2a inclined at the same angle are provided near both ends for forming the inlet and the output of a channel on one side surface of a flat platelike plate 1, a central rib 2b for coupling the ribs 2a is provided, and a rib 2 of substantially S state is formed. End ribs 3a are so provided at the end rib 2a of the front surface as to be obliquely crossed even on the rear surface of the plate 1, and the rib of substantially S state is formed at the ribs 3a and a central rib 3b. The ribs 2, 3 are integrally molded of resin to form a unit member 4. Further, a cut plate 5 such as sheet cut in a predetermined size is inserted between the members 4, primary and secondary channels are alternately formed and laminated. Accordingly, the decrease of a heat exchanging efficiency can be prevented.

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 a cross-flow type and an opposite-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. 6 and 7.

As shown in the figure, the plate 101 is formed from a processed paper based on a paper material having both heat conductivity and moisture permeability, and the fins 102 are formed by corrugating the same paper material as the plate 101 to form the plate 101 and the fins. The unit member 103 is formed by adhering 102 to each other, and the heat exchange element is formed by stacking the primary side airflows 104 and the secondary side airflows 105 flowing in the flow paths of the unit member 103 so as to be alternately orthogonal to each other.

Next, a counterflow type heat exchange element is shown in FIG.
The description will be made with reference to FIG.

As shown in the figure, 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.

Therefore, in the former cross flow type, the productivity was not so high and the cost was high. Further, in the latter counterflow type, the ventilation resistance is large and the heat exchange efficiency is low, the productivity is poor and the cost is high.

Therefore, in order to improve the performance and productivity, the one disclosed in Japanese Patent Laid-Open No. 2-68878 has been developed. The configuration will be described below with reference to FIGS. 10 and 11.

As shown in the figure, a plurality of fin ribs 122 for forming a parallel flow path through which a heat medium flows are provided on one side of a flat plate 121 made of paper or the like, and similar ribs 122A are provided on the back side. The units are arranged at right angles to the surface and integrally molded with resin as the unit member 123, and the parallel flow paths are alternately formed by sandwiching the unit member 123 and a cutting plate 124 made of paper cut into a certain size between the unit members 123. Thus, the cross-flow type heat exchange element was formed by stacking the layers.

It has also been considered to manufacture a counterflow type heat exchange element by applying the technique of integrally molding the unit member 123 with resin as described above.

The configuration will be described below with reference to FIG. As shown in the figure, a plate 131 formed in a substantially hexagonal shape is integrally molded with resin so as to provide a plurality of ribs 132 formed in a substantially S shape on one surface so that the flow directions in the vicinity of both ends and the central portion are changed. To form the unit member 133.

[0013]

In such a conventional counterflow type heat exchange element integrally formed, the plate 131 has the rib 132 only on one side at the counterflow portion 134 in the central portion. Plate 13 between
There is a problem that the deflection of No. 1 becomes large, the ventilation resistance becomes large, the heat exchange efficiency deteriorates, and the resin flow at the time of integral molding is bad and the productivity is bad.

The present invention solves the above problems, and an object of the present invention is to provide a heat exchange element having high heat exchange efficiency.

A second object is to obtain a heat exchange element with good productivity.

[0016]

The heat exchange element of the present invention is to solve the above problems. To achieve the first object, the first means is a plate made of paper or the like, and a plate made of this plate. A rib provided in a substantially S shape so that a parallel flow path through which a heat medium flows is formed on one surface, and a rib on the front surface in the vicinity of both ends on the back surface of the plate, obliquely intersects with a counterflow portion A unit member integrally formed with resin and a rib provided in a substantially S-shape so that
The ribs on the front surface and the back surface, which are provided in the opposite flow portion of the unit member, are provided so as to intersect with each other, and the unit members are laminated via a cutting plate such as paper.

In order to achieve the second object, the second means forms engaging elements or engaging holes on the front surface side and the rear surface side of the unit member, respectively, and the engaging elements are formed in the engaging holes at the time of stacking. The positioning portions are provided at symmetrical positions on the ribs so that they are engaged with each other and positioned at the time of stacking.

[0018]

According to the present invention, since the ribs forming the counterflow portion are provided so as to intersect with each other by the structure of the above-mentioned first means, the plate is provided in comparison with the one provided by superposing the ribs on the front surface and the back surface. The ribs provided on the front and back sides of the plate become narrower, and the ribs on the front surface and the ribs on the back surface increase the area where the plate is supported, preventing deflection of the plate and reducing heat exchange efficiency due to deflection of the plate. To be prevented.

Further, according to the constitution of the second means, the air flow paths of the unit members to be laminated are alternately opposed by the engagement of the positioning portions provided on the unit members.
There is no need to confirm the directionality during stacking, which improves productivity.

[0020]

【Example】

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, since a parallel flow path is formed on one surface of a plate 1 of a substantially hexagonal flat plate made of paper or the like, end portions inclined at substantially the same angle near both ends forming the inlet and the outlet of the flow path. The rib 2a is provided,
Since the counterflow portion is formed in the central portion, the end rib 2a
A central rib 2b that connects the two is provided, and the end rib 2a and the central rib 2b form a substantially S-shaped rib 2.

Similarly to the S-shaped ribs 2 provided on the back surface of the plate 1, the substantially S-shaped ribs 3 including the end ribs 3a and the central ribs 3b are provided on the front surface end ribs 2.
The end ribs 3a on the back surface are obliquely crossed with respect to a, and the central rib 2b provided on the front surface and the central rib 3b provided on the back surface are formed in a wavy shape so as to cross each other. Rib 2 that is almost S-shaped provided
The unit member 4 is formed by integrally molding and 3 with resin.

Then, a cutting plate 5 made of paper or the like cut into a certain size is inserted between the unit members 4 and laminated so that primary flow paths and secondary flow paths are alternately formed. Form a heat exchange element.

In the above structure, when the primary air flow 6 and the secondary air flow 7 are sent to the heat exchange element, the primary air flow 6 flowing on the surface side of the plate 1 enters from the inlet flow path formed by the end ribs 2a and the central rib. It goes out of the outlet flow path formed by the other end rib 2a through the counterflow portion formed by 2b.

The secondary airflow 7 enters the back side of the plate 1 from the side facing the primary airflow, crosses the primary airflow 6 when passing between the end ribs 3a, and crosses between the central ribs 3b when passing between the central ribs 3b. Flows so as to face the primary airflow 6, and when passing between the other end ribs 3a, flows so as to face the primary airflow 6,
Heat exchange is performed between the primary airflow 6 and the secondary airflow 7 via the plate 1.

As described above, according to the heat exchange element of the first embodiment of the present invention, since the unit member 4 is integrally formed with resin, the productivity is good, and the central rib 2b on the front surface and the central rib on the rear surface are formed. The central ribs 2b and 3b for supporting the plate 1 are formed in a wave shape so that 3b crosses each other.
As a result, the supporting interval becomes narrower, the deflection of the plate 1 is prevented, and the wave shape makes the flow of the air flow smoother to improve the heat exchange efficiency.

Although the first embodiment has been described using the substantially hexagonal plate-shaped plate 1, the plate 1 is formed by integrally shaping the S-shaped ribs 2 and 3 and then cutting the plate into a predetermined shape. It goes without saying that it may be formed.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. The first
The same parts as those in the embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the drawing, a cylindrical engaging element 8a is provided near the end rib 2a of the central rib 2c of the unit member 4A so as to project from the central rib 2c on the front surface, and the central rib 3 on the rear surface side.
The positioning portion 8 is provided with an engaging hole 8b having a size such that the engaging element 8a is fitted at the same position of c, and is positioned during stacking.
Are formed at left and right symmetrical positions.

In the above structure, when the unit members 4A are stacked, the unit member 4A is stacked so that the engaging holes 8b of the positioning portions 8 provided in the unit members 4A are fitted into the engaging elements 8a to form a heat exchange element. To do.

Thus, according to the second embodiment of the present invention,
Since the positioning portions 8 are provided on the unit members 4A, by engaging the positioning portions 8 between the laminated unit members 4A, the flow of the primary airflow 6 and the secondary airflow 7 of the heat exchange elements formed by the lamination is formed. The paths are formed alternately, and it is not necessary to check the directionality as compared with the case where the flow paths are stacked while checking the directionality of the flow paths, so that the productivity is increased.

In the second embodiment, the unit member 4A
Although the central rib 2c provided in the above is not provided with the wave, it is needless to say that the same effect can be obtained even if the wave is provided as in the first embodiment.

Further, the engaging element 8 provided on the unit member 4A
It goes without saying that a may be provided on the back side and the engagement hole 8b may be provided on the front side.

[0033]

As is apparent from the above embodiments, according to the present invention, substantially S-shaped ribs forming flow paths on both sides of a flat plate made of paper or the like are obliquely crossed near both ends, Since it is integrally molded with resin so that it intersects in the central part, it is possible to provide a heat exchange element with high productivity, which prevents plate deflection, and which makes the airflow smooth and improves heat exchange efficiency. .

Further, since the positioning portion for positioning the unit members at the time of stacking is provided, it is possible to avoid the trouble of checking the directionality of the flow paths one by one, and it is possible to easily stack and improve the productivity.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a laminated state of the heat exchange element according to the first embodiment.

FIG. 3 is a perspective view showing a configuration of a unit member of the heat exchange element of the second embodiment.

FIG. 4 is a sectional view of a positioning portion provided in a unit member of the heat exchange element according to the second embodiment.

FIG. 5 is a perspective view showing a laminated state of the heat exchange element according to the second embodiment.

FIG. 6 is a perspective view showing a configuration of a unit member of a conventional cross-flow heat exchange element.

FIG. 7 is a perspective view of the cross flow type heat exchange element.

FIG. 8 is a perspective view showing a configuration of a unit member of the counterflow heat exchange element.

FIG. 9 is a perspective view of the counterflow type heat exchange element.

FIG. 10 is a perspective view showing the configuration of a resin-molded cross-flow type unit member.

FIG. 11 is a perspective view of a heat exchange element formed by stacking resin-molded cross-flow type unit members.

FIG. 12 is a perspective view of a unit member of the resin-molded counterflow type heat exchange element.

[Explanation of symbols]

 1 plate 2,3 S-shaped rib 4A, 4 unit member 8 positioning part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masato Suzuki 6-61, Imafukunishi, Joto-ku, Osaka-shi, Osaka Matsushita Seiko Co., Ltd.

Claims (2)

[Claims] 1. A flat plate made of paper or the like, ribs provided in a substantially S shape so that a parallel flow path through which a heat medium flows is formed on one surface of the plate, and both ends on the back surface of the plate. A unit member integrally formed with a resin in the vicinity is provided integrally with a rib obliquely intersecting the rib on the surface and provided in a substantially S-shape so that a counterflow portion is formed in the central portion. A heat exchange element that is provided so that the ribs on the front surface and the back surface that are provided in the part intersect with each other, and is laminated via cutting plates such as paper. 2. An engaging member or an engaging hole is formed on the front surface side and the rear surface of the unit member, respectively, and on the rib so that the engaging member engages with the engaging hole at the time of stacking and is positioned at the time of stacking. The heat exchange element according to claim 1, wherein positioning portions are provided at symmetrical positions.