JPH11201666A - Heat-exchange element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat-exchange element, inexpensive and light in weight, to reduce incurring of a pressure loss, and besides to reduce the occurrence of leakage and to increase heat-exchange efficiency. SOLUTION: A unit body U is formed such that a pair of heat transfer plates 2 and 2 parallel to each other and a space regulating member 3 to intercouple the heat transfer plates 2 and 2 and extend in the direction of a flow of an air current are integrally formed. A space regulating member 3 includes a plurality of beam plate parts 4 parallel to each other. Since a structure strength is high, the thickness of the beam plate part 4 can be decreased, resulting in reduction of incurring of a pressure loss. besides, the heat transfer area of the heat transfer plate 2 is widened and heat-exchange efficiency is increased. As a result of the high sealability between the heat transfer plates, the surfaces of which are laminated with each other, the occurrence of leakage of an air current is reduced. The unit bodies U are laminated without being adhered to each other to form a heat-exchange element, and a cost required for adhesion is reduced and a manufacturing cost is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a heat exchange ventilator and other air conditioners, and causes heat exchange between two kinds of airflows flowing through a heat transfer plate through the heat transfer plate. It relates to a heat exchange element.

[0002]

2. Description of the Related Art Conventionally, as the above heat exchange element,
As shown in FIG. 8, there is a heat exchange element 32 in which a flat heat transfer plate 30 and a so-called corrugated plate 31 having a cross-sectional waveform made of paper are alternately stacked while being adhered to each other. On the other hand, as shown in FIG. 9, a unit formed by integrating a heat transfer plate 33 made of paper and a plurality of resin-made solid ribs 34 arranged on the surface of the heat transfer plate 33 in parallel in one direction. There is a heat exchange element 36 in which the bodies 35 are laminated while being bonded alternately at an angle of 90 °.

[0003]

In the former heat exchange element 32, the heat transfer plate 30 and the corrugated plate 31 come into surface-to-line contact and have a small sealing area, so that bonding is required. As a result, it takes time and effort during manufacturing, and the manufacturing cost is high. In particular, when a sensible heat exchange element is formed using a resin sheet as a heat transfer plate, it takes a long time to dry because moisture and solvent do not escape during bonding.

[0004] Further, the corrugated plate 31 is liable to be deformed such that the height of the corrugation is reduced, and the pressure loss tends to increase. Further, when deformed, it is difficult to stack, and it is difficult to control the number of stacked layers. Furthermore, the bonding between the top portion of the corrugated plate 31 and the heat transfer plate 30 is bonding between the surface and the line, and the bonding area is small, so that the bonding strength is low. For this reason, there is a possibility that airflow leakage may occur due to peeling of the adhesive under high humidity due to condensation or the like.

On the other hand, in the latter heat exchange element 36,
In order to secure the strength, the width of the solid rib 34 must be widened. As a result, the weight becomes heavy and the heat transfer plate 3
The heat transfer area of No. 3 becomes narrow, and the heat exchange efficiency becomes poor. The present invention has been made in view of the above problems, and is a heat exchange element that is lightweight, can maintain high heat exchange efficiency for a long period of time, and has low pressure loss and low airflow leakage, and can also reduce manufacturing costs. The purpose is to provide.

[0006]

Means for Solving the Problems As means for solving the problems to achieve the above object, the aspect of the invention described in claim 1 is as follows.
In a heat exchange element for exchanging heat between two airflows flowing in an intersecting manner, the heat exchange element includes a plurality of unit bodies stacked alternately alternately by 90 °, and each unit body includes a pair of heat transfer units arranged in parallel. It is characterized by including a plate and an interval regulating member that connects the heat transfer plates to each other to regulate the interval between the heat transfer plates and extends in the flow direction of the air flow.

[0007] In this aspect, since the pair of heat transfer plates are connected by the spacing member in the unit body, the structural strength of the unit body is high. Therefore, even if the spacing member, which is an element of the unit body, is thin, it is sufficient. Strength can be secured. As a result, the thickness of the space regulating member along the flow direction of the air flow can be reduced, so that the pressure loss can be reduced in combination with the fact that the unit body is hardly deformed. Further, since the heat transfer area of the heat transfer plate can be increased by reducing the thickness of the space regulating member, the heat exchange efficiency can be increased. Further, since the unit is hardly deformed, it is easy to handle at the time of lamination.

As described above, the heat transfer plates adjacent to each other which are hardly deformed are joined face to face, and the flatness of the joined heat transfer plates is increased, so that the adhesion at the mating faces is improved. As a result, the sealing performance can be improved, and as a result, airflow leakage can be reduced. Therefore, it is also possible to form a heat exchange element by laminating the unit bodies without bonding them, and in this case, it is possible to reduce the cost of bonding and reduce the manufacturing cost, and for example, under high humidity. There is no danger of airflow leakage due to adhesion deterioration.

According to a second aspect of the present invention, in the first aspect, the pair of heat transfer plates and the gap regulating member are integrally formed. In this embodiment, since the compressive strength of the unit bodies becomes extremely high, the unit bodies are not deformed at the time of lamination, so that the units can be laminated with high accuracy. A third aspect of the present invention is characterized in that, in the first or second aspect, the units are stacked in a state in which adhesion between adjacent heat transfer plates of adjacent units is avoided. Things.

In this aspect, since the heat transfer plates are joined together and sealed face-to-face, sufficient sealing properties can be ensured without bonding the heat transfer plates. Since the bonding can be made unnecessary, no adhesive is required, the assembly speed can be remarkably improved, and the manufacturing cost can be reduced. Since there is no bonding portion, there is no possibility that the sealing property is reduced due to the deterioration of the bonding portion.

[0011] The aspect of the invention described in claim 4 is claim 1.
(2) or (3), wherein the gap regulating member includes a plurality of girder members arranged in parallel along one direction. According to this aspect, it is possible to secure sufficient strength of the unit body by the girder plate material. According to a fifth aspect of the present invention, in the fourth aspect, the pair of heat transfer plates and the plurality of girder plates are formed integrally by extrusion.

In this aspect, since the compressive strength of the unit bodies is extremely high, the unit bodies are not deformed at the time of lamination, and as a result, the layers can be laminated with high accuracy. Further, since extrusion molding is used, the production cost can be extremely reduced. According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the heat transfer plate has a thickness of 0.01 to 0.01.
It is characterized by being 0.4 mm.

In this aspect, the thickness of the heat transfer plate is 0.01 to
If it is within the range of 0.4 mm, 2
High heat exchange efficiency can be achieved even if the sheets are stacked.
If it is less than 0.01 mm, the strength becomes weak, and if it exceeds 0.4 mm, the heat transfer becomes poor. In particular, considering productivity in the above range, 0.13 to 0.1
A range of 5 mm is preferred.

[0014] The aspect of the invention described in claim 7 is the fourth aspect of the invention.
In 5 or 6, the thickness of the girders is 0.01 to 1 m.
m. In this aspect,
Since the thickness of the girder plate portion is 0.01 to 1 mm, the cross-sectional area of the air flow path and the heat transfer area of the heat transfer plate can be ensured while securing sufficient strength, and material costs are reduced. be able to. High heat exchange efficiency can be achieved.
If it is less than 0.01 mm, the strength is weak, and if it exceeds 1 mm, the heat transfer area of the air flow path is also small. In consideration of productivity in the above range, 0.0
A range of 8 to 0.12 mm is preferred.

According to an eighth aspect of the present invention, in any one of the fourth to seventh aspects, an interval L between adjacent beam members included in each unit and an interval H between a pair of heat transfer plates are included. Is L / H of 1 to 10.
In this embodiment, since the above L / H is in the range of 1 to 10, high heat exchange efficiency and high strength can be achieved. When L / H is less than 1, the space between the spar plates becomes relatively narrow and the pressure loss increases, and when L / H exceeds 10, the pressure loss decreases but the strength decreases.
It was set in the above range.

According to a ninth aspect of the present invention, in any one of the first to seventh aspects, one of the pair of heat transfer plates included in each unit has an annular shape with only a peripheral edge. It is assumed that. In this embodiment, one of the heat transfer plates is formed in an annular shape while leaving only the peripheral edge, which is a necessary portion as a sealing surface, so that material costs can be reduced and manufacturing costs can be reduced. Further, since the central region of the one heat transfer plate is eliminated, the number of heat transfer plates substantially contributing to heat exchange can be reduced to one, and the heat exchange efficiency can be improved.

An embodiment of the invention described in claim 10 is the first embodiment.
In any one of the first to ninth aspects, the heat transfer plate is made of a resin or a metal that prevents humidity exchange. In this embodiment, by using a resin such as polypropylene or a metal such as aluminum as the heat transfer plate, it is possible to prevent humidity exchange and to be suitable as a sensible heat exchange element.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic exploded perspective view of a heat exchange element according to an embodiment of the present invention, and FIG.
FIG. 3 is an exploded perspective view in which main parts of the heat exchange element are enlarged. In the present embodiment, the present invention will be described based on an example in which the present invention is applied to a sensible heat exchange element. However, the present invention is not limited to this, and the present invention can be applied to a total heat exchange element.

Referring to FIGS. 1 and 2, the present heat exchange element 1 is of a cross-flow type in which two types of air flows X and Y to be heat-exchanged flow in directions orthogonal to each other. The heat exchange element 1 is formed by laminating a large number of unit bodies U alternately by 90 °. Each unit body U has a pair of heat transfer plates 2 and 2 arranged in parallel, and connects these heat transfer plates 2 and 2 to each other to regulate an interval between the heat transfer plates 2 and 2 and to provide an airflow X (Or Y) in the flow direction. In the adjacent unit bodies U, U, a pair of adjacent heat transfer plates 2, 2 are combined, and the two types of airflows X, Y are interposed via the pair of combined heat transfer plates 2, 2. The heat exchange takes place. When stacking the unit bodies U, the heat transfer plates 2 and 2 are stacked so that the heat transfer plates 2 and 2 are face-to-face and the bonded heat transfer plates 2 and 2 are not bonded to each other.

In the present heat exchange element 1 as a sensible heat exchange element, the heat transfer plate 2 is made of a resin (for example, polypropylene resin) or a metal (for example, aluminum) that prevents humidity exchange. Referring to FIG. 3, if the thickness A of the heat transfer plate 2 is in the range of 0.01 to 0.4 mm, high heat exchange efficiency is achieved even when two sheets are stacked while securing sufficient strength. It is preferable in that it can be performed. This is because if the thickness A of the heat transfer plate 2 is less than 0.01 mm, the strength will be weak, and if it exceeds 0.4 mm, the heat transfer will be poor. If productivity is considered within the above range,
A range of 0.13 to 0.15 mm is preferred.

The space regulating member 3 is composed of a plurality of girder members 4 arranged in parallel along one direction and spaced apart from each other by a predetermined distance. The pair of heat transfer plates 2 and 2 and the plurality of girders 4 forming the unit body U are integrally formed by extrusion molding. A ventilation hole 5 is formed between the pair of heat transfer plates 2, 2 and is defined by adjacent beam members 4, 4.

Referring to FIG. 3, if the thickness B of the girder plate member 4 is in the range of 0.01 to 1 mm, the cross-sectional area of the air flow path and the transfer of the heat transfer plate are ensured while ensuring sufficient strength. This is preferable in that a large heat area can be ensured, material costs can be reduced, and high heat exchange efficiency can be achieved. This is because if the thickness B of the girder plate member 4 is less than 0.01 mm, the strength becomes weak, and if it exceeds 1 mm, the heat transfer area of the air flow path also becomes narrow. In addition, considering productivity within the above range, 0.08 to 0.12
The range of mm is preferred.

In the unit body U, the ratio L / H of the distance L between the adjacent beam members 4 and 4 and the distance H between the pair of heat transfer plates 2 and 2 is in the range of 1 to 10. It is preferable that high heat exchange efficiency and high strength can be achieved. That is, when L / H is less than 1, the space between the girder plates becomes relatively narrow, so that the pressure loss increases.
When / H exceeds 10, the pressure loss is reduced, but the strength is reduced.

According to the present embodiment, the following operation and effect can be obtained. That is, since the unit body U is formed by connecting the pair of heat transfer plates 2 and 2 with the plurality of girder plate members 4 serving as the interval regulating members, the strength of the structure of the unit body U is high.
Therefore, the thickness of the girder plate 4 can be reduced while ensuring the strength of the unit body U. As described above, in addition to making the girder plate member 4 thinner and increasing the cross-sectional area of the ventilation hole 5, the unit body U itself is hardly deformed and the ventilation hole 5 does not become fogged. Loss can be reduced. Further, since the heat transfer area of the heat transfer plate 2 can be secured widely by reducing the thickness of the beam plate member 4, the heat exchange efficiency can be increased. Further, since the unit body U is not easily deformed, there is an advantage that it is easy to handle and assemble at the time of lamination.

Further, the adjacent heat transfer plates 2, 2 of the unit bodies U, U, which are not easily deformed, are joined face to face, and the flatness of the joined heat transfer plates 2, 2 is increased. ,
As a result, the airtightness can be reduced as a result of improving the adhesion on the mating surface and improving the sealing performance. Therefore,
It is also possible to constitute the heat exchange element 1 by laminating the unit bodies U, U without adhering each other. In this case, it is possible to reduce the cost for adhesion and reduce the production cost, and also to reduce the cost for high humidity. There is no danger of airflow leakage due to adhesion deterioration below.

In the above embodiment, the heat transfer plates 2 and 2 and the girder plate portion 4 as the space regulating member 3 are integrally formed. However, as shown in FIG. May be formed separately and adhered to each other (or thermally fused). In this case, as shown in FIG. 5, each of the girder plate portions 4 is integrally formed with a pair of heat transfer plates 2 and 2 via a plate-like connecting portion 6 which is joined to each other. It is preferable to use the space regulating member 3A. In this case, the gap regulating member 3
Since A can be handled integrally, there is an advantage that the joining operation is easy to perform, and since a large joint area between the connecting portion 6 and the heat transfer plate 2 can be secured, the joining force is strong.

Further, in each of the embodiments shown in FIGS. 1, 4 and 5, the beam plate portion 4 is orthogonal to the heat transfer plate 2.
As shown in FIG. 6, each heat transfer plate 2 is alternately inclined in the opposite direction.
In cooperation with the above, the space regulating member 3B provided with 7, 8 having a triangular frame structure can be formed integrally with the pair of heat transfer plates 2, 2. An opening 5 for flowing an air current is formed between the adjacent girders 7 and 8. In this embodiment,
Since the triangular frame structure is used, the strength of the unit body U can be further improved.

Further, as shown in FIG. 7, one of the heat transfer plates 2 included in the unit body U can be omitted from the central region while leaving only a rectangular annular peripheral portion 2a required as a sealing surface. In this case, material costs can be reduced and manufacturing costs can be reduced. In addition, since the central region of the one heat transfer plate 2 is omitted, heat can be substantially exchanged through one heat transfer plate 2, and the heat exchange efficiency can be improved.

The present invention is not limited to the above embodiments. For example, when the present invention is applied to a total heat exchange element, the heat transfer plate 2 is made of a material having moisture permeability and moisture absorption, For example, it may be made of paper or a material containing paper. In addition, various changes can be made within the scope of the present invention.

[0030]

According to the first aspect of the present invention, since the structural strength of the unit body in which the pair of heat transfer plates is connected by the space regulating member is high, the thickness of the space regulating member along the flow direction of the air flow can be reduced. The pressure loss can be reduced. Further, since the heat transfer area of the heat transfer plate can be increased by reducing the thickness of the gap regulating member, the heat exchange efficiency can be increased.

Adjacent heat transfer plates of the unit bodies that are hardly deformed are joined face to face, so that the sealing performance between them can be improved. As a result, airflow leakage can be reduced. Therefore, it is also possible to form a heat exchange element by laminating the unit bodies without bonding them, and in this case, it is possible to reduce the cost of bonding and to reduce the manufacturing cost, and for example, to deteriorate the bonding under high humidity. There is no risk of airflow leakage due to the above.

According to the second aspect of the present invention, since the compressive strength of the unit bodies is very high, the unit bodies are not deformed at the time of lamination, and thus the units can be laminated with high accuracy. According to the third aspect of the invention, since the heat transfer plates are joined together and sealed face-to-face, sufficient sealing properties can be ensured without bonding the heat transfer plates. Since the bonding can be made unnecessary, no adhesive is required, the assembly speed can be remarkably improved, and the manufacturing cost can be reduced. Since there is no bonding portion, there is no possibility that the sealing property is reduced due to the deterioration of the bonding portion.

According to the fourth aspect of the invention, a sufficient strength of the unit body can be secured by the girder plate material. Claim 5
In the described invention, since the compressive strength of the unit bodies becomes extremely high, the unit bodies are not deformed at the time of lamination, so that the units can be laminated with high accuracy. Further, since extrusion molding is used, the production cost can be extremely reduced.

According to the sixth aspect of the present invention, when the thickness of the heat transfer plate is in the range of 0.01 to 0.4 mm, high heat exchange efficiency can be achieved while securing sufficient strength. In particular, considering productivity in the above range, 0.13 to 0.1
A range of 5 mm is preferred. In the invention according to claim 7, since the thickness of the girder plate portion is 0.01 to 1 mm, it is possible to secure a large cross-sectional area of the air passage and a large heat transfer area of the heat transfer plate while securing sufficient strength. And material costs can be reduced. High heat exchange efficiency can be achieved. Considering productivity in the above range, 0.08 to 0.12 m
The range of m is preferred.

In the invention according to claim 8, the L / H is 1
Since the range is from 10 to 10, high heat exchange efficiency and high strength can be achieved. According to the ninth aspect of the present invention, one of the heat transfer plates is formed in an annular shape while leaving only the peripheral edge, which is a necessary portion as a sealing surface, so that material costs can be reduced and manufacturing costs can be reduced. Further, since the central region of the one heat transfer plate is eliminated, the number of heat transfer plates substantially contributing to heat exchange can be reduced to one, and the heat exchange efficiency can be improved.

According to the tenth aspect, by using a resin such as polypropylene or a metal such as aluminum as the heat transfer plate, it is possible to prevent humidity exchange.
It becomes suitable as a sensible heat exchange element.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view of a heat exchange element according to an embodiment of the present invention;

FIG. 2 is an enlarged perspective view of a main part of the heat exchange element.

FIG. 3 is a side view of a unit body.

FIG. 4 is a partially broken perspective view of a unit body of a heat exchange element according to another embodiment of the present invention.

FIG. 5 is a partially broken perspective view of a unit body of a heat exchange element according to still another embodiment of the present invention.

FIG. 6 is a partially broken perspective view of a unit body of a heat exchange element according to still another embodiment of the present invention.

FIG. 7 is a partially broken perspective view of a unit body of a heat exchange element according to still another embodiment of the present invention.

FIG. 8 is a schematic perspective view showing an example of a conventional heat exchange element.

FIG. 9 is a schematic perspective view showing another example of the conventional heat exchange element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchange element U unit body 2 Heat transfer plate 2a Peripheral part 3, 3A, 3B Interval regulating member 4, 7, 8 Girder plate part 5 Vent hole 6 Connecting part

Claims (10)

[Claims] 1. A heat exchange element for exchanging heat between two cross-flow air streams (X, Y), wherein a plurality of unit bodies stacked alternately by 90 ° in different directions.
(U,…), and each unit (U) is a pair of heat transfer plates (2) (2) arranged in parallel.
And heat transfer plates (2) and (2)
(2) A heat exchange element characterized by including a space regulating member (3) for regulating the space between (2) and extending in the direction of air flow. 2. A pair of heat transfer plates (2) and (2) and an interval regulating member.
3. The method according to claim 1, wherein (3) is formed integrally.
A heat exchange element as described. 3. Adjacent heat transfer plates of adjacent unit bodies (U) (U)
(2) The heat exchange element according to (1) or (2), wherein the unit bodies (U) are laminated in a state in which adhesion between the (2) is avoided. 4. A heat exchanger according to claim 1, wherein said spacing member comprises a plurality of girder members arranged in parallel along one direction. element. 5. The pair of heat transfer plates (2) and (2) and a plurality of girder plates.
The heat exchange element according to claim 4, wherein (4) and (4) are integrally formed by extrusion molding. 6. The heat transfer plate (2) has a thickness of 0.01 to 0.4.
The heat exchange element according to any one of claims 1 to 5, wherein the distance is in mm. 7. The girder plate (4) has a thickness of 0.01 to 1 mm.
The heat exchange element according to claim 4, 5 or 6, wherein 8. Adjacent girders included in each unit (U)
(4) The ratio L / H of an interval L between (4) and an interval H between the pair of heat transfer plates (2) and (2) is 1 to 10.
8. The heat exchange element according to any one of items 7 to 7. 9. A pair of heat transfer plates (2) included in each unit (U)
The heat exchange element according to any one of claims 1 to 7, wherein one of (2) is formed in an annular shape with only a peripheral edge. 10. The heat transfer plate (2) is made of a resin or a metal for preventing humidity exchange.
The heat exchange element according to any one of the above.