JPH0842988A - Heat exchange element - Google Patents

Abstract

(57) [Summary] [Structure] This heat exchange element is composed of a plurality of unit members U1 to U3.
Are alternately laminated by shifting the direction by 90 °. The unit members U1 to U3 are a plate-shaped liner 1, a shielding rib 2 protruding upward along a pair of end edges of the liner 1, a spacer 3 for regulating a space between the liners 1, and a liner 1 other. And a cover 6 that extends downward along the edges of the pair of sheets, and is made entirely of paper and is press molded. Cover 6 of upper unit member U1
Covers the outer surface 2a of the rib 2 of the lower unit member U2. [Effect] With the cover, the unit members can be positioned at the time of stacking and are easy to manufacture. A bent sealing surface can be formed by the liner, the cover and the rib, and the sealing performance is improved. It is light because it is made of paper.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange element which is used in a heat exchange ventilator and other air conditioners and which exchanges heat by sandwiching a plate liner.

[0002]

2. Description of the Related Art In recent years, it has been required to reduce the manufacturing cost of heat exchange elements. Conventionally, as this type of heat exchange element, there is one disclosed in Japanese Patent Publication No. 6-10587. As shown in FIG. 14, this heat exchange element is formed by stacking a plurality of unit members 100 alternately while shifting their directions by 90. Each unit member 100 is formed by integrally molding a plurality of rows of ribs 102 made of synthetic resin arranged on one surface of a rectangular plate-shaped liner 101 into the liner 101. The ribs 102 arranged in the section are configured as shielding ribs 102a for sealing the edge portions of the liners 101, and ribs 1 arranged at predetermined intervals between the shielding ribs 102a.
02 is configured as a space regulating rib (so-called spacer) 102b for regulating the space between the liners 101.

In the above heat exchange element, since the liner 101 and the ribs 102a and 102b are integrally molded by resin, the liner 101 and the ribs 102a and 102b are excellent in strength and are bonded together as if they were formed separately. Is unnecessary, and there is an advantage that the manufacturing cost can be reduced in this respect.

[0004]

However, the above heat exchange element has the following problems (1) to (3). Since the ribs 102a and the spacers 102b are formed of resin, the moisture permeability is inferior to that of paper, and as a result, the moisture vapor transmission efficiency is poor. Therefore, so-called total heat that exchanges both latent heat and sensible heat. There was a problem that it was not suitable as a replacement element. Further, since the ribs 102a and 102b are made of resin, there is a problem that they are heavy. Further, the strength of the edge portion of the liner 101 on the side where the shielding rib 102a is not arranged is insufficient, so that the unit member 10
The stacking work of 0s was difficult. In addition, the edge of the liner 101 and the shielding rib 102 of the adjacent unit member U
The sealing property with a depends on the adhesive strength between them,
Since the adhesive area itself is small, there is a problem that the adhesive strength and the sealing property are low. Further, when manufacturing the heat exchange element, the unit member 1
It was difficult to stack the No. 00 while accurately positioning each other. Therefore, the manufacturing efficiency was poor. The unit strength of the stacked unit members 100 was only bonded by bonding with a narrow bonding area, so the connection strength was weak. Therefore, the strength of the heat exchange element was insufficient. The heat exchanging element becomes heavy due to the shielding rib 102a and the interval regulating rib 102b being solid.
Further, there is a problem that the manufacturing cost is increased due to the increase in the amount of the raw material. In addition, the laminated unit members 100 are usually held by an element frame, and the element frame has an angled column frame along the edge corners of the laminated unit members 100 extending in the laminating direction. There is. However, since the bonding area of the edge portion of the unit member 100 is small, the adhesiveness and the sealing property are poor, and the airflow is mixed. In particular, when the liner expands and contracts according to the amount of water held by the liner, since the adhesiveness is poor as described above, a gap is likely to occur between the edge corner portion and the frame column. In order to prevent this, a sealing material or a filling material has been interposed between the edge corner portion and the frame pillar, but this has increased the manufacturing cost.

On the other hand, as disclosed in Japanese Patent Application No. 3-279793, there is provided a heat exchange element in which a rib formed on the front surface of the liner and a rib formed on the back surface of the liner can be engaged with each other. There is. However, even in the heat exchange element of the present publication, since the liner and the rib are separately bonded, the sealing performance depends on the bonding condition,
Therefore, there is a problem similar to the above that the sealing property is poor. Further, the heat exchange element of the present publication has the same problem as described above.

In view of the above-mentioned problems, the first object of the present invention is to provide a heat exchange element which is light in weight, excellent in moisture permeability, easy to manufacture and excellent in hermeticity. In view of the above problems, a second object of the present invention is to provide a heat exchange element in which unit members are firmly connected to each other and have excellent strength.

In view of the above-mentioned problems, a third object of the present invention is to provide a heat exchange element which has a small amount of material, is light, and has a low manufacturing cost. In view of the above,
A fourth object of the present invention is to provide a heat exchange element that can improve the sealing performance between the edge corners of the unit members stacked in the stacking direction and the element frame at low cost.

[0008]

[Means and Actions for Solving the Problems]

(1) In order to achieve the first object, the heat exchange element according to claim 1 is formed by stacking unit members in multiple stages while alternately staggering the directions by 90 °, and the gases to be heat exchanged with each other. In the heat exchange element that flows in the intersecting direction, the unit member is provided on each of the plate-shaped liner containing the paper material and one of the opposite edge portions of the liner, and the liners of the unit members that are adjacent to each other in a stacked state are provided. A pair of ribs that seal between the opposing edge portions, a cover that is provided at each of the other opposing edge portions of the liner in a bent shape with respect to the liner, and that can cover the side surface of the rib of the adjacent unit member, A spacer provided on the liner for restricting a distance between the liners adjacent to each other in a laminated state of the unit members, and the liner, the rib, the cover and the spacer are integrally formed of paper. And it is characterized in that consists of things.

According to the above structure, since the cover can improve the rigidity of the edge portion of the liner, the edge portion of the liner does not wobble when the unit members are stacked, and the cover of one unit member and the adjacent unit member. Since both unit members can be positioned with the rib covered by the cover of
Easy to stack. Further, since the liner and the bent cover with respect to the liner come into contact with the ribs to form a bent sealing surface, the sealing performance at the edge of the liner is improved. Furthermore, it is light because it is entirely paper.

In addition, since the spacer and the liner are integrally molded, the combined strength of both is strong as a whole. Therefore, the number of spacers can be reduced while ensuring sufficient strength. As a result, the distance between the spacers can be increased, and as a result, the ventilation resistance due to the spacers can be reduced. Further, since the spacers are made of paper and can contribute to temperature exchange and humidity exchange, the temperature exchange efficiency and the humidity exchange efficiency can be increased as compared with the spacers made of resin. (2) In order to achieve the first object, the heat exchange element according to claim 2 is the heat exchange element according to claim 1, wherein the liner, the rib, the cover, and the spacer are formed by papermaking. It is characterized by.

According to the above construction, since the liner and the like include a paper material formed by papermaking, a liner excellent in moisture permeability can be obtained as compared with the case where the liner and the like are integrally molded with resin. be able to. In addition, since the ribs and the like are formed in the step of forming the raw material of the liner called papermaking (papermaking), it is possible to obtain a unit member having a strong integration between the liner and the ribs and the like and high strength. Further, in the case of papermaking, the thickness of the paper can be increased only in a necessary portion, and the partial strength can be freely set. (3) In order to achieve the first object, the heat exchange element according to claim 3 is the heat exchange element according to claim 1, wherein the liner, the rib, the cover and the spacer are formed by press molding. It is characterized by.

According to the above construction, since it is press molding, it can be manufactured efficiently. (4) In order to achieve the object of the above 1, the heat exchange element according to claim 4 is the heat exchange element according to any one of claims 1 to 3, wherein the heat exchange element is extended to a side surface of the rib and is adjacent to the unit. It is characterized in that a positioning extension portion is provided for restricting movement of an adjacent unit member in a direction along the rib by contacting an end surface of the rib of the member.

According to the above structure, the extending portion of one unit member is brought into contact with the end surface of the rib of the adjacent unit member so that the adjacent unit member is restricted in the direction along the rib (movement regulation by positioning by the cover). It can be positioned so that it does not move in the direction orthogonal to the direction). Therefore, the positioning can be performed in two orthogonal directions in combination with the position regulation by the cover, and the unit members can be more easily stacked at the time of manufacturing the heat exchange element. (5) In order to achieve the first object, the heat exchange element according to claim 5 is the heat exchange element according to any one of claims 1 to 4, wherein the liner includes a rib of an adjacent unit member. A ridge that is fitted to and positions the inner surface is integrally formed, and the inner surface of the rib and the ridge that is fitted to the rib have a bent portion so that they can be positioned in two directions intersecting with each other. It is characterized by being matched.

According to the above construction, the ribs and the ridges are aligned with each other so that the ribs can be positioned in two directions intersecting with each other. As a result, the positioning can be ensured. When manufacturing the heat exchange element, the unit members can be stacked more easily. (6) In order to achieve the second object, the heat exchange element according to claim 6 is the heat exchange element according to any one of claims 1 to 5, wherein the extending portion and the cover are continuously formed. The corners are connected to each other by fitting the inner surface of the corner formed between the two to the outer surface of the corner of the adjacent unit member.

According to the above structure, since the corners of the unit members are connected to each other, the connection is strong and a heat exchange element having high strength can be obtained. (7) In order to achieve the fourth object, the heat exchange element according to claim 7 is the heat exchange element according to claim 6, wherein an element main body formed of a laminate of the unit members, and the element main body is held. And an element frame for adhering to each other, the element frame is formed by stacking an angle-shaped frame column adhered to each edge corner portion along the edge corner portion extending in the stacking direction of the element body and the element body. It is characterized by including a pair of end face plates that connect the ends of the frame pillars in a state of being sandwiched in the direction.

According to the above structure, since the edge corners extending in the stacking direction of the element body are formed by connecting the corners of the unit members, the adhesion of the unit members at the edge corners is high, Moreover, it is possible to secure a wide bonding surface (that is, a sealing surface) between the edge corner portion and the angle-shaped frame pillar. As a result, the sealing performance can be improved at low cost without using a sealing material or the like. Moreover,
Since the adhesive strength between the edge corner portion and the frame pillar is high, even if the liner dries and contracts, there is no gap between the edge corner portion and the frame pillar, and the sealing performance is high. (8) In order to achieve the third object, the heat exchange element according to claim 8 is the heat exchange element according to any one of claims 1 to 6, wherein at least one of the rib and the spacer has a hollow cross section. It is characterized in that it is formed in.

According to the above construction, the weight of the heat exchange element can be reduced. Moreover, since the hollow inner surface can also contribute to heat transfer, heat transfer efficiency can be improved.

[0018]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 1 is a schematic exploded perspective view of a main part of a heat exchange element according to an embodiment of the present invention, and FIG. 2 is a unit member thereof.
It is a schematic sectional drawing which follows the II-II line. With reference to FIG. 1, this heat exchange element is a cross-flow type in which fluids to be heat-exchanged flow in directions orthogonal to each other, and a plurality of unit members U are provided.
A plurality of 1 to U3 are laminated by alternately changing their directions by 90 °. Actually, a plurality of unit members are laminated, but three unit members are shown for simplification.

Referring to FIGS. 1 and 2, each unit member U1
U3 is a rectangular flat plate-like liner 1, a pair of ribs 2 projectingly formed on a pair of opposed edges of the upper surface 1a of the liner 1, and a predetermined interval in parallel with the rib 2 on the upper surface 1a of the liner 1. A plurality of spacers 3 that are arranged integrally with the liner 1 and extend downward from the opposite edges of the other pair of the liner 1 and cover the outer surface 2a of the rib 2 of the adjacent unit members U1 to U3. And a cover 6 that can be used.

Of the two airflows that are heat-exchanged with the liner 1 interposed therebetween, the one airflow that flows along the upper surface 1a (the surface of the liner 1 on the spacer 3 side) is along the longitudinal direction of the spacer 3. The airflow that is caused to flow along the lower surface of the liner 1 (the surface where the spacer 3 is not provided) is in the direction orthogonal to the longitudinal direction of the spacer 3 (that is, in the longitudinal direction of the spacer 3 of the lower unit member). Will be washed away.

The liner 1, the rib 2, the spacer 3 and the cover 6 which form each unit member U1 to U3 are integrally formed by press molding. The material forming the unit members U1 to U3 is not limited to the paper material, and various fibrous materials can be used. Further, in order to reinforce the structure, an appropriate amount of resin fiber is added to the paper material. It is also possible to use a mixture. The liner 1 has a thickness of 0.
For example, one having a size of about 1 mm can be used.

As shown in FIG. 2, the rib 2 has a rectangular parallelepiped shape and is hollow inside. The height of the rib 2 may be about 2 mm. The upper surface of the rib 2 is formed into a flat surface, and as shown in FIG. 4, it comes into close contact with the other surface of the liner 1 of the adjacent unit member U. Further, referring to FIG. 1 and FIG. 5, extension portions 7 extending downward in a triangular shape are formed on outer side surfaces 2 a of both ends of the rib 2. Referring to FIG.
The extending portion 7 of the upper unit member U1 is provided with the lower unit member U2.
Of the rib 2 is abutted against the end surface 2b of the rib 2 and the lower unit member U2 is moved in the direction along the rib 2 (the direction orthogonal to the paper surface in FIG. 5, which corresponds to the Y1 and Y2 directions in FIG. 1). regulate. On the other hand, referring to FIG.
And the cover 6 are continuously formed, and the inner surface of the corner portion 8 of the unit member U1 formed between them is fitted to the outer surface of the corner portion 8 of the lower unit member U2, whereby the corner portion is formed. 8 are connected to each other.

The cover 6 is provided in a bent shape with respect to the liner 1. As shown in FIG. 4, the liner 1 and the bent cover 6 are adjacent to each other in the unit member U.
By contacting the outer surface 2a of the rib 2 of 1 to U3,
A bent sealing surface is formed.
With reference to FIGS. 1 and 2, the spacer 3 is formed of a ridge having a chevron-shaped cross section and has a hollow interior. That is, on the lower surface 1b of the liner 1, the back side of the spacer 3 is
It is formed in the concave stripe 4 having a cross-sectional shape along the cross-sectional shape of the convex stripe.

As shown in FIG. 2, the tops of the spacers 3 are formed to have an acute angle so that the area where the spacers 3 contact the heat transfer surface of the adjacent (upper) liner 1 is reduced and the liner 1 is wide. Heat transfer area (area that can contact the air flow)
It is preferable for ensuring. Further, referring to FIG. 1, the end portion of each spacer 3 is separated from the end edge of the liner 1 by a predetermined distance. As a result, the lower surface of the end edge portion of the liner 1 and the rib 2 of the unit member U adhered thereto can be tightly adhered to each other so that airflow leakage does not occur. This is because when the edge portion of the liner 1 is bonded to the lower rib 2, it is necessary to press them together (load an adhesive pressure), but the spacer 3 is attached to the edge portion of the liner 1.
Since the edge portion of the liner 1 can be uniformly pressed to the rib 2 side over the entire surface, as a result, the entire edge portion of the liner 1 can be tightly adhered to the rib 2 when adhering. Because you can

According to the above embodiment, the following operational effects are exhibited. That is, since the rigidity of the edge portion of the liner 1 can be improved by the cover 6, the edge portion of the liner 1 does not wobble when the unit members U1 to U3 are stacked, and the cover 6 of the one unit member U1.
Since both unit members U1 and U2 can be positioned between the outer surface 2a of the rib 2 of the unit member U2 and the unit member U2, which are combined with the unit member U2, the stacking work is easy. Further, since the liner 1 and the bent cover 6 of one unit member U1 contact the ribs 2 of the adjacent unit member U2, a bent sealing surface is formed, so that the liner 1 at the edge portion Sealability is improved. Furthermore, it is light because it is entirely paper. Since the liner 1 and the like are formed by press molding, the unit members U1 to U3 and thus the heat exchange element can be efficiently manufactured. By bringing the extending portion 7 of one unit member U1 into contact with the end surface 2b of the rib 2 of the adjacent unit member U2, the direction of the adjacent unit member U2 along the rib 2 (movement regulation by positioning by the cover 6) It can be positioned so that it does not move in the direction orthogonal to the direction). Therefore, it is possible to perform positioning in two orthogonal directions together with the position regulation by the cover 6, and it is possible to more easily stack the unit members U1 to U3 at the time of manufacturing the heat exchange element. Moreover, since the corners 8 of the unit members U1 to U3, which are formed by the extending portion 7 and the cover 6, are connected to each other, the connection is strong and a heat exchange element having high strength can be obtained. In addition, since the ribs 2 and the spacers 3 are hollow, it is possible to reduce the weight of the heat exchange element. Moreover, since the hollow inner surface can also contribute to heat transfer, heat exchange efficiency can be improved. In addition, since the spacer 3 and the liner 1 are integrally formed, the combined strength of both is strong as a whole. Therefore, the number of spacers 3 can be reduced while ensuring sufficient strength. As a result, the distance between the spacers 3 can be widened, and as a result, ventilation resistance due to the spacers 2 can be reduced, and energy saving and noise reduction can be achieved. Further, since the spacer 3 is made of paper and can contribute to temperature exchange and humidity exchange, the temperature exchange efficiency and the humidity exchange efficiency can be increased as compared with the spacer 3 made of resin.

In this embodiment, as shown in FIG. 6, the extension 7 may not be provided. 7 and 8 show another embodiment of the present invention. With reference to these drawings, the present embodiment is different from the embodiment of FIG.
The following are. Crepe paper was used as the liner 1. Thereby, the heat exchange efficiency could be improved. In addition, the paper was easily stretched during press molding, and was thus less likely to break. Make sure that the width of the rib 2 gradually increases at both ends so that the rib 2
The inner surface 2c of the rib 2 was bent at both ends of the. As a result, both ends of the rib 2 have a triangular shape in plan view. In this way, the inner side surface 2c of the rib 2 is bent at the end portion, and the bent inner side surface 2c of the rib 2 is fitted with a similarly bent ridge 9 described below. Therefore, the unit member can be positioned in two directions, that is, the direction along the spacer 3 and the direction orthogonal thereto, and the positioning can be performed more reliably. A ridge 9 is formed which protrudes toward the lower surface 1b of the liner 1 and is parallel to the cover 6 at a predetermined distance. Upper surface 1 of liner 1
A concave line 10 is formed on the a along the convex line 9. Both ends of the ridge 9 are bent along the shape of the inner surface 2c of the rib 2. In addition to the rigidity of the unit members U1 and U2 being improved by the ridge 9, as shown in FIG. 8, in the space between the ridge 9 of the upper unit member U1 and the cover 6, the lower unit member U2 is provided. By fitting the ribs 2 to each other, the upper and lower unit members U1 and U2 can be more firmly connected to each other, and the heat exchanging element having excellent strength can be obtained by combining them. Further, as described above, the positioning at the time of stacking can be performed more reliably, and the sealing surface has a U-shape, so that the sealing performance can be further improved.

FIG. 9 shows still another embodiment of the present invention. Referring to FIG. 9, this embodiment is different from the embodiment of FIG. 1 in that a reinforcing rib 11 having a trapezoidal cross section is provided in place of the spacer 3 at the center to reinforce the strength of the unit member, and By providing a plurality of hollow columnar protrusions 12 projecting downward and making the columnar protrusions 12 abut on the ends of the ribs 2, 11 and 2 of the unit member below, respectively, the airflow of the liner 1 is reduced. As a result, it is possible to prevent bending at the inlet and outlet portions, and to keep the inlet height and the outlet height constant, so that it is possible to prevent unnecessary increase in flow resistance of the air flow due to the bending. That is what you can do.

In this case, both ends of the rib 2 are made to project inward in a triangular shape to widen the width for the following reason. That is, without widening the ends of the ribs 2,
When the columnar protrusions 12 are provided at the end portions of the ribs 2, the columnar protrusions 12 of the upper unit member overlap with the hollow portions that are the back side (upper side) of the columnar protrusions 12 of the lower unit member, and form a pillar. Can no longer function. On the other hand, in this embodiment, since the end portions of the ribs 2 are wide, the columnar protrusions 12 are formed.
Can be disposed at a position separated from the end of the rib 2 by a predetermined distance, and the columnar projection 12 can be received by the triangular portion of the end of the lower rib 2. As a result, the upper and lower columnar protrusions 12 can be prevented from overlapping each other.

FIG. 10 shows still another embodiment of the present invention. Referring to the figure, the present embodiment differs from the embodiment of FIG. 1 in that hollow convex portions 13 projecting upward from the ribs 2 are provided at the four corners of the unit members U1 to U3, and the lower unit The convex portion 13 of the member U2 is fitted in the space below the convex portion 13 of the upper unit member U1. In this case, in addition to further improving the positioning performance during stacking,
The unit members U1 to U3 are more firmly connected to each other, and a heat exchange element having excellent strength can be obtained.

11 to 13 show another embodiment of the present invention. Referring to FIG. 11, the element body 200 is configured by the unit members U stacked in multiple stages, and the element body 200 is held by the element frame 300. The element body 200 is
The description is omitted because it is the same as the one described above. The element frame 300 is arranged along a pair of end face plates 310 (only the upper one is shown) arranged at both ends of the element body 200 in the stacking direction, and an edge corner 210 of the element body 200 extending in the stacking direction. An angled frame column 320 is attached to each edge corner 210 in a state.

The edge corner 210 is, as shown in FIG.
The corner portions 8 of the unit members U stacked in multiple stages are fitted and connected to each other. FIG.
3, the frame column 320 has an angled main body portion 33.
0 and the end plate 3 formed at both ends of the main body portion 330.
10 and a mounting plate 340 along which a screw insertion hole 350 is formed. The screw inserted through the screw insertion hole 350 is screwed to the end face plate 310, and the end face plate 310 and the frame column 320 are fixed. On the other hand, an adhesive is applied to the inner surface 330a of the main body 330 of the frame column 320, and the frame column 320 is bonded to the edge corner portion 210 of the element body 200 described above.

According to this embodiment, the element body 200
Are formed by connecting the corners 8 of the unit member U to each other, the unit members U are firmly adhered to each other at the corners 210, and at the same time, the edge corners 210 and the angled frame are formed. It is possible to secure a wide adhesive surface (that is, a sealing surface) with the column 320. As a result, the sealing performance can be improved at low cost without using a sealing material or the like. Moreover, since the adhesive strength between the edge corner portion 210 and the frame column 320 is high, even if the liner dries and contracts,
There is no gap between the edge corner 210 and the frame column 320, and the hermeticity is high. It should be noted that this embodiment can be applied to embodiments other than the embodiment of FIG.

In each of the above embodiments, the liner 1,
The rib 2, the spacer 3, the cover 6 and the like can be integrally formed by papermaking. In this case, since the ribs 2 and the spacers 3 are formed at the stage of forming the material of the liner 1 called papermaking (papermaking), the liner 1 and the ribs 2 and the spacers 3 are formed.
It is possible to obtain a unit member U having high strength with, and thus having high strength, and thus it is possible to realize a heat exchange element having high strength. In the case of papermaking,
The thickness of each part can be set freely, and the strength of the required part can be partially improved.

In addition, various design changes can be made without changing the gist of the present invention.

[0035]

According to the first aspect of the present invention, the cover can improve the rigidity of the edge portion of the liner. Therefore, the edge portion of the liner does not wobble when the unit members are stacked, and the cover of one unit member is covered. Since both unit members can be positioned between the ribs of the adjacent unit members covered by this cover, the stacking work is easy. As a result, the heat exchange element is easy to manufacture. Further, since the liner and the bent cover described above abut on the rib against the liner, a bent sealing surface is formed,
Improves sealing at the edge of the liner. Furthermore, it is light because it is entirely paper. In addition, since the spacer and the liner are integrally molded, the combined strength of both is strong as a whole, and therefore the number of spacers can be reduced while ensuring sufficient strength, which results in wide spacing between the spacers. As a result, the ventilation resistance due to the spacer can be reduced, and energy saving and noise reduction can be achieved. Further, since the spacers are made of paper and can contribute to temperature exchange and humidity exchange, the temperature exchange efficiency and the humidity exchange efficiency can be increased as compared with the spacers made of resin.

According to the second aspect of the invention, since the liner and the like include a paper material formed by papermaking, compared to the case where the liner and the like are integrally molded by resin,
It is possible to obtain a liner having excellent moisture permeability. In addition, since the ribs and the like are formed in the step of forming the raw material of the liner called papermaking (papermaking), it is possible to obtain a unit member having a strong integration between the liner and the ribs and the like and high strength. Further, in the case of papermaking, the thickness of the paper can be increased only in a necessary portion, and the partial strength can be freely set.

According to the invention of claim 3, since it is press molding, it can be manufactured efficiently. According to the invention of claim 4, the upper and lower unit members can be positioned with each other by abutting the extending portion of one unit member on the end surface of the rib of the adjacent unit member, so that it is more reliable. It can be positioned, and the unit members can be easily stacked when manufacturing the heat exchange element.

According to the fifth aspect of the present invention, the ribs and the bent portions of the ridges enable the positioning in two directions intersecting with each other. Therefore, the positioning is more reliable, and the unit member can be manufactured at the time of manufacturing the heat exchange element. Can be stacked easily. According to the invention of claim 6, the unit elements adjacent to each other are strongly connected to each other, and a heat exchange element having high strength can be obtained.

According to the invention of claim 7, the edge corners extending in the stacking direction of the element body are formed by connecting the corners of the unit members, and the close contact between the unit members at the edge corners is strong. In addition, it is possible to secure a wide adhesive surface (that is, a sealing surface) between the edge corner portion and the angle-shaped frame pillar. As a result, the sealing performance can be improved at low cost without using a sealing material or the like. In addition, since the adhesive strength between the edge corner portion and the frame pillar is high, even if the liner is dried and contracted, no gap is created between the edge corner portion and the frame pillar, and the sealing performance is high.

According to the invention of claim 8, the weight of the heat exchange element can be reduced. Further, since the hollow inner surface can also contribute to heat transfer, high heat exchange efficiency can be obtained.

[Brief description of drawings]

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

FIG. 2 is a schematic cross-sectional view of the unit member U1 of FIG. 1 taken along the X1 direction.

FIG. 3 is a partially cutaway perspective view of a main part of a unit member U1.

FIG. 4 is a vertical cross-sectional view of the main parts of the upper and lower unit members combined together.

FIG. 5 is a side view of the upper and lower unit members combined together.

FIG. 6 is a schematic exploded perspective view of essential parts of a heat exchange element according to another embodiment of the present invention.

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

8 is a cross-sectional view of essential parts showing a connected state of unit members of the heat exchange element of FIG. 7.

FIG. 9 is a perspective view of a unit member of a heat exchange element according to still another embodiment of the present invention.

FIG. 10 is a schematic exploded perspective view of essential parts of a heat exchange element according to still another embodiment of the present invention.

FIG. 11 is a schematic perspective view of a heat exchange element according to still another embodiment of the present invention.

12 is an exploded perspective view of a main part of the heat exchange element of FIG.

13 is a perspective view showing a frame column of an element frame of the heat exchange element of FIG. 11. FIG.

FIG. 14 is a schematic perspective view of a main part of a conventional heat exchange element.

[Explanation of symbols]

 U1 to U3 Unit member 1 Liner 1a Upper surface 2 Rib 2a Outer side surface 2b End surface 2c Inner side surface 3 Spacer 6 Cover 7 Extension part 8 Corner part 200 Element body 210 Edge corner part 300 Element frame 310 End face plate 320 Frame column

Claims (8)

[Claims] 1. A unit member (U) is formed by stacking the unit members (U) in multiple stages while alternately shifting the direction by 90 °.
In the heat exchange element in which gases to be heat-exchanged are caused to flow in a direction intersecting with each other, the unit member (U) includes a plate-like liner (1) containing a paper material and one edge of the liner (1) facing each other. And the liners (1) that are respectively provided in the
A pair of ribs (2) for sealing between the opposing edge portions of the liner (1) and the other opposing edge portions of the liner (1) are respectively provided in a bent shape with respect to the liner (1), and adjacent unit members (U). A cover (6) capable of covering the outer side surface (2a) of the rib (2) of FIG. 2) and the liner (1) provided on the liner (1) to regulate the interval between the liners (1) adjacent to each other in the laminated state of the unit members. A heat exchange element including a spacer (3), wherein the liner (1), the rib (2), the cover (6) and the spacer (3) are integrally formed of paper. 2. The heat exchange element according to claim 1, wherein the liner (1), the rib (2), the cover (6) and the spacer (3) are formed by papermaking. element. 3. The heat exchange element according to claim 1, wherein the liner (1), the rib (2), the cover (6) and the spacer (3) are formed by press molding. element. 4. The heat exchange element according to claim 1, wherein the ribs (2) of the adjacent unit members (U) are extended to the outer surface (2a) of the ribs (2). A heat exchange element comprising a positioning extension portion (7) which is in contact with an end surface and restricts movement of an adjacent unit member (U) in a direction along the rib (2). 5. The heat exchange element according to claim 1, wherein the liner (1) is provided with ribs (2) of adjacent unit members.
Is formed integrally with the inner surface (2c) of the rib (2c) for positioning the inner surface (2c) of the rib (2), and the inner surface (2c) of the rib (2) and the projection (9) fitted thereto are A heat exchange element, characterized in that it is fitted with bent parts so that it can be positioned in two directions intersecting with each other. 6. The heat exchange element according to claim 1, wherein the extending portion (7) and the cover (6) are continuously formed, and a corner formed between them. The heat exchange element characterized in that the corners (8) are connected to each other by fitting the inner surface of the part (8) to the outer surface of the corner (8) of the adjacent unit member (U1). 7. The heat exchange element according to claim 6, wherein the element body (20) comprises a laminate of the unit members (U).
0) and an element frame (300) for holding the element main body (200), and the element frame (300) includes the edge corners (21) extending in the stacking direction of the element main body (200).
(0) and the end of the frame pillar (320) with the angle-shaped frame pillar (320) adhered to each edge corner (210) and the element body (200) sandwiched in the stacking direction. A pair of end plates (310) that connect the parts together
And a heat exchange element characterized by including. 8. The heat exchange element according to claim 1, wherein at least one of the ribs (2) and the spacers (3) has a hollow cross section. element.