JP2020139650A - Heat exchange element and heat exchange-type ventilation device using the same - Google Patents

Abstract

To provide a heat exchange element capable of preventing heat exchange efficiency from being degraded due to a shape change of an air passage, and to provide a heat exchange-type ventilation device using the same.SOLUTION: In a heat exchange element 6, heat exchange element pieces 15 each provided with a heat transfer plate 13 having heat transfer properties and a plurality of ribs 14 disposed on one surface of the heat transfer plate 13 are stacked to form alternately a single layer of a discharge air passage 16 and a single layer of a supply air passage 17, so that heat exchange is performed between a discharge air flow 3 flowing through the discharge air passage 16 and a supply air flow 4 flowing through the supply air passage 17, via the heat transfer plate 13. The heat transfer plate 13 and the ribs 14 adhere to each other with an adhesive member. The ribs 14 are each formed from a plurality of fiber members having hygroscopic properties. The plurality of fiber members on a surface of a spacing member form a melt and adhered fiber-melt layer.SELECTED DRAWING: Figure 3

Description

The present invention is used in a cold region or the like, and is a heat exchange element that exchanges heat between an exhaust flow that exhausts indoor air to the outside and a supply air flow that supplies outdoor air to the room, and heat using the same. It relates to a replaceable ventilation system.

The heat exchange element used in this type of heat exchange type ventilator has, for example, the following in order to ensure reliability by improving the sealing property (sealing function for preventing air flowing through the air flow path from leaking to the outside). Such a structure is known (see, for example, Patent Document 1).

As shown in FIG. 8, the heat exchange element 101 is configured by laminating a large number of heat exchange element pieces 102 composed of a functional paper 103 having heat transfer properties and ribs 104. On one surface of the functional paper 103, a plurality of ribs 104 made of a paper string 105 and a hot melt resin 106 for adhering the paper string 105 to the functional paper 103 are provided in parallel at predetermined intervals. The ribs 104 form a gap between a pair of functional papers laminated adjacent to each other to form an air flow path 107. The heat exchange element 101 is formed so that a plurality of gaps are laminated, and the air flow directions of the respective air flow paths 107 in the adjacent gaps are configured to be orthogonal to each other. As a result, the air flow path 107 is alternately ventilated between the supply air flow and the exhaust flow for each functional paper 103, and heat exchange is performed between the supply air flow and the exhaust flow.

Japanese Unexamined Patent Publication No. 11-248390

In such a conventional heat exchange element 101, a rib 104 in which a substantially circular paper string 105 is wrapped with a hot melt resin 106 is formed, and the rib 104 is adhered to the functional paper 103 with the hot melt resin 106 to form the functional paper 103. It was configured to maintain the distance between each other. However, since the paper string 105 has low rigidity, it is easily bent by an external force or the like, and further expands when it absorbs moisture in the air, so that the adhesive surface between the functional paper 103 and the rib 104 is easily peeled off. These phenomena lead to a problem that the shape of the air flow path 107 cannot be maintained, so that the air flowing through the heat exchange element 101 is biased and the heat exchange efficiency is lowered.

Therefore, the present invention solves the above-mentioned conventional problems, and provides a heat exchange element capable of suppressing a decrease in heat exchange efficiency due to a change in the shape of the air passage and a heat exchange type ventilation device using the same. The purpose is to provide.

Then, in order to achieve this object, in the heat exchange element according to the present invention, a unit constituent member including a partition member having heat transfer property and a plurality of interval holding members provided on one surface of the partition member is laminated. The exhaust air passage and the air supply air passage are alternately configured one layer at a time, and the exhaust flow flowing through the exhaust air passage and the air supply air flowing through the air supply air passage are heat exchange elements that exchange heat through a partition member. Then, the partition member and the interval holding member are fixed to each other by the adhesive member. The space-holding member is composed of a plurality of hygroscopic fiber members, and the plurality of fiber members on the surface of the space-holding member form a fiber fusion layer that is melted and fixed.

According to the present invention, it is possible to provide a heat exchange element capable of suppressing a decrease in heat exchange efficiency due to a change in the shape of the air passage, and a heat exchange type ventilation device using the same.

FIG. 1 is a schematic view showing an installation state of the heat exchange type ventilation device according to the first embodiment of the present invention in a house. FIG. 2 is a schematic view showing the structure of the heat exchange type ventilator. FIG. 3 is an exploded perspective view showing the structure of the heat exchange element constituting the heat exchange type ventilator. FIG. 4 is a partial cross-sectional view showing the structure of the ribs constituting the heat exchange element. FIG. 5 is a partial cross-sectional view showing a method of manufacturing a rib having a fiber melt layer. FIG. 6 is a partial cross-sectional view showing a method of manufacturing a heat exchange element. FIG. 7 is a partial cross-sectional view showing a modified example of the structure of the ribs constituting the heat exchange element. FIG. 8 is an exploded perspective view of a conventional heat exchange element.

In the heat exchange element according to the present invention, an exhaust air passage and an air supply air passage are formed by stacking a unit constituent member including a partition member having heat transfer property and a plurality of interval holding members provided on one surface of the partition member. It is a heat exchange element that is composed of layers alternately, and the exhaust flow flowing through the exhaust air passage and the air supply air flowing through the air supply air passage exchange heat through a partition member. Then, the partition member and the interval holding member are fixed to each other by an adhesive member, the interval holding member is composed of a plurality of fiber members having hygroscopicity, and the plurality of fiber members on the surface of the interval holding member are melted and fixed. It has a structure that forms a fused fiber layer.

With such a configuration, the rigidity of the surface of the space-holding member is improved by the fiber fusion layer, so that the space-holding member is less likely to be deformed even if an external force or a change in temperature and humidity acts on the heat exchange element. That is, the air passage of the heat exchange element is less likely to be deformed as compared with the case where the fiber fusion layer is not provided on the surface of the spacing member. As a result, the bias of the air flowing through the heat exchange element is eliminated, and the air in the air passage of the heat exchange element can be blown at a uniform wind speed, so that the heat exchange efficiency of the heat exchange element can be maintained high. In other words, it can be a heat exchange element capable of suppressing a decrease in heat exchange efficiency due to a change in the shape of the air passage.

Further, the space-holding member preferably has a planar fiber melt layer on the adhesive surface with the partition member. As a result, the adhesive area between the interval holding member and the partition member is increased as compared with the case where the substantially circular interval holding member is used, so that the adhesive strength can be increased, and the interval holding member and the partition member can be separated from each other. It is possible to suppress the blockage of the air passage due to the peeling of the adhesive between them. That is, it is possible to obtain a heat exchange element that is less likely to cause peeling between the interval holding member and the partition member and can suppress a decrease in ventilation volume.

Further, it is preferable that a plurality of fiber members are exposed on the side surface of the spacing member. As a result, the moisture generated in the air passage can easily reach the internal fiber members through the exposed fiber members, so that the deformation of the partition member due to the moisture in the air passage can be further suppressed. That is, the heat exchange element can be a heat exchange element capable of suppressing a decrease in heat exchange efficiency due to a change in the shape of the air passage of the heat exchange element.

Further, the interval holding member may have a structure in which a plurality of fiber members are twisted. By twisting the fiber member, the tension of the space-holding member is increased, the dimensional change of the space-holding member due to moisture absorption is suppressed, and the air passage is suppressed from being blocked by the adhesive peeling of the space-holding member and the partition member. That is, it is possible to obtain a heat exchange element that is less likely to cause peeling between the interval holding member and the partition member and can suppress a decrease in ventilation volume.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
First, the outline of the heat exchange type ventilation device 2 provided with the heat exchange element 6 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic view showing an installation example of a heat exchange type ventilator 2 including a heat exchange element 6. FIG. 2 is a schematic view showing the structure of the heat exchange type ventilator 2.

In FIG. 1, a heat exchange type ventilation device 2 is installed indoors of the house 1. The heat exchange type ventilator 2 is a device that ventilates while exchanging heat between indoor air and outdoor air.

As shown in FIG. 1, the exhaust flow 3 is discharged to the outside through the heat exchange type ventilator 2 as shown by the black arrow. The exhaust flow 3 is a flow of air discharged from indoors to outdoors. Further, the air supply airflow 4 is taken into the room via the heat exchange type ventilation device 2 as shown by the white arrow. The air supply 4 is a flow of air taken in from the outside to the inside. For example, in winter in Japan, the exhaust stream 3 has a temperature of 20 to 25 ° C., whereas the air flow 4 may reach below freezing. The heat exchange type ventilation device 2 ventilates and transfers the heat of the exhaust flow 3 to the supply airflow 4 at the time of this ventilation to suppress the release of unnecessary heat.

As shown in FIG. 2, the heat exchange type ventilation device 2 includes a main body case 5, a heat exchange element 6, an exhaust fan 7, an inside air port 8, an exhaust port 9, an air supply fan 10, an outside air port 11, and an air supply port 12. ing. The main body case 5 is an outer frame of the heat exchange type ventilator 2. An inside air port 8, an exhaust port 9, an outside air port 11, and an air supply port 12 are formed on the outer periphery of the main body case 5. The inside air port 8 is a suction port for sucking the exhaust flow 3 into the heat exchange type ventilation device 2. The exhaust port 9 is a discharge port that discharges the exhaust flow 3 from the heat exchange type ventilation device 2 to the outside. The outside air port 11 is a suction port for sucking the air supply air 4 into the heat exchange type ventilation device 2. The air supply port 12 is a discharge port that discharges the air supply air 4 indoors from the heat exchange type ventilation device 2.

A heat exchange element 6, an exhaust fan 7, and an air supply fan 10 are mounted inside the main body case 5. The heat exchange element 6 is a member for exchanging heat between the exhaust flow 3 and the supply airflow 4. The exhaust fan 7 is a blower for sucking the exhaust flow 3 from the inside air port 8 and discharging it from the exhaust port 9. The air supply fan 10 is a blower for sucking the air flow 4 from the outside air port 11 and discharging it from the air supply port 12. The exhaust flow 3 sucked by the exhaust fan 7 is discharged to the outside from the exhaust port 9 via the heat exchange element 6 and the exhaust fan 7. Further, the air flow 4 sucked by the air supply fan 10 is supplied indoors from the air supply port 12 via the air supply fan 10.

Next, the heat exchange element 6 will be described with reference to FIGS. 3 and 4. FIG. 3 is an exploded perspective view showing the structure of the heat exchange element 6 constituting the heat exchange type ventilator 2. FIG. 4 is a partial cross-sectional view showing the structure of the rib 14 constituting the heat exchange element 6.

As shown in FIG. 3, the heat exchange element 6 is composed of a plurality of heat exchange element pieces 15 in which a plurality of ribs 14 are adhered on one surface of a substantially square heat transfer plate 13. The heat exchange element 6 is formed by stacking a plurality of heat exchange element pieces 15 in different directions so that the ribs 14 are orthogonal to each other step by step, so that the exhaust air passage 16 through which the exhaust flow 3 passes and the air flow 4 The air supply air passage 17 through which air is ventilated is formed, and the exhaust flow 3 and the air supply air 4 flow alternately at right angles with each other, enabling heat exchange between them.

The heat exchange element piece 15 is one unit constituting the heat exchange element 6. The heat exchange element piece 15 is formed by adhering a plurality of ribs 14 on one surface of a substantially square heat transfer plate 13. The rib 14 on the heat transfer plate 13 is formed so that its longitudinal direction is directed from one end side of the heat transfer plate 13 to the other end side facing the rib 14. Each of the ribs 14 is arranged in parallel on the surface of the heat transfer plate 13 at predetermined intervals. Specifically, as shown in FIG. 3, the longitudinal direction of the rib 14 faces the end side 13a of the heat transfer plate 13 on one surface of the heat transfer plate 13 constituting the heat exchange element piece 15. It is formed by adhering so as to face the end side 13c. In addition, each rib 14 is arranged at a predetermined distance from the end side 13b of the heat transfer plate 13 perpendicular to the end side 13a toward the end side 13d facing the end side 13b.

The heat transfer plate 13 is a plate-shaped member for exchanging heat when the exhaust flow 3 and the supply air flow 4 flow across the heat transfer plate 13. The heat transfer plate 13 is formed of heat transfer paper based on cellulose fibers, and has heat transfer property, moisture permeability, and hygroscopic property. However, the material of the paper is not limited to this. As the heat transfer plate 13, for example, a moisture-permeable resin film based on polyurethane or polyethylene terephthalate, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber can be used. The heat transfer plate 13 is a thin sheet having heat transfer properties, and one having a property of not allowing gas to permeate can be used.

The plurality of ribs 14 are provided between a pair of opposite sides of the heat transfer plate 13, and are formed so as to go from one end side to the other end side. The rib 14 is a member that forms a gap for allowing the exhaust flow 3 or the air supply air 4 to pass between the heat transfer plates 13 when the heat transfer plates 13 are stacked, that is, the exhaust air passage 16 or the air supply air passage 17.

As shown in FIG. 4, each of the plurality of ribs 14 has a substantially flat shape having a flat surface (plane surface 14a). The rib 14 is composed of a plurality of fiber members 40 and a fiber melting layer 42 in which the fiber members 40 are melted and welded to each other on the surface of the rib 14. Specifically, the rib 14 has a main body portion formed by twisting a plurality of fiber members 40, and a fiber melting layer 42 formed on a flat surface 14a portion of the main body portion facing the heat transfer plate 13. The main body portion (plurality of fiber members 40) is exposed on the side surface 14b of the rib 14. The rib 14 is fixed to the heat transfer plate 13 via the adhesive member 41 on the flat surface 14a portion (fiber melting layer 42 portion) of the rib 14.

Each of the fiber members 40 has a substantially circular cross section and extends in the same direction as the rib 14. Then, the plurality of fiber members 40 form the rib 14 by twisting each other in a predetermined direction. As the material of the fiber member 40, it can be used as long as it has hygroscopicity and has a certain strength, and a resin member such as vinylon, polypropylene, polyethylene, polyethylene terephthalate, or polyamide can be used.

The fiber melt layer 42 is a melt layer in which a plurality of fiber members 40 are melted and welded (fixed) to each other, and is selectively formed on the flat surface 14a portion of the rib 14. Since the fiber members 40 are melted together, the rigidity of the fiber melt layer 42 is improved. As a result, the rigidity of the rib 14 is also improved.

Next, a method for manufacturing the rib 14 having the fiber melting layer 42 will be described with reference to FIG. FIG. 5 is a partial cross-sectional view showing a method of manufacturing the rib 14 having the fiber melting layer 42. Here, FIG. 5A is a diagram showing a first step of attaching the rib 14 made of a plurality of fiber members 40 to the heating press 70. FIG. 5B is a diagram showing a second step of heat-pressing a rib 14 composed of a plurality of fiber members 40 to obtain a rib 14 having a fiber melting layer 42. FIG. 5 (c) is a diagram showing a third step of removing the rib 14 having the fiber melting layer 42 from the heating press 70.

First, as a first step, as shown in FIG. 5A, from a plurality of fiber members 40 in which a substantially circular rib 14 (fiber melt layer 42 is not formed) is formed on the upper surface of the pedestal of the heating press machine 70. Ribs 14) are arranged at predetermined positions.

Next, as a second step, as shown in FIG. 5B, the press plate of the heating press 70 is pressed against the substantially circular rib 14 from above, and the pedestal and the press plate of the heating press 70 are pressed. Heat each. Specifically, by pressurizing the rib 14 with the heating press 70, the rib 14 has a crushed shape in the pressed direction, and the cross section of the rib 14 changes to a flat shape. At this time, by heating the pressurized surface, the fiber member 40 at the portion where the pedestal of the heating press 70 and the press plate are in contact (the portion where the flat surface 14a of the rib 14 is formed) is melted (welded) to melt the fibers. The layer 42 is selectively formed. Then, the heating of the pedestal and the press plate of the heating press 70 is stopped.

Here, as the pressurizing means, a known method can be used, and examples thereof include a flat plate press and a roll press. In this case, by adjusting the position of the press plate of the heating press machine 70 in the pressurizing direction (distance between the press plate and the pedestal), the width and height of the rib 14 having the fiber melting layer 42 (heat exchange element 6). The height of the air passage) can be easily adjusted. By making the press plate and the pedestal substantially parallel, the fiber melting layer 42 can be formed into a substantially parallel planar shape, and the heat transfer plates 13 can be easily kept parallel to each other, which is preferable.

Further, as the heating means, a known method can be used, and examples thereof include hot air or flame, non-contact heating by electromagnetic induction, or contact heating method by a heater. When pressurized, contact-type heating is particularly preferable. In the present embodiment, the fiber melt layer 42 is formed by heating while pressurizing, but the fiber melt layer 42 is formed by pressurizing the material once heated and melted before re-curing. You may. At this time, by performing cooling at the same time as pressurization, the shape at the time of pressurization can be more fixed.

Finally, as a third step, as shown in FIG. 5C, the press plate of the heating press 70 is removed upward, and the ribs 14 having the fiber melting layer 42 are taken out one by one from the pedestal.

As described above, the rib 14 in which the fiber melting layer 42 in which the plurality of fiber members 40 are melted and fixed to the surface (flat surface 14a portion) is selectively formed is manufactured.

Next, a method of manufacturing the heat exchange element 6 according to the first embodiment will be described with reference to FIG. FIG. 6 is a partial cross-sectional view showing a method of manufacturing the heat exchange element 6. Here, FIG. 6A is a diagram showing a fourth step of forming the heat exchange element piece 15. FIG. 6B is a diagram showing a fifth step of laminating the heat exchange element pieces 15 to form a laminated body. FIG. 6C is a diagram showing a sixth step of compressing the laminated body in the stacking direction to form the heat exchange element 6.

First, as a fourth step, as shown in FIG. 6A, a plurality of ribs 14 (ribs 14 having a fiber melting layer 42) are placed at predetermined positions on one surface of the heat transfer plate 13. The ribs 14 are arranged and fixed by an adhesive member 41 (not shown) coated on the fiber melting layer 42 (the flat surface 14a portion on the lower surface side shown in FIG. 4) on the lower surface side of the rib 14. As a result, the heat exchange element piece 15 having a plurality of ribs 14 (ribs 14 having the fiber melting layer 42) is formed on one surface of the heat transfer plate 13.

Next, as a fifth step, as shown in FIG. 6B, a plurality of heat exchange element pieces 15 are laminated in different directions so that the ribs 14 are alternately orthogonal to each other in the vertical direction one step at a time. Then, the laminated body 6a which is a precursor of the heat exchange element 6 is formed. At this time, the adhesive member 41 (not shown) is coated on the fiber melting layer 42 on the upper surface side of the rib 14 (the flat surface 14a portion on the upper surface side shown in FIG. 4).

Finally, as a sixth step, as shown in FIG. 6 (c), the laminated body 6a is compressed from the laminating direction (vertical direction) of the heat exchange element piece 15 so as to have a predetermined interval (rib 14) in the laminating direction. The heat exchange element 6 is formed by forming an air passage (exhaust air passage 16, air supply air passage 17) having an interval (interval corresponding to the height of the air). At this time, the rib 14 is fixed to the heat transfer plate 13 of another heat exchange element piece 15 by the adhesive member 41 coated on the rib 14.

As described above, the heat exchange element 6 having the rib 14 on which the fiber melting layer 42 is selectively formed is manufactured.

Here, the problems of the prior art will be described again with reference to FIGS. 3 and 4.

In a season when the outdoor humidity is low, such as winter, the humidity of the air supply 4 is lower than that of the exhaust stream 3, and when the water vapor in the air on the exhaust stream 3 passes through the exhaust air passage 16, it adheres to the rib 14. , The fiber member 40 absorbs water vapor, and the fiber member 40 expands in the longitudinal direction and the fiber radial direction. At this time, since the dimensional change occurs between the rib 14 and the heat transfer plate 13, the adhesive member 41 breaks and peels off. When the heat transfer plate 13 and the rib 14 are separated from each other, the pressure of the air supply air 4 is applied, the heat transfer plate 13 is bent, and the exhaust air passage 16 is blocked. When the exhaust air passage 16 is partially blocked, the air volume is partially reduced, and the exhaust flow 3 flows with an uneven air volume balance with respect to the heat transfer plate 13, so that the heat exchange efficiency of the heat exchange element 6 is high. Decreases.

On the other hand, the heat exchange element 6 according to the first embodiment uses ribs 14 having a fiber melting layer 42 formed on the surface as ribs 14 constituting the air passages (exhaust air passage 16, air supply air passage 17). It is configured. Therefore, it is possible to suppress the adhesive peeling caused by the dimensional change of the heat transfer plate 13 and the rib 14 due to the absorption of moisture in the air of the exhaust flow 3, and it is possible to suppress the blockage of the exhaust air passage 16. it can. Therefore, the heat exchange efficiency can be maintained high by eliminating the bias of the air flowing through the heat exchange element 6 and blowing air in the exhaust air passage 16 of the heat exchange element 6 at a uniform wind speed.

As described above, according to the heat exchange element 6 according to the first embodiment, the following effects can be enjoyed.

(1) The heat exchange element 6 is composed of a plurality of ribs 14 having a fiber melting layer 42 formed on the surface of which a plurality of fiber members 40 are melted and fixed. As a result, the rigidity of the surface of the rib 14 is improved, so that the rib 14 is less likely to be deformed even if an external force or a change in temperature and humidity acts on the heat exchange element 6. That is, the air passage of the heat exchange element 6 is less likely to be deformed than when the fiber melting layer 42 is not provided on the surface of the rib 14. As a result, the bias of the air flowing through the heat exchange element 6 is eliminated, and the air in the air passage of the heat exchange element 6 can be blown at a uniform wind speed, so that the heat exchange efficiency of the heat exchange element can be maintained high. .. In other words, the heat exchange element 6 can suppress a decrease in heat exchange efficiency due to a change in the shape of the air passage.

(2) The rib 14 is configured to have a fiber melting layer 42 having a flat shape (flat surface 14a) on an adhesive surface with the heat transfer plate 13. As a result, the adhesive area between the rib 14 and the heat transfer plate 13 is increased as compared with the case where the substantially circular rib 14 is used, so that the adhesive strength can be increased, and the rib 14 and the heat transfer plate 13 can be combined with each other. It is possible to suppress the blockage of the air passages (exhaust air passage 16, air supply air passage 17) due to the adhesive peeling between the two. That is, the heat exchange element 6 can be formed in which the rib 14 and the heat transfer plate 13 are less likely to be peeled off and the decrease in the ventilation volume can be suppressed.

(3) The rib 14 is formed by exposing a plurality of fiber members 40 on the side surface 14b of the rib 14. As a result, the moisture generated in the air passage easily reaches the internal fiber member 40 through the exposed fiber members 40, so that the deformation of the heat transfer plate 13 due to the moisture in the air passage can be suppressed. Can be done. That is, the heat exchange element 6 can be made capable of suppressing a decrease in heat exchange efficiency due to a change in the shape of the air passage of the heat exchange element 6.

(4) The rib 14 is formed by twisting a plurality of fiber members 40. That is, by twisting the fiber member 40, the tension as the rib 14 is increased, the dimensional change of the rib 14 due to moisture absorption is suppressed, and the blockage of the air passage due to the adhesive peeling of the rib 14 and the heat transfer plate 13 is suppressed. Can be done. That is, the heat exchange element 6 can be formed in which the rib 14 and the heat transfer plate 13 are less likely to be peeled off and the decrease in the ventilation volume can be suppressed.

(5) By configuring the heat exchange type ventilation device using the heat exchange element 6 according to the first embodiment, it is possible to suppress a decrease in heat exchange efficiency due to a change in the shape of the air passage of the heat exchange element 6. A possible heat exchange type ventilator can be realized.

The present invention has been described above based on the embodiments. It will be appreciated by those skilled in the art that these embodiments are exemplary and that various modifications are possible for each of these components and combinations of processing processes, and that such modifications are also within the scope of the present invention. By the way.

In the present embodiment, the fiber melting layer 42 is provided only on the flat surface 14a portion of the flat rib 14, but the present invention is not limited to this. For example, as shown in FIG. 7, the rib 14 may be configured to provide the fiber melting layer 42a on the entire surface of the substantially circular rib 14. This configuration will be described with reference to FIG.

FIG. 7 is a partial cross-sectional view showing a modified example of the structure of the rib 14 constituting the heat exchange element 6. In the heat exchange element 6 in the modified example, the rib 14 is configured to have a substantially circular main body portion (plurality of fiber members 40) and a fiber melt layer 42a covering the entire surface thereof. That is, the rib 14 has a structure in which the fiber member 40 twisted on the surface is not exposed. In this case, although moisture absorption into the rib 14 passing through the gap of the fiber member 40 is suppressed, the rigidity on the surface of the rib 14 is further improved, so that even if an external force or a temperature / humidity change acts on the heat exchange element 6. The rib 14 is less likely to be deformed. That is, the heat exchange element 6 can be made capable of suppressing a decrease in heat exchange efficiency due to a change in the shape of the air passage.

Further, in the main body of the rib 14, the gap formed by twisting the plurality of fiber members 40 may be impregnated with an adhesive member having a lower hygroscopicity than the fiber member 40. As a result, even if the fiber member 40 absorbs moisture and the fiber member 40 tries to change its size due to expansion, the adhesive member having low hygroscopicity is fixed, so that the change in the size of the rib 14 can be further suppressed. As an adhesive member having low hygroscopicity, for example, a solution-based adhesive (phenolic resin or the like) or a solvent-free adhesive (epoxy resin-based or the like) that is cured by a chemical reaction is used as a base, and a hydrophilic group (for example, hydroxy) is added to the monomer. An adhesive that does not contain a group or the like can be used.

With respect to the wording used above, the heat exchange element 6 of the present embodiment corresponds to the "heat exchange element" of the claim. Further, the heat transfer plate 13 corresponds to the "partition member" of the claim, the rib 14 corresponds to the "interval holding member" of the claim, and the heat exchange element piece 15 corresponds to the "unit component member" of the claim. Further, the fiber member 40 corresponds to the "fiber member" of the claim, the adhesive member 41 corresponds to the "adhesive member" of the claim, and the fiber melt layer 42 corresponds to the "fiber melt layer" of the claim. Further, the heat exchange type ventilator 2 is the "heat exchange type ventilator" of the claim, the exhaust flow 3 is the "exhaust flow" of the claim, the air supply 4 is the "supply air flow" of the claim, and the exhaust air passage 16 is claimed. The "exhaust air passage" and the air supply air passage of the item correspond to the "air supply air passage" of the claim.

As described above, the heat exchange element according to the present embodiment can suppress the air passage blockage caused by the dimensional change of the rib due to an external force or the like and maintain high heat exchange efficiency, and is a heat exchange type ventilation device. It is useful as a heat exchange element used for such purposes.

1 House 2 Heat exchange type ventilator 3 Exhaust flow 4 Air supply 5 Main body case 6 Heat exchange element 6a Laminated body 7 Exhaust fan 8 Inside air port 9 Exhaust port 10 Air supply fan 11 Outside air port 12 Air supply port 13 Heat transfer plate 14 Ribs 14a Flat surface 14b Side surface 15 Heat exchange element piece 16 Exhaust air passage 17 Air supply air passage 40 Fiber member 41 Adhesive member 42 Fiber fusion layer 42a Fiber fusion layer 101 Heat exchange element 102 Heat exchange element piece 103 Functional paper 104 Rib 105 Paper string 106 Hot Melt resin 107 Air flow path

Claims (5)

The exhaust air passage and the air supply air passage are alternately configured one layer at a time by laminating a unit constituent member including a partition member having heat transfer property and a plurality of interval holding members provided on one surface of the partition member. A heat exchange element in which the exhaust flow flowing through the exhaust air passage and the air supply air flowing through the air supply air passage exchange heat with each other via the partition member.
The partition member and the space-holding member are fixed to each other by an adhesive member, and are fixed to each other.
The spacing member is composed of a plurality of hygroscopic fiber members.
A heat exchange element characterized in that a plurality of the fiber members on the surface of the interval holding member form a fiber melt layer that is melted and fixed. The heat exchange element according to claim 1, wherein the interval holding member has the fiber melt layer having a planar shape on an adhesive surface with a partition member. The heat exchange element according to claim 1 or 2, wherein a plurality of the fiber members are exposed on the side surface of the interval holding member. The heat exchange element according to any one of claims 1 to 3, wherein the interval holding member is formed by twisting a plurality of the fiber members. A heat exchange type ventilator equipped with the heat exchange element according to any one of claims 1 to 4.