JP2020051655A - Heat exchange element and heat exchange type ventilation device using the same - Google Patents

Abstract

To provide a heat exchange element suppressing peeling between a space-holding member and a partition member on its peripheral part and suppressing reduction in a ventilation volume, and to provide a heat exchange type ventilation device using the heat exchange element.SOLUTION: A heat exchange element 6 is such that heat exchange element pieces 15 each including a heat transfer plate 13 and a plurality of ribs 14 (inner ribs 14a, outer ribs 14b) provided on one surface of the heat transfer plate 13 are laminated, an exhaust duct 16 and an air supply duct 17 are alternately configured one by one, and an exhaust air flow 3 circulating in the exhaust air duct 16 and an air supply flow 4 circulating in the air supply duct 17 are heat-exchanged via the heat transfer plate 13. The rib 14 is fixed to the heat transfer plate 13 via a bonding member provided between the rib 14 and the heat transfer plate 13. The outer rib 14b located around the outermost periphery of the rib 14 is provided with a sealing material 50 coating the outer peripheral side surface side of the heat exchange element 6.SELECTED DRAWING: Figure 3

Description

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

  As a heat exchange element used in this type of heat exchange type ventilator, for example, the following structure is known in order to realize cost reduction and weight reduction.

  As shown in FIG. 7, the heat exchange element 101 is configured by stacking a large number of heat exchange elements 102 composed of functional paper 103 having heat conductivity and ribs 104. On one surface of the functional paper 103, a plurality of paper cords 105 and a plurality of ribs 104 made of a hot melt resin 106 for bonding the paper cords 105 to the functional paper 103 are provided in parallel at predetermined intervals. The rib 104 forms a gap between a pair of functional papers stacked adjacent to each other, and forms an air flow path 107. The heat exchange element 101 is formed such that a plurality of gaps are stacked, and the air blowing directions of the respective air flow paths 107 in adjacent gaps are configured to be orthogonal to each other. Thus, the supply air flow and the exhaust air flow alternately through the air flow path 107 for each functional paper 103, and heat exchange is performed between the air supply flow and the exhaust air flow.

JP-A-11-248390

  Such a conventional heat exchange element has a configuration in which a plurality of substantially circular paper cords are bonded with a hot melt resin so as to be tangent to the functional paper (a state in which a circle and a surface are in contact). In such a configuration, only the tangential portion between the substantially circular paper cord and the functional paper is bonded, and the bonding area is small and the bonding strength is weak. When an external force such as pushing is generated, the paper cord and the functional paper are separated, and the air that has passed through the heat exchange element leaks to the outside of the heat exchange element, resulting in insufficient ventilation. Was.

  In view of the above, the present invention has been made to solve the above-mentioned conventional problem. When an external force is generated on the outer peripheral surface of the heat exchange element, the gap between the spacing member (paper string) and the partition member (functional paper) is formed at the outer peripheral portion. It is an object of the present invention to provide a heat exchange element capable of suppressing separation between layers and suppressing a decrease in ventilation, and a heat exchange type ventilation device using the same.

  In order to achieve this object, the heat exchange element according to the present invention is configured by stacking a unit member including a partition member having heat conductivity and a plurality of spacing members provided on one surface of the partition member. A heat exchange element in which the exhaust air path and the supply air path are alternately configured one layer at a time, and the exhaust flow flowing through the exhaust air path and the supply air flow flowing through the supply air path exchange heat via a partition member. The space holding member is fixed to the partition member by an adhesive member provided between the space holding member and the partition member, and the space holding member located at the outermost periphery of the space holding member has an outer circumferential side surface of the heat exchange element. And a sealing member for covering the target is provided, thereby achieving the intended purpose.

  Advantageous Effects of Invention According to the present invention, it is possible to obtain a heat exchange element and a heat exchange type ventilation device using the same, which are less likely to be separated between the spacing member and the partition member in the outer peripheral portion and can suppress a decrease in the amount of ventilation.

FIG. 1 is a schematic diagram illustrating an installation state of a heat exchange ventilator according to a first embodiment of the present invention in a house. FIG. 2 is a schematic diagram showing a structure of the heat exchange type ventilation device. FIG. 3 is an exploded perspective view showing the structure of the heat exchange element. FIG. 4 is a partially enlarged view showing the structure of the rib. FIG. 5 is a partially enlarged view showing the structure of the heat exchange element piece. FIG. 6 is a partially enlarged view showing the structure of the heat exchange element piece according to the second embodiment of the present invention. FIG. 7 is an exploded perspective view showing the structure of a conventional heat exchange element.

  The heat exchange element according to the present invention is configured such that a unit member including a partition member having heat conductivity and a plurality of spacing members provided on one surface of the partition member is laminated to form an exhaust air path and an air supply air path by one. The heat exchange element is configured such that the layers are alternately arranged, and the exhaust flow flowing through the exhaust air path and the supply air flow flowing through the supply air path exchange heat via a partition member, and the spacing member is a spacing member. The partitioning member is fixed to the partitioning member by an adhesive member provided between the partitioning member, and the sealing member covering the outer peripheral side surface is provided on the outermost circumferential holding member of the spacing member. I have.

  Thereby, the sealing member joins the spacing member and the partition member, and the adhesive strength between the spacing member and the partition member can be increased. Therefore, it is possible to obtain a heat exchange element that is less likely to be peeled between the spacing member and the partition member, and that can suppress a decrease in ventilation.

  Further, the sealing member may be provided so as to protrude outward from an end side of the partition member.

  Thereby, in the process in which the external force generated on the outer surface of the heat exchange element is transmitted to each of the spacing member and the partition member, the external force is dispersed by the deformation of the sealing member, and is transmitted to the spacing member and the partition member. External force can be reduced. Therefore, the separation that occurs between the spacing member and the partition member can be made more difficult to occur.

  Further, a configuration may be adopted in which a sealing member having lower hygroscopicity than the spacing member is provided.

  Thereby, it is suppressed that the moisture (water vapor) in the air outside the heat exchange element reaches the space holding member inside the sealing member. For this reason, it is possible to prevent the gap holding member from absorbing moisture to expand and break the adhesive member fixing the gap holding member and the partition member. Therefore, the separation that occurs between the spacing member and the partition member can be made more difficult to occur.

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

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

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

  As shown in FIG. 1, the exhaust stream 3 is discharged outside through the heat exchange ventilator 2 as indicated by black arrows. The exhaust flow 3 is a flow of air discharged from indoors to outdoors. Further, the supply air flow 4 is taken into the room through the heat exchange type ventilation device 2 as indicated by a white arrow. The air supply flow 4 is a flow of air taken in from indoors to outdoors. For example, in winter in Japan, the exhaust stream 3 may be at 20 to 25 ° C., while the supply stream 4 may be below freezing. The heat exchange type ventilator 2 performs ventilation and transmits the heat of the exhaust stream 3 to the air supply stream 4 during the ventilation to suppress unnecessary heat release.

  As shown in FIG. 2, the heat exchange ventilator 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 ventilation device 2. On the outer periphery of the main body case 5, an inside air port 8, an exhaust port 9, an outside air port 11, and an air supply port 12 are formed. The inside air port 8 is a suction port that sucks the exhaust gas flow 3 into the heat exchange ventilator 2. The exhaust port 9 is an outlet that discharges the exhaust stream 3 from the heat exchange ventilator 2 to the outside. The outside air port 11 is a suction port that sucks the supply air flow 4 into the heat exchange ventilator 2. The air supply port 12 is a discharge port that discharges the air supply flow 4 from the heat exchange ventilator 2 to the room.

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

  Next, the heat exchange element 6 will be described with reference to FIGS. FIG. 3 is an exploded perspective view showing the structure of the heat exchange element 6. FIG. 4 is a partial sectional view showing the structure of the rib 14. FIG. 5 is a partially enlarged view of the heat exchange element piece 15.

  As shown in FIG. 3, the heat exchange element 6 includes a plurality of heat exchange members in which a plurality of ribs 14 (an inner rib 14 a and an outer rib 14 b described later) are bonded on one surface of a substantially square heat transfer plate 13. It is composed of an element piece 15. 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 alternately arranged one by one, so that the exhaust flow path 16 through which the exhaust flow 3 flows and the supply air flow 4 Is formed, and the exhaust air flow 3 and the air supply flow 4 alternately flow at right angles to each other, thereby 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 bonding a plurality of ribs 14 on one surface of a substantially square heat transfer plate 13. The ribs 14 on the heat transfer plate 13 are formed such that the longitudinal direction thereof extends from one end of the heat transfer plate 13 to the end opposite thereto. Each of the plurality of ribs 14 is formed in a straight line. The ribs 14 are arranged in parallel at a predetermined interval. Specifically, as shown in FIG. 3, on one surface of the heat transfer plate 13 constituting the heat exchange element piece 15, the longitudinal direction of the rib 14 is opposed to the end 13 a of the heat transfer plate 13. Is formed so as to be directed toward the end side 13c. In addition, the respective ribs 14 are arranged at predetermined intervals from an end side 13b of the heat transfer plate 13 perpendicular to the end side 13a toward an end side 13d opposed thereto. Further, the heat exchange element piece 15 is sealed on the outer peripheral side of the heat exchange element 6 (heat exchange element piece 15) with respect to the outermost rib 14 (outer rib 14b described later) among the plurality of ribs 14. A stopper 50 is formed. The rib 14 and the sealing material 50 will be described later.

  The heat transfer plate 13 is a plate-shaped member for performing heat exchange 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 conductivity, moisture permeability, and moisture absorption. 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 conductivity, and may be a sheet having a property of not allowing gas to permeate.

  A plurality of ribs 14 are provided between a pair of opposed sides of the heat transfer plate 13 and are formed so as to extend from one side to the other side. The rib 14 is a substantially cylindrical member that forms a gap for allowing the exhaust flow 3 or the supply air flow 4 to flow between the heat transfer plates 13 when the heat transfer plates 13 are stacked, that is, the exhaust air passage 16 or the supply air passage 17. It is. As the cross-sectional shape of the rib 14, a member having a shape such as a rectangular shape or a hexagonal shape other than the substantially circular shape may be used.

  Each of the plurality of ribs 14 has a substantially circular cross section, as shown in FIG. The ribs 14 are composed of a plurality of fiber members 40, and are tangentially fixed to the heat transfer plate 13 via an adhesive member 41. Further, the rib 14 has an adhesive member 41 on the surface layer, and the adhesive member 41 is impregnated into each minute gap of the fiber member 40.

  Each of the fiber members 40 is a fiber member having a substantially circular cross section and extending in the same direction as the ribs 14, as shown in FIG. As a material of the fiber member 40, a material having hygroscopicity and a certain strength can be used, and a resin member such as polypropylene, polyethylene, polyethylene terephthalate, polyamide, or a cellulose fiber, ceramic fiber, or glass fiber is used. Paper material, cotton, silk, and hemp can be used.

  Note that the ribs 14 are fixed to the heat transfer plate 13 by impregnating a plurality of fiber members 40 constituting the ribs 14 with an adhesive member 41 and then disposing the ribs 14 on one surface of the heat transfer plate 13. Then, it may be performed by heat welding of the surface bonding member 41. Alternatively, the ribs 14 are arranged on one surface of the heat transfer plate 13 and the adhesive member 41 is applied, and the impregnation of the plurality of fiber members 40 constituting the ribs 14 and the heat welding with the heat transfer plate 13 are performed. It may be performed simultaneously.

  As shown in FIG. 3, the plurality of ribs 14 have outer ribs 14b arranged along the outer edge of the heat transfer plate 13, and a plurality of inner ribs 14a located between the outer ribs 14b at both ends. The outer rib 14b is a rib formed along the edge 13b or 13d at the outer edge of the heat transfer plate 13, which is the outermost position of the rib 14, among the plurality of ribs 14. The inner rib 14a is a rib formed in a region between the outer ribs 14b at both ends of the plurality of ribs 14. The outer rib 14b is provided with a sealing material 50 that covers the outer peripheral side surface of the heat exchange element 6. As shown in FIG. 5, the sealing material 50 is formed on the outer peripheral side of the heat exchange element 6 with respect to the outer rib 14b sandwiched between the upper and lower heat transfer plates 13. Specifically, the sealing material 50 is selectively formed so as to cover the outer peripheral side surface of the heat exchange element 6 with respect to the outer rib 14b which is sandwiched between the vertically adjacent heat transfer plates 13 and tangent. ing. The sealing material 50 is formed in a state (concave shape) that is recessed toward the inside of the heat exchange element piece 15 (heat exchange element 6) from the edge of the heat transfer plate 13. After the necessary number of heat exchange element pieces 15 are laminated to form the heat exchange element 6, the sealing material 50 is applied to the outer rib 14 b sandwiched between the upper and lower heat transfer plates 13. 6 is formed by coating and curing on the outer peripheral side surface.

  The sealing material 50 is preferably a chemical agent that exerts an adhesive force on the outer ribs 14b. For example, when a paper string is used for the outer ribs 14b, a vinyl acetate resin-based adhesive having good adhesion to hydrophilic paper Is mentioned. Further, as the sealing material 50, a material having lower hygroscopicity than the rib 14 (outer rib 14b) can be selected. Further, a curing method such as moisture curing, pressure curing, and UV curing can be selected according to the manufacturing method. However, known adhesives and bonding methods can be used according to the material of the outer rib 14b, not limited to these chemicals, and there is no difference in the effects.

  According to the heat exchange element 6 according to the first embodiment, the sealing material 50 joins the outer rib 14b and the heat transfer plate 13 and can increase the adhesive strength between the outer rib 14b and the heat transfer plate 13. . Therefore, when an external force such as pushing by hand is accidentally generated on the surface of the heat exchange element 6 at the time of maintenance or the like, separation between the outer rib 14b and the heat transfer plate 13 is less likely to occur. Leakage of the ventilated air to the outside of the heat exchange element 6 can be suppressed. As a result, it is possible to obtain the heat exchange element 6 that can suppress the decrease in the ventilation rate as compared with the heat exchange element in which the sealing material 50 is not provided.

  When the sealing material 50 having a lower hygroscopic property than the outer rib 14b is applied, moisture (water vapor) in the air outside the heat exchange element 6 is reduced by the sealing material 50 inside the sealing material 50. To reach the outer rib 14b. For this reason, the outer rib 14b absorbs moisture and expands, and the separation between the outer rib 14b and the heat transfer plate 13 can be further reduced.

(Embodiment 2)
Next, a heat exchange element 6 according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 6 is a partially enlarged view showing the structure of the heat exchange element piece according to the second embodiment of the present invention.

  The sealing material 50 of the heat exchange element 6 according to the first embodiment has a configuration that is recessed toward the inside of the heat exchange element piece 15 (heat exchange element 6) from the end of the heat transfer plate 13. On the other hand, the sealing material 50 of the heat exchange element 6 according to the second embodiment moves from the edge (outer edge) of the heat transfer plate 13 toward the outside of the heat exchange element piece 15 (heat exchange element 6). It is configured to protrude. The other configuration of the heat exchange element 6 is the same as that of the first embodiment, and the description thereof will not be repeated.

  As shown in FIG. 6, the heat exchange element piece 15 according to the second embodiment is sealed so as to protrude from the edge of the heat transfer plate 13 toward the outside of the heat exchange element piece 15 (heat exchange element 6). Material 50 is provided. Here, the direction in which the sealing material 50 protrudes outward is the direction away from the outer ribs 14b along the surface of the heat transfer plate 13 to which the outer ribs 14b are fixed. As in the first embodiment, the sealing material 50 is formed by laminating a required number of heat exchange element pieces 15 to form the heat exchange element 6, and then with respect to the outer rib 14b sandwiched between the upper and lower heat transfer plates 13. The heat exchange element 6 is formed by coating and hardening on the outer peripheral side surface of the heat exchange element 6. 15 so as to protrude outward.

  According to the heat exchange element 6 according to the second embodiment, the sealing material 50 joins the outer rib 14b and the heat transfer plate 13, and can increase the adhesive strength between the outer rib 14b and the heat transfer plate 13. The same effect as in the first embodiment can be enjoyed. In addition, the sealing material 50 protruding from the edge of the heat transfer plate 13 allows the hand of a person who carries the heat to contact the outer surface of the heat exchange element 6 and generate an external force. In the process in which the external force is transmitted to each of the heat transfer plates 13, the external force is dispersed by the deformation of the sealing material 50, and the effect of reducing the external force transmitted to the outer rib 14 b and the heat transfer plate 13 can also be enjoyed. Therefore, when an external force is generated on the outer surface of the heat exchange element 6, peeling is less likely to occur between the outer rib 14b and the heat transfer plate 13, and a heat exchange element capable of suppressing a decrease in ventilation can be obtained.

  As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. Can easily be inferred.

  Here, the heat exchange type ventilator 2 of the present embodiment is a "heat exchange type ventilator" in the claims, the exhaust flow 3 is an "exhaust flow" in the claims, the supply air flow 4 is a "supply air flow" in the claims, The heat exchange element 6 corresponds to a “heat exchange element” in the claims. The heat transfer plate 13 is a "partition member" in the claims, the rib 14 is a "spacing member" in the claims, the outer rib 14b is a "spacing member located at the outermost periphery" in the claims, and the heat exchange element piece 15 Corresponds to a “unit constituent member” in the claims. Furthermore, the exhaust air path 16 is an “exhaust air path” in claims, the supply air path 17 is a “supply air path” in claims, the sealing material 50 is a “sealing member” in claims, and the fiber member 40 is a claim. Corresponds to the “fiber member”.

  As described above, the heat exchange element according to the present embodiment is less likely to be separated between the spacing member and the partition member, and can suppress a decrease in the amount of ventilation. It is useful as a heat exchange element to be used.

DESCRIPTION OF SYMBOLS 1 House 2 Heat exchange type ventilator 3 Exhaust flow 4 Supply air flow 5 Main body case 6 Heat exchange element 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 plates 13a, 13b, 13c , 13d End side 14 Rib 14a Inner rib 14b Outer rib 15 Heat exchange element piece 16 Exhaust air path 17 Supply air path 40 Fiber member 41 Adhesive member 50 Sealant 101 Heat exchange element 102 Heat exchange element unit 103 Functional paper 104 Rib 105 Paper string 106 Hot melt resin 107 Air flow path

Claims (4)

A partition member having heat conductivity, and a unit component member including a plurality of spacing members provided on one surface of the partition member are stacked to alternately configure an exhaust air path and an air supply air path one layer at a time. An exhaust flow that flows through an exhaust air path and a supply air flow that flows through the supply air path are heat exchange elements that exchange heat via the partition member,
The gap holding member is fixed to the partition member by an adhesive member provided between the gap holding member and the partition member, and the heat exchange between the gap holding member located at the outermost periphery of the gap holding member is performed. A heat exchange element, wherein a sealing member for covering an outer peripheral side surface of the element is provided.   The heat exchange element according to claim 1, wherein the sealing member is provided so as to protrude outward from an end of the partition member.   3. The heat exchange element according to claim 1, wherein the sealing member has lower hygroscopicity than the spacing member. 4.   A heat exchange type ventilator, comprising the heat exchange element according to any one of claims 1 to 3.