JP2021050833A - Heat exchange element and heat exchange ventilation device using the same - Google Patents

Abstract

To provide: a heat exchange element capable of inhibiting blockage of air flowpaths due to an adhesive peeling off between a heat-transfer plate and ribs forming a heat exchange element piece caused by dimensional change of the heat-transfer plate due to moisture absorption; and a heat exchange ventilation device using the same.SOLUTION: A heat exchange element piece 15 comprises: a heat-transfer plate 13 which has heat transferring properties and has a fiber direction 30 oriented in a fixed direction; and multiple ribs 14 extending along the fiber direction 30 on one surface of the heat-transfer plate 13. A heat exchange element 6 comprises such heat exchange element pieces stacked in the vertical direction to form air-exhausting flowpaths 16 and air-supplying flowpaths 17 alternately one by one.SELECTED DRAWING: Figure 3

Description

The present invention uses a heat exchange element used in a cold region or the like to exchange heat between an exhaust flow that exhausts indoor air to the outside and a supply airflow that supplies outdoor air to the room, and a heat exchange element thereof. It relates to a heat exchange type ventilator.

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

FIG. 7 is an exploded perspective view showing the structure of a conventional heat exchange element.

As shown in FIG. 7, the conventional heat exchange element 101 is configured by laminating a large number of heat exchange element single units 102 composed of functional paper 103 having heat transfer properties and ribs 104. On one surface of the functional paper 103, a plurality of ribs 104 composed 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 103 that are vertically adjacent to each other and 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, a substantially circular fiber member (for example, the above-mentioned paper string 105) is adhered on one surface of a partition member (for example, the above-mentioned functional paper 103) to an adhesive member (for example, the above-mentioned above-mentioned paper string 105). A large number of unit constituent members (for example, heat exchange element single unit 102) formed with an interval holding member (for example, the rib 104 described above) wrapped with hot melt resin 106) are alternately laminated so as to be orthogonal to each other, and then in the lamination direction. Manufactured by compressing to. However, in the unit constituent member, the partition member and the fiber member absorb moisture in the air and change in size, so that the adhesive portion between the partition member and the interval holding member may be partially peeled off. .. For this reason, if the unit constituent members to be laminated include a partially peeled unit constituent member, the air passage is partially crushed when the unit constituent members are laminated, and the air flowing through the heat exchange element is biased. This causes a problem that the heat exchange efficiency is lowered.

Therefore, the present invention can suppress the blockage of the air passage due to the peeling of the adhesive between the partition member constituting the unit constituent member and the interval holding member caused by the dimensional change of the partition member due to moisture absorption. It is an object of the present invention to provide an exchange element and a heat exchange type ventilation device using the exchange element.

Then, in order to achieve this object, the heat exchange element according to the present invention has heat transfer properties and has a partition member whose fiber direction is directed in a certain direction and one surface of the partition member in the fiber direction. It is characterized in that the unit constituent members including the interval holding members extending along the line are laminated in the vertical direction to form the exhaust air passage and the air supply air passage alternately one layer at a time. This achieves the initial purpose.

According to the present invention, it is possible to suppress blockage of the air passage due to adhesive peeling between the partition member constituting the unit constituent member and the interval holding member caused by the dimensional change of the partition member due to moisture absorption. An exchange element and a heat exchange type ventilation device using the exchange element can be provided.

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 used in the heat exchange type ventilator. FIG. 4 is a perspective view of a heat exchange element piece constituting the heat exchange element. FIG. 5 is a diagram showing a state in which the heat transfer plate constituting the heat exchange element piece absorbs moisture and stretches. FIG. 6 is a diagram for explaining a method of manufacturing the same heat exchange element. 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 includes a partition member having heat conductivity and a fiber direction directed in a certain direction, and a spacing member extending along the fiber direction on one surface of the partition member. It is characterized in that the exhaust air passage and the air supply air passage are alternately configured one layer at a time by stacking the unit constituent members provided with the above in the vertical direction.

According to such a configuration, by providing the interval holding member extending along the fiber direction on one surface of the partition member constituting the unit constituent member, the interval holding member affected by the dimensional change of the partition member due to moisture absorption. The effect on the partition member and the space holding member is reduced, and the adhesive peeling between the partition member and the spacing member is suppressed. Therefore, when the unit constituent members are laminated in the vertical direction to alternately form the exhaust air passage and the air supply air passage layer by layer, it is possible to prevent the air passages in the heat exchange element from being partially blocked. it can.

Further, in the heat exchange element according to the present invention, it is preferable that the interval holding member is formed by twisting a plurality of fiber members. According to such a configuration, since the tension of the space-holding member is increased by twisting the fiber member, the dimensional change of the space-holding member due to moisture absorption is suppressed, and the adhesive peeling between the partition member and the space-holding member is caused. Blockage of the air passage can be suppressed.

Further, in the heat exchange element according to the present invention, it is preferable that the interval holding member and the partition member are fixed by an adhesive member. According to such a configuration, the adhesive force between the partition member and the interval holding member is increased, and it is possible to suppress the blockage of the air passage due to the adhesive peeling between the partition member and the interval holding member.

Further, in the heat exchange element according to the present invention, it is preferable that the interval holding member has higher hygroscopicity than the partition member. According to such a configuration, since the spacing member absorbs moisture, the dimensional change of the partition member is suppressed, so that it is possible to suppress the blockage of the air passage due to the adhesive peeling between the partition member and the spacing member. ..

Further, the heat exchange type ventilation device according to the present invention is configured by mounting the above-mentioned heat exchange element. For this reason, a heat exchange element capable of suppressing blockage of the air passage due to adhesive peeling between the partition member constituting the unit constituent member and the interval holding member caused by a dimensional change of the partition member due to moisture absorption is provided. A heat exchange type ventilator provided can be provided.

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 provided with a heat exchange element 6 according to the first embodiment of the present invention. 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 ventilator 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 flow 3 is 20 ° C to 25 ° C, while the airflow 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 from the inside air port 8 by driving 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 from the outside air port 11 by driving 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 used in the heat exchange type ventilator 2. FIG. 4 is a perspective view of the heat exchange element piece 15 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. A plurality of ribs 14 are adhered to each heat exchange element piece 15 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 which the ribs 14 are alternately oriented one step at a time so as to be orthogonal to each other. With such a configuration, the exhaust air passage 16 through which the exhaust flow 3 ventilates and the air supply air passage 17 through which the air supply airflow 4 ventilates are formed, so that the exhaust flow 3 and the air supply airflow 4 flow alternately at right angles to each other. It enables heat exchange between them.

The heat exchange element piece 15 is one unit constituting the heat exchange element 6. As described above, 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 end side facing the rib 14. Each of the ribs 14 is formed in a straight line. 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, of the two heat exchange element pieces 15 adjacent to each other on the upper and lower sides, ribs are formed on one surface of the heat transfer plate 13 constituting one of the heat exchange element pieces 15. The longitudinal direction of 14 is formed by adhering so as to be directed from the end side 13a of the heat transfer plate 13 toward the opposite end side 13c. Further, on one surface of the heat transfer plate 13 constituting the other heat exchange element piece 15, the longitudinal direction of the rib 14 is the end side 13b (the end side perpendicular to the end side 13a) of the heat transfer plate 13. ) To the opposite end side 13d.

The heat transfer plate 13 is a thin sheet having a heat transfer property for exchanging heat when the exhaust flow 3 and the supply air flow 4 flow across the heat transfer plate 13, and has a property of not allowing gas to permeate. Can be used. The heat transfer plate 13 is formed of heat transfer paper based on cellulose fibers, has heat transfer property, moisture permeability, and hygroscopic property, and can obtain a heat exchange element 6 for exchanging heat and moisture. However, the material of the heat transfer plate 13 is not limited to this.

Here, since the heat transfer plate 13 is manufactured while flowing the pulp in a certain direction, the cellulose fibers constituting the heat transfer plate 13 are aligned in the direction in which the pulp flows. The direction in which the cellulose fibers are aligned is referred to as the fiber direction 30.

Then, when the heat transfer plate 13 absorbs moisture, it expands in a direction orthogonal to the fiber direction 30 on the plane of the heat transfer plate 13 constituting the heat exchange element piece 15. That is, the heat transfer plate 13 expands in a direction orthogonal to the ribs 14 constituting the same heat exchange element piece 15. Details will be described later.

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 side to the other. The rib 14 is a member for forming a gap for allowing the exhaust flow 3 or the air flow 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 circular cross section. The rib 14 is composed of a plurality of fiber members 40, and is fixed on the heat transfer plate 13 by the adhesive member 41. The rib 14 has an adhesive member 41 on the surface layer, and is configured by impregnating each minute gap of the fiber member 40 with the adhesive member 41.

Each of the fiber members 40 has a substantially circular cross section and is a fiber member extending in the same direction as the rib 14. As the material of the fiber member 40, it is sufficient that it has a higher moisture absorption property than the heat transfer plate 13 and has a certain strength, for example, a resin member such as polypropylene, polyethylene, polyethylene terephthalate, or polyamide, or cellulose fiber or ceramic. Paper materials based on fibers and glass fibers, cotton, silk and linen can be used.

Next, with reference to FIG. 5, the adhesive peeling that occurs between the heat transfer plate 13 and the rib 14 due to the heat transfer plate 13 constituting the heat exchange element piece 15 absorbing moisture will be described. FIG. 5 is a diagram showing a state in which the heat transfer plate 13 constituting the heat exchange element piece 15 absorbs moisture and stretches. Here, FIG. 5A shows a heat exchange element piece 15 according to a comparative example in which ribs 14 are arranged on one surface of the heat transfer plate 13 in a direction orthogonal to the fiber direction 30 of the heat transfer plate 13. It is a plan view, and FIG. 5 (b) is a cross-sectional view of the heat exchange element piece 15 according to the comparative example along the line XX in FIG. 5 (a). Further, FIG. 5C shows a plane of the heat exchange element piece 15 according to the present embodiment in which ribs 14 are arranged along the fiber direction 30 of the heat transfer plate 13 on one surface of the heat transfer plate 13. FIG. 5 (d) is a cross-sectional view of the heat exchange element piece 15 according to the present embodiment along the YY line in FIG. 5 (c).

In the heat exchange element piece 15 according to the comparative example, as shown in FIG. 5A, the rib 14 is on one surface of the heat transfer plate 13 in a direction orthogonal to the fiber direction 30 of the heat transfer plate 13. Have been placed. As described above, when the heat transfer plate 13 absorbs moisture, it expands in the direction orthogonal to the fiber direction 30 on the plane of the heat transfer plate 13. That is, the heat transfer plate 13 extends in the direction along the rib 14 (the direction in which the rib 14 is extended) by absorbing moisture. Therefore, in the heat exchange element piece 15 according to the comparative example, as shown in FIG. 5B, the heat transfer plate 13 at the portion bonded to the rib 14 is in the direction along the rib 14. Since it stretches toward the rib 14, the dimensional change of the heat transfer plate 13 due to moisture absorption has a large effect on the rib 14, and adhesive peeling occurs between the heat transfer plate 13 and the rib 14.

On the other hand, in the heat exchange element piece 15 according to the present embodiment, as shown in FIG. 5 (c), the rib 14 is placed on one surface of the heat transfer plate 13 in the fiber direction 30 of the heat transfer plate 13. It is arranged in the direction along the line. That is, the heat transfer plate 13 extends in the direction orthogonal to the rib 14 by absorbing moisture. Therefore, in the heat exchange element piece 15 according to the present embodiment, as shown in FIG. 5D, the heat transfer plate 13 extends in the direction orthogonal to the rib 14, but is in contact with the rib 14. Since the adhesive portion is divided, the influence of the dimensional change of the heat transfer plate 13 due to moisture absorption on the rib 14 is reduced, and the adhesion peeling between the heat transfer plate 13 and the rib 14 is suppressed.

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 diagram for explaining a method of manufacturing the heat exchange element 6. Here, (a) to (c) in the figure show each manufacturing process of the heat exchange element 6. That is, FIG. 6A shows the first step of forming the heat exchange element piece 15. FIG. 6B shows a second step of laminating the heat exchange element pieces 15 to form the laminated body 6a. FIG. 6C shows a third step of crimping the laminated body 6a in the laminating direction to form the heat exchange element 6. Hereinafter, the contents of each step will be specifically described.

First, as a first step, a heat transfer plate 13 in which the fiber direction 30 is directed in a certain direction is prepared. Then, as shown in FIG. 6A, a plurality of ribs 14 are arranged at predetermined positions on one surface of the heat transfer plate 13, and the ribs 14 and the heat transfer plate 13 are adhered to each other. The member 41 (not shown) is fixed by heat welding. At this time, the ribs 14 are arranged and fixed along the fiber direction 30 of the heat transfer plate 13 (see FIG. 4). In this way, a plurality of heat exchange element pieces 15 having ribs 14 extending along the fiber direction 30 of the heat transfer plate 13 are formed.

Next, as a second step, as shown in FIG. 6B, the heat exchange element piece 15 is inserted into the box-shaped laminating jig 50 having an opening at the top. At this time, the heat exchange element piece 15 is arranged at a predetermined position so as to press one of the end sides of the heat exchange element piece 15 against one of the wall surfaces of the laminating jig 50. Then, the heat exchange element pieces 15 to be inserted 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 to form a laminated body 6a which is a precursor of the heat exchange element 6. .. Since the same adhesive member (not shown) as the adhesive member 41 of the rib 14 is separately coated on the upper surface side of the rib 14, it is newly laminated with the rib 14 of the heat exchange element piece 15 in the front layer. The heat transfer plate 13 of the heat exchange element piece 15 is temporarily bonded by an adhesive member. Then, these steps are repeated layer by layer in alternating directions to form a laminated body 6a in which all the heat exchange element pieces 15 are laminated.

Finally, as a third step, as shown in FIG. 6C, the laminated body 6a is compressed by the press machine 51 from the laminating direction (vertical direction) of the heat exchange element piece 15, so that the laminated body 6a is predetermined in the laminating direction. An air passage (exhaust air passage 16, air supply air passage 17) having an interval (interval corresponding to the height of the rib 14) is formed to form the heat exchange element 6. At this time, the rib 14 is also fixed to the heat transfer plate 13 of another heat exchange element piece 15 by the adhesive member of the rib 14.

As described above, the heat exchange element 6 composed of the heat exchange element piece 15 having the ribs 14 arranged along the fiber direction 30 of the heat transfer plate 13 is manufactured.

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

(1) By providing a plurality of ribs 14 extending along the fiber direction 30 of the heat transfer plate 13 on one surface of the heat transfer plate 13 constituting the heat exchange element piece 15, heat transfer by moisture absorption is provided. The influence of the dimensional change of the plate 13 on the rib 14 is reduced, and the adhesive peeling between the heat transfer plate 13 and the rib 14 is suppressed. Therefore, when a plurality of heat exchange element pieces 15 are laminated in the vertical direction to alternately form the exhaust air passage 16 and the air supply air passage 17 layer by layer, each air passage in the heat exchange element 6 is partially formed. It is possible to prevent the blockage.

(2) The rib 14 is formed by twisting a plurality of fiber members 40. As a result, the tension of the rib 14 is increased, so that the dimensional change of the rib 14 due to moisture absorption is suppressed, and the blockage of each air passage due to the adhesive peeling between the heat transfer plate 13 and the rib 14 can be suppressed.

(3) The rib 14 and the heat transfer plate 13 are fixed to each other by an adhesive member 41. As a result, the adhesive force between the rib 14 and the heat transfer plate 13 is increased, and the adhesive peeling with the rib 14 due to the dimensional change of the heat transfer plate 13 due to moisture absorption is suppressed. Therefore, it is possible to suppress blockage of each air passage due to adhesive peeling between the heat transfer plate 13 and the rib 14.

(4) The rib 14 is configured to have higher hygroscopicity than the heat transfer plate 13. As a result, the rib 14 absorbs moisture, so that the dimensional change of the heat transfer plate 13 is suppressed, so that the blockage of each air passage due to the adhesive peeling between the heat transfer plate 13 and the rib 14 can be suppressed. ..

(5) The heat exchange type ventilator 2 is configured to include the above-mentioned heat exchange element 6. As a result, it is possible to suppress blockage of each air passage due to peeling of adhesion between the heat transfer plate 13 and the rib 14 constituting the heat exchange element piece 15, which is caused by a dimensional change of the heat transfer plate 13 due to moisture absorption. It can be a heat exchange type ventilation device 2 provided with a possible heat exchange element 6.

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

Regarding the wording used above, the heat transfer plate 13 according to the present embodiment corresponds to the "partition member" of the claim, and the rib 14 corresponds to the "interval holding member" of the claim. Further, the heat exchange element piece 15 corresponds to the "unit component" of the claim, and the heat exchange element 6 corresponds to the "heat exchange element" of the claim. Further, the exhaust air passage 16 corresponds to the "exhaust air passage" of the claim, and the air supply air passage 17 corresponds to the "supply air air passage" of the claim. Further, the laminated body 6a corresponds to the "laminated body" of the claim. Further, the fiber direction 30 corresponds to the "fiber direction" of the claim.

As described above, in the heat exchange element according to the present embodiment, the wind is caused by the adhesive peeling between the heat transfer plate and the ribs constituting the heat exchange element piece, which is caused by the dimensional change of the heat transfer plate due to moisture absorption. Since it can suppress blockage of the road, it is useful as a heat exchange element used in a heat exchange type ventilation device or the like.

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 13a end Side 13b End side 13c End side 13d End side 14 Rib 15 Heat exchange element piece 16 Exhaust air passage 17 Air supply air passage 30 Fiber direction 40 Fiber member 41 Adhesive member 50 Laminating jig 51 Press machine 101 Heat exchange element 102 Heat exchange element single unit 103 Functional paper 104 Ribs 105 Paper cord 106 Hot melt resin 107 Air flow path

Claims (5)

A unit component having heat transferability and a partition member whose fiber direction is directed in a certain direction and a space-holding member extending along the fiber direction on one surface of the partition member is vertically placed. A heat exchange element characterized in that the exhaust air passage and the air supply air passage are alternately formed one layer at a time by stacking them in the direction. The heat exchange element according to claim 1, wherein the interval holding member is formed by twisting a plurality of fiber members. The heat exchange element according to claim 1 or 2, wherein the interval holding member and the partition member are fixed by an adhesive member. The heat exchange element according to any one of claims 1 to 3, wherein the interval holding member has a higher hygroscopicity than the partition member. A heat exchange type ventilation device comprising the heat exchange element according to any one of claims 1 to 4.

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