Method for manufacturing a heat exchange element

Abstract

To provide a method for producing a heat exchange element by which a rib and a heat transfer plate are hardly peeled off from each other when external force is generated on an outer surface of the heat exchange element, and reduction in a ventilation amount is suppressed.SOLUTION: A method for producing a heat exchange element comprises: a first process for forming a plurality of ribs (inner rib 14a, outer rib 14b) on one face of a heat transfer plate 13 and forming heat exchange element pieces 15; a second process for forming a laminate body 6a where the heat exchange element pieces 15 are alternately laminated one by one and are joined to each other; and a third process for crimping the laminate body 6a in a lamination direction and forming an exhaust air duct and an air supply air duct. In the second process, adhesive 41 is formed on the heat transfer plate 13 of a heat exchange element piece 15a on the front layer and the ribs 14 of the heat exchange element pieces 15b on the rear layer are laminated on and joined to each other, when laminating the heat exchange element pieces 15 one by one.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a heat exchange element that is used in cold regions and the like and exchanges heat between an exhaust air flow that exhausts indoor air to the outside and a supply air flow that supplies outside air to the inside.

Background Art

[0002] As the structure of a heat exchange element used in a conventional heat exchange ventilation device, in order to ensure reliability by improving the sealing property (sealing function for suppressing leakage of air flowing through the air flow path to the outside), for example, a structure as shown in Patent Document 1 is known.

[0003] FIG. 13 is an exploded perspective view showing the structure of a conventional heat exchange element.

[0004] As shown in FIG. 13, a conventional heat exchange element 101 is configured by laminating a plurality of heat exchange element units 102 each composed of a functional paper 103 having heat conductivity and ribs 104 in the vertical direction. On one surface of the functional paper 103, a plurality of ribs 104 each 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. By providing a plurality of ribs 104, a plurality of gaps are formed in the plane direction between a pair of heat exchange element units 102 laminated adjacent to each other vertically. A plurality of gaps provided in the plane direction form an air flow path 107. The heat exchange element 101 is configured such that the air flow paths 107 are laminated in the vertical direction, and the blowing directions of the air flow paths 107 adjacent to each other in the vertical direction are configured to be orthogonal to each other. Thereby, for each of the plurality of heat exchange element units 102 laminated in the vertical direction, by configuring the supply air flow and the exhaust air flow to ventilate alternately, heat exchange is performed between the supply air flow and the exhaust air flow.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the conventional heat exchange element 101, a rib 104 in which a substantially circular paper string 105 is coated with a hot melt resin 106 is formed on one surface of a functional paper 103, and by adhering it to the functional paper 103, the interval between the functional papers 103 is maintained, and the heat exchange element unit 102 in which the rib 104 is adhered to the functional paper 103 is alternately laminated. That is, when laminating the heat exchange element units 102, the hot melt resin 106 was applied to the rib 104 to combine the heat exchange element units 102. However, when applying the hot melt resin 106 to the surface of the rib 104, coating unevenness occurs on the surface of the rib 14, making it difficult to stably bond to the functional paper 103 to be laminated, and gaps are generated in the air passage formed by the heat exchange element unit 102. As a result, in the conventional method for manufacturing a heat exchange element, there is a problem that air flow is likely to leak from the gaps in the manufactured heat exchange element.

[0007] Therefore, the present invention aims to solve the above conventional problems and provides a method for manufacturing a heat exchange element in which air flow leakage from the air passage is less likely to occur.

Means for Solving the Problems

[0008] And in order to achieve this object, the method for manufacturing a heat exchange element according to the present invention stacks unit components each including a heat conductive partition member and a plurality of spacing holding members provided on one surface of the partition member to alternately form an exhaust air passage and an intake air passage one layer at a time, and is a method for manufacturing a heat exchange element in which an exhaust flow passing through the exhaust air passage and an intake flow passing through the intake air passage exchange heat via the partition member. The method for manufacturing a heat exchange element includes a first step of forming a plurality of spacing holding members on one surface of the partition member to form a unit component, a second step of alternately stacking the unit components one layer at a time and joining them together to form a laminate, and a third step of forming the exhaust air passage and the intake air passage by pressing the laminate in the stacking direction. And in the second step, when stacking the unit components one layer at a time, an adhesive member is formed on the partition member of the unit component in the previous layer and joined to the spacing holding member of the unit component in the subsequent layer. Thereby, the intended object is achieved.

Advantages of the Invention

[0009] According to the present invention, it is possible to provide a method for manufacturing a heat exchange element in which leakage of air flow from the air passage is less likely to occur.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

BEST MODE FOR CARRYING OUT THE INVENTION

[0011] The method of manufacturing a heat exchange element according to the present invention stacks unit constituent members each including a heat transfer partition member and a plurality of spacing holding members provided on one surface of the partition member, alternately forming an exhaust air passage and an intake air passage layer by layer, and is a method of manufacturing a heat exchange element in which an exhaust flow flowing through the exhaust air passage and an intake flow flowing through the intake air passage exchange heat through the partition member. The method of manufacturing a heat exchange element includes a first step of forming a plurality of spacing holding members on one surface of the partition member to form a unit constituent member, a second step of alternately stacking the unit constituent members layer by layer to form a laminate joined to each other, and a third step of forming the exhaust air passage and the intake air passage by pressing the laminate in the stacking direction. In the second step, when stacking the unit constituent members layer by layer, an adhesive member is formed on the partition member of the unit constituent member of the previous layer and joined to the spacing holding member of the unit constituent member of the subsequent layer.

[0012] According to such a method for manufacturing a heat exchange element, in the second step, an adhesive member can be formed uniformly without coating unevenness on the surface of the partition member of the unit constituent member of the front layer, and the unit constituent member of the rear layer to be laminated can be stably joined. As a result, it becomes possible to firmly join between the unit constituent member of the front layer and the unit constituent member of the rear layer. That is, in the heat exchange element manufactured thereby, when an external force is generated on the outer peripheral surface of the heat exchange element, peeling hardly occurs between the spacer member on the outer peripheral side and the partition member, and a decrease in the ventilation volume can be suppressed. Therefore, according to the method for manufacturing a heat exchange element described above, it is possible to manufacture a heat exchange element in which air leakage from the air passage hardly occurs.

[0013] Further, in the method for manufacturing a heat exchange element according to the present invention, in the second step, it is preferable to form an adhesive member at a portion that becomes a contact point between the partition member of the front layer and the spacer member of the unit constituent member of the rear layer, and join the spacer member of the unit constituent member of the rear layer to the contact point. Thereby, the spacer member of the unit constituent member of the rear layer can be surely formed at a predetermined position on the partition member of the front layer and a predetermined adhesive force can be exhibited.

[0014] Further, in the method for manufacturing a heat exchange element according to the present invention, in the second step, after joining the spacer members of the unit constituent members of the rear layer, the extended portion of the partition member of the front layer may be joined to the partition member of the rear layer. By doing so, since the spacer member for maintaining the interval between the end sides of the rear layer is covered with the partition member of the front layer, the outer peripheral surface of the heat exchange element can be firmly formed. As a result, when an external force is generated on the outer peripheral surface of the heat exchange element, it is possible to manufacture a heat exchange element in which peeling hardly occurs between the spacer member on the outer peripheral side and the partition member, and a decrease in the ventilation volume can be further suppressed.

[0015] In addition, in the method for manufacturing a heat exchange element according to the present invention, before the first step, a fourth step of adjusting a spacing holding member may be provided. In the fourth step, a predetermined first spacing holding member is swelled by absorbing water and then dried to obtain a second spacing holding member, and the second spacing holding member may be adjusted as the spacing holding member. By doing so, the spacing holding member made of the second spacing holding member is less likely to absorb water and moisture and expand after the manufacture of the heat exchange element, and breakage of the adhesive member that adheres the spacing holding member and the partition member can be suppressed. That is, in the heat exchange element manufactured thereby, when an external force is generated on the outer peripheral surface of the heat exchange element, peeling between the outer peripheral side spacing holding member and the partition member is less likely to occur, and a decrease in the ventilation rate can be suppressed. Therefore, according to the method for manufacturing a heat exchange element described above, a heat exchange element in which air leakage from the air passage is less likely to occur can be manufactured.

[0016] Further, in the method for manufacturing a heat exchange element according to the present invention, in the fourth step, it is preferable to form a molten layer on a part of the surface of the second spacing holding member to obtain a third spacing holding member, and adjust the third spacing holding member as the spacing holding member. Thereby, since the rigidity of the surface of the spacing holding member is improved by the molten layer, the spacing holding member is less likely to absorb water and moisture and expand, and breakage of the adhesive member that adheres the spacing holding member and the partition member can be further suppressed.

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples embodying the present invention and do not limit the technical scope of the present invention. In addition, each drawing described in the embodiments is a schematic diagram, and the ratio of the size and thickness of each component in each drawing does not necessarily reflect the actual dimensional ratio.

[0018] (Embodiment 1) First, with reference to FIGS. 1 and 2, an outline of a heat exchange 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 a heat exchange ventilation device 2 including a heat exchange element 6 according to Embodiment 1 of the present invention in a house (house 1). FIG. 2 is a schematic diagram showing the structure of the heat exchange ventilation device 2.

[0019] In FIG. 1, a heat exchange type ventilation device 2 is installed indoors in house 1. The heat exchange type ventilation device 2 is a device that ventilates while exchanging heat between indoor air and outdoor air in house 1.

[0020] As shown in FIG. 1, the exhaust air flow 3 is discharged from indoors to outdoors in house 1 through the heat exchange type ventilation device 2 as shown by the black arrow in FIG. 1. The exhaust air flow 3 is the flow of air discharged from indoors to outdoors in house 1. Also, the supply air flow 4 is the flow of air taken into indoors from outdoors in house 1 through the heat exchange type ventilation device 2 as shown by the white arrow in FIG. 1. That is, the supply air flow 4 is the flow of air taken into indoors from outdoors in house 1. For example, in the case of winter in Japan, the exhaust air flow 3 is 20°C to 25°C, and the supply air flow 4 may reach below freezing. The heat exchange type ventilation device 2 ventilates and transfers the heat of the exhaust air flow 3 to the supply air flow 4 during ventilation, suppressing the release of unnecessary heat, that is, the heat discharged outdoors by the exhaust air flow 3 can be taken into indoors by the supply air flow 4.

[0021] 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 indoor air inlet 8, an exhaust port 9, a supply air fan 10, an outdoor air inlet 11, and a supply air port 12. The main body case 5 is the outer frame of the heat exchange type ventilation device 2. The indoor air inlet 8, the exhaust port 9, the outdoor air inlet 11, and the supply air port 12 are formed on the outer periphery of the main body case 5. The indoor air inlet 8 is a suction port that sucks the exhaust air flow 3 from indoors into the heat exchange type ventilation device 2. The exhaust port 9 is a discharge port that discharges the exhaust air flow 3 from the heat exchange type ventilation device 2 to outdoors. The outdoor air inlet 11 is a suction port that sucks the supply air flow 4 from outdoors into the heat exchange type ventilation device 2. The supply air port 12 is a discharge port that discharges the supply air flow 4 from the heat exchange type ventilation device 2 to indoors.

[0022] Inside the main body case 5, a heat exchange element 6, an exhaust fan 7, and an air supply fan 10 are installed. The heat exchange element 6 is a member for performing heat exchange between the exhaust flow 3 and the air supply flow 4. The exhaust fan 7 is a blower that sucks the exhaust flow 3 from indoors through the indoor air inlet 8 and discharges it outdoors through the exhaust port 9. The air supply fan 10 is a blower that sucks the air supply flow 4 from outdoors through the outdoor air inlet 11 and discharges it indoors through the air supply port 12. By driving the exhaust fan 7, the exhaust flow 3 sucked from indoors through the indoor air inlet 8 passes through the heat exchange element 6 and the exhaust fan 7 and is discharged outdoors through the exhaust port 9. Also, by driving the air supply fan 10, the air supply flow 4 sucked from outdoors through the outdoor air inlet 11 passes through the air supply fan 10 and is supplied indoors through the air supply port 12.

[0023] 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 ventilation device 2. FIG. 4 is a partial enlarged view showing the structure of the rib 14 that constitutes the heat exchange element 6. The rib 14 has an inner rib 14a and an outer rib 14b, but hereinafter, when there is no need to particularly distinguish between them, it is simply referred to as the rib 14.

[0024] 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 (inner rib 14a and outer rib 14b described later) are adhered under one surface of a substantially square heat transfer plate 13 to each heat exchange element piece 15. The heat exchange element 6 is configured such that the longitudinal directions of the ribs 14 of the heat exchange element pieces 15 adjacent in the stacking direction (vertical direction) are orthogonal to each other, and a plurality of them are stacked by changing the orientation of the adjacent heat exchange element pieces 15. Thereby, the exhaust air passage 16 through which the exhaust flow 3 ventilates and the air supply air passage 17 through which the air supply flow 4 ventilates can be alternately provided in the stacking direction of the heat exchange element pieces 15. Therefore, since the exhaust flow 3 and the air supply flow 4 flow alternately and orthogonally in the stacking direction of the heat exchange element pieces 15, heat exchange can be performed between the exhaust flow 3 and the air supply flow 4 through the heat transfer plate 13.

[0025] The heat exchange element piece 15 is one unit that constitutes the heat exchange element 6. As described above, the heat exchange element piece 15 is configured by adhering a plurality of ribs 14 under one surface of a substantially square heat transfer plate 13. The ribs 14 under the heat transfer plate 13 are formed such that the longitudinal direction is from one end side of the heat transfer plate 13 toward the opposite end side. Each of the plurality of ribs 14 is formed linearly. And the plurality of ribs 14 are arranged in parallel at a predetermined interval under the surface of the heat transfer plate 13. Specifically, as shown in FIG. 3, among two heat exchange element pieces 15 adjacent vertically, under one surface of the heat transfer plate 13 that constitutes one heat exchange element piece 15, the ribs 14 are adhered such that the longitudinal direction of the ribs 14 is from the end side 13a of this heat transfer plate 13 toward the opposite end side 13c. Also, under one surface of the heat transfer plate 13 that constitutes the other heat exchange element piece 15, the ribs 14 are adhered such that the longitudinal direction of the ribs 14 is from the end side 13b (the end side perpendicular to the end side 13a) of the heat transfer plate 13 that constitutes the above one heat exchange element piece 15 toward the opposite end side 13d. In particular, the outer rib 14b described later is formed along the end sides 13b and 13d at the end side (outer edge) of the heat transfer plate 13 that is the outermost peripheral position of the rib 14.

[0026] The heat transfer plate 13 is a plate-like member for heat exchange when the exhaust gas flow 3 and the supply air flow 4 flow while sandwiching the heat transfer plate 13. The heat transfer plate 13 is a thin sheet having heat conductivity, and a sheet having the property of not allowing gas to permeate can be used. The heat transfer plate 13 is formed of heat transfer paper based on cellulose fiber, and has heat conductivity, moisture permeability, and hygroscopicity, and a heat exchange element 6 that exchanges heat and moisture can be obtained. However, the material of the heat transfer plate 13 is not limited to this. The heat transfer plate 13 can obtain a heat exchange element 6 that exchanges only heat by using, for example, a metal sheet such as aluminum or iron, or a resin sheet such as polyethylene or polypropylene. Further, a heat exchange element 6 that exchanges moisture in addition to heat can be obtained by using a moisture-permeable resin film based on polyurethane, polyethylene terephthalate, etc., or a paper material based on cellulose fiber, ceramic fiber, or glass fiber.

[0027] The plurality of ribs 14 are provided between a pair of opposite end sides of the heat transfer plate 13 and are formed so as to extend from one end side toward the other end side. The rib 14 is a member for forming a gap for ventilating the exhaust flow 3 or the supply air flow 4 between the heat transfer plates 13 when stacking the heat transfer plates 13, that is, an exhaust air passage 16 or a supply air passage 17. More specifically, as shown in FIG. 3, the plurality of ribs 14 include outer ribs 14b arranged along the end sides (outer edges) 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 end side 13b or the end side 13d at the outer edge of the heat transfer plate 13 that is the outermost peripheral position of the ribs 14 among the plurality of ribs 14. The inner rib 14a is a rib formed in a region sandwiched between the outer ribs 14b at both ends among the plurality of ribs 14. In addition, in the first embodiment, the outer rib 14b and the inner rib 14a are configured to have the same member and the same structure.

[0028] As shown in FIG. 4, each of the plurality of ribs 14 (outer rib 14b, inner rib 14a) has a substantially circular cross section. The rib 14 is composed of a plurality of fiber members 40 and is fixed to the heat transfer plate 13 via an adhesive 41.

[0029] Each of the fiber members 40 has a substantially circular cross section and is a member extending in the same direction as the rib 14. As the material of the fiber member 40, it suffices to have hygroscopicity and a certain strength. For example, resin members such as polypropylene, polyethylene, polyethylene terephthalate, or polyamide, or paper materials, cotton, silk, or hemp based on cellulose fibers, ceramic fibers, or glass fibers can be used.

[0030] The adhesive 41 preferably contains a chemical agent that exhibits adhesiveness to the rib 14. For example, when using a paper string for the rib 14, a vinyl acetate resin-based adhesive with good adhesiveness to hydrophilic paper can be mentioned. Also, depending on the manufacturing method, a curing method such as moisture curing, pressure curing, or UV curing can be selected. However, not limited to these chemical agents, known adhesives and adhesion methods can be used according to the material of the rib 14, and there is no difference in the effect.

[0031] Next, with reference to FIGS. 5 to 7, a method for manufacturing the heat exchange element 6 will be described. FIG. 5 is a cross-sectional view for explaining a method for manufacturing the heat exchange element piece 15 that constitutes the heat exchange element 6. Here, FIG. 5(a) is a cross-sectional view showing a step of applying the adhesive 41 to the portion P that becomes the contact point of the rib 14 of the heat transfer plate 13. FIG. 5(b) is a cross-sectional view showing a step of aligning the position of the rib 14 to be joined to the adhesive 41 applied to the heat transfer plate 13. FIG. 5(c) is a cross-sectional view showing a step of joining the rib 14 to the adhesive 41 applied to the heat transfer plate 13.

[0032] Also, FIG. 6 is a cross-sectional view for explaining a method for manufacturing the heat exchange element 6. Here, FIG. 6(a) is a cross-sectional view showing a step of applying the adhesive 41 to the portion P that becomes the contact point of the rib 14 of the heat transfer plate 13 of the heat exchange element piece 15a of the previous layer. FIG. 6(b) is a cross-sectional view showing a step of aligning the position of the rib 14 of the heat exchange element piece 15b of the subsequent layer to be joined to the adhesive 41 applied to the heat transfer plate 13. FIG. 6(c) is a cross-sectional view showing a step of joining the rib 14 to the adhesive 41 applied to the heat transfer plate 13.

[0033] Also, FIG. 7 is a cross-sectional view for explaining a method for manufacturing the heat exchange element 6. Here, FIG. 7(a) is a cross-sectional view showing a step of compressing the laminate 6a in which the heat exchange element pieces 15 are laminated in the lamination direction to form an air passage having a predetermined interval in the lamination direction. FIG. 7(b) is a cross-sectional view showing the heat exchange element 6 produced by compressing the laminate 6a in the lamination direction.

[0034] The manufacturing method of the heat exchange element 6 includes a first step of forming a plurality of ribs 14 on one surface of the heat transfer plate 13 to form a heat exchange element piece 15, a second step of forming a laminate 6a by alternately laminating the heat exchange element pieces 15 one by one, and a third step of forming an exhaust air passage 16 and an air supply passage 17 having a predetermined interval in the lamination direction by compressing the laminate 6a in the lamination direction.

[0035] Hereinafter, each step (the first step to the third step) will be specifically described.

[0036] First, in the first step, as shown in FIG. 5(a), an adhesive 41 is applied to a portion P that becomes a contact point of a plurality of ribs 14 arranged with a predetermined interval on one surface of the heat transfer plate 13. Further, at the portion P that becomes a contact point, the adhesive 41 is applied to the heat transfer plate 13 so as to be equal to or less than the width of the rib 14. Note that the portion P that becomes a contact point of the rib 14 can also be said to be a region that becomes a joint portion of the rib 14. Next, as shown in FIG. 5(b), the rib 14 is aligned to a predetermined position. The both ends of the rib 14 are pulled so that the rib 14 does not loosen. Then, as shown in FIG. 5(c), the rib 14 and the heat transfer plate 13 are fixed to form a heat exchange element piece 15. Until the adhesive 41 hardens, a predetermined pressure is applied to the adhesive surface from the lamination direction so that air does not enter the gap of the adhesive 41. In this way, in the first step, the steps shown in FIGS. 5(a) to 5(c) are repeated to form a plurality of heat exchange element pieces 15. Note that the plurality of pieces is the number of pieces required to manufacture the heat exchange element 6.

[0037] Next, in the second step, as shown in Fig. 6(a), an adhesive 41 is applied to each portion P that becomes a contact point of a plurality of ribs 14 arranged with a predetermined interval on the surface of the heat transfer plate 13 in the heat exchange element piece 15a of the previous layer where the rib 14 is not fixed (the surface on the opposite side of one surface of the heat transfer plate 13). Similar to the step shown in Fig. 5(a), the adhesive 41 is applied to the heat transfer plate 13 so as to be equal to or less than the width of the rib 14. Next, as shown in Fig. 6(b), the ribs 14 of the heat exchange element piece 15b of the subsequent layer are aligned at predetermined positions. At this time, the heat exchange element piece 15b of the subsequent layer is made orthogonal to the heat exchange element piece 15a of the previous layer. Both sides orthogonal to the rib 14 of the heat exchange element piece 15a of the previous layer are pulled so that the heat exchange element piece 15a of the previous layer does not wrinkle. Then, as shown in Fig. 6(c), the rib 14 and the heat transfer plate 13 of the heat exchange element piece 15a of the previous layer are fixed. At this time, similar to the step shown in Fig. 5(c), until the adhesive 41 hardens, a predetermined pressure is applied to the bonding surface from the stacking direction (vertical direction) so that air does not enter the gap of the adhesive 41. Then, such steps are repeated alternately layer by layer with the orientation changed to form a laminate 6a in which all the heat exchange element pieces 15 are stacked.

[0038] Finally, in the third step, as shown in Fig. 7(a), the laminate 6a of the heat exchange element pieces 15 formed in the above-described steps is pressure-bonded from the stacking direction (vertical direction) of the heat exchange element pieces 15. A barrier is provided around the laminate 6a to perform uniform pressure-bonding from the stacking direction so that the bonding positions of the heat transfer plate 13 and the rib 14 joined by the adhesive 41 do not shift. Then, as shown in Fig. 7(b), the upper and lower heat exchange element pieces 15 are fixed to form a heat exchange element 6. Thereby, a heat exchange element 6 is formed in which air passages (exhaust air passage 16, supply air passage 17) having a predetermined interval (interval corresponding to the height of the rib 14) in the stacking direction of the heat exchange element pieces 15 are formed.

[0039] Here, the problems of the conventional method for manufacturing a heat exchange element will be described again with reference to FIG. 8. FIG. 8 is a cross-sectional view for explaining the method for manufacturing a heat exchange element according to a comparative example. Here, FIG. 8(a) is a cross-sectional view showing a step of applying an adhesive 41 to a rib 14 of a heat exchange element piece 15a of a front layer. FIG. 8(b) is a cross-sectional view showing a step of aligning the position of a heat transfer plate 13 of a heat exchange element piece 15b of a rear layer to be joined to the adhesive 41 applied to the rib 14. FIG. 8(c) is a cross-sectional view showing a step of joining the heat transfer plate 13 to the adhesive 41 applied to the rib 14. Note that the method for manufacturing a heat exchange element according to the comparative example corresponds to the conventional method for manufacturing a heat exchange element.

[0040] As shown in FIG. 8(a), when alternately laminating the heat exchange element pieces 15, if the rib 14 has a substantially circular shape, when the adhesive 41 is applied to the surface of the rib 14, the adhesive 41 may be unevenly applied to the surface of the rib 14.

[0041] Then, as shown in FIG. 8(b), even when trying to join the heat transfer plate 13 of the heat exchange element piece 15b of the rear layer to the rib 14 of the heat exchange element piece 15a of the front layer on which the unevenly applied adhesive 41 is formed, it is difficult to achieve a stable joint between the rib 14 of the heat exchange element piece 15a of the front layer and the heat transfer plate 13 of the heat exchange element piece 15b of the rear layer, and a gap is generated between the rib 14 and the heat transfer plate 13 due to the uneven coating. As a result, the airflow is likely to leak from the air passage of the heat exchange element. Such a state is a problem in the heat exchange element manufactured by the method for manufacturing a heat exchange element according to the comparative example.

[0042] On the other hand, in the method for manufacturing the heat exchange element 6 (second step) according to the present embodiment, as shown in FIG. 6(a), the adhesive 41 is applied to the heat transfer plate 13 on the surface where the rib 14 of the heat exchange element piece 15a of the front layer is not joined. Therefore, the adhesive 41 is evenly applied to the sheet-like heat transfer plate 13, enabling a stable joint.

[0043] As described above, according to the method for manufacturing the heat exchange element 6 according to the first embodiment, the following effects can be obtained.

[0044] (1) The manufacturing method of the heat exchange element 6 stacks heat exchange element pieces 15 each including a heat transfer plate 13 having heat conductivity and a plurality of ribs 14 provided on one surface of the heat transfer plate 13 to alternately form the exhaust air passage 16 and the supply air passage 17 layer by layer, and is a manufacturing method of the heat exchange element 6 in which the exhaust air flow 3 flowing through the exhaust air passage 16 and the supply air flow 4 flowing through the supply air passage 17 exchange heat through the heat transfer plate 13. The manufacturing method of the heat exchange element 6 includes a first step of forming a plurality of ribs 14 on one surface of the heat transfer plate 13 to form the heat exchange element piece 15, a second step of alternately stacking the heat exchange element pieces 15 layer by layer to form a laminate 6a joined to each other, and a third step of forming the exhaust air passage 16 and the supply air passage 17 by pressing the laminate 6a in the stacking direction. In the second step, when stacking the heat exchange element pieces 15 layer by layer, an adhesive 41 is formed on the heat transfer plate 13 of the heat exchange element piece 15a in the previous layer and joined to the ribs 14 of the heat exchange element piece 15b in the subsequent layer.

[0045] According to such a manufacturing method of the heat exchange element 6, in the second step, the adhesive 41 can be formed uniformly without coating unevenness on the surface of the heat transfer plate 13 of the heat exchange element piece 15a in the previous layer, and the heat exchange element piece 15b in the subsequent layer to be stacked can be stably joined. As a result, it becomes possible to firmly join between the heat exchange element piece 15a in the previous layer and the heat exchange element piece 15b in the subsequent layer. That is, in the heat exchange element manufactured thereby, when an external force is generated on the outer peripheral surface of the heat exchange element 6, peeling is less likely to occur between the outer peripheral rib 14 (outer rib 14b) and the heat transfer plate 13, and a decrease in the ventilation volume can be suppressed. That is, according to the manufacturing method of the heat exchange element 6 described above, it is possible to manufacture the heat exchange element 6 in which air flow leakage from the air passage is less likely to occur.

[0046] (2) In the manufacturing method of the heat exchange element 6, in the second step, the adhesive 41 is applied to the portion P that becomes the contact point of the ribs 14 of the subsequent layer with respect to the heat transfer plate 13 of the heat exchange element piece 15a in the previous layer. Thereby, the adhesive force between the heat transfer plate 13 and the ribs 14 is strengthened, and it is possible to manufacture the heat exchange element 6 in which air flow leakage from the air passage is less likely to occur.

[0047] (3) In the method for manufacturing the heat exchange element 6, in the second step, with respect to the heat transfer plate 13 of the heat exchange element piece 15a of the front layer, the rib 14 of the rear layer is fixed to the adhesive 41 on the heat transfer plate 13 while being pulled. As a result, the rib 14 is prevented from being bent, and it can be surely joined to the adhesive 41 applied on the heat transfer plate 13. That is, the adhesive force between the heat transfer plate 13 and the rib 14 can be strengthened, and the heat exchange element 6 in which leakage of the air flow from the air passage is unlikely to occur can be manufactured.

[0048] (Embodiment 2) Next, with reference to FIGS. 9 and 10, a method for manufacturing the heat exchange element 26 according to Embodiment 2 of the present invention will be described. FIG. 9 is a cross-sectional view for explaining the method for manufacturing the heat exchange element 26 according to Embodiment 2 of the present invention. Here, FIG. 9(a) is a cross-sectional view showing a step of applying the adhesive 41a to the portion P1 that becomes the contact point of the outer rib 24b of the heat transfer plate 23 of the heat exchange element piece 25a of the front layer and the extended portion thereof, and the portion P2 that becomes the contact point of the inner rib 24a. FIG. 9(b) is a cross-sectional view showing a step of aligning the positions of the ribs 24 (inner rib 24a, outer rib 24b) of the heat exchange element piece 25b of the rear layer to be joined to the adhesive 41a applied to the heat transfer plate 23. FIG. 9(c) is a cross-sectional view showing a step of joining the rib 24 to the adhesive 41a applied to the heat transfer plate 23. FIG. 9(d) is a cross-sectional view showing a step of winding and joining the extended portion of the heat transfer plate 23 of the heat exchange element piece 25a of the front layer to which the adhesive 41a is applied to the opposite side of the portion where the outer rib 24b of the heat transfer plate 23 of the heat exchange element piece 25a of the front layer is adhered.

[0049] Further, FIG. 10 is a cross-sectional view for explaining the method for manufacturing the heat exchange element 26. Here, FIG. 10(a) is a cross-sectional view showing a step of compressing the laminate 26a in which the heat exchange element pieces 25 are laminated in the lamination direction to form an air passage having a predetermined interval in the lamination direction. FIG. 10(b) is a cross-sectional view showing the heat exchange element 26 created by compressing the laminate 26a in the lamination direction.

[0050] In the manufacturing method of the heat exchange element 26 according to Embodiment 2, the heat transfer plate 23 of the heat exchange element piece 25a in the previous layer is manufactured so as to extend to a position covering the outer rib 24b with the heat transfer plate 23 of the heat exchange element piece 25b in the subsequent layer interposed therebetween, which is different from the manufacturing method of the heat exchange element 6 according to Embodiment 1. The manufacturing method of the heat exchange element 26 other than this is the same as the manufacturing method of the heat exchange element 6 according to Embodiment 1. Hereinafter, the contents already described in Embodiment 1 will be appropriately omitted from further explanation, and the points different from Embodiment 1 will be mainly described. Also, the rib 24, the heat exchange element piece 25, the adhesive 41a, and the heat exchange element 26 correspond to the respective members of the rib 14, the heat exchange element piece 15, the adhesive 41, and the heat exchange element 6 in Embodiment 1. However, the heat transfer plate 23 is different from the heat transfer plate 13 in Embodiment 1 in that the dimension in the direction orthogonal to the rib 24 joined to the upper surface is longer than the dimension in the direction parallel to the rib 24.

[0051] As shown in FIG. 9(a), the position of the heat transfer plate 23 is adjusted so that the heat transfer plate 23 exists outside the position where the outer rib 24b is joined. Then, the adhesive 41a is applied to the portion P2 that becomes the contact point of the inner rib 24a and the portion P1 that becomes the contact point of the outer rib 24b and the extended portion thereof with respect to the heat transfer plate 23, respectively. The portions P1 and P2 that become the contact points of the rib 24 correspond to the portion P that becomes the contact point of the rib 14 in Embodiment 1 and are the same. Here, at the portion P1 that becomes the contact point, the adhesive 41a is applied to the heat transfer plate 23 continuously with the extended portion, and at the portion P2 that becomes the contact point, the adhesive 41a is applied to the heat transfer plate 23 so as to be equal to or less than the width of the inner rib 24a. In addition, at the portion P1 that becomes the contact point of the outer rib 24b, since the heat transfer plates 23 of the previous layer and the subsequent layer overlap, it is preferable to form the coating film thickness at the portion P2 that becomes the contact point thicker than the coating film thickness at the portion P1 that becomes the contact point.

[0052] Next, as shown in FIG. 9(b), the heat exchange element piece 25b in the subsequent layer is aligned to a predetermined position. The two ends of the rib 24 are pulled so that the rib 24 does not loosen.

[0053] Next, as shown in FIG. 9(c), the rib 24 and the heat transfer plate 23 are fixed. At this time, until the adhesive 41a hardens, a predetermined pressure is applied to the adhesive surface in the stacking direction (vertical direction) so that air does not enter the gap of the adhesive 41a.

[0054] Then, as shown in FIG. 9(d), the heat transfer plate 23 extending outside the outer rib 24b of the heat exchange element piece 25a of the previous layer is extended and joined so as to cover the outer rib 24b and the heat transfer plate 23 of the heat exchange element piece 25b of the subsequent layer to form a laminate 26a. At this time, the gap between the outer rib 24b and the heat transfer plate 23 covering the outer rib 24b is filled with the adhesive 41a so that there is no gap. Then, in the same manner as the process shown in FIG. 5(c), until the adhesive 41a hardens, a predetermined pressure is applied to the adhesive surface in the stacking direction so that air does not enter the gap of the adhesive 41a. Then, such processes are repeated alternately layer by layer while changing the direction to form a laminate 26a in which all the heat exchange element pieces 25 are stacked.

[0055] As shown in FIG. 10(a), the laminate 26a of the heat exchange element pieces 25 formed in the above-described process is pressure-bonded from the stacking direction (vertical direction) of the heat exchange element pieces 25. Similar to the process shown in FIG. 7(a), a barrier is provided around the laminate 26a so that the bonding positions of the heat transfer plate 23 and the rib 24 bonded by the adhesive 41a do not shift, and pressure-bonding is performed evenly from the stacking direction. Then, as shown in FIG. 10(b), the upper and lower heat exchange element pieces 15 are fixed to form a heat exchange element 26. Thereby, a heat exchange element 26 is formed in which air passages (exhaust air passage 16, supply air passage 17) having a predetermined interval (interval corresponding to the height of the rib 24) in the stacking direction of the heat exchange element pieces 25 are formed.

[0056] As described above, according to the heat exchange element 26 and the method for manufacturing the heat exchange element 26 according to the second embodiment, the following effects can be obtained.

[0057] (4) In the method for manufacturing the heat exchange element 26, in the second step, after joining the ribs 24 of the heat exchange element piece 25 of the rear layer, the epitaxial portion of the heat transfer plate 13 of the front layer is joined to the heat transfer plate 23 of the rear layer. Thereby, since the outer rib 24b at the end side of the rear layer is covered by the heat transfer plate 23 of the front layer, the outer peripheral surface of the heat exchange element 26 can be firmly formed. As a result, when an external force is generated on the outer peripheral surface of the heat exchange element 26, peeling is less likely to occur between the outer peripheral rib 24 and the heat transfer plate 23, and it is possible to manufacture the heat exchange element 26 capable of further suppressing a decrease in the ventilation volume.

[0058] (5) The heat exchange element 26 is formed by laminating heat exchange element pieces 25 each including a heat transfer plate 23 having heat conductivity and a plurality of ribs 24 provided on one surface of the heat transfer plate 23, alternately forming the exhaust air passage 16 and the supply air passage 17 one layer at a time, and the exhaust air flow 3 flowing through the exhaust air passage 16 and the supply air flow 4 flowing through the supply air passage 17 exchange heat through the heat transfer plate 23. Further, the rib 24 is fixed to the heat transfer plate 23 by an adhesive 41a provided between the rib 24 and the heat transfer plate 23, and has an outer rib 24b located at the end side of the heat transfer plate 23 and an inner rib 24a located inside the heat transfer plate 23. And the heat transfer plate 23 of the front layer is formed so as to cover the outer peripheral side surface side of the heat exchange element 26 on the side surface of the outer rib 24b of the rear layer and the heat transfer plate 23 of the rear layer. Thereby, in addition to the adhesion of the heat transfer plate 23 of the front layer to the outer peripheral surface of the outer rib 24b of the rear layer, the heat transfer plate 23 of the front layer covering the outer rib 24b of the rear layer is also adhered. Therefore, the adhesive strength can be increased by the area of the adhesion surface between the heat transfer plate 23 of the front layer and the outer rib 24b of the rear layer and the heat transfer plate 23 of the rear layer. As a result, when an external force is generated on the outer peripheral surface of the heat exchange element 26, peeling is less likely to occur between the outer rib 24b and the heat transfer plate 23, and a decrease in the ventilation volume can be suppressed. That is, it is possible to obtain the heat exchange element 26 in which leakage of the air flow from the air passage is less likely to occur.

[0059] (Embodiment 3) In the method for manufacturing a heat exchange element according to Embodiment 3 of the present invention, it is different from Embodiment 1 in that, instead of the rib 14 fixed to the heat transfer plate 13 of the heat exchange element 6 according to Embodiment 1, a rib 34 obtained by swelling and drying the rib 14 by absorbing water is used. The method for manufacturing the heat exchange element other than this is the same as the method for manufacturing the heat exchange element 6 according to Embodiment 1. Hereinafter, the contents already described in Embodiment 1 will be appropriately omitted from the description again, and the points different from Embodiment 1 will be mainly described.

[0060] Referring to FIG. 11, the rib 34 used in the manufacture of the heat exchange element according to Embodiment 3 of the present invention will be described. FIG. 11 is a schematic diagram for explaining the rib 34 used in the manufacture of the heat exchange element according to Embodiment 3 of the present invention. Here, (a) of FIG. 11 is a perspective view showing a rib 34a corresponding to the rib 14. (b) of FIG. 11 is a perspective view showing a rib 34b in a state where the rib 34a is swollen by absorbing water. (c) of FIG. 11 is a perspective view showing a rib 34c in a state where the rib 34b is dried.

[0061] In the method for manufacturing a heat exchange element according to Embodiment 3, before performing the first step (the step of forming a plurality of ribs 14 on one surface of the heat transfer plate 13 to form the heat exchange element piece 15) in Embodiment 1, a fourth step of adjusting the rib 34 used in the first step is performed.

[0062] Specifically, in the fourth step, by performing the following first step to third step, a predetermined rib 34a is swollen by absorbing water and then dried to obtain a rib 34c, and the rib 34c in such a state is adjusted as the rib 34 used in the first step.

[0063] First, as the first step, a rib 34a is prepared. The rib 34a is made of the same material as the rib 14 and is composed of a plurality of fiber members 40 shown in FIG. 4. As shown in (a) of FIG. 11, the rib 34a has a substantially circular cross section, and for example, has a cross section with a diameter Da. Note that the diameter Da also corresponds to the thickness of the rib 34a in the vertical direction.

[0064] Then, as a second step, the rib 34a is immersed in a storage tank that stores water for a certain period of time. As a result, the rib 34a sucks in the water in the storage tank and swells, for example, by widening the spacing between the fiber members 40. Then, by absorbing water and swelling, the rib 34a becomes the rib 34b. The rib 34b has, for example, a cross-section with a diameter Db. The diameter Db of the rib 34b is larger than the diameter Da of the rib 34a due to swelling.

[0065] Thereafter, as a third step, the rib 34b is dried under predetermined conditions. Drying is performed, for example, by storing the rib 34b in a constant temperature chamber at about 40°C for 24 hours. As a result, the rib 34b releases the water absorbed inside and dries while maintaining substantially the state where the spacing between the fiber members 40 is widened. Then, by drying, the rib 34b becomes the rib 34c. The rib 34c has, for example, a cross-section with a diameter D. The diameter D of the rib 34c is slightly smaller than the diameter Db of the rib 34b.

[0066] As described above, in the fourth step, a predetermined rib 34a is swelled by absorbing water and then dried to produce the rib 34c, that is, the rib 34. Then, this fourth step is repeated to prepare the required number of ribs 34 in the first step.

[0067] Subsequently, the above-described first step to the third step are sequentially executed, and the heat exchange element according to Embodiment 3 is manufactured.

[0068] As described above, according to the method for manufacturing a heat exchange element according to Embodiment 3, the following effects can be obtained.

[0069] (6) In the method for manufacturing the heat exchange element 6 described above, before the first step, there is a fourth step of adjusting the rib 34. In the fourth step, after swelling a predetermined rib 34a by absorbing water and then drying it to obtain a rib 34c, the rib 34c is adjusted as the rib 34. As a result, compared with the rib without performing the fourth step, the rib 34 composed of the rib 34c is less likely to absorb and adsorb water and expand after the manufacture of the heat exchange element, and it is possible to suppress the breakage of the adhesive 41 that bonds the rib 34 and the heat transfer plate 13. That is, in the heat exchange element manufactured in this way, when an external force is generated on the outer peripheral surface of the heat exchange element, peeling between the outer peripheral rib 34 and the heat transfer plate 13 is less likely to occur, and a decrease in the ventilation volume can be suppressed. Therefore, according to the method for manufacturing the heat exchange element described above, it is possible to manufacture a heat exchange element in which air leakage from the air passage is less likely to occur.

[0070] (Modification example) In the method for manufacturing a heat exchange element according to a modification of Embodiment 3, it is different from Embodiment 3 in that, instead of the rib 34, a rib 34z in which a part of the surface of the rib 34 is heated and melted is used. The method for manufacturing the heat exchange element other than this is the same as the method for manufacturing the heat exchange element according to Embodiment 3. Hereinafter, the contents already described in Embodiment 3 will be appropriately omitted from further explanation, and the points different from Embodiment 3 will be mainly described.

[0071] Referring to FIG. 12, the rib 34z used in the manufacture of the heat exchange element according to the modification of Embodiment 3 will be described. FIG. 12 is a schematic diagram for explaining the rib 34z used in the manufacture of the heat exchange element according to the modification of Embodiment 3. Here, (a) of FIG. 12 is a cross-sectional view showing a method of forming the rib 34z by hot pressing the rib 34. (b) of FIG. 12 is a perspective view showing the structure of the rib 34z.

[0072] In the method for manufacturing a heat exchange element according to the modification of Embodiment 3, in the fourth step, following the above-described first step to third step, a fourth step is further performed. By performing the fourth step, a fiber melting layer 35 is formed on the upper and lower surfaces of the rib 34 to obtain a rib 34z, and the rib 34z in such a state is adjusted as the rib used in the first step.

[0073] In the fourth step, ribs 34 are prepared. As shown in Fig. 12(a), the heated heat roll 71 is pressed against the ribs 34 from above and below, and rotated so as to be fed out in one direction, thereby forming rib 34z. Specifically, the rib 34 is crushed in the pressing direction by being pressed by the heat roll 71, and the cross-section of the rib 34 changes to a flat shape. At this time, by heating the pressed surface, the fiber member 40 (see Fig. 4) at the portion where the upper and lower heat rolls 71 contact is melted or welded, and the fiber melting layer 35 is selectively formed.

[0074] Here, as the pressing means, known methods can be used, for example, a flat plate press or a roll press. In this case, by adjusting the position of the heat roll 71 in the pressing direction (the distance between the upper and lower heat rolls 71), the width and height of the rib 34z having the fiber melting layer 35 (the height of the air passage of the heat exchange element 6) can be easily adjusted.

[0075] Also, as the heating means, known methods can be used, for example, hot air, flame, non-contact heating by electromagnetic induction, or contact heating by a heater. When accompanied by pressing, contact heating is particularly preferred. In this modification, the fiber melting layer 35 is formed by heating while pressing, but the fiber melting layer 35 may also be formed by pressing the once heated and melted material before re-hardening. At this time, by cooling simultaneously during pressing, the shape during pressing can be fixed more firmly.

[0076] Finally, by cutting the rib 34z after passing through the heat roll 71 at a predetermined length, the rib 34z having the fiber melting layer 35 is formed.

[0077] Subsequently, the first to third steps described above are sequentially executed, and the heat exchange element according to this modified example is manufactured. In the first and second steps, the fiber melting layers 35 formed on a part of the surface (upper and lower surfaces) of the rib 34z serve as the bonding surfaces with the heat transfer plate 13, respectively. Thereby, the bonding strength between the rib 34 and the heat transfer plate 13 can be increased.

[0078] As described above, according to the manufacturing method of the heat exchange element according to this modified example, the following effects can be enjoyed.

[0079] (7) In the manufacturing method of the heat exchange element according to this modified example, in the fourth step, a fiber melting layer 35 is formed on a part of the surface of the rib 34c to form the rib 34z, and the rib 34z is adjusted as the rib 34. Thereby, since the rigidity at a part of the surface of the rib 34 is improved by the fiber melting layer 35, after the heat exchange element is manufactured, it becomes difficult for the rib 34 to absorb water (or moisture) and expand, and further breakage of the adhesive 41 that bonds the rib 34 and the heat transfer plate 13 can be suppressed.

[0080] (8) The heat exchange element manufactured according to this modified example is composed of ribs 34z on the surface of which a fiber melting layer 35 in which the fiber member 40 is melted and fixed is formed. Thereby, since the rigidity on the surface of the rib 34 is improved, it becomes difficult for the rib 34z to deform even when an external force or a change in temperature and humidity acts on the heat exchange element. That is, compared with the case where there is no fiber melting layer 35 on the surface of the rib 34z, the air passage of the heat exchange element is less likely to deform. Thereby, the bias of the air flowing through the heat exchange element is eliminated, and the air can be blown at a uniform wind speed in the air passage of the heat exchange element, so that the heat exchange efficiency of the heat exchange element can be maintained high. In other words, it is possible to obtain a heat exchange element capable of suppressing a decrease in heat exchange efficiency accompanying a change in the shape of the air passage.

[0081] (9) By configuring a heat exchange ventilation device using the heat exchange element manufactured according to this modified example, it is possible to realize a heat exchange ventilation device capable of suppressing a decrease in heat exchange efficiency accompanying a change in the shape of the air passage of the heat exchange element.

[0082] The above has been described based on the embodiments of the present invention. These embodiments are examples, and it is understood by those skilled in the art that various modifications are possible for each of these constituent elements or combinations of each processing process, and such modifications are also within the scope of the present invention.

[0083] In the manufacturing method of the heat exchange element 6 according to the first embodiment, the inner rib 14a and the outer rib 14b having the same dimensional width are used, but it is not limited thereto. For example, the width of the outer rib 14b may be made wider than the width of the inner rib 14a. Thereby, the outer rib 14b of the subsequent layer can be more reliably joined to the heat transfer plate 13 of the previous layer, and the adhesive strength can be enhanced.

[0084] Also, in the manufacturing method of the heat exchange element 6 according to the first embodiment, in the first step and the second step, when fixing the rib 14 and the heat transfer plate 13, the adhesive 41 may be impregnated into each minute gap of the fiber member 40 constituting the rib 14. Thereby, the rib 14 (particularly the outer rib 14b) and the heat transfer plate 13 can be more firmly fixed to each other.

[0085] Also, in the heat exchange element 26 and the manufacturing method of the heat exchange element 26 according to the second embodiment, the heat transfer plate 23 of the previous layer that covers the heat transfer plate of the subsequent layer is formed to extend up to the position of the heat transfer plate 23 on the upper surface of the outer rib 24b of the subsequent layer, but it is not limited thereto. For example, the heat transfer plate 23 of the previous layer may be formed to cover a part of the surface on the outer side (the outer peripheral side surface of the heat exchange element 6) of the outer rib 24b of the subsequent layer. Also in this case, the adhesive strength can be enhanced at the covered portion.

[0086] Regarding the terms used above, the heat transfer plates 13 and 23 according to the present embodiment and the modified example correspond to the "partition member" in the claims, and the ribs 14 (inner rib 14a, outer rib 14b) and ribs 24 (inner rib 24a, outer rib 24b) correspond to the "spacing maintaining member" in the claims. Also, the heat exchange element pieces 15, 15a, 15b and the heat exchange element pieces 25, 25a, 25b correspond to the "unit constituent member" in the claims, and the adhesives 41 and 41a correspond to the "adhesive member" in the claims. Further, the heat exchange elements 6 and 26 correspond to the "heat exchange element" in the claims. Also, the exhaust air passage 16 corresponds to the "exhaust air passage" in the claims, and the supply air passage 17 corresponds to the "supply air passage" in the claims. Additionally, the rib 34a corresponds to the "first spacing maintaining member" in the claims, the rib 34 corresponds to the "second spacing maintaining member" in the claims, and the rib 34z corresponds to the "third spacing maintaining member" in the claims. Also, the fiber melting layer 35 corresponds to the "melting layer" in the claims.

Industrial Applicability

[0087] The method for manufacturing a heat exchange element according to the present invention can manufacture a heat exchange element in which peeling between a rib and a heat transfer plate hardly occurs and leakage of an air current from an air passage hardly occurs, and thus is useful as a method for manufacturing a heat exchange element used in a heat exchange ventilation device or the like.

Explanation of Reference Numerals

[0088] 1 House 2 Heat exchange ventilation device 3 Exhaust air flow 4 Supply air flow 5 Main body case 6 Heat exchange element 6a Laminate 7 Exhaust fan 8 Inner air inlet 9 Exhaust port 10 Supply air fan 11 Outer air inlet 12 Supply air port 13 Heat transfer plate 13a Edge 13b Edge 13c Edge 13d Edge 14 Rib 14a Inner rib 14b Outer rib 15 Heat exchange element piece 15a Heat exchange element piece of the front layer 15b Heat exchange element piece of the rear layer 16 Exhaust air duct 17 Air supply duct 23 Heat transfer plate 24 Rib 24a Inner rib 24b Outer rib 25 Heat exchange element piece 25a Heat exchange element piece of the front layer 25b Heat exchange element piece of the rear layer 26 Heat exchange element 26a Laminate 34 Rib 34a Rib 34b Rib 34c Rib 34z Rib 35 Fiber melting layer 40 Fiber member 41 Adhesive 41a Adhesive 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 Portion serving as P contact Portion serving as P1 contact Portion serving as P2 contact

Claims

1. A method for manufacturing a heat exchange element, comprising laminating unit components each including a heat-conductive partition member and a plurality of spacing members provided on one surface of the partition member, to alternately form an exhaust air passage and an intake air passage layer by layer, and allowing an exhaust flow passing through the exhaust air passage and an intake flow passing through the intake air passage to exchange heat through the partition member, the method comprising: a first step of forming a plurality of the spacing members on one surface of the partition member to form the unit component; a second step of alternately laminating the unit components layer by layer and joining them to form a laminate; a third step of forming the exhaust air passage and the intake air passage having a predetermined interval in the lamination direction by compressing the laminate in the lamination direction; characterized by comprising: In the second step, when laminating the unit components layer by layer, an adhesive member is formed on the partition member of the unit component of the previous layer, and the spacing member of the unit component of the subsequent layer is joined thereto. After joining the spacing member of the unit component of the subsequent layer, an outer extension portion of the partition member of the previous layer is joined to the partition member of the subsequent layer. A method for manufacturing a heat exchange element.

2. The method for manufacturing a heat exchange element according to claim 1, wherein in the second step, the adhesive member is formed at a portion that becomes a contact point between the partition member of the previous layer and the spacing member of the unit component of the subsequent layer, and the spacing member of the unit component of the subsequent layer is joined to the contact point.

3. characterized by having a fourth step of adjusting the spacing member before the first step, In the fourth step, a predetermined first spacing member is swelled by absorbing water and then dried to form a second spacing member, and the second spacing member is adjusted as the spacing member. The method for manufacturing a heat exchange element according to claim 1 or 2.

4. In the fourth step, a molten layer is formed on a part of the surface of the second spacing member to form a third spacing member, and the third spacing member is adjusted as the spacing member. The method for manufacturing a heat exchange element according to claim 3.

Images