Heat Exchange Element

Abstract

To provide a heat exchange element that can improve heat exchange efficiency.SOLUTION: In a heat exchange element 6, exhaust air passages 18 and supply air passages 19 are constituted alternately one by one by stacking heat exchange element pieces 17 each comprising a heat transfer plate 13 having a heat transfer property, and a plurality of ribs 14 provided on one surface of the heat transfer plate 13, and heat is exchanged between an exhaust air flow 3 passing through each of the exhaust air passages 18, and a supply air flow 4 passing through each of the supply air passages 19, via the heat transfer plate 13. The one surface of the heat transfer plate 13 is provided with a first net-like member 15a sandwiched between the ribs 14 and the heat transfer plate 13, and extending to the adjacent ribs 14 on the one surface. The first net-like member 15a is formed so as to have a first gap 16a between itself and the one surface of the heat transfer plate 13, between the ribs 14 adjacent to each other.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a heat exchange element used in cold regions and the like, which exchanges heat between an exhaust flow that exhausts indoor air to the outside and an intake flow that supplies outdoor air to the inside of a room. [Background technology]

[0002] Conventionally, a known structure of the heat exchange element used in this type of heat exchange ventilation device is that described in Patent Document 1, for example, in order to ensure reliability by improving sealing performance (a sealing function that prevents air flowing through the air flow path from leaking out).

[0003] FIG. 13 is an exploded perspective view showing the structure of a conventional heat exchange element 101. As shown in FIG.

[0004] As shown in FIG. 13 , the heat exchange element 101 is constructed by stacking multiple heat exchange element units 102, each consisting of a thermally conductive functional paper 103 and ribs 104. On one side of the functional paper 103, multiple ribs 104 are provided parallel to each other at predetermined intervals. Each rib 104 is made of paper strings 105 and a hot-melt resin 106 that bonds the paper strings 105 to the functional paper 103. These ribs 104 create gaps between pairs of adjacently stacked functional papers 103, forming air flow paths 107. The heat exchange element 101 is formed so that multiple gaps are stacked, and the air flow directions of the air flow paths 107 in adjacent gaps are configured to be perpendicular to each other. This allows intake airflow and exhaust airflow to alternate through the air flow paths 107 for each functional paper 103, and heat exchange occurs between the intake airflow and the exhaust airflow. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-248390 Summary of the Invention [Problem to be solved by the invention]

[0006] In such a conventional heat exchange element 101, ribs 104 are formed by wrapping paper strings 105 with a substantially circular cross section in hot melt resin 106, and the formed ribs 104 are bonded to functional papers 103 with the hot melt resin 106, thereby maintaining the spacing between the functional papers 103. However, in recent years, there has been a growing emphasis on improving the energy efficiency of air conditioners, and there is a demand for further improvements in the heat exchange efficiency of this configuration.

[0007] SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art, and has an object to provide a heat exchange element capable of improving heat exchange efficiency. [Means for solving the problem]

[0008] To achieve this object, the heat exchange element of the present invention is configured by stacking unit components each including a heat-conductive partition member and a plurality of spacing members provided on one side of the partition member to form an exhaust air passage and an intake air passage alternately in one layer, and heat is exchanged between the exhaust air flow passing through the exhaust air passage and the intake air flow passing through the intake air passage via the partition member. On one side of the partition member, a first mesh member is provided, which is sandwiched between the spacing members and the partition member and extends to the adjacent spacing member on one side, and the first mesh member is sandwiched between the adjacent spacing members and one side of the partition member. first With gaps The first gap is formed so that the distance between the first mesh member and one surface of the partition member becomes shorter as it approaches the spacing member, and is cylindrical along the flow direction of the exhaust airflow in the exhaust airflow duct or the flow direction of the intake airflow in the intake airflow duct, through which the exhaust airflow or the intake airflow flows, This will achieve the intended purpose. [Effects of the Invention]

[0009] According to the present invention, it is possible to obtain a heat exchange element that can improve heat exchange efficiency. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing an example of installation of a heat exchange type ventilation device according to a first embodiment of the present invention in a house. [Figure 2]FIG. 2 is a schematic diagram showing the structure of a heat exchange type ventilation device. [Figure 3] FIG. 3 is an exploded perspective view showing the structure of a heat exchange element used in a heat exchange type ventilation device. [Figure 4] FIG. 4 is a partially enlarged view showing the structure of the heat exchange element pieces that constitute the heat exchange element. [Figure 5] FIG. 5 is a cross-sectional view illustrating a method for manufacturing a heat exchange element. [Figure 6] FIG. 6 is a cross-sectional view illustrating a method for manufacturing a heat exchange element. [Figure 7] FIG. 7 is a cross-sectional view illustrating a method for manufacturing a heat exchange element. [Figure 8] FIG. 8 is a partial cross-sectional view of the heat exchange element pieces in a stacked state that constitute the heat exchange element. [Figure 9] FIG. 9 is a partial cross-sectional view of stacked heat exchange element pieces that constitute the heat exchange element according to the first modification. [Figure 10] FIG. 10 is a cross-sectional view illustrating a method for manufacturing a heat exchange element according to the first modification. [Figure 11] FIG. 11 is a cross-sectional view illustrating a method for manufacturing a heat exchange element according to the first modification. [Figure 12] FIG. 12 is a partially enlarged view of the heat exchange element pieces in a stacked state that constitute the heat exchange element according to the second modification. [Figure 13] FIG. 13 is a perspective view of a conventional heat exchange element. DETAILED DESCRIPTION OF THE INVENTION

[0011] The heat exchange element according to the present invention is configured by stacking unit components each including a heat-conductive partition member and a plurality of spacing members provided on one surface of the partition member to form an exhaust air passage and an intake air passage alternately in one layer, and heat is exchanged between the exhaust air flowing through the exhaust air passage and the intake air flowing through the intake air passage via the partition member. One surface of the partition member is provided with a first mesh member sandwiched between the spacing members and the partition member and extending to an adjacent spacing member on one surface, and the first mesh member is formed with a first gap between itself and one surface of the partition member between the adjacent spacing members.

[0012] According to this configuration, a first mesh member is disposed in the exhaust air passage (or intake air passage) on one side of the partition member in the direction of the exhaust airflow (or intake airflow) flow, with a first gap formed. As a result, when the exhaust airflow (or intake airflow) passing through the exhaust air passage (or intake air passage) flows along the surface of the partition member in the exhaust air passage (or intake air passage), the exhaust airflow (or intake airflow) is obstructed by the mesh portion of the first mesh member or passes through the holes in the first mesh member, becoming turbulent and causing the air in the exhaust airflow (or intake airflow) to mix. This results in an improved heat transfer coefficient within the heat exchange element. Therefore, the heat exchange efficiency of the heat exchange element can be improved compared to conventional heat exchange elements that do not have a first mesh member sandwiched between the spacing member and the partition member. In other words, a heat exchange element capable of improving heat exchange efficiency can be obtained.

[0013] Furthermore, in the heat exchange element according to the present invention, a second mesh member is provided on the other surface of the partition member, sandwiched between spacing members of other stacked unit components and extending to an adjacent spacing member on the other surface. The second mesh member may be formed between adjacent spacing members, with a second gap between the second mesh member and the other surface of the partition member. In this manner, the second mesh member is disposed with a second gap on the other surface of the partition member in the exhaust airflow duct (or intake airflow duct), in the direction of the exhaust flow (or intake airflow). As a result, when the exhaust flow (or intake airflow) passing through the exhaust airflow duct (or intake airflow duct) flows along the surface of the partition member in the exhaust airflow duct (or intake airflow duct), the exhaust flow (or intake airflow) is obstructed by the mesh portion of the second mesh member or passes through the holes in the second mesh member, causing turbulence and mixing of the air in the exhaust flow (or intake airflow). As a result, the exhaust air flow (or intake air flow) is more easily disturbed, and the heat exchange efficiency of the heat exchange element can be further improved.

[0014] In the heat exchange element according to the present invention, the first mesh member is preferably formed over the entire surface of one of the partition members, thereby enabling the exhaust airflow (or the intake airflow) flowing through the exhaust airflow path (or the intake airflow path) to be disturbed over the entire surface of the partition member, thereby improving the heat exchange efficiency of the heat exchange element evenly across the surface.

[0015] In the heat exchange element according to the present invention, the second mesh member is preferably formed over the entire other surface of the partition member, thereby disturbing the exhaust airflow (or intake airflow) flowing through the exhaust airflow path (or intake airflow path) over the entire other surface of the partition member, thereby improving the heat exchange efficiency of the heat exchange element evenly across the surface.

[0016] In the heat exchange element according to the present invention, the first mesh member and the second mesh member are preferably both fixed by an adhesive member provided between the partition member and the spacing member. This allows the first mesh member and the second mesh member to be reliably fixed on the respective partition members, and allows for consistent gaps to be formed between the first gap and the second gap and the partition member. As a result, the first mesh member and the second mesh member can stably disrupt the exhaust flow (or intake flow) flowing through the exhaust air passage (or intake air passage).

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] (Embodiment 1) First, an overview of a heat exchanger-type ventilation device 2 equipped with a heat exchange element 6 according to a first embodiment of the present invention will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram showing an example of installation of a heat exchanger-type ventilation device 2 equipped with a heat exchange element 6 according to a first embodiment of the present invention in a residence (house 1). Figure 2 is a schematic diagram showing the structure of the heat exchanger-type ventilation device 2.

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

[0020] As shown in FIG. 1, exhaust air flow 3 is discharged from the interior of house 1 to the exterior via heat exchange ventilation device 2, as indicated by the black arrows in FIG. 1. Exhaust air flow 3 is the flow of air exhausted from the interior of house 1 to the exterior. In addition, intake air flow 4 is the flow of air taken in from the exterior of house 1 to the interior via heat exchange ventilation device 2, as indicated by the white arrows in FIG. 1. In other words, intake air flow 4 is the flow of air taken in from the exterior of house 1 to the interior. For example, in winter in Japan, exhaust air flow 3 may be between 20°C and 25°C, while intake air flow 4 may reach below freezing. The heat exchange ventilation device 2 not only ventilates the room, but also transfers heat from exhaust air flow 3 to intake air flow 4 during ventilation, thereby suppressing the release of unnecessary heat. In other words, the heat discharged to the exterior via exhaust air flow 3 can be taken into the room via intake air flow 4.

[0021] As shown in FIG. 2 , the heat exchanger 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 intake fan 10, an outside air port 11, and an intake port 12. The main body case 5 is the outer frame of the heat exchanger ventilation device 2. The inside air port 8, the exhaust port 9, the outside air port 11, and the intake port 12 are formed on the outer periphery of the main body case 5. The inside air port 8 is an intake port through which the exhaust flow 3 is drawn from indoors into the heat exchanger ventilation device 2. The exhaust port 9 is an outlet port through which the exhaust flow 3 is discharged from the heat exchanger ventilation device 2 to outdoors. The outside air port 11 is an intake port through which the intake air flow 4 is drawn from outdoors into the heat exchanger ventilation device 2. The intake port 12 is an outlet port through which the intake air flow 4 is discharged from the heat exchanger ventilation device 2 to indoors.

[0022] A heat exchange element 6, an exhaust fan 7, and an intake fan 10 are mounted inside the main body case 5. The heat exchange element 6 is a component for exchanging heat between the exhaust air flow 3 and the intake air flow 4. The exhaust fan 7 is a blower that draws in the exhaust air flow 3 from indoors through an indoor air port 8 and discharges it outdoors through an exhaust port 9. The intake fan 10 is a blower that draws in the intake air flow 4 from outdoors through an outdoor air port 11 and discharges it indoors through an intake port 12. When the exhaust fan 7 is driven, the exhaust air flow 3 is drawn in from indoors through the indoor air port 8, passes through the heat exchange element 6 and the exhaust fan 7, and is discharged outdoors through the exhaust port 9. When the intake fan 10 is driven, the intake air flow 4 is drawn in from outdoors through the outdoor air port 11, passes through the heat exchange element 6 and the intake fan 10, and is supplied indoors through the intake port 12.

[0023] Next, the heat exchange element 6 will be described with reference to Figures 3 and 4. Figure 3 is an exploded perspective view showing the structure of the heat exchange element 6 used in the heat exchange type ventilation device 2. Figure 4 is a partially enlarged view showing the structure of a heat exchange element piece 17 that constitutes the heat exchange element 6.

[0024] As shown in FIG. 3 , the heat exchange element 6 is composed of multiple heat exchange element pieces 17. Each heat exchange element piece 17 has multiple ribs 14 bonded to one side of a substantially square heat transfer plate 13, sandwiching a first mesh member 15a. A first gap 16a is defined between the first mesh member 15a and the bonded heat transfer plate 13. The heat exchange element 6 is configured such that multiple heat exchange element pieces 17 are stacked with the orientation of adjacent heat exchange element pieces 17 alternating so that the longitudinal directions of the ribs 14 of adjacent heat exchange element pieces 17 are perpendicular to each other in the stacking direction (vertical direction). This allows exhaust airflow paths 18 through which the exhaust airflow 3 flows and intake airflow paths 19 through which the intake airflow 4 flows to be alternately provided in the stacking direction of the heat exchange element pieces 17. Therefore, the exhaust airflow 3 and the intake airflow 4 flow perpendicular to each other alternately in the stacking direction of the heat exchange element pieces 17, enabling heat exchange between the exhaust airflow 3 and the intake airflow 4 via the heat transfer plate 13 in the heat exchange element 6.

[0025] The heat exchange element piece 17 is one unit constituting the heat exchange element 6. As described above, the heat exchange element piece 17 is configured by bonding a plurality of ribs 14 to the underside of one surface of a substantially square heat transfer plate 13 via a first mesh member 15a. The ribs 14 below the heat transfer plate 13 are formed so that their longitudinal direction runs from one end edge of the heat transfer plate 13 to the opposing end edge. Each of the plurality of ribs 14 is formed linearly. The plurality of ribs 14 are arranged in parallel at predetermined intervals below the surface of the heat transfer plate 13. Specifically, as shown in FIG. 3 , of two heat exchange element pieces 17 adjacent to each other in the vertical direction, one of the heat exchange element pieces 17 is configured by bonding a rib 14 to the underside of one surface of the heat transfer plate 13 so that its longitudinal direction runs from the end edge 13a of the heat transfer plate 13 toward the opposing end edge 13c. In addition, the rib 14 is glued under one surface of the heat transfer plate 13 constituting the other heat exchange element piece 17 so that the longitudinal direction of the rib 14 runs from the end edge 13b (the end edge perpendicular to the end edge 13a) of the heat transfer plate 13 constituting the one heat exchange element piece 17 toward the opposing end edge 13d.

[0026] The heat transfer plate 13 is a plate-shaped member for exchanging heat when the exhaust air flow 3 and the intake air flow 4 flow across the heat transfer plate 13. The heat transfer plate 13 can be a thin sheet with heat conductivity and gas impermeability. The heat transfer plate 13 is formed from cellulose fiber-based heat transfer paper, which has heat conductivity, moisture permeability, and moisture absorption properties, and can provide a heat exchange element 6 that exchanges heat and moisture. However, the material of the heat transfer plate 13 is not limited to these. For example, a metal sheet such as aluminum or iron, or a resin sheet such as polyethylene or polypropylene can be used as the heat transfer plate 13 to provide a heat exchange element 6 that exchanges only heat. Furthermore, a moisture-permeable resin film based on polyurethane, polyethylene terephthalate, or the like, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber can be used to provide a heat exchange element 6 that exchanges both heat and moisture.

[0027] First mesh member 15a is a member that generates turbulence in exhaust airflow 3 flowing through exhaust airflow passage 18 and intake airflow 4 flowing through intake airflow passage 19 as they flow through the respective airflow passages. First mesh member 15a is disposed across the entire area below one surface of heat transfer plate 13 and is sandwiched between heat transfer plate 13 and rib 14, with first gaps 16a formed between adjacent ribs 14. As shown in FIG. 4 , first mesh member 15a is sandwiched between heat transfer plate 13 and rib 14, and can also be said to extend from the sandwiched portion to the adjacent rib 14 so as to create first gaps 16a.

[0028] The thickness of the first mesh member 15a is thinner than the thickness of the ribs 14 described below, i.e., the height of the exhaust air passages 18 and the intake air passages 19 in the stacking direction. In this embodiment, the thickness of the first mesh member 15a is thinner than the thickness of the heat transfer plate 13. The shape of the first mesh member 15a may be a mesh that allows air to pass through in the thickness direction, and may have holes (perforations) formed in a grid pattern of predetermined dimensions or randomly in a planar manner through which air passes. The first mesh member 15a may be, for example, a plain woven mesh made of a metal such as aluminum or iron, or a nonwoven fabric or nanofiber made of a resin such as polyethylene or polypropylene.

[0029] The first gap 16a is a gap formed between the heat transfer plate 13 and the first mesh member 15a fixed to the heat transfer plate 13, between adjacent ribs 14. The first gap 16a is formed in a cylindrical shape on the lower surface of the heat transfer plate 13. In other words, the first gap 16a extends along the exhaust airflow path 18 through which the exhaust flow 3 passes or the intake airflow path 19 through which the intake airflow 4 passes. The first gap 16a is generated when the first mesh member 15a stretches during the manufacturing process of the heat exchange element 6.

[0030] The ribs 14 are provided between a pair of opposing edges of the heat transfer plate 13, and are formed so as to extend from one edge to the other edge. The ribs 14 are members for forming gaps, i.e., exhaust air passages 18 or intake air passages 19, for ventilating the exhaust air flow 3 or intake air flow 4 between the heat transfer plates 13 when the heat transfer plates 13 are stacked.

[0031] Each of the plurality of ribs 14 has a substantially circular cross section as shown in Fig. 4. The ribs 14 and the heat transfer plate 13 can be fixed to each other, for example, by using an adhesive 41 with a first mesh member 15a interposed therebetween.

[0032] The rib 14 is made up of a plurality of fiber members 40, and is fixed to the heat transfer plate 13 via an adhesive 41 with the first mesh member 15a sandwiched therebetween.

[0033] The material of the fiber member 40 only needs to have a certain strength, and can be, for example, a resin material such as polypropylene, polyethylene, polyethylene terephthalate, ABS, or polyamide, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber, cotton, silk, or hemp.

[0034] The adhesive 41 is preferably a chemical that exerts adhesive force on the rib 14. For example, if a paper string is used for the rib 14, a vinyl acetate resin-based adhesive that has good adhesion to hydrophilic paper can be used. Also, depending on the manufacturing method, a curing method such as moisture curing, pressure curing, or UV curing can be selected. However, this is not limited to these chemicals, and any known adhesive or bonding method can be used depending on the material of the rib 14, and there will be no difference in the effect.

[0035] Although the cross-sectional shape of the rib 14 is substantially circular, it may be triangular, rectangular, trapezoidal, or hexagonal.

[0036] Next, a method for manufacturing the heat exchange element 6 will be described with reference to Figs. 5 to 7. Fig. 5 is a cross-sectional view illustrating a method for manufacturing the heat exchange element pieces 17 that constitute the heat exchange element 6. Fig. 5(a) is a cross-sectional view illustrating a step of applying adhesive 41 to the portions P of the heat transfer plate 13 that will become contact points of the ribs 14. Fig. 5(b) is a cross-sectional view illustrating a step of sandwiching the first mesh members 15a between the heat transfer plate 13 and the ribs 14 and aligning the positions of the ribs 14 to be bonded to the adhesive 41 applied to the heat transfer plate 13. Fig. 5(c) is a cross-sectional view illustrating a step of bonding the ribs 14 and the first mesh members 15a to the adhesive 41 applied to the heat transfer plate 13.

[0037] 6 is a cross-sectional view illustrating a method for manufacturing the heat exchange element 6. Fig. 6(a) is a cross-sectional view illustrating a step of applying adhesive 41 to a portion P of the heat transfer plate 13 of the front heat exchange element piece 17a that will be a contact point of the rib 14. Fig. 6(b) is a cross-sectional view illustrating a step of aligning the position of the rib 14 of the rear heat exchange element piece 17b that will be bonded to the adhesive 41 applied to the heat transfer plate 13. Fig. 6(c) is a cross-sectional view illustrating a step of bonding the rib 14 to the adhesive 41 applied to the heat transfer plate 13.

[0038] 7A and 7B are cross-sectional views illustrating a method for manufacturing the heat exchange element 6. Fig. 7A is a cross-sectional view illustrating a step of compressing a laminate 6a, in which heat exchange element pieces 17 are stacked, in the stacking direction to form air passages with predetermined intervals in the stacking direction. Fig. 7B is a cross-sectional view illustrating the heat exchange element 6 produced by compressing the laminate 6a in the stacking direction.

[0039] The manufacturing method of the heat exchange element 6 includes a first step of forming a plurality of ribs 14 on one side of the heat transfer plate 13 to form heat exchange element pieces 17, a second step of forming a laminate 6a by alternately stacking the heat exchange element pieces 17 one layer at a time, and a third step of compressing the laminate 6a in the stacking direction to form exhaust air passages 18 and intake air passages 19 spaced apart by a predetermined distance in the stacking direction.

[0040] Each step (first step to third step) will be specifically explained below.

[0041] First, in the first step, as shown in FIG. 5(a), adhesive 41 is applied to contact points P of multiple ribs 14 arranged at predetermined intervals on one surface of a heat transfer plate 13. Next, as shown in FIG. 5(b), the ribs 14 are aligned to a predetermined position by sandwiching a first mesh member 15a between the ribs 14 and the heat transfer plate 13. Both ends of the ribs 14 are tensioned to prevent the ribs 14 from loosening. Meanwhile, both ends of the first mesh member 15a are relaxed so that a first gap 16a is formed between the first mesh member 15a and the heat transfer plate 13 to which the adhesive 41 is applied. Then, as shown in FIG. 5(c), the ribs 14 and the first mesh member 15a are fixed to the heat transfer plate 13 to form the heat exchange element piece 17. At this time, the adhesive 41 adheres to the ribs 14 and also adheres to the heat transfer plate 13 by penetrating into the holes in the first mesh member 15a. Furthermore, because the first mesh member 15a is fixed to the heat transfer plate 13 at the ribs 14 in a loose state, a first gap 16a is formed between the first mesh member 15a and the heat transfer plate 13 between adjacent ribs 14. Thereafter, a predetermined pressure is applied to the bonding surface from the stacking direction until the adhesive 41 hardens to prevent air from entering the gaps of the adhesive 41. In this way, in the first step, the steps shown in Figure 5(a) to (c) are repeated to form a plurality of heat exchange element pieces 17. Note that the number of pieces is the number required to manufacture the heat exchange element 6.

[0042] Next, in the second step, as shown in FIG. 6(a), adhesive 41 is applied to the contact points P of the plurality of ribs 14 arranged at predetermined intervals on the surface of the heat exchanger plate 13 of the front-layer heat exchanger element piece 17a to which the ribs 14 are not attached (the surface opposite one surface of the heat exchanger plate 13). Next, as shown in FIG. 6(b), the ribs 14 of the rear-layer heat exchanger element piece 17b are aligned in predetermined positions. At this time, the rear-layer heat exchanger element piece 17b is orthogonal to the front-layer heat exchanger element piece 17a. To prevent wrinkles from forming in the front-layer heat exchanger element piece 17a, both sides of the front-layer heat exchanger element piece 17a that are orthogonal to the ribs 14 are pulled. Then, as shown in FIG. 6(c), the ribs 14 are fixed to the heat exchanger plate 13 of the front-layer heat exchanger element piece 17a. 5(c), a predetermined pressure is applied to the adhesive surface from the stacking direction (vertical direction) until the adhesive 41 hardens, preventing air from entering the gaps in the adhesive 41. This process is then repeated layer by layer, alternating between layers, to form the stack 6a in which all the heat exchange element pieces 17 are stacked.

[0043] Finally, in the third step, as shown in Fig. 7(a), the heat exchange element pieces 17 are pressed against the stack 6a of the heat exchange element pieces 17 formed in the above steps in the stacking direction (vertical direction) of the heat exchange element pieces 17. To prevent misalignment of the bonding positions of the heat transfer plate 13 and the first mesh member 15a, which are joined with the adhesive 41, and the ribs 14, barriers are provided around the periphery of the stack 6a, and the stack is pressed against the ribs 14 evenly in the stacking direction. Then, as shown in Fig. 7(b), the upper and lower heat exchange element pieces 17 are fixed together to form the heat exchange element 6. This forms the heat exchange element 6, in which air passages (exhaust air passage 18, intake air passage 19) are formed at predetermined intervals (equivalent to the height of the ribs 14) in the stacking direction of the heat exchange element pieces 17.

[0044] Next, a mechanism by which turbulence is generated in the exhaust air flow 3 or the intake air flow 4 in the heat exchange element 6 of this embodiment will be described with reference to Fig. 8. Fig. 8 is a partial cross-sectional view of the stacked heat exchange element pieces 17 that make up the heat exchange element 6.

[0045] 8, in a heat exchange element piece 17 constituting a heat exchange element 6, the heat transfer plate 13 and the ribs 14 are bonded together with a first mesh member 15a sandwiched therebetween. In this case, in an exhaust air passage 18 (or an intake air passage 19) formed by the heat transfer plate 13 and the ribs 14, the first mesh member 15a is disposed between adjacent ribs 14, and a first gap 16a is formed between the first mesh member 15a and the heat transfer plate 13.

[0046] When the exhaust airflow 3 flows through the exhaust airflow duct 18, it becomes turbulent as it hits the mesh portion of the first mesh member 15a inserted along the surface of the heat transfer plate 13 or passes through the holes in the first mesh member 15a, creating a turbulent flow that agitates the air inside. For example, the exhaust airflow 3 that enters the first gap 16a passes through the holes in the first mesh member 15a and flows out the other side. The reverse flow also occurs. This mixes the air inside, improving the heat transfer coefficient. In other words, the heat exchange efficiency of the heat exchange element 6 can be improved.

[0047] 8, the exhaust airflow 3 is used as the airflow passing through the heat exchange element 6, but the intake airflow 4 also has a similar configuration in which the first mesh members 15a and the first gaps 16a are arranged, and therefore a similar turbulence is generated to agitate the air inside. As a result, the same effects as those of the exhaust airflow 3 can be obtained.

[0048] As described above, the heat exchange element 6 according to the first embodiment can provide the following effects.

[0049] (1) The heat exchange element 6 is formed by stacking heat exchange element pieces 17 each including a heat transfer plate 13 having thermal conductivity and a plurality of ribs 14 provided on one surface of the heat transfer plate 13, to form exhaust air passages 18 and intake air passages 19 alternately, and heat is exchanged between the exhaust air flow 3 flowing through the exhaust air passage 18 and the intake air flow 4 flowing through the intake air passage 19 via the heat transfer plate 13. One surface of the heat transfer plate 13 is provided with a first mesh member 15a that is sandwiched between the rib 14 and the heat transfer plate 13 and extends to an adjacent rib 14 on one surface, and the first mesh member 15a is formed with a first gap 16a between itself and one surface of the heat transfer plate 13 at the adjacent ribs 14.

[0050] According to this configuration, in the exhaust airflow duct 18 (or the intake airflow duct 19), the first mesh member 15a is arranged with the first gap 16a on one side of the heat transfer plate 13, which is in the direction of the flow of the exhaust airflow 3 (or the intake airflow 4). As a result, when the exhaust airflow 3 (or the intake airflow 4) flowing through the exhaust airflow duct 18 (or the intake airflow 19) flows along the surface of the heat transfer plate 13 in the exhaust airflow duct 18 (or the intake airflow 19), the exhaust airflow 3 (or the intake airflow 4) is obstructed by the mesh portion of the first mesh member 15a of the heat transfer plate 13 or passes through the holes in the first mesh member 15a, becoming turbulent and causing the air in the exhaust airflow 3 (or the intake airflow 4) to mix. As a result, the heat transfer coefficient in the heat exchange element 6 is improved. Therefore, the heat exchange efficiency of the heat exchange element 6 can be improved compared to a conventional heat exchange element in which the first mesh member 15a is not sandwiched between the ribs 14 and the heat transfer plate 13. In other words, the heat exchange element 6 can be made to have improved heat exchange efficiency.

[0051] (2) In the heat exchange element 6, the first mesh member 15a is formed over the entire one surface of the heat transfer plate 13. This allows the exhaust air flow 3 (or the intake air flow 4) flowing through the exhaust air passage 18 (or the intake air passage 19) to be disturbed over the entire one surface of the heat transfer plate 13, thereby improving the heat exchange efficiency of the heat exchange element 6 evenly across the surface.

[0052] (3) In the heat exchange element 6, the first mesh member 15a is fixed between the heat transfer plate 13 and the ribs 14 by the adhesive 41 provided between them. This fixes the position of the mesh member 15, maintaining a constant gap 16 between it and the heat transfer plate 13. This ensures that the first mesh member 15a is reliably fixed on the heat transfer plate 13, and a constant gap can be formed between the first gap 16a and the heat transfer plate 13. As a result, the first mesh member 15a can stably disrupt the exhaust airflow 3 (or the intake airflow 4) flowing through the exhaust airflow path 18 (or the intake airflow path 19).

[0053] (Variation 1) Next, a heat exchange element 6x according to Modification 1 will be described with reference to Fig. 9. Fig. 9 is a partial cross-sectional view of stacked heat exchange element pieces 17x that constitute the heat exchange element 6x according to Modification 1.

[0054] The heat exchange element 6x according to the first modification example differs from the heat exchange element 6 according to the first embodiment in that it further includes a second mesh member 15b sandwiched between another heat transfer plate 13 and the rib 14 stacked on the heat exchange element piece 17x and extending to the adjacent rib 14, and a second gap 16b formed between the another heat transfer plate 13 and the second mesh member 15b. The rest of the configuration of the heat exchange element 6x is the same as that of the heat exchange element 6 according to the first embodiment. Below, the details already explained in the first embodiment will be omitted as appropriate, and differences from the first embodiment will be mainly explained. Note that the "surface of the another heat transfer plate 13" has the same meaning as the "other surface" of the heat transfer plate 13, which is the surface opposite to one surface of the heat transfer plate 13. Therefore, hereinafter, "the surface of the another heat transfer plate 13" will be referred to as "the other surface of the heat transfer plate 13."

[0055] 8, a heat exchange element 6x according to Modification 1 has a second mesh member 15b and a second gap 16b formed on the other surface of the heat transfer plate 13. That is, in the heat exchange element 6x, a first mesh member 15a and a second mesh member 15b are formed above and below each other in one exhaust air passage 18 (or one supply air passage 19), and first gaps 16a and second gaps 16b are formed, respectively.

[0056] Similar to the first mesh member 15a, the second mesh member 15b generates turbulence in the exhaust airflow 3 flowing through the exhaust airflow passage 18 and the intake airflow 4 flowing through the intake airflow passage 19 as they flow through the respective airflow passages. The second mesh member 15b is disposed over the entire surface of the other surface of the heat transfer plate 13 and is sandwiched between the heat transfer plate 13 and the ribs 14, with second gaps 16b formed between adjacent ribs 14. As shown in FIG. 9 , the second mesh member 15b can also be said to be sandwiched between another stacked heat transfer plate 13 and rib 14, and to extend from the sandwiched portion to the adjacent rib 14 so as to create the second gaps 16b.

[0057] The shape, thickness, and material of the second mesh member 15b are the same as those of the first mesh member 15a, and therefore, a description thereof will be omitted.

[0058] The second gap 16b is a gap formed between adjacent ribs 14, between another stacked heat transfer plate 13 and the second mesh member 15b fixed to this heat transfer plate 13. The second gap 16b is formed in a cylindrical shape on the upper surface of the heat transfer plate 13. In other words, like the first gap 16a, the second gap 16b extends along the exhaust airflow path 18 through which the exhaust airflow 3 flows or the intake airflow path 19 through which the intake airflow 4 flows. The second gap 16b is generated when the second mesh member 15b stretches during the manufacturing process of the heat exchange element 6.

[0059] Next, a manufacturing method of the heat exchange element 6x will be described with reference to Fig. 10 and Fig. 11. Fig. 10 is a cross-sectional view illustrating the manufacturing method of the heat exchange element 6x. Fig. 10(a) is a cross-sectional view illustrating a process of applying adhesive 41 to a contact portion P of the heat transfer plate 13 of the front-layer heat exchange element piece 17a with the ribs 14. Fig. 10(b) is a cross-sectional view illustrating a process of sandwiching the second mesh member 15b between the heat transfer plate 13 of the front-layer heat exchange element piece 17a and the rib 14 of the rear-layer heat exchange element piece 17b, and aligning the position of the rib 14 of the rear-layer heat exchange element piece 17b to be bonded to the adhesive 41 applied to the heat transfer plate 13. Fig. 10(c) is a cross-sectional view illustrating a process of bonding the rib 14 and the second mesh member 15b with the adhesive 41 applied to the heat transfer plate 13.

[0060] 11A and 11B are cross-sectional views illustrating a method for manufacturing a heat exchange element 6x. Fig. 11A shows a cross-sectional view illustrating a step of compressing a stack 6b, which is made by stacking heat exchange element pieces 17x, in the stacking direction to form air passages with a predetermined gap therebetween. Fig. 11B shows a cross-sectional view illustrating a heat exchange element 6x produced by compressing the stack 6b in the stacking direction.

[0061] The manufacturing method of the heat exchange element 6x includes a first step of forming a plurality of ribs 14 on one side of the heat transfer plate 13 to form a heat exchange element piece 17x, a second step of forming a laminate 6b by alternately stacking the heat exchange element pieces 17x one layer at a time, and a third step of compressing the laminate 6b in the stacking direction to form an exhaust air passage 18 and an intake air passage 19 with a predetermined gap in the stacking direction.

[0062] Each step (first step to third step) will be specifically explained below.

[0063] First, in the first step, as described above in the first embodiment, the steps shown in Fig. 5(a) to (c) are repeated to form a plurality of heat exchange element pieces 17x, the number of which is the number required to manufacture the heat exchange element 6x.

[0064] In the second step, as shown in FIG. 10(a), adhesive 41 is applied to the contact points P of the plurality of ribs 14 arranged at predetermined intervals on the surface of the heat exchange element piece 17a of the front layer to which the ribs 14 of the heat transfer plate 13 are not attached (the surface opposite to one surface of the heat transfer plate 13). Next, as shown in FIG. 10(b), the second mesh member 15b is sandwiched between the heat exchange element piece 17a of the front layer and the heat transfer plate 13 of the front layer, and the ribs 14 of the heat exchange element piece 17b of the rear layer are aligned to predetermined positions. At this time, the rear layer heat exchange element piece 17b is orthogonal to the front layer heat exchange element piece 17a. To prevent wrinkles in the front layer heat exchange element piece 17a, both sides of the front layer heat exchange element piece 17a that are orthogonal to the ribs 14 are tensioned. Meanwhile, both ends of the second mesh member 15b are left loose so as to create a second gap 16b between the second mesh member 15b and the heat transfer plate 13 to which the adhesive 41 is bonded. Then, as shown in FIG. 10(c), the ribs 14 and the second mesh member 15b are fixed to the heat transfer plate 13 of the heat exchange element piece 17a in the previous layer. At this time, the adhesive 41 adheres to the ribs 14 and also penetrates into the holes in the second mesh member 15b, adhering to the heat transfer plate 13. Furthermore, because the second mesh member 15b is fixed to the heat transfer plate 13 at the ribs 14 in a loose state, second gaps 16b are formed between the second mesh member 15b and the heat transfer plate 13 between adjacent ribs 14. Thereafter, a predetermined pressure is applied to the bonding surface from the stacking direction (vertical direction) until the adhesive 41 hardens to prevent air from entering the gaps in the adhesive 41. This process is then repeated layer by layer, alternating between layers, to form a stack 6b in which all the heat exchange element pieces 17x are stacked.

[0065] Finally, in the third step, as shown in FIG. 11(a), the heat exchange element pieces 17x formed in the above step are pressed against the stack 6b in the stacking direction (vertical direction) of the heat exchange element pieces 17x. To prevent misalignment of the bonding positions of the heat transfer plate 13, the second mesh member 15b, and the ribs 14, which are joined with the adhesive 41, barriers are provided around the periphery of the stack 6b, and the stack is pressed evenly in the stacking direction. Then, as shown in FIG. 11(b), the upper and lower heat exchange element pieces 17x are fixed together to form the heat exchange element 6x. This results in the formation of a heat exchange element 6x in which air passages (exhaust air passage 18, intake air passage 19) are formed at predetermined intervals (equivalent to the height of the ribs 14) in the stacking direction of the heat exchange element pieces 17x.

[0066] Next, with reference to FIG. 9, a mechanism by which turbulence occurs in the exhaust air flow 3 or the intake air flow 4 will be described.

[0067] 9, in a heat exchange element piece 17x, a heat transfer plate 13 and a rib 14 are bonded together with a first mesh member 15a sandwiched therebetween, and another stacked heat transfer plate 13 and a rib 14 are bonded together with a second mesh member 15b sandwiched therebetween. In this case, in an exhaust air passage 18 (or an intake air passage 19) formed by the heat transfer plate 13 and the rib 14, the first mesh member 15a and the second mesh member 15b are arranged between adjacent ribs 14, and a first gap 16a and a second gap 16b are formed between the first mesh member 15a and the heat transfer plate 13 and between the second mesh member 15b and another heat transfer plate 13, respectively.

[0068] As the exhaust airflow 3 flows through the exhaust duct 18, as described in the first embodiment, the exhaust airflow 3 becomes turbulent when it collides with the mesh portion of the first mesh member 15a inserted along the surface of the heat transfer plate 13 or passes through the holes in the first mesh member 15a, thereby becoming turbulent and stirring the air inside. Furthermore, the exhaust airflow 3 becomes turbulent when it collides with the mesh portion of the second mesh member 15b inserted along the surface of the heat transfer plate 13 or passes through the holes in the first mesh member 15a, thereby becoming turbulent and stirring the air inside. For example, the exhaust airflow 3 that enters the second gap 16b passes through the mesh portion of the second mesh member 15b and flows out the other side. The reverse flow can also occur.

[0069] In the first modification, these allow the air inside to mix together, improving the heat transfer coefficient, that is, improving the heat exchange efficiency of the heat exchange element 6x.

[0070] In Figure 9, the exhaust air flow 3 is used as the air flow passing through the heat exchange element 6x, but the intake air flow 4 also has a configuration in which the first mesh member 15a and the second mesh member 15b, and the first gap 16a and the second gap 16b are similarly arranged, and therefore has the same effect.

[0071] As described above, the heat exchange element 6x according to the first modification can provide the following effects.

[0072] (4) In the heat exchange element 6x, a second mesh member 15b is provided on the other surface of the heat transfer plate 13. The second mesh member 15b is sandwiched between the ribs 14 of another stacked heat exchange element piece 17x and the heat transfer plate 13, and extends to the adjacent rib 14 on the other surface. The second mesh member 15b is formed between the adjacent ribs 14 and the other surface of the heat transfer plate 13, with a second gap 16b formed between the second mesh member 15b and the other surface of the heat transfer plate 13.

[0073] According to this configuration, in the exhaust airflow duct 18 (or the intake airflow duct 19), the second mesh member 15b is disposed with the second gap 16b on the other surface of the heat transfer plate 13, which is the direction in which the exhaust airflow 3 (or the intake airflow 4) flows. As a result, when the exhaust airflow 3 (or the intake airflow 4) flowing through the exhaust airflow duct 18 (or the intake airflow 19) flows along the surface of the heat transfer plate 13 in the exhaust airflow duct 18 (or the intake airflow 19), the exhaust airflow 3 (or the intake airflow 4) is obstructed by the mesh portion of the second mesh member 15b or passes through holes in the second mesh member 15b, becoming turbulent and causing the air in the exhaust airflow 3 (or the intake airflow 4) to mix. As a result, the exhaust airflow 3 (or the intake airflow) is more likely to be turbulent, further improving the heat exchange efficiency of the heat exchange element 6x.

[0074] (5) In the heat exchange element 6x, the second mesh member 15b is formed over the entire other surface of the heat transfer plate 13. This allows the exhaust air flow 3 (or the intake air flow 4) flowing through the exhaust air passage 18 (or the intake air passage 19) to be disturbed over the entire other surface of the heat transfer plate 13, thereby improving the heat exchange efficiency of the heat exchange element 6x evenly across the surface.

[0075] (6) In the heat exchange element 6x, the first mesh member 15a and the second mesh member 15b are both fixed by adhesive 41 provided between the heat transfer plate 13 and the rib 14. This ensures that the first mesh member 15a and the second mesh member 15b are securely fixed on the respective heat transfer plates 13, and allows for consistent gaps to be formed between the first gaps 16a and the second gaps 16b and the respective heat transfer plates 13. As a result, the first mesh member 15a and the second mesh member 15b can stably disrupt the exhaust airflow 3 (or the intake airflow 4) flowing through the exhaust airflow duct 18 (or the intake airflow duct 19).

[0076] (Variation 2) Next, a heat exchange element 6z according to Modification 2 will be described with reference to Fig. 12. Fig. 9 is a partial cross-sectional view of stacked heat exchange element pieces 17z that constitute a heat exchange element 6x according to Modification 1.

[0077] The heat exchange element 6z according to Modification 2 differs from Modification 1 in that, instead of the ribs 14 of the heat exchange element 6x, ribs 14z having irregularities formed on the surface of the heat exchange element 6z in the stacking direction are used. The rest of the configuration of the heat exchange element 6z is the same as that of the heat exchange element 6x according to Modification 1. Below, the details already explained in Embodiment 1 will be omitted as appropriate, and differences from Modification 1 will be mainly explained.

[0078] 12, in a heat exchange element 6z according to Modification 2, in a heat exchange element piece 17z, a heat transfer plate 13 and a rib 14z are bonded with a first mesh member 15c sandwiched therebetween, and another stacked heat transfer plate 13 and a rib 14z are bonded with a second mesh member 15d sandwiched therebetween. In this case, in an exhaust airflow path 18 (or an intake airflow path 19) formed by the heat transfer plate 13 and the rib 14z, the first mesh member 15c and the second mesh member 15d are arranged between adjacent ribs 14z, and a first gap 16c and a second gap 16d are formed between the first mesh member 15c and the heat transfer plate 13 and between the second mesh member 15d and the other heat transfer plate 13, respectively.

[0079] The ribs 14z are configured with an uneven shape on the surface portion that joins to the heat transfer plate 13. The ribs 14z are fixed to each heat transfer plate 13 with adhesive 41, with the protrusions of the ribs 14z fitting into and penetrating the holes of the first mesh member 15c and the second mesh member 15d. In other words, the ribs 14z are formed to hook onto the first mesh member 15c and the second mesh member 15d, respectively, and therefore can more firmly fix the first mesh member 15c and the second mesh member 15d.

[0080] The first mesh member 15c is a member corresponding to the first mesh member 15a. That is, the first mesh member 15c is disposed over the entire surface of one side of the heat transfer plate 13 and is sandwiched between the heat transfer plate 13 and the ribs 14z, with first gaps 16c formed between adjacent ribs 14z. The position (height) of the first mesh member 15c is determined by the convex portions of the ribs 14z that penetrate the first mesh member 15c, and therefore, unlike the first mesh member 15a, the first mesh member 15c is disposed at a fixed distance from the heat transfer plate 13.

[0081] The first gaps 16c are gaps formed at regular intervals between the heat transfer plate 13 and the first mesh member 15c fixed to the heat transfer plate 13, between the adjacent ribs 14z. The first gaps 16c are formed in a cylindrical shape on the lower surface of the heat transfer plate 13.

[0082] The second mesh member 15d is a member corresponding to the second mesh member 15b. That is, the second mesh member 15d is disposed over the entire surface of the other surface of the other heat transfer plate 13, is sandwiched between the other heat transfer plate 13 and the ribs 14z, and is formed with second gaps 16d between adjacent ribs 14z. The position (height) of the second mesh member 15d is determined by the convex portions of the ribs 14z that penetrate the second mesh member 15d, and therefore, unlike the second mesh member 15b, the second mesh member 15d is disposed at a fixed distance from the other heat transfer plate 13.

[0083] The second gaps 16d are gaps formed at regular intervals between adjacent ribs 14z and between another heat transfer plate 13 and a second mesh member 15d fixed to the heat transfer plate 13. Similar to the first gaps 16c, the second gaps 16d are formed in a cylindrical shape on the lower surface of the other heat transfer plate 13.

[0084] The heat exchange element 6z is manufactured by using the ribs 14z instead of the ribs 14 in each of the first to third steps of the manufacturing method for the heat exchange element 6x described above, and therefore detailed description thereof will be omitted.

[0085] In the heat exchange element 6z according to the second modification, when the exhaust airflow 3 flows through the exhaust airflow duct 18, as described in the first modification, the exhaust airflow 3 becomes turbulent when it strikes the mesh portion of the first mesh member 15c inserted along the surface of the heat transfer plate 13 or passes through the holes in the first mesh member 15c, resulting in turbulence and agitating the air inside. Furthermore, the exhaust airflow 3 becomes turbulent when it strikes the mesh portion of the second mesh member 15d inserted along the surface of another heat transfer plate 13 or passes through the holes in the second mesh member 15d, resulting in turbulence and agitating the air inside. The same applies to the intake airflow 4 flowing through the exhaust airflow duct 18. This causes the air inside to mix, improving the heat transfer coefficient. In other words, the heat exchange efficiency of the heat exchange element 6z can be improved.

[0086] As described above, the heat exchange element 6z according to the second modification can provide the following effects.

[0087] (7) In the heat exchange element 6z, a first mesh member 15c is provided on one surface of the heat transfer plate 13, sandwiched between the rib 14z and the heat transfer plate 13, and extending to an adjacent rib 14z on one surface, and the first mesh member 15c is formed so that a first gap 16c is formed between the first mesh member 15c and one surface of the heat transfer plate 13 at adjacent ribs 14z. In the heat exchange element 6z, a second mesh member 15d is provided on the other surface of another heat transfer plate 13 in the stacked heat exchange element pieces 17z, sandwiched between the rib 14z and the other heat transfer plate 13, and extending to an adjacent rib 14z on the other surface, and the second mesh member 15b is formed so that a second gap 16d is formed between the second mesh member 15b and the other surface of the other heat transfer plate 13 between adjacent ribs 14z.

[0088] According to this configuration, in exhaust air passage 18 (or intake air passage 19), first mesh member 15c and second mesh member 15d are respectively arranged with first gaps 16c and second gaps 16d on the surface of each heat transfer plate 13 in the direction in which exhaust air passage 3 (or intake air passage 4) flows. As a result, when exhaust air passage 3 (or intake air passage 4) flowing through exhaust air passage 18 (or intake air passage 19) flows along the surface of heat transfer plate 13 in exhaust air passage 18 (or intake air passage 19), exhaust air passage 3 (or intake air passage 4) is obstructed by the mesh portions of first mesh member 15c or second mesh member 15d or passes through holes in first mesh member 15c or second mesh member 15d, becoming turbulent and causing the air in exhaust air passage 3 (or intake air passage 4) to mix. As a result, the exhaust air flow 3 (or the intake air flow) is more easily disturbed, and the heat exchange efficiency of the heat exchange element 6z can be further improved.

[0089] With regard to the terminology used above, the heat transfer plate 13 according to the present embodiment and each of the modified examples corresponds to the "partition member" in the claims, and the ribs 14, 14x, and 14z correspond to the "spacing member" in the claims. The heat exchange element pieces 17, 17x, and 17z correspond to the "unit components" in the claims, and the adhesive 41 corresponds to the "adhesive member" in the claims. The heat exchange element 6, 6x, and 6z correspond to the "heat exchange element" in the claims. The exhaust air duct 18 corresponds to the "exhaust air duct" in the claims, and the intake air duct 19 corresponds to the "intake air duct" in the claims. The first mesh member 15a and the first mesh member 15c correspond to the "first mesh member" in the claims, and the second mesh member 15b and the second mesh member 15d correspond to the "second mesh member" in the claims. The first gap 16a and the first gap 16c correspond to the "first gap" in the claims, and the second gap 16b and the second gap 16d correspond to the "second gap" in the claims. [Industrial Applicability]

[0090] As described above, the heat exchange element of this embodiment generates turbulence in the air flow (exhaust flow or intake flow) flowing through the air duct (exhaust air duct or intake air duct), thereby improving the heat transfer coefficient within the air duct and improving the heat exchange efficiency, and is useful as a heat exchange element for use in heat exchange type ventilation devices, etc. [Explanation of symbols]

[0091] 1 house 2. Heat exchange ventilation system 3 Exhaust flow 4 Intake air flow 5 Main unit case 6 Heat exchange element 6a Laminate 6b Laminate 6x heat exchange elements 6z Heat exchange element 7. Exhaust fan 8 Internal air vent 9 Exhaust port 10. Intake fan 11. Outside air vent 12 Air supply port 13 Heat transfer plate 13a Edge 13b Edge 13c Edge 13d edge 14 Ribs 14x Ribs 14z Ribs 15a First mesh member 15b Second mesh member 15c First mesh member 15d Second mesh member 16a First gap 16b Second gap 16c First gap 16d Second gap 17 Heat exchange element piece 17a Front layer heat exchange element piece 17b Rear layer heat exchange element piece 17x Heat Exchanger Pieces 17z Heat exchange element piece 18 Exhaust air duct 19 Air supply duct 40 Fiber materials 41 Adhesive 101 Heat exchange element 102 Heat exchange element alone 103 Functional Paper 104 Ribs 105 Paper String 106 Hot melt resin 107 Air flow path P Contact point

Claims

1. A heat exchange element in which exhaust air passages and intake air passages are alternately formed one layer at a time by stacking unit components each including a heat-conductive partition member and a plurality of spacing members provided on one surface of the partition member, and an exhaust air flow passing through the exhaust air passage and an intake air flow passing through the intake air passage exchange heat via the partition member, A first mesh member is provided on the one surface of the partition member, the first mesh member being sandwiched between the spacing member and the partition member and extending to the spacing member adjacent to the one surface, The first mesh member has a first gap between the first mesh member and the one surface of the partition member between the adjacent spacing members, The first gap is a distance between the first mesh member and the one surface of the partition member is formed to be shorter as the first mesh member is closer to the spacing member, A heat exchange element characterized in that it is cylindrical along the flow direction of the exhaust flow in the exhaust air duct or the flow direction of the intake air flow in the intake air duct, and the exhaust flow or the intake air flow flows through its interior.

2. A heat exchange element as described in Claim 1, characterized in that the first mesh member is formed over the entire one surface of the partition member.

3. A second mesh member is provided on the other surface of the partition member, the second mesh member being sandwiched between the spacing member and the partition member in another stacked unit component and extending to the adjacent spacing member on the other surface; The second mesh member has a second gap between the second mesh member and the other surface of the partition member between the adjacent spacing members, The second gap is The distance between the second mesh member and the other surface of the partition member is formed to be shorter as the second mesh member is closer to the spacing member, The exhaust airflow passage is cylindrical along the direction of flow of the exhaust airflow in the exhaust airflow passage or along the direction of flow of the intake airflow in the intake airflow passage, and the exhaust airflow or the intake airflow flows through the inside of the exhaust airflow passage.

3. The heat exchange element according to claim 1 or 2.

4. The heat exchange element according to claim 3 , wherein the second mesh member is formed over the entire other surface of the partition member.

5. The heat exchange element according to claim 3 or 4, characterized in that the first mesh member and the second mesh member are both fixed by an adhesive member provided between the partition member and the spacing member.

Images