WO2020045003A1 - Heat exchange element and heat exchange type ventilator using same - Google Patents

Abstract

This heat exchange element (106) is configured by laminating heat exchange element pieces (115), each including a heat transfer plate (113) having heat transfer properties and a plurality of ribs (114) provided in parallel on one side of the heat transfer plate (113), such that layers of exhaust air ducts (116) and layers of intake air ducts (117) are alternately formed. The heat exchange element (106) allows for heat exchange between exhaust air currents (103) flowing through the exhaust air ducts (116) and intake air currents (104) flowing through the intake air ducts (117) via the heat transfer plates (113). The ribs (114) are formed from a plurality of fibrous members having hygroscopic properties and include protection layers (130) covering the end faces of the ribs (114).

Description

Heat exchange element and heat exchange ventilator using the same

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

Conventionally, as a structure of a heat exchange element used in this type of heat exchange type ventilation device, in order to secure reliability by improving sealability (a seal function for preventing air flowing through an air flow path from leaking outside), For example, the one described in Patent Document 1 is known.

FIG. 7 is an exploded perspective view showing the structure of the conventional heat exchange element 11.

As shown in FIG. 7, the heat exchange element 11 is formed by laminating a large number of heat exchange elements 12 each composed of functional paper 13 having heat conductivity and ribs 14. On one surface of the functional paper 13, a plurality of paper cords 15 and a plurality of ribs 14 made of a hot melt resin 16 for bonding the paper cords 15 to the functional paper 13 are provided in parallel at predetermined intervals. Due to the ribs 14, a gap is formed between a pair of adjacent functional papers 13 to form an air flow path 17. The heat exchange element 11 is formed so that a plurality of gaps are stacked, and the air blowing directions of the respective air passages 17 in adjacent gaps are configured to be orthogonal to each other. As a result, the supply air flow and the exhaust air flow alternately through the air flow path 17 for each functional paper 13, and heat exchange is performed between the air supply flow and the exhaust air flow.

JP-A-11-248390

In such a conventional heat exchange element, in addition to the fiber member (for example, the above-described paper cord) constituting the spacing member (for example, the above-mentioned rib) being exposed on the outer peripheral surface of the heat exchange element, The end surface of the holding member and the end surface of the partition member (for example, the functional paper described above) are aligned. In such a configuration, on the outer peripheral surface of the heat exchange element, the fiber member is exposed at the longitudinal end surface of the spacing member. Therefore, in the case of an external force such as an accidental push of the hand on the surface of the heat exchange element during maintenance or the like, the conventional heat exchange element frays the fiber member exposed on the end face of the spacing member, thereby causing heat. There is a problem that the strength of the exchange element is reduced.

Therefore, the present disclosure uses a heat exchange element with increased strength, which suppresses the occurrence of fraying of the fiber member exposed on the end face of the spacing member due to the occurrence of external force on the outer peripheral surface of the heat exchange element, and has increased strength. It is an object to provide a heat exchange type ventilation device.

In order to achieve this object, a heat exchange element according to the present disclosure includes a unit member including a partition member having heat conductivity, and a plurality of spacing members provided in parallel on one surface of the partition member. And a heat exchange element in which an exhaust airflow and an air supply airflow are alternately formed one layer at a time, and an exhaust flow flowing through the exhaust airflow and a supply airflow flowing through the air supply airflow exchange heat via a partition member. The spacing member includes a plurality of fiber members having a hygroscopic property, and includes a protection member that covers an end surface of the spacing member. This achieves the intended purpose.

According to the present disclosure, it is possible to obtain a high-strength heat exchange element in which fibers at the end face of the spacing member are less likely to fray, and a heat exchange ventilator using the same.

FIG. 1 is a schematic diagram illustrating an installation state of a heat exchange ventilator according to Embodiment 1 of the present disclosure in a house. FIG. 2 is a schematic diagram showing a structure of the heat exchange type ventilation device. FIG. 3 is an exploded perspective view showing the structure of the heat exchange element. FIG. 4 is a partially enlarged view showing the structure of the rib. FIG. 5 is a partially enlarged view showing the structure of the heat exchange element piece. FIG. 6 is an exploded perspective view showing the structure of the heat exchange element according to Embodiment 2 of the present disclosure. FIG. 7 is an exploded perspective view showing the structure of a conventional heat exchange element. FIG. 8 is a schematic diagram illustrating an installation state of a heat exchange ventilator according to a third embodiment of the present disclosure in a house. FIG. 9 is a schematic diagram showing a structure of the heat exchange type ventilation device. FIG. 10 is an exploded perspective view showing the structure of the heat exchange element. FIG. 11 is a partial sectional view showing the structure of the rib. FIG. 12 is a partial sectional view showing another example of the structure of the rib. FIG. 13 is an exploded perspective view showing the structure of a conventional heat exchange element. FIG. 14 is a schematic diagram illustrating an installation state of a heat exchange ventilator according to Embodiment 4 of the present disclosure in a house. FIG. 15 is a schematic diagram showing the structure of the heat exchange type ventilation device. FIG. 16 is an exploded perspective view showing the structure of the heat exchange element. FIG. 17A is a partial perspective view showing a part of a portion where two pieces of heat exchange element pieces before heat melting constituting the same heat exchange element are stacked. FIG. 17B is a partial perspective view showing a part of a portion where two heat exchange element pieces after heat fusion that constitute the same heat exchange element are stacked. FIG. 18A is a partial perspective view in which a part of a part where two heat exchange element pieces before heat melting constituting a heat exchange element according to Embodiment 5 of the present disclosure are stacked is partially extracted and shown. FIG. 18B is a partial perspective view showing a part of a portion where two heat exchange element pieces after heat fusion that constitute the same heat exchange element are laminated. FIG. 19 is an exploded perspective view showing the structure of a conventional heat exchange element. FIG. 20 is a schematic diagram illustrating an installation state of a heat exchange ventilator according to Embodiment 6 of the present disclosure in a house. FIG. 21 is a schematic diagram showing the structure of the heat exchange type ventilation device. FIG. 22 is an exploded perspective view showing the structure of the heat exchange element. FIG. 23 is a partially enlarged view showing the structure of the rib. FIG. 24 is a partially enlarged view showing the structure of the heat exchange element piece. FIG. 25 is a partially enlarged view showing the structure of the heat exchange element piece according to Embodiment 7 of the present disclosure. FIG. 26 is an exploded perspective view showing the structure of a conventional heat exchange element. FIG. 27 is a schematic diagram illustrating an installation state of a heat exchange ventilator according to the eighth embodiment of the present disclosure in a house. FIG. 28 is a schematic diagram showing the structure of the heat exchange type ventilation device. FIG. 29 is an exploded perspective view showing the structure of a heat exchange element used in the heat exchange ventilator. FIG. 30 is a partial cross-sectional view showing a structure of a rib constituting the heat exchange element. FIG. 31 is a view illustrating a method for manufacturing the heat exchange element. FIG. 32 is an exploded perspective view showing the structure of a conventional heat exchange element.

The heat exchange element according to the present disclosure is configured such that a unit member including a partition member having heat conductivity and a plurality of spacing members provided in parallel on one surface of the partition member is stacked, and an exhaust air path and an air supply The heat exchange element is configured such that the passages are alternately formed one layer at a time, and the exhaust flow flowing through the exhaust air passage and the supply air flow flowing through the supply air passage exchange heat through a partition member. It is constituted by a plurality of fibrous members having properties, and is provided with a protection member for covering the end face of the spacing member.

Thereby, it is possible to suppress the fiber on the end face of the spacing member from being exposed on the outer surface of the heat exchange element. Further, since the end faces of the plurality of fiber members constituting the spacing member are covered with the protection member, the strength of the end faces of the spacing member can be improved. Therefore, when an external force is generated on the outer surface of the heat exchange element, it is possible to obtain a heat exchange element having an increased strength with which the fiber member on the end face of the spacing member is not easily frayed.

The protection member may be provided so as to protrude outside the end surface of the partition member. Thereby, in a stage before the external force generated on the outer surface of the heat exchange element is transmitted to each of the spacing member and the partition member, the external force can be dispersed by the deformation of the protection member. Thereby, the external force transmitted to the spacing member and the partition member can be reduced, so that when the external force is generated on the outer surface of the heat exchange element, it is possible to obtain a heat exchange element having an increased strength with which the partition member is not easily broken. .

保護 Also, the protection member may be configured to further cover the end surface of the partition member. With this configuration, when an external force is generated on the outer surface of the heat exchange element, the partition is more partitioned than the configuration in which the protection member is provided only on the end surface of the heat exchange element, as compared with the configuration in which the protection member is provided only on the end surface of the spacing member. It is possible to obtain a heat exchange element having an increased strength that does not easily cause breakage of the member.

熱 Further, the heat exchange ventilator according to the present disclosure is configured by mounting the above heat exchange element.

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

(Embodiment 1)
First, with reference to FIG. 1 and FIG. 2, an outline of a heat exchange type ventilator 102 including a heat exchange element 106 according to Embodiment 1 of the present disclosure will be described. FIG. 1 is a schematic diagram illustrating an installation example of the heat exchange type ventilation device 102 including the heat exchange element 106. FIG. 2 is a schematic diagram showing the structure of the heat exchange type ventilation device 102.

In FIG. 1, a heat exchange type ventilator 102 is installed inside a house 101. The heat exchange ventilator 102 is a device that ventilates while exchanging heat between indoor air and outdoor air.

As shown in FIG. 1, the exhaust stream 103 is discharged outside through the heat exchange ventilator 102 as indicated by the black arrow. The exhaust flow 103 is a flow of air discharged from indoors to outdoors. The supply air flow 104 is taken into the room through the heat exchange type ventilation device 102 as indicated by the white arrow. The air supply flow 104 is a flow of air taken from indoors to outdoors. For example, in winter in Japan, the exhaust stream 103 may be at 20 to 25 ° C., while the air supply stream 104 may be below freezing. The heat exchange type ventilator 102 performs ventilation and transmits heat of the exhaust flow 103 to the air supply flow 104 during the ventilation, thereby suppressing unnecessary heat release.

As shown in FIG. 2, the heat exchange ventilator 102 includes a main body case 105, a heat exchange element 106, an exhaust fan 107, an inside air port 108, an exhaust port 109, an air supply fan 110, an outside air port 111, and an air supply port 112. ing. The main body case 105 is an outer frame of the heat exchange type ventilator 102. On the outer periphery of the main body case 105, an inside air port 108, an exhaust port 109, an outside air port 111, and an air supply port 112 are formed. The inside air port 108 is a suction port that sucks the exhaust gas flow 103 into the heat exchange ventilator 102. The exhaust port 109 is an outlet that discharges the exhaust gas 103 from the heat exchange ventilator 102 to the outside. The outside air port 111 is a suction port that sucks the supply air flow 104 into the heat exchange ventilator 102. The air supply port 112 is a discharge port that discharges the air supply flow 104 from the heat exchange ventilator 102 into the room.

熱 A heat exchange element 106, an exhaust fan 107, and an air supply fan 110 are mounted inside the main body case 105. The heat exchange element 106 is a member for performing heat exchange between the exhaust gas flow 103 and the supply air flow 104. The exhaust fan 107 is a blower for sucking the exhaust flow 103 from the inside air port 108 and discharging the exhaust stream 103 from the exhaust port 109. The air supply fan 110 is a blower that sucks the air supply flow 104 from the outside air port 111 and discharges the air from the air supply port 112. By driving the exhaust fan 107, the exhaust flow 103 sucked from the inside air port 108 passes through the heat exchange element 106 and the exhaust fan 107, and is discharged from the exhaust port 109 to the outside. Further, the air supply flow 104 sucked from the outside air opening 111 by driving the air supply fan 110 is supplied from the air supply opening 112 to the room through the heat exchange element 106 and the air supply fan 110.

Next, the heat exchange element 106 will be described with reference to FIGS. FIG. 3 is an exploded perspective view showing the structure of the heat exchange element 106. FIG. 4 is a partial cross-sectional view showing the structure of the rib 114. FIG. 5 is a partially enlarged view showing the structure of the heat exchange element piece 115.

熱 As shown in FIG. 3, the heat exchange element 106 is composed of a plurality of heat exchange element pieces 115. Each heat exchange element piece 115 has a plurality of ribs 114 bonded to one surface of a substantially square heat transfer plate 113. The heat exchange element 106 is formed by laminating a plurality of heat exchange element pieces 115 with the ribs 114 being alternately changed one by one in a stepwise manner so that the ribs 114 are orthogonal to each other. With such a configuration, the exhaust air passage 116 through which the exhaust air flow 103 flows and the air supply air passage 117 through which the air supply flow 104 flows are formed, and the exhaust air flow 103 and the air supply flow 104 alternately and orthogonally flow. To allow heat exchange between them.

The heat exchange element piece 115 is one unit constituting the heat exchange element 106. As described above, the heat exchange element piece 115 is formed by bonding the plurality of ribs 114 on one surface of the substantially square heat transfer plate 113. The rib 114 on the heat transfer plate 113 is formed such that its longitudinal direction is directed from one end of the heat transfer plate 113 to the other end opposite thereto. The respective ribs 114 are arranged in parallel at a predetermined interval. Specifically, as shown in FIG. 3, a rib is provided on one surface of the heat transfer plate 113 that constitutes one of the two heat exchange element pieces 115 vertically adjacent to each other. The heat transfer plate 113 is formed by bonding such that the longitudinal direction of the heat transfer plate 114 is directed from the end side 113a of the heat transfer plate 113 to the opposite end side 113c. Further, on one surface of the heat transfer plate 113 constituting the other heat exchange element piece 115, the longitudinal direction of the rib 114 is located at one end 113b of the heat transfer plate 113 (perpendicular to the end 113a). Are formed so as to adhere to the opposite end side 113d. Further, in the heat exchange element piece 115, after a predetermined number of ribs 114 are formed on the heat transfer plate 113, a protective layer 130 covering an end face of each rib 114 is formed. The protective layer 130 will be described later.

The protective layer 130 may be formed by laminating the required number of heat exchange element pieces 115 to form the heat exchange element 106, and then forming the protective layer 130 on the end surface of the rib 114. Absent.

(4) The heat transfer plate 113 is a plate-shaped member for performing heat exchange when the exhaust flow 103 and the supply air flow 104 flow across the heat transfer plate 113. The heat transfer plate 113 is formed of a heat transfer paper based on cellulose fibers, and has heat conductivity, moisture permeability, and moisture absorption. However, the material of the heat transfer plate 113 is not limited to this. For the heat transfer plate 113, for example, a moisture-permeable resin film based on polyurethane or polyethylene terephthalate, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber can be used. The heat transfer plate 113 is a thin sheet having heat conductivity, and may be a sheet having a property of not allowing gas to permeate.

The rib 114 is provided between a pair of opposing sides of the heat transfer plate 113 and is formed so as to extend from one side to the other side. The rib 114 has a substantially cylindrical shape for forming a gap for allowing the exhaust flow 103 or the supply air flow 104 to flow between the heat transfer plates 113 when the heat transfer plates 113 are stacked, that is, for forming the exhaust air passage 116 or the supply air passage 117. It is a member of.

The rib 114 has a substantially circular cross section as shown in FIG. As the cross-sectional shape of the rib 114, a member having a shape such as a rectangular shape or a hexagon other than the substantially circular shape may be used. The rib 114 is composed of a plurality of fiber members 140, and is fixed to the heat transfer plate 113 via an adhesive member 141. Further, the rib 114 is configured by impregnating the adhesive member 141 into each minute gap between the fiber members 140.

Each of the fiber members 140 is a fiber member having a substantially circular cross section and extending in the same direction as the rib 114, as shown in FIG. As a material of the fiber member 140, a material having a hygroscopic property and a certain strength is sufficient, for example, a resin member such as polypropylene, polyethylene, polyethylene terephthalate, or polyamide, or a cellulose fiber, a ceramic fiber, and a glass fiber as a base. Paper materials, such as cotton, silk, and hemp, can be used.

Note that the rib 114 and the heat transfer plate 113 are fixed by impregnating the adhesive member 141 into a plurality of fiber members 140 constituting the rib 114 and then disposing the rib 114 on one surface of the heat transfer plate 113. , May be performed by thermal welding of the adhesive member 141. Alternatively, the ribs 114 are arranged on one surface of the heat transfer plate 113 and the adhesive member 141 is applied, and the impregnation of the plurality of fiber members 140 constituting the ribs 114 and the heat welding of the heat transfer plate 113 are performed. It may be performed simultaneously.

(5) The protective layer 130 is formed so as to cover the end surface of the rib 114, as shown in FIG. The protective layer 130 is formed so as to prevent the plurality of fiber members 140 constituting the rib 114 shown in FIG. 4 from being exposed on the end face and to join the plurality of fiber members 140 together. The protective layer 130 has a convex shape from the end surface of the rib 114, and protrudes from the edge of the heat transfer plate 113 (the edge 113 a in FIG. 5) to the outside of the heat exchange element piece 115 (heat exchange element 106). Has become. Although not shown in FIG. 5, the configuration of the protective layer 130 is the same at the side 113c facing the side 113a, and other heat transfer plates 113 adjacent to the heat transfer plate 113 shown in FIG. The same applies to the end sides (end sides 113c and 113d).

The protective layer 130 is preferably made of a chemical agent that exerts an adhesive force on the rib 114. For example, when a paper string is used for the rib 114, a vinyl acetate resin-based adhesive having good adhesiveness to hydrophilic paper may be used. . Further, a curing method such as moisture curing, pressure curing, and UV (ultraviolet) curing can be selected according to the manufacturing method. However, known adhesives and bonding methods can be used depending on the material of the rib 114 without being limited to these agents, and there is no difference in the effects.

According to the heat exchange element 106 according to the first embodiment, since the end surface of the rib 114 is covered with the protective layer 130 in such a configuration, the fiber member 140 is formed on the outer surface of the heat exchange element 106. Can be prevented from being exposed. Thus, for example, when transporting the heat exchange element 106 during maintenance, the hand of the transporter contacts the outer surface of the heat exchange element 106, and when an external force occurs, the hand directly contacts the fiber member 140. It can be suppressed by the protective layer 130. In addition, since the plurality of fiber members 140 constituting the rib 114 are joined to each other by the protective layer 130, the adhesive force of the fiber member 140 is increased, so that the strength of the end surface of the rib 114 can be improved. Therefore, when an external force is generated on the outer surface of the heat exchange element 106, it is possible to obtain a heat exchange element having higher strength in which the fiber member 140 on the end face of the rib 114 is less likely to be frayed.

Further, the protective layer 130 has a convex shape from the end face of the rib 114, and projects from the end sides 113a, 113b, 113c, 113d of the heat transfer plate 113 toward the outside of the heat exchange element 106 (see FIG. 3). ). Thereby, for example, when transporting the heat exchange element 106 during maintenance, the hand of the transporter contacts the outer surface of the heat exchange element 106, and when an external force occurs, the rib 114 and the heat transfer plate 113 At the stage before the external force is transmitted to each, the external force is dispersed by the deformation of the protective layer 130, and the external force transmitted to the rib 114 and the heat transfer plate 113 can be reduced. Therefore, when an external force is generated on the outer surface of the heat exchange element 106, in addition to the fraying of the fiber member 140 on the end face of the rib 114, a heat exchange element having higher strength in which the heat transfer plate 113 is hardly torn is obtained. Can be.

(Embodiment 2)
Next, a heat exchange element 106a according to Embodiment 2 of the present disclosure will be described with reference to FIG. The heat exchange element 106 according to the first embodiment has a configuration in which the protective layer 130 covers only the end surface of the rib 114. On the other hand, in the heat exchange element 106 a according to the second embodiment, in addition to the end face of the rib 114, the end face of the rib 114 on the side faces (end sides 113 a, 113 b, 113 c, 113 d) of the heat transfer plate 113. The lower part is also covered. The other configuration of the heat exchange element 106a is the same as that of the first embodiment, and the description thereof is omitted. Hereinafter, the same components are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

FIG. 6 is an exploded perspective view showing the structure of the heat exchange element 106a according to Embodiment 2 of the present disclosure. As shown in FIG. 6, the heat exchange element piece 115 a according to the second embodiment has a predetermined number of ribs 114 fixed on one surface of the heat transfer plate 113, Portions of the side surface (ends 113a, 113b, 113c, 113d) of the plate 113 that are located below the end surfaces of the ribs 114 are formed to cover the respective sides.

According to the heat exchange element 106a according to the second embodiment, the rib 114 and the side surfaces (ends 113a, 113b, 113c, 113d) of the heat transfer plate 113 are formed by the protective layer 130 by adopting such a configuration. The bonding area of the protective layer 130 can be larger than that in a configuration in which the protective layer 130 is provided only on the end face of the rib 114. That is, the bonding strength between the heat transfer plate 113 and the protective layer 130 and between the rib 114 and the protective layer 130 can be increased by increasing the adhesive strength of the protective layer 130. Thus, for example, when carrying the heat exchange element 106a during maintenance, the hand of the person carrying the heat exchange element 106a contacts the outer surface of the heat exchange element 106a, and when an external force is generated, the side surface (end edge) of the heat transfer plate 113 113a, 113b, 113c, 113d) can be more reliably suppressed by the protective layer 130 from direct contact of the hand. Therefore, when an external force is generated on the outer surface of the heat exchange element 106a, in addition to the fraying of the fiber member 140 on the end face of the rib 114, it is possible to obtain a heat exchange element having higher strength in which the heat transfer plate 113 is not easily broken. Can be.

The protective layer 130 is formed by laminating the required number of heat exchange element pieces 115a to form the heat exchange element 106a, and then stacking the heat exchange element pieces 115a in the laminating direction and the end faces of the ribs 114 and the side faces of the heat transfer plate 113 (end sides 113a, 113b, 113c, 113d). In this case, the number of curing steps required for hardening the protective layer 130 can be reduced as compared with the case where the protective layer 130 is formed one by one before stacking the heat exchange element pieces 115a. An exchange element 106a can be provided.

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

In the first embodiment, the protection layer 130 is configured to protrude from the end of the heat transfer plate 113 toward the outside of the heat exchange element piece 115 at the end face of the rib 114, but the present invention is not limited to this. For example, the protective layer 130 may be provided on the end face of the rib 114 so as to be located inside the heat exchange element piece 115 from the end of the heat transfer plate 113. Alternatively, the protective layer 130 may be provided so as to be flush with the edge of the heat transfer plate 113. Thereby, when an external force is generated on the outer surface of the heat exchange element 106, it is possible to further prevent the fiber member 140 from fraying on the end surface of the rib 114.

In the first and second embodiments, the protective layer 130 is configured to selectively cover the end surface of the rib 114, but the present invention is not limited to this. For example, the protective layer 130 may be configured to cover the side surface of the rib 114 in addition to the end surface of the rib 114. Thereby, the adhesive strength of the protective layer 130 can be further increased, and the reliability of protecting the end face of the rib 114 by the protective layer 130 can be improved.

Here, the heat exchange type ventilator 102 of the present embodiment is a “heat exchange type ventilator” in the claims, the exhaust flow 103 is an “exhaust flow” in the claims, the supply air flow 104 is a “supply air flow” in the claims, The heat exchange element 106 corresponds to a “heat exchange element” in the claims. The heat transfer plate 113 corresponds to a “partition member” in the claims, the rib 114 corresponds to a “spacing member” in the claims, and the heat exchange element piece 115 corresponds to a “unit constituent member” in the claims. Further, the exhaust air path 116 is a “exhaust air path” in the claims, the supply air path is a “supply air path” in the claims, the protective layer 130 is a “protective member” in the claims, and the fiber member 140 is a “fiber” in the claims. Member ".

(Embodiment 3)
Conventionally, as a structure of a heat exchange element used in this type of heat exchange type ventilation device, in order to secure reliability by improving sealability (a seal function for preventing air flowing through an air flow path from leaking outside), For example, the one described in Patent Document 1 is known.

FIG. 13 is an exploded perspective view showing the structure of a conventional heat exchange element 21.

As shown in FIG. 13, the heat exchange element 21 is configured by laminating a large number of heat exchange elements 22 each composed of functional paper 23 having heat conductivity and ribs 24. On one surface of the functional paper 23, a plurality of paper cords 25 and a plurality of ribs 24 made of a hot melt resin 26 for bonding the paper cords 25 to the functional paper 23 are provided in parallel at predetermined intervals. Due to the ribs 24, a gap is formed between a pair of adjacent functional papers 23 to form an air flow path 27. The heat exchange element 21 is formed such that a plurality of gaps are stacked, and the air blowing directions of the respective air flow paths 27 in adjacent gaps are configured to be orthogonal to each other. Thereby, the supply air flow and the exhaust air flow alternately through the air flow path 27 for each functional paper 23, and heat exchange is performed between the air supply flow and the exhaust air flow.

In such a conventional heat exchange element 21, a rib 24 is formed by enclosing a paper string 25 having a substantially circular cross section with a hot melt resin 26, and the formed rib is bonded to the functional paper 23 by the hot melt resin 26. Thus, the configuration is such that the interval between the functional papers 23 is maintained. For this reason, the functional paper 23 and the paper cord 25 absorb the moisture in the air to change their dimensions. In particular, the dimensional change of the paper cord 25 wrapped by the hot melt resin 26 causes the ribs 24 and the functional paper 23 may be peeled off. As a result, the strength required for maintaining the interval between the functional papers 23 is lost, and the air path is collapsed, so that the air flowing through the heat exchange element 21 is biased and the heat exchange efficiency is reduced. That is, in the conventional heat exchange element, the adhesion between the spacing member (for example, the above-described rib) and the partition member (for example, the above-described functional paper) is peeled off due to a dimensional change due to moisture absorption, and the air passage is blocked, resulting in heat exchange. There is a problem that efficiency is reduced.

Therefore, the present disclosure provides a heat exchange element and a heat exchange type ventilation device using the same, which can suppress blockage of an air path due to peeling of an adhesive between a partition member and a spacing member, which is caused by a dimensional change due to moisture absorption. The purpose is to provide.

In order to achieve this object, a heat exchange element according to the present disclosure includes a unit member including a partition member having heat conductivity, and a plurality of spacing members provided in parallel on one surface of the partition member. And a heat exchange element in which an exhaust airflow and an air supply airflow are alternately formed one layer at a time, and an exhaust flow flowing through the exhaust airflow and a supply airflow flowing through the air supply airflow exchange heat via a partition member. The partition member and the spacing member are fixed to each other by an adhesive member, and the spacing member is constituted by a plurality of fiber members having hygroscopicity, and is impregnated with the adhesive member. This achieves the intended purpose.

According to the present disclosure, there is provided a heat exchange element capable of suppressing blockage of an air passage due to peeling of a partition member and a spacing member caused by dimensional change due to moisture absorption, and a heat exchange type ventilation device using the same. Obtainable.

The heat exchange element according to the present disclosure is configured such that a unit member including a partition member having heat conductivity and a plurality of spacing members provided in parallel on one surface of the partition member is stacked, and an exhaust air path and an air supply A heat exchange element in which the passages are alternately formed one layer at a time, and wherein the exhaust flow flowing through the exhaust air passage and the supply air flow flowing through the supply air passage exchange heat via a partition member; Are fixed to each other by an adhesive member, and the spacing member is formed of a plurality of fiber members having a hygroscopic property, and is formed by impregnating the adhesive member.

This can prevent the air passage from being blocked due to peeling of the adhesive between the partition member and the spacing member, which is caused by a dimensional change due to moisture absorption. Therefore, the bias of the air flowing through the heat exchange element is eliminated, and the heat exchange efficiency can be maintained high by blowing the air in the air path of the heat exchange element at a uniform wind speed and wind pressure.

The bonding region of the bonding member may have a first bonding region in which the bonding member is impregnated in the spacing member, and a second bonding region in which the surface of the spacing member is covered with the bonding member. As a result, compared to the bonding area of the bonding member impregnated with the plurality of fiber members, the bonding area increases, so that the adhesive force between the partition member and the spacing member increases, and the bonding between the partition member and the spacing member increases. Blockage of the air path due to peeling can be suppressed. Therefore, the bias of the air flowing through the heat exchange element is eliminated, and the heat exchange efficiency can be maintained high by blowing the air in the air path of the heat exchange element at a uniform wind speed and wind pressure.

間隔 The spacing member may be configured such that a plurality of fiber members are twisted. Thereby, the tension of the spacing member is increased by twisting the fiber member, the dimensional change of the spacing member due to moisture absorption is suppressed, and the blockage of the air passage due to the peeling off of the adhesive between the partition member and the spacing member is suppressed. Can be. Therefore, the bias of the air flowing through the heat exchange element is eliminated, and the heat exchange efficiency can be maintained high by blowing the air in the air path of the heat exchange element at a uniform wind speed and wind pressure.

接着 Also, the adhesive member may be configured to have lower hygroscopicity than the spacing member. Thereby, even if the spacing member absorbs moisture, the adhesive member is fixed, so that a dimensional change due to moisture absorption of the spacing member can be suppressed. That is, it is possible to suppress the air passage from being blocked due to peeling of the adhesive between the partition member and the spacing member, which is caused by a dimensional change of the spacing member due to moisture absorption. Therefore, the bias of the air flowing through the heat exchange element is eliminated, and the heat exchange efficiency can be maintained high by blowing the air in the air path of the heat exchange element at a uniform wind speed and wind pressure.

熱 Further, the heat exchange ventilator according to the present disclosure is configured by mounting the above heat exchange element.

First, with reference to FIG. 8 and FIG. 9, an outline of the heat exchange type ventilator 202 including the heat exchange element 206 according to the third embodiment of the present disclosure will be described. FIG. 8 is a schematic diagram illustrating an installation example of the heat exchange type ventilator 202 including the heat exchange element 206. FIG. 9 is a schematic diagram showing the structure of the heat exchange ventilator 202.

に お い て In FIG. 8, a heat exchange type ventilator 202 is installed inside a house 201. The heat exchange type ventilator 202 is a device that ventilates while exchanging heat between indoor air and outdoor air.

排 気 As shown in FIG. 8, the exhaust stream 203 is discharged outside through the heat exchange ventilator 202 as indicated by black arrows. The exhaust flow 203 is a flow of air discharged from indoors to outdoors. Further, the supply airflow 204 is taken into the room through the heat exchange ventilator 202 as indicated by a white arrow. The air supply flow 204 is a flow of air taken in from indoors to outdoors. For example, in winter in Japan, the exhaust stream 203 may be at 20 to 25 ° C., while the supply stream 204 may reach a temperature below freezing. The heat exchange type ventilator 202 performs ventilation and transmits heat of the exhaust stream 203 to the air supply stream 204 during the ventilation to suppress unnecessary heat release.

As shown in FIG. 9, the heat exchange ventilator 202 includes a main body case 205, a heat exchange element 206, an exhaust fan 207, an inside air port 208, an exhaust port 209, an air supply fan 210, an outside air port 211, and an air supply port 212. ing. The main body case 205 is an outer frame of the heat exchange type ventilator 202. On the outer periphery of the main body case 205, an inside air port 208, an exhaust port 209, an outside air port 211, and an air supply port 212 are formed. The inside air port 208 is a suction port that sucks the exhaust stream 203 into the heat exchange type ventilator 202. The exhaust port 209 is an outlet for discharging the exhaust stream 203 from the heat exchange ventilator 202 to the outside. The outside air port 211 is a suction port that sucks the supply airflow 204 into the heat exchange ventilator 202. The air supply port 212 is a discharge port that discharges the air supply flow 204 from the heat exchange ventilator 202 into the room.

熱 A heat exchange element 206, an exhaust fan 207, and an air supply fan 210 are mounted inside the main body case 205. The heat exchange element 206 is a member for exchanging heat between the exhaust gas flow 203 and the supply air flow 204. The exhaust fan 207 is a blower that sucks the exhaust stream 203 from the inside air port 208 and discharges the exhaust stream 203 from the exhaust port 209. The air supply fan 210 is a blower for sucking the air supply flow 204 from the outside air port 211 and discharging it from the air supply port 212. By driving the exhaust fan 207, the exhaust stream 203 sucked from the inside air port 208 passes through the heat exchange element 206 and the exhaust fan 207, and is discharged from the exhaust port 209 to the outside. Further, the air supply flow 204 sucked from the outside air port 211 by driving the air supply fan 210 is supplied from the air supply port 212 to the room through the heat exchange element 206 and the air supply fan 210.

Next, the heat exchange element 206 will be described with reference to FIGS. FIG. 10 is an exploded perspective view showing the structure of the heat exchange element 206, and FIG. 11 is a partial sectional view showing the structure of the rib 214.

熱 As shown in FIG. 10, the heat exchange element 206 is composed of a plurality of heat exchange element pieces 215. Each of the heat exchange element pieces 215 has a plurality of ribs 214 bonded to one surface of a substantially square heat transfer plate 213. The heat exchange element 206 is formed by laminating a plurality of heat exchange element pieces 215 with the orientation changed so that the ribs 214 are orthogonal to each other one by one. With such a configuration, the exhaust air passage 216 through which the exhaust air flow 203 flows and the air supply air passage 217 through which the air supply flow 204 flows are formed, and the exhaust air flow 203 and the air supply flow 204 alternately and orthogonally flow. To allow heat exchange between them.

The heat exchange element piece 215 is one unit constituting the heat exchange element 206. As described above, the heat exchange element piece 215 is formed by bonding the plurality of ribs 214 on one surface of the substantially square heat transfer plate 213. The rib 214 on the heat transfer plate 213 is formed so that its longitudinal direction is directed from one end of the heat transfer plate 213 to the other end opposite thereto. The ribs 214 are arranged in parallel on the surface of the heat transfer plate 213 at predetermined intervals. Specifically, as shown in FIG. 10, a rib is provided on one surface of a heat transfer plate 213 that constitutes one of the two heat exchange element pieces 215 vertically adjacent to each other. The heat transfer plate 213 is formed by bonding such that the longitudinal direction of the heat transfer plate 213 goes from the end side 213a to the opposite end side 213c. In addition, on one surface of the heat transfer plate 213 constituting the other heat exchange element piece 215, the longitudinal direction of the rib 214 is an end 213b of the heat transfer plate 213 (perpendicular to the end 213a). Is formed so as to adhere to the opposite end side 213d.

The heat transfer plate 213 is a plate-shaped member for exchanging heat when the exhaust gas flow 203 and the supply air flow 204 flow with the heat transfer plate 213 interposed therebetween. The heat transfer plate 213 is formed of heat transfer paper based on cellulose fibers, and has heat conductivity, moisture permeability, and moisture absorption. However, the material of the heat transfer plate 213 is not limited to this. As the heat transfer plate 213, for example, a moisture-permeable resin film based on polyurethane or polyethylene terephthalate, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber can be used. The heat transfer plate 213 is a thin sheet having heat conductivity, and may be a sheet having a property of not allowing gas to permeate.

The rib 214 is provided between a pair of opposing sides of the heat transfer plate 213 and is formed so as to extend from one side to the other side. The rib 214 has a substantially cylindrical shape for forming a gap for allowing the exhaust flow 203 or the supply air flow 204 to flow between the heat transfer plates 213 when the heat transfer plates 213 are stacked, that is, for forming the exhaust air passage 216 or the supply air passage 217. It is a member of.

As shown in FIG. 11, the rib 214 has a substantially circular cross section. The rib 214 is composed of a plurality of fiber members 240, and is fixed to the heat transfer plate 213 via an adhesive member 241. Further, the rib 214 is configured by impregnating the adhesive member 241 into each minute gap between the fiber members 240. Note that the adhesive member 241 is impregnated up to the center of the rib 214 (a minute gap between the fiber members 240 located at the center of the rib 214).

As shown in FIG. 11, each of the fiber members 240 is a fiber member having a substantially circular cross section and extending in the same direction as the rib 214. As a material of the fiber member 240, a material having a hygroscopic property and a certain strength is sufficient, for example, a resin member such as polypropylene, polyethylene, polyethylene terephthalate, or polyamide, or a cellulose fiber, a ceramic fiber, and a glass fiber as a base. Paper material, or cotton, silk, and hemp can be used.

When a metal is used for the fiber member 240, the metal itself does not have a hygroscopic property. However, in the aggregate of the fiber member 240, a water absorbing action occurs due to a capillary phenomenon that retains moisture in the air in a space of the fiber member 240. Therefore, the fiber member 240 can be provided with a water absorbing function. As the number of the fiber members 240 increases, the hygroscopicity increases, but the strength of the fiber members 240 also increases.

Note that the bonding between the rib 214 and the heat transfer plate 213 is performed by impregnating the adhesive member 241 into a plurality of fiber members 240 constituting the rib 214 and then arranging the rib 214 on one surface of the heat transfer plate 213. , May be performed by thermal welding of the adhesive member 241. Alternatively, the rib 214 is disposed on one surface of the heat transfer plate 213 and the adhesive member 241 is applied, and impregnation of the plurality of fiber members 240 constituting the rib 214 and heat welding of the heat transfer plate 213 are performed. It may be performed simultaneously.

Here, the problem of the related art will be described again with reference to FIGS.

給 In a season with low outdoor humidity such as winter in Japan, the supply air flow 204 has a lower humidity than the exhaust air flow 203. Therefore, when the water vapor in the air riding on the exhaust flow 203 passes through the exhaust air passage 216, it adheres to the rib 214 forming the exhaust air passage 216, the fiber member 240 absorbs the water vapor, and the fiber member 240 Expands in the fiber radial direction. Similarly, since the water vapor in the air is absorbed by the heat transfer plate 213 through which the exhaust flow 203 flows, the heat transfer plate 213 also changes its dimensions due to expansion. When the heat transfer plate 213 and the rib 214 have different hygroscopicity, the heat transfer plate 213 and the rib through which the exhaust flow 203 flows are pulled by the dimensional change due to expansion of the higher hygroscopicity due to the pulling of the lower hygroscopic member. The bonding point of 214 is weakened and peeling occurs. The separation between the heat transfer plate 213 through which the exhaust flow 203 flows and the rib 214 causes the pressure of the supply air flow 204 flowing below the heat transfer plate 213 through which the exhaust flow 203 flows in FIG. The heat transfer plate 213 through which the air flows is bent, and the exhaust air passage 216 is closed. When the exhaust air passage 216 is partially blocked, the air flow is partially reduced, and the exhaust flow 203 flows with a non-uniform air flow balance to the heat transfer plate 213, so that the heat exchange efficiency of the heat exchange element 206 is increased. Decrease.

Therefore, in the heat exchange element 206 according to the third embodiment, since the rib 214 is impregnated with the adhesive member 241, the adhesive force of each of the plurality of fiber members 240 increases, and the dimensional change of the rib 214 is suppressed. ing. In particular, since the bonding member 241 is impregnated up to the center of the rib 214, the dimensional change of the rib 214 is more firmly suppressed. Further, since the bonding member 241 is bonded to the heat transfer plate 213 via the rib 214, the bonding area between the heat transfer plate 213 and the rib 214 is increased, and the bonding force between the heat transfer plate 213 and the rib 214 is increased. Is increasing.

As described above, according to the heat exchange element 206 according to Embodiment 3, the adhesion peeling caused by the dimensional change of the heat transfer plate 213 and the rib 214 due to the absorption of the moisture in the air of the exhaust stream 203 is suppressed. It is possible to suppress the blockage of the exhaust air passage 216. Therefore, the bias of the air flowing through the heat exchange element 206 is eliminated, and the heat exchange efficiency can be maintained high by blowing the air in the exhaust air passage 216 of the heat exchange element 206 at a uniform wind speed and pressure.

On the other hand, in a season with high outdoor humidity such as summer in Japan, the exhaust stream 203 has a lower humidity than the supply stream 204. Therefore, when the water vapor in the air flowing in the air supply flow 204 passes through the air supply air passage 217, the water vapor adheres to the rib 214 forming the air supply air passage 217, the fiber member 240 absorbs the water vapor, and the fiber member 240 Expands in the fiber radial direction. Similarly, since the water vapor in the air is also absorbed by the heat transfer plate 213 through which the air supply flow 204 flows, the heat transfer plate 213 also changes its dimensions due to expansion. If the heat transfer plate 213 and the rib 214 have different hygroscopicity, the heat transfer plate 213 and the rib through which the air supply flow 204 flows are pulled by the dimensional change due to the expansion of the higher hygroscopicity due to the expansion of the member having the lower hygroscopicity. The bonding point of 214 becomes weak and peels off. Due to the separation between the heat transfer plate 213 through which the supply air flow 204 flows and the rib 214, the pressure of the exhaust flow 203 flowing below the heat transfer plate 213 through which the supply air flow 204 flows is applied in FIG. The heat transfer plate 213 through which the air flows is bent, and the air supply air passage 217 is closed. When the air supply air passage 217 is partially blocked, the air flow is partially reduced, and the air supply flow 204 flows with a non-uniform air flow balance to the heat transfer plate 213, so that the heat exchange efficiency of the heat exchange element 206 is increased. Decrease. However, according to the heat exchange element 206 according to the third embodiment, even in this case, the same effect as that described in the winter in Japan can be enjoyed.

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

Further, the bonding region of the bonding member 241 described in the third embodiment includes a first bonding region 242 in which the bonding member 241 is impregnated inside the rib 214, and a surface of the rib 214 covered (encapsulated) by the bonding member 241. ) May be provided. This configuration will be described with reference to FIG.

FIG. 12 is a partial cross-sectional view showing a structural example of a rib 214a according to a modification. In addition to the first bonding region 242 where the plurality of fiber members 240 are fixed by impregnation of the bonding member 241, the bonding member 241 is attached to the rib 214 a according to this modification so as to cover the exposed portion of the fiber member 240. Is formed on the second adhesive region 243 to which is applied. Thereby, compared to a configuration in which the bonding member 241 is impregnated only in the plurality of fiber members 240, that is, a configuration having only the first bonding region 242 (the configuration of the rib 214 according to the third embodiment), the bonding area is smaller. Because of the increase, the adhesive force between the heat transfer plate 213 and the rib 214a increases. As described above, it is possible to suppress the adhesion peeling caused by the dimensional change of the heat transfer plate 213 and the rib 214a due to the moisture absorption in the air of the exhaust flow 203 or the supply air flow 204, and the exhaust air passage 216 or the supply air Blockage of the air passage 217 can be suppressed. Therefore, the bias of the air flowing through the heat exchange element according to the modified example is eliminated, and the inside of the exhaust air path 216 or the supply air path 217 of the heat exchange element according to the modified example is blown at a uniform wind speed and wind pressure, so that the heat exchange efficiency is improved. Can be kept high.

The bonding member 241 used for the first bonding region 242 and the bonding member 241 used for the second bonding region 243 are not necessarily the same, and various selections can be made.

The ribs 214 and 214a may have a configuration in which a plurality of fiber members 240 are twisted. By twisting the plurality of fiber members 240 with each other, the tension of the rib 214 and the rib 214a increases. In addition, since the adhesive member 241 is impregnated in the void formed by twisting the plurality of fiber members 240, the contact area of the fiber members 240 increases, and the strength of the ribs 214 and 214a increases. As described above, by suppressing the dimensional change of the rib 214 and the rib 214a due to moisture absorption, it is possible to suppress the blockage of the air passage due to the peeling of the adhesive between the heat transfer plate 213 and the rib 214 and the rib 214a. Therefore, the bias of the air flowing through the heat exchange element is eliminated, and the heat exchange efficiency can be maintained high by blowing the air in the air path of the heat exchange element at a uniform wind speed and wind pressure.

The bonding member 241 may be configured to have lower hygroscopicity than the rib 214 and the rib 214a. Thus, even if the ribs 214 and 214a absorb moisture and the fiber member 240 attempts to change its dimensions due to expansion, the change in the dimensions of the ribs 214 can be suppressed because the adhesive member 241 having low hygroscopicity is fixed. . That is, it is possible to suppress the blockage of the exhaust air passage 216 or the supply air passage 217 due to peeling of the heat transfer plate 213 and the ribs 214 and 214a. Therefore, the bias of the air flowing through the heat exchange element is eliminated, and the heat exchange efficiency can be maintained high by blowing the air in the air path of the heat exchange element at a uniform wind speed and wind pressure.

The adhesive member 241 having low hygroscopicity is, for example, based on a solution-based adhesive (phenol resin or the like) or a non-solvent-based adhesive (epoxy resin-based or the like) which is cured by a chemical reaction, and has a hydrophilic group (for example, An adhesive containing no hydroxy group or the like can be used.

Regarding the terms used above, the heat transfer plate 213 of the present embodiment including the above-described modified example is a “partition member” in the claims, and the rib 214 and the rib 214a are a “spacing member” in the claims, and the heat exchange element piece 215. Corresponds to a “unit constituent member” in the claims. The exhaust air path 216 corresponds to an “exhaust air path” in the claims, the supply air path 217 corresponds to a “supply air path” in the claims, and the fiber member 240 corresponds to a “fiber member” in the claims. Furthermore, the bonding member 241 corresponds to a “bonding member”, the first bonding region 242 corresponds to a “first bonding region”, and the second bonding region 243 corresponds to a “second bonding region”.

As described above, the heat exchange element according to the present embodiment including the above-described modified example is capable of suppressing the air passage obstruction caused by the dimensional change of the rib due to moisture absorption and maintaining high heat exchange efficiency, It is useful as a heat exchange element for use in an exchange-type ventilator.

(Embodiment 4)
Conventionally, as a structure of a heat exchange element used in this type of heat exchange type ventilation device, in order to secure reliability by improving sealability (a seal function for preventing air flowing through an air flow path from leaking outside), For example, the one described in Patent Document 1 is known.

FIG. 19 is an exploded perspective view showing the structure of a conventional heat exchange element 31.

As shown in FIG. 19, the heat exchange element 31 is formed by stacking a large number of heat exchange elements 32 each composed of functional paper 33 having heat conductivity and ribs 34. On one surface of the functional paper 33, a plurality of paper strings 35 and a plurality of ribs 34 made of a hot melt resin 36 for bonding the paper strings 35 to the functional paper 33 are provided in parallel at predetermined intervals. Due to the ribs 34, a gap is formed between a pair of functional papers 33 stacked adjacent to each other, forming an air flow path 37. The heat exchange element 31 is formed such that a plurality of gaps are stacked, and the air blowing directions of the respective air flow paths 37 in adjacent gaps are configured to be orthogonal to each other. Thus, the supply air flow and the exhaust air flow alternately through the air flow path 37 for each functional paper 33, and heat exchange is performed between the air supply flow and the exhaust air flow.

In such a conventional heat exchange element, it is necessary to secure its strength in order to install the heat exchange type ventilation device, and it is necessary to attach a metal frame to the end of the heat exchange element. However, this causes a problem that the weight of the conventional heat exchange element increases.

Therefore, an object of the present disclosure is to provide a heat exchange element capable of realizing weight reduction while strengthening an end portion, and a heat exchange type ventilation apparatus using the same.

In order to achieve this object, a heat exchange element according to the present disclosure includes a unit member including a partition member having heat conductivity, and a plurality of spacing members provided in parallel on one surface of the partition member. And a heat exchange element in which an exhaust airflow and an air supply airflow are alternately formed one layer at a time, and an exhaust flow flowing through the exhaust airflow and a supply airflow flowing through the air supply airflow exchange heat via a partition member. The end interval holding member located at the outermost periphery of the interval holding member is made of a material having a heat melting property, and the end interval holding member vertically adjacent via the partition member has an end portion. Joined by heat melting. This achieves the intended purpose.

According to the present disclosure, it is possible to provide a heat exchange element capable of realizing weight reduction while strengthening an end portion, and a heat exchange type ventilation device using the same.

The heat exchange element according to the present disclosure is configured such that a unit member including a partition member having heat conductivity and a plurality of spacing members provided on one surface of the partition member is stacked to form an exhaust air path and a supply air path by one. A heat exchange element that alternately constitutes layers and that exchanges heat between the exhaust airflow flowing through the exhaust air passage and the supply airflow flowing through the supply air passage through the partition member, and is located at the outermost periphery of the spacing member. The end gap holding member to be formed is made of a material having a heat melting property, and the end gap holding members vertically adjacent to each other via the partition member are joined by heat melting at the ends.

As a result, the ends of the end interval maintaining members are integrated and the strength is improved. For example, the stacking direction of the heat exchange elements applied to the heat exchange elements when removing the heat exchange elements from the heat exchange ventilator The strength of the heat exchange element is improved with respect to the force of stretching. For this reason, a reinforcing member (for example, a metal frame) that increases the strength of the heat exchange element, which is necessary for the conventional heat exchange element, can be omitted, and a light-weight heat exchange element can be provided. .

端 Furthermore, the end interval holding members vertically adjacent to each other via the partition member may be joined by being melted by heat while projecting outward from the end side of the partition member.

Thereby, the end portion of the end portion interval holding member can be reliably covered at the time of heat melting, and the strength of the heat exchange element can be further improved.

The end spacing member and the partition member may be made of hydrophilic materials.

Thereby, when the end gap maintaining member is thermally melted, a part of the softened end gap maintaining member is diffused also to the end surface (edge) of the partition member, and the close contact between the end gap maintaining member and the partition member is achieved. Can be enhanced. The strength at the end of the end interval holding member can be further improved.

熱 Further, the heat exchange ventilator according to the present disclosure is configured by mounting the above heat exchange element.

First, with reference to FIG. 14 and FIG. 15, an outline of the heat exchange type ventilator 302 including the heat exchange element 306 according to Embodiment 4 of the present disclosure will be described. FIG. 14 is a schematic diagram illustrating an installation example of the heat exchange type ventilation device 302 including the heat exchange element 306. FIG. 15 is a schematic diagram showing the structure of the heat exchange type ventilation device 302.

In FIG. 14, a heat exchange ventilator 302 is installed inside a house 301. The heat exchange type ventilator 302 is a device that ventilates while exchanging heat between indoor air and outdoor air.

排 気 As shown in FIG. 14, the exhaust stream 303 is discharged outside through the heat exchange ventilator 302 as indicated by the black arrow. The exhaust flow 303 is a flow of air discharged from indoors to outdoors. Further, the supply air flow 304 is taken into the room through the heat exchange type ventilation device 302 as indicated by a white arrow. The supply air flow 304 is a flow of air taken from indoors to outdoors. For example, in winter in Japan, the exhaust stream 303 may be at 20 to 25 ° C., while the supply stream 304 may be below freezing. The heat exchange type ventilator 302 performs ventilation and transmits heat of the exhaust flow 303 to the air supply flow 304 during the ventilation to suppress unnecessary heat release.

As shown in FIG. 15, the heat exchange ventilator 302 includes a main body case 305, a heat exchange element 306, an exhaust fan 307, an inside air port 308, an exhaust port 309, an air supply fan 310, an outside air port 311, and an air supply port 312. ing. The main body case 305 is an outer frame of the heat exchange type ventilation device 302. On the outer periphery of the main body case 305, an inside air port 308, an exhaust port 309, an outside air port 311 and an air supply port 312 are formed. The inside air port 308 is a suction port that sucks the exhaust gas flow 303 into the heat exchange ventilator 302. The exhaust port 309 is an outlet that discharges the exhaust stream 303 from the heat exchange ventilator 302 to the outside. The outside air port 311 is a suction port that sucks the supply airflow 304 into the heat exchange ventilator 302. The air supply port 312 is a discharge port that discharges the air supply flow 304 from the heat exchange ventilator 302 into the room.

熱 A heat exchange element 306, an exhaust fan 307, and an air supply fan 310 are mounted inside the main body case 305. The heat exchange element 306 is a member for exchanging heat between the exhaust gas flow 303 and the supply air flow 304. The exhaust fan 307 is a blower for sucking the exhaust stream 303 from the inside air port 308 and discharging the exhaust stream 303 from the exhaust port 309. The air supply fan 310 is a blower that sucks the air supply flow 304 from the outside air port 311 and discharges the air from the air supply port 312. The exhaust flow 303 sucked from the inside air port 308 by driving the exhaust fan 307 passes through the heat exchange element 306 and the exhaust fan 307, and is discharged to the outside from the exhaust port 309. Further, the supply air flow 304 sucked from the outside air port 311 by driving the air supply fan 310 is supplied from the air supply port 312 to the room through the heat exchange element 306 and the air supply fan 310.

Next, the heat exchange element 306 will be described with reference to FIG. FIG. 16 is an exploded perspective view showing the structure of the heat exchange element 306. The ribs 314 include an air path rib 314a and a hot-melt rib 314b. However, in the following, when it is not necessary to particularly distinguish these ribs, they are simply described as ribs 314.

熱 As shown in FIG. 16, the heat exchange element 306 is composed of a plurality of heat exchange element pieces 315. Each of the heat exchange element pieces 315 has a plurality of ribs 314 (air path ribs 314a and heat melting ribs 314b) bonded on one surface of a substantially square heat transfer plate 313. The heat exchange element 306 is formed by laminating a plurality of heat exchange element pieces 315 with the ribs 314 alternately changed in direction so that the ribs 314 are orthogonal to each other. With such a configuration, an exhaust air passage 316 through which the exhaust flow 303 passes and an air supply passage 317 through which the supply air 304 passes are formed, and the exhaust flow 303 and the supply air flow 304 alternately and orthogonally flow. To allow heat exchange between them.

The heat exchange element piece 315 is one unit constituting the heat exchange element 306. As described above, the heat exchange element piece 315 is formed by bonding a plurality of ribs 314 on one surface of a substantially square heat transfer plate 313. The ribs 314 include an air path rib 314a and a heat melting rib 314b arranged along the outer edge of the heat transfer plate 313 so as to sandwich the air path rib 314a. Each of the plurality of ribs 314 is formed in a straight line. That is, the ribs 314 on the heat transfer plate 313 are formed linearly so that the longitudinal direction extends from one end of the heat transfer plate 313 to the other end opposite thereto. The ribs 314 are arranged in parallel at a predetermined interval. Specifically, as shown in FIG. 16, a rib is provided on one surface of the heat transfer plate 313 that constitutes one of the two heat exchange element pieces 315 vertically adjacent to each other. The heat transfer ribs 314 (the air passage ribs 314 a and the heat melting ribs 314 b) are formed by bonding such that the longitudinal direction of the heat transfer plate 313 goes from the end 313 a to the opposing end 313 c. On one surface of the heat transfer plate 313 constituting the other heat exchange element piece 315, the longitudinal direction of the rib 314 (the air passage rib 314 a and the heat melting rib 314 b) is positioned at the end of the heat transfer plate 313. It is formed by bonding from a side 313b (perpendicular to the end side 313a) to an opposite end side 313d. In particular, the heat melting rib 314b is formed along the edge 313b and the edge 313d at the outer edge of the heat transfer plate 313 at the outermost position of the rib 314.

As described above, the heat exchange element 306 is configured by stacking a plurality of heat exchange element pieces 315 in different directions, and the corners of each heat exchange element piece 315 are formed by upper and lower heat melting ribs 314b. They are joined to each other by a rib joining portion 352 that is integrated by heat melting. The rib joint 352 will be described later.

The heat transfer plate 313 is a thin sheet having a heat transfer property for performing heat exchange when the exhaust gas flow 303 and the supply air flow 304 flow through the heat transfer plate 313, and has a property of preventing gas from permeating. Can be used. The heat transfer plate 313 is formed of heat transfer paper based on cellulose fibers, has heat transferability, moisture permeability, and moisture absorption, and can obtain the heat exchange element 306 that exchanges heat and moisture. However, the material of the heat transfer plate 313 is not limited to this. As the heat transfer plate 313, a heat exchange element 306 that exchanges only heat can be obtained by using, for example, a metal sheet such as aluminum or iron, or a resin sheet such as polyethylene or polypropylene. Further, by using a moisture-permeable resin membrane based on polyurethane or polyethylene terephthalate, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber, the heat exchange element 306 that exchanges moisture in addition to heat is used. Obtainable.

The rib 314 is provided between a pair of opposing sides of the heat transfer plate 313, and is formed so as to extend from one side to the other side. The rib 314 has a substantially cylindrical shape for forming a gap for allowing the exhaust flow 303 or the supply air flow 304 to flow between the heat transfer plates 313 when the heat transfer plates 313 are stacked, that is, for forming the exhaust air passage 316 or the supply air passage 317. It is a member of. Although the cross-sectional shape of the rib 314 is substantially circular, a member having a shape other than a substantially circular shape such as a rectangular shape or a hexagonal prism may be used as the cross-sectional shape of the rib 314.

As described above, the ribs 314 include the air path ribs 314a and the heat-melting ribs 314b arranged on the outer edge of the heat transfer plate 313 at the outermost position of the ribs 314.

The material of the air path rib 314a only needs to have a certain strength for maintaining the lamination interval between the heat exchange element pieces 315, for example, a resin member such as polypropylene, polyethylene, polyethylene terephthalate, or polyamide, aluminum, iron, or copper. Or a paper material based on cellulose fiber, ceramic fiber, or glass fiber, or a cotton, silk, hemp, or wool product.

As with the air path rib 314a, the material of the heat melting rib 314b needs to have a certain strength to maintain the stacking interval between the heat exchange element pieces 315, and needs to be softened by heating and hardened by cooling. is there. For example, resin members such as polyethylene, polypropylene, polystyrene, polyurethane, and nylon, which are thermoplastic resins, may be used.

In particular, when a hydrophilic material, for example, a paper material using cellulose fibers or a resin member such as polyurethane is used as the heat transfer plate 313, a resin member such as polyurethane or nylon which is also hydrophilic is used for the hot-melt rib 314b. The use of the heat-melting rib 314b is more preferable because the heat-melting rib 314b is easily diffused on the heat transfer plate 313 when softened by heating, and the adhesion is improved.

Note that the heat transfer plate 313 and the ribs 314 (the air passage ribs 314a and the hot melt ribs 314b) can be bonded by a known means, and the heat transfer plate 313 and the ribs 314 are bonded using, for example, an adhesive. be able to.

Next, the rib joint 352 will be described with reference to FIGS. 17A and 17B. FIG. 17A is a partial perspective view showing a part of a portion where two heat exchange element pieces 315 before heat fusion constituting the heat exchange element 306 are stacked. FIG. 17B is a partial perspective view showing a part of a portion where two heat exchange element pieces 315 after heat fusion that constitute the heat exchange element 306 are stacked.

{Circle around (1)} As shown in FIG. 17A, first, a heat exchange element assembly in which a plurality of heat exchange element pieces are stacked while changing the direction of the heat exchange element pieces 315 is assembled. At this stage, the rib joint 352 is not formed at the corner of the heat exchange element piece 315. Thereafter, the corner of the heat exchange element piece 315 is heated, and the heat melting rib 314b is melted. As a result, the heat melting rib 314b is softened, and as shown in FIG. 17B, the corners of the heat exchange element piece 315 (ends of the heat melting rib 314b vertically adjacent via the heat transfer plate 313) move up and down. Are joined together to form an integrated rib joint 352.

As described above, according to the heat exchange element 306 according to the fourth embodiment, the ends of the heat melting ribs 314 b vertically adjacent via the heat transfer plate 313 are integrated, and the strength at the corners of the heat exchange element piece 315. Improve. Therefore, for example, when the heat exchange element 306 is removed from the heat exchange ventilator 302 and applied to the heat exchange element 306 such that the heat exchange element 306 is stretched in the stacking direction of the heat exchange element 306, The strength of is improved. For this reason, a reinforcing member (for example, a metal frame) that increases the strength of the heat exchange element, which is necessary for the conventional heat exchange element, can be omitted, and a light-weight heat exchange element can be provided. .

When the heat-melting rib 314b and the heat transfer plate 313 are made of a hydrophilic material, when the heat-melting rib 314b is melted by heat, the heat-transferred plate 313 also has a softened heat. Part of the molten rib 314b is diffused, and the adhesion between the heat-melted rib 314b and the heat transfer plate 313 can be increased. Therefore, the strength at the corners of the hot-melt rib 314b can be further improved.

(Embodiment 5)
Rib joint portion 352a of the heat exchange element according to Embodiment 5 of the present disclosure is formed by heat-melting with heat-melting rib 314b protruding outside the end surface (end side) of heat transfer plate 313. Except for this point, the third embodiment is the same as the fourth embodiment. Hereinafter, the description of the fourth embodiment will not be repeated, and only the points different from the fourth embodiment will be mainly described.

First, the rib joint 352a of the heat exchange element according to Embodiment 5 will be described with reference to FIGS. 18A and 18B. FIG. 18A is a partial perspective view showing a part of a portion where two pieces of the heat exchange element pieces according to the fifth embodiment before the heat melting constituting the heat exchange element according to the fifth embodiment of the present disclosure are layered. It is. FIG. 18B is a partial perspective view showing a part of a portion obtained by stacking two heat exchange element pieces according to the fifth embodiment after heat melting that constitutes the heat exchange element according to the fifth embodiment. is there.

As shown in FIG. 18A, the heat exchange element piece according to the fifth embodiment includes a plurality of ribs 314 on one surface of a heat transfer plate 313, the same air path ribs 314 a as in the fourth embodiment, and A heat-melting rib 314b protruding outward from an end of the heat transfer plate 313 so as to sandwich the road rib 314a. More specifically, the hot-melt rib 314b is formed so as to protrude outward along the longitudinal direction of the hot-melt rib 314b from an end of the heat transfer plate 313. Then, using the heat exchange element piece according to the fifth embodiment, an assembly of a plurality of heat exchange elements stacked with the direction of the heat exchange element piece according to the fifth embodiment changed is assembled. At this stage, as in the fourth embodiment, the rib joint 352a is not formed at the corner of the heat exchange element piece according to the fifth embodiment. Then, the corners of the heat exchange element piece according to Embodiment 5 are heated, and the heat melting ribs 314b are melted. As a result, the heat melting rib 314b is softened, and as shown in FIG. 18B, the corners of the heat exchange element piece according to Embodiment 5 (the ends of the heat melting rib 314b vertically adjacent via the heat transfer plate 313). ), Upper and lower heat melting ribs 314b are joined together (projecting portions of the upper and lower heat melting ribs 314b) to form an integrated rib joint 352a.

As described above, according to the heat exchange element of the fifth embodiment, at the time of heat melting, the corners of the heat exchange element piece according to the fifth embodiment (the ends of the heat melting ribs 314b vertically adjacent via the heat transfer plate 313). ) Can be surely covered, and the strength of the heat exchange element according to Embodiment 5 can be further improved.

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

Here, the heat exchange type ventilator 302 of the fourth embodiment and the heat exchange type ventilator of the fifth embodiment are referred to as “heat exchange type ventilator”, and the exhaust flow 303 of the fourth and fifth embodiments is referred to. The “exhaust flow” and the supply air flow 304 correspond to “the supply air flow” in the claims, and the heat exchange element 306 of the fourth embodiment and the heat exchange element of the fifth embodiment correspond to the “heat exchange elements” in the claims. The heat transfer plates 313 of the fourth and fifth embodiments are “partition members” in the claims, the ribs 314 are “interval holding members” in the claims, and the heat-melting ribs 314b are the “end interval maintenance members” in the claims. The heat exchange element piece 315 according to the fourth embodiment and the heat exchange element piece according to the fifth embodiment correspond to “unit constituent members” in the claims. Further, the exhaust air path 316 of the fourth and fifth embodiments corresponds to an “exhaust air path” in the claims, and the supply air path 317 corresponds to a “supply air path” in the claims.

As described above, the heat exchange elements according to Embodiments 4 and 5 can omit the reinforcing member that increases the strength of the heat exchange element, which is necessary for the conventional heat exchange element. The present invention provides an element, and is useful as a heat exchange element used in a heat exchange ventilator or the like.

(Embodiment 6)
2. Description of the Related Art Conventionally, as a structure of a heat exchange element used in this type of heat exchange ventilator, for example, a structure described in Patent Literature 1 is known in order to realize low cost and light weight.

FIG. 26 is an exploded perspective view showing the structure of a conventional heat exchange element 41.

As shown in FIG. 26, the heat exchange element 41 is configured by laminating a large number of heat exchange elements 42 each composed of functional paper 43 having heat conductivity and ribs 44. On one surface of the functional paper 43, a plurality of paper cords 45 and a plurality of ribs 44 made of a hot melt resin 46 for bonding the paper cords 45 to the functional paper 43 are provided in parallel at predetermined intervals. Due to the ribs 44, a gap is formed between a pair of functional papers 43 stacked adjacent to each other, forming an air flow path 47. The heat exchange element 41 is formed such that a plurality of gaps are stacked, and the air blowing directions of the respective air passages 47 in the adjacent gaps are configured to be orthogonal to each other. Thereby, the supply air flow and the exhaust air flow alternately through the air flow path 47 for each functional paper 43, and heat exchange is performed between the air supply flow and the exhaust air flow.

In such a conventional heat exchange element, a plurality of paper cords having a substantially circular cross section are bonded with a hot melt resin so as to be tangent to the functional paper (a state in which a circle and a surface are in contact). In such a configuration, since the paper string and the functional paper are bonded only at a tangent portion, the bonding area is small and the bonding strength is weak. For this reason, when an external force such as pushing by hand is mistakenly applied to the surface of the heat exchange element during maintenance or the like, for example, the separation of the spacing member such as the above-described paper string and the partition member such as the above-described functional paper may occur. As a result, there is a problem in that the air that has passed through the heat exchange element leaks to the outside of the heat exchange element, resulting in insufficient ventilation.

Therefore, the present disclosure, when an external force is generated on the outer peripheral surface of the heat exchange element, suppresses separation between the spacing member and the partition member in the outer peripheral portion, and a heat exchange element capable of suppressing a reduction in ventilation. It is an object of the present invention to provide a heat exchange type ventilation device using the same.

In order to achieve this object, the heat exchange element according to the present disclosure is obtained by stacking a unit member including a partition member having heat conductivity and a plurality of spacing members provided on one surface of the partition member. A heat exchange element in which an exhaust air path and an air supply air path are alternately formed one layer at a time, and an exhaust flow flowing through the exhaust air path and a supply air flow flowing through the air supply air path exchange heat via a partition member. , The spacing member is fixed to the partition member by an adhesive member provided between the spacing member and the partition member, and the outer peripheral side surface of the heat exchange element with respect to the outermost spacing member of the spacing members. A sealing member formed to cover the side. This achieves the intended purpose.

According to the present disclosure, it is possible to obtain a heat exchange element and a heat exchange type ventilator using the same that are less likely to peel between the spacing member and the partition member in the outer peripheral portion and can suppress a decrease in the amount of ventilation.

The heat exchange element according to the present disclosure is configured such that a unit member including a partition member having heat conductivity and a plurality of spacing members provided on one surface of the partition member is stacked to form an exhaust air path and a supply air path by one. The heat exchange element is configured such that the layers are alternately arranged, and the exhaust flow flowing through the exhaust air path and the supply air flow flowing through the supply air path exchange heat via a partition member, and the spacing member is a spacing member. A sealing member fixed to the partition member by an adhesive member provided between the partition member and the outer peripheral side surface of the heat exchange element with respect to the outermost space holding member among the outer space holding members. It is configured to include a stop member.

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

封 止 Also, the sealing member may be formed so as to protrude outward from an end of the partition member.

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

Also, a configuration may be adopted in which the sealing member has lower hygroscopicity than the spacing member.

This suppresses the water (water vapor) in the air outside the heat exchange element from reaching the spacing member inside the sealing member. For this reason, it is possible to suppress the breakage of the adhesive member that secures the gap between the spacing member and the partition member by absorbing the moisture and expanding the spacing member. Therefore, the separation that occurs between the spacing member and the partition member can be made more difficult to occur.

熱 Further, the heat exchange ventilator according to the present disclosure is configured by mounting the above heat exchange element.

First, with reference to FIG. 20 and FIG. 21, an outline of the heat exchange type ventilation device 402 including the heat exchange element 406 according to the sixth embodiment of the present disclosure will be described. FIG. 20 is a schematic diagram illustrating an installation example of the heat exchange type ventilation device 402 including the heat exchange element 406. FIG. 21 is a schematic diagram showing the structure of the heat exchange type ventilation device 402.

In FIG. 20, a heat exchange type ventilator 402 is installed inside a house 401. The heat exchange type ventilation device 402 is a device that ventilates while exchanging heat between indoor air and outdoor air.

排 気 As shown in FIG. 20, the exhaust stream 403 is discharged outside through the heat exchange ventilator 402 as indicated by black arrows. The exhaust flow 403 is a flow of air discharged from indoors to outdoors. Further, the supply airflow 404 is taken into the room through the heat exchange type ventilation device 402 as indicated by a white arrow. The supply air flow 404 is a flow of air taken in from indoors to outdoors. For example, in winter in Japan, the exhaust stream 403 may be at 20 to 25 ° C., while the air supply stream 404 may be below freezing. The heat exchange type ventilator 402 performs ventilation and transmits heat of the exhaust flow 403 to the air supply flow 404 during the ventilation to suppress unnecessary heat release.

As shown in FIG. 21, the heat exchange ventilator 402 includes a main body case 405, a heat exchange element 406, an exhaust fan 407, an inside air port 408, an exhaust port 409, an air supply fan 410, an outside air port 411, and an air supply port 412. ing. The main body case 405 is an outer frame of the heat exchange type ventilation device 402. On the outer periphery of the main body case 405, an inside air port 408, an exhaust port 409, an outside air port 411, and an air supply port 412 are formed. The inside air port 408 is a suction port that sucks the exhaust gas flow 403 into the heat exchange ventilator 402. The exhaust port 409 is an outlet that discharges the exhaust stream 403 from the heat exchange ventilator 402 to the outside. The outside air port 411 is a suction port that sucks the supply airflow 404 into the heat exchange ventilator 402. The air supply port 412 is a discharge port that discharges the air supply flow 404 from the heat exchange ventilator 402 into the room.

熱 A heat exchange element 406, an exhaust fan 407, and an air supply fan 410 are mounted inside the main body case 405. The heat exchange element 406 is a member for performing heat exchange between the exhaust stream 403 and the supply stream 404. The exhaust fan 407 is a blower for sucking the exhaust stream 403 from the inside air port 408 and discharging the exhaust stream 403 from the exhaust port 409. The air supply fan 410 is a blower for sucking the air supply flow 404 from the outside air port 411 and discharging it from the air supply port 412. By driving the exhaust fan 407, the exhaust stream 403 sucked from the inside air port 408 passes through the heat exchange element 406 and the exhaust fan 407, and is discharged from the exhaust port 409 to the outside. Further, the air supply flow 404 sucked from the outside air port 411 by driving the air supply fan 410 is supplied to the room from the air supply port 412 via the heat exchange element 406 and the air supply fan 410.

Next, the heat exchange element 406 will be described with reference to FIGS. Although the rib 414 has an inner rib 414a and an outer rib 414b, the rib 414 will be simply described as a rib 414 when it is not necessary to particularly distinguish these ribs.

FIG. 22 is an exploded perspective view showing the structure of the heat exchange element 406. FIG. 23 is a partial cross-sectional view showing the structure of the rib 414. FIG. 24 is a partially enlarged view of the heat exchange element piece 415.

熱 As shown in FIG. 22, the heat exchange element 406 is composed of a plurality of heat exchange element pieces 415. Each of the heat exchange element pieces 415 has a plurality of ribs 414 (inner ribs 414a and outer ribs 414b to be described later) bonded to one surface of a substantially square heat transfer plate 413. The heat exchange element 406 is formed by laminating a plurality of heat exchange element pieces 415 with the ribs 414 alternately changed in direction so that the ribs 414 are perpendicular to each other. With such a configuration, an exhaust air path 416 through which the exhaust air flow 403 flows and an air supply air path 417 through which the air supply flow 404 flows are formed, and the exhaust air flow 403 and the air supply flow 404 alternately and orthogonally flow. To allow heat exchange between them.

The heat exchange element piece 415 is one unit that constitutes the heat exchange element 406. As described above, the heat exchange element piece 415 is formed by bonding a plurality of ribs 414 on one surface of a substantially square heat transfer plate 413. The rib 414 on the heat transfer plate 413 is formed so that its longitudinal direction is directed from one end of the heat transfer plate 413 to the end opposite thereto. Each of the plurality of ribs 414 is formed in a straight line. The ribs 414 are arranged in parallel at a predetermined interval. Specifically, as shown in FIG. 22, of two heat exchange element pieces 415 vertically adjacent to each other, one surface of a heat transfer plate 413 constituting one heat exchange element piece 415 is provided with a rib. The heat transfer plate 413 is formed by bonding such that the longitudinal direction of the heat transfer plate 413 is directed from the end side 413a to the opposite end side 413c. Further, on one surface of the heat transfer plate 413 constituting the other heat exchange element piece 415, the longitudinal direction of the rib 414 is located at an end 413b (perpendicular to the end 413a) of the heat transfer plate 413. Are formed so as to adhere to the opposite end side 413d. Further, the heat exchange element piece 415 is sealed on the outer peripheral side of the heat exchange element 406 (heat exchange element piece 415) with respect to the outermost rib 414 (outer rib 414b described later) among the plurality of ribs 414. A stop 450 is formed. The rib 414 and the sealing material 450 will be described later.

The heat transfer plate 413 is a plate-shaped member for performing heat exchange when the exhaust flow 403 and the supply air flow 404 flow across the heat transfer plate 413. The heat transfer plate 413 is formed of heat transfer paper based on cellulose fibers, and has heat conductivity, moisture permeability, and moisture absorption. However, the material of the heat transfer plate 413 is not limited to this. As the heat transfer plate 413, for example, a moisture-permeable resin film based on polyurethane or polyethylene terephthalate, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber can be used. The heat transfer plate 413 is a thin sheet having heat conductivity, and may be a sheet having a property of preventing gas from permeating.

A plurality of ribs 414 are provided between a pair of opposing sides of the heat transfer plate 413, and are formed so as to extend from one side to the other side. The rib 414 has a substantially cylindrical shape for forming a gap for allowing the exhaust flow 403 or the supply air flow 404 to flow between the heat transfer plates 413 when the heat transfer plates 413 are stacked, that is, for forming the exhaust air passage 416 or the supply air passage 417. It is a member of. In addition, as the cross-sectional shape of the rib 414, a member having a shape such as a rectangular shape or a hexagonal shape other than the substantially circular shape may be used.

リ ブ As shown in FIG. 23, each of the plurality of ribs 414 has a substantially circular cross section. The rib 414 is constituted by a plurality of fiber members 440, and is tangentially fixed to the heat transfer plate 413 via an adhesive member 441. The rib 414 has an adhesive member 441 on the surface layer, and is configured by impregnating the adhesive member 441 in each minute gap between the fiber members 440.

As shown in FIG. 23, each of the fiber members 440 is a fiber member having a substantially circular cross section and extending in the same direction as the rib 414. The material of the fiber member 440 is hygroscopic and has a certain strength. For example, a resin member such as polypropylene, polyethylene, polyethylene terephthalate, or polyamide, or cellulose fiber, ceramic fiber, or glass fiber may be used. Paper material, cotton, silk, and hemp can be used.

Note that the rib 414 and the heat transfer plate 413 are fixed by impregnating the adhesive member 441 into a plurality of fiber members 440 constituting the rib 414 and then disposing the rib 414 on one surface of the heat transfer plate 413. It may be performed by thermal welding of the surface adhesive member 441. Alternatively, the rib 414 is arranged on one surface of the heat transfer plate 413 and the adhesive member 441 is applied, and the impregnation of the plurality of fiber members 440 constituting the rib 414 and the heat welding with the heat transfer plate 413 are performed. It may be performed simultaneously.

As shown in FIG. 22, the plurality of ribs 414 have outer ribs 414b arranged along the outer edge of the heat transfer plate 413 and inner ribs 414a located between the outer ribs 414b at both ends. The outer rib 414b is a rib formed along the edge 413b or the edge 413d at the outer edge of the heat transfer plate 413, which is the outermost position of the rib 414 among the plurality of ribs 414. The inner rib 414a is a rib formed in a region between the outer ribs 414b at both ends of the plurality of ribs 414. The outer rib 414b is provided with a sealing material 450 that covers the outer peripheral side surface of the heat exchange element 406.

As shown in FIG. 24, the sealing material 450 is formed on the outer peripheral side of the heat exchange element 406 with respect to the outer rib 414b sandwiched between the upper and lower heat transfer plates 413. Specifically, the sealing material 450 is selectively formed so as to cover the outer peripheral side surface of the heat exchange element 406 with respect to the outer rib 414b which is sandwiched between the vertically adjacent heat transfer plates 413 and tangent. ing. Further, the sealing material 450 is formed in a state (concave shape) that is recessed from the edge of the heat transfer plate 413 toward the inside of the heat exchange element piece 415 (heat exchange element 406). After the necessary number of heat exchange element pieces 415 are laminated to form the heat exchange element 406, the sealing material 450 is applied to the outer rib 414 b sandwiched between the upper and lower heat transfer plates 413. It is formed by coating and curing on the outer peripheral side surface of the 406.

The sealing material 450 is preferably a chemical agent that exerts an adhesive force on the outer rib 414b. For example, when a paper string is used for the outer rib 414b, a vinyl acetate resin-based adhesive having good adhesion to hydrophilic paper is used. Is mentioned. Further, as the sealing material 450, a material having lower hygroscopicity than the rib 414 (outer rib 414b) can be selected. Further, a curing method such as moisture curing, pressure curing, and UV curing can be selected according to the manufacturing method. However, known adhesives and bonding methods can be used depending on the material of the outer rib 414b, not limited to these chemicals, and there is no difference in the effects.

According to the heat exchange element 406 according to Embodiment 6, the sealing material 450 joins the outer rib 414b and the heat transfer plate 413, and can increase the adhesive strength between the outer rib 414b and the heat transfer plate 413. . Therefore, when an external force such as an accidental push by hand is generated on the surface of the heat exchange element 406 during maintenance or the like, peeling between the outer rib 414b and the heat transfer plate 413 is less likely to occur, and the heat exchange element Leakage of the ventilated air to the outside of the heat exchange element 406 can be suppressed. As a result, it is possible to obtain the heat exchange element 406 capable of suppressing a decrease in the ventilation rate as compared with the conventional heat exchange element without the sealing material 450.

When a sealing material 450 having lower hygroscopicity than the outer ribs 414b is used, moisture (water vapor) in the air outside the heat exchange element 406 is reduced by the sealing material 450. Can be suppressed from reaching the outer rib 414b. For this reason, the outer rib 414b absorbs moisture and expands, and the separation between the outer rib 414b and the heat transfer plate 413 can be further reduced.

(Embodiment 7)
Next, with reference to FIG. 25, a heat exchange element 406a according to the seventh embodiment of the present disclosure will be described. FIG. 25 is a partially enlarged view showing the structure of the heat exchange element piece according to the seventh embodiment of the present disclosure.

The sealing material 450a of the heat exchange element 406a according to the sixth embodiment has a configuration that is recessed from the edge of the heat transfer plate 413 toward the inside of the heat exchange element piece 415a (heat exchange element 406a). On the other hand, the sealing material 450a of the heat exchange element 406a according to the seventh embodiment extends from the edge (outer edge) of the heat transfer plate 413 toward the outside of the heat exchange element piece 415a (heat exchange element 406a). It has a protruding configuration (convex shape). Note that the other configuration of the heat exchange element 406a is the same as that of the sixth embodiment, and a description thereof will not be repeated.

As shown in FIG. 25, the heat exchange element piece 415a according to the seventh embodiment is sealed so as to protrude from the edge of the heat transfer plate 413 toward the outside of the heat exchange element piece 415a (heat exchange element 406a). Material 450a is provided. Here, the direction in which the sealing material 450a protrudes outward is the direction away from the outer ribs 414b along the surface of the heat transfer plate 413 to which the outer ribs 414b are fixed. As in the sixth embodiment, the sealing material 450a is formed by laminating a required number of heat exchange element pieces 415a to form the heat exchange element 406a, and then with respect to the outer rib 414b sandwiched between the upper and lower heat transfer plates 413. The heat exchange element 406a is formed by coating and curing on the outer peripheral side surface of the heat exchange element 406a. It is formed so as to protrude toward the outside of 415a.

According to heat exchange element 406a according to the seventh embodiment, sealing material 450a joins outer rib 414b and heat transfer plate 413, and can increase the adhesive strength between outer rib 414b and heat transfer plate 413. Thus, the same effect as in the sixth embodiment can be enjoyed. In addition, the sealing material 450a protruding from the edge of the heat transfer plate 413 allows the hand of the person carrying the heat to contact the outer surface of the heat exchange element 406a, and when an external force is generated, the outer rib 414b and In the process in which the external force is transmitted to each of the heat transfer plates 413, the external force is dispersed by the deformation of the sealing material 450 a, and the effect of reducing the external force transmitted to the outer rib 414 b and the heat transfer plate 413 can be enjoyed. Therefore, when an external force is generated on the outer surface of the heat exchange element 406a, separation between the outer rib 414b and the heat transfer plate 413 is less likely to occur, and a heat exchange element capable of suppressing a decrease in ventilation can be obtained.

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

Here, the heat exchange type ventilator 402 according to the sixth embodiment and the heat exchange type ventilator according to the seventh embodiment are referred to as “heat exchange type ventilator”, and the exhaust flow 403 according to the sixth and seventh embodiments is referred to. The “exhaust flow” and the supply air flow 404 correspond to “a supply air flow” in the claims, and the heat exchange element 406 of the sixth embodiment and the heat exchange element 406a of the seventh embodiment correspond to the “heat exchange element” in the claims. In the sixth and seventh embodiments, the heat transfer plate 413 is a “partition member” in the claims, the rib 414 is a “spacing member” in the claims, and the outer rib 414b is a “spacing member located at the outermost periphery” in the claims. The heat exchange element piece 415 according to the sixth embodiment and the heat exchange element piece 415a according to the seventh embodiment correspond to “unit constituent members” in the claims. Furthermore, the exhaust air path 416 of the sixth and seventh embodiments is the “exhaust air path” of the claims, the supply air path 417 is the “supply air path” of the claims, the sealing material 450 of the sixth embodiment, and the embodiments. The seventh sealing material 450a corresponds to the “sealing member” of the claims, and the fiber members 440 of the sixth and seventh embodiments correspond to the “fiber members” of the claims.

As described above, the heat exchange elements according to Embodiments 6 and 7 are less likely to cause separation between the spacing member and the partition member, and can suppress a decrease in the ventilation rate. It is useful as a heat exchanging element used for such purposes.

(Embodiment 8)
Conventionally, as a structure of a heat exchange element used in this type of heat exchange type ventilation device, in order to secure reliability by improving sealability (a seal function for preventing air flowing through an air flow path from leaking outside). For example, the following structure is known (for example, refer to Patent Document 1).

FIG. 32 is an exploded perspective view showing the structure of a conventional heat exchange element 51.

As shown in FIG. 32, the conventional heat exchange element 51 is configured by laminating a large number of heat exchange elements 52 composed of functional paper 53 having heat conductivity and ribs 54. On one surface of the functional paper 53, a plurality of paper strings 55 and a plurality of ribs 54 made of a hot melt resin 56 for bonding the paper strings 55 to the functional paper 53 are provided in parallel at a predetermined interval. Due to the ribs 54, a gap is formed between a pair of functional papers 53 stacked vertically adjacent to each other to form an air flow path 57. The heat exchange element 51 is formed such that a plurality of gaps are stacked, and the air blowing directions of the air flow paths 57 in adjacent gaps are configured to be orthogonal to each other. Thereby, the supply air flow and the exhaust air flow alternately through the air flow path 57 for each functional paper 53, and heat exchange is performed between the air supply flow and the exhaust air flow.

Such a conventional heat exchange element 51 is formed by laminating a large number of heat exchange elements 52 each having a rib 54 formed by enclosing a substantially circular paper string 55 with a hot melt resin 56 on one surface of a functional paper 53. , And then compressed by laminating. However, the size of the rib 54 formed on the functional paper 53 may vary depending on the thickness of the paper string 55. That is, in the configuration of the conventional heat exchange element, the size (height) of the spacing member (for example, the above-described rib) varies, so that the spacing between the partition members (for example, the above-described functional paper) fluctuates. I will. Therefore, in the conventional heat exchange element, the heights of the exhaust air path and the supply air path (for example, the air flow path) are not stable, and the air flowing through the heat exchange element is biased, and the heat exchange efficiency is reduced. There is a problem that.

Therefore, the present disclosure is intended to solve the above-described conventional problems, and a method of manufacturing a heat exchange element capable of suppressing variation in height of an air path and suppressing a decrease in heat exchange efficiency, and a heat exchange element. The purpose is to provide.

In order to achieve this object, a method for manufacturing a heat exchange element according to the present disclosure is directed to a unit constituent member including a partition member having heat conductivity and a plurality of spacing members provided on one surface of the partition member. And a heat exchange element in which an exhaust airflow and an air supply airflow are alternately formed one layer at a time, and an exhaust flow flowing through the exhaust airflow and a supply airflow flowing through the air supply airflow exchange heat via a partition member. A first step of forming a plurality of spacing members on one surface of a partition member to form a unit constituent member, and laminating the unit constituent members alternately one by one and joining each other. A second step of forming a body, and a third step of forming an exhaust air path and an air supply air path having predetermined intervals in the stacking direction by compressing the stack in the stacking direction; A first interval holding member that forms an exhaust air passage or a supply air passage; A second spacing member having a height lower than the height of the first spacing member, wherein the second spacing member having higher rigidity than the first spacing member is used to form the spacing member; Is characterized in that the predetermined interval is defined based on the height of the second interval holding member, thereby achieving the intended purpose.

According to the present disclosure, it is possible to provide a method of manufacturing a heat exchange element and a heat exchange element that can suppress variations in height of an air path and suppress a decrease in heat exchange efficiency.

The method for manufacturing a heat exchange element according to the present disclosure is configured such that a unit member including a partition member having heat conductivity and a plurality of space holding members provided on one surface of the partition member is stacked to form an exhaust air passage and a supply air flow. A method for manufacturing a heat exchange element in which a path is alternately formed one layer at a time, and an exhaust flow flowing through an exhaust air path and a supply air flow flowing through an air supply path exchange heat through a partition member. A first step of forming a plurality of spacing members on one surface to form a unit constituent member, a second step of alternately stacking the unit constituent members one by one to form a laminate joined together, A third step of forming an exhaust air path and an air supply air path having a predetermined interval in the stack direction by compressing the body in the stack direction, and in the first step, the exhaust air path or the air supply air path is formed. A first spacing member to be configured and a height lower than the height of the first spacing member A second spacing member having a rigidity higher than that of the first spacing member, wherein the second spacing member has a rigidity higher than that of the first spacing member. It is defined based on the height of

According to such a method of manufacturing a heat exchange element, in the third step, the spacing between the partition members is defined by the second spacing member having higher rigidity than the first spacing member. For this reason, the unevenness (variation) of the spacing between the partition members due to the dimensional change of the spacing member is suppressed, and the bias of the air flowing through the heat exchange element is suppressed. As a result, it is possible to manufacture a heat exchange element in which a decrease in heat exchange efficiency is suppressed.

In the first step, the second spacing member may be formed at a position along the edge of the partition member. Thereby, in the third step, since the contact between the partition member and the second space holding member can be confirmed from the outside, it is possible to easily define the space between the partition members by the space between the second space holding members. it can.

Further, in the first step, an interval is formed by using a first interval holding member formed of an aggregate of a plurality of fiber members and a second interval holding member in which a plurality of fiber members are more densely assembled than the first interval holding member. It is good also as a structure in which a holding member is formed. Thereby, the pressure at the time of compressing the laminate in the third step can be easily set to a pressure at which the first spacing member is deformed and the second spacing member is not deformed. That is, the interval between the partition members can be easily defined by the interval between the second interval holding members.

Further, the heat exchange element according to the present disclosure is configured such that a unit member including a partition member having heat conductivity and a plurality of interval holding members provided on one surface of the partition member is stacked to form an exhaust air passage and an air supply air passage. Are alternately arranged one by one, and a heat exchange element for exchanging heat between an exhaust flow flowing through an exhaust air passage and an air supply flow flowing through an air supply air passage via a partition member, wherein the spacing member is disposed in a stacking direction. A first space holding member and a second space holding member located at an end of the partition member, the first space holding member having a first space holding member. The member is located on the inner side of the partition member from the second spacing member, and is configured to be wider than the second spacing member. The second spacing member has higher rigidity than the first spacing member, and the predetermined spacing is: It is defined based on the height of the second spacing member.

According to such a heat exchange element, the nonuniformity (variation) of the interval between the partition members due to the dimensional change of the interval holding member is suppressed, and the bias of the air flowing through the heat exchange element is suppressed. As a result, it is possible to provide a heat exchange element in which a decrease in heat exchange efficiency is suppressed.

First, with reference to FIG. 27 and FIG. 28, an outline of the heat exchange type ventilator 502 including the heat exchange element 506 according to the eighth embodiment of the present disclosure will be described. FIG. 27 is a schematic diagram illustrating an installation example of a heat exchange type ventilation device 502 including a heat exchange element 506. FIG. 28 is a schematic diagram showing the structure of the heat exchange type ventilation device 502.

に お い て In FIG. 27, a heat exchange type ventilator 502 is installed inside a house 501. The heat exchange type ventilation device 502 is a device that ventilates while exchanging heat between indoor air and outdoor air.

排 気 As shown in FIG. 27, the exhaust stream 503 is discharged outside through the heat exchange ventilator 502 as indicated by black arrows. The exhaust flow 503 is a flow of air discharged from indoors to outdoors. Further, the supply airflow 504 is taken into the room through the heat exchange type ventilation device 502 as indicated by a white arrow. The supply air flow 504 is a flow of air taken in from indoors to outdoors. For example, in winter in Japan, the exhaust stream 503 may be at 20 to 25 ° C., while the supply stream 504 may be below freezing. The heat exchange type ventilator 502 performs ventilation and transmits heat of the exhaust flow 503 to the supply air flow 504 during the ventilation, thereby suppressing unnecessary heat release.

As shown in FIG. 28, the heat exchange ventilator 502 includes a main body case 505, a heat exchange element 506, an exhaust fan 507, an inside air port 508, an exhaust port 509, an air supply fan 510, an outside air port 511, and an air supply port 512. ing. The main body case 505 is an outer frame of the heat exchange type ventilator 502. On the outer periphery of the main body case 505, an inside air port 508, an exhaust port 509, an outside air port 511, and an air supply port 512 are formed. The inside air port 508 is a suction port that sucks the exhaust gas flow 503 into the heat exchange ventilator 502. The exhaust port 509 is an outlet that discharges the exhaust stream 503 from the heat exchange ventilator 502 to the outside. The outside air port 511 is a suction port that sucks the supply airflow 504 into the heat exchange ventilator 502. The air supply port 512 is a discharge port that discharges the air supply flow 504 from the heat exchange ventilator 502 to the room.

熱 A heat exchange element 506, an exhaust fan 507, and an air supply fan 510 are mounted inside the main body case 505. The heat exchange element 506 is a member for performing heat exchange between the exhaust gas flow 503 and the supply air flow 504. The exhaust fan 507 is a blower for sucking the exhaust stream 503 from the inside air port 508 and discharging the exhaust stream 503 from the exhaust port 509. The air supply fan 510 is a blower for sucking the air supply flow 504 from the outside air port 511 and discharging it from the air supply port 512. By driving the exhaust fan 507, the exhaust stream 503 sucked from the inside air port 508 is discharged to the outside from the exhaust port 509 via the heat exchange element 506 and the exhaust fan 507. In addition, the air supply flow 504 sucked from the outside air port 511 by driving the air supply fan 510 is supplied to the room from the air supply port 512 via the heat exchange element 506 and the air supply fan 510.

Next, the heat exchange element 506 will be described with reference to FIGS. Note that the rib 514 includes a first rib 514a and a second rib 514b, but these are simply referred to as ribs 514 when it is not necessary to distinguish them.

FIG. 29 is an exploded perspective view showing the structure of the heat exchange element 506 used in the heat exchange ventilator 502. FIG. 30 is a partial cross-sectional view showing the structure of the rib 514 constituting the heat exchange element 506.

熱 As shown in FIG. 29, the heat exchange element 506 includes a plurality of heat exchange element pieces 515. Each heat exchange element piece 515 has a plurality of ribs 514 (first rib 514a, second rib 514b) bonded to one surface of a substantially square heat transfer plate 513. The heat exchange element 506 is formed by laminating a plurality of heat exchange element pieces 515 with the ribs 514 changed one by one in a stepwise manner so that the ribs 514 are orthogonal to each other. With such a configuration, an exhaust air passage 516 through which the exhaust air flow 503 flows and an air supply air passage 517 through which the air supply flow 504 flows are formed, and the exhaust air flow 503 and the air supply flow 504 alternately and orthogonally flow. To allow heat exchange between them.

The heat exchange element piece 515 is one unit constituting the heat exchange element 506. As described above, the heat exchange element piece 515 is formed by bonding the plurality of ribs 514 on one surface of the substantially square heat transfer plate 513. The rib 514 on the heat transfer plate 513 is formed so that its longitudinal direction is directed from one end of the heat transfer plate 513 to an end opposite thereto. Each of the ribs 514 is formed in a straight line. Each of the ribs 514 is arranged in parallel on the surface of the heat transfer plate 513 at a predetermined interval. Specifically, as shown in FIG. 29, a rib is provided on one surface of the heat transfer plate 513 constituting one of the two heat exchange element pieces 515 vertically adjacent to each other. The heat transfer plate 513 is formed by bonding such that the longitudinal direction of the heat transfer plate 513 extends from the end 513a to the opposite end 513c. On one surface of the heat transfer plate 513 constituting the other heat exchange element piece 515, the longitudinal direction of the rib 514 is located at an end 513b (perpendicular to the end 513a) of the heat transfer plate 513. Are formed so as to adhere to the opposite end 513d. In particular, a second rib 514b, which will be described later, is formed along an edge 513b and an edge 513d at an edge (outer edge) of the heat transfer plate 513 at the outermost position of the rib 514.

The heat transfer plate 513 is a thin sheet having a heat transfer property for exchanging heat when the exhaust flow 503 and the supply air flow 504 flow across the heat transfer plate 513, and has a property of preventing gas from permeating. Can be used. The heat transfer plate 513 is formed of a heat transfer paper based on cellulose fibers, has heat conductivity, moisture permeability, and moisture absorption, and can obtain the heat exchange element 506 that exchanges heat and moisture. However, the material of the heat transfer plate 513 is not limited to this. As the heat transfer plate 513, a heat exchange element 506 that exchanges only heat can be obtained by using, for example, a sheet made of metal such as aluminum or iron, or a sheet made of resin such as polyethylene or polypropylene. Further, by using a moisture-permeable resin membrane based on polyurethane or polyethylene terephthalate, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber, the heat exchange element 506 for exchanging moisture in addition to heat is used. Obtainable.

The plurality of ribs 514 are provided between a pair of opposed sides of the heat transfer plate 513, and are formed so as to extend from one side to the other side. The rib 514 is a member for forming a gap for passing the exhaust air flow 503 or the supply air flow 504 between the heat transfer plates 513 when the heat transfer plates 513 are stacked, that is, the exhaust air passage 516 or the supply air passage 517. . More specifically, as shown in FIG. 29, the plurality of ribs 514 are provided between a second rib 514b disposed along an edge (outer edge) of the heat transfer plate 513 and second ribs 514b at both ends. And a plurality of first ribs 514a located there. The second rib 514b is a rib formed along the edge 513b or the edge 513d on the outer edge of the heat transfer plate 513 that is the outermost position of the rib 514 among the plurality of ribs 514. The first rib 514a is a rib formed in a region between the second ribs 514b at both ends of the plurality of ribs 514.

断面 As shown in FIG. 30, each of the plurality of ribs 514 (the first rib 514a and the second rib 514b) has a substantially circular cross section. The rib 514 is constituted by a plurality of fiber members 540, and is fixed to the heat transfer plate 513 via an adhesive member 541. The rib 514 has an adhesive member 541 on the surface layer, and is configured by impregnating the adhesive member 541 into each minute gap between the fiber members 540.

As shown in FIG. 30, each of the fiber members 540 is a fiber member having a substantially circular cross section and extending in the same direction as the rib 514. As a material of the fiber member 540, it is sufficient that the material has a hygroscopic property and a certain strength. For example, a resin member such as polypropylene, polyethylene, polyethylene terephthalate, or polyamide, or a cellulose fiber, a ceramic fiber, or a glass fiber is used as a base material. Paper material, cotton, silk, and hemp can be used.

Next, a method for manufacturing the heat exchange element 506 according to Embodiment 8 will be described with reference to FIG. FIG. 31 is a diagram for describing a method of manufacturing the heat exchange element 506. Here, (a) to (c) of the same drawing show respective manufacturing steps of the heat exchange element 506. That is, (a) shows a first step of forming the heat exchange element piece 515. (B) shows a second step in which the heat exchange element pieces 515 are stacked to form a stacked body 506a. (C) shows a third step of forming the heat exchange element by compressing the stacked body 506a in the stacking direction. Hereinafter, the contents of each step will be specifically described. First, as shown in (a), a plurality of ribs 514 (first ribs 514a and second ribs 514b) are arranged at predetermined positions on one surface of the heat transfer plate 513 as a first step. The rib 514 and the heat transfer plate 513 are fixed to each other by thermal welding of the adhesive member 541. Here, as the plurality of ribs 514, a first rib 514a constituting an air passage of the heat exchange element 506, and a second rib which is thinner than the thickness of the first rib 514a and higher in rigidity than the first rib 514a. 514b. That is, a material having a height H2 lower than the height H1 of the first rib 514a and having a higher rigidity than the first rib 514a is used for the second rib 514b. In the first step, at least such a second rib 514b is arranged along the edge (outer edge) of the heat transfer plate 513 which is the outermost position of the rib 514 to form the heat exchange element piece 515.

The rigidity of the rib 514 is controlled by the density of the aggregate of the plurality of fiber members 540. For example, when using a fiber material formed by twisting a thin wire made of a polypropylene resin, the number of twists per unit length of the second rib 514b is increased with respect to the number of twists per unit length of the first rib 514a. Thus, the second ribs 514b have a plurality of fiber members gathered more densely than the first ribs 514a, and the rigidity of the second ribs 514b is higher than that of the first ribs 514a.

Next, as shown in (b), a plurality of heat exchange element pieces 515 are stacked in different directions so that the ribs 514 are alternately arranged one by one in the vertical direction, as shown in FIG. A stacked body 506a which is a precursor of the exchange element 506 is formed. Here, in the stacked body 506a, the heat transfer plate 513 and the rib 514, which constitute another heat exchange element piece 515, are formed in contact with the first rib 514a. That is, at this stage, among the vertically adjacent heat exchange element pieces 515, the first rib 514a of the lower heat exchange element piece 515 is in contact with the heat transfer plate 513 of the upper heat exchange element piece 515. And the second rib 514b are not in contact with each other.

Next, as a third step, as shown in (c), the laminate 506a is compressed in the laminating direction (vertical direction) of the heat exchange element pieces 515, so that a predetermined interval (of the second rib 514b) is formed in the laminating direction. An air passage (exhaust air passage 516, supply air passage 517) having a height H2 is formed to form the heat exchange element 506. At this time, the pressure at which the laminate 506a is compressed is set to a pressure at which the first rib 514a is deformed and the second rib 514b is not deformed. The compression in the stacking direction is performed until the upper surface of the second rib 514b comes into contact with the heat transfer plate 513 forming another heat exchange element piece 515 stacked thereon.

In the third step, the pressure for compressing the stacked body 506a is set to a pressure at which the first rib 514a is deformed and the second rib 514b is not deformed. H2) defines the interval between the heat transfer plates 513. On the other hand, the first ribs 514a formed higher than the heights of the second ribs 514b are crushed and deformed by the pressure when compressing the stacked body 506a. Therefore, even if the thickness (height) of the plurality of first ribs 514a varies, the variation is absorbed by the height H2 of the second ribs 514b. Note that the first rib 514a is crushed during compression and is formed wider than the second rib 514b.

As described above, according to the method of manufacturing a heat exchange element according to Embodiment 8, in the third step of forming heat exchange element 506 by compressing laminate 506a in the stacking direction, the rigidity is higher than that of first rib 514a. Since the distance between the heat transfer plates 513 is defined by the second ribs 514b, the unevenness (variation) of the distance between the heat transfer plates 513 due to the dimensional change of the first ribs 514a is suppressed, and the air flowing through the heat exchange element 506 is reduced. Is suppressed. As a result, it is possible to manufacture the heat exchange element 506 in which a decrease in the heat exchange efficiency is suppressed.

Further, in the third step, it can be confirmed from the outside that the heat transfer plate 513 and the second rib 514b constituting another heat exchange element piece 515 are in contact with each other, so that the interval (height) of the second rib 514b can be confirmed. By H2), the interval between the heat transfer plates 513 can be easily defined. In particular, it is possible to make fine adjustments to predetermined intervals visually, thereby suppressing excessive compression of the second ribs 514b and suppressing the air passage area of the exhaust air passage 516 or the supply air passage 517 from becoming unnecessarily small. Therefore, it is preferable.

As described above, the present disclosure has been described based on the eighth embodiment, but the present disclosure is not limited to the above-described eighth embodiment, and various improvements and modifications can be made without departing from the gist of the present disclosure. That can be easily inferred.

In the method for manufacturing a heat exchange element according to the eighth embodiment, the second ribs 514b are selectively arranged on the edge (outer edge) of the heat transfer plate 513, but the present invention is not limited to this. For example, a configuration in which a portion where the first rib 514a is arranged in FIG. 29 may be partially replaced with a second rib 514b may be employed.

In the method for manufacturing a heat exchange element according to the eighth embodiment, the ribs 514 (the first ribs 514a and the second ribs 514b) are substantially cylindrical members, but the cross-sectional shape is not limited to the substantially cylindrical shape. Instead, the shape may be rectangular or hexagonal.

In the method for manufacturing a heat exchange element according to the eighth embodiment, as a means for providing a difference in rigidity between the first rib 514a and the second rib 514b, a means based on the density of the fiber member 540 is used. However, it is not limited to this. For example, the first rib 514a may be formed of a paper material using cellulose fiber, and the second rib 514b may be formed of a resin wire material using a polypropylene resin, depending on the material of the rib 514.

Regarding the terms used above, the heat transfer plate 513 of the eighth embodiment is a “partition member” in the claims, the rib 514 is a “spacing member” in the claims, and the first rib 514a is a “first spacing” in the claims. The “holding member” and the second rib 514b correspond to a “second interval holding member” in the claims. In addition, the heat exchange element piece 515 corresponds to a “unit constituent member”, the laminate 506a corresponds to a “laminate”, and the heat exchange element 506 corresponds to a “heat exchange element”. The exhaust air path 516 corresponds to an “exhaust air path” in the claims, and the supply air path 517 corresponds to a “supply air path” in the claims.

As described above, the heat exchange element manufactured by the method for manufacturing a heat exchange element according to the eighth embodiment can maintain high heat exchange efficiency by suppressing the bias of the wind caused by the dimensional variation of the rib due to the manufacture. Therefore, it is useful as a heat exchange element used for a heat exchange type ventilator or the like.

As described above, the heat exchange element according to the present embodiment prevents the fibers at the end face of the spacing member from fraying, improves the strength, and is useful as a heat exchange element used in a heat exchange type ventilation device or the like. is there.

DESCRIPTION OF SYMBOLS 101 House 102 Heat exchange type ventilator 103 Exhaust flow 104 Supply air flow 105 Main case 106 Heat exchange element 106a Heat exchange element 107 Exhaust fan 108 Inside air port 109 Exhaust port 110 Air supply fan 111 Outside air port 112 Air supply port 113 Heat transfer plate 113a End side 113b End side 113c End side 113d End side 114 Rib 115 Heat exchange element piece 115a Heat exchange element piece 116 Exhaust air path 117 Supply air path 130 Protective layer 140 Textile member 141 Adhesive member 201 House 202 Heat exchange ventilator 203 Exhaust Flow 204 Supply air flow 205 Body case 206 Heat exchange element 207 Exhaust fan 208 Inside air port 209 Exhaust port 210 Air supply fan 211 Outside air port 212 Air supply port 213 Heat transfer plate 213a Edge 213b Edge 213c Edge 13d End side 214 Rib 214a Rib 215 Heat exchange element piece 216 Exhaust air path 217 Supply air path 240 Textile member 241 Adhesive member 242 First adhesive area 243 Second adhesive area 301 House 302 Heat exchange ventilator 303 Exhaust flow 304 Supply air flow 305 Body case 306 Heat exchange element 307 Exhaust fan 308 Inside air port 309 Exhaust port 310 Air supply fan 311 Outside air port 312 Air supply port 313 Heat transfer plate 313a Edge 313b Edge 313c Edge 313d Edge 314 Rib 314b Air path rib 314a Heat melting rib 315 Heat exchange element piece 316 Exhaust air path 317 Supply air path 352, 352a Rib joint 401 House 402 Heat exchange ventilator 403 Exhaust flow 404 Supply air 405 Body case 406, 406a Heat exchange element Child 407 Exhaust fan 408 Inside air port 409 Exhaust port 410 Air supply fan 411 Outside air port 412 Air supply port 413 Heat transfer plate 413a Edge 413b Edge 413c Edge 413d Edge 414 Rib 414a Inner rib 414a Outer rib 415a Element piece 416 Exhaust air path 417 Air supply air path 440 Fiber member 441 Adhesive member 450, 450a Sealing material 501 House 502 Heat exchange type ventilator 503 Exhaust flow 504 Supply air flow 505 Body case 506 Heat exchange element 506a Stack 507 Exhaust fan 508 Inside air port 509 Exhaust port 510 Air supply fan 511 Outside air port 512 Air supply port 513 Heat transfer plate 513a Edge 513b Edge 513c Edge 513d Edge 514 rib 514a First rib 514b Second rib 515 Heat exchange Element piece 516 Exhaust air path 517 Supply air path 540 Fiber member 541 Adhesive member 11 Heat exchange element 12 Heat exchange element only 13 Functional paper 14 Rib 15 Paper cord 16 Hot melt resin 17 Air flow path 21 Heat exchange element 22 Heat exchange element 23 Functional Paper 24 Rib 25 Paper String 26 Hot Melt Resin 27 Air Flow Path 31 Heat Exchange Element 32 Heat Exchange Element Single 33 Functional Paper 34 Rib 35 Paper String 36 Hot Melt Resin 37 Air Flow Path 41 Heat Exchange Element 42 Heat Exchange Element Single 43 Functional paper 44 Rib 45 Paper string 46 Hot melt resin 47 Air flow path 51 Heat exchange element 52 Heat exchange element alone 53 Functional paper 54 Rib 55 Paper string 56 Hot melt resin 57 Air flow path

Claims (4)

A unit member including a partition member having heat conductivity and a plurality of spacing members provided in parallel on one surface of the partition member is laminated to alternately form an exhaust air path and an air supply air path one by one. A heat exchange element that exchanges heat between the exhaust air flowing through the exhaust air passage and the supply air flowing through the supply air passage via the partition member,
The spacing member is constituted by a plurality of fiber members having a hygroscopic property,
A heat exchange element, comprising: a protection member that covers an end surface of the spacing member. 熱 The heat exchange element according to claim 1, wherein the protection member is provided so as to protrude outward from an end surface of the partition member. The heat exchange element according to claim 2, wherein the protection member further covers an end surface of the partition member. (4) A heat exchange type ventilator, comprising the heat exchange element according to any one of (1) to (3).

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