JP6537760B1 - Heat exchange element and heat exchange ventilator - Google Patents

Abstract

The heat exchange element includes a central flow passage member in which a plurality of flow passage plates are stacked, and a first side flow passage member and a second side flow passage member joined to both sides of the central flow passage member. And a flow path between the flow path plates adjacent in the stacking direction is alternately formed in the flow path through which the first fluid and the second fluid flow, and the first fluid and the second fluid exchange heat via the flow path plate A heat exchange element, in which a cutaway portion for blocking a part of the flow path is formed at an edge portion of the stacked flow path plate in the planar direction of the flow path plate, and an airtight process is formed on the surface of the cutaway portion Will be applied.

Description

  According to the present invention, the first fluid and the second fluid are alternately formed between the flow channel plates adjacent to each other in the stacking direction, and the first fluid and the second fluid are formed via the flow channel plate. The present invention relates to a heat exchange element that exchanges heat and a heat exchange ventilator.

  In recent years, a heat exchange ventilation system for ventilating the room has been adopted from the viewpoint of energy saving. The heat exchange ventilator is an apparatus that exchanges the temperature and humidity of the room air, that is, the total heat and the temperature and humidity outside the room, that is, the total heat, through the heat exchange element. In order to reduce the loss of heat associated with ventilation, the heat exchange element employs a moisture permeable paper member. Further, in order to increase the heat exchange efficiency, a counterflow type heat exchange element is employed in which the air supply and the exhaust flow oppositely in the heat exchange element.

  For example, as disclosed in Patent Document 1, the counterflow-type heat exchange element is manufactured using a heat transfer body in which a flow path plate and a spacing plate are joined. The flow path plate is made of paper or the like separating two fluids to be heat-exchanged, and a plurality of the flow path plates are stacked. The spacer plate is made of, for example, a paper material forming a plurality of parallel flow paths between adjacent flow path plates. The heat transfer body is a central flow path member which is an opposing flow path portion obtained by cutting the heat transfer body into a square, a first side flow path member connected to one end of the central flow path member, and the other end And a second side channel member connected to the In addition, the heat transfer body comprises a first bonding tape for sealing the bonding portion between the central flow passage member and the first side flow passage member in one turn on the surface, the central flow passage member and the second side flow passage And a second bonding tape for sealing the bonding portion with the member in one turn on the surface. Further, in the heat exchange element, the joining portion between the central flow passage member and each of the first side flow passage member and the second side flow passage member is subjected to an airtight process.

International Publication No. 2016/147359

  The flow path plate which comprises a heat exchange element may be comprised with flexible materials, such as paper material. When laminating a flexible flow path plate such as a paper material, the flow path plate is easily warped. Therefore, after the flow path plate and the space plate are bonded, peeling off occurs from the end of the heat exchange element due to the force of warpage of the flow path plate due to aged deterioration. When peeling occurs, mixing of the two fluids occurs in the structure of the heat exchange element and the two fluid flow paths flowing therethrough.

  In the technique of Patent Document 1, the joining portion between the central flow passage member and the first side flow passage member and the second side flow passage member is airtightly treated. However, peeling occurs at the end of the bonding portion between the central flow passage member and the first side flow passage member or the second side flow passage member due to a decrease in the adhesion between the layers due to use over time. At the exfoliated end, the flow widths of the two fluids deviate, causing the problem of mixing of the two fluids. In the technique of Patent Document 1, when the end of the joint between the central flow passage member and the first side flow passage member or the second side flow passage member is peeled off, measures to prevent mixing of the two fluids are performed. It is not taken measures.

  This invention is for solving the said subject, and when peeling arises in the edge part of the junction part of a center flow path member, and the 1st side flow path member or the 2nd side flow path member each. It is an object of the present invention to provide a heat exchange element and a heat exchange ventilator capable of reliably preventing the mixing of two fluids.

  The heat exchange element according to the present invention comprises a central flow passage member in which a plurality of flow passage plates are stacked, and a first side flow passage member and a second side flow passage joined respectively on both sides of the central flow passage member. A member, and the flow path plates adjacent to each other in the stacking direction are alternately formed in a flow path through which the first fluid and the second fluid flow, and the first fluid and the flow path plate It is a heat exchange element which exchanges heat with the second fluid, and a notch for blocking a part of the flow passage is formed at the edge of the flow passage plate stacked in the planar direction of the flow passage plate. The surface of the notched portion is subjected to an airtight process.

  The heat exchange ventilator according to the present invention is provided with the above-described heat exchange element, and performs heat exchange while ventilating the indoor and outdoor air.

  According to the heat exchange element and the heat exchange ventilator according to the present invention, the cutaway portion for blocking a part of the flow passage is formed at the edge of the stacked flow passage plate in the planar direction of the flow passage plate. An airtight process is applied to the surface of the notch. As a result, at the end of the joint between the central flow passage member and the first side flow passage member and the second side flow passage member, the flow passage of the two fluid flows in the notched portion and the airtight process. It is shut off beforehand. Therefore, when peeling occurs at the end of the joint between the central flow passage member and the first side flow passage member or the second side flow passage member, the mixing of the two fluids can be reliably prevented.

It is explanatory drawing which shows the example of installation of a heat exchange ventilator provided with the heat exchange element which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the heat exchange ventilator provided with the heat exchange element which concerns on Embodiment 1 of this invention. It is a perspective view which shows the heat exchange element which concerns on Embodiment 1 of this invention. It is a front view which shows the heat exchange element which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the heat-transfer body of the heat exchange element which concerns on Embodiment 1 of this invention. It is an enlarged perspective view which shows the notch part formed in the heat exchange element which concerns on Embodiment 1 of this invention. It is an enlarged perspective view which shows the state which performed the airtight process to the notch part formed in the heat exchange element which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the flow of the 1st fluid in the single-piece | unit of the heat transfer body which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the flow of the 2nd fluid in the single-piece | unit of the heat transfer body which concerns on Embodiment 1 of this invention. It is sectional drawing in the AA line of FIG. 4 which shows the flow of the 1st fluid in the heat exchange element which concerns on Embodiment 1 of this invention, and a 2nd fluid. It is a perspective view which shows the heat exchange element of a prior art example. It is explanatory drawing which shows the mode of the failure | damage of the flow path in the heat exchange element of a prior art example. It is a perspective view which shows the heat exchange element which concerns on the modification 1 of Embodiment 1 of this invention. It is a perspective view which shows the heat exchange element which concerns on the modification 2 of Embodiment 1 of this invention. It is a perspective view which shows the heat exchange element which concerns on the modification 3 of Embodiment 1 of this invention. It is a perspective view which shows the heat exchange element which concerns on the modification 4 of Embodiment 1 of this invention. FIG. 17 is a bottom view showing the heat exchange element according to the fourth modification of the first embodiment of the present invention as viewed in the direction of arrow C in FIG. It is a perspective view which shows the heat exchange element which concerns on the modification 5 of Embodiment 1 of this invention.

  Hereinafter, embodiments of the present invention will be described based on the drawings. In the drawings, the same reference numerals denote the same or corresponding parts, which are common to the whole text of the specification. Further, in the drawing of the cross-sectional view, hatching is appropriately omitted in view of visibility. Furthermore, the form of the component shown in the specification full text is an illustration to the last, and is not limited to these descriptions.

Embodiment 1
<Installation Example of Heat Exchange Ventilation System>
FIG. 1: is explanatory drawing which shows the example of installation of the heat exchange ventilator 20 provided with the heat exchange element 14 which concerns on Embodiment 1 of this invention. As shown in FIG. 1, the heat exchange ventilator 20 includes a heat exchange element 14 and performs heat exchange while ventilating air between the indoor I and the outdoor O.

  The heat exchange ventilator 20 is a type of air conditioner. The heat exchange ventilator 20 has a ventilation function of supplying air from outside O to room I and exhausting air from inside I to outside O. In addition to the ventilation function, the heat exchange ventilator 20 reduces the energy burden of the device for adjusting the room temperature such as an air conditioner by recovering the heat from the exhaust air and giving the heat to the intake air. It also has a heat exchange function.

  The heat exchange ventilator 20 is housed in the ceiling of the room I. From the point of view of the indoor beauty, there are many houses that collectively store the air conditioner including the heat exchange ventilator 20 in the ceiling. When installing the air conditioner in the ceiling, a wider installation space for the air conditioner can be secured as compared with the case where the air conditioner is generally installed in the room I.

  An outdoor intake port 29 for taking in air from the outdoor O is formed on the outdoor wall surface. An outdoor exhaust port 30 for discharging air to the outdoor O is formed on the outdoor wall surface. On the other hand, on the ceiling of the room I, an indoor air supply port 31 for allowing air to flow into the room I is formed. In the ceiling of the room I, an indoor exhaust port 32 for discharging the air of the room I is formed.

  As shown in FIG. 2 described later, the outdoor air inlet 29 is connected to the outdoor air duct 25. The indoor air supply port 31 is connected to the air supply duct 26. The indoor exhaust port 32 is connected to the return air duct 27. The outdoor exhaust port 30 is connected to the exhaust duct 28.

<Operation of Heat Exchange Ventilation System 20>
FIG. 2: is explanatory drawing which shows the heat exchange ventilator 20 provided with the heat exchange element 14 which concerns on Embodiment 1 of this invention. As shown in FIG. 2, the heat exchange element 14 is mounted in the heat exchange ventilator 20. In the heat exchange ventilator 20, heat exchange is carried out by the air inside and outside the room passing through the heat exchange element.

  Inside the heat exchange ventilator 20, an air supply fan 22 for blowing air from the outside O to the inside I is provided. Inside the heat exchange ventilator 20, an exhaust fan 21 for blowing air from the room I to the outside O is provided. By operating the air supply fan 22 and the exhaust fan 21, air supply and discharge to the room I are performed.

  As described later, the heat exchange element 14 is formed with an inlet 15 and an outlet 16 for the first fluid 10. The heat exchange element 14 is formed with an inlet 17 and an outlet 18 for the second fluid 11. And when the heat exchange element 14 is mounted in the heat exchange ventilator 20, the inflow port 15 of the 1st fluid 10 is connected with the external air duct 25 which takes in external air. An outlet 16 of the first fluid 10 is connected to an air supply duct 26 for supplying air to the room I. An inlet 17 of the second fluid 11 is connected to a return air duct 27 for passing the indoor exhaust. The outlet 18 of the second fluid 11 is connected to an exhaust duct 28 for exhausting air to the outside O.

  The air outside O is taken in from the outside air duct 25 by the operation of the air supply fan 22, is supplied to the air supply fan 22 via the heat exchange element 14, and is supplied to the room I as air supply from the air supply duct 26. Introduced to On the other hand, air in the room I is taken in from the return air duct 27 by the operation of the exhaust fan 21, exhausted by the exhaust fan 21 through the heat exchange element 14, and exhausted to the outside O as exhaust air from the exhaust duct 28. Be done. The charge air flow and the exhaust gas flow are opposed to each other at the portion of the central flow path member 5 of the heat exchange element 14, so that the heat exchange between the charge air flow and the exhaust gas is totally carried out, and heat exchange is efficiently performed.

<Configuration of Heat Exchanger Element 14>
FIG. 3 is a perspective view showing the heat exchange element 14 according to the first embodiment of the present invention. FIG. 4 is a front view showing the heat exchange element 14 according to Embodiment 1 of the present invention. In FIG. 3, the front direction F is directed upward in the drawing. In the following drawings, a front direction F, a back direction B, a left direction L, a right direction R, an upper direction U, and a lower direction D are shown.

  As shown in FIGS. 3 and 4, the heat exchange element 14 includes the central flow passage member 5 in which the plurality of flow passage plates 1 are stacked, and a first side flow joined to both sides of the central flow passage member 5. A channel member 6 and a second side channel member 7; In the first side flow passage member 6 and the second side flow passage member 7, a plurality of flow passage plates 1 are stacked. Each of the central flow passage member 5, the first side flow passage member 6, and the second side flow passage member 7 is configured as the heat transfer body 3.

  The heat transfer body 3 is manufactured by joining the flow path plate 1 and the spacing plate 2 as shown in FIG. 5 described later. The flow path plate 1 divides the heat exchange between the first fluid 10 and the second fluid 11, and a plurality of the flow plates 1 are stacked. The spacing plate 2 constitutes a plurality of parallel flow paths between the flow path plates 1 adjacent to each other. The spacer plate 2 plays the role of maintaining the gap width between the adjacent flow channel plates 1. The heat exchange element 14 is formed in a flow path through which the first fluid 10 and the second fluid 11 flow alternately between the flow path plates 1 adjacent in the stacking direction, and the first fluid via the flow path plate 1 10 and the second fluid 11 exchange heat.

  The central flow passage member 5 is formed by cutting the heat transfer body 3 into a square. Each of the first side flow passage member 6 and the second side flow passage member 7 is formed by cutting the heat transfer body 3 into a triangle. The first side flow path member 6 is joined to the left end portion of the central flow path member 5. The second side flow path member 7 is joined to the end of the central flow path member 5 in the right direction R. The flow passage plate 1 of the central flow passage member 5 is joined to the flow passage plate 1 of each of the first side flow passage member 6 and the second side flow passage member 7 in one plane.

  A first bonding tape 8 is provided at a junction where the central flow passage member 5 and the first side flow passage member 6 are joined. A second bonding tape 9 is provided at a junction where the central flow passage member 5 and the second side flow passage member 7 are joined. The first bonding tape 8 and the second bonding tape 9 are tape materials having an adhesive surface on one side and an outer surface on the other side. The bonding surface of the first bonding tape 8 and the second bonding tape 9 is attached to the bonding portion.

  The first bonding tape 8 is in contact with the end of the central flow path member 5 and the end of the first side flow path member 6 and is joined in a circle around both of the abutting end faces. Since the central flow path member 5 and the first side flow path member 6 have the same number of flow path plates 1 stacked and have the same end face, the circumference of the end faces which both contact with each other by the first bonding tape 8 It is joined by pasting around. Thus, the central flow path member 5 and the first side flow path member 6 are in a state where the flow path plates 1 stacked at equal intervals are combined.

  In the second bonding tape 9, the end of the central flow path member 5 and the end of the second side flow path member 7 are in contact with each other, and are joined around the two end faces in contact. Since the central flow path member 5 and the second side flow path member 7 have the same number of flow path plates 1 stacked and have the same end face, the second bonding tape 9 wraps around the end faces that are in contact with each other. It is joined by pasting around. Thus, the central flow path member 5 and the second side flow path member 7 are in a state where the flow path plates 1 stacked at equal intervals are combined.

  In the central flow channel member 5, the bonding angle of the inner spacer plate 2 has the bonding angle of the spacer plate 2 parallel to the first side channel member 6 and the second side channel member 7. In the first side flow passage member 6 and the second side flow passage member 7, the pasting angle of the spacer plate 2 inside is inclined in parallel. Further, in the flow passage through which the first fluid 10 flows and the flow passage through which the second fluid 11 flows, the attachment of the spacer plate 2 inside the first side passage member 6 and the second side passage member 7 The mounting angle is axisymmetrical to the straight line between the first side flow passage member 6 and the second side flow passage member 7.

  A space is formed by supporting the space plate 2 between the adjacent flow path plates 1. And the flow path plate 1 is laminated | stacked via the spacer plate 2, and the space which 1st fluid 10 and 2nd fluid 11 distribute | circulate alternately is laminated | stacked, and is formed. A space in which the first fluid 10 and the second fluid 11 flow alternately exists in such a manner as to be stacked with the flow path plate 1 interposed therebetween, and the flow path plate in which the first fluid 10 and the second fluid 11 are sandwiched. Heat exchange is possible by 1.

  An inlet / outlet for the first fluid 10 and the second fluid 11 is formed on the opposite side of the first side flow passage member 6 and the second side flow passage member 7. Thereby, as shown in FIG. 3, the heat exchange element 14 is provided with the inlet 15 for the first fluid 10, the outlet 16 for the first fluid 10, the inlet 17 for the second fluid 11, and the second fluid. 11 outlets 18 are formed.

<Notch 33>
In the heat exchange element 14, at the edge portion of the flow path plate 1 stacked in the planar direction of the flow path plate 1, a notch portion 33 which blocks a part of the flow path is formed. The notch 33 is formed at the edge of the central flow passage member 5. The notches 33 are formed one by one at opposing edge portions of the flow path plate 1 stacked in the planar direction of the flow path plate 1. The notches 33 formed one each in the pair of edges have the same shape. One notch 33 is formed to penetrate all of the stacked flow path plates 1. One notch 33 is formed along the stacking direction of the flow path plate 1 orthogonal to the planar direction of the flow path plate 1. The width in the plane direction of the flow channel plate 1 in one notch portion 33 is wider toward the central portion of the flow channel plate 1. That is, one notch 33 is formed in a so-called dovetail groove. As shown in FIG. 13 described later, one rail member 34 may be inserted into one notch 33.

<Heat transfer body 3>
FIG. 5 is an explanatory view showing the heat transfer body 3 of the heat exchange element 14 according to Embodiment 1 of the present invention. As shown in FIG. 5, a single body of the heat transfer body 3 is configured of one flow passage plate 1 and one spacing plate 2. The heat transfer body 3 exchanges heat between all the heats of the first fluid 10 and the second fluid 11 while separating the first fluid 10 and the second fluid 11 facing both surfaces of the flow path plate 1.
The flow path plate 1 is made of thin paper or the like. The spacer plate 2 is made of cardboard or the like having a corrugated plate shape to hold the stacked flow channel plates 1 in parallel. A space surrounded by the flow path plate 1 and the space plate 2 is made the first fluid 10 or the second fluid by being joined and stacked so that the wavelike peak portion of the space plate 2 and the flow path plate 1 are in contact with each other. The heat transfer body 3 formed in the flow path of 11 is comprised.

  The flow path plate 1 is formed of a material having heat conductivity and moisture permeability, or a material such as thin paper having only heat conductivity. The spacer plate 2 is preferably formed of a material having a shape-retaining ability that can be deformed by bending or the like to retain the structure, and can maintain the shape of the spacer plate 2 itself. Further, when the thickness of the spacer plate 2 is increased, the spacer plate 2 blocks the flow path, leading to an increase in pressure loss. Therefore, it is preferable that the film thickness of the spacer plate 2 be smaller.

  The flow path plate 1 and the spacing plate 2 are made of a paper material such as a pulp material made of cellulose or the like which satisfies such properties. However, when importance is placed only on heat transfer, the flow channel plate 1 and the spacer plate 2 may be made of a resin thin film or a metal thin film. Specific examples of the metal are aluminum, iron or stainless steel. The spacer plate 2 has a substantially corrugated shape so as to be sandwiched between the plurality of flow path plates 1 after lamination while forming a gap therebetween. The substantially wave shape of the space plate 2 can be processed into a substantially wave shape by sandwiching the flat plate-like original plate of the space plate 2 using a corrugated machine or a rack and a pinion or the like.

  The flat flow path plate 1 is joined to the ridge portion of the spacer plate 2 having a substantially wave shape by an adhesive or the like, and constitutes a single piece of the corrugated heat transfer body 3. The bonding of the flow channel plate 1 and the spacer plate 2 also has an effect of maintaining the flow channel plate 1 with low rigidity on a flat surface. The single body of the heat transfer body 3 has all the ends of one flow path plate 1 and one substantially wave-like space plate 2 coincident with each other, and the space plate 2 is joined to the entire flow path plate 1. Here, the adhesive used for bonding includes a fluid-like sticky member or a filler in the case of dissolving and bonding the filler in welding.

  In addition, the structure of the heat-transfer body 3 does not need to be comprised by each one of the flow-path plate 1 and the spacing plate 2 each. For example, the entire heat transfer body 3 may be manufactured by resin molding. Further, the bonding between the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7 may not be performed by the first bonding tape 8 or the second bonding tape 9. For example, the central flow passage member 5, the first side flow passage member 6, and the second side flow passage member 7 may be integrally molded.

<Details of Notch 33>
FIG. 6 is an enlarged perspective view showing the notch 33 formed in the heat exchange element 14 according to the first embodiment of the present invention. FIG. 7 is an enlarged perspective view showing a state in which the airtight portion 13 is applied to the notch 33 formed in the heat exchange element 14 according to the first embodiment of the present invention. As shown in FIGS. 6 and 7, the notch 33 is formed after the heat transfer body 3 is completed. And the airtight process 13 is given to the surface of the notch 33. The airtight process 13 may be applied using an airtight process agent having viscosity. Further, the airtight process 13 may be applied using a thermally foamable airtight process agent.

  As shown in FIG. 6, in the central flow path member 5, the upper layer from the front direction F to the lower layer in the back direction B is a direction crossing the stacked flow paths in which the first fluid 10 and the second fluid 11 flow in parallel. The notch 33 is formed continuously over the entire length. The notch 33 has a dovetail shape in which the width between the left side L and the right side R in the flow direction is wider toward the center.

  As shown in FIG. 7, the notch 33 is subjected to an airtight process 13. Here, the airtight process 13 is applied using an airtight process agent. The airtight processing agent may, for example, be a urethane, acrylic or silicone sealant. The sealant may be applied only to the surface of the notch 33. However, desirably, the sealant has viscosity and is pressed after application to fill the gap between adjacent flow path plates 1. In addition, the airtight processing agent is not limited to the above. For example, the airtight processing agent may apply a heat after application using a paint or the like containing a foaming agent to perform a foaming process to fill the gap between adjacent flow path plates 1. Examples of the foaming agent include thermally expandable hollow elastic microspheres, an inorganic foaming agent, a nitroso-based foaming agent, an azo-based foaming agent and a sulfonyl hydrazide-based foaming agent.

  The airtight process 13 is a process in which an airtight process agent is applied to the cross section of the flow path and the flow path between the adjacent flow path plates 1 is blocked. The airtight process 13 is performed on the notch 33 to shut off the flow path included in the notch 33. At the end of the joint between the central flow passage member 5 and each of the first side flow passage member 6 and the second side flow passage member 7, a flow passage blocked in advance by the notch 33 is formed. . Therefore, even when the end of the joint between the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7 is peeled off, the flow passage of the peeled end is notched. Since the flow path is blocked by the airtight process 13 applied to the surface of the portion 33 and the notch 33, the mixing of the first fluid 10 and the second fluid 11 can be reliably prevented.

  A plurality of notches 33 may be provided. However, at least one notch 33 is provided at one edge of the central flow passage member 5. Further, the airtight processing 13 is applied to all the notches 33.

  The notch part 33 may be cut off by the cutting process using a saw, a water cutter, etc., after the heat transfer body 3 by which the several flow-path plate 1 was laminated | stacked is comprised. However, it is not limited to this. For example, each layer of the single heat transfer body 3 composed of the flow path plate 1 before lamination or one flow path plate 1 and one spacing plate 2 is cut by a cutter or a cutting process by Thomson and then laminated. You may. The positions of the notches 33 of the respective layers are formed at the same position as viewed from the front direction F of the heat exchange element 14 regardless of any process, and are aligned in the stacking direction of the flow path plate 1.

<Operation of Heat Exchanger Element 14>
FIG. 8 is an explanatory view showing the flow of the first fluid 10 in a single body of the heat transfer body 3 according to Embodiment 1 of the present invention. FIG. 9 is an explanatory view showing the flow of the second fluid 11 in a single body of the heat transfer body 3 according to Embodiment 1 of the present invention. FIG. 10 is a cross-sectional view taken along line AA of FIG. 4 showing the flow of the first fluid 10 and the second fluid 11 in the heat exchange element 14 according to the first embodiment of the present invention.

  As shown in FIG. 3, when stacking a plurality of flow channel plates 1, adjacent flow channel plates 1 are alternately bonded via the spacer plates 2 and stacked. Thus, the space plate 2 is sandwiched between one flow passage plate 1 and the adjacent flow passage plate 1 to form a space serving as a flow passage. As shown in FIG. 8, a single heat transfer body 3 flows in from the first side flow passage member 6, passes through the central flow passage member 5, and leads to the second side flow passage member 7. A first flow path of fluid 10 is formed. On the other hand, as shown in FIG. 9, the second side flow path member 7 flows into the single body of the heat transfer body 3 sandwiching the flow path plate 1 with respect to the first flow path, and the central flow path member 5 is A second flow path of the second fluid 11 leading to the first side flow path member 6 is formed.

  By alternately flowing the first fluid 10 and the second fluid 11 which exchange heat in the first flow path and the second flow path in each layer, heat exchange is performed for each adjacent layer through the flow path plate 1. The heat exchange element 14 causes the air outside the room O and the air inside the room I to flow inside for heat exchange. When heat exchange is performed, the heat exchange element 14 is formed with a first flow path for taking the air of the outdoor O into the room I and a second flow path for drawing the air of the room I to the outdoor O. A first fluid 10, which is air flowing from the outside O, flows through the first flow passage. A second fluid 11 which is air flowing out of the room I flows through the second flow path.

  The first fluid 10 passes from the inflow port 15 through the first flow path in the first side flow path member 6 to the first flow path in the central flow path member 5, and the second side flow path member 7 It passes through the first flow path and is discharged from the outlet 16. On the other hand, the second fluid 11 passes from the inflow port 17 through the second flow passage in the second side flow passage member 7 to the second flow passage in the central flow passage member 5, and the first side flow passage It passes through the second flow passage in the member 6 and is discharged from the outlet 18.

  The inlet 15 of the first fluid 10 and the inlet 17 of the second fluid 11 are disposed on opposite sides of the central flow channel member 5. On the other hand, the outlet 16 of the first fluid 10 and the outlet 18 of the second fluid 11 are disposed on opposite sides of the central flow channel member 5. The inlet 15 of the first fluid 10 and the outlet 18 of the second fluid 11 have a first side symmetrical with respect to a straight line between the first side passage member 6 and the second side passage member 7. The channel member 6 is formed. The outlet 16 of the first fluid 10 and the inlet 17 of the second fluid 11 have a second side symmetrical with respect to a straight line extending between the first side passage member 6 and the second side passage member 7. The channel member 7 is formed.

  For this reason, in the central flow passage member 5, the flow direction of the first fluid 10 and the flow direction of the second fluid 11 are opposite to each other. This situation will be described with reference to the cross-sectional view of FIG. 10. A single heat transfer body 3 has a plurality of first flow paths formed in one layer surrounded by the flow path plate 1 and the space plate 2. Have. The directions of the first fluid 10 flowing in the first flow paths are all the same, and in FIG. 10, flow from the front side to the back side of the paper surface.

  On the other hand, the single heat transfer body 3 continuously overlapping the single heat transfer body 3 also has a plurality of second flow paths formed in one layer surrounded by the flow path plate 1 and the space plate 2. . The directions of the second fluid 11 flowing in the second flow paths are all the same, and in FIG. 10, flow from the back to the front of the paper.

  Thus, the flow of the first fluid 10 or the second fluid 11 in the stacked layers in which the first fluid 10 and the second fluid 11 flow alternately is alternately opposite to each other, and the first fluid 10 and the second fluid 11 are alternately The fluid 11 and the flow channel plate 1 are opposed to each other to perform total heat exchange. Thereby, the heat exchange element 14 can achieve high total heat exchange efficiency.

<Heat exchange element 14 of the conventional example>
FIG. 11 is a perspective view showing the heat exchange element 14 of the conventional example. As shown in FIG. 11, in the heat exchange element 14 of the conventional example, the notch 33 is not formed, and the airtight process 13 is not performed.

<Problems of heat exchange element 14 of the conventional example>
FIG. 12 is an explanatory view showing the failure of the flow passage in the heat exchange element 14 of the conventional example. FIG. 12 shows a state in which the second flow passage is broken at the junction of the first side flow passage member 6 with the central flow passage member 5. In FIG. 12, in the first flow path, the first fluid 10 flows from the front side to the back side of the drawing sheet. On the other hand, in FIG. 12, in the second flow path, the second fluid 11 flows from the right side to the left side of the drawing. That is, in the first side channel member 6, as shown in FIGS. 8 and 9, the first fluid 10 flows from the inlet 15 to the central channel member 5, and the second fluid 11 is reverse to the first fluid 10 It flows from the central channel member 5 to the outlet 18 which is a direction and a cross direction. The first fluid 10 and the second fluid 11 respectively flow through the first and second channels divided through the channel plate 1, and the first fluid 10 and the second fluid 11 are originally It will not be mixed.

  As shown in FIG. 12, when peeling of the adhesion state between the flow passage plate 1 and the space plate 2 in which warping occurs in the heat transfer member 3 due to use over time occurs, between the flow passage plate 1 and the space plate 2 In addition, an inflow gap 19 is generated in which the flow path plate 1 in which the warpage has occurred and the spacing plate 2 are separated. Here, the case where the inflow gap 19 is generated in the second flow path will be described. When the inflow gap 19 is generated, the distance between the second flow paths between the flow path plates 1 adjacent to each other with the same width is originally connected flatly between the central flow path member 5 and the first side flow path member 6. The first side flow path member 6 is enlarged. Thereby, the first flow passage of the central flow passage member 5 and the second flow passage of the first side flow passage member 6 having the inflow gap 19 are connected. Then, the first fluid 10 of the central flow passage member 5 can enter the second flow passage of the first side flow passage member 6. Alternatively, the second fluid 11 of the first side flow passage member 6 can enter the first flow passage of the central flow passage member 5. Thus, the restriction of the distance between the first flow path and the second flow path by the spacer plate 2 is insufficient. Therefore, the mixing of the first fluid 10 and the second fluid 11 occurs from the position shift point of the flow channel plates 1 which should be connected with each other between the central flow channel member 5 and the first side flow channel member 6 in principle. .

<Method for Solving Problem of Conventional Example in Embodiment 1>
In the first embodiment, the notch 33 is formed in the heat exchange element 14. For this reason, the flow paths of the end portions of the joint portion between the central flow path member 5 and the first side flow path member 6 and the second side flow path member 7 are formed by the notches 33 and the airtight process 13. The flow of the first fluid 10 and the second fluid 11 is previously shut off. Therefore, at the end of the joint between the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7 respectively, the flow passage plate 1 and the space plate 2 in which the warpage occurs are Even if the separated inflow gap 19 occurs, the positions of the flow path plates 1 which should be connected with each other in the respective flats of the central flow path member 5 and the first side flow path member 6 or the second side flow path member 7 The mixing of the first fluid 10 and the second fluid 11 from the displacement point can be effectively shut off. Therefore, in the heat exchange element 14 according to the first embodiment, the ventilation function and the heat exchange function of the first fluid 10 and the second fluid 11 can be effectively exhibited even when aged deterioration occurs.

<Modification 1>
FIG. 13 is a perspective view showing a heat exchange element 14 according to Modification 1 of Embodiment 1 of the present invention. Here, the same matters as those of the above-described embodiment are omitted, and only their characteristic portions will be described.

  As shown in FIG. 13, the heat exchange element 14 includes a rail member 34 inserted into the notch 33. The rail member 34 is inserted through the dovetail-shaped notched portion 33 over the entire stacking direction of the flow passage plate 1 of the heat exchange element 14. Since one pair of notch portions 33 is formed, one pair of rail members 34 is also provided. An airtight process 13 is applied to the surface of the notch 33.

  The rail member 34 is made of metal or resin. For this reason, the rail member 34 has a small volume change due to changes in temperature and humidity of the environment. The rail member 34 is a quadrangular prism having a trapezoidal cross section similar to the dovetail groove of the notch 33. The rail member 34 is longer than the length of the heat exchange element 14 in the stacking direction of the flow path plate 1, and both ends of the rail member 34 project from the flow path plate 1 at both ends of the heat exchange element 14. That is, the rail members 34 project both ends from the heat exchange element 14.

  The rail member 34 is inserted into the notch 33 from one end of the flow passage plate 1 of the heat exchange element 14 in the stacking direction. At this time, the rail member 34 is restricted from being separated from the notch 33 by the surface of the oblique side of the dovetail groove-shaped trapezoidal cross section of the notch 33. Therefore, it does not come off in the direction of the upper U or the lower D of the end of the flow channel plate 1 of the central flow channel member 5.

  The heat exchange element 14 includes a support 35 that supports the rail member 34. The support member 35 connects the both end portions of each of the pair of rail members 34 across the plane portion of the flow passage plate 1 of the heat exchange element 14. The support 35 is made of metal or resin. The support 35 has a small volume change due to changes in temperature and humidity of the environment. The contact portion between the supporting member 35 and the rail member 34 is in contact with the surface, and when the force is applied to the rail member 34 toward the center of the central flow passage member 5, the supporting member 35 is supported by the touching surface. It is.

  Thus, by providing the rail member 34 and the support member 35, it is possible to prevent the deformation of the central flow passage member 5 in the central direction due to the aged deterioration of the heat exchange element 14, and to extend the product life. Specifically, when the central flow passage member 5 is deformed in the central direction, a force in the central direction of the central flow passage member 5 is applied to the rail member 34 from the notches 33 of the central flow passage member 5. The force causes the rail member 34 to move in the central direction of the central flow passage member 5, but the support member 35 supports and regulates the movement of the rail member 34. Thereby, the movement of the rail member 34 does not occur, and the deformation of the heat exchange element 14 does not occur.

  If the shape of the rail member 34 is a shape that is long in the direction parallel to the flow path flowing in the central flow path member 5 at a position closer to the central direction than the direction of the end of the central flow path member 5 In addition to the trapezoidal cross section, it may be a polygonal cross section or a substantially circular cross section.

<Modification 2>
FIG. 14 is a perspective view showing a heat exchange element 14 according to the second modification of the first embodiment of the present invention. Here, the same matters as those in the above-described embodiment and the like are omitted, and only the characteristic parts will be described. As shown in FIG. 14, the heat exchange element 14 includes a frame 36 in which the heat exchange element 14 is fitted. The frame 36 is formed with a recess 37 through which the rail member 34 is inserted together with the notch 33. An airtight process 13 is applied to the surface of the notch 33.

  The rail member 34 has a shape in which another cross-sectional polygonal shape is combined in addition to the cross-sectional polygonal shape inserted into the notch portion 33. A narrow portion is provided between the cross sectional polygonal shapes of both of the rail members 34. In the case where the cross-sectional trapezoidal shape is combined as an example of the rail member 34, the short side portion of the cross-sectional trapezoidal shape is combined, and there is a portion shorter than the end portion which is the long side portion. This short part becomes a constriction.

  The side of the rail member 34, which is inserted through the notch 33 of the heat exchange element 14, is referred to as a first polygonal portion, and the portion protruding to the opposite side is referred to as a second polygonal portion.

  The heat exchange element 14 is provided with a frame 36. The frame 36 guides the heat exchange element 14 when the heat exchange element 14 is disposed in the frame 36. The frame 36 is a box member provided along the direction in which the heat exchange element 14 is inserted.

  The frame body 36 is formed with a recess 37 having the same shape as the second polygonal portion of the rail member 34. The heat exchange element 14 is inserted into the frame 36, and the rail member 34 is inserted into both the notch 33 and the recess 37 of the heat exchange element 14. Thus, the heat exchange element 14 is fixed to the frame 36. In the heat exchange element 14 thus fixed, the heat exchange element 14 is held by the frame 36 even if a force for deforming the heat exchange element 14 is generated. Therefore, deformation of the heat exchange element 14 can be suppressed.

<Modification 3>
FIG. 15 is a perspective view showing a heat exchange element 14 according to Modification 3 of Embodiment 1 of the present invention. Here, the same matters as those in the above-described embodiment and the like are omitted, and only the characteristic parts will be described. As shown in FIG. 15, the heat exchange element 14 includes a frame 36 in which the heat exchange element 14 is fitted. The frame 36 is formed with a recess 37 through which the rail member 34 is inserted together with the notch 33. An airtight process 13 is applied to the surface of the notch 33.

  The heat exchange element 14 has a shape in which the shapes of the pair of notches 33 and the shape of the pair of recesses 37 of the frame 36 are different from each other. The pair of rail members 34 has the same shape as the combination of the shapes of the notches 33 and the recesses 37 respectively. However, the pair of rail members 34 have different shapes.

  The notches 33 respectively formed on the pair of edges of the heat exchange element 14 have different shapes at each edge. A rail member 34 having a corresponding shape is inserted through the differently shaped notch 33. The rail member 34 inserted into the heat exchange element 14 is also inserted into the recess 37 formed in the frame 36 at the time of insertion.

  At this time, if the installation direction of the heat exchange element 14 on the frame 36 is not correct, the rail member 34 can not be inserted into the heat exchange element 14. Thereby, the installation direction of the heat exchange element 14 to the frame 36 is defined, and the installation in the wrong direction can be prevented.

<Modification 4>
FIG. 16 is a perspective view showing a heat exchange element 14 according to Modification 4 of Embodiment 1 of the present invention. FIG. 17 is a bottom view of the heat exchange element 14 according to the fourth modification of the first embodiment of the present invention as viewed in the direction of arrow C in FIG. Here, the same matters as those in the above-described embodiment and the like are omitted, and only the characteristic parts will be described.

  As shown in FIG. 16 and FIG. 17, the cutaway portion 33 is formed to be inclined with respect to the stacking direction of the flow passage plate 1 of the heat exchange element 14. Thereby, even when the notch 33 can not be formed along the stacking direction of the flow path plate 1, the notch 33 can be formed. An airtight process 13 is applied to the surface of the notch 33.

<Modification 5>
FIG. 18 is a perspective view showing a heat exchange element 14 according to Modification 5 of Embodiment 1 of the present invention. Here, the same matters as those in the above-described embodiment and the like are omitted, and only the characteristic parts will be described. As shown in FIG. 18, the notches 33 may be provided in the first side passage member 6 and the second side passage member 7. An airtight process 13 is applied to the surface of the notch 33.

  The cutaway portion 33 is formed adjacent to a junction of the first side flow passage member 6 and the second side flow passage member 7 with the central flow passage member 5. Since the cutaway portion 33 is adjacent to the junction of the first side flow passage member 6 and the second side flow passage member 7 with the central flow passage member 5, the central flow passage member 5 and the first side flow passage member When peeling occurs at the end of the junction with each of the 6 or the second side flow passage members 7, the flow passage of the peeling off end is cut off in advance by the notch 33, and the first fluid 10 and the second fluid 11 mixing is prevented.

<Effect of Embodiment 1>
According to the first embodiment, the heat exchange element 14 includes the central flow passage member 5 in which the plurality of flow passage plates 1 are stacked. The heat exchange element 14 includes a first side flow passage member 6 and a second side flow passage member 7 respectively joined to both sides of the central flow passage member 5. The heat exchange element 14 is formed in a flow path through which the first fluid 10 and the second fluid 11 flow alternately between the flow path plates 1 adjacent in the stacking direction, and the first fluid via the flow path plate 1 10 and the second fluid 11 exchange heat. At the edge of the stacked flow channel plate 1 in the planar direction of the flow channel plate 1, a notch 33 is formed which blocks part of the flow channel. An airtight process 13 is applied to the surface of the notch 33.

  According to this configuration, the flow path at the end of the joining portion between the central flow path member 5 and the first side flow path member 6 and the second side flow path member 7 has the notch 33 and the airtight process 13. The flow of the first fluid 10 and the second fluid 11 is previously shut off. Therefore, when peeling occurs at the end of the joint between the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7, respectively, the first fluid 10 and the second fluid 11 Mixing can be reliably prevented. Therefore, in the heat exchange element 14, the ventilation function and the heat exchange function of the first fluid 10 and the second fluid 11 can be reliably exhibited even when aged deterioration occurs.

  According to the first embodiment, the airtight process 13 is performed using an airtight process agent having viscosity.

  According to this configuration, the airtightness processing agent has a viscosity, so that the airtightness treatment agent is pressed into the inside of the notch 33 and embedded after the application of the airtightness agent, and the airtightness treatment 13 of the notch 33 is more reliably performed. It can be applied.

  According to the first embodiment, the sealing process 13 is performed using a thermally foamable sealing agent.

  According to this configuration, the airtightness treating agent is thermally foamable, so that the airtightness treating agent is heated and foamed after application of the airtightness treating agent, and is embedded in the notch 33 and the airtightness of the notch 33 Process 13 can be applied more reliably.

  According to the first embodiment, the notches 33 are formed at the edge of the central flow passage member 5.

  For example, when the cutaway portion 33 is formed in the first side flow passage member 6, peeling occurs at the end of the junction between the central flow passage member 5 and the second side flow passage member 7. , Mixing of the first fluid 10 and the second fluid 11 occurs. According to this configuration, since the notch 33 is formed at the edge of the central flow passage member 5, the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7 respectively Even if peeling occurs at the end of either of the bonding points, mixing of the first fluid 10 and the second fluid 11 can be prevented. Thus, the manufacturing number of the notches 33 can be reduced, and the manufacture of the heat exchange element 14 becomes easy.

  According to the first embodiment, the cutaway portion 33 is formed at the edge of the joint portion of the first side flow passage member 6 and the second side flow passage member 7 with the central flow passage member 5.

  According to this configuration, the notch 33 and the airtight process 13 formed at the edge of the joint portion of the first side flow passage member 6 with the central flow passage member 5 are the central flow passage member 5 and the first side. When peeling occurs at the end of the joint portion with the partial flow passage member 6, the mixing of the first fluid 10 and the second fluid 11 can be prevented. The notch 33 and the airtight process 13 formed at the edge of the joint portion of the second side flow passage member 7 with the central flow passage member 5 are the central flow passage member 5 and the second side flow passage member 7. When peeling occurs at the end of the joint portion, mixing of the first fluid 10 and the second fluid 11 can be prevented. Thus, when peeling occurs at the end of the junction between the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7, respectively, the first fluid 10 and the second fluid 10 and the second The mixing of the fluid 11 can be reliably prevented.

  According to the first embodiment, the cutaway portion 33 is formed to penetrate all of the stacked flow path plates 1.

  According to this configuration, one notch portion 33 can reliably prevent the mixing of the first fluid 10 and the second fluid 11 over the entire stacked flow path plate 1. Moreover, the shape of the notch 33 can be simplified, and the manufacture of the heat exchange element 14 is easy.

  According to the first embodiment, the notches 33 are formed along the stacking direction of the flow path plate 1 orthogonal to the planar direction of the flow path plate 1.

  According to this configuration, the shape of the notches 33 can be simplified, and the heat exchange element 14 can be easily manufactured.

  According to the first embodiment, the notch 33 is formed to be inclined with respect to the stacking direction of the flow path plate 1.

  According to this configuration, even when the cutaway portion 33 can not be formed along the stacking direction of the flow path plate 1, the cutaway portion 33 can be formed.

  According to the first embodiment, the width in the planar direction of the flow channel plate 1 in the notch 33 becomes wider toward the central portion of the flow channel plate 1.

  According to this configuration, when the rail member 34 is inserted into the notch 33, the rail member 34 is unlikely to come off the outer side.

  According to the first embodiment, the heat exchange element 14 includes the rail member 34 which is inserted into the notch 33.

  According to this configuration, when the heat exchange element 14 has the notches 33, the heat exchange element 14 becomes weak in deformation, but by being supported by the rail member 34, the deformation of the heat exchange element 14 can be suppressed.

  According to the first embodiment, the heat exchange element 14 includes the frame 36 in which the heat exchange element 14 is fitted. The frame 36 is formed with a recess 37 through which the rail member 34 is inserted together with the notch 33.

  According to this configuration, when the rail member 34 is inserted into the recess 33 of the frame 36 together with the notch 33, the heat exchange element 14 can be reliably fixed to the frame 36 by the rail member 34.

  According to the first embodiment, the notches 33 are respectively formed at a pair of opposing edge portions of the stacked flow channel plates 1 in the planar direction of the flow channel plate 1.

  According to this configuration, when peeling occurs at the end of the pair of edges of the joint between the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7 respectively. The mixing of the first fluid 10 and the second fluid 11 can be reliably prevented.

  According to the first embodiment, the notches 33 respectively formed in the pair of edges have the same shape.

  According to this configuration, the shape of the notches 33 can be simplified, and the heat exchange element 14 can be easily manufactured. Further, the left, right, upper and lower shapes of the heat exchange element 14 can be made the same, and the direction in which the heat exchange element 14 is mounted on the heat exchange ventilator 20 is not defined, and the mounting becomes easy.

  According to the first embodiment, the notches 33 respectively formed in the pair of edges have different shapes at each edge.

  According to this configuration, the left and right upper and lower parts of the heat exchange element 14 can be distinguished by the difference in the shape of the cutaway part 33, and the direction at the time of mounting on the heat exchange ventilator 20 can be specified with certainty.

  According to the first embodiment, the first joint as the sealing member is provided at the joint where the central flow passage member 5 is joined to each of the first side flow passage member 6 and the second side flow passage member 7. A tape 8 and a second bonding tape 9 are provided.

  According to this configuration, the joint portion where the central flow passage member 5 is joined to each of the first side flow passage member 6 and the second side flow passage member 7 is the first bonding tape 8 and the second bonding tape 9. Can be sealed.

  According to the first embodiment, the heat exchange ventilator 20 includes the heat exchange element 14 described above, and performs heat exchange while ventilating the air between the room I and the room O.

  According to this configuration, in the heat exchange ventilator 20 provided with the heat exchange element 14, the end of the joint between the central flow passage member 5 and the first side flow passage member 6 or the second side flow passage member 7. In the case where peeling occurs, mixing of the first fluid 10 and the second fluid 11 can be reliably prevented.

  DESCRIPTION OF SYMBOLS 1 flow path plate, 2 space | interval plate, 3 heat-transfer body, 5 center flow path member, 6 1st side flow path member, 7 2nd side flow path member, 8 1st bonding tape, 9 2nd bonding tape, 10 1st fluid, 11 2nd fluid, 13 airtight process, 14 heat exchange element, 15 inlet, 16 outlet, 17 inlet, 18 outlet, 19 inlet gap, 20 heat exchange ventilator, 21 exhaust fan, 22 Air supply fan, 25 Outside air duct, 26 Air supply duct, 27 return air duct, 28 exhaust duct, 29 outdoor air intake, 30 outdoor air exhaust, 31 indoor air supply, 32 indoor air exhaust, 33 notches, 34 rails Members, 35 supports, 36 frames, 37 recesses.

Claims (16)

A central flow passage member in which a plurality of flow passage plates are stacked;
A first side passage member and a second side passage member joined respectively to both sides of the central passage member;
Equipped with
The first fluid and the second fluid are alternately formed between the flow passage plates adjacent to each other in the stacking direction, and the first fluid and the second fluid are alternately formed through the flow passage plate. A heat exchange element that exchanges heat,
In the edge portion of the flow path plate stacked in the planar direction of the flow path plate, a cut-out portion for blocking a part of the flow path is formed;
The heat exchange element to which airtight processing is given to the surface of the said notch part.   The heat exchange element according to claim 1, wherein the sealing process is performed using a sealing process agent having viscosity.   The heat exchange element according to claim 1, wherein the airtight process is performed using a thermally foamable airtight process agent.   The heat exchange element according to any one of claims 1 to 3, wherein the notch portion is formed at an edge portion of the central flow passage member.   The said notch part is formed in the edge of the junctional place with the said center flow path member in the said 1st side flow path member and the said 2nd side flow path member, The any one of Claims 1-3 The heat exchange element according to item 1.   The heat exchange element according to any one of claims 1 to 5, wherein the notch portion is formed to penetrate all the stacked flow path plates.   The heat exchange element according to any one of claims 1 to 6, wherein the notch portion is formed along a stacking direction of the flow passage plate orthogonal to a plane direction of the flow passage plate.   The heat exchange element according to any one of claims 1 to 6, wherein the notch portion is formed to be inclined with respect to the stacking direction of the flow path plate.   The heat exchange element according to any one of claims 1 to 8, wherein a width in a plane direction of the flow passage plate in the notch portion becomes wider toward a central portion of the flow passage plate.   The heat exchange element according to any one of claims 1 to 9, further comprising: a rail member inserted into the notch. A frame into which the heat exchange element is fitted;
The heat exchange element according to claim 10, wherein the frame body is formed with a recess through which the rail member is inserted together with the notch.   The heat according to any one of claims 1 to 11, wherein the notches are respectively formed at opposing edge portions of the pair of flow path plates stacked in the planar direction of the flow path plate. Exchange element.   The heat exchange element according to claim 12, wherein the notches respectively formed in the pair of edges have the same shape.   The heat exchange element according to claim 12, wherein the notches respectively formed in the pair of edges have different shapes at each edge.   The sealing member is provided in the joining location to which the said center flow path member, each of the said 1st side flow path member, and each of the said 2nd side flow path member were joined, the sealing member is provided. The heat exchange element according to item 1.   A heat exchange ventilator comprising the heat exchange element according to any one of claims 1 to 15, and performing heat exchange while ventilating indoor and outdoor air.

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