Heat exchange ventilation system

Abstract

This technology improves the ease of assembly of heat exchange ventilation systems. [Solution] The top rail portion 152 slidably holds the upper end of the heat exchange element 200 between the first side and the second side, and the bottom rail portion 154 slidably holds the lower end of the heat exchange element 200 between the first side and the second side. The first end portion 300 on the first side of the top rail portion 152 is further from the first side than the second end portion 302 on the first side of the bottom rail portion 154. The housing 100 includes a maintenance opening 124 for housing the heat exchange element 200 from the first side, a panel portion 120 for opening and closing the maintenance opening 124, and an engagement recess 310 which is a space surrounded by the top surface 110, the upper end of the heat exchange element 200, and the first end portion 300 of the top rail portion 152. The first lead wire 140a passes through the engagement recess 310 and straddles the upper end of the heat exchange element 200.

Description

Technical Field

[0001] The present disclosure relates to a heat exchange type ventilation device.

Background Art

[0002] Conventionally, in a heat exchange type ventilation device, a heat exchange element is removably accommodated inside a box-shaped exterior casing. Specifically, a plurality of guide rails are provided inside the exterior casing, and the ridge line portions of the heat exchange element are held by each guide rail. These guide rails are installed after wiring lead wires inside the exterior casing (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of a configuration where the guide rails are installed after wiring the lead wires inside the exterior casing, when inserting the heat exchange element into the exterior casing, the heat exchange element must be inserted straight along the exterior casing, and the heat exchange element cannot be inserted obliquely into the exterior casing. Therefore, there is room for improvement in the assemblability of the heat exchange type ventilation device.

[0005] Therefore, the present disclosure solves the above problems and aims to provide a technique for improving the assemblability of a heat exchange type ventilation device.

Means for Solving the Problems

[0006] To solve the above problems, a heat exchange ventilation system according to one embodiment of the present disclosure comprises a housing including a bottom surface and a top surface facing each other, and a plurality of sides connected to the bottom surface and the top surface; an air supply fan disposed inside the housing for transporting an air supply flow; an exhaust fan disposed inside the housing for transporting an exhaust flow; a heat exchange element housed inside the housing for exchanging heat between the air supply flow and the exhaust flow; a top-side rail portion provided on the top surface for holding the upper end of the heat exchange element; a bottom-side rail portion provided on the bottom surface for holding the lower end of the heat exchange element; a control unit for controlling the operation of the air supply fan and the exhaust fan; and lead wires wired across the heat exchange element and connected to the control unit. When one of several sides is defined as the first side, the side opposite the first side is defined as the second side. The top rail portion slidably holds the upper end of the heat exchange element between the first and second sides, and the bottom rail portion slidably holds the lower end of the heat exchange element between the first and second sides. The first end of the top rail portion on the first side is further from the first side than the second end of the bottom rail portion on the first side. The housing includes a maintenance opening for housing the heat exchange element from the first side, a panel portion for opening and closing the maintenance opening, and an engagement recess which is a space enclosed by the top surface, the upper end of the heat exchange element, and the first end of the top rail portion. The lead wire passes through the engagement recess and straddles the upper end of the heat exchange element, and is provided with an elastic body that covers the outer circumference of the lead wire at a position corresponding to the engagement recess.

[0007] Another aspect of the present disclosure is also a heat exchange ventilation system. This system comprises a housing including a bottom surface and a top surface facing each other, and a plurality of sides connected to the bottom surface and the top surface; an air supply fan disposed inside the housing for transporting an air supply flow; an exhaust fan disposed inside the housing for transporting an exhaust flow; a heat exchange element housed inside the housing for exchanging heat between the air supply flow and the exhaust flow; a top-side rail portion provided on the top surface for holding the upper end of the heat exchange element; a bottom-side rail portion provided on the bottom surface for holding the lower end of the heat exchange element; a control unit for controlling the operation of the air supply fan and the exhaust fan; and lead wires wired across the heat exchange element and connected to the control unit. When one of several sides is defined as the first side, the side opposite the first side is defined as the second side. The top rail portion slidably holds the upper end of the heat exchange element between the first and second sides, and the bottom rail portion slidably holds the lower end of the heat exchange element between the first and second sides. The second end of the bottom rail portion on the first side is further away from the first side than the first end of the top rail portion on the first side. The housing includes a maintenance opening for housing the heat exchange element from the first side, a panel portion for opening and closing the maintenance opening, and an engagement recess which is a space enclosed by the bottom surface, the lower end of the heat exchange element, and the second end of the bottom rail portion. The lead wire passes through the engagement recess and crosses the lower end of the heat exchange element, and is provided with an elastic body that covers the outer circumference of the lead wire at a position corresponding to the engagement recess. [Effects of the Invention]

[0008] According to this disclosure, the ease of assembly of heat exchange ventilation systems can be improved. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view showing the configuration of the heat exchange ventilation system according to this embodiment. [Figure 2] Figures 2(a) and 2(b) are side views showing the configuration of the heat exchange ventilation system shown in Figure 1. [Figure 3] Figure 1 is a cross-sectional view showing the configuration of a heat exchange ventilation system. [Figure 4] Figure 1 is a perspective view of the heat exchange element housed in the enclosure. [Figure 5] Figures 5(a) and 5(b) are cross-sectional views showing the configuration of the heat exchange ventilation system shown in Figure 1. [Figure 6] Figures 6(a)-(d) show the configuration of the top rail section, bottom rail section, and side rail section shown in Figures 5(a)-(b). [Figure 7] This is a cross-sectional view showing the configuration of the enclosure in Figure 1. [Figure 8] Figures 8(a)-(c) are cross-sectional views showing the procedure for housing the heat exchange element in the enclosure shown in Figure 7. [Modes for carrying out the invention]

[0010] The embodiments of this disclosure will be described below with reference to the drawings. Each embodiment described below represents a preferred specific example of this disclosure. Therefore, the numerical values, shapes, materials, components, arrangement and connection configurations of components, as well as the steps (processes) and the order of steps shown in the following embodiments are examples and are not intended to limit this disclosure. Accordingly, components in the following embodiments that are not described in the independent claims representing the highest-level concepts of this disclosure will be described as arbitrary components. In addition, substantially identical components are denoted by the same reference numerals in each figure, and redundant explanations are omitted or simplified.

[0011] In the following, this embodiment will be described in the following order: (1) overall configuration, (2) configuration for housing the heat exchange element in the housing, and (3) procedure for housing the heat exchange element in the housing. (1) Overall structure Figure 1 is a perspective view showing the configuration of a heat exchange ventilation system 1000. The housing 100 has a box shape and includes a top surface 110, a bottom surface 112, and four sides 114a to 114d, collectively referred to as side surfaces 114. The top surface 110, bottom surface 112, and side surfaces 114 are all rectangular in shape. The top surface 110 and bottom surface 112 extend horizontally and face each other. The top surface 110 is positioned on the upper side, and the bottom surface 112 is positioned on the lower side. The side surfaces 114 are connected to the top surface 110 and bottom surface 112 and extend vertically. The first side surface 114a and the second side surface 114b face each other, and the third side surface 114c and the fourth side surface 114d face each other. Here, the top surface 110 includes the surface facing the inside of the housing 100 and the surface facing the outside of the housing 100, but both are referred to as the top surface 110. The same applies to the bottom surface 112 and the side surface 114.

[0012] An outside air inlet 130 and an exhaust vent 136 are located on the third side 114c, and an air intake vent 132 and an air intake vent 134 are located on the fourth side 114d. Ducts (not shown) can be connected to each of the outside air inlet 130, air intake vent 132, air intake vent 134, and exhaust vent 136. Ducts connected to the outside air inlet 130 and exhaust vent 136 are routed to the exterior wall surface of the building to communicate with the outside air. Ducts connected to the air intake vent 132 and air intake vent 134 are connected to the ceiling or wall surface of the room to communicate with the indoor air. Here, the airflow that enters from the outside air inlet 130, passes through the casing 100, and exits from the air intake vent 132 is called the "air intake flow". Also, the airflow that enters from the air intake vent 134, passes through the casing 100, and exits from the exhaust vent 136 is called the "air exhaust flow".

[0013] The first side surface 114a houses the panel section 120 and the control unit 122. To illustrate the configuration of the first side surface 114a, Figures 2(a) and 2(b) are used. Figures 2(a) and 2(b) are side views showing the configuration of the heat exchange ventilation system 1000. As shown in Figure 2(a), the panel section 120 is located in the central part of the first side surface 114a, and the control unit 122 is located on the fourth side surface 114d side of the panel section 120. The control unit 122 may also be located on the third side surface 114c side of the panel section 120.

[0014] Figure 2(b) shows a configuration in which the panel portion 120 and the control portion 122 are removed from the configuration of Figure 2(a). A maintenance opening 124, which is a rectangular opening, is arranged at the central portion of the first side surface 114a. The maintenance opening 124 is used to accommodate the heat exchange element 200 from the side of the first side surface 114a. The inside of the housing 100 can be seen from the maintenance opening 124, and the configuration inside the housing 100 will be described later. The aforementioned panel portion 120 opens and closes the maintenance opening 124.

[0015] On the first side surface 114a, a first lead wire extraction opening 126a and a second lead wire extraction opening 126b, collectively referred to as a lead wire extraction opening 126, are provided. The lead wire extraction opening 126 is a circular opening. Inside the housing 100, a first lead wire 140a and a second lead wire 140b (not shown) are wired. The first lead wire 140a is connected to the control portion 122 through the first lead wire extraction opening 126a, and the second lead wire 140b is connected to the control portion 122 through the second lead wire extraction opening 126b. The first lead wire 140a and the second lead wire 140b are collectively referred to as the lead wire 140.

[0016] Figure 3 is a cross-sectional view showing the configuration of the heat exchange type ventilation device 1000. This is a cross-sectional view taken along the line A-A in Figure 1. A boundary wall 180 is provided from the third side surface 114c toward the fourth side surface 114d, and the inside of the housing 100 is separated into an air supply flow region 182 and an exhaust flow region 184 by the boundary wall 180. The air supply flow region 182 includes an outdoor air inlet 130, an air supply port 132, and an air supply fan 170, and the exhaust flow region 184 includes an indoor air inlet 134, an exhaust port 136, and an exhaust fan 172. Also, the air supply flow region 182 and the exhaust flow region 184 include a heat exchange element 200.

[0017] The air supply fan 170 in the air supply flow region 182 conveys an air supply flow from the outdoors to the indoors. The air supply fan 170 includes, for example, a sirocco fan which is a centrifugal impeller for boosting air pressure, and an air supply flow is generated by the rotation of the sirocco fan. The air supply flow is sucked in from the outdoor air inlet 130 and blown out from the air supply port 132 through the heat exchange element 200.

[0018] The exhaust fan 172 in the exhaust gas flow region 184 conveys the exhaust gas flow from indoors to outdoors. The exhaust fan 172 also includes, for example, a sirocco fan which is a centrifugal impeller for boosting the pressure of air, and the exhaust gas flow is generated by the rotation of the sirocco fan. The exhaust gas flow is sucked in from the inner air inlet 134 and blown out from the exhaust port 136 through the heat exchange element 200.

[0019] The heat exchange element 200 is arranged at a position where the path of the supply air flow and the path of the exhaust air flow intersect. The heat exchange element 200 exchanges heat between the supply air flow and the exhaust air flow. That is, the heat exchange element 200 has a heat recovery function of supplying the heat quantity of the exhausted air to the supplied air, or supplying the heat quantity of the supplied air to the heat quantity of the exhausted air.

[0020] The control unit 122 is connected to the exhaust fan 172 by a first lead wire 140a (not shown) and is connected to the supply fan 170 by a second lead wire 140b (not shown). The control unit 122 controls the operations of the supply fan 170 and the exhaust fan 172. For example, the control unit 122 controls the rotation speed of the supply motor of the supply fan 170 and controls the rotation speed of the exhaust motor of the exhaust fan 172. The control unit 122 can also control while keeping the supply air volume and the exhaust air volume constant.

[0021] FIG. 4 is a perspective view of the heat exchange element 200 housed in the housing 100. The heat exchange element 200 has a prismatic shape and includes a first side surface 214a to a fourth side surface 214d collectively referred to as an upper surface 210, a lower surface 212, and a side surface 214. The upper surface 210, the lower surface 212, and the side surface 214 all have a rectangular shape. The upper surface 210 and the lower surface 212 face each other. The upper surface 210 is arranged on the upper side and the lower surface 212 is arranged on the lower side. The side surface 214 connects the upper surface 210 and the lower surface 212. Also, the first side surface 214a and the third side surface 214c face each other, and the second side surface 114b and the fourth side surface 214d face each other.

[0022] A first ridge section 216a extending in the height direction is positioned between the fourth side surface 214d and the first side surface 214a, and a second ridge section 216b extending in the height direction is positioned between the first side surface 214a and the second side surface 214b. Furthermore, a third ridge section 216c extending in the height direction is positioned between the second side surface 214b and the third side surface 214c, and a fourth ridge section 216d extending in the height direction is positioned between the third side surface 214c and the fourth side surface 214d. The first ridge sections 216a to the fourth ridge sections 216d are collectively referred to as ridge section 216.

[0023] As shown in Figure 2(b), the ridge portion 216 in the height direction is oriented horizontally and housed in the housing 100. Therefore, the upper surface 210 faces the first side surface 114a, and the lower surface 212 faces the second side surface 114b. As described above, the heat exchange element 200 exchanges heat with the supply airflow and the exhaust airflow. For this purpose, the heat exchange element 200 is formed by stacking a plurality of heat transfer plates with predetermined intervals between them, and the supply airflow and exhaust airflow alternately flow through each layer.

[0024] In the configuration shown in Figure 2(b), the third side surface 214c is provided with an air intake opening (not shown) for drawing in the air intake, and the first side surface 214a is provided with an air outlet opening (not shown) for blowing out the air intake. Furthermore, the second side surface 214b is provided with an exhaust intake opening (not shown) for drawing in the exhaust air intake, and the fourth side surface 214d is provided with an exhaust outlet opening (not shown) for blowing out the exhaust air intake. Here, the air intake opening and the air outlet opening open to the air intake region 182, and the exhaust intake opening and the exhaust outlet opening open to the exhaust air intake region 184.

[0025] (2) Configuration in which a heat exchange element is housed in the enclosure Figures 5(a) and 5(b) are cross-sectional views showing the configuration of the heat exchange ventilation system 1000. These are cross-sectional views of BB in Figure 1. Figure 5(b) shows the configuration in which the lead wires 140 and elastic body 142 are omitted from Figure 5(a). Inside the housing 100, a heat exchange element 200 is arranged in the central part, a supply fan 170 is arranged on the fourth side 114d side of the heat exchange element 200, and an exhaust fan 172 is arranged on the third side 114c side of the heat exchange element 200. As described above, the heat exchange element 200 is housed in the housing 100 with its prismatic height-direction ridge 216 facing horizontally. In addition, boundary walls 180 extending horizontally are arranged between the supply fan 170 and the heat exchange element 200, and between the exhaust fan 172 and the heat exchange element 200.

[0026] A first base 150a is positioned in the central part of the top surface 110. The first base 150a is formed of, for example, expanded polystyrene. A top surface side rail portion 152 is provided on the first base 150a. The top surface side rail portion 152 has a concave shape and holds the first ridge portion 216a, i.e., the upper end, of the heat exchange element 200. In particular, the top surface side rail portion 152 holds the upper end of the heat exchange element 200 so that it can slide between the first side surface 114a and the second side surface 114b.

[0027] A second base 150b is positioned in the central part of the bottom surface 112. The second base 150b is formed from, for example, expanded polystyrene, similar to the first base 150a. The second base 150b is provided with a bottom-side rail portion 154. The bottom-side rail portion 154 has a concave shape and holds the third ridge portion 216c, i.e., the lower end, of the heat exchange element 200. In particular, the bottom-side rail portion 154 holds the lower end of the heat exchange element 200 so that it can slide between the first side surface 114a and the second side surface 114b.

[0028] A first side rail portion 156a is provided on the boundary wall 180 extending between the air supply fan 170 and the heat exchange element 200. The first side rail portion 156a has a concave shape and holds the second ridge portion 216b of the heat exchange element 200. In particular, the first side rail portion 156a holds the second ridge portion 216b of the heat exchange element 200 so that it can slide between the first side surface 114a and the second side surface 114b.

[0029] A second side rail portion 156b is provided on the boundary wall 180 extending between the exhaust fan 172 and the heat exchange element 200. The second side rail portion 156b has a concave shape and holds the fourth ridge portion 216d of the heat exchange element 200. In particular, the second side rail portion 156b holds the fourth ridge portion 216d of the heat exchange element 200 so that it can slide between the first side surface 114a and the second side surface 114b. The first side rail portion 156a and the second side rail portion 156b are collectively referred to as the side rail portion 156.

[0030] In other words, each edge portion 216 of the heat exchange element 200 is held by the top rail portion 152, the bottom rail portion 154, and the side rail portion 156 (hereinafter collectively referred to as "rail portion"). Figures 6(a)-(d) are also used here to explain the configuration of the rail portion. Figures 6(a)-(d) show the configuration of the top rail portion 152, the bottom rail portion 154, and the side rail portion 156.

[0031] Figure 6(a) is a perspective view showing the configuration of the rail section. The rail section includes a base 160 which forms the bottom, and a pair of holding sections 162 which protrude from both ends of the base 160 as walls. The tips of the holding sections 162 are indicated as the first tip 164a and the second tip 164b. The first tip 164a and the second tip 164b are collectively referred to as tip 164. The rail section slidably holds the ridge portion 216 of the heat exchange element 200 at the first tip 164a and the second tip 164b of the holding section 162. In this state, when the heat exchange element 200 is held by the rail section, the ridge portion 216 does not come into contact with the base 160 of the rail section.

[0032] An elastic body 166 may be placed on top of the base 160. The elastic body 166 is positioned between the base 160 and the elastic body 166. In other words, the elastic body 166 is located inside the concave part of the rail. When the holding part 162 holds the heat exchange element 200, the elastic body 166 comes into contact with the ridge portion 216 of the heat exchange element 200. This corresponds to the ridge portion 216 being covered by the elastic body 166 as it bites into the elastic body 166.

[0033] Figure 6(b) is a cross-sectional view of the rail section, illustrating a configuration in which the ridge portion 216 does not come into contact with the base portion 160 of the rail section. In order to prevent the ridge portion 216 of the heat exchange element 200 from rubbing against the base portion 160 of the rail section, the distance between the two ends 164 of the rail section is made shorter than the vertical length from the base portion 160 to the ends 164. More specifically, with the heat exchange element 200 held in the rail section as a reference, the vertical length from the end 164 to the ridge portion 216 (hereinafter referred to as "y") should be shorter than the vertical length from the end 164 to the base portion 160 (hereinafter referred to as "h"). This corresponds to the vertical length (hereinafter referred to as "y") to the ridge portion 216, relative to the position where the width of the two sides 214 flanking the ridge portion 216 (hereinafter referred to as "x") is equal to the width of the two ends 164 (hereinafter referred to as "w"), being shorter than the vertical length (hereinafter referred to as "h") to the end 164 relative to the base 160 of the rail portion. As long as this relationship is maintained, the ridge portion 216 may come into contact with the elastic body 166.

[0034] Figure 6(c) is a cross-sectional view of the rail section. The retaining section 162 protrudes vertically from the base 160 so that a pair of walls face each other. The distance "w" between the first tip 164a and the second tip 164b is shorter than the vertical length "h" from the base 160 to the tip 164.

[0035] Figure 6(d) is a cross-sectional view of the rail section. The retaining portion 162 protrudes such that the two retaining portions 162 move closer to each other as it moves away from the base 160. The distance "w" between the first tip 164a and the second tip 164b is shorter than the vertical length "h" from the base 160 to the tip 164.

[0036] The effect of gravity on holding the heat exchange element 200 differs between the top rail section 152 and the bottom rail section 154. The sizes of the top rail section 152 and the bottom rail section 154 may differ to account for this effect. The spacing between the tips 164 on the bottom rail section 154 may be shorter than the spacing between the tips 164 on the top rail section 152. Since the load on the bottom rail section 154 is greater than the load on the top rail section 152 due to gravity, the width of the rail on the bottom rail section 154 is narrower than that on the top rail section 152.

[0037] Furthermore, the vertical length of the top rail section 152 from its base 160 to its tip 164 may be longer than the vertical length of the bottom rail section 154 from its base 160 to its tip 164. Since the load applied to the bottom rail section 154 is greater than the load applied to the top rail section 152 by the amount of gravity, the rail height "h" of the top rail section 152 is made higher than that of the bottom rail section 154.

[0038] The contact area between the elastic body 166 of the bottom rail section 154 and the heat exchange element 200 is larger than the contact area between the elastic body 166 of the top rail section 152 and the heat exchange element 200. The load applied to the bottom rail section 154 is greater than the load applied to the top rail section 152 by the amount of gravity, so the heat exchange element 200 sinks into the elastic body 166 more in the bottom rail section 154 than in the top rail section 152.

[0039] Returning to Figure 5(a)-(b), as described above, the first lead wire 140a connects the exhaust fan 172 to the control unit 122 (not shown), and the second lead wire 140b connects the supply fan 170 to the control unit 122. Here, the first lead wire 140a is wired across the heat exchange element 200. Furthermore, the portion of the first lead wire 140a that crosses the heat exchange element 200 is covered by the elastic body 142.

[0040] (3) Procedure for housing the heat exchange element in the enclosure Figure 7 is a cross-sectional view showing the configuration of the housing 100. This is a cross-sectional view of CC in Figure 1. As described above, a top-side rail portion 152 is arranged on the top surface 110, and a bottom-side rail portion 154 is arranged on the bottom surface 112. In addition, a maintenance opening 124 is arranged on the first side surface 114a (not shown). Here, the end of the top-side rail portion 152 on the side of the first side surface 114a (maintenance opening 124) is indicated as the first end portion 300, and the end of the bottom-side rail portion 154 on the side of the first side surface 114a (maintenance opening 124) is indicated as the second end portion 302. The distance (shortest distance) between the first end portion 300 and the first side surface 114a (maintenance opening 124) is greater than the distance (shortest distance) between the second end portion 302 and the first side surface 114a (maintenance opening 124). In other words, the first end portion 300 is further away from the first side surface 114a (maintenance opening 124) than the second end portion 302.

[0041] As a result, when a heat exchange element 200 (not shown) is housed in the housing 100, the space enclosed by the top surface 110 and the upper end and first end 300 of the heat exchange element 200 is formed as an engagement recess 310. As will be described in detail later, a first lead wire 140a (not shown) is placed in the engagement recess 310. The width of the engagement recess 310 in the direction from the third side surface 114c to the fourth side surface 114d should be greater than or equal to the width of the base 160 of the top surface rail portion 152.

[0042] A lead wire locking portion 320 is positioned on the first side surface 114a (maintenance opening 124) side of the top surface 110, protruding from the top surface 110 towards the bottom surface 112. The lead wire locking portion 320 prevents the first lead wire 140a, which is positioned in the engagement recess 310, from moving toward the first side surface 114a (maintenance opening 124). The lead wire locking portion 320 may be fixed to the top surface 110 or may be rotatably fixed to the top surface 110.

[0043] The panel portion 120 is covered by a maintenance opening 124. At that time, an engaging projection 330 is provided on the surface of the panel portion 120 facing the maintenance opening 124, corresponding to the engaging recess 310. When the panel portion 120 covers the maintenance opening 124, the engaging projection 330 engages with the engaging recess 310.

[0044] Here, we will explain the procedure for housing the heat exchange element 200 in the housing 100 as described above. Figures 8(a)-(c) are cross-sectional views showing the procedure for housing the heat exchange element 200 in the housing 100. As shown in Figure 8(a), the third edge portion 216c of the heat exchange element 200 is brought into contact with the second end portion 302, while the first edge portion 216a of the heat exchange element 200 is not brought into contact with the first end portion 300. As a result, the heat exchange element 200 is positioned at an angle to the housing 100.

[0045] As shown in Figure 8(b), the lower surface 212 of the heat exchange element 200 is advanced into the top surface 110 while the upper surface 210 (not shown) of the heat exchange element 200 is rotated upward using the contact point between the third ridge portion 216c and the second end portion 302 as a pivot point, thereby bringing the first ridge portion 216a of the heat exchange element 200 into contact with the first end portion 300. In this state, the first ridge portion 216a is held by the top side rail portion 152, the second ridge portion 216b is held by the first side rail portion 156a, the third ridge portion 216c is held by the bottom side rail portion 154, and the fourth ridge portion 216d is held by the second side rail portion 156b. Furthermore, by advancing the lower surface 212 of the heat exchange element 200 into the top surface 110, the heat exchange element 200 is housed in the housing 100. As a result, the engagement recess 310 is formed.

[0046] As shown in Figure 8(c), the first lead wire 140a is inserted into the engagement recess 310. As a result, the first lead wire 140a passes through the engagement recess 310 and crosses over the upper end of the heat exchange element 200. Also, the outer circumference of the first lead wire 140a is covered by the elastic body 142 at the position corresponding to the engagement recess 310. In this state, when the maintenance opening 124 is covered by the panel portion 120, the engagement projection 330 engages with the engagement recess 310. At that time, the elastic body 142 wound around the first lead wire 140a is crushed by the engagement projection 330. In other words, the elastic body 142 is sandwiched between the tip of the engagement projection 330 and the first end portion 300 of the top rail portion 152. The airtightness of the engagement recess 310 is ensured by crushing the engagement projection 330 with the engagement projection 330 and the first end portion 300.

[0047] In this embodiment, since the ridge portion 216 of the heat exchange element 200 does not come into contact with the base portion 160 of the rail portion while it is held in place by the rail portion, deformation of the ridge portion 216 of the heat exchange element 200 housed in the heat exchange ventilation device 1000 can be suppressed. Furthermore, since deformation of the ridge portion 216 of the heat exchange element 200 is suppressed, air leakage through gaps can be suppressed. In addition, since air leakage through gaps is suppressed, a decrease in airtightness can be suppressed.

[0048] Furthermore, since the spacing between the tips 164 is shorter than the vertical length from the base 160 to the tips 164, contact between the ridge portion 216 and the base 160 can be suppressed. Also, since the spacing between the tips 164 is shorter than the depth of the base 160, contact between the ridge portion 216 and the base 160 can be suppressed. Also, even if the wall of the holding portion 162 is angled, the spacing between the tips 164 is shorter than the depth of the base 160, so contact between the ridge portion 216 and the base 160 can be suppressed. In addition, since the elastic body 166 included in the rail portion abuts against the ridge portion 216 of the heat exchange element 200, the ridge portion 216 bites into the elastic body 166, thereby covering the ridge portion 216 with the elastic body 166. Also, since the ridge portion 216 is covered with the elastic body 166, deformation of the ridge portion 216 can be suppressed.

[0049] Furthermore, since the distance between the tips 164 of the bottom rail section 154 is shorter than the distance between the tips 164 of the top rail section 152, even if a load equivalent to gravity is applied to the bottom rail section 154, it is possible to suppress the ridge portion 216 from contacting the base 160. Also, since the vertical length from the base 160 to the tip 164 of the top rail section 152 is longer than the vertical length from the base 160 to the tip 164 of the bottom rail section 154, even if the heat exchange element 200 sinks due to gravity, it is possible to suppress the ridge portion 216 from contacting the base 160. In addition, since the contact area between the elastic body 166 of the bottom rail section 154 and the heat exchange element 200 is larger than the contact area between the elastic body 166 of the top rail section 152 and the heat exchange element 200, the heat exchange element 200 can be protected by the elastic body 166 even if it sinks due to gravity.

[0050] Furthermore, the first end portion 300 on the first side surface 114a side of the top rail portion 152 is further away from the first side surface 114a than the second end portion 302 on the first side surface 114a side of the bottom rail portion 154, thus improving the ease of assembly of the heat exchange ventilation device 1000. Also, since the engaging recess 310 is filled with the first lead wire 140a, the elastic body 142, and the engaging projection 330, airtightness can be ensured. In addition, the housing protrudes from the top surface to the bottom surface, preventing the lead wire from moving toward the first side surface. Furthermore, since a lead wire locking portion 320 is provided on the top surface 110, it is possible to prevent the first lead wire 140a from coming out of the engaging recess 310 when attaching or detaching the heat exchange element 200. Also, since the lead wire locking portion 320 is rotatably fixed to the top surface 110, the attachment and detachment of the first lead wire 140a can be easily made. Furthermore, since the engaging projection 330 of the panel portion 120 engages with the engaging recess 310, airtightness can be ensured.

[0051] An overview of one aspect of this disclosure is as follows: (Item 1-1) A housing (100) including a bottom surface (112) and a top surface (110) that extend horizontally and face each other, and a plurality of side surfaces (114) that are connected to the bottom surface (112) and the top surface (110) and extend vertically, A rectangular prism-shaped heat exchange element (200) is housed within the aforementioned housing (100), The housing (100) includes a concave rail portion for holding the heat exchange element (200) within the housing, The heat exchange element (200) is housed in the housing (100) with its prismatic vertical ridge (216) facing the horizontal direction. The rail portion includes a base portion (160) and a holding portion (162) that protrudes from the base portion (160) as a pair of walls. The rail portion slidably holds the ridge portion (216) of the heat exchange element (200) at the tip of the holding portion (162), In the heat exchange element (200), the ridge portion (216) does not come into contact with the base portion (160) of the rail portion while the element is held in place by the rail portion, in a heat exchange type ventilation device (1000).

[0052] (Item 1-2) The aforementioned rail section is A heat exchange ventilation device (1000) according to item 1-1, wherein the distance between the tips of the holding portion (162) is shorter than the vertical length from the base portion (160) to the tip of the holding portion (162).

[0053] (Item 1-3) The aforementioned retaining portion (162) is The pair of walls project from the base (160) in the vertical direction so as to face each other. A heat exchange ventilation device (1000) as described in item 1-2, wherein the distance between the tips (164) of the holding portion (162) is shorter than the vertical length from the base (160) to the tip (164) of the holding portion (162).

[0054] (Items 1-4) The aforementioned retaining portion (162) is As the pair of walls move away from the base (160), the protrusions of the pair of walls protrude so that they move closer to each other. A heat exchange ventilation device (1000) as described in item 1-2, wherein the distance between the tips (164) of the holding portion (162) is shorter than the vertical length from the base (160) to the tip (164) of the holding portion (162).

[0055] (Items 1-5) The aforementioned rail section is The present invention further includes an elastic body (166) positioned between the base (160) and the tip (164) of the holding portion (162), The elastic body (166) abuts against the ridge portion (216) of the heat exchange element (200), as described in item 1-1, for the heat exchange type ventilation device (1000).

[0056] (Items 1-6) The rail portion includes a bottom-side rail portion (154) provided on the bottom surface (112) and a top-side rail portion (152) provided on the top surface (110). A heat exchange ventilation device (1000) as described in item 1-1, wherein the distance between the tips (164) of the retaining portion (162) of the bottom rail portion (154) is shorter than the distance between the tips (164) of the retaining portion (162) of the top rail portion (152).

[0057] (Items 1-7) The rail portion includes a bottom-side rail portion (154) provided on the bottom surface (112) and a top-side rail portion (152) provided on the top surface (110). A heat exchange ventilation device (1000) as described in item 1-1, wherein the vertical length from the base (160) of the top rail portion (152) to the tip (164) of the holding portion (162) is longer than the vertical length from the base (160) of the bottom rail portion (154) to the tip (164) of the holding portion (162).

[0058] (Items 1-8) The rail portion includes a bottom-side rail portion (154) provided on the bottom surface (112) and a top-side rail portion (152) provided on the top surface (110). The heat exchange type ventilation device (1000) described in item 1-5, wherein the contact area between the elastic body (166) of the bottom rail portion (154) and the heat exchange element (200) is larger than the contact area between the elastic body (166) of the top rail portion (152) and the heat exchange element (200).

[0059] (Item 2-1) A housing (100) including a bottom surface (112) and a top surface (110) facing each other, and a plurality of side surfaces (114) connected to the bottom surface (112) and the top surface (110), An air supply fan (170) is placed inside the housing (100) and transports the air supply flow, An exhaust fan (172) is placed inside the housing (100) and conveys the exhaust flow, A heat exchange element (200) is housed inside the housing (100) and exchanges heat between the supply airflow and the exhaust airflow, A top surface rail portion (152) is provided on the top surface (110) and holds the upper end of the heat exchange element (200), A bottom rail portion (154) is provided on the bottom surface (112) and holds the lower end of the heat exchange element (200), A control unit (122) that controls the operation of the air intake fan (170) and the exhaust fan (172), The heat exchange element (200) is wired across and connected to the control unit (122), and the lead wire (140) is also provided. If one of the aforementioned multiple sides (114) is defined as the first side (114a), then the side (114) opposite to the first side (114a) is defined as the second side (114b). The top rail portion (152) holds the upper end of the heat exchange element (200) so that it can slide between the first side surface (114a) and the second side surface (114b). The bottom rail portion (154) holds the lower end of the heat exchange element (200) so that it can slide between the first side surface (114a) and the second side surface (114b). The first end portion (300) on the first side surface (114a) side of the top rail portion (152) is further away from the first side surface (114a) than the second end portion (302) on the first side surface (114a) side of the bottom rail portion (154). The housing (100) is A maintenance opening (124) for housing the heat exchange element (200) from the first side (114a) side, A panel section (120) for opening and closing the aforementioned maintenance opening (124), The system includes an engaging recess (310) which is a space surrounded by the top surface (110), the upper end of the heat exchange element (200), and the first end (300) of the top surface side rail portion (152), The aforementioned lead wire (140) is The upper end of the heat exchange element (200) is crossed through the engagement recess (310), A heat exchange ventilation device (1000) comprising an elastic body (142) that covers the outer circumference of the lead wire (140) at a position corresponding to the engagement recess (310).

[0060] (Item 2-2) The heat exchange ventilation device (1000) described in item 2-1 further comprises a lead wire locking portion (320) that protrudes from the top surface (110) toward the bottom surface (112) and prevents the lead wire (140) from moving toward the first side surface (114a).

[0061] (Item 2-3) The lead wire locking portion (320) is rotatably fixed to the top surface (110) of the heat exchange ventilation device (1000) described in item 2-2.

[0062] (Item 2-4) The aforementioned panel portion (120) is The engagement projection (330) is provided which protrudes in correspondence with the engagement recess (310), The elastic body (142) is A heat exchange ventilation device (1000) as described in item 2-1, which is held between the tip of the engaging projection (330) and the first end (300) of the top rail portion (152).

[0063] (Item 2-5) A housing (100) including a bottom surface (112) and a top surface (110) facing each other, and a plurality of side surfaces (114) connected to the bottom surface (112) and the top surface (110), An air supply fan (170) is placed inside the housing (100) and transports the air supply flow, An exhaust fan (172) is placed inside the housing (100) and conveys the exhaust flow, A heat exchange element (200) is housed inside the housing (100) and exchanges heat between the supply airflow and the exhaust airflow, A top surface rail portion (152) is provided on the top surface (110) and holds the upper end of the heat exchange element (200), A bottom rail portion (154) is provided on the bottom surface (112) and holds the lower end of the heat exchange element (200), A control unit (122) that controls the operation of the air intake fan (170) and the exhaust fan (172), The heat exchange element (200) is wired across and connected to the control unit (122), and the lead wire (140) is also provided. If one of the aforementioned multiple sides (114) is defined as the first side (114a), then the side (114) opposite to the first side (114a) is defined as the second side (114b). The top rail portion (152) holds the upper end of the heat exchange element (200) so that it can slide between the first side surface (114a) and the second side surface (114b). The bottom rail portion (154) holds the lower end of the heat exchange element (200) so that it can slide between the first side surface (114a) and the second side surface (114b). From the first end (300) on the first side surface (114a) side of the top side rail portion (152), the second end (302) on the first side surface (114a) side of the bottom side rail portion (154) separates from the first side surface (114a). The housing (100) is A maintenance opening (124) for housing the heat exchange element (200) from the first side (114a) side, A panel section (120) for opening and closing the aforementioned maintenance opening (124), The system includes an engagement recess (310) which is a space surrounded by the bottom surface (112), the lower end of the heat exchange element (200), and the second end (302) of the bottom surface side rail portion (154), The aforementioned lead wire (140) is The lower end of the heat exchange element (200) is crossed through the engagement recess (310), A heat exchange ventilation device (1000) comprising an elastic body (142) that covers the outer circumference of the lead wire (140) at a position corresponding to the engagement recess (310).

[0064] (Item 2-6) The heat exchange ventilation device (1000) according to item 2-5, further comprising a lead wire locking portion (320) that protrudes from the bottom surface (112) toward the top surface (110) and prevents the lead wire (140) from moving toward the first side surface (114a).

[0065] (Item 2-7) The lead wire locking portion (320) is rotatably fixed to the bottom surface (112), as described in item 2-6, for the heat exchange ventilation device (1000).

[0066] (Item 2-8) The aforementioned panel portion (120) is The engagement projection (330) is provided which protrudes in correspondence with the engagement recess (310), The elastic body (142) is A heat exchange ventilation device (1000) as described in item 2-5, which is held between the tip of the engaging projection (330) and the second end (302) of the bottom rail portion (154).

[0067] Although the present disclosure has been explained based on the above examples, it can be easily inferred that the present disclosure is not limited in any way to the above examples, and that various improvements and modifications are possible without departing from the spirit of the present disclosure.

[0068] In this embodiment, the first end 300 on the first side surface 114a side of the top rail portion 152 is further away from the first side surface 114a than the second end 302 on the first side surface 114a side of the bottom rail portion 154, and an engagement recess 310 is provided on the top surface 110. In addition, a lead wire locking portion 320 is provided on the top surface 110. However, this is not limited to this, for example, the second end 302 on the first side surface 114a side of the bottom rail portion 154 may be further away from the first side surface 114a than the first end 300 on the first side surface 114a side of the top rail portion 152. In this case, an engagement recess 310 is provided on the bottom surface 112, and a lead wire locking portion 320 is provided on the bottom surface 112. In other words, the top surface 110 and the bottom surface 112 may be configured in reverse. This modified example improves the degree of freedom in configuration. [Explanation of symbols]

[0069] 100 Housing, 110 Top surface, 112 Bottom surface, 114 Side surface, 120 Panel section, 122 Control section, 124 Maintenance opening, 126 Lead wire outlet opening, 130 Outside air vent, 132 Intake air vent, 134 Inside air vent, 136 Exhaust vent, 140 Lead wire, 142 Elastic body, 150 Base, 152 Top side rail section, 154 Bottom side rail section, 156 Side side rail section, 160 Base section, 162 Holding section, 164 Tip, 166 Elastic body, 170 Intake fan, 172 Exhaust fan, 180 Boundary wall, 182 Intake airflow region, 184 Exhaust airflow region, 200 Heat exchange element, 210 Top surface, 212 Bottom surface, 214 Side surface, 216 Ridge section, 300 First end, 302 Second end, 310 Engaging recess, 320 Lead wire locking section, 330 Engaging protrusion, 1000 Heat exchange type ventilation device.

Claims

1. A housing including a bottom surface and a top surface facing each other, and a plurality of sides connected to the bottom surface and the top surface, An air supply fan is placed inside the aforementioned housing and transports the airflow, An exhaust fan is placed inside the aforementioned housing and conveys the exhaust airflow, A heat exchange element housed inside the aforementioned housing, which exchanges heat between the supply airflow and the exhaust airflow, A top surface rail portion provided on the top surface and holding the upper end of the heat exchange element, A bottom rail portion provided on the bottom surface and holding the lower end of the heat exchange element, A control unit that controls the operation of the air intake fan and the exhaust fan, The system includes a lead wire that is wired across the heat exchange element and connected to the control unit, If one of the aforementioned multiple sides is defined as the first side, then the side opposite to the first side is defined as the second side. The top rail portion holds the upper end of the heat exchange element so that it can slide between the first side and the second side. The bottom rail portion holds the lower end of the heat exchange element so that it can slide between the first side and the second side. The first end of the first side of the top rail portion is further away from the first side than the second end of the first side of the bottom rail portion. The aforementioned enclosure is A maintenance opening for housing the heat exchange element from the first side, A panel section for opening and closing the aforementioned maintenance opening, The system includes an engagement recess which is a space enclosed by the top surface, the upper end of the heat exchange element, and the first end of the top surface side rail portion, The aforementioned lead wire is The upper end of the heat exchange element is crossed through the engagement recess, A heat exchange ventilation device comprising an elastic body covering the outer circumference of the lead wire at a position corresponding to the engagement recess.

2. The heat exchange ventilation device according to claim 1, wherein the housing further comprises a lead wire locking portion that protrudes from the top surface toward the bottom surface and prevents the lead wire from moving toward the first side surface.

3. The heat exchange ventilation device according to claim 2, wherein the lead wire locking portion is rotatably fixed to the top surface.

4. The aforementioned panel section is It is equipped with an engaging projection that protrudes corresponding to the engaging recess, The elastic body is The heat exchange ventilation device according to claim 1, which is held between the tip of the engaging projection and the first end of the top surface rail portion.

5. A housing including a bottom surface and a top surface facing each other, and a plurality of sides connected to the bottom surface and the top surface, An air supply fan is placed inside the aforementioned housing and transports the airflow, An exhaust fan is placed inside the aforementioned housing and conveys the exhaust airflow, A heat exchange element housed inside the aforementioned housing, which exchanges heat between the supply airflow and the exhaust airflow, A top surface rail portion provided on the top surface and holding the upper end of the heat exchange element, A bottom rail portion provided on the bottom surface and holding the lower end of the heat exchange element, A control unit that controls the operation of the air intake fan and the exhaust fan, The system includes a lead wire that is wired across the heat exchange element and connected to the control unit, If one of the aforementioned multiple sides is defined as the first side, then the side opposite to the first side is defined as the second side. The top rail portion holds the upper end of the heat exchange element so that it can slide between the first side and the second side. The bottom rail portion holds the lower end of the heat exchange element so that it can slide between the first side and the second side. From the first end on the first side of the top rail portion, the second end on the first side of the bottom rail portion separates from the first side. The aforementioned enclosure is A maintenance opening for housing the heat exchange element from the first side, A panel section for opening and closing the aforementioned maintenance opening, The system includes an engagement recess which is a space enclosed by the bottom surface, the lower end of the heat exchange element, and the second end of the bottom surface side rail portion, The aforementioned lead wire is The lower end of the heat exchange element is crossed through the engagement recess, A heat exchange ventilation device comprising an elastic body covering the outer circumference of the lead wire at a position corresponding to the engagement recess.

6. The heat exchange ventilation device according to claim 5, wherein the housing further comprises a lead wire locking portion that protrudes from the bottom surface toward the top surface and prevents the lead wire from moving toward the first side surface.

7. The heat exchange ventilation device according to claim 6, wherein the lead wire locking portion is rotatably fixed to the bottom surface.

8. The aforementioned panel section is It is equipped with an engaging projection that protrudes corresponding to the engaging recess, The elastic body is The heat exchange ventilation device according to claim 5, which is held between the tip of the engaging projection and the second end of the bottom rail portion.

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