Ventilation system, interior windows, double-glazed windows

Abstract

To provide a ventilation device allowing 24-hours ventilation.SOLUTION: A ventilation device is provided with an outer peripheral side frame 65 and an inner peripheral side frame 66, wherein a ventilation passage 67 in communication with the outdoor side and the indoor side of a room is formed between the outer peripheral side frame 65 and the inner peripheral side frame 66, a heat-foaming material 80a is arranged at a place near the outdoor side of either of the outer peripheral side frame 65 and the inner peripheral side frame 66 to seal outdoor side openings 76, 78 of a ventilation passage 67 over its length upon fire, and a heat-foaming material 80b is arranged at a place near the indoor side of the outer peripheral side frame 65 and the inner peripheral side frame 66 to seal an indoor side opening 79 of a ventilation passage 67 over its length upon fire.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ventilation device, and an inner window and a double-glazed window equipped with the ventilation device. [Background technology]

[0002] The indoor environment of the building was controlled by air conditioning equipment, but a lot of heat was released in and out through the windows, which increased electricity bills, so there was a need for windows that could help reduce electricity bills. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the above-mentioned circumstances, the present invention aims to provide a ventilation device capable of ventilating 24 hours a day, and an inner window and a double-glazed window equipped with the ventilation device. [Means for solving the problem]

[0004] In order to achieve the above object, the ventilation device according to the invention described in claim 1 comprises an outer circumferential frame and an inner circumferential frame, and a ventilation path communicating between the inside and outside of the room is formed between the outer circumferential frame and the inner circumferential frame, Inner frame Located near the outside of the room Outer frame The fire extinguisher has a protruding piece that protrudes toward the outside, and a heated foam material is provided along the entire length of the indoor side of the protruding piece to block the outdoor opening of the ventilation path in the event of a fire. Inner frame Located closer to the interior Outer frame It has a protruding piece that protrudes toward the outside of the room, and a heated foam material is provided along its entire length on the outside of the protruding piece to block the opening on the inside of the ventilation path in the event of a fire.

[0005] The ventilation device according to the invention described in claim 2 comprises an outer circumferential frame, an inner circumferential frame, and connecting members, the connecting members being arranged at intervals in the longitudinal direction and connecting the outer circumferential frame and the inner circumferential frame, and a ventilation path communicating between the inside and outside of the room is formed between the outer circumferential frame and the inner circumferential frame, Inner frame Located near the outside of the room Outer frameThe fire extinguisher has a protruding piece that protrudes toward the outside, and a heated foam material is provided along the entire length of the indoor side of the protruding piece to block the outdoor opening of the ventilation path in the event of a fire. Inner frame Located closer to the interior Outer frame It has a protruding piece that protrudes toward the outside of the room, and a heated foam material is provided along its entire length on the outside of the protruding piece to block the opening on the inside of the ventilation path in the event of a fire.

[0006] The inner window according to the invention described in claim 3 is characterized in that it is provided with the ventilation device described in claim 1 or claim 2 on the outer periphery of the window.

[0007] The double-glazed window according to the invention described in claim 4 comprises an outer window and an inner window, and is characterized by having the ventilation device described in claim 1 or claim 2 on the outer periphery of the inner window. [Effects of the Invention]

[0008] The ventilation device according to the invention of claim 1 comprises an outer circumferential frame and an inner circumferential frame, and a ventilation path communicating between the inside and outside of the room is formed between the outer circumferential frame and the inner circumferential frame, Inner frame Located near the outside of the room Outer frame The fire extinguisher has a protruding piece that protrudes toward the outside, and a heated foam material is provided along the entire length of the indoor side of the protruding piece to block the outdoor opening of the ventilation path in the event of a fire. Inner frame Located closer to the interior Outer frame It has a protruding piece that protrudes toward the outside of the room, and a heated foam material is provided along its entire length on the outside of the protruding piece to block the opening on the inside of the ventilation path in the event of a fire, thereby providing fire prevention performance.

[0009] The ventilation device according to the invention described in claim 2 comprises an outer circumferential frame, an inner circumferential frame, and connecting members, the connecting members being arranged at intervals in the longitudinal direction and connecting the outer circumferential frame and the inner circumferential frame, and a ventilation path communicating between the inside and outside of the room is formed between the outer circumferential frame and the inner circumferential frame, Inner frame Located near the outside of the room Outer frame The fire extinguisher has a protruding piece that protrudes toward the outside, and a heated foam material is provided along the entire length of the indoor side of the protruding piece to block the outdoor opening of the ventilation path in the event of a fire. Inner frame Located closer to the interior Outer frameIt has a protruding piece that protrudes toward the outside of the room, and a heated foam material is provided along its entire length on the outside of the protruding piece to block the opening on the inside of the ventilation path in the event of a fire, thereby providing fire prevention performance.

[0010] The inner window according to the invention of claim 3 is equipped with the ventilation device according to claim 1 or 2 on the outer periphery of the window, which allows air to circulate between the indoor and outdoor areas through the ventilation path of the ventilation device, thereby contributing to reducing electricity costs. In addition, in the event of a fire, the openings on the outdoor and indoor sides of the ventilation path are blocked with heated foam material, thereby demonstrating fire prevention performance.

[0011] The double-glazed window according to the invention of claim 4 comprises an outer window and an inner window, and by equipping the ventilator of claim 1 or 2 on the outer periphery of the inner window, air flows between the indoor and outdoor spaces through the ventilation path of the ventilation device, contributing to reducing electricity costs. In addition, in the event of a fire, the openings on the outdoor and indoor sides of the ventilation path are blocked with heated foam material, demonstrating fire prevention performance. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a longitudinal sectional view showing a first embodiment of a ventilation device according to the present invention. [Figure 2] 1 is a vertical cross-sectional view showing an embodiment of a double-glazed window according to the present invention. [Figure 3] FIG. [Figure 4] 3 is an enlarged vertical cross-sectional view showing a portion of the upper frame side of the outer window of the double-glazed window shown in FIG. 2. FIG. [Figure 5] FIG. 5 is a view taken along the arrow A in FIG. 4. [Figure 6] FIG. 5 is a view taken along arrow B in FIG. 4. [Figure 7] (a) is a side view of the ventilation frame body, (b) is an outdoor side view of the ventilation frame body, and (c) is an indoor side view of the ventilation frame body. [Figure 8] 1 is a longitudinal cross-sectional view of the ventilation device of the first embodiment, showing a state when the heated foaming material foams in the event of a fire. FIG. [Figure 9] FIG. 4 is a longitudinal sectional view showing a second embodiment of the ventilation device of the present invention. [Figure 10]FIG. 2 is a longitudinal cross-sectional view of the ventilation device, showing the state when the heated foam material foams in the event of a fire. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 shows a first embodiment of a ventilation device 64 of the present invention, and Figs. 2 to 4 show one embodiment of a double-glazed window of the present invention. This double-glazed window comprises an outer window 13 installed on the outside of a window opening in a building, and an inner window 14 installed on the inside of the window opening.

[0014] As shown in Figures 2 and 3, the exterior window 13 comprises a frame 18 formed by an upper frame 15, a lower frame 16, and left and right vertical frames 17, 17 made of aluminum extrusions; an outer shoji screen 19a and an inner shoji screen 19b that are slidable along the upper and lower frames 15, 16; and a ventilation frame 1 attached to the outer periphery of the upper frame 15. The frame 18 is the same as that of a typical sliding sash used in buildings. As shown in Figures 2 and 4, the ventilation frame 1 has a ventilation path 2 that connects the outside to the inside of the room (intermediate layer 20 between the exterior and interior windows).

[0015] The ventilated frame 1 consists only of a horizontal frame, and as shown in Figure 4, has a ventilated frame body 21, an outdoor cover material (cover material) 3 attached to the outdoor side of the ventilated frame body 21, and an indoor cover material 22 attached to the indoor side of the ventilated frame body 21. The outdoor cover material 3 forms an outdoor space 23 on the outdoor side of the ventilated frame 1, the ventilated frame body 21 forms an intermediate space 24 in the middle between the indoor and outdoor areas, and the indoor cover material 22 forms an indoor space 25 on the indoor side. The ventilated frame body 21, the outdoor cover material 3, and the indoor cover material 22 are all long members made of aluminum extrusions. Side panels 26 are attached to both longitudinal ends of the ventilated frame 1.

[0016] As shown in Figure 4, the outdoor covering material 3 has a front wall 4 and a front wall 5. The front wall 5 is located 15 mm above the bottom edge of the front wall 4. The front wall 5 has ventilation holes 6a that open toward the inside periphery and communicate with the outdoors. As shown in Figure 5, the ventilation holes 6a are roughly rectangular elongated holes, and multiple ventilation holes 6a are formed at intervals along the longitudinal direction. The ventilation holes 6a are made as large as possible in the front direction, and the spacing between them is made shorter than the left-to-right dimension of the ventilation holes 6a, so that the ventilation holes 6a occupy more than half of the area of ​​the front wall 5. Even though the ventilation holes 6a are formed large in this way in the front wall 5, the front wall 4 hangs down on the outdoor side of the ventilation holes 6a, as shown in Figure 4, preventing rainwater from entering through the ventilation holes 6a. An insect screen 27 is attached to the upper surface of the front wall 5 to prevent insects from entering through the ventilation openings 6a. The insect screen 27 is made of stainless steel wire mesh, and both ends facing the inside and outside of the room are attached by engaging with grooves 28 formed opposite each other on the upper surface of the front wall 5. The left and right ends of the front wall 5 are fastened to metal fittings 29 attached to the side panels 26 with screws 32 from below. A fitting groove 30 with a roughly C-shaped cross section is formed on the indoor side of the upper end of the visible wall 4, and a hinge section 7 is formed by fitting this fitting groove 30 from the outside of the room onto a shaft section 31 formed on the outside of the room of the ventilation frame main body 21. When the screws 32 are removed, the outdoor cover material 3 becomes free to rotate to the outside of the room with the hinge section 7 as a fulcrum, as shown by the imaginary line in Figure 4.

[0017] As shown in FIG. 4, the ventilation frame body 21 has an intermediate space 24 formed by an upper wall 33, a lower wall 34, an exterior facing wall 10, and an interior facing wall 11. A large ventilation opening 6b is formed in the exterior facing wall 10. As shown in FIG. 7(b), the ventilation openings 6b are roughly rectangular elongated holes, and multiple ventilation openings 6b are formed at intervals along the longitudinal direction. The vertical dimension of the ventilation openings 6b is made as large as possible, and the intervals between the ventilation openings 6b are made shorter than the left-right dimension of the ventilation openings 6b, so that the ventilation openings 6b occupy most of the area of ​​the facing wall 10. An insect screen 27 can also be attached to the exterior surface of the exterior facing wall 10. As shown in FIG. 4, a water-repelling piece 36 that protrudes toward the outside of the room is provided at a position adjacent to and below the ventilation opening 6b, and the water-repelling piece 36 prevents rainwater from entering the ventilation opening 6b. As shown in Figures 4 and 7(c), a plurality of narrow, elongated ventilation holes 6c are formed at intervals in the longitudinal direction in the interior-side visible wall 11. The ventilation holes 6c in the interior-side visible wall 11 are smaller than the ventilation holes 6b in the exterior-side visible wall 10. Therefore, the total area of ​​the ventilation holes 6c in the interior-side visible wall 11 is smaller than the total area of ​​the ventilation holes 6b in the exterior-side visible wall 10. The lower wall 34 is provided with an inclined surface 37 that is inclined so that the outdoor side is lower.

[0018] As described above, the ventilation frame 1 has large ventilation openings 6a and 6b formed in the front wall 5 of the exterior cover material 3 and the exterior facing wall 10 of the ventilation frame main body 21, and a small ventilation opening 6c formed in the interior facing facing wall 11 of the ventilation frame main body 21, so that the exterior space 23 and the intermediate space 24 are at the same pressure as the outside air. This prevents rainwater from being sucked into the ventilation path 2 due to the difference in pressure between the inside and outside, and even if some rainwater seeps in through the ventilation openings 6a and 6b, it is quickly drained out through the exterior ventilation opening 6a. The air pressure in the interior space 25 is close to that inside the room.

[0019] As shown in Figure 4, the upper wall 33 protrudes further outside than the exterior-side visible wall 10, and the protruding portion is inclined so that the exterior side is lower, with the tip curved downward. The shaft portion 31 to which the outdoor cover material 3 is connected is provided below and spaced apart from the upper wall 33, and the tip of the upper wall 33 forms a eaves 38 that covers the hinge portion 7. This prevents rainwater from entering through the hinge portion 7. At the middle position between the indoor and outdoor sides of the upper wall 33, there is a protruding piece 39 that protrudes outward, and on the indoor side thereof there is a locking portion 41 of an anchor 40, and the ventilated frame 1 is fixed to a frame 42 by the anchor 40 that is locked to the locking portion 41. The gap between the ventilated frame main body 21 and the frame 42 is sealed by filling a sealing material 43 from the outdoor side. A hollow protrusion 44 is formed on the underside of the ventilation frame body 21, closer to the indoor side, and the underside of the protrusion 44 has an engagement piece 46 that engages with an anchor engagement part 45 of the upper frame 15, and a screw fastening piece 47 for screwing the upper frame 15. The ventilation frame body 21 is connected to the upper frame 15 by engaging the engagement piece 46 with the anchor engagement part 45 of the upper frame 15, screwing the protrusion 48 of the upper frame 15 to the outdoor wall of the protrusion 44 with a screw 49 from the outdoor side, and screwing the screw fastening piece 47 to the upper frame 15 with a screw 50 from the indoor side. The gap between the upper frame 15 and the ventilation frame body 21 is sealed from the outdoor side by filling with a sealant 51, the sealant 51 being located indoors relative to the outdoor vent 6a. The filling operation of the sealing material 51 can be carried out in a state where the outdoor cover material 3 is rotated to the outdoor side with the hinge portion 7 as a fulcrum, as shown by the two-dot chain line in the figure.

[0020] As shown in Figure 4, the indoor-side cover material 22 is formed by combining two members 22a, 22b with a generally L-shaped cross section to form a hollow rectangular cross section. The exterior wall 52 of the outdoor-side member 22a has a vent hole 6d that communicates with the vent hole 6c in the ventilation frame body 21. The exterior wall 8 of the outdoor-side member 22a and the exterior wall 9 of the resin cover 53 attached below it have downward-facing vent holes 6e, 6f. As shown in Figure 6, the vent holes 6e, 6f are small slits, spaced apart longitudinally. Between the upper and lower vent holes 6e, 6f, as shown in Figures 4 and 6, a shutter plate 55 is provided that can be slid left and right by operating a knob 54 to open and close the vent holes 6e, 6f. A filter 75 also prevents the entry of dust, pollen, and other particles.

[0021] As shown in Figure 4, a plate-shaped air conditioner 56 is detachably attached to the indoor side of the indoor-side cover material 22 with a knob bolt 57 attached from the indoor side. The lower part of the air conditioner 56 is slightly bent toward the outside, so that the air flowing out from the indoor-side vent 6f is bent toward the outside and directed along the glass surfaces of the shoji screens 19a, 19b of the exterior window 13.

[0022] As described above, the ventilation frame 1 has a ventilation path 2 connecting the inside and outside of the room formed in a curved U-shape by the ventilation opening 6a provided in the visible wall 5 of the outdoor cover material 3, the ventilation openings 6b, 6c provided in the visible walls 10, 11 on the outdoor and indoor sides of the ventilation frame main body 21, the ventilation opening 6d provided in the visible wall 52 of the indoor cover material 22, and the ventilation openings 6e, 6f provided in the visible walls 8, 9 of the indoor cover material 22 and the resin cover 53 (see Figure 4). The fact that the ventilation path 2 is curved in a U-shape in this way is itself effective in preventing rainwater from entering, but this ventilation frame 1 more reliably prevents rainwater from entering by extending the visible wall 4 of the outdoor cover material 3 below the visible wall 5 in which the ventilation opening 6a is provided, and by providing a water-repellent piece 36 that protrudes to the outside of the room adjacent to the bottom of the ventilation opening 6b formed in the outdoor visible wall 10 of the ventilation frame main body 21. Furthermore, in this ventilation frame 1, the total area of ​​the ventilation openings 6c in the visible wall 11 on the indoor side of the ventilation frame body 21 is smaller than the total area of ​​the ventilation openings 6b in the visible wall 10 on the outdoor side, which reduces the pressure difference between the outdoor space 23 and the outside of the intermediate space 24, preventing rainwater from being sucked into the ventilation path 2 due to the pressure difference between inside and outside, and even if rainwater enters the ventilation path 2 during bad weather, it is drained out through the ventilation openings 6a on the outdoor side.

[0023] In addition, in this ventilated frame 1, the outdoor covering material 3 can be rotated to the outside of the room around a hinge portion 7 provided at the top of the facing wall 4 as a fulcrum, and rotating the outdoor covering material 3 to the outside of the room makes it easy to perform maintenance inside the ventilated frame 1, such as replacing the insect screen 27. Furthermore, rotating the outdoor covering material 3 to the outside of the room also makes it easy to fill the gap between the ventilated frame main body 21 and the upper frame 15 with sealing material 51. Because the outdoor covering material 3 is connected to the ventilated frame main body 21 at the hinge portion 7, the outdoor covering material 3 will not fall off when performing the above-mentioned maintenance work on the ventilated frame 1 or the work of sealing between the ventilated frame main body 21 and the upper frame 15, making the work easier.

[0024] As shown in Figures 2 and 3, the inner window 14 comprises an upper frame 59 and a lower frame 60 attached to the inner side of a four-sided frame 58, left and right vertical frames 61, 61, and an outer shoji screen 62a and an inner shoji screen 62b housed between the upper and lower frames 59, 60 in a sliding manner so that they can be opened and closed freely. The frames 59, 60, 61 and the frames of the shoji screens 62a, 62b are made of resin. The glass 63 of the shoji screens 62a, 62b is double-glazed.

[0025] As shown in Figure 2, the inner window 14 is provided with a ventilation device 64 on the outer periphery of the upper frame 59. As shown in Figure 1, the ventilation device 64 is configured by combining an outer periphery frame 65 and an inner periphery frame 66 made of aluminum extrusions one above the other, and a ventilation path 67 is provided between the outer periphery frame 65 and the inner periphery frame 66, communicating between the inside and outside of the room. The inner frame 66 has projections 68a, 68b that protrude upward at the outdoor end and the indoor end, and an outdoor opening 76 is formed in the longitudinal direction between the outdoor projection 68a and the outer frame 65, and an indoor opening 77 is formed in the longitudinal direction between the indoor projection 68b and the outer frame 65. A straightening plate 70 is attached to and hangs down from the outer peripheral frame 65 at its outdoor end, facing the outdoor side of the outdoor opening 76. Two connecting walls 71a, 71b hang down from the outer peripheral frame 65 between the outdoor opening 76 and the indoor vent 77, and the tips of the connecting walls 71a, 71b engage with grooves 72 formed in the upper surface of the inner peripheral frame 66, thereby connecting the outer peripheral frame 65 and the inner peripheral frame 66. A plurality of outdoor openings 78 are formed in the outdoor connecting wall 71a at intervals along the longitudinal direction. A plurality of indoor openings 79 are formed in the indoor connecting wall 71b at intervals along the longitudinal direction.

[0026] As shown in Fig. 1, in this ventilation device 64, a heat-foaming material 80a that foams and expands due to the heat of a fire is provided along the entire longitudinal length of the upper surface adjacent to the indoor side of the outdoor-side protrusion 68a of the inner circumferential frame 66. In the event of a fire, as shown in Fig. 8, this heat-foaming material 80a foams and expands to fill the space between the protrusion 68a and the connecting wall 71a, and the foamed and expanded heat-foaming material 80a blocks the outdoor openings 76, 78. As shown in FIG. 1, in this ventilation device 64, a heated foam material 80b is provided along the entire longitudinal length of the outdoor surface of the indoor-side protrusion 68b of the inner frame 66 so as to face the indoor side of the indoor opening 79. In the event of a fire, as shown in FIG. 8, this heated foam material 80b foams and expands to fill the space between the protrusion 68b and the connecting wall 71b, and the foamed and expanded heated foam material 80b blocks the indoor opening 79. The outdoor openings 76 and 78 located closer to the outdoor side in the ventilation path 67 and the indoor opening 79 located closer to the indoor side are blocked by the heated foam materials 80a and 80b, thereby preventing the passage of flames and smoke from the ventilation path 67 and preventing the spread of fire.

[0027] In the above-described embodiment, both the outdoor opening 76 and the outdoor opening 78 are blocked with the heated foam material 80a, but it is also possible to block only one of the outdoor opening 76 and the outdoor opening 78. Furthermore, in the above-described embodiment, heated foam materials 80a, 80b are provided on both the outdoor and indoor sides of ventilation path 67, so that both the outdoor openings 76, 78 and the indoor opening 79 are blocked by heated foam materials 80a, 80b in the event of a fire. However, heated foam materials may be provided only on either the outdoor or indoor side of ventilation path 67, so that only the outdoor openings 76, 78 or the indoor opening 79 is blocked by heated foam material in the event of a fire. Even in this case, ventilation path 67 is blocked by heated foam materials in the event of a fire, so that the transmission of flames and smoke from ventilation path 67 can be prevented. Furthermore, if heated foaming materials 80a, 80b are provided on both the outdoor and indoor sides of the ventilation device 67 as in the embodiment, when a fire breaks out on the outdoor side, the heated foaming material 80a on the outdoor side will quickly foam to block the outdoor openings 76, 78, and when a fire breaks out on the indoor side, the heated foaming material 80b on the indoor side will quickly foam to block the indoor opening 79, thereby blocking the ventilation path 67 at an early stage in the event of a fire and reliably preventing the spread of flames and smoke.

[0028] As shown in Figure 1, the ventilation device 64 is attached to the main frame (frame) 58 with screws 81a and 81b inserted from the inside of the outer frame 65. The screws 81a and 81b are arranged at two locations, spaced apart in the longitudinal direction: between the baffle plate 70 and the outdoor connecting wall 71a, and between the outdoor connecting wall 71a and the indoor connecting wall 71b. A steel plate 82 is arranged along the entire longitudinal length between the outdoor connecting wall 71a and the indoor connecting wall 71b, and the steel plate 82 presses the outer frame 65 against the main frame 58 via the screws 81b. This prevents the outer frame 65 from undulating due to the heat of the fire during a fire, creating a gap between the outer frame 65 and the main frame 58. Heat-forming foam materials 83a, 83b are provided along the entire length of the outer peripheral side surface of outer peripheral frame 65 at two positions, one near the outdoor side and one near the indoor side. As a result, even if outer peripheral frame 65 is deformed by the heat of a fire and a gap is created between it and main body 58, the gap can be blocked by heat-forming foam materials 83a, 83b to prevent the passage of flames and smoke. Note that heat-forming materials 83a, 83b do not necessarily have to be provided on both the outdoor side and the indoor side, and may be provided on only one side.

[0029] As described above, the inner window 14 is provided with fire protection in the ventilation device 64, and the inner window 14 itself is also provided with fire protection. Specifically, as shown in Figures 1 and 2, the upper frame 59 and lower frame 60 have rails 98a, 98b that guide the shoji screens 62a, 62b. The rails 98a, 98b are made of thick rail components 99, which are made of aluminum sections with a U-shaped cross section, to prevent the rails from deforming in the event of a fire. Heat-forming material 100 is provided on the inner peripheral side of the rail components 99, and in the event of a fire, as shown in Figure 8, this heat-forming material 100 foams and expands to seal the gap between the upper frame 59 and the shoji screens 62a, 62b. Heat-forming material 101 is also provided on the outer peripheral side of the upper frame 59 and lower frame 60, on both the indoor and outdoor sides. Heat-forming material 109 is also provided on the outer peripheral side of the rail components 99, on both the indoor and outdoor sides. Even if the upper frame 59 made of resin melts in the event of a fire, these heated foaming materials 101, 109 foam and expand, thereby preventing a gap from being formed between the inner periphery frame 66 of the ventilation device 64 and the rail constituent material 99. As shown in Fig. 1, heated foaming material 103 is provided in rail-swallowing grooves 102 in the upper and lower frames of the shoji screens 62a and 62b, and in the event of a fire, as shown in Fig. 8, this heated foaming material 103 foams and expands to fill the rail-swallowing grooves 102. As shown in Fig. 1, a stopper 108 is attached to the upper frame 59 to prevent the inner shoji screen 62b from floating up and coming off the frame. 3, heat-foaming materials 104, 105 are also provided at the joints of the inner and outer shoji screens 62a, 62b, and between the door stiles of the inner and outer shoji screens 62a, 62b and the vertical frame 61. Each stile of the inner and outer shoji screens 62a, 62b is reinforced by inserting a metal reinforcing material 106 into the hollow portion, and the reinforcing material 106 is provided with a heat-foaming material 107.

[0030] 9 shows a second embodiment of a ventilation device 64 of the present invention. The ventilation device 64 has an outer circumferential frame 65, an inner circumferential frame 66, and a connecting member 84. The outer peripheral frame 65 is formed from an aluminum extrusion and has an outdoor fold 85a that protrudes downward at its outdoor end, and an indoor fold 86a that has a quarter-circular arc shape and protrudes downward while curving downward toward the outside of the room at its indoor end. A downward protrusion 87 is formed at a position spaced from the outdoor fold 85a toward the indoor side, and the protrusion 87 and the tip of the indoor fold 86a position the connecting material 84 in the forward direction. The inner frame 66 is also made of aluminum and has an exterior fold 85b that protrudes upward at its exterior end, and an interior fold 86b that protrudes upward at its interior end. Furthermore, a hollow trapezoidal protrusion 88 that protrudes upward is formed in the center of the interior / exterior direction. The upper frame 59 of the inner window 14 is attached to the inner frame 66 from below with screws 89, the tips of which fit within the hollow of the protrusion 88.

[0031] A plurality of connecting members 84 are arranged at intervals along the longitudinal direction of the outer frame 65 and the inner frame 66, connecting the outer frame 65 and the inner frame 66. The connecting members 84 are piece-shaped members formed by bending a steel plate. As shown in FIG. 9 , the connecting members 84 have a generally C-shaped cross section in side view, including an upper wall 90, a front wall 91, a rear wall 92, and a lower wall 93, and do not have walls on either the left or right side. That is, the connecting members 84 are formed only by walls 90, 91, 92, and 93 along the left-right direction, and have an open shape in the left-right direction without any walls blocking the left-right direction. The lower wall 93 is discontinued in the center in the indoor / outdoor direction, and the protrusion 88 of the inner frame 66 is located at the discontinued portion. As shown in Figure 9, the connecting material 84 is positioned in the prospective direction by the protrusion 87 of the outer frame 65 and the indoor-side fold portion 86a, and the upper wall 90 is fixed to the outer frame 65 from above with screws 94, and the lower wall 93 is fixed to the inner frame 66 from below with screws 95.

[0032] As shown in Fig. 9, the ventilation device 64 has an outdoor opening 96 that opens toward the intermediate layer 20 and is formed over the entire longitudinal length between the outdoor-side folded portion 85a of the outer peripheral frame 65 and the outdoor-side folded portion 85b of the inner peripheral frame 66, and an indoor opening 97 that opens toward the room and is formed over the entire longitudinal length between the indoor-side folded portion 86a of the outer peripheral frame 65 and the indoor-side folded portion 86b of the inner peripheral frame 66. An air passage 67 that communicates between the indoors and outdoors is formed between the outer peripheral frame 65 and the inner peripheral frame 66. This allows the ventilation device 64 to circulate air indoors and outdoors from almost the entire longitudinal length. The indoor-side folded portion 86a of the outer frame 65 and the indoor-side folded portion 86b of the inner frame 66 are positioned offset from each other in the viewing direction, with their tips nearly overlapping. This prevents light and line of sight from passing through the ventilation device 64.

[0033] As shown in Fig. 9, in this ventilation device 64, a heat-foaming material 80a that foams and expands due to the heat of a fire is provided along the entire longitudinal length of the upper surface adjacent to the indoor side of the outdoor-side folded portion 85b of the inner circumferential frame 66. In the event of a fire, this heat-foaming material 80a foams and expands to block the outdoor opening 96, as shown in Fig. 10. As shown in Fig. 9, in this ventilation device 64, a heated foam material 80b is provided along the entire longitudinal length on the outdoor surface of the indoor-side folded portion 86b of the inner circumferential frame 66. In the event of a fire, as shown in Fig. 10, this heated foam material 80b foams and expands to block the indoor-side opening 97. In this way, the outdoor-side opening 96 and the indoor-side opening 97 are blocked by the heated foam materials 80a, 80b, thereby preventing the communication of flames and smoke from the ventilation path 67 and preventing the spread of fire. The ventilation device 64 of the second embodiment has no wall (connecting wall) between the outer frame 65 and the inner frame 66, so there is no need to drill holes in the wall for ventilation, and ventilation can be achieved from almost the entire length in the longitudinal direction, thereby reducing ventilation resistance and providing excellent ventilation performance.

[0034] As described above, the present ventilation device (first embodiment) 64 includes an outer peripheral frame 65 and an inner peripheral frame 66, and an air passage 67 connecting the interior and exterior of the room is formed between the outer peripheral frame 65 and the inner peripheral frame 66. This allows for 24-hour ventilation through the air passage 67, contributing to a reduction in electricity costs for air conditioning equipment. Furthermore, the present ventilation device 64 is provided with a heated foam material 80a along its entire length at a position closer to the exterior of the room on the outer peripheral frame 65 or the inner peripheral frame 66 for blocking the exterior openings 76, 78 of the air passage 67 in the event of a fire, and a heated foam material 80b along its entire length at a position closer to the interior of the room on the outer peripheral frame 65 or the inner peripheral frame 66 for blocking the interior opening 79 of the air passage 67 in the event of a fire, thereby providing fire resistance. This ventilation device (second embodiment) 64 includes an outer frame 65, an inner frame 66, and connecting members 84. The connecting members 84 are spaced apart in the longitudinal direction and connect the outer frame 65 and the inner frame 66. A ventilation path 67 is formed between the outer frame 65 and the inner frame 66, communicating the interior and exterior of the room. This allows for 24-hour ventilation through the ventilation path 67, contributing to reduced electricity costs for air conditioning equipment. Furthermore, this ventilation device 64 is provided with heated foam members 80a along the entire length of the outer frame 65 or the inner frame 66, located near the exterior side of the room, for blocking an exterior opening 96 of the ventilation path 67 in the event of a fire. Furthermore, this ventilation device 64 is provided with heated foam members 80b along the entire length of the outer frame 65 or the inner frame 66, located near the interior side of the room, for blocking an interior opening 97 of the ventilation path 67 in the event of a fire, thereby providing fire resistance. Furthermore, in this ventilation device (first and second embodiments) 64, the outer peripheral frame 65 is screwed to the main body 58, and an iron plate 82 is provided in the longitudinal direction to press the outer peripheral frame 65 against the main body 58 via screws 81a and 81b, so that in the event of a fire, the outer peripheral frame 65 can be prevented from deforming in a wavy manner and creating a gap between it and the main body 58. Furthermore, in this ventilation device (first and second embodiments) 64, the outer peripheral frame 65 is screwed to the main body 58, and heated foam materials 83a, 83b are provided along the entire length of the outer peripheral side at a position closer to the outside of the room and / or a position closer to the inside of the room. Therefore, even if the outer peripheral frame 65 is deformed by the heat of a fire and a gap is created between it and the main body 58, the gap can be sealed with the heated foam materials 83a, 83b to prevent the passage of flames and smoke.

[0035] In addition to being provided with an inner window 14 using resin frames 59, 60, 61 and frame and double-glazed glass 63, this double-glazed window allows air to flow between indoors and outdoors through the ventilation path 2 provided in the ventilation frame 1 of the outer window 13, the intermediate layer 20, and the ventilation path 67 provided at the top of the inner window 14.As this happens, the air flows around the intermediate layer 20, following the inner surface of the outer window 13 and the outer surface of the inner window 14, preventing heat transfer in the opposite direction to the air inflow, providing excellent insulation performance and contributing to further reductions in the electricity bill for air conditioning equipment.

[0036] In winter, negative pressure is maintained inside the room using a ventilation fan or other device, allowing air to flow from the outside to the inside of the double-glazed window, as shown in Figure 2. The cold air (outside air) flowing in through the vent frame 1 of the outer window 13 flows downward along the interior side of the glass 74 of the outer window 13, due to the downward-facing vent 6f on the interior side and the flow regulator 56 hanging down from the interior side. The cold air then flows under the interlayer 20 due to the cold draft, turns around, and is warmed by the heat from the interior of the room transferred through the glass 63 of the inner window 14. It then rises along the exterior side of the glass 63, collecting the heat escaping from the glass 63. The warmed air then flows into the room through the ventilation path 67 above the inner window 14. The straightening plate 70 is attached to the outer frame 65 and hangs down, preventing the air rising along the exterior side of the glass 63 from flowing back outside and directing it to the ventilation path 67. As the air passes through the ventilation path 67, the heat from the ventilation device 64 and upper frame 59, which has been warmed by the heat inside the room, is also collected by the air flow. By taking the warmed air into the room, the collected heat can be returned to the room. In this way, the air flows detouring along the outer window 13 and inner window 14 within the intermediate layer 20, and the heat transferred from inside to outside is collected by the air flow and returned to the room, so that there is almost no heat loss from inside to outside, resulting in very high thermal insulation. In addition, because the outside air is heated and brought into the room, people inside do not feel cold drafts and the heating efficiency is also good.

[0037] In summer, a positive pressure is maintained indoors using a ventilation fan or other device, allowing air to flow from the inside to the outside, the opposite of what happens in winter. Air leaving the ventilation path 67 of the inner window 14 hits the air straightening plate 70 and changes direction. Because the temperature of the air inside is lower than the outside, the air flows downward along the exterior side of the glass 63 of the inner window 14. It then turns around at the bottom of the interlayer 20 and, due to heat transfer from the glass 74 of the outer window 13 and other elements, rises along the interior side of the glass 74 of the outer window 13. During this time, the air flow collects heat entering the room from the outside and solar heat through the glass 74. The air then passes through the ventilation frame 1 of the outer window 13 and is released to the outside. As the air passes through the ventilation frame 1, it collects the heat that entered the room via the ventilation frame 1. The air is then released to the outside, discharging the heat and solar heat collected from the glass 74 and ventilation frame 1 to the outside. In this way, the heat from sunlight and the heat transferred from the outside to the inside of the room is collected by the air flow and discarded to the outside, which prevents heat from being transported from the outside to the inside of the room, which is the opposite direction to the air outflow, thereby providing excellent insulation and keeping the room cool.

[0038] As described above, this double-glazed window has the ventilation frame 1 on the outer periphery of the outer window 13 and the ventilation device 64 on the outer periphery of the inner window 14, and air flows between the interior and exterior of the building through the ventilation path 2 of the ventilation frame 1 of the outer window 13, the intermediate layer 20, and the ventilation path 67 of the ventilation device 64 of the inner window 14, allowing for 24-hour ventilation and contributing to reduced electricity costs. In particular, when air flows between the interior and exterior of the building, this double-glazed window allows the air to bypass the intermediate layer 20 and flow along the inner surface of the outer window 13 and the outer surface of the inner window 14, thereby recovering heat escaping from the interior to the exterior in winter and discarding heat entering from the exterior to the exterior in summer, thereby reducing the amount of heat entering and leaving through the windows while ventilating and reducing heating and cooling loads. By adopting the ventilation device 64 of the first and second embodiments, the openings 76, 78, 79, 96, 97 on the outdoor and indoor sides of the ventilation path 67 are blocked by the heated foam materials 80a, 80b in the event of a fire, thereby demonstrating fire prevention performance.

[0039] The present invention is not limited to the above-described embodiments. The ventilation device of the present invention can be used with single-pane windows, not just double-pane windows. The window type is not limited to sliding windows, but can be any window type, including fixed windows and sliding-projection windows. The ventilation device of the present invention can also be installed on the outer periphery of a vertical frame. The shapes and materials of the outer periphery frame, inner periphery frame, and connecting members can be modified as appropriate. The shapes of the exterior and interior openings are arbitrary, and are not limited to slits or rectangular slots, but may also be circular, for example. The heated foaming material may be attached to the outer periphery frame. The present invention can be applied not only to the installation of new exterior and interior windows in a newly constructed building, but also to the addition of an interior window to an existing window with a single sash (exterior window) to create a double-pane window. Using the existing exterior window reduces costs. [Explanation of symbols]

[0040] 13 Exterior window 14 Interior window 64 Ventilation Equipment 65 Outer frame 66 Inner frame 67 Ventilation path 76,78,96 Outdoor opening 77, 79, 97 Indoor opening 80a, 80b Heat-foaming material

Claims

1. a ventilation system comprising an outer peripheral frame and an inner peripheral frame, a ventilation path connecting the interior and exterior of the room between the outer peripheral frame and the inner peripheral frame, a protrusion protruding from the inner peripheral frame toward the outer peripheral frame at a position closer to the exterior of the room, a heated foam material being provided along the entire length on the interior side of the protrusion to close the exterior opening of the ventilation path in the event of a fire, and a protrusion protruding from the inner peripheral frame toward the outer peripheral frame at a position closer to the interior of the room, and a heated foam material being provided along the entire length on the exterior side of the protrusion to close the interior opening of the ventilation path in the event of a fire.

2. a ventilation system comprising an outer peripheral frame, an inner peripheral frame, and connecting members, the connecting members being spaced apart in the longitudinal direction and connecting the outer peripheral frame and the inner peripheral frame; a ventilation path connecting the indoors and outdoors between the outer peripheral frame and the inner peripheral frame; a protrusion protruding toward the outer peripheral frame at a position closer to the outdoor side of the inner peripheral frame; a heated foam material being provided along the entire length on the indoor side of the protrusion for blocking the outdoor opening of the ventilation path in the event of a fire; a protrusion protruding toward the outer peripheral frame at a position closer to the indoor side of the inner peripheral frame; and a heated foam material being provided along the entire length on the outdoor side of the protrusion for blocking the indoor opening of the ventilation path in the event of a fire.

3. An inner window comprising the ventilation device according to claim 1 or 2 on the outer periphery of the window.

4. A double-glazed window comprising an outer window and an inner window, and the ventilation device according to claim 1 or 2 being provided on the outer periphery of the inner window.

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