JP2001090288A - Ventilating device for roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy conservation type ventilating device for a roof capable of exhausting air by utilizing a wind on the outdoor side. SOLUTION: A pair of lower frames 10 are installed to a ridge section 2, and an upper frame 20 (a cover) is arranged to the upper sections of the lower frames 10. An exhaust passage 15 communicated with an indoor space is formed between a pair of vertical walls 12 of the lower frames 10. An auxiliary space 25 communicating the exhaust passage 15 with the outdoor side is formed to the lower section of the upper frame 20. A pair of cloth 31 (movable members) deviated by atmospheric-pressure difference are arranged, holding the upper-end opening of the exhaust passage 15 in the auxiliary passage 25. When a wind passes to a rood, cloth 31 positioned on the upstream side of the wind is deviated so as to inhibit a flowing in the upstream-side passage section 25b of the auxiliary passage 25, cloth 31 positioned on the downstream side is deviated so as to increase the flowing sectional area of the downstream-side passage section 25c of the auxiliary passage 25, and exhaust to the outdoor side from the exhaust passage 15 through the downstream-side passage section 25c is promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device mounted on a building roof.

[0002]

2. Description of the Related Art A technique for providing a ventilation device on a roof has been developed in order to release indoor hot air and contaminated air. This ventilation device has an exhaust passage formed on a roof, and the upper part of the exhaust passage is covered with a cover. An auxiliary passage is formed below the cover, and the exhaust passage communicates with the outside via the auxiliary passage.

[0003]

In the above ventilating apparatus, indoor air rises and is discharged by natural convection, and it is required to promote the discharge. In order to meet this demand, a fan is used to discharge air, but this increases power consumption.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has as its main object to provide an energy-saving roof capable of promoting exhaust air by utilizing outdoor wind. To provide a ventilation device for air conditioning.

A first aspect of the present invention is directed to an exhaust passage for raising and discharging indoor air, a cover disposed above an upper end opening of the exhaust passage, and the exhaust passage formed below the cover. In the ventilation device for a roof provided with an auxiliary passage connecting the outside to the outside, at least a pair of movable members that are deviated by a pressure difference are arranged in the auxiliary passage with the upper end opening of the exhaust passage interposed therebetween, and When passing
The movable member located on the upstream side of the wind is shifted so as to suppress the flow in the upstream passage portion of the auxiliary passage, whereby the outdoor member passes through the downstream passage portion of the auxiliary passage from the exhaust passage. It is characterized by promoting the exhaust toward.

According to a second aspect of the present invention, in the roof ventilation system according to the first aspect, when the wind passes through the roof, a movable member positioned downstream of the wind includes a downstream passage portion of the auxiliary passage. Characterized in that the cross section is shifted so as to increase the flow cross-sectional area. A third aspect of the present invention is the roof ventilator according to the first or second aspect, wherein the movable member is formed of a flexible sheet. A fourth aspect of the present invention is the roof ventilation apparatus of the third aspect, wherein the sheet is made of a synthetic fiber cloth. According to a fifth aspect of the present invention, in the roof ventilation device according to the third or fourth aspect, the movable member has a hanging state with an upper edge supported and a lower edge provided with a weight, and It is characterized in that it shifts around the upper edge due to the difference.

According to a sixth aspect of the present invention, the first to fifth roof ventilation systems are mounted on a ridge. The ridge formed by the intersection of a pair of inclined roofs is provided with the exhaust gas. A passage is provided, and the movable member is disposed so as to face in a direction orthogonal to the ridge. A seventh aspect of the present invention is the roof ventilation device according to the sixth aspect, wherein a gap is formed between the pair of roof portions, and the roof portions face each other with the gap therebetween and along the ridge portion. A pair of extending upright walls is provided, and the space between the upright walls and the gap constitutes the exhaust passage.

According to an eighth aspect of the present invention, in the roof ventilating apparatus according to the seventh aspect, the upper edge of the movable member is supported by the cover and hangs away from the upright wall.
When the movable member is located on the upstream side of the wind, the movable member shifts toward the upright wall, thereby suppressing the flow in the upstream passage portion of the auxiliary passage. According to a ninth aspect of the present invention, in the roof ventilation device of the seventh aspect, one edge of a movable member is supported by the upright wall, and the movable member rests on its own weight on the bottom surface of the auxiliary passage. In addition, when it is located on the upstream side of the wind, it is characterized by being shifted upward toward the cover, thereby suppressing the circulation in the upstream passage portion of the auxiliary passage.

A tenth aspect of the present invention is an application of the first to fifth aspects to a chimney-shaped roof ventilator, wherein the inner cylinder projects vertically upward from the roof, and surrounds the inner cylinder. An outer cylinder, an upper end of the outer cylinder is covered by a cover, an inner space of the inner cylinder serves as the exhaust passage, an upper space of the outer cylinder serves as the auxiliary passage, and an upper peripheral wall of the outer cylinder. Has at least one ventilation port facing the horizontal axis direction, the movable member is disposed between the inner cylinder and the ventilation port, and these movable members face the horizontal axis direction with the inner cylinder interposed therebetween. It is characterized by doing. First of the present invention
According to a first aspect, in the ventilation device according to the tenth aspect, another ventilation port facing another horizontal axis direction orthogonal to the horizontal axis is formed in an upper peripheral wall of the outer cylinder, and the other ventilation port is formed. Another movable member is disposed between the inner tube and the inner tube, and the other movable member faces the other horizontal axis with the inner tube interposed therebetween. A twelfth aspect of the present invention is directed to the first aspect.
In the roof ventilating apparatus according to the 0th and eleventh aspects, a shaft is hung horizontally on the upper peripheral wall of the outer cylinder, and the upper edge of the movable member is supported by the shaft and hangs down. When the member is located on the upstream side of the wind, the member is shifted toward the inner cylinder.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A roof ventilation system according to the present invention will be described below with reference to the drawings. First, a first embodiment of a ventilation device mounted on a ridge of a roof will be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIG. 1, a ridge 2 is formed by the intersection of a pair of inclined roofs 1.
The roof portion 1 has a roof plate 1a and a back plate 1b arranged in parallel below the roof plate 1a, and an internal space 1c of the roof portion 1 is formed therebetween. The roof plate 1a and the back plate 1b are connected by a purlin 1d in the ridge portion 2.

The pair of roof portions 1 are separated from each other at the ridge portion 2, and a gap 3 extends along the ridge portion 2. An attic space 4 between the roof portion 1 and a ceiling (not shown) is connected to an internal space 1c of the roof portion 1 through an opening (not shown) formed in the back plate 1a.
Is connected to the gap 3 of the ridge part 2 through an opening (not shown) formed in the purlin 1d. In the present embodiment, the internal space 1c of the roof 1 and the attic space 4 are indoor spaces that require exhaust. In addition, roof part 1
Indoor space 1c alone may constitute an indoor space.

The ventilator includes a pair of lower frames 10 made of an extruded aluminum material and an upper frame 20 (cover) also made of an extruded aluminum material. The lower frame 10 and the upper frame 20 extend along the ridge 2, and both ends thereof are closed by side plates (not shown). Each lower frame 10 includes a mounting portion 11 fixed to the upper surface of the roof plate 1a,
Erected wall 12 vertically erected from the edge on the side of the ridge portion 2, an inclined wall 13 extending from an upper edge of the erected wall 12 in parallel with the mounting portion 11, and extending vertically downward from a leading edge of the inclined wall 13. And a hanging wall 14. An exhaust passage 15 is formed by the space between the upright walls 12 of the pair of lower frames 10 and the gap 3 between the roof 1.

The upper frame 20 is disposed above the pair of lower frames 10 and has a pair of inclined walls 11 parallel to the inclined walls 13 of the lower frame 10 and has a mountain shape. . Further, the upper frame 20 has a hanging wall 12 that extends vertically downward from the leading edge of the inclined wall 11. An auxiliary passage 25 is formed below the upper frame 20. This auxiliary passage 2
5 is a central passage portion 25a located above the upper end opening of the exhaust passage 15, and a pair of left and right passage portions 25b, 2
5c. Left and right passage portions 25b, 25c
Includes a space between the inclined wall 13 of the lower frame 10 and the inclined wall 21 of the upper frame 20 and a space between the hanging wall 14 of the lower frame 10 and the hanging wall 22 of the upper frame 20. The exhaust passage 15 communicates with the outside via the auxiliary passage 25.

In the left and right passage portions 25b and 25c,
A valve means 30 is arranged. Therefore, the pair of valve means 30 face each other across the upper end opening of the exhaust passage 15 in a direction orthogonal to the extending direction of the ridge portion 20. The valve means 30 has a nylon (synthetic fiber) cloth 31 (a flexible thin sheet having water repellency) as a movable member. The cloth 31 has an elongated rectangular shape along the ridge portion 2.

Next, a support structure for the cloth 31 will be described with reference to FIG. The inclined wall 2 of the upper frame 20
A tapping hole 21a (mounting groove) is formed on the lower surface of 1. The tapping hole 21a has a cloth 31 together with a hollow push rod 32 made of an elastic material such as rubber.
The upper edge (one edge) is pushed in. That is, the upper edge of the cloth 31 is attached between the push rod 32 and the inner surface of the tapping hole 21a. in this way,
The cloth 31 hangs down with its upper edge supported by the inclined wall 21 of the upper frame 20, and is disposed between the hanging wall 14 of the lower frame 10 and the hanging wall 22 of the upper frame 20.

As best shown in FIG. 2A, the lower edge of the cloth 31 is folded and sewn to form the bag 31.
a. The bag portion 31a contains a rod-shaped weight 33 made of an elastic material such as rubber.

Next, the operation of the ventilation device having the above configuration will be described. When the outside is in a windless state (the pressure difference between the indoor and outdoor areas is zero) or in a breeze state, the left and right cloths 31 maintain the hanging state, and the passage portions 25b, 25 of the auxiliary passage 25 are maintained.
Do not block c. In this state, indoor hot air or dirty air rises in the exhaust passage 15 by natural convection, and the auxiliary passage 2
5 through a central passage portion 25a, from which the air is discharged to the outside through passage portions 25b and 25c.
At this time, since the weight 33 is attached to the lower end edge of the cloth 31, the above-described exhaust state can be surely maintained without being greatly shaken by the breeze.

The operation when a relatively strong wind blows outdoors will be described. As an example, a case where the wind blows from left to right as indicated by an arrow in FIG. 1, that is, a case where the left side is the upstream side and the right side is the downstream side will be described. In this case, the cloth 31 on the left side winds (in other words, due to the pressure difference between both sides of the cloth 31), and flutters rightward with its upper edge as the center, and the lower part of the cloth 31 , Thereby blocking the left passage portion 25b. As a result, it is possible to prevent the wind from blowing into the room through the exhaust passage 15, and to prevent dust and rainwater from entering the room together with the wind. The cloth 31 allows some air to pass through. Further, since the weight 33 is attached to the lower edge of the cloth 31, the lower edge of the cloth 31 does not turn up due to the gust, and the lower part of the cloth 31 is securely in contact with the hanging wall 14 so that the passage portion 25 is formed.
b can be closed.

As described above, when the wind blows from left to right,
This wind is prevented from being blown into the exhaust passage 15 by the cloth 31 on the left side, and flows to the right through the upper frame 20. As a result, the right passage portion 25c and this passage portion 25c
(Outdoors) is negative pressure. Therefore, the indoor air is promoted to be discharged from the exhaust passage 15 through the right passage portion 25c. As described above, the exhaust can be promoted by using the outdoor wind without driving the fan.

As described above, air is exhausted through the right passage portion 25c. At this time, the right cloth 31 is exhausted by the exhaust air (in other words, due to the pressure difference between both sides of the cloth 31). Since it flows to the right with the upper edge as the center, thereby increasing the flow cross-sectional area of the passage portion 25c, the exhaust can be further promoted.

Since the cloth 31 is soft and light unlike the board, no impact noise is generated even when the cloth 31 contacts the hanging wall 14. Although the weight 33 may hit the hanging wall 14,
Due to being housed in the bag portion 31a of the cloth 31, being made of an elastic material such as rubber, being lightweight, and the like, it does not generate any impact noise.

Conversely, when the wind is blowing from right to left, the cloth 31 on the right (upstream side) flows to the left and the hanging wall 1
4, the right passage portion 25c is closed, and the left (downstream) cloth 31 extends to the left, and the left passage portion 2c.
5b to increase the flow cross-sectional area and promote exhaust.

When the outdoor wind stops, the cloth 31 returns to the original hanging position by its own weight, and the left and right passage portions 25b and 25
The exhaust by natural convection can be resumed via c. At this time, the weight 33 can surely return to the original hanging position due to its own weight. Further, by adjusting the weight of the weight 33, it is possible to determine how strong the wind will block the passage portions 25b and 25c.

Instead of the cloth 31 of the above embodiment, FIG.
As shown in (B), a plate 34 (movable member) may be used. The plate 34 is made of, for example, an aluminum material. Board 34
A shaft 34a is formed on the upper edge of the shaft 3a.
4 a is inserted and supported in the tapping hole 21 a of the inclined wall 21. In this case, the plate 34 hangs down in a rotatable state, and when wind blows, the upstream plate 34 turns to hit the hanging wall 14 of the lower frame 10 and the downstream plate 3
4 rotates away from the hanging wall 14. When it is desired to suppress the impact sound caused by the collision of the plate 34, a cushioning material such as rubber may be attached to the plate 34 or the hanging wall 14, or the plate 3
4 itself may be formed of an elastic material such as rubber.

In the above embodiment, a regulating member may be arranged on the outdoor side of the cloth 31 or the plate 34. In this case, the cloth 31
When the baffle plate 34 is located on the downstream side of the wind, it is suppressed by this regulating member from shifting away from the hanging wall 14, and the hanging state is maintained. In this case,
The flow cross-sectional area of the downstream passage portion in the auxiliary passage 25 does not change.

FIG. 3 shows a roof ventilation device according to a second embodiment of the present invention. This ventilator is mounted on the ridge in the same manner as in the first embodiment described above. Corresponding components in the drawing are denoted by the same reference numerals, and detailed description thereof will be omitted. In this embodiment, the lower frame 10 has a mounting portion 11 and an upright wall 12, but the inclined wall 13 and the hanging wall 14 of the first embodiment are omitted. In the middle of the attachment part 11, the ridge part 2
A step 11a extending in parallel with is formed. Auxiliary passage 2
The left and right passage portions 25b and 25c are formed by a substantially parallelogram-shaped space surrounded by the mounting portion 11 of the lower frame 10, the upright wall 12, and the inclined wall 21 and the hanging wall 22 of the upper frame 20. ing.

A tapping hole 12a is formed at the upper edge of the upright wall 12.
The upper edge of the cloth 31 is attached to 2a via a push rod 32 as in the first embodiment. The cloth 31 hangs down along the standing wall 12 due to its own weight, and
1 (the bottom surface of the auxiliary passage 25). Cloth 31
Of the cloth 31 protrudes outward from the step 11a of the mounting portion 11, whereby the front edge of the cloth 31 and the mounting portion 11
A blow-in space 35 is formed between them.

On the lower surface of the inclined wall 21 of the upper frame 20,
An L-shaped fitting 36 (a regulating member) is attached.
A plurality of the metal fittings 36 are arranged in parallel with the ridge portion 2 at intervals so as to allow air to flow. This bracket 36
Is fixed to the inclined wall 21, and the other piece projects toward the upper edge of the upright wall 12.

In the ventilator having the above-mentioned structure, when the outside is in a windless or light wind state, the left and right cloths 31
As shown by the solid line, the state of hanging on the upper surface of the mounting portion 11 is maintained, and the passage portion 25 of the auxiliary passage 25 is maintained.
b, 25c are not blocked. In this state, indoor hot air or dirty air rises due to natural convection and rises in the exhaust passage 15, passes through the central passage portion 25 a of the auxiliary passage 25, and is divided into left and right passage portions 25 b and 25 c. It is discharged outside the street. Since the cloth 31 is placed on the upper surface of the mounting portion 11, the flow resistance of the passage portions 25b and 25c does not increase due to the cloth 21.

As shown by an arrow in FIG. 3, when the wind blows from left to right outdoors, the cloth 31 on the left side is blown up by the wind and contacts the inclined wall 21 of the upper frame 20, whereby the left side cloth 31 Is blocked. as a result,
The wind is prevented from blowing into the room through the exhaust passage 15. At this time, a blowing space 35 is formed below the leading edge of the cloth 31, and air is blown into the blowing space 35.
1 can be blown up.

As described above, when the left cloth 31 blocks the passage portion 25b when the wind blows from left to right, the right passage portion 25c and the vicinity of the passage portion 25c become negative pressure. This promotes the discharge of indoor air from the exhaust passage 15 to the outside through the right passage portion 25c.

As described above, when air is exhausted through the right passage portion 25c, the right cloth 31 is attached to the mounting portion 1c.
1 is maintained on the upper surface of the passage portion 25c.
Is maintained as it is. In addition, the right cloth 31 may be lifted from the upper surface of the mounting portion 11 by the exhaust air and reduce the flow cross-sectional area of the passage portion 25c. However, even in this case, the cloth 31 Is not a big resistance.

Contrary to the above, when the wind is blowing from right to left, the cloth 31 on the right side (upstream side) blows up and the inclined wall 2
1, the right passage portion 25c is closed, and the left vent hole 26 is set to a negative pressure to promote exhaust. Also in this embodiment, no impulsive sound is generated due to the displacement of the cloth 31. Also, when the upstream cloth 31 is blown up,
The metal member 36 can prevent the cloth 31 from entering the exhaust passage 15. When the outdoor wind stops, the cloth 31 returns to its original state by its own weight, and the left and right passage portions 25b and 25c.
, The exhaust by natural convection can be resumed. In the above embodiment, a plate may be used instead of the cloth 31.

Next, as a third embodiment of the present invention, a chimney-shaped roof ventilating device will be sequentially described with reference to FIGS. A base cylinder 50 having a rectangular cross section and having a vertical axis is attached to the roof plate 1a of the roof portion 1. The lower surface of the base cylinder 50 is inclined corresponding to the inclination of the roof part 1, and the upper surface thereof is horizontal.

A connecting tube 51 penetrates the roof 1 at a portion surrounded by the base tube 50. A duct 52 extending to the ceiling of the room is connected to the connecting cylinder 51. The internal space of the room (indoor space) is connected to the internal space of the base tube 50 via the duct 52 and the connecting tube 51.

A horizontal rectangular cover plate 53 is fixed to the upper surface of the base cylinder 50. A circular hole 53a is formed in the center of the lid plate 53. An inner cylinder 60 and an outer cylinder 70 surrounding the inner cylinder 60 are coaxially fixed to the upper surface of the lid plate 53. The inner cylinder 60 has a lower portion 61 having a circular cross section and an upper portion 62 having a rectangular cross section.
Has the same diameter as the hole 53a of the cover plate 53. The internal space of the inner cylinder 60 is provided as an exhaust passage 65.

The outer cylinder 70 has a lower portion 71 having a rectangular cross section.
And an upper portion 72 having the same cross-sectional shape as the lower portion 71. The upper space of the outer cylinder 70 is provided as an auxiliary space 75. The lower portion 71 of the outer cylinder 70 is made of four flat plates, and the upper portion 72 is made of four gull-shaped aluminum members 73. At the four corners of the outer cylinder 70, columns 76 are arranged,
The plate of the lower part 71 and the profile 73 of the upper part 72 are supported. The lower end of the outer cylinder 70 is separated from the cover plate 53, and this gap serves as a drain hole 77. The upper end opening of the outer cylinder 70 is closed by a cover 80. This cover 80 is separated from the upper end of the inner cylinder 60.

The four mold members 73 of the outer cylinder 70 are horizontal X
It consists of a pair facing each other across the inner cylinder 60 in the axial direction and a pair facing the horizontal Y-axis direction perpendicular to the inner cylinder 60. The roof 1 is inclined along the X axis. Each mold 70
Has a flat plate portion 73a and a plurality of blades 73b protruding outward from the flat plate portion 73a. These blades 73b are horizontal and are formed at equal intervals up and down. A large number of ventilation holes 73x are formed in the flat plate portion 73a.

A valve means 90 is arranged between the inner cylinder 60 and each mold 73. That is, a pair of valve means 90 facing in the X-axis direction with the inner cylinder 60 interposed therebetween is arranged, and similarly, a pair of valve means 90 facing in the Y-axis direction with the inner cylinder 60 interposed therebetween. Each valve means 90 has a rectangular cloth 91 (movable member) made of the same material as that of the first embodiment, and this cloth 91 is attached to a horizontal shaft 92 laid over the upper portion 72 of the outer cylinder 70. Supported. The shafts 92 of the pair of valve means 90 facing each other in the X-axis direction extend in the Y-axis direction, and both ends thereof are screwed with screws 93 to form the flat portion 7
3a. Similarly, shafts 92 of a pair of valve means 90 facing each other in the Y-axis direction extend in the X-axis direction, and both ends thereof are fixed to the flat plate portion 73 a of the mold 73 by screws 93. The height of the pair of shafts 92 facing in the X-axis direction is different from the height of the pair of shafts 92 facing in the Y-axis direction, eliminating mutual interference.

The upper edge of the cloth 91 is attached to these shafts 92 and hangs down. As shown in FIG. 6, the upper edge of the cloth 91 is a bag 91a, and the shaft 92 is inserted into the bag 91a. The lower edge of the cloth 91 is also a bag portion 91b, into which a weight 94 made of a rod-shaped elastic material is inserted. Cloth 9
1 corresponds to the corresponding shape member 73 in the hanging state.
And the corresponding flat wall of the upper portion 62 of the inner cylinder 60.

The auxiliary passage 75 includes a central passage portion 75 a located above the inner cylinder 60, the inner cylinder 60 and the outer cylinder 7.
And a peripheral passage portion located between the upper passage 71 and the upper portion 71 of the slab. This peripheral passage portion includes four passage portions 75b to 75e located between the four mold members 73 and the inner cylinder 60. The passage portions 75b and 75c face each other in the X-axis direction. The passage portions 75d and 75e face each other in the Y-axis direction. The valve means 90 is disposed in each of the passage portions 75b to 75e.

In the above configuration, when there is no wind (the pressure difference between the indoor and the outdoor is zero) or the light wind is present outside, the cloth 91 located in four directions as viewed from the inner cylinder 60 maintains the hanging state. Passage portions 75b to 75e of auxiliary passage 75
Do not block. In this state, the hot air and dirty air inside the room rise due to natural convection and rise in the duct 52 and the connecting cylinder 5.
1. The gas passes through the base cylinder 50, further rises in the exhaust passage 65, passes through the central passage portion 75a of the auxiliary passage 75, and is discharged outside through all the surrounding passage portions 75b to 75e. At this time, since the weight 94 is attached to the lower end edge of the cloth 91, the exhaust state can be surely maintained without being greatly shaken by the breeze.

The operation when a relatively strong wind blows outdoors will be described. As an example, a case where the wind blows from left to right along the X axis as indicated by an arrow in FIG. 4, that is, a case where the left side is the upstream side and the right side is the downstream side in FIG. 4 will be described. In this case, the cloth 91 on the left side flutters rightward about the upper edge thereof due to the wind (in other words, due to the pressure difference between both sides of the cloth 91), and the lower part thereof becomes a flat wall of the upper part 62 of the inner cylinder 60. And thereby substantially shut off the left passage portion 75b. As a result, strong wind is prevented from being blown into the room through the exhaust passage 75. Further, since the weight 94 is attached to the lower edge of the cloth 91, the lower edge of the cloth 91 is not turned up by the wind, so that the passage portion 75b can be reliably brought into contact with the inner cylinder 60 and closed. .

As described above, when the wind blows from left to right,
This wind is prevented from being blown into the exhaust passage 65 by the cloth 91 on the left side, and flows to the right through the upper frame 20. As a result, a negative pressure is generated in the vicinity of the right vent 73x. Therefore, the discharge of the indoor air from the exhaust passage 65 through the right passage portion 75c is promoted.

As described above, the air is exhausted through the right passage portion 25c. At this time, the right cloth 91 is exhausted by the exhaust air (in other words, due to the pressure difference between both sides of the cloth 91). Since it flows to the right with the upper edge as the center, thereby increasing the flow cross-sectional area of the passage portion 75c, exhaust can be further promoted.

Since the cloth 91 is soft and light unlike the plate, no impact noise is generated even when the cloth 91 contacts the inner cylinder 60. The weight 94 hits the hanging wall 60, but does not generate an impact sound because it is accommodated in the bag portion 91b of the cloth 91, is made of an elastic material such as rubber, and is lightweight.

Contrary to the above, when the wind is blowing from right to left, the cloth 91 on the right (upstream side) flows to the left and the inner cylinder 60
, The right passage portion 75c is closed, and the cloth 91 on the left (downstream side) extends to the left, and the left passage portion 75c is closed.
b to increase the flow cross-sectional area and promote exhaust.

When the wind is blowing from the Y-axis direction, the pair of cloths 91 facing each other in the Y-axis direction is shifted in the same manner as described above to promote exhaust. When the outdoor wind stops, the cloth 91 returns to the original hanging position by its own weight, and the exhaust by natural convection can be restarted through the passage portions 75b to 75e.
At this time, the weight 94 can reliably return to the original hanging position due to its own weight.

FIG. 7 shows a ventilation device according to a fourth embodiment having a chimney shape similar to the third embodiment. In FIG. 7, the third
The same reference numerals are given to the components corresponding to the embodiment, and the detailed description is omitted. In this embodiment, the auxiliary passage 75
Valve means 90 disposed in each of the passage portions 75b to 75e.
Has a plurality of cloths 91, respectively. Each valve means 90
Are arranged apart in the X-axis direction or the Y-axis direction, are lower near the inner cylinder 60, and are higher as the distance from the inner cylinder 60 increases.

In the above configuration, a plurality of cloths 91 having a shorter width in the vertical direction than those of the third embodiment are arranged in the passage portions 75b to 75e.
e, the flow resistance is small, and exhaust by natural convection can be favorably performed.

When the wind blows, the cloths 91 on the upstream side flow and overlap each other, and the cloths 91 on the downstream side flow in the same direction by the exhaust air, and are kept separated from each other.
It will promote distribution. At this time, the shaft 92 that supports the cloth 91 on the upstream side also plays a role of preventing the cloth 91 from being turned up.

In the chimney-shaped ventilation device according to the third and fourth embodiments, a plate may be used instead of the cloth 91 as a movable member. In this case, a shaft may be integrally formed on both sides of the upper edge of the plate, and this shaft may be rotatably attached to the upper peripheral wall of the outer cylinder. In the chimney-shaped ventilator, the valve means 90 may be provided in only one pair facing the X-axis direction, and the valve means facing the Y-axis direction may be omitted. Alternatively, a pair of valve means facing the Y-axis direction may be omitted. Only means 90 may be provided. In this case, the cross-sectional shape of the upper part of the inner cylinder 60 may be a rectangle that is elongated in a direction perpendicular to the direction in which the valve means 90 faces each other. Further, the ventilation port 73x and the valve means 90 are
They may be arranged so as to face each other in three horizontal directions that are apart from each other, that is, in six directions when viewed from the inner cylinder 60.

In all of the above-described embodiments, a fan may be provided in the exhaust passage or the indoor passage connected thereto, and the fan may be rotated when the wind speed sensor determines that the wind is weak. In all the embodiments described above,
A valve may be provided in the exhaust passage or an indoor passage connected thereto, and the valve may be closed when it is desired to stop the exhaust from the indoor space. This is effective to increase the heating efficiency during winter heating.

The sheet as the movable member is not limited to a synthetic fiber cloth, but may be a synthetic resin film, a nonwoven fabric, or the like. In the embodiment where the sheet is supported in a hanging state, the weight attached to the lower edge of the sheet may be formed by wire or may be omitted.

[0055]

As described above, according to the first aspect of the present invention, an outdoor wind is utilized by using at least one pair of movable members shifted by an air pressure difference in a roof ventilation system. Exhaust can be promoted and energy can be saved. According to the second aspect of the present invention, while the upstream movable member suppresses the flow of the upstream passage portion of the auxiliary passage, the downstream movable member increases the flow cross-sectional area of the downstream passage portion of the auxiliary passage. As a result, the exhaust can be further promoted. According to the third aspect of the present invention, since it is performed using a flexible sheet, it can be manufactured at low cost and can eliminate noise.
According to the fourth aspect of the present invention, since the sheet is made of synthetic fiber cloth, it is inexpensive and has excellent weather resistance and flexibility.
According to the fifth aspect of the present invention, when returning to the windless state, the sheet can surely return to the hanging state due to the weight.

According to the sixth aspect of the present invention, the present invention can be applied to a ventilation device provided in a ridge. According to the seventh aspect of the present invention, in the ventilation device for the ridge, by providing the pair of upright walls, it is possible to reliably prevent the blowing of the strong wind into the exhaust passage, and to provide the rainwater and dust associated with the strong wind. Can be prevented from entering. According to the eighth aspect of the present invention, in the ventilation device for the ridge portion, the movable member on the upstream side of the wind is shifted from the hanging state toward the vertical wall, so that the upstream passage portion of the auxiliary passage is reliably formed. Distribution can be suppressed, and exhaust can be promoted. According to the ninth aspect of the present invention, in the ridge part ventilation device, the movable member on the upstream side of the wind is shifted upward from the state of riding on the bottom of the exhaust passage toward the cover, so that the upstream of the auxiliary passage is provided. The flow of the side passage portion can be suppressed, and the exhaust can be promoted. According to this aspect, the flow resistance in the auxiliary passage can be reduced when the air is exhausted by natural convection without blowing the wind.

According to the tenth aspect of the present invention, the present invention can be applied to a chimney-shaped ventilation device. According to the eleventh aspect of the present invention, in a chimney-shaped ventilation device, exhaust can be promoted by utilizing winds from two horizontal axes, that is, four directions. According to the twelfth aspect of the present invention, in the chimney-shaped ventilation device, the movable member can be supported with a simple structure by using the shaft as the regulating member.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment in which the present invention is applied to a building ventilation device.

FIG. 2A is an enlarged longitudinal sectional view showing a movable member which is a main part of FIG. (B) is a longitudinal section showing another mode of the movable member.

FIG. 3 is a longitudinal sectional view showing a second embodiment in which the present invention is applied to a building ventilation device.

FIG. 4 is a longitudinal sectional view showing a third embodiment in which the present invention is applied to a chimney-shaped ventilation device.

FIG. 5 is a plan view of the ventilation device according to the third embodiment without a cover.

6 is an enlarged longitudinal sectional view showing a movable member which is a main part of FIG. 5;

FIG. 7 is a longitudinal sectional view showing a fourth embodiment in which the present invention is applied to a chimney-shaped ventilation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof part 1c Inner space of roof part (indoor space) 2 Building part 3 Gap 4 Attic space (indoor space) 13 Standing wall 15 Exhaust passage 20 Upper frame (cover) 25 Auxiliary passage 25a-25c Passage part of auxiliary passage 31 Cloth (Seat, movable member) 33 Weight 34 Plate (movable member) 60 Inner cylinder 65 Exhaust passage 70 Outer cylinder 73x Vent 75 Auxiliary passages 75a to 75e Auxiliary passage portion 80 Cover 91 Cloth (seat, movable member) 94 Weight

Claims (12)

[Claims] 1. An exhaust passage for raising and discharging indoor air, a cover disposed above an upper end opening of the exhaust passage, and an auxiliary passage formed below the cover and connecting the exhaust passage to the outside. In the ventilation device for a roof provided with, at least a pair of movable members which are shifted by an air pressure difference are arranged in the auxiliary passage so as to sandwich an upper end opening of the exhaust passage. The movable member located on the upstream side of the auxiliary passage is shifted so as to suppress the flow in the upstream passage portion of the auxiliary passage, whereby the movable member goes outdoors from the exhaust passage via the downstream passage portion of the auxiliary passage. A roof ventilation system characterized by promoting exhaust. 2. When the wind passes through the roof, a movable member located on the downstream side of the wind shifts so as to increase a flow cross-sectional area of a downstream passage portion of the auxiliary passage. The roof ventilation device according to claim 2. 3. The roof ventilation device according to claim 1, wherein the movable member is made of a flexible sheet. 4. The roof ventilation system according to claim 3, wherein said sheet is made of synthetic fiber cloth. 5. The movable member is supported by an upper edge portion and has a hanging state, a weight is provided at a lower edge portion thereof, and the movable member is shifted around the upper edge portion by the pressure difference. The roof ventilation device according to claim 3. 6. A ridge formed by the intersection of a pair of inclined roofs, wherein the exhaust passage is provided, and the movable member is arranged to face the ridge in a direction orthogonal to the ridge. The roof ventilation device according to any one of claims 1 to 5, characterized in that: 7. A gap is formed between the pair of roof portions,
These roofs are provided with a pair of upright walls that face each other across the gap and extend along the ridge, and the space between the upright walls and the gap constitutes the exhaust passage. The roof ventilation device according to claim 6, wherein 8. The cover has an upper edge portion of a movable member that is supported and hangs away from the upright wall, and the movable member faces the upright wall when it is located on the upstream side of the wind. 8. The flow in the upstream passage portion of the auxiliary passage is suppressed by the displacement.
The ventilation device for roof according to 4. 9. The upright wall supports one edge of a movable member, and the movable member rests on its own weight on the bottom surface of the auxiliary passage, and when it is located on the upstream side of the wind, the movable member has a cover. The roof ventilator according to claim 7, wherein the airflow is shifted upward toward the upper side to suppress the circulation in the upstream passage portion of the auxiliary passage. 10. An inner cylinder projecting vertically upward from the roof, and an outer cylinder surrounding the inner cylinder, an upper end of the outer cylinder is covered by a cover, and the inner space of the inner cylinder is It becomes an exhaust passage, the upper space of the outer cylinder becomes the auxiliary passage, and the upper peripheral wall of the outer cylinder is formed with at least one ventilation port facing in the horizontal axis direction, between the inner cylinder and the ventilation port. The roof ventilation device according to any one of claims 1 to 5, wherein the movable members are arranged, and the movable members face each other in the horizontal axis direction with the inner cylinder interposed therebetween. 11. An upper peripheral wall of the outer cylinder is formed with another ventilation port facing in the other horizontal axis direction orthogonal to the horizontal axis, and another ventilation port is provided between the other ventilation port and the inner cylinder. 2. The movable member according to claim 1, wherein the other movable member faces the other horizontal axis across the inner cylinder.
The ventilation device for a roof according to 0. 12. A shaft is hung horizontally around the upper peripheral wall of the outer cylinder, and the upper edge of the movable member is supported by the shaft and hangs down. The roof ventilator according to claim 10 or 11, wherein when it is positioned, it shifts toward the inner cylinder.