JPH09113021A - Air ventilation structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a maintenance work and an operation procedure for adjusting an air amount by a method wherein an air discharging port is provided with an air amount adjusting device in which an air discharging amount for a duel can be adjusted. SOLUTION: An air ventilation device F having two air suction side connectors 101 and one air blowing side connector 102 is installed in a rear side space CS of a ceiling. The air suction side connector 101 is connected through a duct D1 to each of air discharging ports 202 arranged at each of ceilings 201 of the adjoining two rooms R1, R2, and then an air blowing side connector 103 is communicated with a surrounding air through a duel D2. When the air ventilation device F is operated, air in the duel 1 is discharged out, resulting in that the air suction port 12 of a grid 1 is released and indoor air enters from an aeration port 12 into the air discharging port 202, passes through an air discharging flow passage (a), runs through the aeration hole 21 and flows into the duct D1. At this time, a vertical position of a stopper and 3 abutted against an opening or closing valve 2 is adjusted by a stopper supporting member 4 installed at the grid 1 so as to enable a discharged air amount to be adjusted from an indoor side and further its troublesomse operation cart be eliminated.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a ventilation structure for a building.

[0002]

2. Description of the Related Art In a recent building, a ventilation device is provided in a space above the ceiling, and an intake side connection portion of the ventilation device is connected to an exhaust port provided in each ceiling of a plurality of rooms through a duct. This has led to the adoption of a ventilation structure that can simultaneously ventilate multiple rooms with a single ventilator.

In this way, when a plurality of rooms are ventilated by a single ventilation device, the required ventilation volume differs from room to room, such as the amount of exhaust air required for a toilet is smaller than that for a bathroom or dressing room. It is desirable to be able to adjust the exhaust air volume for each room by varying the length and bending of the duct connecting the device and the exhaust port of each room.

Therefore, conventionally, a ventilation device is disclosed in
The one having the structure as described in JP-A-140546 is used. In this ventilation device, a plurality of intake side connection ports are provided in a case that houses a fan, and an air volume adjustment adapter with a built-in shutter is provided in each of these intake side connection ports. The amount of exhaust air can be adjusted.

[0005]

However, in such a conventional ventilation structure, the exhaust air volume for each room is adjusted by the opening degree of the shutter of the ventilation device provided in the space above the ceiling. Therefore, when the shutter cannot be opened / closed due to adhesion of dust or oil, its maintenance is very difficult. Also,
It is also very difficult to adjust the exhaust air volume according to the change of seasons or the purpose of use of the room.

In view of the above problems, an object of the present invention is to provide a ventilation structure for a building which can save the labor of maintenance of the air volume adjusting means and the work of air volume adjustment.

[0007]

In order to achieve the above object, in the ventilation structure for a building according to claim 1 of the present invention, a ventilation device is provided in the space above the ceiling, and the ventilation device is connected to a plurality of rooms. In the ventilation structure that is connected through a duct with the exhaust port provided in each ceiling of,
An air volume adjusting device that can adjust the exhaust air volume to the duct is provided.

A ventilation structure for a building according to claim 2 is
The exhaust amount adjusting device is attached to the ceiling in a state of covering the exhaust port and has a ventilation port, and is provided in the exhaust port so as to be vertically movable, and does not overlap with the ventilation port of the lattice. It has a ventilation hole at the position, and when the ventilation system is stopped, it abuts on the lattice and closes the exhaust port, and when the ventilation system is activated, the inside of the duct becomes negative pressure so that it floats up from the lattice and rises in the exhaust port. An on-off valve, a stopper member provided in the exhaust port for abutting the on-off valve to restrict the rise of the on-off valve, and an abutment of the stopper member for supporting the stopper member and abutting the on-off valve. A stopper support member that is mounted on the lattice so that the vertical position of the part can be adjusted, and between the on-off valve and the lattice,
The exhaust gas flow passage having a flow passage cross-sectional area that varies depending on the vertical position of the on-off valve is provided, and the exhaust ventilation control device for a building according to claim 3, wherein the exhaust gas amount adjusting means covers the exhaust port. A lattice that is attached to the ceiling and has a vent, a tapered surface that is provided on the inner peripheral surface of the exhaust port and has a reduced diameter toward the indoor side, and can move up and down inside the tapered surface. When the ventilation device is stopped, the exhaust port is closed by abutting against the indoor side end of the tapered surface, and when the ventilation device is activated, the inside of the duct becomes negative pressure so that the exhaust port is separated from the tapered surface. An on-off valve that rises, a stopper member that is provided in the exhaust port and that restricts the on-off valve from rising by contacting the on-off valve, and a stopper member that supports the stopper member and abuts the on-off valve It is possible to adjust the vertical position of the part An exhaust having a flow path cross-sectional area that changes depending on the vertical position of the on-off valve between the tapered surface of the exhaust port and the outer peripheral surface of the on-off valve. A flow path is provided.

[0009]

In the ventilation structure for a building according to the first aspect of the present invention, since the exhaust air volume to the duct can be adjusted by the air volume adjustment device provided at the exhaust port of the ceiling of the room, maintenance of the air volume adjustment device and seasonal The air flow rate can be adjusted indoors according to changes in the room temperature and changes in the purpose of use of the room. Further, since it is not necessary to provide the air volume adjusting means in the ventilator, the trouble of the ventilator is drastically reduced as compared with the ventilator having the air volume adjusting means.

In the ventilation structure for a building according to the second aspect of the present invention, while the ventilation device is stopped, the on-off valve descends until it comes into contact with the lattice due to its own weight, so the ventilation port of the lattice is closed by the on-off valve. And the exhaust port is closed. Therefore, the air in the room does not flow into the duct, and the air in the duct does not flow back into the room.

On the other hand, when the ventilation device is operated, the air in the duct is discharged to the outside, so that the inside of the duct becomes a negative pressure, and the on-off valve rises to the position where it separates from the lattice and contacts the stopper member. Vents in the grid are opened. As a result, the air in the room enters the exhaust port through the ventilation port of the lattice, passes through the exhaust flow path between the on-off valve and the lattice, and then passes through the ventilation hole of the on-off valve and flows into the duct. At this time, the height at which the on-off valve rises is determined by the vertical position of the contact portion of the stopper member that abuts the on-off valve, and the higher the on-off valve rises, the higher the flow of the exhaust passage between the on-off valve and the lattice. Since the cross-sectional area of the road becomes large and the exhaust air volume increases, the exhaust air volume can be adjusted by adjusting the vertical position of the abutment part of the stopper member that abuts the on-off valve with the stopper support material attached to the grid. You can

When the on-off valve does not move due to the adhesion of dust or oil, the grid can be removed to remove the dust and oil adhering to the on-off valve from the inside of the room for maintenance.

In the ventilation structure for a building according to claim 3 of the present invention, while the ventilation device is stopped, the on-off valve descends by its own weight until it comes into contact with the indoor end of the tapered surface of the exhaust port. , The exhaust port is closed. Therefore, the air in the room does not flow into the duct, and the air in the duct does not flow back into the room.

On the other hand, when the ventilation device is operated, the air in the duct is discharged to the outside, so that the inside of the duct becomes negative pressure, and the on-off valve moves away from the tapered surface of the exhaust port to the position where it comes into contact with the stopper member. Since it rises, an exhaust passage is formed between the tapered surface and the outer peripheral surface of the on-off valve. Thereby, the air in the room enters the exhaust port from the ventilation port of the lattice, passes through the exhaust flow path between the tapered surface and the opening / closing valve, and then flows into the duct. At this time, the height at which the on-off valve rises is determined by the vertical position of the contact portion of the stopper member that abuts the on-off valve, and the higher the on-off valve rises, the more the exhaust flow path between the tapered surface and the on-off valve becomes. Since the flow passage cross-sectional area becomes large and the exhaust air volume increases, the exhaust air volume is adjusted by adjusting the vertical position of the abutting portion of the stopper member that abuts the on-off valve with the stopper support member attached to the lattice. be able to.

When the on-off valve does not move due to the adhesion of dust or oil, the grid can be removed to remove the dust and oil adhering to the on-off valve from the inside of the room for maintenance.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION First, a building ventilation structure according to a first embodiment will be described in detail with reference to FIGS.

FIG. 1 is a schematic view showing a ventilation structure of a building according to the first embodiment. In this ventilation structure, two intake side connecting portions 1 are provided.
The ventilation device F having 01, 101 and one outlet side connecting portion 102 is provided in the space CS above the ceiling, and the intake side connecting portions 101, 101 are provided with the ceilings 201, 201 of the two adjacent rooms R1, R2. Exhaust port 202 provided in
The outlet side connecting portion 103 is connected to the outside through a duct D2.

The two adjacent rooms R1 and R2 may be a bathroom and a dressing room, a toilet and a wash room, but may be a combination of rooms other than the above. When a ventilation device having three or more intake side connecting parts is used, each intake side connecting part is connected to the exhaust ports of three or more rooms.

Each of the exhaust ports 202 is formed by forming a hole in the ceiling 201 and then fitting a socket S1 into the hole. The socket S1 has a bottomed cylindrical main body 3 having an outer diameter slightly smaller than the inner diameter of the hole.
01, a flange portion 302 provided at one end of the main body portion 301, and a duct connecting portion 303 provided at the other end of the main body portion 301, and the flange portion 302 is a screw B on the ceiling. It is fixed to 201.

The feature of the first embodiment is that each room R1, R
The second exhaust port 202 is provided with an air volume adjusting device A1 capable of adjusting the exhaust air volume to the duct D1. The air volume adjusting device A1 will be described below with reference to FIGS. It should be noted that the air volume control device A1 has the same configuration regardless of which of the two exhaust ports 202 is provided.

FIG. 2 is a sectional view showing the air volume adjusting device A1. The air volume adjusting device A1 includes a lattice 1, an opening / closing valve 2, and
It comprises a stopper member 3 and a stopper support member 4.

The grid 1 is attached to the ceiling 201 with screws B together with the socket S1 while covering the exhaust port 202. FIG. 3 is a plan view showing the grating 1.
As shown in this figure, the lattice 1 has a circular outer shape, and has a screw hole 11 at the center thereof.
The four vent holes 12 are provided so as to surround the.

The on-off valve 2 is provided in the exhaust port 202 so as to be vertically movable. FIG. 4 is a plan view showing the opening / closing valve 2. As shown in FIG. 4, the opening / closing valve 2 is formed in a disk shape having a slightly smaller outer shape than the lattice 1, and the vent of the lattice 1 is formed. A vent hole 21 is provided in the central portion that does not overlap 12. The open / close valve 2 is made of plastic or rubber, and when the ventilation device F is stopped, as shown in FIG. When the device F is operating, as shown in FIGS. 6 and 7, the inside of the duct D1 becomes a negative pressure, so that the inside of the duct D1 floats up from the grid 1 and rises inside the exhaust port 202. .

The stopper member 3 has the exhaust port 202.
It is provided inside and contacts the opening / closing valve 2 to open / close the valve 2.
It has come to regulate the rise of. FIG. 5 is a perspective view showing the relationship between the on-off valve 2 and the stopper member 3. As shown in this figure, the stopper member 3 is composed of two rod-shaped members longer than the diameter of the vent hole 21 of the on-off valve 2. Are formed by intersecting and joining at their centers, and are supported and fixed to the stopper support member 4.

The stopper support member 4 is composed of a shaft portion 41 with a screw for supporting and fixing the stopper member 3 and a knob portion 42 provided at one end of the shaft portion 41. The portion 41 is screwed into the screw hole 11 of the lattice 1, and the knob portion 42 is arranged on the indoor side. Therefore, the stopper support member 4 can adjust the vertical position of the stopper member 3 that comes into contact with the on-off valve 2 by rotating the shaft portion 41, and the rotation work of the shaft portion 41 can be performed from the indoor side. This can be done by turning the knob 42.

Although the structure of the air volume adjusting device A1 has been described above, inside the exhaust port 202 provided with the air volume adjusting device A1 having the above structure, between the on-off valve 2 and the lattice 1,
An exhaust passage a whose flow passage cross-sectional area changes according to the vertical position of the on-off valve 2 is provided (see FIGS. 6 and 7).

6 and 7 are operation explanatory views of the air volume adjusting device A1.

The operation of the air volume adjusting device A1 will be described. First, while the ventilation device F is stopped, the on-off valve 2 descends by its own weight until it comes into contact with the lattice 1 as shown in FIG. The ventilation port 12 of the grid 1 is closed by the on-off valve 2, and the exhaust port 202 is closed. Therefore, the air in the room does not flow into the duct D1,
The air in the duct D1 does not flow back into the room.

On the other hand, when the ventilation device F is operated, the air in the duct D1 is discharged to the outside, so that the inside of the duct D1 becomes a negative pressure, and as shown in FIG. 6 and FIG. The air vent 12 of the lattice 1 is opened because it moves up from the position 1 to the position where it comes into contact with the stopper member 3. Thereby, the air in the room enters the exhaust port 202 from the ventilation port 12 of the lattice 1, passes through the exhaust flow path a between the on-off valve 2 and the lattice 1, and then passes through the ventilation hole 21 of the on-off valve 2. Flow into the duct D1. At this time, the rising height of the on-off valve 2 is
This is determined by the vertical position of the stopper member 3 that comes into contact with the opening / closing valve 2. The higher the opening / closing valve 2 is, the larger the flow passage cross-sectional area of the exhaust passage a between the opening / closing valve 2 and the lattice 1 becomes, and the exhaust air flow rate increases. Therefore, the exhaust air flow rate can be adjusted by adjusting the vertical position of the stopper member 3 that contacts the on-off valve 2 with the stopper support member 4 mounted on the lattice 1. That is, the flow passage cross-sectional area of the exhaust flow passage a is larger when the on-off valve 2 is at the higher position as shown in FIG. 6 than when the on-off valve 2 is at the lower position as shown in FIG. Therefore, the exhaust flow rate also increases.

When the on-off valve 2 does not move due to the attachment of dust or oil, the grid 1 is removed and the dust and oil attached to the on-off valve 2 is removed from the indoor side.

In other words, since it is possible to perform air volume adjustment and maintenance of the air volume adjusting device A1 from inside the room, it is possible to greatly reduce the time and labor required for these operations, and to adapt to seasonal changes and changes in the purpose of use of the room. It is also possible to easily adjust the air volume. Moreover, since the air volume can be adjusted without using a drive device such as a motor, manufacturing cost and running cost can be reduced.

Further, since it is not necessary to provide the ventilation device F with an air volume adjusting means, troubles of the ventilation device F are drastically reduced and maintenance is easy.

Next, the building ventilation structure according to the second embodiment will be described in detail with reference to FIGS. In describing the building ventilation structure according to the second embodiment, only a configuration different from the building ventilation structure according to the first embodiment will be described.

FIG. 8 is a sectional view showing an air volume adjusting device A2 used for the ventilation structure of the building according to the second embodiment. The socket S2 forming the exhaust port 202 is a cylindrical main body 304 and its main body. Flange portion 305 provided at one end of 304
And a locking piece 306 provided on the outer periphery of the flange portion 305 so as to project in a direction opposite to the main body portion 304,
The flange portion 305 is fixed to the ceiling 201 with a screw B, and one end of the main body portion 304 is connected to the duct D1. Further, a taper surface 307 having a diameter reduced toward the indoor side is provided on the inner peripheral surface of the indoor side end portion of the socket S1.

The air volume adjusting device A2 used in this ventilation structure includes a tapered surface 307 of the socket S2, a lattice 5, a filter 6, an opening / closing valve 7, a stopper member 8, and
And a stopper support member 9.

The lattice 5 is attached to the ceiling 201 with screws B together with the socket S2 while covering the exhaust port 202. The lattice 5 has a through hole 51 in the center, four ventilation holes 52 are provided so as to surround the through hole 51, and a protruding piece 53 is provided on the back surface along the outer periphery.
And a cylindrical wall 54 is projected on the peripheral edge of the through hole 51.

The filter 6 adsorbs dust, dirt, and pollen that pass through the ventilation port 12, and is formed in a donut shape having a hole into which the cylindrical wall 54 is fitted, as a center. It is attached to the back surface of the lattice 5 so as to close the mouth 12.

The opening / closing valve 7 is formed in a disk shape having an outer diameter substantially equal to the inner diameter of the indoor end of the tapered surface 307 of the socket S2, and is provided in the exhaust port 202 so as to be vertically movable. When the ventilation device F is stopped, as shown in FIG. 8, the exhaust port 202 is closed by contacting the indoor end of the tapered surface 307 and the tubular wall 54 of the lattice 5, and the ventilation device F is operated. At this time, as shown in FIG. 11 and FIG. 12, the inside of the duct D1 becomes a negative pressure, so that the inside of the duct D1 is separated from the tapered surface 307 to rise in the exhaust port 202. The on-off valve 7 is made of rubber,
It is formed so as to become thinner from the center toward the outer periphery, and it is possible to secure high adhesion when it comes into contact with the tapered surface 307. Furthermore, this on-off valve 7
As shown in FIG. 9, an insertion hole 71 smaller than the outer diameter of the cylindrical wall 54 of the lattice 5 is provided in the central portion, and the periphery of the insertion hole 71 is a ring member 72 made of plastic or metal. It is reinforced with.

As shown in FIG. 10, the stopper member 8 has a plurality of leaf springs 81 having a dogleg-shaped bent portion 811 in the middle thereof, and these leaf springs 81 have the bent portions. 811 are arranged so as to face radially outward, and the upper end portion and the lower end portion are fixed to the pair of connecting members 82 and 83, respectively, and screw holes 821 are formed in the upper connecting member 82, and the lower connecting member is formed. A through hole 831 is formed in 83. Further, the stopper member 8 is erected inside the exhaust port 202 with its lower end inserted through the insertion hole 71 of the opening / closing valve 7 and held inside the tubular wall 54 of the lattice 5. The rise and fall of the on-off valve 7 is restricted by the bent portion 811 contacting the on-off valve 7.

The stopper support member 9 is a shaft portion 9 with a screw.
1 and a knob 92 provided at one end of the shaft 91
The shaft portion 91 is inserted through the through hole 51 of the lattice 5 and the through hole 831 of the stopper member 8 into the stopper member 8 and is screwed into the screw hole 821 of the stopper member 8. The stopper member 8 is supported by being combined. That is, when the shaft portion 91 of the stopper support member 9 is rotated, the upper end portion of the stopper member 8 moves along the shaft portion 91 while elastically deforming the bent portion 811 of the stopper member 8 and its peripheral portion, so that the opening and closing is performed. The vertical position of the bent portion 811 that abuts the valve 7 can be adjusted. Further, the rotation work of the shaft portion 91 can be performed by rotating the knob portion 92 from the indoor side.

Although the structure of the air volume adjusting device A2 has been described above, the tapered surface 30 of the socket S2 is provided inside the exhaust port 202 in which the air volume adjusting device A2 having the above structure is provided.
7 and the outer peripheral surface of the opening / closing valve 7, an exhaust passage b whose flow passage cross-sectional area changes according to the vertical position of the opening / closing valve 7 is provided (see FIGS. 11 and 12).

11 and 12 show the air volume adjusting device A
It is operation | movement explanatory drawing of 2.

The operation of the air volume adjusting device A2 will be described. First, while the ventilation device F is stopped, as shown in FIG. 8, the opening / closing valve 7 is placed on the indoor side of the tapered surface 307 of the exhaust port 202 by its own weight. The exhaust port is closed because it descends until it abuts the end. Therefore, the air in the room does not flow into the duct D1, and the air in the duct D1 does not flow back into the room.

On the other hand, when the ventilator F is operated, the air in the duct D1 is discharged to the outside, so that the inside of the duct D1 becomes negative pressure, and the opening / closing valve 7 becomes the tapered surface 30 of the exhaust port 202.
7 and rises to a position where it comes into contact with the stopper member 8, an exhaust passage a is formed between the tapered surface 307 and the outer peripheral surface of the on-off valve 7, as shown in FIGS. As a result, the air in the room is ventilated in the lattice 1
After entering the exhaust port 202 from 2, it passes through the exhaust flow path b between the tapered surface 307 and the on-off valve 7, and then flows into the duct D1. At this time, the height at which the open / close valve 7 rises is determined by the vertical position of the bent portion 811 of the stopper member 8 that abuts the open / close valve 7, and the higher the open / close valve 7 rises, the tapered surface 30
Since the flow passage cross-sectional area of the exhaust flow passage b between the switch 7 and the on-off valve 7 is increased and the exhaust air volume is increased, the bent portion 8 of the stopper member 8 is changed by the stopper support member 9 attached to the lattice 5.
The exhaust air volume can be adjusted by adjusting the vertical position of 11. That is, the flow passage cross-sectional area of the exhaust flow passage b is larger when the on-off valve 7 is at the higher position as shown in FIG. 11 than when the on-off valve 7 is at the lower position as shown in FIG. Therefore, the exhaust flow rate also increases.

When the open / close valve 7 does not move due to adhesion of dust or oil, the grid 5 is removed to remove the dust or oil adhered to the open / close valve 7 from the inside of the room.

That is, since the air volume adjustment and maintenance of the air volume adjustment device A2 can be performed from the room, the labor required for these operations can be significantly reduced, and it can be adjusted according to the change of seasons or the purpose of use of the room. It is also possible to easily adjust the air volume. Moreover, since the air volume can be adjusted without using a drive device such as a motor, manufacturing cost and running cost can be reduced.

Further, since it is not necessary to provide the ventilation device F with an air volume adjusting means, troubles of the ventilation device F are drastically reduced and maintenance is easy.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the scope of the present invention. However, it is included in the present invention. For example, in the embodiment, the example in which the lattice 5 and the on-off valve 7 are also formed in a circle corresponding to the circular exhaust port 202 has been described, but the exhaust port 202 is formed in a quadrangle and the lattice 5 is formed corresponding thereto. The open / close valve 7 may also be formed in a square shape. Needless to say, the shape of the lattice is not limited to one having crosspieces in two directions orthogonal to each other, and may include one in which crosspieces are provided in a radial shape or one in which the crosspieces are provided in a concentric shape. In the embodiment, each room R1,
Although the example in which the exhaust port 202 of R2 is connected to different air supply side connection parts 101 of the ventilation device F is shown, as shown in FIG. 13, the exhaust ports 202 of a plurality of rooms are connected to the same air supply side connection part. It may be connected to 101.

[0049]

As described above, in the ventilation structure for a building according to claim 1 of the present invention, since it is possible to perform maintenance of the air volume adjustment function and the air volume adjustment function from inside the room, it is possible to greatly reduce the labor required for these operations. The effect is that the air flow rate can be easily adjusted according to the change of seasons or the purpose of use of the room. Further, since it is not necessary for the ventilation device to have a function of adjusting the air volume, troubles of the ventilation device are drastically reduced, and maintenance and management can be easily performed.

Furthermore, in the ventilation structure for a building according to claim 2 of the present invention and the ventilation structure for a building according to claim 3 of the present invention, the air volume can be adjusted without using a drive device such as a motor. The manufacturing cost and running cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall view showing a ventilation structure of a building according to a first embodiment.

FIG. 2 is a cross-sectional view showing an air volume adjusting device used in the building ventilation structure according to the first embodiment.

FIG. 3 is a plan view showing a lattice of the air volume adjusting device.

FIG. 4 is a plan view showing an on-off valve of the air volume control device.

FIG. 5 is a perspective view showing a relationship between an on-off valve and a stopper member of the air volume adjusting device.

FIG. 6 is an operation explanatory view of the air volume adjusting device.

FIG. 7 is an operation explanatory view of the air volume adjusting device.

FIG. 8 is a cross-sectional view showing an air volume control device used in a building ventilation structure according to a second embodiment.

FIG. 9 is a perspective view showing an on-off valve of the air volume control device.

FIG. 10 is a perspective view showing a stopper member of the air volume adjusting device.

FIG. 11 is an operation explanatory view of the air volume adjusting device.

FIG. 12 is an operation explanatory view of the air volume adjusting device.

FIG. 13 is a diagram showing a modified example of the connection state of the ventilation device and the exhaust port.

[Explanation of symbols]

 CS Space above the ceiling R1, R2 Room F Ventilation device D1, D2 Duct 201 Ceiling 202 Exhaust port A1 Air volume control device 1 Lattice 12 Vent port 2 Open / close valve 21 Vent hole 3 Stopper member 4 Stopper support material a Exhaust flow path A2 Air volume control device 5 Lattice 52 Vent 7 Open / close valve 8 Stopper member 811 Bending part (contact part) 9 Stopper support material b Exhaust flow path

Claims (3)

[Claims] 1. A ventilation structure in which a ventilation device is provided in a space above a ceiling, and a connecting portion of the ventilation device is connected to an exhaust port provided in each ceiling of a plurality of rooms via a duct, A ventilation structure for a building, characterized in that an air volume control device capable of adjusting the exhaust air volume to the duct is installed at the mouth. 2. The exhaust amount adjusting device is attached to the ceiling in a state of covering the exhaust port and has a ventilation port, and the exhaust amount adjusting device is provided in the exhaust port so as to be movable up and down. It has a ventilation hole at a position that does not overlap with the ventilation port, and when the ventilation device is stopped, it abuts on the lattice and closes the exhaust port, and when the ventilation device is activated, it becomes a negative pressure in the duct and rises from the lattice. An on-off valve that rises in the exhaust port, a stopper member that is provided in the exhaust port and that contacts the on-off valve to restrict the rise of the on-off valve, and a stopper member that supports the stopper member and abuts the on-off valve. A stopper support member that is mounted on the lattice so that the vertical position of the contact portion of the stopper member can be adjusted, and flows between the on-off valve and the lattice according to the vertical position of the on-off valve. Exhaust flow with varying road cross section The ventilation structure according to claim 1, wherein a passage is provided. 3. The exhaust amount adjusting means is attached to the ceiling in a state of covering the exhaust port and has a ventilation hole, and the exhaust gas adjusting means is provided on the inner peripheral surface of the exhaust port and is directed toward the indoor side. And a tapered surface that is reduced in diameter, and is vertically movable inside the tapered surface.When the ventilation device is stopped, it abuts the indoor end of the tapered surface to close the exhaust port, and when the ventilation device is operating. An on-off valve that rises in the exhaust port away from the tapered surface due to a negative pressure in the duct; and a stopper member that is provided in the exhaust port and abuts on the on-off valve to restrict the rise of the on-off valve. A stopper support member that supports the stopper member and is mounted on the lattice so that the vertical position of the contact portion of the stopper member that contacts the on-off valve can be adjusted, and a tapered surface of the exhaust port. Between the outer peripheral surface of the on-off valve The ventilation structure according to claim 1, further comprising: an exhaust flow passage having a flow passage cross-sectional area that changes depending on a vertical position of the on-off valve.