JPH0642018A - Ventilator - Google Patents

Abstract

PURPOSE:To prevent bad odor from leaking to the outside by a method wherein the interior of the title device is isolated from the outside when the interior is under positive pressure, and deformation is made so that the capacity of a variable space communicated with the interior space can be made large. CONSTITUTION:In the case where an interior space 11a of a ventilator body 11 is under stationary pressure, an opening 12 of a valve 13 is closed. At this time, the pressure in a space 17a communicating with the outside air becomes higher than the pressure in a space 17b communicating with the interior space 11a, and thereby a partitioning material 18 is deformed so that the volume of the interior space 11a can be enlarged. The capacity of the largely deformed space 17b is set so that it can absorb the amount of exhaust from a vent pipe 3. In the case where the interior space 11a of the ventilator body 11 is under negative pressure, the inside air is put back to the ventilator body 11 after making the volume of the variable space small, and thereby leakage of bad odor from the exhaust can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device for preventing odor leakage of drainage ventilation to the outside when connected to ventilation piping.

[0002]

2. Description of the Related Art As a device for discharging the air in a drain pipe installed indoors, as shown in FIG. 10, a drain stack 2 is connected to a drain horizontal main pipe 1 and a drain horizontal branch pipe 1a installed indoors, An aeration standpipe 3 is provided in parallel with the drainage standpipe 2, one end of the aeration standpipe 3 is connected to the middle portion in the lengthwise direction of the drainage standpipe 2, and the other end is extended to the outer surface of the wall part, The outside air venting device 4 is attached to this extension, and the ventilation stack 3 and the drain stack 2 are connected by a ventilation pipe 5, which occurs when the drainage pipe starts to drain water. It is known that the air in the drainage pipe is discharged to the outside from the ventilation stack 3 through an opening provided in the ventilation device 4.

[0003]

The ventilation device attached to the ventilation stack is an open air type having an opening communicating with the outside air. In this ventilation device, if the inside of the ventilation device has a negative pressure, Since the air in the drainage pipe is not discharged outdoors, the problem of odor accompanying exhaustion does not occur, but if the inside of the ventilation device has a positive pressure, it is not possible to prevent the discharge of the air in the drainage pipe to the outside, The air in the drainage pipe is exhausted to the outside, so that there is a problem that the odor contained in the exhaust air discharged to the outside through the ventilation device affects the surrounding environment. That is, at the start of drainage, the pressure of air with a volume almost equal to the volume of drainage is applied to the drainage pipe and the inside of the drainage pipe becomes positive pressure.However, if the air in this drainage pipe is not discharged to the outside of the drainage pipe, the trap seal is closed. Water will blow out, the odor control function of the trap will not work, and the odor in the drain pipe will enter the room through the trap. Also,
When the drainage begins to flow down, the negative pressure is generated due to the flow velocity of the drainage, and the pressure inside the drainage pipe becomes negative pressure.At that time, if the air outside the drainage pipe is not guided into the drainage pipe, the trap water in the trap will be inside the drainage pipe. The odor control function of the trap does not work, and the odor in the drain pipe enters the room through the trap. Further, in order to dispose the ventilation device on the outside of the outer wall, it is necessary to provide a ventilation pipe penetrating the outer wall. In this case, a rainwater leakage accident in which rainwater enters the interior through a through opening provided in the outer wall. There is a problem that occurs, moreover, disposing the ventilation device outside the outer wall is
It impairs the aesthetics of the building as a whole, which is not practically preferable.

On the other hand, the flow of air inside the drainage pipe and the ventilation pipe depends on the installation conditions, but the phenomenon that the inside of the ventilation pipe has a positive pressure and the air in the drainage pipe blows out through the ventilation device is the drainage. It was found that the air in the pipe is limited to an extremely short time from the drain side branch pipe to the drainage stack pipe, and in other cases, the inside of the ventilator becomes a negative pressure, and the air in the drain pipe receives the suction action, It was found that the air in the drain never blows through the venting device.
The present invention has been made in view of the above points, and suppresses the discharge of the air in the drainage pipe to the outside at the time of positive pressure inside the ventilation device, and the air in the drainage pipe generated when passing the drainage into the drainage pipe does not leak to the outside. It is an object of the present invention to provide a ventilation device of the above type.

[0005]

The venting device of the present invention has a main body portion having a connecting portion connected to the ventilation pipe, and an internal space of the main body portion closed by positive pressure and opened by negative pressure. And a variable space that separates it from the outside air.The variable space is connected to the main body so as to communicate with the internal space of the main body, and the variable space has a large volume at positive pressure and a small volume at negative pressure. And a ventilation storage device that operates.

[0006]

In the ventilating device of the present invention, when the internal space of the main body portion has a positive pressure, the air in the drain pipe is guided to a variable space having a large volume which communicates with the internal space of the main body portion of the ventilating and accommodating device, and the drainage is performed. When the air inside the pipe is prevented from leaking to the outside and the internal space of the main body part is under negative pressure, the variable space communicating with the internal space of the main body part of the ventilation housing device has a small volume, and the drain pipe housed in the variable space is The air is returned to the main body side to prevent the odor of the exhaust gas stored in the exhaust gas storage space from leaking to the outside.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a ventilation device 10 according to the invention,
The main body portion 11 of the ventilation device 10 is, for example, an iron plate or an A plate.
It is molded from BS resin. A plurality of openings 12, 12, ... Are formed at intervals in the circumferential direction on the upper surface of the main body portion 11 of the ventilation device 10. As shown in FIG. 2, a valve device 13 is arranged in each of the openings 12 so as to close the opening with a positive pressure and open the opening with a negative pressure. This valve device 13
For example, in the case of a check valve, the base end side of the valve body is pivotally attached to a support portion 13a provided in the body portion 11, and the support portion 13a
It is rotatable in the vertical direction about the pivot point of a.
The check valve 13 has an internal space 11 a of the main body 11.
Is a negative pressure, receiving the suction force from the internal space 11a, the opening 12 is opened at a position away from the opening 12 as shown by the dotted line, and the internal space 11a of the main body portion 11 has a positive pressure. In this case, when pressure is applied from the internal space 11a, the opening 1 is located at a position in contact with the opening 12 as shown by the solid line.
Close 2 Connecting portion 14 provided at the bottom of the main body portion 11
Is connected to a pipe 15 such as a ventilation pipe.

On the other hand, on the upper surface of the main body portion 11 of the ventilation device 10, a tubular body 16 is integrally or integrally arranged so as to extend upward. The tubular body 16 may be separated from the main body portion 11 and detachably attached to the main body portion 11. Making the tubular body 16 separate enables replacement of the tubular body 16. The cylindrical body 16 is located at a position radially inward of the opening 12 on the upper surface of the main body portion 11, and communicates the internal space 17 with the internal space 11 a of the main body portion 11. The volume of the internal space 17 of the tubular body 6 is set to a size that can accommodate the amount of exhaust gas discharged from the pipe 15. Then, in the internal space 17 of the tubular body 16,
Space 17a for communicating the internal space 17 of the tubular body 16 with the outside air
17b communicating with the internal space 11a of the main body 11
A partition member 18 for partitioning is arranged. The partition member 18 is formed of, for example, thin rubber and has a tubular shape with one end opened. The opening-side end 19 is sealed and joined to the upper end of the tubular body 16, and the lower end 20 is fixed to the tubular body 16. Has been done. Therefore, the partition member 18 moves around the fixed lower end 20 with the side walls kept elastic, and changes the volumes of the spaces 17a and 17b according to the magnitude of the exhaust pressure. .

When used, the ventilation device 10 is arranged in an indoor wall space so as not to be exposed to the outside, as shown in FIG. In FIG. 1, reference numeral 21 is a dust cover of the tubular body 16.
May be integrally formed with the tubular body 16 or may be detachably attached to the tubular body 16 separately from the tubular body 16.

Next, the operation will be described. The ventilation device 10
As shown in FIG. 6, it is attached to the ventilation stack 3 communicating with the exhaust pipe, but the internal space 1 of the main body portion 11 of the ventilation device 10 is
When 1a is a steady pressure, as shown in FIG. 3, the valve device 13 provided in the main body portion 11 closes the opening 12, and the partition member 18 has the pressure on the side of the space 17a that communicates with the outside air communicates with the internal space 11a. Since the pressure is higher than the pressure on the space 17b side, the partition member 18 is deformed so that the internal space 17a has a large volume.

Next, when drainage flows in the drainage pipe, the internal space 11a of the main body portion 11 connected to the ventilation pipe 3 is positively pressured for a short time when the drainage flows from the drainage lateral branch pipe 1a to the vertical pipe 2 at the start of drainage. As shown in FIG. 4, the internal space 17b of the partition member 18 is deformed so as to have a large volume, and the exhaust gas introduced from the ventilation pipe 3 into the internal space 11a of the main body portion 11 is deformed to have a large volume. Is housed. Since the capacity of the deformed internal space 17b is set to a capacity capable of accommodating this exhaust amount, the partition member 18
Excessive pressure will not act on.

Next, when the internal space 11a of the main body portion 11 connected to the ventilation pipe 3 has a negative pressure, the exhaust gas stored in the internal space 17b of the partition member 18 is returned to the drain side as shown in FIG. The partition member 18 is deformed so that the internal space 17b has a small volume, and then the valve device 13 provided in the opening 12 of the main body portion 11 opens the opening 12 so that the sealing water of the trap is not broken during drainage. Inhale the necessary air. Then, when the air required for drainage is sucked, the internal space 11a of the main body portion 11 becomes a constant pressure, and the valve device 13 provided in the opening 12 of the main body portion 11 as shown in FIG.
Closes the opening 12, and the partition member 18 has an internal space 17b.
Is deformed to have a small volume.

7 to 9 show a modification of the present invention,
In the modification shown in FIG. 7, the opening 30 is provided on the side of the body portion 11.
The valve device 32 is provided in the opening 30 and is pressed by the spring 31 in the closing direction. This valve device 32
Is a negative pressure in the internal space 11a of the main body portion 11,
It acts to open against the force of the spring.

In a modification shown in FIG. 8, a member 41 which expands and contracts in a bellows shape is attached to the opening 40 provided on the upper surface of the main body portion 11, and the elastic member 41 is attached to the internal space 11a of the main body portion 11.
Keeps the solid line state when the pressure is negative and keeps the internal space 11a of the main body portion 11 keeps the state of the positive pressure time line, and exhausts the gas introduced into the internal space 11a of the main body portion 11 to the elastic member 4
It accommodates in the internal space of 1.

In the modification shown in FIG. A member 50 that expands and contracts in a bellows shape is arranged inside the cylindrical body 16 provided in the main body portion 11, the upper end of the elastic member 50 is fixed to the upper surface of the cylindrical body 16, and the plate member 51 also serves as a weight at the lower end. Are fixed so that the elastic member 50 maintains a desired shape according to the change in pressure.

[0017]

As described above, according to the present invention, by suppressing the blowout of the air in the drainage pipe to the outside at the time of positive pressure inside the ventilation device, the air in the drainage pipe is generated when the drainage is passed through the drainage pipe. It is possible to prevent the contained odor from leaking to the outside and to arrange the device between the walls inside the building so as not to be exposed to the outside.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a ventilation device according to the present invention.

FIG. 2 is a partial cross-sectional view of the main body portion of the ventilation device according to the present invention.

FIG. 3 is a diagram showing a positional relationship of members when the ventilation device according to the present invention is stationary in a pipe.

FIG. 4 is a diagram showing a positional relationship of members of the ventilation device according to the present invention during positive pressure in a pipe.

FIG. 5 is a diagram showing a positional relationship of members of the ventilation device according to the present invention when a negative pressure is applied in a pipe.

FIG. 6 is a view showing a use state of the ventilation device according to the present invention.

FIG. 7 is a view showing a modification of the valve device provided in the main body of the ventilation device according to the present invention.

FIG. 8 is a view showing a modified example of the ventilation containing device provided in the main body portion of the ventilation device according to the present invention.

FIG. 9 is a view showing a modified example of the ventilation containing device provided in the main body portion of the ventilation device according to the present invention.

FIG. 10 is a view showing a usage state of a conventional ventilation device.

[Explanation of symbols]

 2 Drainage stack pipe 3 Ventilation stack pipe 10 Ventilation device 11 Main body part 11a Internal space 12 Opening 13 Valve device 14 Connection part 16 Cylindrical body 17a Internal space 17b Internal space 18 Partition member

Claims (1)

[Claims] 1. A main body portion having a connecting portion connected to a ventilation pipe, a valve device arranged in the main body portion, which operates so that the internal space of the main body portion is closed by positive pressure and opened by negative pressure, and a variable partitioning from outside air. An aeration device having a space, which is connected to the main body portion so that the variable space communicates with the internal space of the main body portion, and the variable space has a large volume at positive pressure and a small volume at negative pressure.