JPH06299582A - Deodorizing apparatus for toilet bowl - Google Patents

Abstract

PURPOSE:To prevent nasty odor from coming into a toilet bowl from a waste pipe. CONSTITUTION:A rim water passage 3 is provided to the upper edge of a toilet bowl 2 of a Western style toilet 1. A trap 4 at the bottom of the toilet bowl 2 is made to communicate with a waste pipe 7 through a drainage socket 5. A deodorization suction hole 8 on the upper part of the toilet bowl 2 is made to communicate with a hose connecting part 13 of the drainage socket 5 through an intake duct 9, a deodorization fan 10, a check valve 11 and an exhaust hose 12. A pressure switch 14 for controlling operations of the check valve 11 and the deodorization fan 10 is provided to the exhaust hose 12. The check valve 11 is shut not only in the case where backflow actually occurs, but also in the case where the flow is weak in direct flow. As coming-up of nasty odor occurring not only on occasion of backflow in the exhaust, but also on occasion of dissipation can be prevented, coming of the nasty odor into the toilet bowl can be prevented certainly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet deodorizing device, and more particularly to a toilet deodorizing device configured to discharge odors in a toilet bowl downstream of a trap portion.

[0002]

2. Description of the Related Art A toilet deodorizing device of this type is provided with an exhaust passage for communicating the inside of the toilet bowl of the toilet with the downstream side of the trap portion, and a deodorizing fan provided in the exhaust passage. Also,
The exhaust passage is usually provided with a check valve that is closed when the deodorizing fan is not operating. When the deodorizing fan is operated, the odor in the toilet bowl is discharged to the sewer or the septic tank via the drain pipe.

[0003]

The operation of the check valve is controlled by opening and closing a switch of a pressure sensor installed in the exhaust passage downstream of the check valve. Assuming that the pressure in the exhaust passage downstream of the check valve near the pressure sensor installation position is P _S and the exhaust air pressure of the deodorizing fan is P _F , P _S > P _{F in the} conventional check valve operation control.
The check valve was closed only when there was a possibility of reverse flow. As a result, when the exhaust flow is stopped when the upstream and downstream sides of the check valve where P _S = P _F are the same, or when the exhaust pressure is a positive pressure that is only slightly lower than the pressure in the pipe. However, when the amount of normal wind is small, the check valve is opened. In this case, although the wind flow in the exhaust passage is not a reverse flow, the diffusion speed of the odor exceeds the normal wind speed, so the odor is propagated (upstream) from the downstream side of the trap section to the inside of the toilet bowl by diffusion. There are drawbacks.

[0004]

In the toilet deodorizing device of the present invention, a toilet bowl communicating with a drain port through a trap and a communication inside the toilet bowl with a secondary side of the trap downstream of the trap. An exhaust passage, a deodorizing fan provided in the exhaust passage and capable of sending air to the trap secondary side, and a backflow prevention valve provided in the exhaust passage on the trap secondary side of the deodorizing fan, A pressure detector for detecting the pressure in the exhaust passage on the secondary side of the trap with respect to the check valve, and a control means for opening and closing the check valve according to the pressure detected by the pressure detector. In the toilet deodorizing device, the control means closes the check valve when the pressure detected by the pressure sensor becomes equal to or higher than a predetermined pressure that is slightly lower than the exhaust air pressure of the deodorizing fan. It is what

According to a second aspect of the invention, there is provided the toilet deodorizing device according to the first aspect, wherein the pressure detector is a wind pressure switch.

[0006]

In the toilet bowl deodorizing apparatus of the present invention, the odor near the toilet bowl is discharged to the downstream side of the trap section by the exhaust passage with the deodorizing fan connecting the toilet bowl and the downstream side of the trap section.
Further, in order to prevent the odor from flowing back into the toilet bowl when the pressure on the downstream side of the trap portion becomes high for some reason, a check valve is installed in the exhaust passage.

In the present invention, the check valve is controlled based on the pressure detected by the pressure sensor installed downstream of the check valve in the exhaust passage. In the toilet deodorizing device according to claim 1, when the pressure detected by the pressure sensor reaches a predetermined pressure that is slightly lower than the exhaust pressure of the deodorizing fan, the check valve is closed to remove the odor caused by the reverse flow of exhaust gas. Not only the run up but also the run up due to the diffusion of odors is prevented.

In the toilet deodorizing device of the second aspect, since the wind pressure sensor is adopted as the pressure sensor, the structure is simple.

[0009]

Embodiments will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of a Western-style toilet 1 equipped with a toilet deodorizing apparatus according to this embodiment. In FIG.
A rim water passage 3 is provided on the upper edge of the toilet bowl 2 of the Western-style toilet 1. The trap 4 at the bottom of the toilet bowl 2 is connected to a drain pipe 7 via a drain socket 5. A deodorant suction port 8 is provided on the inner side of the upper edge of the toilet bowl 2 (at the base of the shower toilet nozzle). The deodorizing suction port 8 is communicated with the hose connecting portion 13 of the drain socket 5 via an intake duct 9, a deodorizing fan 10, a check valve 11 and an exhaust hose 12, and these constitute an exhaust passage. . A pressure sensor 14 is attached to the opening of the peripheral wall of the exhaust hose 12 immediately downstream of the check valve 11 to detect the pressure immediately downstream of the check valve 11. Pressure sensor 1
Reference numeral 4 is a sensor for controlling the operation of the deodorizing fan 10 and the check valve 11, and when the pressure above the preset location is detected, the deodorizing fan 10 is stopped and the check valve 11 is closed.

FIG. 2 shows the pressure sensor 14 according to this embodiment.
FIG. The pressure sensor 14 has a structure in which a micro switch 18 is attached to a pressure sensor main body 15 via a mounting plate 16 and a switch base 17 with two machine screws 19. The pressure sensor 14 is attached to the downstream side of the check valve 11 by a screw member or the like using a mounting plate 16, and at that time, the hose end 20 is fitted into the opening of the peripheral wall of the exhaust hose 12.

Next, FIG. 3 is a sectional view taken along line AA in the side view of the pressure sensor 14 shown in FIG. In FIG.
The pressure sensor main body 15 has a structure in which a disc-shaped pressure receiving plate 22 having a rubber diaphragm 21 on its peripheral edge is sandwiched between an upper cover 23 and a lower cover 24 and fixed by a press. . Pressure sensor body 1
The inside of 5 is airtightly divided into an upper chamber 21a and a lower chamber 21b by the pressure receiving plate 22 and the diaphragm 21.

A spacer 25 having a through hole at the center is attached to the upper surface of the lower cover 24, and the above-mentioned hose end 20 is provided to project from the lower surface of the lower cover 24. A protrusion 22a is provided on the upper surface of the central portion of the pressure receiving plate 22,
The protrusion 22a is connected to a movable button portion of the micro switch 18 via a spring 26. The central portion of the pressure receiving plate 22 is connected to the upper cover 23 via a rubber damper. The two terminals 28 are terminals for extracting electric signals.

The hose end 20 of the pressure sensor 14 described above.
Through this, the pressure in the exhaust hose 12 is transmitted to the lower chamber 21b inside the pressure sensor body 15. This lower chamber 21b
When the internal pressure becomes higher than the set value, the pressure receiving plate 22 rises and the projection 22a on the upper surface of the central portion of the pressure receiving plate 22 also rises, and the micro switch 18 is operated via the spring 26. The micro switch 18 is the deodorizing fan 10 as described above.
And the operation of the check valve 11 is controlled.

The operation of the toilet deodorizing device of this embodiment having the pressure sensor 14 having such a configuration will be described with reference to FIG. FIG. 4 is a schematic diagram showing the structure of the exhaust passage. When exhaust gas pressure in the region directly downstream of the deodorizing fan 10 is P _F and pipe pressure in the vicinity of the pressure sensor 14 is P _S , P _F = P _S holds. If the exhaust gas pressure and the pipe pressure are equal, the exhaust passage is in the exhaust passage. No gas flow occurs. In this case, if the check valve 11 is open, the odor will pass through the exhaust passage from the downstream side of the exhaust hose 12 and will go up into the toilet bowl 2 through the deodorant suction hole 8. Therefore, in this embodiment, the check valve is closed even when P _F = P _S. In addition, even when the airflow velocity in the forward flow direction toward the drainage pipe 7 in the exhaust passage is minute, if the check valve 11 is open, the odor rises due to diffusion. Therefore, also in this case, the check valve 11
Close the valve. In order to prevent the odor from rising due to diffusion, the absolute value of the odor diffusion rate is set to V _d , and in the check valve 11 part, the check valve 1 from the upstream side of the check valve 1 is checked.
(1) An exhaust gas flow velocity equal to or higher than the diffusion velocity V _d is required toward the downstream side. Therefore, in the present invention, the check valve 11 is opened only when the pipe internal pressure is such that the forward exhaust speed is higher than the odor diffusion speed V _d . As a result of various experiments, the pressure detected by the pressure sensor that switches the check valve to open and close (hereinafter, sometimes referred to as a threshold pressure) is about 1 to 4 mmAq (especially about 2 mmA) from the exhaust air pressure P _F of the deodorizing fan 10.
(q) It has been confirmed that if the pressure is lower than that, odor upstream is always reliably prevented. Threshold pressure is (P _F -2) mm
When set to Aq, of course, P _S ≧ (P _F −
In the case of 2), the check valve 11 is closed and P _S <(P _F
At the time of -2), the check valve 11 is opened. Although a Western style toilet is shown as the toilet in this embodiment, it may be a Japanese style toilet or a urinal.

In this embodiment, the pressure sensor 14 uses a wind pressure switch that opens and closes the switch at an arbitrary pressure. By using this wind pressure switch, it is possible to simply manufacture an electric circuit for controlling the operation of the check valve 11 and the deodorizing fan 10, leading to a reduction in manufacturing cost.

[0017]

As described above, according to the toilet deodorizing device of the present invention, not only the backflow of odor but also the diffusion of odor can be prevented by the operation of the backflow prevention valve provided with the pressure sensor.

According to the toilet deodorizing device of the second aspect, the structure of the control device for controlling the opening and closing of the check valve is simplified and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a western-style toilet provided with a toilet deodorizing device according to an embodiment.

FIG. 2 is a side view of the pressure sensor according to the embodiment.

FIG. 3 is a cross-sectional view of a pressure sensor according to an example.

FIG. 4 is a schematic system diagram of an exhaust passage according to an embodiment.

[Explanation of symbols]

1 toilet stool 2 bowl 4 trap section 7 drainage pipe 8 deodorizing inlet 9 air inlet duct 10 deodorization fan 11 check valve 12 exhaust hose 14 pressure sensor 18 microswitch 20 hose end 21 the diaphragm 22 the pressure receiving plate 26 spring 27 damper P _F discharge Wind pressure P _S Pipe pressure

Claims (2)

[Claims] 1. A toilet bowl communicating with a drain outlet through a trap, an exhaust passage communicating the inside of the toilet bowl with a secondary side of the trap downstream of the trap, and an exhaust passage provided in the exhaust passage. A deodorizing fan capable of blowing air to the secondary side of the trap, a backflow prevention valve provided in an exhaust passage on the secondary side of the trap with respect to the deodorizing fan, and a secondary side of the trap with respect to the secondary side of the backflow prevention. In a toilet deodorizing device comprising a pressure detector that detects the pressure in the exhaust passage, and a control unit that opens and closes the check valve according to the pressure detected by the pressure detector, A toilet deodorizing device, characterized in that the check valve is closed when the pressure detected by the sensor becomes equal to or higher than a predetermined pressure that is slightly lower than the exhaust pressure of the deodorizing fan. 2. The toilet deodorizing device according to claim 1, wherein the pressure detector is a wind pressure switch.