JPS60142131A - Ventilating device of lavatory - Google Patents

Abstract

PURPOSE:To ventilate the inside of lavatory by a method wherein a seating detector, detecting the seating on a toilet seat, a ventilating fan and a ventilating fan controlling means are provided to drive the ventilating fan upon the seating of man on the voilet seat and the fan is continued to be driven for a predetermined period of time after using the lavatory. CONSTITUTION:When a man is not seating on a toilet seat 3, a relay 20 is put OFF by an output terminal voltage (H) and a fan 4 is stopped. When the man has seated thereon, a detector 13 is closed to charge a capacitor 15, an input terminal voltage of a comparator 17 becomes V1>V2, the output terminal voltage becomes (L), a ventilating fan control relay 20 is put ON and the fan 4 is operated. When the man separates from the toilet seat 3, a seating switch 13 is opened and electric discharge of a capacitor 15 is started through a resistor 16, then, the input terminal voltage of the comparator 17 becomes V1>V2 after the predetermined period of time has elapsed and the output terminal voltage of the comparator 17 becomes (H) thereby stopping the ventilating fan 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a toilet ventilation system that drives a ventilation fan in conjunction with a toilet seat installed in a toilet room.

Conventional configuration and its problems A conventional general ventilation system for a toilet room will be described below. FIG. 1 is a perspective view of a conventional general toilet room ventilation configuration.

1 is the toilet room, 2 is the toilet bowl, 3 is the toilet seat installed on the toilet bowl 2, 4 is the ventilation fan that ventilates the toilet room, 5 is the lighting device in the toilet room, 6 is the lighting installed near the entrance of the toilet room It is a flashing switch on the device. A ventilation fan is often installed in the toilet room to remove indoor odors.The ventilation fan is driven by the commercial power supply in conjunction with the flashing switch 6 of the illuminator 5, as shown in the electric circuit shown in Figure 2, for example. 7 to the ventilation fan 4, or a configuration in which the ventilation fan 4 is driven independently.

However, in the conventional configuration described in Section 2, when you leave the room after using the toilet, you turn off the flashing switch 6 of the illuminator 5, and the ventilation fan 4 also stops, so the toilet room is not sufficiently ventilated and the odor remains and becomes unpleasant. Become. In addition, a system in which the ventilation fan 4 is operated independently is not convenient to use, and if it is operated continuously, there are problems in terms of noise and energy saving.

OBJECTS OF THE INVENTION The present invention solves the two conventional problems and provides a toilet ventilation system that can efficiently exhaust odor from the toilet room.

Structure of the Invention The present invention includes a seating detector for detecting sitting on a toilet seat, a ventilation fan, and a ventilation fan control means, and when the toilet is used, the ventilation fan is driven by sitting on the toilet seat, and the ventilation fan is driven for a certain period of time after use. This allows ventilation in the toilet room.

Description of examples An embodiment of the present invention will be described below based on FIG.

FIG. 3 shows an electrical circuit of a toilet ventilation system according to an embodiment of the present invention. In FIG. 3, reference numeral 8 denotes a control power supply section composed of a resistor 9, a resistor 10, a capacitor 11, and a constant voltage diode 12 from a commercial power source 7, and 13 denotes a seating detector for detecting seating on the toilet seat 3. A seat switch (not shown) that is activated by gravity when sitting on the toilet seat and closes when the toilet seat is seated. A series circuit of the seating switch 13, resistor 14, and capacitor 15 is connected to the control power source. 1
A discharge resistor 6 is connected to both ends of the capacitor 15.

The terminal voltage v1 of the capacitor 15 is input to the inverting input terminal of the comparator 17, and the voltage v2 obtained by dividing the control power source by the resistors 18 and 19 is input to the non-inverting input terminal. 20 is a ventilation fan control relay connected to the output terminal of the comparator 17;
21 is a surge absorbing diode. Reference numeral 23 denotes a ventilation fan control unit that supplies the commercial power source 7 to the ventilation fan 4 via the contact output 22 of the ventilation fan control relay 20 .

24 is a ventilation fan connection outlet, and 25 is a power plug for the ventilation fan 4. Figure 4 shows an external view of this device.

The operation of the toilet ventilation system of this embodiment constructed as described above will be explained below with reference to FIG. 5.

In FIG. 5, the horizontal axis represents time, and the vertical axis represents voltage waveform. At time t□, the user is not sitting on the toilet seat 3, and the input terminal voltage of the comparator 17 is Vl (voltage V2 is applied. At this time, the output terminal voltage of the comparator 17 is in the state of l"1-ij. ,
In other words, the ventilation fan control relay 20 is turned off and the ventilation fan 4 is turned off.
has stopped. Next, when the user sits on the toilet seat 3 at time t1, the seating detector 13 closes, and the capacitor 15 is charged via the resistor 14, reaching the voltage v2 at time t2. At this time, the period from time t1 to time t12 is an extremely short time. This is because the resistor 14 is a protective resistor for limiting the current of the M detector 13, so the time constant is small. When the input terminal voltage of the comparator 17 becomes Vl>V2, the output terminal voltage of the comparator 17 becomes l-
Lj, and the ventilation fan control relay 20 is turned on. Therefore, the ventilation fan 4 is operated.

Next, when you leave the toilet seat 3 at time t3, the seat switch 13
will be developed. From this time, the capacitor 15 starts discharging via the resistor 16, and at time t4, the input terminal voltage of the comparator 17 becomes Vl<V2 again, and the output terminal voltage of the comparator 17 becomes 1-H. Then, the ventilation fan 4 stops. Therefore, the period from time t3 to t4 is the delay time for ventilation fan operation. This time can be arbitrarily determined by the time constants of the capacitor 15 and resistor 16.

As described above, according to this embodiment, the ventilation fan control unit 23
An electric circuit including the above is built into the fixed part of the toilet seat 3 body, and a ventilation fan connection outlet 24 is provided, so that it can be easily connected to an existing ventilation fan.

Note that in this embodiment, the seating detector is constructed using a heavy metal insert, but the seating detector may also use an optical element, a magnetic element, an ultrasonic wave, or the like. In this case, the ventilation fan can be operated by simply approaching the toilet without sitting on the toilet seat.

Effects of the Invention As described above, the present invention includes a toilet seat installed on a toilet bowl, a ventilation fan that ventilates the inside of the toilet, a seating detector that detects seating on the toilet seat, and a system that delays the operation of the ventilation fan for a predetermined period of time. By providing a ventilation fan control means that stops the ventilation fan, the ventilation fan can be driven when the toilet is in use, resulting in energy savings. Furthermore, by performing the ventilation operation for a predetermined period of time even when leaving the toilet, it is possible to obtain the effect of preventing odor from remaining in the toilet room.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional toilet ventilation system, the second cause is an electric circuit diagram of the system, Figure 31 is a ventilation fan control circuit diagram in an embodiment of the present invention, and Figure 4 is a perspective view of the same system; FIG. 5 is a control timing diagram of the device. 2... Toilet bowl, 3... Toilet seat, 4...
Ventilation fan, 13... Seating detector, 23...
Ventilation fan control means. Name of agent: Patent attorney Toshi Nakao, 18 younger brother
3 Figure 1 Figure 2 - Figure 4

Claims (1)

[Scope of Claims] A toilet bowl, a toilet seat installed on the toilet bowl, a ventilation fan that ventilates the interior of the toilet room, a seating detector that detects seating on the toilet seat, and an output of the seating detector. A toilet ventilation system comprising a ventilation fan control means that drives a ventilation fan and stops the ventilation fan after a predetermined time delay when the user leaves the seat.