JPH0352864Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a toilet bowl cleaning device that supplies flushing water into the toilet bowl, and in particular, the supply of flushing water into the toilet bowl depending on the presence or absence of filth (feces) in the toilet bowl. The present invention relates to a toilet bowl cleaning device that can control the amount.

(Prior art and its problems) Conventionally, as a toilet bowl cleaning device that automatically cleans the inside of the toilet bowl by supplying flushing water into the bowl, for example,
There is a cleaning device as described in Japanese Patent No. 57-16214. In such conventional cleaning devices, a photoelectric reflection type photoelectric switch for detecting a human body is installed inside the toilet, and infrared rays emitted from the light emitting part of this photoelectric reflection type photoelectric switch are transmitted to the user of the toilet bowl in the toilet. When the user leaves the toilet or the toilet, the reflected light is received by the light-receiving unit, and when the user leaves the toilet, the control unit directs flushing water into the toilet via this photoelectric reflection type photoelectric switch. This type of system automatically flushed the inside of the toilet bowl by issuing a command signal.

In such a conventionally constructed toilet bowl cleaning device, flushing water is supplied into the toilet bowl under the same conditions when urinating in the toilet bowl and when defecating in the toilet bowl. In particular, in public toilets for women installed at stations, schools, department stores, etc., although the toilet bowl is often used for urinating, a large flow of flushing water for urination is not supplied into the toilet bowl. However, there was a problem in that the amount of washing water used increased and the cost of maintaining the toilet increased. In addition, in order to improve such problems, it is sufficient to install a water discharge switch for urinary washing and a water discharge switch for urinary washing, and install two systems of washing water discharging piping operated by these switches. However, it is impossible to save water by leaving the operation of these two water discharge switches to the user, and sometimes only the water discharge switch for urination is operated, or the water discharge switch for urination is not operated even though it has been used for defecating. There was a problem with the switch being manipulated.

(Means for Solving the Problems) The present invention was devised in view of the above-mentioned conventional problems, and includes a filth detection sensor that detects the presence or absence of filth (feces) in the toilet bowl. To provide a toilet bowl cleaning device that can detect the presence or absence of filth (feces) in the toilet bowl and automatically supply a large flow of flushing water into the toilet bowl only when filth (feces) is present in the toilet bowl. The purpose is to provide a filth detection sensor that detects the presence or absence of filth (feces) in the toilet bowl, a manually operated operation switch, a human body detection sensor that detects the use of the toilet bowl, and the filth detection sensor and operation. A control section that operates based on a detection signal from a switch and a human body detection sensor, and an electromagnetic water discharge valve that operates for a predetermined period of time in response to an output from the control section and controls the flow rate of flushing water to the toilet bowl, The control unit is configured to detect the presence of filth when either an operation detection signal from the device switch or a human body non-detection signal from the human body detection sensor is input in a state in which a filth presence detection signal is input from the filth detection sensor. The device is configured to output a drive signal to the water discharge valve to cause flushing water for feces to flow.

(Function) When the filth detection sensor detects the presence of filth in the toilet bowl, the filth detection sensor outputs a detection signal indicating the presence of filth to the control unit. When either the output signal from the operation switch or the human body non-detection signal from the human body detection sensor (detection signal indicating that the user has left the toilet) is input, the control unit causes the water discharge valve to flush the toilet. Since a driving signal for flushing water is output, a large flow of flushing water is supplied into the toilet bowl, and the filth in the toilet bowl is effectively cleaned. On the other hand, when the filth detection sensor does not detect any filth in the toilet bowl, it is determined that the toilet is being used for urination, and the system is controlled based on either the operation switch or the human body non-detection signal from the human body detection sensor. The toilet flushes the inside of the toilet bowl by flushing a small amount of flushing water into the toilet bowl. Therefore, the amount of flushing water supplied to the toilet bowl is differentiated between when the toilet bowl is used for defecating and when the toilet bowl is used for urinating, and it is possible to save water for flushing the toilet bowl. can.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a side sectional view of a Japanese-style toilet bowl installed in a toilet, and FIG. 2 is a control block diagram of a flushing device for supplying flushing water into the toilet bowl of FIG.

In the figure, a toilet bowl 1 installed buried in the floor F of a toilet has a bowl surface 1a that receives filth O inside, and a lower part of the bowl surface 1a has a siphon section that sucks out flush water. A water film W made of a small amount of water is normally formed on the upper surface of the pot surface 1a, and the filth O falls onto the pot surface 1a from above the water film W.

In this example, a storage chamber 1b having a considerable space on the back side of the pot surface 1a where the filth O falls is integrally formed of ceramic, and it is difficult to insert a hand into the storage chamber 1b. An opening K is formed, and a filth detection sensor 2 is installed in an adhesive manner on the back side of the pot surface 1a in the storage chamber 1b. The lead wire 2a of this dirt detection sensor 2 is connected to the opening K.
is wired to an external control device.

In this example, the dirt detection sensor 2 is a thermal type sensor (thermistor, thermocouple, resistance temperature detector,
(composed of heat-sensitive elements such as thermopiles)
It is composed of
When the toilet bowl 1 falls, the amount of heat of the waste O is sensed through the bowl surface 1a, and the presence or absence of the waste O in the toilet bowl 1 can also be sensed. That is, when the filth O falls onto the upper surface of the pot surface 1a, the filth O warms the pottery forming the pot surface 1a, and the filth detection sensor 2 detects the presence of the filth O based on the temperature change.

Next, referring to FIG. 2, a control device for supplying flush water for flushing into the toilet bowl 1 will be explained.

A latch circuit 5 is connected to the lead wire 2a of the filth detection sensor 2 via a wire a, and the latch circuit 5 has an input terminal to which the wire a is connected, an output terminal to which the wire b is connected, and a wire. The input signal from the input side is held on the output terminal b side until the release signal is input from the wiring i to the clear terminal. It continues to output an output signal based on the signal.

Wiring b is an AND gate A6 consisting of an AND element
The input terminal of the NOT circuit 9 is connected to the input terminal of the NOT circuit 9.

The operation switch 3 installed on the wall around the toilet bowl 1 in the toilet is a self-resetting push button switch, and is connected to an OR gate 22 and an AND gate B10, which are made up of AND elements, via a wire c. connected to each input terminal. A wiring j connected to the human body detection sensor 21 is connected to the other input terminal of the OR gate 22. This human body detection sensor 21 is composed of a reflective photoelectric switch, etc., and is equipped with a light emitting part and a light receiving part, and is installed on the wall around the toilet bowl 1 in the toilet or on the door of the toilet. The infrared rays are projected onto the user, and the light receiving section receives the reflected light, thereby sensing the usage status in the toilet.
When the user leaves the surrounding area or inside the toilet, an H level voltage can be output to the wiring j. A wiring k is connected to the output terminal of the OR gate 22, and this wiring k is connected to one input terminal of the AND gate A6. Further, the output terminal of the NOT circuit 9 is connected to one input terminal of the AND gate B10.

Further, a wiring d is connected to the output terminal of the AND gate A6, and this wiring d is connected to the single shot A6.
It is connected to the input terminal of 7. This single shot A7 is composed of an integrated circuit, a capacitor, a resistor, etc., and is capable of receiving an H level input signal from the wiring d and outputting a fairly long pulse signal to the output wiring e. It is something. That is, the output pulse time width is set in advance by the setting value of the capacitor or resistor in this single shot A7, and in this example, the pulse time width to be output is set in advance.
It is set so that a pulse signal having a time width that can supply enough washing water (washing water for feces) to wash away the filth O in the inside can be outputted to the output side wiring e.

The wiring e is further connected to the single shot C8 and the input terminal of the OR gate 12, and the single shot C8 is composed of an integrated circuit, a capacitor, etc., and is connected to the single shot A.
When a falling signal is received from 7, the output side wiring i
This output signal is input to the clear terminal of the latch circuit 5, and the latch circuit 5 can be returned to its initial state.

On the other hand, a wiring f is connected to the output terminal of the AND gate B10, and the wiring f is connected to the input terminal of the single shot B11. This single shot B11 is composed of an integrated circuit, a capacitor, a resistor, etc., and uses the capacitance of the capacitor etc. inside to send a relatively short pulse signal to the output wiring (g). It is possible to output pulses with a sufficient time width for This wiring g is connected to the input terminal of the OR gate 12.

In this example, the AND gate A6, the single shot A7, and the single shot C8 constitute the stool signal output section 4a, while the NOT circuit 9, the AND gate B10, and the single shot B11 constitute the stool signal output section 4a. Urination signal output section 4
b is configured.

A wire h is connected to the output terminal of the OR gate 12, and the wire h is connected to the input terminal of the transistor 13. A relay 14 is further connected to the transistor 13, and the relay 14 is installed in a circuit constituted by a power source 15 and an electromagnetic section 16a. Therefore, when the relay 14 is turned on, the power supply 15 and the electromagnetic part 16a are connected, the electromagnet of the electromagnetic part 16a is excited, and the starting rod of the electromagnetic valve 16 can be actuated, so that the electromagnetic valve 16 is activated by the electromagnetic part 16a. The structure is such that the water pipe P is opened during the excitation time and the water pipe P is in an open state, and flush water is supplied from the water source into the toilet bowl 1 via the water pipe P.

In such a structure, the dirt detection sensor 2
When it detects filth O in the toilet bowl 1, it outputs an H level signal to the wire a, and in response to this rising signal, the latch circuit 5 holds the wire b side at the H level. Therefore, one input terminal side of AND gate A6 becomes H level, and the input terminal side of NOT circuit 9 becomes H level. Therefore, NOT circuit 9
The output terminal side of becomes L level, AND gate B
One input terminal side of 10 is at L level.

In this state, when the user turns on the operating switch 3 on the toilet wall, the wiring c becomes H level, and one input terminal side of the OR gate 22 and one input terminal side of the AND gate B10 become H level. At this time, the output wiring k of the OR gate 22 is at H level, and both input terminals of AND gate A6 are at H level, so the output wiring d of AND gate A6 is at H level. In response to this rising signal, the single shot A7 outputs a preset long-width pulse signal to the wire e. Therefore, one input terminal side of the OR gate 12 becomes H level via the wiring e, the output side wiring h of the OR gate 12 becomes H level, turning on the transistor 13, and at the same time turning on the relay 14, which connects the power supply 15 and the electromagnetic section. 16a is connected, and in response to the pulse output from the single shot A7, the solenoid part 16a is activated during the pulse time, and the solenoid valve 1 is activated.
6 is opened and a single shot A is placed inside the toilet bowl 1.
The flushing water for the pulse time width of 7 is supplied to the toilet bowl 1.
The filth O inside is cleaned. Furthermore, since the pulse signal from single shot A7 is input to single shot C8 via wire e, single shot C8 receives the falling signal and outputs an L level signal to wire i on the output side. This L level output signal is input to the clear terminal of the latch circuit 5, and the latch circuit 5 is returned to its initial state. This completes the cleaning cycle for the filth O in the toilet bowl 1.

Further, in this example, since a human body detection sensor 21 is installed, when this human body detection sensor 21 detects that the user has left the toilet bowl 1 or the toilet, a signal is sent to the OR gate 2 via the wiring j.
One input terminal of the AND gate A6 becomes H level, the output side of the OR gate 22 becomes H level, one input terminal of the AND gate A6 becomes H level via the wiring k, and at this time, the other input terminal of the AND gate A6 becomes H level. Since the H level output signal from the filth detection sensor 2 is introduced into the terminal, both terminals become H level, and the output terminal of AND gate A6 becomes H level. Outputs a pulse signal for flushing and flushes toilet bowl 1.
The filth inside is cleaned.

In this way, even when the user forgets to press the operating switch 3 and leaves the toilet, the human body detection sensor 21 automatically cleans the waste O in the toilet bowl 1. That is, while the filth detection sensor 2 is outputting a signal indicating that the filth O has been detected, the single signal is activated either when the operation switch 3 is operated or when the human body detection sensor 21 detects the exit of the user. The yacht A7 is activated and flush water is supplied into the toilet bowl 1.

On the other hand, when the filth detection sensor 2 does not detect the filth O, the wiring a and the wiring b are at the L level, and one input terminal side of the AND gate B10 is at the H level via the NOT circuit 9, and this state When the operation switch 3 is turned on by the user, the other input terminal side of the AND gate B10 also goes to H level via the wiring c, so the AND gate B
Both input terminals of AND gate B10 become H level, and the output terminal of AND gate B10 becomes H level, and the wiring f
The single shot B11 receives the rising signal of the H level through the single shot B11, and outputs a short-time pulse signal to the output side. Therefore, one input terminal of the OR gate 12 becomes H level via the wiring g.
The output side wiring h of the OR gate 12 becomes H level, the transistor 13 is turned on, and the relay 14 is turned on.
When turned ON, the electromagnetic section 16a is connected. At this time, the electromagnetic section 16a is activated by the short pulse width for urination output by the single shot B11,
A small flow of flushing water will be supplied to the toilet bowl 1.

In this way, when the filth detection sensor 2 does not detect filth O in the toilet bowl 1, it determines that the toilet bowl 1 is used for urination, and the single shot B11
A small flow of flushing water is supplied into the toilet bowl 1 through the toilet bowl 1, thereby reducing the amount of flushing water used.

In this example, the single shot B11 for urine washing is operated based on the signal from the operation switch 3, but the urine signal output section 4b is also provided with an OR gate such as the OR gate 22. The system has a structure in which flushing water for urinary flushing is automatically supplied into the toilet bowl 1 even if the user forgets to press the operation switch 3 when the user leaves the toilet by receiving an output signal from the human body detection sensor 21. You can also.

As described above, according to the flushing water control system of this example, the flushing water for flushing feces is flushed only when filth O is present in the toilet bowl 1. Regardless of the classification, a large flow of flushing water is not flushed, which can be expected to save flushing water.Furthermore, when filth O is present in the toilet bowl 1, it can be flushed by operating the operating switch or automatically. The toilet can be cleaned well and the interior of the toilet can be kept extremely sanitary.

In this example, a thermal sensor is used as the filth detection sensor 2, but a capacitance sensor may be used as the filth detection sensor 2 instead of the thermal sensor. At that time, the capacitive sensor senses the capacitance of the filth O falling onto the top surface of the pot 1a, and it becomes possible to detect the presence or absence of the filth O as well as the amount of the filth O. When a capacitive sensor is used, the latch circuit 5 in the control circuit of FIG. 2 can be omitted. Further, instead of the capacitance type sensor, an impact sensor capable of detecting the presence of the filth O by detecting the impact when the filth O falls on the pot 1a can be used, and furthermore, it can be replaced with a microwave sensor. is also possible.

Further, in this example, a reflection type photoelectric switch is used as the human body detection sensor 21, but it can also be replaced with an ultrasonic type switch.

In this example, by installing the filth detection sensor 2 on the back side of the bowl surface 1a of the toilet bowl 1,
This dirt detection sensor 2 does not have water droplets or dirt attached to it, so it does not need to be constantly cleaned and can exhibit its detection ability well.
It also has the effect of easy maintenance.

(Effects of the invention) The toilet bowl cleaning device of the present invention includes a filth detection sensor that detects the presence or absence of filth (feces) in the toilet bowl, a manually operated operation switch, and a human body detection sensor that detects the use of the toilet bowl. a control unit that operates based on sensing signals from the filth detection sensor, the operation switch, and the human body detection sensor; and an electromagnetic water spout that operates for a predetermined period of time in response to an output from the control unit and controls the flow rate of flushing water to the toilet bowl. and a valve, and the control unit is configured to control whether either an operation detection signal from the device switch or a human body non-detection signal from the human body detection sensor is inputted from the dirt detection sensor. By configuring the system to output a drive signal that causes the toilet flushing water to flow to the water discharge valve when the input signal is input,
The toilet flush water is flushed only when filth is detected in the toilet bowl, which not only saves water for flushing, but also effectively removes the filth in the toilet bowl and maintains the toilet bowl in a sanitary condition. has.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Figure 1 is a side sectional view of a Japanese-style toilet installed in a toilet, and Figure 2 is a block diagram of the flushing device for supplying flushing water into the toilet bowl in Figure 1. It is a diagram. 1... Toilet bowl, 1a... Bowl surface, 1b... Storage room,
2... filth detection sensor, 3... operation switch,
4...Control unit, 4a...Stool signal output unit, 4b
...Urine signal output section, 5...Latch circuit, 6...
...AND gate A, 7...single shot A,
8...Single shot C, 9...NOT circuit,
10...AND gate B, 11...single shot B,...12, 22...OR gate, 13...
...transistor, 14...relay, 16...electromagnetic valve, 16a...electromagnetic section, 21...human body detection sensor.

Claims (1)

[Scope of utility model registration request] A filth detection sensor that detects the presence or absence of filth (feces) in the toilet bowl, a manually operated operation switch, a human body detection sensor that detects the use of the toilet bowl, and the sensing of the filth detection sensor, the operation switch, and the human body detection sensor. The controller includes a control unit that operates based on a signal, and an electromagnetic water discharge valve that operates for a predetermined period of time in response to an output from the control unit to control the flow rate of flushing water to the toilet bowl, and the control unit is configured to control the filth detection. Under the condition that the detection signal indicating the presence of filth is input from the sensor, when either the operation detection signal from the device switch or the human body non-detection signal from the human body detection sensor is input, the water discharge valve is A toilet bowl cleaning device characterized in that it is configured to output a drive signal to cause flushing water to flow.