JPH0360980B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a urinal that automatically performs preliminary cleaning and main cleaning, and the human body continuously detects whether or not the user is a true user of the urinal. Automatic urinal flushing that reduces the total amount of flushing water used by determining the time when a human body is detected and changing the main flushing time depending on the time when a human body is detected. It is related to the device.

[Conventional technology]

Conventionally, automatic urinal cleaning methods include a method that periodically discharges flushing water, and a method that detects when a user approaches or leaves the urinal using a light detection sensor, etc. There is a method in which washing water is supplied during or after use. In addition, in the case of a system in which the supply of flush water is controlled by detecting the human body using the light detection sensor, etc., before the user starts urinating, the inside of the toilet bowl is moistened, a so-called preliminary flush. In most cases, the main cleaning is performed afterwards. Preliminary cleaning involves moistening the inner surface of the toilet bowl before urinating to form a water film on the inner surface of the bowl.
This water film prevents stain-causing components such as ammonia and protein contained in urine from directly sticking to the inner surface of the toilet bowl.

[Problem that the invention seeks to solve]

By the way, the method of discharging cleaning water periodically does not match the actual usage conditions.
If the urinal is used frequently, the amount of water used for flushing may be insufficient, resulting in odor or buildup of dirt.If the urinal is used infrequently, a large amount of water may be wasted. There was a drawback.

On the other hand, in the case of a system that detects a human body and controls the supply of washing water, the washing water discharge time (as a result, the amount of washing water) is set to be different for preliminary washing and main washing. . The purpose of pre-washing is to create a water film on the inner surface of the toilet bowl before urinating, and the water is discharged for a short period of time. On the other hand, in the main cleaning, after cleaning the inner surface of the toilet bowl, the urine in the water-sealing trap must be replaced with cleaning water, and the discharge time is set to be quite long. By the way, in the conventional method of supplying washing water by human body detection, depending on the rising signal of the human body detected signal,
Preliminary cleaning is started for a predetermined period of time, and main cleaning is performed for a predetermined period of time in response to a fall signal of the human body detection signal. For this reason, even if the person cleaning the urinal simply passes through the urinal, that is, even if the user is not a real urinal user, the preliminary cleaning and main cleaning are always performed, reducing the amount of wasted cleaning water used. The drawback is that there are too many.

[Purpose of the invention]

The present invention improves and eliminates the above-mentioned conventional problems, and determines whether or not a person is a true urinal user based on the time period during which the human body is continuously detected. However, the present invention aims to provide an automatic cleaning device in which the total amount of cleaning water used can be reduced by changing the main cleaning time.

[Means for solving problems]

The gist of the present invention for solving the above problems is as follows:
A human body detector such as an infrared sensor that detects a human body; a pre-cleaning circuit that generates a single shot pulse for a predetermined period of time in response to a rising signal of the output of the human body detector; It consists of a main washing circuit that generates a single shot pulse for a certain amount of time, and a relay circuit that opens and closes the water supply valve of the urinal according to the pulse signals of the preliminary washing circuit and the main washing circuit, and the main washing circuit outputs an output from the preliminary washing circuit. This automatic urinal cleaning device is characterized by having a time setting circuit such as a CR timer whose time constant changes depending on the presence or absence of a pulse signal.

[Effect]

As is clear from the embodiments shown in FIGS. 1 to 6, the pre-cleaning circuit 4 uses the rising signal b of the human body detection signal a.
For example, a single shot pulse e of 3 seconds is generated, and the relay 13 is operated to open the water supply valve 15 for the time period during which the pulse e is being generated, thereby performing preliminary cleaning. On the other hand, the main cleaning circuit 5 generates a single shot pulse h for a predetermined time based on the falling signal f of the human body detection signal a, and performs the main cleaning in the same manner as in the preliminary cleaning. However, the output of this single shot pulse h depends on whether or not the fall signal f of the human body detection signal a is output while the single shot pulse e for pre-cleaning is being output. The times are set differently. That is, if the falling signal f of the human body detection signal a is output while the pulse e is being output, the second
As shown in the figure, a capacitor C is charged by two circuits passing through resistors R ₁ and R ₂ respectively. Also, after preliminary cleaning, the human body detection signal a
When a falling signal f is output, the capacitor C is charged by one circuit passing only through _R1 . When the charging voltage of capacitor C reaches a predetermined voltage, flip-flop circuit 2
The output of No. 6 becomes "H" level, and the single shot pulse h is no longer output. In short, depending on whether the fall signal f of the human body detection signal a is output during pre-flushing or after it is completed, it is possible to simulate whether or not the urinal is actually being used. The main cleaning time is automatically changed within the range from 0 to an arbitrarily set time.

〔Example〕

The configuration of the present invention will be explained below based on the embodiments shown in the drawings.

FIG. 1 is a block diagram of an automatic urinal cleaning device 1 showing a first embodiment of the present invention. As shown in the figure, this device 1 includes a power supply circuit 2, a human body detector 3,
It is composed of a preliminary cleaning circuit 4, a main cleaning circuit 5, and a relay circuit 6.

The pre-cleaning circuit 4 includes a trigger generator 7 that generates a trigger pulse d in response to a rising signal b of a human body detection signal a output from the human body detector 3, and a trigger pulse d that generates a single shot pulse e of, for example, 3 seconds. A pulse generator 8 that generates a pulse generator is connected in series. The main cleaning circuit 5 also includes a trigger generator 9 that generates a trigger pulse g based on the falling signal f of the human body detection signal a output from the human body detector 3, and a trigger generator 9 that generates a single shot pulse h using the trigger pulse g. Pulse generator 10 that generates
are connected in series. This pulse generator 10 is connected to a time setting circuit 11 that changes the saturation charging time in response to the charging current from the pulse generator 8, and the pulse h generated by the pulse generator 10 is The signal is output only during the time set by the time setting circuit 11.

The specific circuit configurations of the pulse generators 8 and 10 and the time setting circuit 11 are as shown in FIG. The pulse generator 8 has comparators 17 and 1
8 has a flip-flop circuit 19 whose output side is connected to the reset terminal R and the set terminal S, and the output side of the circuit 19 is connected to the reset terminal R and the set terminal S.
It is connected to the OR element 12. Further, the output of the flip-flop circuit 19 is connected to the base side of a transistor 21, and the collector side of the transistor 21 is connected to a resistor _R2 . Furthermore, the midpoint between resistor R ₂ and the collector is connected to diode 29.
is connected to the intermediate connection point 22 of the pulse generator 10 via. The negative side of the comparator 17 is
It is connected to a constant voltage circuit divided by three resistors, and the positive side is connected to a CR timer circuit consisting of resistor _R3 and capacitor _C1 . The intermediate connection point between R ₃ and C ₁ is a diode 23.
and the inverting output circuit 20 and the OR element 1 via the resistor R ₄
It is connected to the midpoint between 2 and 2. On the other hand, comparator 1
The negative side of 8 is connected to the output side of the trigger generator 7, and the positive side is connected to a constant voltage circuit divided by three resistors.

The configuration of the pulse generator 10 of the cleaning circuit 5 is almost the same as that of the pulse generator 8, and includes a flip-flop circuit 26 which uses the outputs of the two comparators 24 and 25 as a reset terminal R and a set terminal S, respectively. The output side is an inverting output circuit 27
It is connected to the OR element 12 via. Further, the output side of the flip-flop circuit 26 is connected to the base side of a transistor 28. The collector side of the transistor 28 is connected to the intermediate connection point 22. Furthermore, this intermediate connection point 22 is an intermediate connection point between R1 of the time setting circuit ₁₁ and the capacitor C,
They are respectively connected to the positive terminals of the comparator 24. The negative terminal of the comparator 24 is connected to a constant voltage circuit divided by three resistors. Further, the negative terminal of the comparator 25 is connected to the output side of the trigger generator 9, and the positive terminal is connected to a constant voltage circuit divided by the three resistors. As is clear from the above, the time setting circuit 11 made up of R ₁ and R ₂ and the capacitor C is a CR timer circuit as shown in the equivalent circuit of FIG. In the circuit diagram of FIG. 2, only _R1 is made a variable resistor, but it is also possible to make _R2 a variable resistor so that the time constants of each can be changed arbitrarily.

The relay circuit 6 includes an OR element 12 whose input terminals are the output side of the pulse generator 8 of the preliminary cleaning circuit 4 and the output side of the pulse generator 10 of the main cleaning circuit 5.
and a water supply valve 15 installed in the flushing passage 16 of the urinal via a relay 13 and a solenoid 14.
It is designed to control opening and closing.

Next, the operation mode of the automatic cleaning device 1 of the first embodiment configured as described above will be explained.

First, the user must be in front of the urinal for more than 3 seconds,
A case where the human body detection signal a of the human body detector 3 continues for 3 seconds or more will be explained with reference to the time chart of FIG. In this case, first, the trigger generator 7 generates a trigger pulse d by the rising signal b of the human body detection signal a.
occurs. When this trigger signal d is input, the negative potential of the comparator 18 becomes lower than the positive potential, and the comparator 18 outputs an "H" level (outputs a set signal), so that the flip-flop circuit 19 It becomes an "L" level output and generates a single shot pulse e. For this reason,
The relay 13 is turned on via the OR element 12 and outputs a signal j, which excites the solenoid 14 and opens the water supply valve 15. That is, the pre-cleaning circuit 4
Preliminary cleaning is started, and a water film is formed on the inner surface of the urinal bowl. As mentioned above, by forming a water film on the inner surface of the toilet bowl before urinating, this prevents components that cause stains contained in urine, such as ammonia and protein, from directly adhering to the inner surface of the toilet bowl. This is to prevent this.

By the way, when the flip-flop circuit 19 outputs an "L" level, the capacitor C ₁
A charge begins to accumulate due to the current passing through resistor _R3 . When the potential of the capacitor _C1 becomes higher than the negative potential of the comparator 17, the comparator 17 outputs an "H" level (outputs a reset signal). Therefore, the flip-flop circuit 19
outputs an inverted signal and becomes an "H" level output (single shot pulse e is no longer output). In this case, the potential of the capacitor _C1 is
The time for the potential to become higher than the negative side potential of is set to 3 seconds, and therefore, the pre-cleaning is performed for only 3 seconds.

Therefore, the inverting output circuit 2 of this pulse generator 8
During the 3 seconds during which the single shot pulse e is output from 0, the base voltage of the transistor 21 of the pulse generator 8 is low, and the transistor 21 is
Since the ON operation is not performed, the current flowing through the resistor R ₂ flows toward the intermediate connection point 22 of the pulse generator 10 . However, in this case, the output side of the flip-flop circuit 26 is at the "H" level and the transistor 28 is turned on, so that the current passing through _R2 and the current passing through _R1 are all transferred from the collector of the transistor 28. The charge flows to the emitter, and no charge is accumulated in the capacitor C of the time setting circuit 11.

When the user leaves the urinal three seconds after urination is finished and the human body detection signal a is output, the human body detector 3 detects this and the human body detection signal a is no longer output. For this reason, the main cleaning circuit 5
The trigger signal g is output from the trigger generator 9 in response to the falling signal f of the human body detection signal a.
This trigger signal g is input to the negative side of the comparator 25, and is lower than the constant voltage on the positive side, so the comparator 25 outputs an "H" level,
This sets the flip-flop circuit 26. The flip-flop circuit 26 outputs an "L" level in response to the set signal. That is, a single shot pulse h is outputted and the main cleaning is started.

When this single shot pulse h is output, the transistor 28 turns OFF, and the resistor R ₁
Charge begins to accumulate in capacitor C through
In this case, since the single shot pulse output from the flip-flop circuit 19 of the pre-cleaning circuit 4 is at the "H" level, the transistor 21 of the pulse generator 8 is in an ON operation. Therefore, the current flowing through the resistor _R2 will flow from the collector to the emitter of the transistor 21, and no charging current will flow through the resistor _R2 to the capacitor C. Therefore, capacitor C is
As shown in the equivalent circuit of FIG. 4, it is charged only by the current passing through resistor _R1 . The time _t1 until this charged potential reaches a predetermined voltage (the negative potential of the comparator 24 divided by three resistors) is 10 seconds as shown in FIG. This can be changed freely by changing the time constant by changing the value of the resistor _R1 .

When 10 seconds have passed since the falling signal f of the human body detection signal a was output, the charge accumulated in the capacitor C, that is, the positive potential of the comparator 24 becomes larger than the negative potential, and the comparator 24 Outputs “H” level (outputs reset signal).
Therefore, the output of the flip-flop circuit 26 is inverted and becomes an "H" level output. in short,
After the falling signal f of the human body detection signal a is output
After 10 seconds have elapsed, the single shot pulse h is no longer output, and the main cleaning ends.

Next, the case of a mere passerby, for example, the case where the output signal a of the human body detector 3 is continuously output for only 2 seconds, will be explained with reference to the block diagram of FIG. 1 and the time chart of FIG. 6. . In this case, in the pre-cleaning circuit 4, as in the above case,
A single shot pulse e is output for only 3 seconds, and pre-cleaning is performed for only 3 seconds. Then,
In the cleaning circuit 5, the falling signal f of the human body detection signal a is output while the single shot pulse e is being output. In response to the falling signal f, the comparator 25 outputs an "H" level, and the flip-flop circuit 26 outputs an "L" level. That is, a single shot pulse h is output, and main cleaning and preliminary cleaning signals e and h are output simultaneously. Here, the water supply valve 15 of the urinal is opened and closed by either the signal e or h, and even if both are output at the same time, the discharge flow rate of flush water is constant.

By the way, in this case, the preliminary cleaning circuit 4
The transistor 21 and the transistor 28 of the main cleaning circuit 5 are both OFF. Therefore, a charging current flows to the capacitor C through the resistors _R1 and _R2 . The time constant in this case is extremely short,
As shown in FIG. 5, the time t ₂ until the charge accumulated in the capacitor C becomes higher than the negative potential of the comparator 24 is only 1 second. Therefore, the comparator 24 outputs the reset signal 1 second after the falling signal f of the human body detection signal a is output, that is, 3 seconds after the rising signal b of the human body detection signal a is output. However, the flip-flop circuit 26 outputs an "H" level. In other words, the single shot pulse h for performing main cleaning is no longer output. In the end, while the preliminary cleaning is being performed by the preliminary cleaning circuit 4, the main cleaning ends at the same time, and as a result, the main cleaning is not performed. In short, if the human body detector 3 continuously outputs the human body detection signal a for 2 seconds (the same applies if it is less than 2 seconds), and it is determined that the person is simply passing through, the urinal Washing is performed for only 3 seconds as a preliminary wash, and by eliminating the main wash that follows, the total amount of washing water is reduced.

Note that when the human body detection signal a continues for 2 seconds and is output for a time x within 3 seconds, the capacitor C has a resistor for only the time (3 seconds - x). Charging is performed by the current passing through R ₁ and resistor R ₂ , and after 3 seconds, charging is performed only by the current passing through resistor R ₁ . Therefore, in the case of this time x, after the preliminary cleaning for 3 seconds is performed, the main cleaning is performed only until the potential of the capacitor C reaches the predetermined potential. Of course, even in this case, the main cleaning time is shorter than in the past, and the effect of significantly reducing the discharge flow rate of cleaning water is great. The time during which this main cleaning is performed can be arbitrarily determined by changing the resistance value of _R1 .

FIG. 7 is a block diagram showing the entire automatic cleaning device 31 according to a second embodiment of the present invention. This automatic cleaning device 31 has a pre-cleaning circuit 34 formed by an AND element 32 whose input terminals are the output of the pulse generator 8 of the device of the first embodiment and the output of the human body detector 3. There is. In this case, the preliminary cleaning is performed only when the human body detection signal a and the single shot pulse e of the flip-flop circuit 19 (see FIG. 2) are output, and the user If the user leaves the urinal within seconds, the preliminary flushing will be completed within the time it takes to leave the urinal. Regarding the operation mode of main cleaning, please refer to the above-mentioned
This is basically the same as in the embodiment. Therefore,
In the case of this second embodiment, it is possible to reduce wasteful discharge of washing water in each of the preliminary washing and the main washing.

By the way, the present invention is not limited to the above-described embodiments, and can be modified as appropriate. for example,
All of the resistors R ₁ to R ₃ may be variable resistors, and the time constants of the capacitors C and C ₁ may be freely changed.

〔Effect of the invention〕

As explained above, in the present invention, in the case of a person who is not a true urinal user and is merely a passer-by such as a cleaner, the main washing may not be performed at all or the main washing time may be very short. This makes it possible to reduce the total amount of washing water used.

[Brief explanation of drawings]

Figures 1 to 6 relate to an automatic cleaning device according to a first embodiment of the present invention, with Figure 1 being a block diagram showing the entire system, and Figure 2 showing pulse generation in the preliminary cleaning circuit and the main cleaning circuit. The specific circuit diagram of the device, Figure 3 is a time chart of each signal when the human body detection signal is continuously output for 3 seconds or more, Figure 4 is an equivalent circuit diagram of the time setting circuit, and Figure 5 is a time chart of each signal. FIG. 6 is a characteristic diagram showing the charging time of the time setting circuit. FIG. 6 is a time chart of each signal when the human body detection signal is continuously output for less than 2 seconds. FIG. FIG. 1 is a block diagram showing the entire automatic cleaning device. 1...Automatic cleaning device, 3...Human body detector, a...
...Human body detection signal, b...Rise signal, e...Single shot pulse, 4...Preliminary cleaning circuit, f...
...Falling signal, h...Single shot pulse,
5... Main cleaning circuit, 15... Water supply valve, 6... Relay circuit, 11... Time setting circuit.

Claims (1)

[Scope of Claims] 1. A human body detector such as an infrared sensor that detects a human body, a pre-cleaning circuit that generates a single shot pulse for a predetermined period of time based on a rising signal of the output of the human body detector, and The main washing circuit consists of a main washing circuit that generates a single shot pulse for a predetermined period of time in response to an output falling signal, and a relay circuit that opens and closes the water supply valve of the urinal according to the pulse signals of the preliminary washing circuit and the main washing circuit. An automatic urinal cleaning device characterized in that the circuit has a time setting circuit such as a CR timer whose time constant changes depending on the presence or absence of a pulse signal output from a pre-cleaning circuit. 2. Input the output signal from the human body detector and the single shot pulse signal that is output for a predetermined time depending on the rising signal of the signal, and turn on the relay circuit only when both the above signals are at "H" level. 2. The automatic urinal cleaning device according to claim 1, wherein said preliminary cleaning circuit is formed by an operated AND element.