JPH0768716B2 - Drainage system clogging detection method in automatic water washing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention is an automatic flushing device used for urinals, etc., and when clogging occurs in the drainage system, it is necessary to confirm this early. The present invention relates to a detection method capable of performing.

<Prior art> As is well known, since urinals in public toilets and inns are used by an unspecified number of people, the drainage system is apt to be clogged, and the manager constantly monitors this clogging. In addition to the fact that it is actually difficult, if a clogging that progresses slowly (a clogged state), it is difficult to make a judgment just by visually observing it, and in the end take measures to prevent the clogging. Without this, small water will overflow from the urinal etc. together with the cleaning water that is automatically supplied in a fixed amount, and the clogging will be dealt with for the first time, resulting in extremely unsanitary conditions. Not only that, but especially at inns and the like, it requires a great deal of labor and time to clean up afterwards, which causes trouble to the guests.

<Problems to be solved by the invention> In view of the above-mentioned conventional problems, the present invention provides an automatic flushing device such as a urinal in a proper position of the flusher such as the urinal, where the water level is derived from the water level detection sensor circuit unit. A detection sensor is installed in advance, and after a predetermined amount of cleaning water has been discharged into the water washer by the automatic water washing device at a suitable time, the water level detection sensor circuit section is cycled at a predetermined cycle when a predetermined delay time elapses. The operation of the water level detection sensor circuit is to be suppressed, and the power consumption of the attached water level detection sensor circuit is suppressed as much as possible to prolong the life of the power source such as the battery. From time to time, the retention time is measured until the water level detection sensor stops detecting the accumulated water in the water washer, and it is determined that this is longer than the normal retention time of the accumulated water, so that the clogging state is accurate. The purpose is to detect the occurrence of an overflow and prevent an overflow from occurring.

If the detection of clogging as described above is realized, the detection result is used to alert the occurrence of clogging with sound or light, and the automatic flushing device detects the toilet user. However, it is possible to stop the discharge of the cleaning water after the occurrence of the clogging is detected.

<< Means for Solving the Problems >> The present invention, in order to achieve the above object, emits human detection light from the light emitting element of the photoelectric sensor circuit unit that is activated at predetermined intervals by the electrical control circuit unit, After the human detection light is received by the human body near the water washing device and the reflected light is incident on the light receiving element of the photoelectric sensor circuit unit, the output from the photoelectric sensor circuit unit due to the disappearance of the incident electric It is input to the control circuit section, and the output from the electric control circuit section is operated to activate the valve drive circuit section to open the water washing valve for a predetermined time, whereby a predetermined amount of water is washed into the water washing device. In an automatic water washing device adapted to discharge water, after a predetermined delay time has elapsed from the completion of the discharge of the washing water, a water level detection sensor is provided on the bottom side where the drain port of the water washing device is opened. Done The water level detection sensor circuit unit is brought into operation by the electrical control circuit unit at predetermined intervals, and based on this, the water level detection sensor causes the water level detection sensor to accumulate in the water washer from the start of operation. The retention time until water is no longer detected is measured by the electrical control circuit section, and the size of the measurement time and the normal retention time is determined, and the drainage system eye in the automatic water washing device is characterized. It is intended to provide a clogging detection method.

<Operation> As is known, a urinal and the like by automatic flushing has a photoelectric sensor circuit section to which power is supplied by an electrical control circuit section at a predetermined cycle such as one second. It is equipped with a light emitting element that emits human detection light such as infrared rays and a light receiving element that receives the reflected light from the human body that received the light from this light emitting element. When the stool is in a state of not detecting a person leaving, the output from the photoelectric sensor circuit unit is input to the electric control circuit unit, which causes the electric control circuit unit to operate the valve drive circuit unit. Since the flushing valve is opened for a predetermined period of time, tap water or other washing water is discharged from the discharge port of the urinal in a predetermined amount, and the cleaning water is discharged from the drain port of the urinal for a predetermined time ( Normal residence time)
It will be drained later.

Therefore, in the automatic flushing apparatus as described above, in the present invention, not immediately after the completion of discharge of the flushing water,
After the elapse of a predetermined delay time, for the water level detection sensor circuit section,
The electric control circuit section supplies electric power at a predetermined cycle such as 1 second, whereby the electric control circuit section starts the operation of the water level detection sensor circuit section as described above and then the water level. The sensor for detecting the water level in the detection sensor circuit section measures the staying time until it no longer detects the accumulated water in the urinal, etc., and determines whether the measured time is longer than the normal staying time. Becomes

If the above determination result indicates that the measurement time is longer than the normal residence time, based on this, an alarm is issued by sound or light, or even if the photoelectric sensor circuit unit detects a person, the cleaning water from the spout is no longer Appropriate measures can be taken, such as preventing discharge.

WORKING EXAMPLE The present invention will be described in detail with reference to the drawings. FIG. 1 relates to an automatic flushing device in the case of a urinal capable of carrying out the detection method according to the present invention. 1, a photoelectric sensor circuit portion 2 having a light emitting element 2a and a light receiving element 2b, an electrical control circuit portion 3 connected to the photoelectric sensor circuit portion 2, and a valve drive circuit portion 4 with a flush valve 4a for receiving the output thereof.
And are attached.

Further, the water level detection sensor circuit unit 5 connected to the electric control circuit unit 3 for implementing the present invention has water level detection sensors 5a and 5b, which are internally provided on the bottom 1a side of the water washing device 1. In the figure, 1b is a drain of the flushing device 1 and 4b is a flush valve.
A discharge port 4a and a cleaning water W introduction pipe 4c are shown.

Therefore, first, the method of automatic water washing by the automatic water washing device is known, and as clearly shown in FIG. 3, electric power is constantly applied to the photoelectric sensor circuit portion 2 from the electric control circuit portion 3. Instead, power is supplied at a predetermined cycle such as every second, and therefore, the light emitting element of the photoelectric sensor circuit unit 2 concerned.
2a will generate intermittent light due to the emission output wave P _{1 as} shown in FIG.

This is because the life of the power source such as a battery is made to be as long as possible, and as a result, the light emitting element 2a is concerned.
If a human body M such as a toilet person stands near the user, human detection light l ₁ by infrared rays or the like from the light emitting element 2a is reflected by the human body and the reflected light l ₂ is incident on the light receiving element 2b. Thus, a person will intermittently generate the received light output wave P ₂ as shown in FIG. 7B at the above-mentioned predetermined period during the urination.

FIG. 3C is a waveform diagram showing the presence or absence of the human body M. The output of the electric control circuit unit 3 is input to the valve drive circuit unit 4 after a desired time t has passed after the human body M has left. Then, the water washing valve 4a is opened, and the washing water W is discharged into the water washing device 1 from the discharge port 4b through the introduction pipe 4c. At this time, the water washing valve 4a is shown in FIG. since) is only open a predetermined time T ₀ as the discharge amount of cleaning water W for washing apparatus 1 is constant.

Now, even in the present invention, the above-mentioned washing method is exactly the same, and up to (a), (b), (c) and (d) in FIG. 2, (a) and (b) in FIG. (C) It is exactly the same as (d).

In the method according to the present invention, not immediately after the cleaning water W is discharged for the predetermined time T ₀ as described above,
As shown in FIG. 2 (e), after the elapse of a predetermined delay time T ₁ , the water level detection sensor circuit section 5 is operated by the electrical control circuit section 3 and also at an arbitrary predetermined cycle. The power supply such as the input wave P ₃ is supplied and the operation is intermittently performed.

As a result, from the water level detection sensor circuit unit 5, as shown in FIG. 2 (f), the measurement pulse P ₄ having the same cycle as P ₃ is obtained.
Will be input to the electrical control circuit unit 3.

Here, the discharged cleaning water W is the bottom portion of the water washing device 1.
As long as the wastewater from the drainage outlet 1b and below is not clogged, the cleaning water with a constant discharge amount drops below the water level provided with the water level detection sensors 5a and 5b within the normal retention time. contrast to the results, if now Wakashi clogging has occurred, despite the passage of only the normal residence time, the water level sensor 5a, 5b are that still detecting the accumulated water W ₂ Become.

Therefore, in the present invention, the above-mentioned measurement pulse P
By the counting of the electric control circuit 3 of ₄ , the water level detection sensors 5a, 5
b, together with measuring the residence time until no sense the accumulated water W ₁ in the washing apparatus 1 is to determine whether the measured time has become larger than the normal residence time.

That is, if the measured time is longer than the predicted normal residence time, the occurrence of clogging can be detected.

Therefore, in the case of an actual urinal, etc., based on the result of the above determination, the electric control circuit unit 3 can issue an alarm by sound, light, etc. to notify the manager of the occurrence of clogging. The measurement time is
When the photoelectric control circuit unit 2 detects the human body M by the electric control circuit unit 3 when the time exceeds a predetermined time, the valve drive circuit unit 4 does not operate thereafter, and thus the washing device 1 is washed. It is also possible to prevent the water W from being supplied.

<Effects of the Invention> Since the present invention can be carried out as described above, power supply to the water level detection sensor circuit unit is also made to be sent for a predetermined delay time after completion of discharge of cleaning water to the water washer. So it doesn't consume much power.

In addition, the water level detection sensor circuit part is installed in the water washing device so that the electric control circuit part keeps the water level below the water level detection sensor's water level within the normal retention time when there is no accumulated water in the water washing device. Since it is determined whether or not it has decreased, it is possible to reliably detect clogging of the drainage system that cannot be visually confirmed with the required accuracy.
It is possible to prevent overflow caused by clogging of a urinal or the like.

[Brief description of drawings]

FIG. 1 is an overall configuration explanatory view showing an automatic flushing device of a urinal that can be used for carrying out the drainage system clogging detection method in the automatic flushing device according to the present invention, and FIGS. 2 (a) to 2 (f) are FIG. 3A to FIG. 3C are waveform charts showing changes over time in the movable or nonexistent state of each part of FIG. 1 when the method is performed.
(D) is a waveform diagram showing the change over time in the movable or nonexistent state in each part of FIG. 1 ... Washer 1a ... Bottom 1b ... Drainage port 2 ... Photoelectric sensor circuit 2a ... Light emitting element 2b ... Light receiving element 3 ... Electrical control circuit 4 ... Valve drive circuit 4a ... Washing Valve 5 …… Water level detection sensor circuit 5a, 5b …… Water level detection sensor l ₁ …… Person detection light l ₂ …… Reflected light M …… Human body T ₀ …… Predetermined time T ₁ …… Delay time W …… Washing water W ₁ ……

Claims (1)

[Claims] 1. An electric control circuit section emits human detection light from a light emitting element of a photoelectric sensor circuit section that is activated at predetermined intervals, and the human detection light is received by a human body in the vicinity of the water washing device and reflected by the human body. After the light is incident on the light receiving element of the photoelectric sensor circuit unit, the output from the photoelectric sensor circuit unit due to the disappearance of the incident is input to the electrical control circuit unit, and the electrical control circuit unit is thereby produced. From the output from, by operating the valve drive circuit unit, the valve for washing is opened for a predetermined period of time, thereby discharging a predetermined amount of washing water into the washing device, in the automatic washing device, After the elapse of a predetermined delay time from the completion of the discharge of the cleaning water, the water level detection sensor circuit part provided on the bottom side where the drain port of the water washing device is opened is provided with the electrical control circuit. Department Therefore, it is not activated every predetermined period, and based on this, the electrical control of the retention time from the start of the operation of the water level detection sensor circuit section until the water level detection sensor stops detecting the accumulated water in the water washer A method for detecting a clogging of a drainage system in an automatic water washing device, characterized in that the size of the measurement time and the normal residence time is determined while being measured by a circuit unit.