JP2747940B2 - Automatic cleaning device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic cleaning device.

(Prior art) Conventional automatic cleaning devices, for example, automatic toilet cleaning devices,
Generally, it is configured to include a human body detector that detects the presence of a human body and the like, and a water supply valve for cleaning water that is opened and closed based on a human body detection signal of the human body detector. When the detection signal is detected by the human body detector and then the user leaves the toilet and the detection signal is cut off, the water supply valve is switched from closed to open, and after supplying the cleaning water for a predetermined time, it returns to closed again. I have.

By the way, the supply time of the washing water as described above is adjusted so that, for example, in the case of urinal washing, the normal flow rate is 16 to 24 / min and the water supply amount is about 6. However, the flow rate of the washing water depends on the feed water pressure. If the installation conditions are different, the feed water pressure changes and the flow rate also changes, so that a situation where a predetermined flow rate and a total water amount cannot be obtained occurs.

For example, when the water supply pressure is low and lower than a predetermined flow rate, the cleaning is poor. Conversely, when the water supply pressure is high and exceeds a predetermined flow rate, an unnecessarily large amount of water flows and waste of water occurs. It will be.

For this reason, the work of adjusting the flow rate by adjusting the opening of the water stopcock on the upstream side of the water supply valve is performed by a worker when the cleaning device is installed.

(Problems to be Solved by the Invention) However, the flow control work by adjusting the stopcock as described above is mainly performed by a worker who changes the opening of the stopcock while watching the state of the flow of the washing water. And the work is troublesome, and the workability is poor.

Also, even if such adjustment is made, if the water supply pressure fluctuates after installation, the flow rate and the total water discharge amount will change,
There is a drawback that waste of water or poor cleaning occurs.

(Means for Solving the Problems) In order to solve the above problems, an automatic cleaning apparatus of the present invention includes a water supply valve for cleaning water having a variable opening, a human body detector for detecting the presence of a human body, and the like, A flow rate detector for detecting a flow rate of the washing water supplied through the valve; and opening and closing and opening of the water supply valve based on a human body detection signal from the human body detector and a flow rate detection signal from the flow rate detector. Control device for performing the degree control, the control device opens the water supply valve based on the human body detection signal, the opening degree of the water supply valve to a predetermined flow rate based on the flow rate detection signal The water supply valve is adjusted to an appropriate opening degree and the water supply valve is closed when the total water discharge amount reaches a predetermined amount.

(Operation) In the automatic cleaning device of the present invention, the flow rate of the cleaning water is always maintained at a predetermined flow rate by adjusting the opening of the water supply valve by the control device, and the total water discharge amount is also constantly maintained at the predetermined water amount.

(Example) Next, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of an automatic cleaning device used for a urinal or a urinal. In FIG. 1, reference numeral 1 denotes a human body for detecting the presence of a human body, for example, when a person H stands on the toilet (not shown). The human body detection signal of the human body detector 1 is input to the controller 2. Reference numeral 3 denotes a supply pipe for washing water connected to a water supply source 4. The supply pipe 3 is provided with a water supply valve 5 composed of a motor valve whose opening is variable by a motor M that can rotate forward and reverse. A flow rate sensor 6 is provided downstream of the water supply valve 5, and the flow rate sensor 6 detects the flow rate of the wash water discharged from the discharge port 3a. The flow rate detection signal of the flow rate sensor 6 is input to the controller 2, and the controller 2 drives opening / closing and opening control of the water supply valve 5 based on the human body detection signal from the human body detector 1 and the flow rate detection signal. The control is performed through the circuit 7, and such control is performed in the case of urinal washing as an example.
This will be described below with reference to the flowchart shown in FIG.

First, when the power of the controller 2 is turned on, the process proceeds from step START to step S1, all the flags described below are reset to 0, and then, in step S2, a water discharge amount count for counting the water discharge amount based on the flow rate detection signal. Is reset. Next, in step S3, the presence or absence of a human body detection signal is determined. At first, since no human body is detected, the process proceeds to step S4 in which the pre-cleaning flag is set to 0 (in this case, the pre-cleaning flag is already set to 0 in step S1). ing). In step S5, it is next determined whether the main cleaning flag is 0 or 1. Since the main cleaning flag is also 0 in step S1, the process proceeds to step S6, where the open flag of the water supply valve 5 is further set to 0 or 1. Is determined. Since the open flag is also 0 in step S1, a valve open signal is output in step S7, the water supply valve 5 is driven in the opening direction via the drive circuit 7, and the washing water is discharged from the discharge port 3a. In step S8, the flow rate is set to a predetermined set flow rate (for example, 16 /
) Is determined, and if the flow rate is equal to or less than the set flow rate, the flow returns to step S7 and the water supply valve 5 is further driven in the opening direction. If it is determined that the flow rate is equal to or more than the set flow rate in step S8, the water supply valve is determined in step S9. The open flag of 5 becomes 1, and the count of the water discharge amount counter is set to 0 in step S10. Next, in step S11, it is determined whether or not the water discharge amount counted by the water discharge amount counter has exceeded a predetermined set water discharge amount (for example, 4 in the case of a urinal). Step S4, S
After step 5, the process proceeds to step S6. In step S6, since the open flag is 1, the process directly returns to step S11 to continue water discharge until the water discharge amount exceeds the set water discharge amount. If the water discharge amount exceeds the set discharge amount, step S12
, A closing signal of the water supply valve 5 is output, and in step S13, the water supply valve 5 is driven in the closing direction until the flow rate becomes zero. When the water discharge is completely stopped, the open flag of the water supply valve 5 is returned to 0 in step S14, the main cleaning flag is set to 1 in step S15, and the process returns to step S4.

In this manner, the main cleaning is performed first, and thereafter, when the process proceeds from step S3 to step S5 via step S4, the main cleaning flag is set to 0, so that the process directly returns to step S4. For this reason, the water supply valve 5 is kept closed.

Next, when a human body detection signal is output from the human body detector 1,
That is, when the user approaches the toilet and uses it,
Proceeding from S3 to step S16, the main cleaning flag is set to 0. Next, in step S17, it is determined whether the pre-cleaning flag is 0 or 1. Since the pre-cleaning flag remains set to 0 in step S1, the process proceeds to step S18. In step S18, it is determined whether the open flag of the water supply valve 5 is 0 or 1. Since the open flag is 0 in step S14, the process proceeds to step S19, where a valve open signal is output and the washing water is discharged from the discharge port 3a. Is done. Subsequent steps S20 to S26 are the same as steps S8 to S14 of the main cleaning, and the cleaning water is discharged at the set flow rate and the set water discharge amount. However, step S2 in this case
The set flow rate at 0 is the same as that in step S8 (16 / min), but the set water discharge amount in step S23 is a value (1) smaller than the set water discharge amount in step S11.

When the pre-cleaning is completed as described above, the pre-cleaning flag is set to 1 in step S27, and if there is a human body detection signal, steps S3 to S16 and step S16 are performed again.
The process proceeds to step 17, but since the pre-wash flag is set to 1, the process directly returns to step S4, and the water supply valve 5 is kept closed.

When the human body detection signal is no longer output, that is, when the user leaves the toilet after using the toilet, step
Proceeding from S3 to step S4, the main cleaning described above is performed.

That is, once the main cleaning is performed, the pre-cleaning and the main cleaning are always performed at the start of use and after the use of the toilet, respectively.

In the automatic cleaning apparatus of the present embodiment as described above, the controller 2 controls the water supply valve 5 for the cleaning water based on the human body detection signal from the human body detector 1 and the flow detection signal from the flow detector 6.
Opening / closing and opening control of the water supply. Even if the water supply pressure from the water supply source 4 fluctuates, the opening control of the water supply valve 5 based on the flow detection signal always discharges water at a predetermined flow rate optimal for flushing the toilet. Also, by counting the amount of water discharge based on the flow rate detection signal, it is possible to always discharge a predetermined amount of water in accordance with the pre-cleaning and the main cleaning.

The flow sensor 6 may be a generator provided with a water turbine that is driven to rotate by washing water. In this case, an output voltage whose frequency varies according to the rotation speed of the water turbine serves as a flow detection signal.

(Effect of the Invention) In the automatic cleaning apparatus of the present invention, a predetermined flow rate and water discharge amount are always discharged by adjusting the opening of the water supply valve by the control device, so that manual flow rate adjustment work at the time of setting is unnecessary, and This eliminates the need for readjustment due to fluctuations in feedwater pressure. Therefore, waste of cleaning water or cleaning failure can be completely eliminated.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram of an automatic cleaning device used for a toilet, and FIG. 2 is a flowchart of control of a water supply valve by a controller shown in FIG. . DESCRIPTION OF SYMBOLS 1 ... Human body detector 2 ... Controller (control apparatus) 3 ... Supply pipe line 5 ... Water supply valve 6 ... Flow rate sensor (flow rate detector)

Claims (1)

(57) [Claims] 1. A water supply valve for washing water having a variable opening, a human body detector for detecting the presence of a human body or the like, and a flow rate detection for detecting a flow rate of cleaning water supplied via the water supply valve. And a control device for performing opening / closing and opening control of the water supply valve based on a human body detection signal from the human body detector and a flow rate detection signal from the flow rate detector, wherein the control device is The water supply valve is opened based on the human body detection signal, the opening of the water supply valve is adjusted to an opening corresponding to a predetermined flow rate based on the flow rate detection signal, and the total water discharge reaches a predetermined amount. Then, the water supply valve is closed.