JPH0649880A - Automatic water supply device for urinal - Google Patents

Abstract

PURPOSE:To economize water without remarkably lowering washing effect for a urinal, by providing a control section for controlling so as not to execute regular washing in the case where a human body is not detected after washing. CONSTITUTION:A control box 5 is set up on the back of a urinal, and a human body detector 1 and the control box 5 are mutually connected with a signal conductor. Opening and closing signals are sent from a control section 3 on the input of a detecting signal issued from the human body detecting device 1 to control the opening and closing of a solenoid valve 9. The solenoid valve opens to discharge water through a water discharge port and closes to stop water discharge. Thus in the case where a user leaves during prewashing, regular washing is not executed, and water can therefore be economized without remarkably lowering washing effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automatic urinal water supply device,
In particular, it relates to a technique for saving water in automatic cleaning.

[0002]

2. Description of the Related Art Conventionally, there is an automatic urinal cleaning device which is set to detect a human body in front of a urinal by a human body detection device to perform pre-cleaning and perform main cleaning after the human body has left the front of the urinal. It is known from Japanese Patent Publication No. 3-77896.

[0003]

However, in the above-mentioned conventional example, when the user leaves during the pre-washing, it means that the urination is completed while the wash water is being supplied, Even in such a case, there has been a problem that the main flush water is supplied to the urinal after that and it is wasted.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide an automatic urinal water supply device capable of saving water without significantly reducing the cleaning effect of the urinal. To provide.

[0005]

The automatic urinal water supply system of the present invention detects a human body in front of the urinal 2 by the human body detecting device 1 to perform pre-cleaning and at the same time after the human body has left the front of the urinal 2. An automatic urinal cleaning device set to perform cleaning is provided with a control unit 3 for controlling not to perform main cleaning when there is no human body detection after completion of pre-cleaning. By adopting such a configuration, the problems of the conventional example described above are solved and the object of the present invention is achieved.

[0006]

According to the present invention having the above-described structure, the control unit 3 is provided to control the main cleaning so that the main cleaning is not performed when there is no human body detection after the completion of the pre-cleaning. If you walk away during cleaning, the main cleaning is not performed and water is saved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. 3 to 4 show a front view and a rear view of the urinal 2. A water outlet 4 is provided above the urinal 2, and a human body detection device 1 is provided above the water outlet 4. The human body detection device 1 includes a light projecting element and a light receiving element. A control box 5 is installed in a recess on the back surface of the urinal 2, and the human body detection device 1 and the control box 5 are connected by a signal line 6. As shown in FIGS. 1 and 2, a control unit 3 including a control circuit is provided in the control box 5, and a battery 7 serving as a power source is housed therein. In FIG. 1, reference numeral 8 denotes a battery lid, which is slid to open half. Reference numeral 9 denotes a solenoid valve that serves as a water supply unit. When the detection signal from the human body detection device 1 is input, an opening / closing signal is output from the control unit 3 to control the opening / closing of the solenoid valve 9. It is designed to spout water from or stop water spouting. That is, the human body detecting device 1 detects the human body in front of the urinal 2 to perform pre-cleaning,
The solenoid valve 9 is controlled by the control unit 3 so that the main cleaning is performed after the human body has left the front of the urinal 2. In this case, further, in the present invention, it is set to be controlled by the control unit 3 so that the main cleaning is not performed when there is no human body detection after the completion of the pre-cleaning. In FIG. 4, 10 is a water shutoff valve, 11 is a strainer, and 12 is a check valve.

FIG. 5 shows a timing chart for explaining the operation of the present invention. In the present invention, however, the control unit 3 waits for the input of the detection signal continuously after the state where there is no detection signal from the human body detection device 1 (that is, the state where no person is in front of the urinal 2). This state is referred to as a standby state), and as shown in FIG. 5, the light projecting element is controlled to be pulse-driven at a constant cycle Tm. And
In this standby state, if the detection signal input from the human body detection device 1 satisfies a predetermined condition, the presence detection of the user is confirmed, and a valve opening signal is output to the solenoid valve 9 which is the water supply section to output the discharge port. Pre-cleaning is performed from 4. At this time, as shown in FIG. 5, in the presence detection state, the determination of the light emitting pulse output and the detection signal input is stopped, and after a predetermined time of pre-cleaning, a valve closing signal is output to the solenoid valve 9 and the light is emitted again. The optical pulse output and the sensing signal input are judged. After that, if it is the original operation, the main cleaning is performed for a predetermined time after the user leaves, but if there is no detection signal for a predetermined number of times, for example, two consecutive times after the completion of the pre-cleaning, It is assumed that the user has left the urinal 2 and does not perform the main cleaning as shown in FIG. Also,
After the presence detection of the user is confirmed and the pre-cleaning is performed, when the user is continuously used, the main cleaning is performed after the user leaves. At this time as well, similarly to the pre-cleaning, the determination of the light emitting pulse output and the sensing signal input is stopped, and after the main cleaning is performed for a predetermined time, the opening / closing signal is output to the solenoid valve 9 and the light emitting pulse output and the sensing signal input are performed again. Is determined. After that, if it is the original operation, it will be in the standby state as it is, but if the detection signal is input a predetermined number of times, for example, twice in succession after the main cleaning, it is considered that there is a next user during the main cleaning. , Fig. 5
As shown in (b), the pre-cleaning is not performed, but only the main cleaning is performed after the user leaves.

[0009]

As described above, according to the present invention, the human body detecting device detects the human body in front of the urinal to perform the pre-cleaning, and the main cleaning is performed after the human body has left the front of the urinal. In the set urinal automatic cleaning device, since a control unit is provided to control not to perform main cleaning when there is no human body detection after completion of pre-cleaning, if the user leaves during pre-cleaning, The main cleaning is not performed, and water can be saved without significantly reducing the cleaning effect.

[Brief description of drawings]

FIG. 1 is a front view showing the relationship between a control box, a human body detection device, and a solenoid valve of the present invention.

FIG. 2 is a partially cutaway side view of the above control box.

FIG. 3 is a front view of the above urinal.

FIG. 4 is a rear view showing the internal mechanism of the above urinal.

FIG. 5 is a timing chart for explaining the operation of the above.

[Explanation of symbols]

 1 human body detection device 2 urinal 3 control unit

Claims (1)

[Claims] 1. An automatic urinal cleaning device set to detect a human body in front of the urinal by a human body detection device to perform pre-cleaning and to perform main cleaning after the human body has left the front of the urinal. An automatic urinal water supply device, comprising a control unit for controlling not to perform main cleaning when there is no human body detection after completion.