JPS63225777A - Automatic faucet device - Google Patents

Abstract

PURPOSE:To make automatic open/close control of a faucet based on existence of an object by providing a control section for making open/close control of the faucet according to the distance to the object existing below a water delivery unit. CONSTITUTION:Supersonic wave 8 transmitted from a supersonic wave transmitter 7a is reflected by a hand 8 and received by a receiver 7b, then amplified by an amplifier 9 and detected by a detection circuit 10. A distance l3 has been set as a referential level, and an output is produced from a comparator 11 when the count reaches to such value as l3+ or -X(Where, X is a predetermined value.). The detected signal is counted by a counter circuit 4, and the count increases as the distance between the supersonic transmitter 7a and the object for reflecting the supersonic wave increases.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic faucet device that automatically starts and stops discharging water.

[Conventional technology]

BACKGROUND ART Conventionally, devices of this type have been proposed that automatically discharge water or prohibit water discharging depending on the presence or absence of reflected light from an object.

[Problem that the invention seeks to solve]

However, such conventional devices have a problem in that detection is unstable because the amount of incident light changes when the reflectance of the target object changes.

[Means for solving problems]

In order to solve all of these problems, the present invention is designed to control the opening and closing of a faucet in accordance with the distance to an object below the water spout.

[For production]

The opening and closing of the faucet is automatically controlled depending on the presence or absence of an object.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention.

In the figure, reference numeral 1 denotes an operating section, which has two switching functions: face washing and hand washing. If the function is currently set to the hand washing mode, a signal representing the hand washing mode is supplied to the control circuit 2, so the control circuit 2 puts the amplifier 3 into the operating state and resets the counting circuit 4 to the initial state. , and does not accept a signal generated from a switch 5 that operates in conjunction with a drain plug, which will be described later.

Therefore, the output of the oscillator 6 is supplied via the amplifier 3 to an ultrasonic transmitter 7a embedded in the water discharging tool 7. The ultrasonic waves sent out from the ultrasonic transmitter 7a are reflected by the hand 8, received by the receiver 7b, amplified by the amplifier 9, and detected by the detection circuit 10. Ultrasonic transmitter 7a and ultrasonic receiver Tb
As shown in FIG. 2, is embedded in the lower surface of the water spout T near the water spout, and the ultrasonic wave transmitter 7a sends out ultrasonic waves below it. Water surface 12. The ultrasonic waves reflected from any of the bottom parts 13 of the water washer are received by the ultrasonic wave receiver 7b.

The detected signals are counted by the counting circuit 4, and this count increases as the distance from the ultrasonic transmitter 7a to the object that causes the reflection increases. Further, the comparator 11 receives a signal indicating hand washing supplied from the operation unit 1, and the reference value for comparison is set to the distance t3 in FIG. It is designed to send an output when it reaches a predetermined value (predetermined value). Reference numeral 14 denotes an electromagnetic pulp, which is energized when the output signal sent from the terminal 11a of the comparator 11 is supplied via the OR circuit 15, and operates a faucet that supplies water to the spout of the water spouting device 7. It is designed to open. For this reason, when the hand 8 is brought close to the water spout 7 in the hand washing mode, an output signal is generated from the comparator 11, the solenoid valve 14 is energized, water starts flowing from the water spout, and when the hand 8 is removed, the water stops. .

In this way, distance measurement is carried out all the time, and when a hand is inserted into the distance measurement range, it is determined that the measured distance is shorter than normal, and water begins to flow, and when the hand is removed, the water stops.

Figure 3 shows a sectional view of the water washer 15, with 15aFi drain valve, 15b a drain valve lever, and 16 a non-faucet lever 15bf.
: A signal line that connects the signal of the switch 5, which turns on and off in conjunction with the operation, to the control unit 1T shown in FIG. 1. Then, when the drain plug lever 15b is operated to move the drain plug 15a downward and close the drain port, the switch 5 is turned on, and the on signal is transmitted to the signal line 16.
The signal is supplied to the control circuit 2 via. When the operating section 1 is set to the face-washing mode, the face-washing mode signal is sent to the control circuit 2.
The control circuit 2 receives the signal from the switch 5. At this time, the control circuit 2 operates the amplifier 3 and the counting circuit 4 when the switch 5 is on, and does not operate when the switch 5 is off. Further, when the water level is determined to be less than the distance 42 shown in FIG.
An output signal is generated from the distance 42 or more, and no output signal is generated when the distance is 42 or more. Therefore, when the drain valve is closed, water is injected up to the water level of distance t2 and stops at that water level.

In this case, when the detected distance is greater than the value to the bottom 13 of the faucet indicated by distance t1 in FIG. format. Therefore, the indicator 18 emits light to indicate that there is an abnormality.

In the above embodiment, the water supply stop distance in the face wash mode was set to the distance t2 in FIG.
5, the height of the overflow mouth 15c is the highest water level,
Naturally, it may be set to a lower value.

〔Effect of the invention〕

As explained above, this invention uses ultrasonic waves to measure the distance to the object, so unlike the conventional method that simply determines whether the object has grown or not, stable detection can be performed. It has this effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are sectional views showing the relationship between a water discharging device and a water washer. 1...Operation unit, 2...e control circuit, 4...counting circuit, 5...φ switch, 7...water discharging tool, 7a
...Φ Ultrasonic transmitter, Tb... Ultrasonic receiver, 1
1...Fist comparator, 15a...Fist/drain plug.

Claims (3)

[Claims] (1) In an automatic faucet device that opens and closes the faucet of a faucet that supplies water to a water washer equipped with a drain faucet, a control unit that controls the opening and closing of the faucet according to the distance to an object below the faucet. An automatic faucet device characterized by the following: (2) The control unit opens the faucet if the drain faucet is closed and the water level in the washer is below a predetermined value, and closes the faucet when the water level exceeds the predetermined value. An automatic faucet device according to claim 1, characterized in that: (3) A patent claim characterized in that the control unit has a self-diagnosis function that measures the distance to an object below the water discharging device and detects a failure when the distance is determined to be an impossible predetermined value or more. The automatic faucet device according to item 1.