JPS62156449A - Water supply control apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] <Field of application of industrial soil> The present invention provides a water supply control system that automatically controls the water supply to a water washer such as a toilet bowl or hand basin based on the detection of the use of the water washer by a sensing section. , especially those whose driving power source is a battery.

<Prior art> Conventionally, as this type of water supply control device,
The one disclosed in Japanese Patent No. 6831 is known.

To explain the method disclosed in Japanese Unexamined Patent Application Publication No. 59-126831, the plunger is moved by energizing the coil in the water supply section, and the valve section is closed. I
It is constituted by a general electromagnetic valve in which the valve state continues and when the power supply is cut off, the plunge V returns and the valve part 111 is closed.

Therefore, in the conventional system described above, it is necessary to continue energizing the coil while the water supply unit maintains the m1 valve state and supplies a predetermined amount of cleaning water, so power consumption is consumed even though the drive power source is a battery. The battery life is short and it is necessary to replace the battery frequently, which is not only troublesome but also uneconomical.

Therefore, as the water supply section, the plunger is moved to open or close the valve by energizing the coil, and the valve state is maintained by a permanent magnet even if the energization to the coil is stopped while the valve is open or closed. It is possible to reduce power consumption by using a so-called latching solenoid, but even if such a latching solenoid is used, the coil must be energized for a predetermined time, for example, 20 msec, when the valve is opened and closed. First of all, this level of power saving is not enough for something whose driving power source is a battery, and even more so! ! It was necessary to reduce the power consumption.

Problem to be solved by the present invention> The problem to be solved by the present invention is to reduce the power consumption of the water supply section.

Means for Solving the Problems> Technical means taken by the present invention to solve the above problems include a water washer, a sensing part that detects the use of the water washer, and a sensing signal from this sensing part. It is equipped with a control section that outputs an open 111 signal to the water supply section based on the control section 311, and a water supply section that opens and opens the valve according to the open/close signal from the control section 311.
At the water supply control point d3, the water supply RIS maintains the ml valve state for 1 meter from the 1 valve signal t from the control section, and closes the valve in response to the 111 valve signal to maintain the valve closed state. It consists of a latching solenoid that stops energizing the water supply part when the valve is open, and the control part starts outputting the latching solenoid (i) and detects the current waveform when the latching solenoid is energized. This is characterized in that the output of the ↑ signal is stopped for an interval when the minimum value is detected.

Function> The present invention uses a latching solenoid as the water supply part, which does not need to be continuously energized to maintain the open state once the valve is opened, and further detects the current waveform that occurs when the latching solenoid is energized, and Utilizing the characteristic of the latching solenoid that the current waveform becomes minimum in the inter-moving part, the current is applied until the minimum value is detected, thereby making the valve part [8 valves] and stopping unnecessary energization after (mlt). .

<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

In this embodiment, as shown in Fig. 1, the water washer (1) is a urinal (1a), and the user is placed above the urinal 5(la), more precisely in front of the urinal (1a). The sensing part (2
) is installed in an embedded manner, and a latching solenoid (4) constituting the water supply section is installed in an embedded manner.

The sensing section (2) includes a light emitting element (2a) consisting of a light emitting diode.
) and a light-receiving element (2b) consisting of a phototransistor.This is a diffuse reflection type infrared sensor 9- equipped with a light-receiving element (2b) consisting of a phototransistor, and is connected to a battery (5) as a drive power source via a control section (3) to be described later.

The light emitting element (2a) communicates with a light emitting drive circuit (3as) of a control unit (3), which will be described later, and emits infrared light according to the output from the circuit (3as), and this infrared light is used for use. The light hits the user standing in front of the urinal (1a) and is diffusely reflected, and a part of this reflected light is received by the light receiving element (2b) and output to the light receiving amplifier circuit (38s), which will be described later. .

The control unit (3) can be roughly divided into a human body detection control unit (3a) that communicates with the sensing unit (2), and a human body detection control unit (3a) that communicates with the sensing unit (2).
3a), and a water supply control section (3b) that operates a latching solenoid (4) based on the output from the human body detection control section (3a). In this embodiment, a case is shown in which the human body detection control section (3a) is configured only by hardware.

To explain the configuration of the human body detection control section (3a) according to FIG. 2, first, the multivibrator (3a+) is
113 t, a pulse signal is continuously transmitted at a period of, for example, 1 second, and this pulse signal is passed through a 1/2 frequency divider (3a2).
and is output to the multiplexer (3a3).

The 1/2 frequency divider (3a2) is the frequency divider (3a2).
This device obtains 1/2 the frequency of the pulse signal from a+>, and continuously transmits a pulse signal with a period of 2t, that is, a 2 second period, and this pulse signal with a period of 2t is also sent to the multiplexer (3
a3).

? )Ii Chiplek'+(3a3) is OR1 path(3a
4) The multivibrator (3a+) outputs a pulse signal with a period t by receiving the selection signal from the multivibrator (3a+), or the 1i2 frequency divider (3a2) outputs a pulse signal with a period t! ! l]
A selection is made as to whether to output a 2t pulse signal, and the selected output from the multiplexer (3a3) is input to the light projection drive circuit (3a6), and based on the output from this light projection drive circuit (3as). Infrared light is emitted from the light emitting element (2a).

That is, the period of infrared light emitted from the light emitting element (2a) is OR
Either t or 2t is selected by the selection signal from the circuit (3a4>).

On the other hand, the light receiving amplifier circuit (
3as) outputs a one-shot pulse signal from the no reflected light one-shot circuit (3ay) when the light-receiving element (2b) does not receive the infrared light even though the light-emitting element (2a) emits infrared rays, and this pulse signal is a flip 70 tube (38
s) and the counter (3aq).

Also, when the light receiving element (2b) receives light, a one-shot pulse signal is output from the one-shot circuit (3a+o) with one light present, and this pulse signal is transmitted to the flip-flop (3).
8a) and output to the count of the counter (3a9).

Normally, when the user is not in front of the urinal (1a), the multiplexer (3az) first selects the frequency It12t and emits light from the light emitting element (2a) at a cycle of 2, but the one-shot circuit (3a7) with no reflected light ) to output a pulse signal to the 7-lip 70-tub (38a) clear, the Nori-tub flop (38s) outputs LOW, and this L
The OW output is sent to the OR circuit (3a4), and since there is no output from the flip-flop (3a+3), which will be described later, to the water supply control unit (3b), the selection of the multiplexer (3a3) remains at the cycle of 2t. It is.

Here, when the light receiving element (2b) receives the reflected light even once and detects the presence of the user, the reflected light is output from the one-shot circuit (3a+o) to the set of flip-flops (38s). (38s) outputs the OR circuit (3a4) head 11 to switch the multiplexer (3az) from the period 2t to the period t as shown in Fig. 2, and from then on, the light emitting element (2a) emits light at the period t. .

The above counter (3ag > has a clear pulse signal input from the no-reflected-light one-shot circuit (3a7) when no user is detected, so the count number is 0, but when a user is detected, no reflected light is detected) Yes Since the pulse signal is input from the one-shot circuit (3a+o) to the count, if this state continues after counting starts, the count will start every time a pulse signal is input from the one-shot circuit (3a+o) to the count. Increase the number and output this number to the digital comparator (3au), and then when the user leaves in front of the urinal (1a), there will be no reflected light and the pulse signal will clear from the circuit (38a). The count is returned to 0 with human help.

The digital comparator (3au) is connected to the above counter (3au).
the count number input from ) and the detection count setting value preset by the detection count setting circuit (3aI2),
For example, if the count number is smaller than the detection count setting value 2, it will not be output to the flip-flop (3a+3), but as soon as the count number becomes larger than the detection count setting value 2, it will be output to the flip-flop (3a+3).
It outputs 1i, and then when the count reaches O, it outputs LOW 1J to the intermediate section.

When the input from the digital comparator (3a++) falls from low to low, the flip-flop (3ao) connects the A N +) circuit (3a+4) and the water supply control unit (3
Output f-1i to b).

The AND circuit (3aH) connects another input terminal to the light projection drive circuit (3as), and
) and outputs Hi to the water supply control unit (3b), outputs to the shift register (3a+s).

The shift register (3a+s) is the light projection drive circuit (3
As), a plurality of Q outputs are provided to replace 1-1i each time an output is output from 1-1i, and the output count setting value is set depending on the number of outputs. In this embodiment, when the fourth Q output becomes 11, the one-shot pulse circuit ( A pulse signal is output from 3a+6).

This pulse signal is input to the shift] register (3a+s) and the flip-flop (3a+a) to clear both of them, and from the flip 70 tube (3a+3) to the water supply fl, I
The output to the I111 section (3b) is switched from Hi to Low, and the output to the OR circuit (3a4) is also made Low. Therefore, if the user uses the urinal (1a) and leaves the urinal (Ia), 7 tupf [1 tup (3a+3
) to the water supply control unit (3b), and when a pulse signal from the one-shot pulse circuit (3a+6) is output from the shift register (3a+s), the output from the 7 lip-flop (3a+3) goes low. Switch to

This Moe has no user, so it flip-flops (3as
) is also 1aw, and the OR circuit <384
) is no longer output from Marjiburekuri (3a:+)
is switched to a period of 2t, and from then on, the cycle +! Light is emitted at II 2 t.

The time charts 1 to 3 of the human body detection control section (3a) are
Dimensions shown in the diagram.

Incidentally, the human body detection control section (3a) is not limited to the one shown in FIG. 5(a) and 5(b), and a time chart is shown in FIG. 6.

Next, the configuration of the water supply u control unit (3b) will be explained according to FIG. It is input to the closed-side AND circuit (3b3), and is also input to the antagonistic disjunctive sum circuit (3t)4).

The exclusive OR circuit (3b4) has a resistor R and a capacitor C interposed on one input side, so that the output from the flip-flop (3aI3) changes from 1 o w' to 1-1 i
A pulse signal is output when switching from 11 to Low and when switching from 11 to Low.

Normally, when no user is detected, the input to the exclusive OR circuit (3b<) is LOW;
1) No pulse signal is output from 4), and the transistors 1 to 1 for opening drive (3b+) and the transistor for closing drive (3b+), which will be described later,
3b+9> maintains the OFF state.

Here, water is supplied from flip-flop (3a+3) 1. ll
When the output to the llll section (3b) switches from Low to 1-11, 1 is output to the - ten thousand terminal of the open side AND circuit (3b1).
・11 is input, LOW is input to one input terminal of the closed side AND circuit (3b3) via the NOT circuit (3bz), and a pulse signal is output from the exclusive OR circuit (3b4). .

This pulse signal is input to the flip-flop 70 (3bs) and outputs 1-11, and is also input to another flip-flop (3116) so that the Q output becomes 1-Ii.
The Q output horn becomes LOW, which is also input to the 50 msec one-shot timer (3b7), which starts its operation and makes the Q output high.

The output of the flip-flop (3bs) and the output of the 50msec timer (3b7) are connected to an AND circuit (3bs).
1) s), but since both circuits are Hi, the circuit (3ba) outputs Hi to the other input terminal of the open side AND circuit (3b+) and the other input terminal of the 111 side AND circuit (3b3), respectively. .

Therefore, in the open side AND [il path (31) +), both input terminals become 111, and the open drive transistor (3bq)
output to turn it on.

When the inter-drive transistor (3bq) is turned on, the drive current is transferred from the battery (5) to the operating coil (4a) of the wrapping solenoid (4), which will be described later. The JJ current I starts flowing, and the drive current I passed through the coil (4a) returns to the battery (5) via the opening drive transistor (3b9) and the resistor R.

At this time, the voltage generated in the open drive transistor (3b9) is detected by the voltage detection circuit (3b+o), and this detected voltage is applied to the peak detection circuit (3bu) and the margin addition circuit (3b).
b+2), the bottom detection circuit (3b+a), and the margin subtraction circuit (3tls).

Also, the Q output of the flip 70 tube (31)s) is 1
-11, the peak detection circuit (3b++) starts operating, but since the Q output is low, the bottom detection circuit (3b+3) remains in a stopped state.

On the other hand, when energizing the wrapping solenoid (4), which will be described later, the time vs. current characteristics are as shown in Figure 8. When the current is applied, the current increases, and then after a predetermined time, the current decreases by -1:l due to the generation of counter electromotive force as the plunger (4C) moves. Since the electromotive force becomes 0, the current continues to be -hi from then on, and the time required from when the current starts to flow until the current starts rising again is estimated to be at most 6 times. It was found that the time was within about 10 msec.

The peak detection circuit (3bu) tracks only high voltages, detects the current maximum value due to the current applied to the operating coil (4a), and outputs the current maximum value to the inverter (3b+s) for peak detection ON. .

The peak detection ON comparator (3b+s) uses the above current maximum value and a margin addition circuit (31) that adds a predetermined margin to the current waveform when the wrapping solenoid (4) is energized.
1? ) and the output obtained from the circuit (3b+z
) becomes smaller than the maximum current value, at that point the output is output to clear the flip-flop (3b6).

When a clear signal is input to the flip-flop (3b6), the Q output becomes LOW, stopping the operation of the peak detection circuit (3bn), and the 0 output becomes 1-11, causing the operation of the bottom detection circuit (3b+a) to become v1. Start.

The bottom detection circuit (3b+3') tracks only low voltages, and detects the current minimum value of the back electromotive force O when the valve part (4d) is open, and converts the current minimum value into the bottom detection ON comparator ( 3b+s).

The bottom detection ON comparator (3b+s) is the margin [i circuit (3b
I4) and the output obtained from the circuit (3bH)
When the output obtained from increases beyond the current minimum value,
At that point, it outputs a clear signal to the flip-flop (3bs).

When the clear signal of the Noritsubu flop (3bs) is input, the output becomes LOW and the open side A is output from the AND circuit (3bs).
In order to output a LOW signal to the ND circuit (3b+), the open driving l transistor (31)s) is turned off and the supply of drive current l from the battery (5) to the operating coil (4a) is stopped.

Note that when the upper driver transistor (3bs) is ON, the margin adding circuit (3bs) may be disconnected due to some abnormality.
There may be cases where the output obtained from 1)+2) does not exceed the current maximum value or the output obtained from the margin subtraction circuit (3b++) does not exceed the current minimum value, and in these cases, the flip 70 Tsubu (3bs
) because there is no input to clear the open drive transistor (
3bs) remains ON, and energization from the battery (5) to the operating coil (4a) is not stopped, but is energized and released.

However, even in such an abnormal state, the human power to the water supply control unit (3b) is 50TrL!
After j, the one-shot 1~timer (3b7) times up for 50 msec, and the Q output becomes low and the AND circuit (3bs
) changes from Hi to LOW, so lff
1 drive transistor (3b9) turns OFF, stopping the power supply from the battery (5) to the operating coil (4a), and the Q output becomes 1-l i--, so the NAND circuit (3b
+7) is set to LOW and the inoperable lamp (3bt
s) is turned on to notify the product of an abnormal condition.

Then, a pulse signal is generated from the one-shot pulse circuit (3a+6) by the output from the shift register (3a+s>), and this pulse signal causes the flip-flop (3a+
The output from 3) to the water supply control unit (3b) changes from Hi to LOW.
When switched to , Hi is input to one input terminal of the open side AND circuit (3b3) via the NOT circuit (3b2), and the flip-flop (3bs) (3bs) is input from the exclusive OR circuit (3b4). And a pulse signal is output to the 50 msec one-shot timer (3b7).

Therefore, both input terminals of the close-side AND circuit (3bz) become Hi, and output to the close drive transistor (3b19) to turn it on.

(2) When the drive transistor (3b+s) is turned on, the drive current 1 starts flowing from the battery (5) to the return coil (4b) of the latching solenoid (4), which will be described later.

After that, the above-mentioned 1-transistor for opening drive (3bs)
Similarly, the peak detection circuit (3bn) detects the return coil (
The peak detection ON comparator (31)+s) compares the current maximum value obtained by applying current to When it becomes smaller than 1, the flip-flop (3b6) is cleared at that point, and the valve part (3b+4) is cleared by the valve detection circuit (3b+4).
The minimum current value obtained when the valve is closed in 4d) is compared with the margin reduction p output obtained from the margin reduction cylinder circuit (3t) + 4) using the bottom detection ON valve regulator (3b+6), and the margin reduction 0 output is the current When it becomes larger than the minimum value, at that point, one control flop (3bs) is cleared and 111 drive 1 to transistor (3t19) is set to 0.
1-By making it F-like rl, ? The supply of drive current I from the HD (5) to the recovery coil (4b) is stopped.

FIG. 9 shows the time period p-1 of the water supply control unit (3b) which refuses the request.

The latching solenoid (4) opens and closes the valve portion (4d) by moving the plunger (4C) up and down by energizing the operating coil (4a) and the return coil (4b) as shown in FIGS. 10 and 11. The one shown in the figure, which has a conventionally well-known structure, first brings the lower surface of the plunger (4C) into contact with and separates from the pyrower hole (4r) opened in the center of the diaphragm (4C), and then opens the valve part (4d). ffl L, by moving water in and out of the pressure chamber (4g) formed behind the diaphragm (4C), the diaphragm (4c) is moved up and down, and the lower surface of the diaphragm (4e) is flushed against the valve seat (4h). ), and the main valve (41) is moved 1,711 m away from the urinal (
1a) is used to supply cleaning water.

The operating coil (4a) and the return coil (4b) are stacked vertically in a metal case (4j), and a metal head (4k) is placed inside these coils (4a) (4b). The upper part of the head (4k) is fixed to the case (41i) by inserting the head (4k), and a plunge t (4C) is provided below the head (4k).

The plunger p (4c) is disposed within the return coil (4b) so as to be able to move up and down, and the plunger (4C) is located at the bottom of the plunger p (4c).
A spring (4J
), and a permanent magnet (4m) is placed on the outer periphery of the plunger tI (4C) in contact with the lower surface of the case (4j).

To explain the operation of the logging solenoid (4) that refuses, when a user is not detected, the spring (4J) presses the plunger (4C) downward to open the pilot hole (4F). At this time, the magnetic flux of the permanent magnet (4++) acts in the direction of attracting the plunger (4C), and the pilot hole (4f) is held in a closed state with the lower surface of the plunger (4C), and the main valve (40 ) maintains the m-valve state.

If current is applied to the operating coil (4a) in this state, a magnetic flux is generated that tries to attract the plunger y (4C) upward, and this magnetic flux gradually becomes stronger, for example, the operating coil (4a).
) within about 10 milliseconds after starting to energize the plunger (4
When C) starts to move upward, a back electromotive force is generated, and at the same time, the pilot hole (4[), which had been blocked, opens and the valve portion (4d) opens, and the above-mentioned back electromotive force becomes zero. When the valve part (4d) opens, the water in the pressure chamber (4g) is discharged from the pilot hole (41) to the secondary side, and when the lower surface of the diaphragm (4C) separates from the valve seat (4h), the main valve ( 41) opens.

After that, the plunger (4C) further moves upward, compressing the spring (4)), and finally the upper surface of the plunger (4C) comes into contact with the lower surface of the head (4k), and the counter electromotive force becomes O.

At this time, the magnetic flux of the permanent magnet (4m) forms a circulation path from the outside of the magnet (4m), passes through the case (4j), the head (4k), and the plunger (4C), and returns to the inside of the permanent magnet (4m). (4C) remains sucked into the head (4k), that is, maintains the volume valve state shown in FIG. 11.

In addition, during this time, when the return coil (4b) is energized to change the valve state from the valve state to the closed state again, a magnetic flux is generated in the opposite direction to the circulation rr & path of the magnetic flux of the permanent magnet 'FJ (4m), and this magnetic flux gradually For example, within about 10 milliseconds after the return coil (4b) starts to be energized, the elastic force of the spring (4J) starts to move the plansite (4r:) downward and a back electromotive force is generated. The lower surface of (4c) closes the pyrower 1 to hole (4[), the valve part (4d) closes, and the above-mentioned back electromotive force becomes O. When the valve part (4d) opens, the die 17 flam (4C) A small hole drilled on the outer circumferential side (4C)
The water on the next side from n) flows into the pressure 1 (4u), and the water supply pressure causes the lower surface of the daicephram (40) to press against the valve seat (4).
1+), the main valve <41) closes, and the 1st
It will be in the state shown in Figure 0.

Furthermore, what is shown in FIG. 12 shows another embodiment of the water supply control section (31);
The output from 3a) is directly connected to the flip-flop (3bs
) (3b6) and 50ms one-shot timer (3
b7) to start and stop energization from the battery (5) to the operating coil (4a) in the same way as in the front claw embodiment.

20m seconds through the main circuit (3b?o)
Battery (5) by inputting to timer (3b2+)
energization to the return coil (4b) is started and stopped.

That is, in the case of FIG. 12, when the input to the water supply control unit (3b) switches from Hl to low after the detection of the user, N0
The output of the 7th circuit (3b2o) becomes Hi, starts the operation of the 20 second one-shot timer (3b2+>, outputs the output to the leap drive transistor (3b+s) to turn it on, and connects the recovery coil (3b2+) from the battery (5). 4b) starts energizing.

Then, 20 milliseconds after the start of operation 1'A1 of the 20 millisecond one-shot timer (3b2+), the closing drive transistor (3b+9) is turned off to stop supplying electricity from the battery (5) to the return coil (4b).

The time chart of the water supply section detection control section (3b) that refuses
Shown in Figure 3.

In addition, in the front claw embodiment 43, the water washer (1) is the urinal (1).
Although the case a) is shown, the present invention is not limited to this, and for example, the water washer (1) may be a hand washer (1b) as shown in FIG. 14.

In this case, a sensing part (2) is installed on the wall (A) of the rear F side of the hand basin (1b), and the sensing part (2) detects when a user approaches the hand basin (1b) to wash their hands. When detected, the water supply unit (4) is energized to start supplying water from the water supply device (1b+), and when the user leaves the hand wash "FA (lb)" after washing hands, the water supply is stopped.

Ill, as shown in FIG. 15, a flip-flop (3
ao) outputs an output of 11 from LOW, and the flip-flop (3a13) does not output an output of l-OW from l-1i due to the one-shot pulse circuit (3a7) without reflected light.

I from 1aw from this flip-flop (3a+3)
At the time of output 1 to -1i or from l-1i to low, the water supply control unit (3b) operates t\: as in the previous embodiment.

In addition, the unit outputting 1"i from the flip-flop (3a+3) to the water supply control unit (3b) switches the multi-brake 1 (3a3) from the cycle Ill 2 t to the cycle t,
When outputting Low, the cycle is switched from t to cycle 2t.

Furthermore, in the front claw embodiment, the sensing portion (2) is connected to the wall surface (A).
Although the sensing portion (2) is installed in an embedded manner, the structure of the sensing portion (2) is not limited to that shown in the drawings and may be arbitrary.

<Effect of the invention> Since the present invention has the above configuration, it has the following advantages.

■ As the water supply part, we use a latching solenoid that does not need to be continuously energized to maintain the open state once the valve is opened, and also detect the current waveform that occurs when the latching solenoid is energized, and detect the current waveform when the plunger is closed. Utilizing the characteristic of the latching solenoid that the value is minimal, the valve is opened by energizing until the minimum value is detected, and unnecessary energization is stopped after the valve is opened. The power consumption of the water supply section can be extremely reduced compared to systems that require continuous energization.

Therefore, the life of the battery is improved, and there is no need to frequently replace the battery.Therefore, not only is there an economical advantage of greatly reducing carrying costs, but also the effort required to replace the battery is greatly reduced.

■ If the latching solenoid is energized normally and the latching solenoid is activated, the minimum value can be detected a predetermined time after the coil starts being energized, but if the t3 minimum value cannot be detected after a predetermined time has elapsed after the energization starts, the plunger will not operate. Since it is known that the battery is not in use, it is possible to detect abnormalities in the valve part or detect current shortage and know when to replace the battery.

[Brief explanation of drawings]

Figure 1 shows an embodiment of the present invention, a water supply system equipped with f, II equipment! A cross-sectional side view, FIG. 2 is a block diagram of the human body detection system TA11 section, FIG. 3 is the same time chart 1~, FIG. 4 is a J-block diagram showing another embodiment of the human body detection control section, and FIG. (a
) and Fig. 5(b) are the same flow chart, Fig. 6 is the same time chart, Fig. 7 is a block diagram of the water supply control section, and Fig. 8 is the same flow chart.
The figure is a graph showing the time versus current characteristics when the latching solenoid is energized, Figure 9 is a time chart of the water supply control section, Figure 10 is an enlarged longitudinal cross-sectional view of the water supply section showing the state of the main valve 1'J1, and Fig. 11 is an enlarged vertical cross-sectional view of the water supply section showing the open state of the main valve, Fig. 12 is a block diagram showing an embodiment of the water supply control section, and Fig. 13 is the same time chart;
FIG. 4 is a partially cutaway front view showing a case where the washing machine is a hand washing machine, and FIG. 15 is a block diagram of the same human body detection control section. 1... Water washer 2... Sensing section 2a... Light emitting element 2b... Light receiving element 3... Control section
4... Water supply part 5... Battery

Claims (1)

[Claims] A water washer, a sensing part that detects the use of the water washer, a control part that outputs an opening/closing signal to the water supply part based on a sensing signal from the sensing part, and a water supply that opens and closes a valve based on the opening/closing signal from the control part. In the water supply control device, which uses a battery as a driving power source, the water supply section opens the valve in response to a valve opening signal from the control section and maintains the valve open state, and closes the valve in response to the valve closing signal and maintains the valve closed state. The control section starts outputting a valve opening signal, detects the current waveform of the latching solenoid when it is energized, and controls the current. A water supply control device characterized in that output of a valve opening signal is stopped when a minimum value of a waveform is detected.