JPS62156448A - 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] <Industrial Application Field> The present invention provides a water supply control device that automatically controls the water supply to a flushing device such as a toilet bowl or a washbasin based on a sensing unit that detects that flushing is not being used. , especially Kakeru! vI The power source is a battery.

<Prior art> Conventionally, as this type of water supply υ1tllll neck attachment,
The one disclosed in Japanese Patent No. 9-126831 is known.

To explain the method disclosed in Japanese Unexamined Patent Publication No. 59-426831, the sensing section constantly emits infrared rays several thousand times per second from a light projecting element, and this infrared ray hits the user of the toilet and reflects it. It is composed of a diffuse reflection type photoelectric sensor that generates a sensing signal when a light receiving element receives the reflected light, and when the light receiving element receives the reflected light, f, 11
The timer installed in the 111 section is energized to start its operation 01, and only when the timer continues to receive light until the timer times up, a valve opening signal is output to the water supply section, and the reflected light is received before the timer times up. When the valve runs out, a valve opening signal is issued to prevent the sensor from malfunctioning.

Therefore, the sensing unit is constantly emitting infrared rays, which consumes a lot of power, and the timer installed in the control unit to prevent malfunctions also needs to be energized, which consumes even more power. It is had.

In other words, although the conventional power source is a battery, it consumes a lot of power, so the battery life is short and it is necessary to replace the battery frequently, which is not only troublesome but also uneconomical. There is also.

<Problems to be Solved by the Invention> A problem to be solved by the present invention is to reduce the power consumption of the sensing section and the control 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. In the water supply υ control device, which uses a battery as a driving power source, the water supply υ control device includes a control unit that sends an opening/closing signal to the water supply unit based on the control unit 11, and a water supply unit that opens and closes the valve based on the opening/closing signal from the control unit 11. The light emitting element and the light receiving element are configured with an infrared sensor on the right, and the infrared light emitted by the light emitting element is emitted intermittently at a predetermined period, and the control unit controls the number of times the reflected light is received by the light receiving element. The valve opening signal is output to the water supply section only when the counted number reaches a predetermined number.

Effect> The present invention intermittently projects infrared rays from a light projecting element to create a non-light emitting state intermittently that does not consume power, and reduces the number of times reflected light received by the light receiving element to 0. If the reflected light disappears while the number of reflected light is less than the predetermined number, the valve opening signal is not output, and the count number of the number of light receptions reaches the predetermined number. By outputting a valve opening signal to the water supply section 17 only when the temperature becomes O, the water supply section is opened without using a separate timer for preventing malfunction.

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

In this embodiment, as shown in FIG.
The case of (1a) is shown, and the wall surface (Δ ), the sensing part (2) is embedded in the water supply part (4), and a latching solenoid is used in the water supply part (4).

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, it is a diffuse reflection type infrared sensor, and is connected to a battery (5) of the power source via a control section (3), which will be described later.

The light emitting element (2a) communicates with the light emitting drive circuit (3as) of the t, II control section (3), which will be described later, and outputs the light from the circuit (3a5).
) emits infrared rays by output from the urinal (1a), and this infrared light hits the user standing in front of the urinal (1a) to relieve himself and is diffusely reflected, and a part of this reflected light is transmitted to the light receiving element (1a). By receiving light in 2b), a light receiving amplifier circuit (3a6), 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).
), 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.

The structure of the human body detection control section (3a) will be explained according to FIG. 2. First, a pulse signal is continuously transmitted from the multivibrator (3a+) at a predetermined period t, for example, at a period of 1 second.
This pulse signal is output to the 1/2 frequency divider E (3az) and the multiplexer 1J (3a3).

The 1/2 frequency divider (3az) is the multivibrator (
Since the frequency of 1/2 of the pulse signal from 3a+ is multiplied by V, the pulse signal is continuously transmitted with a period of 2t, that is, a period of 2 seconds, and this pulse signal with a period of 2t is also output to the multiplexer (3a3). .

The multiplexer (3at) receives a selection signal from the OR circuit (3a+) and outputs a pulse signal with period t from the multivibrator (3a+), or outputs a pulse signal with period 2t from the 1/2 frequency divider (3a2). Select whether to output the signal and select the multiplexer (3a
The selected output from 3) is the light projection drive circuit (3as)
Infrared rays are projected from the light projecting element (2a) based on the output from the light projecting drive circuit (3a5).

That is, the period of infrared light emitted from the light emitting element (2a) is 01
tht2t is selected by the selection signal from the circuit (3a<).

On the other hand, the light receiving amplifier circuit (
386) emits infrared rays from the light emitting element (2a) and when the light receiving element (2b) does not receive any light, the one shot circuit (3a7) without reflected light outputs a pulse signal of is a flip-flop (38a
) and to clear the counters (3a, , ).

Also, when the light receiving element (2b) receives light, it outputs a pulse signal of the one-shot circuit (3a+o) J: re-one-shot 1~ with reflected light, and this pulse signal is transmitted to the flip-flop [1
It is output to the hit of the knob (:3as) and the run l~ of the counter (3a9).

1.1 with no normal user in front of the urinal (1a)
First, the multiplexer (3az) selects 2t and emits light from the light emitting element (2a) at a period of 2t, but in order to output a pulse signal from the one-shot circuit (3a7) without reflected light to clear the flip-flop (3aa). , the flip-flop (3all) outputs low, and this L
The OW output is input to the OR circuit (3a4), and since there is no output from the multiplexed flip-flops (3a+3) to the water supply control unit (3b), multiplexing is performed.

The selection of (3a3) remains at the period 2t.

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). (33a) outputs 11i to the OR circuit (3a4) to change the multiplexer (3a3) from period 2 to period t as shown in FIG.
After that, the light emitting element (2a) emits light at a period of t.

When the counter (3a9) does not detect a user, the pulse signal is cleared from the no-reflected one-shot circuit (3a7), so the count is O, but when a user is detected, the pulse signal is reflected. Since a pulse signal is input to the count from the one-shot circuit with light (3ato), if this state continues after starting Call 1-, each time a pulse signal is input to the count from the one-shot circuit with reflected light (3a+o). Increases the count number and outputs the oral count number to the digital comparator (3au), and when the user leaves in front of the urinal (1a), the pulse signal is cleared from the one-shot circuit (3aB) without reflected light. The count is returned to O by manual effort.

The digital comparator (3an) is connected to the above counter (
3a9) is compared with the detection count setting value, for example 2, set in advance by the detection counter 1 to setting circuit (3a12), and if the count number is smaller than the detection count setting value 2, the flip-flop (3at3) is compared. ), but when the count number becomes larger than the detection count setting value 2, it outputs 1-11 to the flop (3a+3), and at the same time the (recount]-number becomes O. Outputs low.

When the input from the digital comparator (3an) falls from HI to LOW, the flip-flop (3a+a) outputs 1 to the AND circuit (3a+4> and the water supply control unit (3b)).
Outputs 11.

The AND circuit (3a+4) connects the input terminal of the negative tree to the light projection drive circuit (3as), and the circuit (3a
s) when outputting from H water supply control section (3b) 1
When outputting 1, it is output to the shift register (3a+s).

Shift 1 to register (3a+s) are the light projection drive circuit (
A plurality of Q outputs are provided to replace 1-11 each time an output is output from 3as), and the output count setting value is set depending on the number. In this embodiment, when the fourth Q output becomes Hl, the one-shot pulse circuit (3at6 ) to output a pulse signal.

This pulse signal is input to the shift register (3a+s> and the flip-flop (3a+3>) to clear both of them, and the water supply control unit (3a
b) Switch the output from Hl to LOW and at the same time
The output to circuit 11 (3a4) is set to LOW. Therefore,
The user uses the urinal i1!1 (la) to use the urinal (1a
), a high output is input from the flip-flop (3a+3) to the water supply control unit (3b), and the output from the shift register (3a+s) causes one shock 1.
~When the pulse signal from the pulse circuit (3a+6) is output, the output from the 7 lip flop (3a+3) switches to Low.

At this time, there is no user, so the flip-flop (3aB
) is also LOW, and the output from the OR circuit (3a<> disappears, switching the multiplexer (3a3) to a cycle of 2t. From then on, the output from the light emitting element (2a) is 2t.
to project light.

The time chart 1- of the human body detection control section (3a) is set to the third
As shown in the figure.

Next, the configuration of the water supply system 611 (3b) will be explained according to FIG.
The six signals are input to the closed-side AND circuit (3b3) via the OR circuit b2), and are also input to the exclusive OR circuit (3b4).

The exclusive OR circuit (14) has a resistor R and a capacitor C interposed on one input side. By doing this, flip-f[1
When the output from the knob (3a+3) switches from LOW to HI and when it switches from 1-11 to 1 and OW, a pulse signal is output to 1.

Normally, when the user is not detected, the input to the iJl alistic OR circuit b< The transistor (3bs) and closing drive transistors 1 to (3b+q) maintain an OFF state.

Here, from the flip-flop (3 caps 3) to the water supply control unit (3
When the output to b) switches from Low to Hi, Hl is input to one input terminal of the 1111 side AND circuit (3b+), and NOT is input to one input terminal of the closed side AND circuit (3bz).
A low signal is input through the circuit (3b2), and a pulse signal is output from the exclusive OR circuit (3b+).

This pulse signal is input to the flip-flop 70 (3bs) and outputs l-11, and is also input to another flip-flop (3bs) to change the Q output to 1-11 and the Q output to LOW, and further 50 m It is also input to the second one-shot timer (31) 7) and its operation starts from 1;i and the Q output becomes 1-11.

The output of the above flip-flop (3bs) and the output of the 50msec one-shot timer (3b7) are connected to an AND circuit (3h
a), but since both are 1-1i, the corresponding [
The 11th path (3b, ) outputs f-1i to the other input terminal of the open-side AND circuit (3b+) and the other input terminal of the n AND circuits (3b3), respectively.

Therefore, both input terminals of the It side ANC) circuit (3b+) become If i, and the 101 driving transistor (3b
9) to turn it on.

When the open driving transistor (3bs) is turned on, the driving current 1 starts to be applied from the battery (5) which is the driving current to the operating coil (4a) of the latching solenoid (4), which will be described later, and the coil (4a) is energized. The drive current 1 returns to the battery (5) via the open drive transistor (3b9) and the resistor R.

Does this occur in the time driving transistor (31) 9)?
The U voltage is detected by a voltage detection circuit (3bto), and this detected voltage is output to a peak detection circuit (3bu), a margin addition circuit (3b+2), a bottom detection circuit (3b+3), and a margin reduction circuit (3b++).

Also, the Q output of the above flip-flop (3bs) is If
When it reaches i, the peak detection circuit (3bu) starts to output, but since the Q output is OW and it is OW, the bottom detection circuit (3bu) is activated.
The operation of b+3> remains in a stopped state.

On the other hand, when the latching solenoid (4) is energized, as shown in Figure 5, when the operating coil (4a) or the return coil (4b) starts to be energized, the coil When the current is applied, the current increases by one level, and then the current decreases by -1 due to the generation of back electromotive force as the return plunger (4C) moves for a predetermined period of time. Since the electric power becomes 0, the current continues to be constant after that, and the time required for the current to decrease once the current starts to flow and then to start TR again is within about 10 milliseconds at the longest estimate. It turned out to be.

The peak detection circuit (3bn) 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 peak detection ON comparator (3b+s).

The peak detection ON comparator (3b+s) is a margin adding Q circuit (3b
+2) and the output obtained from the circuit (3b+z
) becomes smaller than the current maximum 1, at which point it is output to clear the flip-flop (3be). .

When the clear of flip-flop (3b6) is input,
Q output becomes LOW and peak detection circuit (3bu) n
At the same time, the 0 output becomes II i and the bottom detection circuit (3b+3) starts driving.

The bottom detection circuit (31113) tracks a low voltage t-1, and detects the current minimum value when the valve part (4d) is in the flow mode, that is, the back electromotive force is 0, and detects the current minimum value as the bottom detection circuit. Output to ON comparator (3b+s).

The bottom detection ON comparator (3b+s) is a margin subtraction circuit (3b
+4) and the output from the circuit (3b1
When the output obtained from 4) increases beyond the current minimum value, at that point the output will be output to the 7 flip 0 knob (3bs) clear. When the 1° flip 70 knob (3bs) clear is input, the output will go LOW. AND circuit (3b
s ) to the open side AND circuit (3b, ) for open drive] - The transistor (3b9) becomes OFF state and stops the supply of drive current 1 from the battery (5) to the operating coil (4a). do.

It should be noted that while the opening drive transistor (3bs) is in the ON state, the margin trimming circuit (3bs) may fail due to some abnormality.
There may be cases where the output obtained from the circuit (b+t) does not exceed the current maximum value or the output obtained from the margin reduction circuit (3b+4) does not exceed the current minimum value, and in these cases, the flip-flop (3bs)
Since there is no input for clearing, the 1-transistor (3bq) for driving 611 remains ON, and the power is not stopped from being distributed from the battery (5) to the operating coil (4a), and the current is turned off.

However, even if such an abnormal condition occurs, the non-shot timer (3-by) times out for 50 m seconds in 50 rn seconds after the input to the water supply control unit (3b) becomes Hi, and the Q output becomes LOW. AND circuit (3ba)
Since the output from
) to the working coil (4a), and since the Q output becomes 11, the output from the NAND AND circuit +7) goes low and the non-operating lamp (31) +s) is turned on. inform the person of the abnormal condition.

Then, a pulse signal is generated by the output from the shift register (3a+s) from the 1-pulse circuit (3a+6), and this pulse signal causes the flip
When the output from 1-11 to the water supply control unit (3b) is switched from 1-11 to Low, low is input to one input terminal of the open AND circuit (3b+), and the output from the closed AND circuit (3b
When 1''1 is input to one input terminal r of 3) through the N07 circuit (3112), the exclusive OR circuit (3
From t14) slip 1] Tsubu (3b5) (3
b6) and 50771 seconds one-timer (3b
Pulse ki is output to 7).

Therefore, both input terminals of the 111 side AND circuit (3b3) become 1-11, and ■driving river transistor (3bl!3
) to turn it on.

When the closing drive transistor (3b19> is turned on), the electric current I starts flowing from the battery (5) to the return coil (4b) of the latching solenoid (/l), which will be described later.

After that, the open drive transistor (3b9)
Similarly, the peak detection circuit (3bn) calculates 1(return)il(
The current maximum value obtained by applying current to 4b) and the margin addition output obtained by lr/from the margin addition circuit (3btz) are connected to a peak detection ON comparator (3b+s).
When the margin addition output exceeds the current maximum value and becomes smaller, 11! Flip-flop (3bs
), and then the bottom detection circuit (3bM) clears the valve part (
Compare the current minimum value obtained in the m valve part in 4d) and the margin subtraction output obtained from the margin subtraction 101 path (3b+4) using the comparator for voltage detection ON (3b+6), and if the margin subtraction output is the current minimum When the value exceeds the value, at that point the flip 70 knob (3bs) is cleared and the open driving transistor (3b+s) is brought into the 01:F state, thereby reducing the driving current from the battery (5) to the return coil (4b). Stop energizing l by +1.

A time chart 11 of the water supply control unit (3b) that refuses the request is shown in FIG.

The latching solenoid (4) is connected to the operating coil (4a) and the return coil (4b) as shown in Figs. 7 and 8.
fl'l, the plunger p (4C) is moved downward in V to open and close the valve part (4d). ) Baito hole (4f) drilled in the center of
The valve part (4d) is opened and closed to open and close the diaphragm (4d).
By letting water in and out of the pressure chamber (4g) formed behind C), the diaphragm (4e) is moved upward and the lower surface of the diaphragm (4C) is opened as a valve! (4h), and opens and closes the main valve (41) to supply flush water to the urinal (1a).

The operating coil (4a) and return coil (4b) are gold I! They are stacked vertically in a case (4j) made of
A metal head (4k) is inserted inside these coils (4a) and (4b), and the upper part of the head (4k) is fixed to the case (4h), and the lower part of this head (4k) is A plunger (4C) is provided.

The plunger (4C) is disposed within the return coil (4b) so as to be movable up and down, and the plunger (4C) is placed above the return coil (4b).
Spring (4) that always presses the valve in the valve closing direction, that is, downward.
), and a permanent magnet (4m) is placed on the outer periphery of the plunger (4C) in contact with the lower surface of the case (4j).

To explain the operation of the latching solenoid (4), when a user is not detected, the plunger (4c) is pressed downward by the spring (4) to open the pilot hole (4f). When the base is opened, the magnetic flux of the permanent magnet (4m) at this time works in the direction of attracting the plunger ↑/(4C), and the hole (4) is on the bottom surface of the plunger (4c). The main valve (
4e) keeps the valve closed.

If current is applied to the working coil (4a) in this state, a magnetic flux will be generated that tries to attract the plunge t/(4c) upward, and this magnetic flux will gradually become stronger and, for example, will cause the first working coil (4a) to The plunger (4c) begins to move upward within about 10 msec after the power starts, generating a back electromotive force, and
The blocked pilot hole (4f) becomes m10147(4d)/)'filtt, and the counter electromotive force becomes O. When the valve part (4d) opens, the pilot hole (4[
) water in the pressure chamber (4g) is discharged to the secondary side for tJl,
The main valve (41) opens when the lower surface of the diaphragm (4o) separates from the valve seat (4h).

After that, the plunger (4C) continues to move and compresses the nospring (4), and finally plunges jl (4C).
The upper surface of the head (4k) comes into contact with the lower surface of the head (4k), and the back 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 (4n+), passes through the case (4j>, head (4k), and plunger (4C), and returns to the inside of the permanent magnet (4m). p(4c) remains attracted to the head (4k), that is, maintains the valve open state shown in FIG.

In addition, in order to change the valve from the open state to the closed state again, when the return coil (4b) is energized, a magnetic flux is generated in the opposite direction to the magnetic flux circulation path of the permanent magnet (4m), and this magnetic flux gradually becomes stronger. 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 plunger 1/(4C) downward, generating a back electromotive force and causing the plunger (4C) to move downward. The bottom surface has a pilot hole (
4f) is opened, the valve portion (4d) is closed, and the counter electromotive force becomes O. When the valve part (4d) opens, water on the next side flows into the pressure chamber (4g) through the small hole (4n) drilled on the outer circumferential side of the diaphragm (4C), and the water supply pressure causes the diaphragm (4e) to flow into the pressure chamber (4g). When the lower surface of the main valve (41) is seated on the valve seat (4h), the main valve (41) opens and enters the state shown in FIG.

Note that in step b of this embodiment, the user stands in front of the urinal (1a) and supplies water to the urinal (1a) after a predetermined time has elapsed, and continues supplying water until the bacteria used have left and the predetermined time has elapsed. The urine Z (1a) was washed using the method, but the method is not limited to this, for example,
When a user stands in front of the urinal Z (Ia), water is supplied to the urinal (1a) after a predetermined time for pre-cleaning, and after the user leaves, water is supplied for a pre-determined period of time for post-cleaning? ′? It's better to do 1.

Previously: When the human body detection control unit (3a) does not detect a user, it emits infrared rays at a period of 2 seconds, for example, and the 1IIi and water supply control unit (3b) that detect the user
When outputting 1-11, hit! 5. The opening cycle of the lapping solenoid (4) 115 is set to emit infrared light at a cycle of, for example, 1 second, but is not limited to this. 2 seconds, and the light emitting time 1] for use saving and non-detection and when the wrapping solenoid (4) is opened may be set to 2t and 2 seconds.

Furthermore, since the device shown in FIG. 9 does not show other embodiments, this device is constructed using a microcomputer (3a2o) as a part of the human body detection control section (3a).

The microcomputer (3a same) is conventionally well known.
Input boat (3a2+), CPLI (3a22
).

RAM (3a23), ROM (3a24),
It consists of a timer (3a25) and an output boat (3a2 [i>), and the ROM (3a2<> has a CPLI (3a2
2) is loaded with a program that controls the CPU.
(3a22) is input board (3a22) according to this program.
a2+) or import external data from RAM (
3a23) and timer (3a25), and outputs the processed data as necessary to the output capo-h (302B), and further outputs the processed data to the output capo-h (302B). ) to High or OW.

The output port (3a28) is connected to the microcomputer (3a?o) by the signal given from the CPU (3a22).
A pulse signal is output to the externally connected light emitting drive circuit (3as) to start the measurement from 1 onwards, and when this measurement end signal is input to the input port (3a2+), the light emitting drive circuit (3as) is output again. A pulse signal is continuously transmitted at a period of 11112 or t to cause the light emitting element (2a) to emit infrared rays.

A light receiving element (2b) based on the light emitted from this light emitting element (2a)
The reflected light self-illumination determination circuit (3a+7>) detects the presence or absence of light reception through the light reception amplifier circuit (3as), and takes this detection data into the input port (3a2+).

Also, Kapo-h (3a21) is CPLJ (3a22)
), the microcomputer (3
aoka) Detection count setting circuit connected to the outside (3a+2)
The detection count setting value set in advance is taken in from the output count setting circuit (3a+s), and the output count setting value set in advance is taken in from the output count setting circuit (3a+s).

A flow chart of the program stored in the ROM (3a2s) is shown in Figures 10(a) and 10(b).
), and the flow of the program will be explained according to this.

When the program starts at 1-, the microcontroller first sets the timer (3a25) to star 1- at the light emitting period of 2t.
(3a+2), detection runt setting circuit (3a+2
) to enter the detection power run 1-setting value, e.g.
Step ■) to store it in the RAM at address E (3a23)
, enter the detection count value l) CN 1st RA
Set the contents of M (3a23) to O and step ■), output count setting value from output count setting circuit (3a+a),
For example, enter 4 and enter the RAM at address 03ET (3a23).
Step ■) and enter the output count value to 0C.
Set the contents of the RAM (3a23) at address N1 to 0 (Step ■), then turn off the output to the water supply control unit (3b) and output LOW (Step ■), and set the output state to the RAM (3a23) at address 0FLAG to OFF. The initial state is completed by memorizing step (2) and turning off the measurement start to the light projection drive circuit (3as) (step (2)).

Next, check the timer (3as) (step ■),
Determine whether or not the timer (3a75) has passed 2 (step ■), and when the timer (3a75) has passed 2, set the measurement start output to O.
As N, a pulse signal is output to the light projection drive circuit (3as) (step 2).

Check the end of measurement input (Step 0), determine if there is any input (Step ■), and if there is human power, turn off the measurement star 1 output (Step ■), and check the output from the reflected light presence/absence determination circuit (3a+7). Steps to input ■
), and determine whether there is reflected light (step ■).

If the bacteria used is detected and there is reflected light, the timer (3a
Step ■) to change the light emitting period of δ) from 2t to t.
Add 1 to the detection power run 1-set at address DCN'r (step 2), check the output status of ground to OFL 8G (step 0), and check 11i to see if there is a horn (step Q).

In this case, since the output remains OFF in Stella 1 (2), the result is NO, and it is determined whether the output is 0 (Step 0).

In this case, the detection count value is 1 to 4 in step ■ above, so the answer is No, and the program step returns to ■.
Returning to step 2, the process from ① to 0 is repeated, and the detection count value is increased by 1 each time step ② is passed.

On the other hand, when the user leaves and the reflected light disappears, the condition of No is established in step (■), and the process proceeds to step @.

Here, the detection count value at address DCNT7ti and the detection count setting position at address DSET are read and compared.

When it is determined that the detection count value is not larger than the detection count setting value 2 (step [phase]), the detection count value at the DCNT address is set to O (step), and the program step returns to 0 again. Proceed to step 0, but the detection count value is O in the above step, so select YES in step 0.
When the condition is met, proceed to step ■ and start the timer (3az).
The light emission period of is changed from t to 2t, and the subsequent steps of the program return to step 3 again.

On the other hand, when it is determined that the detected count value is larger than the detected jJ count set value 2 in step 2, the output to the water supply control unit (3b) is switched from OFF to ON and switched from LOW to 1-11 (step ■), OFL, RAM at address A G (
3a73), the output state is set to ON (step @), and the detected h runt value at the DCN T address is set to 0 (step), and the subsequent steps of 70 grams return to step (2).

In this case, proceed to steps ■～■, but at this point
Even if there is no light, the process proceeds through steps [phase] - [phase] - ■, and even if there is reflected light, it proceeds through steps ■ - ■ and eventually proceeds to step ■ -.

In this state, since the output was turned ON in step 0 above, the YES condition is satisfied in step 2, and the process proceeds to step 2, where 1 is added to the output count value at address 0CNT, and OCNCN
Read the hinge force count value and the output count setting value of address 08ET and compare them (Step 2).

When it is determined that the output count value is not larger than the output count setting value 4 (step ■), the process returns to step (2) again and repeats steps (2) to (2), and the output count value is increased by 1 each time it passes through step (2).

Among them, the output count value is the output count setting l114
If it is greater than or equal to, the YES condition is established in step 0, and the process advances to step [phase].

Here, the output to the water supply control unit (3b) is switched from ON to OFF and switched from l-1i to LOW (step @>, 0
Output state fiOFF to RAM (3a23) at FLAG address
, and set the output count value of the OCN address to O (step @). Return to the step again and check the detection count value of the DCNT address to determine whether it is O (step 0). ) detects the user and determines that J3 detection power run 1- is not 0, it returns to step ■ again with the light emitting period of the timer (3a25) set to t, and the detection power decreases when the user leaves. Run;・If the value is determined to be O, the timer (3a25
) change the light emitting period from t to 2t (step [phase]
) and return to step ■ again.

The time chart of the human body detection control unit (3a)
Add to the diagram.

In the above embodiment, the water washer (1) is the urinal (1a).
), but it is limited to this, for example, the first
As shown in Figure 2, the water washer (1) may be a hand washer (1b).

In this case, a sensing part (2) is installed on the rear ground wall (A) of the hand basin (1b), and the sensing part (2) detects when a user approaches the hand basin (1b) to wash their hands. ) is detected,
The water supply section (4) is energized to start supplying water from the water shell (1b+), and when the user leaves the handwashing section 5 (lb) after washing hands, the water supply is stopped.

That is, as shown in FIG.
+3) outputs a LOW to 1]1 output, and the one-shot i-pulse circuit (3a7) without reflected light causes the flip-flop (3a13) to output a LOW output from 1-11.

When outputting from LOW to Hi or from Hl to LOW from this flip 70 knob (3a+:+), the water supply control unit (3a+:+)
b) moves as in the previous embodiment.

Also, when l-1i is being output from the Furigraph [1 knob (3a+1) to the water supply control unit (3b), the Marube plexer (3a3) is switched from the period 2t to the period t, and when it is outputting low. 111]t to JfJ2t.

Furthermore, in the above embodiment, the sensing portion (2) is placed on the wall surface (A).
Although the sensing section (2) is installed in an embedded manner, the structure of the sensing section (2) is not limited to that shown in the drawings and may be mounted in any manner desired.

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

■ By emitting infrared rays intermittently from the light emitting element, we create intermittent non-emitting states that do not consume power, making it possible to detect infrared rays that are different from conventional systems that emit infrared rays several thousand times per second. It is possible to reduce the number of infrared rays emitted without significantly reducing response accuracy compared to those equipped with
In addition to being able to reduce the power consumption, the number of reflected lights received by the light receiving element is counted, and if the counted number is less than a predetermined number and the reflected light disappears, power run 1-dispersion is performed. 0 and outputs a valve opening signal to the water supply section only when the Callan l-number reaches a predetermined number, the water supply section is opened without using a timer, which prevents malfunctions installed in the conventional control section. Compared to a valve that outputs a valve opening signal to the water supply section and opens the valve only when light continues to be received until the timer for the J- function expires, there is no need to energize the malfunction prevention timer, which reduces power consumption accordingly. can do.

Therefore, the '4Q1' of the battery becomes longer and there is no need to replace the battery frequently, which not only provides an economical advantage of greatly reducing costs, but also greatly reduces the time and effort required to replace the battery.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional side view of a water supply control device showing an embodiment of the present invention, Fig. 2 is a block diagram of the human body detection control section, m3
Figure 4 is a block diagram of the water supply control unit, Figure 5 is a graph showing the time vs. current characteristics when the latching solenoid is energized, Figure 6 is a time chart of the water supply control unit, and Figure 7 is the same time diagram. 8 is an enlarged vertical sectional view of the water supply section showing the main valve in the closed state, and FIG. 8 is an enlarged longitudinal sectional view of the water supply section showing the main valve t? tl valve state; FIGS. 9 to 11 show other embodiments of the present invention; FIG. 9 is a block diagram of the human body detection υ control unit; FIGS. 10(a) and 10(1)) 11 is the same time chart, FIG. 12 is a partially cutaway front view showing the case where the water washer is a hand wash, and FIG. 13 is a block diagram of the human body detection control section. 1...Washing+Fj 2...Sensing part 2a...
- Light projecting element 2b... Light receiving element f3... Control section
4... Water supply part 5... Battery

Claims (1)

[Claims] A water washer, a sensing part that senses the use of the water washer, a control part that sends an opening/closing signal to the water supply part based on a sensing signal from the sensing part, and a water supply part 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 sensing section is constituted by an infrared sensor having a light emitting element and a light receiving element, and the infrared light emitted by the light emitting element is emitted intermittently at a predetermined period. The water supply control device is further characterized in that the control section counts the number of reflected lights received by the light receiving element, and outputs a valve opening signal to the water supply section only when the counted number reaches a predetermined number.