JPH07292740A - Automatic flushing device of valve driving device and sanitary ware - Google Patents

Abstract

PURPOSE:To detect the condition of motion of a solenoid opening/closing valve. CONSTITUTION:A microcomputer 21 outputs a valve opening signal O and a valve closing signal C for driving a pilot valve 4a to a valve driving circuit 22. The valve driving circuit 22 makes drive current flow to the pilot valve 4a based on the valve opening signal O and the valve closing signal C, so as to operate the pilot valve 4a to open and close. Nodes N1, N2 on both ends of the pilot valve 4a are earthed through resistances 30, 31, and respectively connected to input ports P3, P4 which are A/D conversion input of the microcomputer 21. The microcomputer 21 A/D-converts the inputs from the input ports P3, P4, and reads the potential (drive voltage) of the nodes N1, N2 changing according to the opening/closing motion of the pilot valve 4a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve drive device and an automatic cleaning device for various sanitary appliances such as flush toilets and washbasins using the valve drive device.

[0002]

2. Description of the Related Art FIGS. 10 and 11 show a state in which a conventional automatic flushing device for a flush urinal for men (hereinafter referred to as a morning glory) is attached.

The morning glory 1 is attached to the front side of the wall surface 2 of the washroom, and the water supply pipe 3 connected to the morning glory 1 has an electromagnetic opening / closing valve 4
Are connected. When the electromagnetic opening / closing valve 4 is opened, washing water is supplied from the water supply pipe 3 to the morning glory 1. On the contrary, when the electromagnetic opening / closing valve 4 is closed, the supply of washing water from the water supply pipe 3 to the bosh 1 is shut off.

The control box 5 is attached to the back side of the wall surface 2 slightly above the morning glory 1, and the surface plate 5a of the control box 5 is exposed on the wall surface 2. The surface plate 5a has a light emitting diode 6a.
A user detection sensor 6 including a phototransistor 6b and a phototransistor 6b is provided, and a controller 7 and a lithium battery 8 are provided in the control box 5.

The light emitting diode 6a projects infrared light having a preset wavelength. The phototransistor 6b outputs a detection signal only when it receives infrared light having the same wavelength as the projected light of the light emitting diode 6a.

FIG. 12 shows an electric block circuit of a conventional morning glory automatic washing device. The lithium battery 8 supplies power to the constant voltage circuit 20 in the controller 7.

The constant voltage circuit 20 is composed of a three-terminal regulator, and has a user detection sensor 6 and a controller 7.
Microcomputer in (2)
1, a stable DC voltage is supplied to each of the valve drive circuit 22, the light emission drive circuit 23, the switch circuit 24, and the condition setting circuit 25.

The microcomputer 21 is a central processing unit (CP
U), a read-only memory (ROM) that stores a control program, a readable and writable memory (RAM) that temporarily stores a result of a user detection operation described later,
It consists of an input / output interface, etc.

The microcomputer 21 is provided with output ports P1 and P2, and the valve drive circuit 2 is provided at the output ports P1 and P2.
2 is connected. The solenoid on-off valve 4 described above is connected to the valve drive circuit 22. The electromagnetic on-off valve 4 is a self-holding solenoid, and is a pilot valve 4a electrically driven by a valve drive circuit 22 and the pilot valve 4a.
The main valve 4b is mechanically driven by a.

The microcomputer 21 outputs a valve open signal O from the output port P1 and a valve close signal C from the output port P2 to the valve drive circuit 22. The valve drive circuit 22 is the microcomputer 21.
The valve open signal O and the valve close signal C input from the are amplified by power and output to the pilot valve 4a. That is, the valve drive circuit 22 supplies a drive current in the direction of arrow A shown in FIG. 12 to the pilot valve 4a when the valve open signal O is input from the microcomputer 21, and outputs a drive current in the direction of arrow B to the pilot valve 4a when the valve close signal C is input. Apply drive current. And
When the valve drive circuit stops inputting both signals O and C, it stops supplying the drive current to the pilot valve 4b.

The pilot valve 4a opens when the drive current flows in the direction of arrow A in the closed state (opening operation), and closes when the drive current flows in the direction of arrow B in the open state (closing operation). The main valve 4b opens according to the opening operation of the pilot valve 4a, and closes according to the closing operation of the pilot valve 4a.

When the main valve 4b is opened, the washing water is supplied from the water supply pipe 3 to the bosh 1 and the main valve 4b is opened.
When is closed, the supply of washing water to the morning glory 1 is stopped. In addition, the microcomputer 21 uses a predetermined detection timing (for example, 1
A light emission command signal F with a predetermined duty (for example, 50%) at a predetermined modulation frequency (for example, several tens KHz) is generated for each predetermined time (for a predetermined number of pulses) for each second (around seconds), and is output to the light emission drive circuit 23. .

Here, as will be described later, the pulse number of the light emission command signal F is set to an appropriate pulse number of 1 pulse or more (for example, 8 pulses) when the user appears before the morning glory 1 or when disturbance light is generated. Become. The modulation frequency of the light emission command signal F is
It is set so that it does not match the lighting frequency of the inverter fluorescent lamp generated in the washroom. For example, when an inverter fluorescent lamp is used for illumination of a washroom, the light from the inverter fluorescent lamp becomes ambient light, and its lighting frequency is set to a certain specified range. Therefore, if the modulation frequency of the light emission command signal F is set so as to deviate from the specified range of the lighting frequency of the inverter fluorescent lamp, it will not match the lighting frequency of the ambient light.

The light emission drive circuit 23 causes the light emitting diode 6a to emit light based on the light emission command signal F from the microcomputer 21. The switch circuit 24 is switched on / off based on a command signal S from the microcomputer 21, and when the switch circuit 24 is on, power from the constant voltage circuit 20 is supplied to the light receiving circuit 26.
When it is off, the power supplied from the constant voltage circuit 20 to the light receiving circuit 26 is shut off. That is, the switch circuit 24 functions as a power switch of the light receiving circuit 26, and the switch circuit 24
When the switch circuit 24 is turned off, the light receiving circuit 26 is turned on. When the switch circuit 24 is turned off, the light receiving circuit 26 is turned off. still,
The command signal S from the microcomputer 21 has a predetermined interval (for example, 1
Since it is output for a fixed time every (around seconds), the switch circuit 24 is also turned on for a fixed time at a predetermined interval to supply power to the light receiving circuit 26. Therefore, the light receiving circuit 26 can be operated by turning on the power for a predetermined time at a predetermined interval.

The light receiving circuit 26 is composed of an amplifier 26a and a waveform shaping circuit 26b. The amplifier 26a amplifies the detection signal of the phototransistor 6b. The waveform shaping circuit 26b integrates the output signal of the amplifier 26a, shapes the waveform, and outputs the waveform-shaped received light signal R to the microcomputer 21.

The detection timing, the modulation frequency, and the duty of the light emission command signal F are set in the condition setting circuit 25, and these settings can be changed. Also,
As a method for changing these settings, for example, a switch (not shown) corresponding to the setting is turned on / off, and a setting is made by the builder at the time of construction of the automatic cleaning device according to the construction site.

The operation of the automatic morning glory washing apparatus will be described. When the user stands in front of the morning glory 1, the light projected from the light emitting diode 6a is reflected by the user. Then, the phototransistor 6b detects the reflected light and outputs a detection signal. The light receiving circuit 26 amplifies the detection signal of the phototransistor 6b by the amplifier 26a, shapes the waveform by the waveform shaping circuit 26b, and outputs the waveform shaped light receiving signal R to the microcomputer 21. On the other hand, when the user is not standing in front of the morning glory 1, the projection light from the light emitting diode 6a is not reflected, and the phototransistor 6b cannot detect the reflected light, so that it does not output the detection signal. R is not output.

Therefore, the microcomputer 21 can detect whether or not the user is standing in front of the morning glory 1 based on the light receiving signal R output from the light receiving circuit 26. Then, the microcomputer 21 determines that the user is "detected" if the user is standing, and "not detected by the user" if the user is not standing,
The judgment result is stored in the RAM. Hereinafter, a series of operations of the microcomputer 21 will be referred to as a user detection operation.

This user detection operation is performed for a fixed time (for example, 1
Every second). Then, the microcomputer 21 controls the valve drive circuit 22 based on the present determination result and the previous determination result stored in the RAM.

That is, the previous determination result is "user not detected".
If the current determination result is "user detection", the microcomputer 21 determines that the user has appeared before the morning glory 1 and
Perform the pre-cleaning process. That is, the microcomputer 21 controls the valve drive circuit 22 to open the electromagnetic on-off valve 4 for a certain period of time to supply a certain amount of washing water from the water supply pipe 3 to the morning glory 1 to wash the morning glory 1. As a result, the morning glory 1 is free from stains and odors, so that the user can comfortably add small amounts and the morning glory 1 is less likely to get dirty.

Subsequently, the previous determination result is "user detection".
Then, when the present determination result is "user non-detection", the microcomputer 21 determines that the user who has finished adding the small amount has left the morning glory 1 and performs the post-washing process of the morning glory 1. That is, the microcomputer 21 controls the valve drive open circuit 21 to open the electromagnetic on-off valve 4 for a certain period of time to supply a certain amount of cleaning water from the water supply pipe 3 to the morning glory 1 to clean the morning glory 1.

As described above, in the conventional morning glory automatic washing device, when the user who wants to take a small amount of clothes stands in front of the morning glory 1, the morning glory is cleaned (pre-cleaning process) and the small amount of makeup is finished. When the user walks away from the front of the morning glory 1, the morning glory 1 is washed again (post-cleaning process).

[0023]

By the way, the microcomputer 2
1 outputs the valve open signal O and the valve close signal C,
It was not possible to detect whether or not the pilot valve 4a has actually completed the opening or closing operation. for that reason,
The microcomputer 21 obtains the actual opening / closing time of the pilot valve 4a by performing an experiment on the valve opening signal O and the valve closing signal C in advance, and a sufficiently long time (for example, 20
Both signals O and C were output only for ms). Therefore, the time from the actual completion of the opening / closing operation of the pilot valve 4a until the output of both signals O and C is stopped becomes an unnecessary output, which hinders the reduction of power consumption.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a valve drive device capable of detecting the completion of operation of an electromagnetic opening / closing valve. Another object is to provide an automatic washing device for sanitary ware using such a valve drive device.

[0025]

According to a first aspect of the present invention, there is provided an electromagnetic opening / closing valve, valve drive control means for opening / closing the electromagnetic opening / closing valve, and drive varying according to the opening / closing operation of the electromagnetic opening / closing valve. The gist of the present invention is to include a voltage detection unit that detects a voltage and an operation detection unit that detects completion of the opening / closing operation of the electromagnetic opening / closing valve based on the drive voltage detected by the voltage detection unit.

The invention according to claim 2 is a solenoid on-off valve,
Valve drive control means for opening and closing the electromagnetic on-off valve, current detecting means for detecting a current that changes according to the opening and closing operation of the electromagnetic on-off valve, and the electromagnetic opening and closing based on the current detected by the current detecting means. The gist of the present invention is to provide an operation detecting means for detecting the completion of the opening / closing operation of the valve.

The invention according to claim 3 is a solenoid on-off valve,
Valve drive control means for opening and closing the electromagnetic on-off valve, level range detecting means for detecting a level range of the drive voltage that changes according to the opening and closing operation of the electromagnetic on-off valve, and level detected by the level range detecting means. The gist of the present invention is to include operation detecting means for detecting completion of the opening / closing operation of the electromagnetic opening / closing valve based on the range.

According to a fourth aspect of the present invention, in the valve drive device according to any one of the first to third aspects, when the electromagnetic opening / closing valve does not complete the opening / closing operation, the electromagnetic opening / closing valve is out of order. The gist is that it is provided with a judging means for judging that the above-mentioned is and a display means for displaying a failure based on the judgment result of the judging means.

According to a fifth aspect of the present invention, the valve drive device according to the fourth aspect, a sanitary appliance, a user detecting means for detecting a user of the sanitary appliance, and a detection result of the user detecting means. By controlling the valve drive device based on
The gist of the present invention is to provide a supply control means for supplying the cleaning body to the sanitary equipment for a predetermined time.

[0030]

Therefore, according to the first aspect of the present invention, the voltage detecting means detects the driving voltage which changes according to the opening / closing operation of the electromagnetic opening / closing valve, and the operation detecting means inputs the driving voltage to the electromagnetic opening / closing. Since the completion of the opening / closing operation of the valve is detected, it is possible to reliably detect the completion of the opening / closing operation of the electromagnetic opening / closing valve.

According to the second aspect of the present invention, the current detecting means inputs a current that changes according to the opening / closing operation of the electromagnetic opening / closing valve, and the operation detecting means inputs the current to input the current. Since the completion of the opening / closing operation is detected, it is possible to reliably detect the completion of the opening / closing operation of the electromagnetic opening / closing valve.

According to the third aspect of the invention, the level range detecting means detects the level range of the drive voltage which changes according to the opening / closing operation of the electromagnetic opening / closing valve, and the operation detecting means inputs the level range. Thus, the completion of the opening / closing operation of the electromagnetic opening / closing valve is detected, so that the completion of the opening / closing operation of the electromagnetic opening / closing valve can be reliably detected.

According to the invention of claim 4, the judging means judges the failure of the electromagnetic on-off valve based on the detection result of the operation detection result, and the display means displays the failure based on the judgment result. By doing so, it is possible to easily detect the failure of the electromagnetic opening / closing valve.

According to the invention described in claim 5, the valve drive device according to claim 4 surely detects the completion of the operation of the electromagnetic on-off valve for supplying the cleaning body to the sanitary ware, and the electromagnetic on-off valve is operated. When there is a failure, the failure is displayed on the display means, so that the failure of the electromagnetic on-off valve can be easily confirmed.

[0035]

【Example】

(First Embodiment) A first embodiment in which the present invention is embodied in an automatic washing device for a flush urinal for men (hereinafter referred to as a morning glory) will be described with reference to the drawings. The same components as those of the related art are designated by the same reference numerals, and the description thereof is partially omitted.

As shown in FIG. 2, an LED 9 for display is provided on the surface plate 5a. FIG. 1 shows an electric block circuit of the automatic cleaning apparatus of this embodiment. Two counters K1 and K2 are provided in the microcomputer 21 by software.

The LED 9 is connected to the microcomputer 21, is normally turned off, and is turned on based on a command signal from the microcomputer 21. The nodes N1 and N2 at both ends of the pilot valve 4a are grounded via resistors 30 and 31, respectively. The resistors 30 and 31 are high in resistance, respectively, and the driving current flowing through the resistors 30 and 31 is reduced.

The valve drive circuit 22 power-amplifies the valve open signal O and the valve close signal C input from the microcomputer 21, and outputs the power amplified signal to the pilot valve 4a. That is, the valve drive circuit 22
When the valve open signal O is input from the microcomputer 21, the pilot valve 4a moves from the node N1 to the node N2.
When a valve closing signal C is input to the pilot valve 4a, a drive current is supplied to the pilot valve 4a from the node N2 to the node N1.

Therefore, as shown in FIG. 3, the potentials (driving voltages) of the nodes N1 and N2 are in the operation of the pilot valve 4a while the valve open signal O and the valve close signal C are output from the microcomputer 21. The potential becomes accordingly.

The potential of the node N1 (N2) changes according to the operation of the pilot valve 4a, as shown in FIG. That is, when the pilot valve 4a starts the opening (closing) operation, the potential of the node N1 (N2) rises to a predetermined value, and the potential drops as the pilot valve 4a opens (closes). And the pilot valve 4a
When the opening (closing) operation is completed, the potential of the node N1 (N2) rises again. After that, the potential of the node N1 (N2) becomes lower than that when the opening (closing) operation is completed. The inflection point at which the potential of the node N1 (N2) changes from falling to rising is defined as the operating point D1 of the pilot valve 4a. Also, after passing through the operating point D1 of the pilot valve 4a, the inflection point at which the potential of the node N1 (N2) changes from rising to falling again is the operating point D of the pilot valve 4a.
Set to 2. This operating point D2 is the point where the opening (closing) operation of the pilot valve 4a is completed. Therefore, it is possible to detect the completion of the opening (closing) operation of the pilot valve 4a by sequentially detecting the operating points D1 and D2 of the pilot valve 4a.

The nodes N1 and N2 are connected to the input ports P3 and P4 of the microcomputer 21, respectively. Both input ports P3 and P4 have analog-digital conversion (A /
D conversion) input, and the potentials input to the ports P3 and P4 are A / D converted in the microcomputer 21 at predetermined monitor intervals (for example, 0.1 ms). That is, the microcomputer 2
Reference numeral 1 inputs the potentials of the nodes N1 and N2 from the input ports P3 and P4, respectively, and A / D-converts the input potentials at predetermined monitor intervals.

The microcomputer 21 detects the completion of the opening / closing operation of the pilot valve 4a based on the potentials of the nodes N1 and N2. Further, the microcomputer 21 is adapted to turn on the LED 9 based on the detection result of the operation of the pilot valve 4a.

In the condition setting circuit 25, in addition to the conventional setting, the above-mentioned monitor interval and monitor limit counts T1 and T2 described later are set. The monitor interval and the monitor limit counts T1 and T2 can be changed in the same manner as the conventional setting, and can be changed by turning on / off the corresponding switches (not shown).

Next, the opening operation of the pilot valve 4a in the pre-washing process for the morning glory 1 when the user stands in front of the morning glory 1 will be described with reference to the flowchart shown in FIG. First, the microcomputer 21 performs steps (hereinafter, simply referred to as S)
At 1, the counters K1 and K2 are cleared.

At S2, the microcomputer 21 outputs a valve open signal O to the valve drive circuit 22. The valve drive circuit 22 receives the valve open signal O and supplies a drive current to the pilot valve 4a from the node N1 to the node N2. Then, the pilot valve 4a starts the opening operation according to the driving current flowing therethrough.

Next, in S3, the microcomputer 21 inputs the potential of the node N1 through the input port P3, reads the potential as the value ADK1 obtained by A / D conversion corresponding to the counter K1, and stores it in the RAM. This A / D conversion is performed at each monitor interval described above. Therefore, the microcomputer 21 inputs the potential of the node N1 at every monitor interval and moves to S4.

In S4, the microcomputer 21 compares the value ADn + 1 read this time with the value ADn read last time stored in the RAM. When the value ADn + 1 is smaller than the value ADn, the potential of the node N1 is falling. At this time, the microcomputer 21 determines that the pilot valve 4a
Is determined not to have reached the operating point D1 yet. Then, the microcomputer 21 counts up the counter K1 in S5.

At S6, the microcomputer 21 compares the counter K1 with the monitor limit count T1. The monitor limit count T1 is a preset time (for example, 20 m
During s), the number of times the microcomputer 21 performs A / D conversion at each monitor interval is set. Normally, pilot valve 4
The point a reaches the operating point D1 within 20 ms after starting the opening (closing) operation. Conversely, if the pilot valve 4a does not reach the operating point D1 even after 20 ms have passed since the opening (closing) operation was started, it means that the pilot valve 4a is out of order. That is, the microcomputer 21 can determine whether or not the pilot valve 4a is out of order by comparing the counter K1 and the monitor count T1.

When the counter K1 is smaller than the monitor limit count T1, the microcomputer 21 returns to S3 and performs A / D conversion. The A / D conversion is performed at each monitor interval described above. Therefore, the microcomputer 21 performs S at every monitor interval.
The value ADn + obtained by A / D conversion by repeating the processing from 3 to S6
1 is the value A previously A / D converted and stored in RAM
It is determined whether it is smaller than Dn. That is, S3 to S6
By the processing of (1), the microcomputer 21 detects the minimum value of the potential of the node N1 which changes according to the opening operation of the pilot valve 4a.

In S4, the value ADn + 1 is the value ADn
If it is larger, the microcomputer 21 proceeds from S4 to S7.
That is, the value ADn becomes the minimum value, and the microcomputer 21 determines that the pilot valve 4a has reached the operating point D1.

Similar to S3, S7 is a signal input means, and the microcomputer 21 receives a signal from the node N via the input port P3.
The potential of 1 is input, and the potential is read as the value ADK1 obtained by A / D conversion corresponding to the counter K1 and stored in the RAM.

In S8, the microcomputer 21 compares the value ADn + 1 read this time with the value ADn read last time and stored in the RAM. The value ADn + 1 is the value A
If it is larger than Dn, the potential of the node N2 is rising again. At this time, the microcomputer 21 determines that the pilot valve 4a has not yet reached the operating point D2. Then, in S9, the microcomputer 21 causes the counter K
Count up 2.

At S10, the microcomputer 21 compares the counter K2 with the monitor limit count T2. The monitor limit count T2 is a preset time (for example, 10 m
During s), the number of times the microcomputer 21 performs A / D conversion at each monitor interval is set. Normally, pilot valve 4
a is the operating point D within 10 ms after passing the operating point D1
Reach 2. In other words, even if 10 ms have passed since the operating point D1 was passed, the pilot valve 4a operates at the operating point D2.
Is not reached, the pilot valve 4a is out of order. That is, the microcomputer 21 uses the counter K2
It is possible to judge whether or not the pilot valve 4a is out of order by comparing with the monitor count T2.

When the counter K2 is smaller than the monitor limit count T2, the microcomputer 21 returns to S7 and performs A / D conversion. As described above, the A / D conversion is performed at every monitor interval. Therefore, the microcomputer 21 repeats the processing from S7 to S10 at each monitor interval and determines whether the A / D converted value ADn + 1 is larger than the value ADn previously A / D converted and stored in the RAM. . That is, S
By the processing from 7 to S10, the microcomputer 21 operates at the operating point D1.
After that, the maximum value of the potential of the node N1 that changes according to the opening operation of the pilot valve 4a is detected.

On the other hand, if the value ADn + 1 becomes smaller than the value ADn in S8, the value ADn becomes the operating point D1.
It becomes the maximum value after that. Therefore, when the microcomputer 21 detects the value ADn, the pilot valve 4
It is determined that the opening operation of a is completed.

Then, in S11, the microcomputer 21 provides a time lag for waiting until a fixed time (for example, 2 to 3 ms) elapses.
Move on to. Actually, the pilot valve 4a has an operating point D2.
Since the opening operation is completed at, the output of the valve opening signal O may be stopped when the operating point D2 is reached without providing a time lag. However, by providing the time lag, the opening operation of the pilot valve 4a can be more surely completed. In the present embodiment, the time for outputting the valve opening signal O is shorter (about 15 ms) than the conventional example even if the time lag is included, so that there is no hindrance to the reduction in power consumption.

At S12, the microcomputer 21 stops outputting the valve open signal O to the valve drive circuit 22. When the valve drive circuit 22 stops inputting the valve open signal O, it stops supplying the drive current to the pilot valve 4a. As a result, the opening operation of the pilot valve 4a is completed.

By the way, in S6, the counter K1 may become larger than the time limit count T1, that is, the potential of the node N1 may not become the minimum even when 20 ms has elapsed after the output of the valve opening signal O was started. Also, S1
At 0, the counter K2 becomes larger than the time limit count T2, that is, the pilot valve 4a operates at the operating point D.
There are cases where the potential of the node N1 does not reach the maximum even after 10 ms has passed after passing 1. In these cases, the microcomputer 21
Outputs a valve open signal O, and the pilot drive circuit 22 sends a drive current to the pilot valve 4a even if the pilot valve 4a
Does not open, that is, the pilot valve 4a is out of order. At this time, the microcomputer 21 determines that the pilot valve 4a is out of order, moves to S13, sets an alarm flag, and moves to S12.

The microcomputer 21 turns on the LED 9 based on the alarm flag set in S13. That is, when the alarm flag is set in the valve opening operation or the valve closing operation, the microcomputer 21 lights up the LED 9 to indicate that the electromagnetic opening / closing valve 4 is out of order.

The closing operation of the pilot valve 4a in the pre-cleaning process is performed by the valve opening signal O in S2 and S8.
The operation can be confirmed by substituting the valve closing signal C for AD conversion of the drive voltage of the input port P4 in place of the drive voltage of the input port P3 in S3 and S5, and therefore the description thereof is omitted. As described above, the main valve 4b is mechanically driven by the pilot valve 4a, and the opening / closing operation of the electromagnetic opening / closing valve 4 is performed. The opening / closing operation of the electromagnetic on-off valve 4 in the post-cleaning process when the user leaves the morning glory 1 is the same as the above-mentioned pre-cleaning process, and therefore the description thereof is omitted.

As described above, in this embodiment, the microcomputer 21 is provided with the input ports P3 and P4 which are A / D conversion inputs, and the pilot valve 4a and the valve drive circuit 22 are connected via the input ports P3 and P4. The potentials of the nodes N1 and N2 between them are input. The potentials of the nodes N1 and N2 change according to the opening (closing) operation of the pilot valve 4a. The microcomputer 21 A / D-converts the potentials of the nodes N1 and N2 at predetermined monitor intervals, and stores the A / D-converted value ADn + 1. Then, the microcomputer 21 A / D converted value AD
By comparing n + 1 with the value ADn stored by A / D conversion last time, the inflection point (operating point D where the potentials of the nodes N1 and N2 rise from falling due to the opening (closing) operation of the pilot valve 4a (operating point D
After detecting 1), the inflection point (operating point D)
2) was detected. As described above, this operating point D2 is the point where the opening (closing) operation of the pilot valve 4a is completed.

As a result, it is possible to reliably detect the completion of the opening (closing) operation of the pilot valve 4a. In addition, the inflection point of the potentials of the nodes N1 and N2 (operating point D
1, D2) cannot be detected, the microcomputer 21 determines that the pilot valve 4a is out of order and turns on the LED 9. As a result, it is possible to easily confirm the failure of the pilot valve 4a. (Second Embodiment) Next, a second embodiment in which the present invention is embodied in an automatic washing machine for morning glory will be described. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 6, the valve drive circuit 22 is grounded via the resistor 32. Valve drive circuit 22 and resistor 3
The node N3 between 2 and the input port P5 of the microcomputer 21
It is connected to the.

The resistor 32 has a low resistance and reduces the influence on the driving ability of the pilot valve 4a. When the valve drive circuit 22 receives the valve open signal O from the microcomputer 21, the valve drive circuit 22 supplies a drive current to the pilot valve 4a. The drive current flows to the ground via the resistor 32. Further, when the valve drive circuit 22 receives the valve closing signal C from the microcomputer 21, the valve drive circuit 22 supplies a drive current to the pilot valve 4a. The drive current flows to the ground via the resistor 32. Therefore, the node N3 has a potential corresponding to the drive current flowing according to the operation of the pilot valve 4a, and the microcomputer 21 can detect the change in the drive current flowing through the pilot valve 4a by inputting the potential of the node N3.

That is, as shown in FIG. 7, when the valve drive circuit 22 supplies a drive current to the pilot valve 4a, the potential of the node N3 is initially increased by the opening (closing) operation of the pilot valve 4a. Then, the potential of the node N3 temporarily decreases when the pilot valve 4a completes the opening (closing) operation. The microcomputer 21 detects an inflection point (operating point D3) at which this drive current decreases from an increase.

After that, the drive current flowing through the pilot valve 4a increases. The microcomputer 21 detects an inflection point (operating point D4) where this drive current increases from a decrease. This operating point D4 is when the opening (closing) operation of the pilot valve 4a is completed.

Therefore, in the microcomputer 21, the node N
Completion of the opening (closing) operation of the pilot valve 4a can be detected by A / D converting the potential of 3 at every monitoring interval.

As described above, in this embodiment, instead of detecting the change in the potentials of the nodes N1 and N2 between the pilot valve 4a and the valve drive circuit 22 in the first embodiment, the pilot valve 4a is replaced by the pilot valve 4a. The change of the driving current flowing is detected. Since the inflection point where the drive current increases from the decrease is detected to detect the completion of the opening (closing) operation of the pilot valve 4a, the opening (closing) of the pilot valve 4a is performed as in the first embodiment. ) It is possible to reliably detect the completion of the operation. Third Embodiment Next, a third embodiment in which the present invention is embodied in an automatic morning glory washing device will be described. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 8, the node N1 is connected to the plus input terminal of the comparator 40, and the node N2 is connected to the plus input terminal of the comparator 41. Reference voltages V1 and V2 are applied to the negative input terminals of the comparators 40 and 41, respectively, and the output terminals are the microcomputer 2
1 input ports P6 and P7, respectively.

The reference voltages V1 and V2 are generated by dividing the power source supplied from the constant voltage circuit 20. Further, as shown in FIG. 9, the reference voltages V1 and V2 are set to a potential higher than the potential when the pilot valve 4a is at the operating point D1 and lower than the potential when the pilot valve 4a is at the operating point D2 in the first embodiment. Has been done. As a result, the comparator 40,
The output of 41 is that the potential of the nodes N1 and N2 is the reference voltage V1,
When it is higher than V2, it becomes H level, and conversely nodes N1 and N
When the potential of 2 is lower than the reference voltages V1 and V2, it becomes L level.

Therefore, the pilot valve 4a is opened (closed).
When the operation is started, the outputs of the comparators 40 and 41 are H level.
It becomes a level. Next, the pilot valve 4a moves to the operating point D.
When it is near 1, the outputs of the comparators 40 and 41 are at the L level. Then, the pilot valve 4a is opened (closed)
When the operation is completed, the outputs of the comparators 40 and 41 are H level.
It becomes a level.

That is, the microcomputer 21 outputs the valve open signal O (valve close signal C) and then the input port P6 (P7).
Signal input to H level → L level → H level → L
Pilot valve 4a opens (closes) when the level is reached
It can be determined that the operation is completed.

On the contrary, after the microcomputer 21 outputs the valve open signal O (valve close signal C), the input port P6 (P7)
There is a case where the signal input to is left at H level.
This is the case where the pilot valve 4a has not reached the operating point D1. In addition, the signal input to the input port P6 (P7) may change from H level to L level and remain at L level. This is the pilot valve 4
a is the case where the operating point D1 has not been reached or the operating point D1 has not reached the operating point D2. Further, the signal input to the input port P6 (P7) may change from H level → L level → H level and remain at H level. This is the case where the pilot valve 4a has not reached the operating point D2. In these cases, it can be determined that the pilot valve 4a has not completed the opening (closing) operation.

As described above, in this embodiment, the comparators 40 and 41 are provided, and the microcomputer 21 is connected to the node N1.
The result of comparing the potential of N2 and the reference voltages V1 and V2 is input. Therefore, the microcomputer 21 can detect the completion of the opening (closing) operation of the pilot valve 4a by inputting the voltage level according to the operation of the pilot valve 4a, and the inflection as in the first and second embodiments. Since it is not necessary to detect the point, the completion of the opening and closing operations of the pilot valve 4a can be detected more easily than in the first and second embodiments.

The above embodiments may be modified as follows, and in that case, the same operation and effect can be obtained. 1) In the first embodiment, the nodes N1 and N2 are connected to the input port P3 via an analog switch. And
The analog switch is switched by the valve open signal O to connect the input port P3 and the node N1, and the valve close signal C
To switch the analog switch to connect the input port P3 and the node N2. With this configuration, in the opening operation and the closing operation of the electromagnetic opening / closing valve 4, the microcomputer 21 inputs only from the input port P3, which simplifies the operation.

In the third embodiment, the node N1,
N2 is connected to the positive input terminal of the comparator 40 via an analog switch. Then, the valve open signal O switches the analog switch to connect the comparator 40 and the node N1, and the valve close signal C switches the analog switch to connect the comparator 40 and the node N2. With this configuration, it is not necessary to provide the comparator 41, and the configuration can be simplified.

2) In the second embodiment, a current sensor is provided instead of the resistor 32, and the drive current flowing through the pilot valve 4a is directly detected by the current sensor. 3) Replace the lithium battery 8 with a DC power supply device and supply power from a commercial power supply.

4) The constant voltage circuit 20 is omitted. 5) The valve drive circuit 22 is directly supplied with power from the lithium battery 8. 6) Use visible light or ultraviolet light instead of infrared light. That is, not the infrared light but the visible light or the ultraviolet light is projected from the light emitting diode 6a, and the phototransistor 6b receives the projected light to output the detection signal.

7) Not only the morning glory 1, but also an automatic cleaning device for various sanitary appliances such as a washbasin. 8) A buzzer is provided instead of the LED 9, and the buzzer sounds to notify the electromagnetic on-off valve 4 of a failure. Also, LE
An LCD is provided in place of D9 to display a message notifying that the electromagnetic on-off valve 4 has failed.

The technical ideas other than the claims that can be understood from the above-described embodiments will be described below along with their effects. B) In the valve drive device according to claim 1, the operation detecting means 21 detects an inflection point at which the input drive voltage rises from a fall, and then electromagnetically opens and closes when an inflection point at which the drive voltage then rises and falls is detected. It is determined that the valve 4 has completed the opening / closing operation. With this configuration, it is possible to detect that the opening / closing operation of the electromagnetic opening / closing valve 4 is surely completed.

(B) In the valve drive device according to claim 2, when the operation detecting means 21 detects an inflection point at which the input drive current increases and decreases, and then detects an inflection point at which it decreases and then increases. First, it is determined that the electromagnetic opening / closing valve 4 has completed the opening / closing operation.

(C) In the valve drive device according to the third aspect, the level range detecting means 40, 41 have the drive voltage which changes according to the opening / closing operation of the electromagnetic opening / closing valve 4 and the preset reference voltages V1, V2. And are compared, and the level range is detected based on the comparison result. With this configuration, it is possible to easily detect a change in the drive voltage, and it is possible to detect that the opening / closing operation of the electromagnetic opening / closing valve 4 is surely completed.

In the present specification, the light emitting element is an element for projecting light having a preset wavelength and includes a semiconductor laser in addition to the light emitting diode. The wavelength of the projected light may be visible light or ultraviolet light as well as infrared light.

The light receiving element is an element that outputs a detection signal only when it receives light of the same wavelength as the projected light of the light emitting element, and includes a photodiode in addition to a phototransistor.

Any display means may be used as long as it informs the state (fault) of the electromagnetic on-off valve, and in addition to LEDs, it also includes display means using sound such as a buzzer and chime, and visual display means such as LCD. There is.

[0086]

As described in detail above, according to the present invention, it is possible to provide a valve drive device capable of detecting the operation state of the solenoid on-off valve and reducing the power consumption. . Further, it is possible to provide an automatic cleaning device for sanitary ware using such a valve drive device.

[Brief description of drawings]

FIG. 1 is an electric block circuit diagram of a first embodiment in which the present invention is embodied in an automatic washing device for a flush urinal for men.

FIG. 2 is a front view of the flush urinal for men according to the first embodiment.

FIG. 3 is a waveform diagram for explaining the operation of the first embodiment.

FIG. 4 is a waveform diagram for explaining the operation of the first embodiment.

FIG. 5 is a flowchart illustrating an opening operation of a pilot valve.

FIG. 6 is an electric block circuit diagram of the automatic washing device for a flush urinal for men according to the second embodiment.

FIG. 7 is a waveform diagram for explaining the operation of the second embodiment.

FIG. 8 is an electric block circuit diagram of an automatic washing device for a flush urinal for men according to a third embodiment.

FIG. 9 is a waveform diagram for explaining the operation of the third embodiment.

FIG. 10 is a partially cutaway side view showing an attached state of the flush urinal for men.

FIG. 11 is a front view of a conventional men's flush urinal.

FIG. 12 is an electric block circuit diagram of a conventional automatic washing device for a flush urinal for men.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Men's flush urinal as sanitary equipment, 4 ... Electromagnetic on-off valve, 6 ... User detection sensor as user detection means, 9
LED as display means 21, valve drive control means, voltage detection means, current detection means, level range detection means, operation detection means, user detection means, supply control means, microcomputer as judgment means, 22 ... Valve A valve drive circuit as drive control means, 23 ... A light emission drive circuit as user detection means, 26 ... A light receiving circuit as user detection means, 3
0, 31 ... Resistance as voltage detecting means, 32 ... Resistance as current detecting means, 40, 41 ... Comparator as level range detecting means, V1, V2 ... Reference voltage, O ... Valve open signal as opening / closing signal, C … A valve closing signal as an opening / closing signal.

Claims (5)

[Claims] 1. An electromagnetic on-off valve (4), a valve drive control means (21, 22) for opening and closing the electromagnetic on-off valve (4), and an opening-closing operation of the electromagnetic on-off valve (4). Completion of the opening / closing operation of the electromagnetic opening / closing valve (4) based on the voltage detecting means (30, 31, 21) for detecting the driving voltage and the driving voltage detected by the voltage detecting means (30, 31, 21). A valve drive device comprising a motion detecting means (21) for detecting. 2. An electromagnetic on-off valve (4), a valve drive control means (21, 22) for opening and closing the electromagnetic on-off valve (4), and an opening-closing operation of the electromagnetic on-off valve (4). Current detection means (32, 21) for detecting a drive current, and operation detection for detecting completion of opening / closing operation of the electromagnetic opening / closing valve (4) based on the drive current detected by the current detection means (32, 21). A valve drive comprising means (21). 3. An electromagnetic opening / closing valve (4), valve drive control means (21, 22) for opening / closing the electromagnetic opening / closing valve (4), and a change according to opening / closing operation of the electromagnetic opening / closing valve (4). Level range detecting means (4) for detecting the level range of the drive voltage
0, 41, 21) and the operation detecting means (21) for detecting the completion of the opening / closing operation of the electromagnetic opening / closing valve (4) based on the level range detected by the level range detecting means (40, 41, 21). And a valve drive device. 4. The valve drive device according to claim 1, wherein the electromagnetic opening / closing valve (4) is out of order when the electromagnetic opening / closing valve (4) does not complete the opening / closing operation. A valve drive device comprising: a judging means (21) for judging and a display means (9) for displaying a failure based on the judgment result of the judging means (21). 5. The valve drive device according to claim 4, a sanitary device (1), and user detection means (6, 21, 23, 26) for detecting the user of the sanitary device (1). Supply control means for controlling the valve drive device based on the detection result of the user detection means (6, 21, 23, 26) to supply the cleaning body to the sanitary ware (1) for a certain period of time. (21) An automatic cleaning device for sanitary ware comprising: