JP6120244B2 - Faucet device - Google Patents

Description

  The present invention relates to a faucet device that performs a cleaning operation by driving a latch-type electromagnetic valve.

  2. Description of the Related Art A faucet device that supplies cleaning water by opening and closing a solenoid valve by a user's operation in a wash basin or toilet has been known. It is also known to use hydroelectric power generation by the flow of discharged water as a drive power source for the electromagnetic valve. In general, since the amount of energy obtained by hydropower generation is small, a battery is provided for backup. Even when the battery is provided in this way, the battery capacity is limited, and therefore it is desirable that the solenoid valve of the faucet device operates with low power consumption.

  As a solenoid valve used for controlling water discharge, a latch-type solenoid valve that can maintain a water discharge state or a water stop state even when energization is stopped is suitable for reducing power consumption. A typical latching solenoid valve is composed of a latching solenoid having a plunger, a coil, and a permanent magnet, and a valve portion interlocking with the plunger. The plunger moves by energizing the coil and is held at the moved position by a permanent magnet. When the coil is energized in the reverse direction, the plunger moves away from the permanent magnet and is held at the moved position. Therefore, in the latch type solenoid valve, energization of the coil of the latching solenoid need only be performed when the solenoid valve is opened or closed, that is, only during the period required for the plunger movement, and the energization is stopped after the plunger movement is completed. By doing so, it can be operated with small electric power. In general, a latch solenoid valve used in a faucet device is designed so that the energization time is about several milliseconds. Further, the impedance of the electromagnetic valve is about several ohms to several tens of ohms. For example, when the operating voltage is 3 V, a power source capable of continuing a current of several hundred mA for several tens of ms is required for driving the electromagnetic valve. . A capacitor is often used as a means of storing this power. Further, when hydroelectric power generation is performed as described above, the capacitor is also suitable as a means for storing the generated energy.

By the way, the faucet device basically supplies the cleaning water by opening and closing the electromagnetic valve by the operation of the user. However, most of the day is a state in which there is no user, and during that period, the faucet device performs only a sensing operation for detecting the user's operation. As the sensing means, a switch, a sensor, and the like are conceivable, but the power that they constantly consume is much smaller than the power that is instantaneously consumed by energizing the solenoid valve described above.
When the power supply of the faucet device is designed with the ability to supply the minimum necessary power that allows the sensing operation that occupies most of the day to be stable, it does not have the large current capability that can instantaneously drive the solenoid valve. Become. Therefore, the power supply used for the faucet device requires a large current capacity required for driving the solenoid valve, and the power needs to be stored in a capacitor.

However, when the electric power for driving the solenoid valve is stored in the capacitor, there are the following problems. Immediately after the energization of the solenoid valve is finished, the voltage of the capacitor is reduced due to the discharge, so that it is necessary to charge the capacitor in preparation for energization of the next solenoid valve. The charging time of the capacitor depends on the power supply capacity, and the next energization cannot be executed until the charging is completed.
If this happens, there will be a time limit between the opening and closing operation of the solenoid valve and the opening and closing operation of the solenoid valve again. In devices, etc., a quick stop water operation could not be performed and the usability sometimes deteriorated.

As a solution to such a problem, it is conceivable to shorten the waiting time required for opening and closing the solenoid valve by shortening the charging time by rapidly charging the capacitor. In order to rapidly charge the capacitor, for example, the technique of Patent Document 1 can be applied.
Patent Document 1 discloses a circuit in which an auxiliary capacitor is provided in parallel with the drive capacitor and the drive capacitor is charged from the auxiliary capacitor after the solenoid valve is driven. In Patent Document 1, the purpose is that the booster circuit can efficiently perform the boosting operation. However, as an accompanying effect, the drive capacitor can be rapidly charged.
That is, the circuit configuration is such that the capacitor can be rapidly charged by charging using the electric power accumulated in the auxiliary capacitor, not the charge from the booster circuit.

JP2011-089551A

However, there are the following problems in rapidly charging with an auxiliary capacitor.
In the configuration of Patent Document 1, it is necessary to design the booster circuit charging capability and the auxiliary capacitor charging capability in a balanced manner. In particular, since the charging capacity of the auxiliary capacitor is determined by the capacitance and the internal resistance, it greatly depends on the characteristics of the auxiliary capacitor. In addition, since it is necessary to consider the aging of the capacitor, it has been difficult to construct a rapid charging system that is stable in the long term.
The present invention has been made to solve the above-mentioned problems. The problem of the present invention is that a water discharge operation can be performed in a short period of time by rapidly charging a capacitor for driving a solenoid valve. It is another object of the present invention to provide a faucet device that can operate stably over a long period of time.

In order to achieve the above object, according to the first aspect of the present invention, a latch-type electromagnetic valve for controlling water supply and water stop, power supply means, voltage conversion means for converting the voltage of the power supply means, a faucet apparatus and a solenoid valve driving means for controlling driving of the latching solenoid valve, power and one electric storage means to keep the power storage required for driving the latching solenoid valve, the voltage A first charging path for charging the power storage means via the conversion means, and a second charging path for charging the power storage means without going through the voltage conversion means, are provided.

  As a result, since the power storage means can be quickly charged through the second charging path, it is possible to perform the water discharge operation in a short period of time. Furthermore, since the output of the power supply means is connected to the power storage means by the shortest route, its charging capability can be stably operated over a long period.

According to a second aspect of the present invention, a second power storage means is provided in the middle of the second charging path.
Thereby, since the electric power output from the generator can be stored as the electric power for the next quick charge, it is possible to make a transition from immediately after the water stop operation to the start of the water discharge operation in a short time.

According to a third aspect of the present invention, there is provided a latch type electromagnetic valve that controls water supply and water stop, power supply means, voltage conversion means that converts the voltage of the power supply means, and the latch type electromagnetic valve. A water faucet device comprising: a solenoid valve driving means for controlling driving; a power storage means for storing electric power necessary for driving the latch type solenoid valve; and the power storage via the voltage conversion means A first charging path for charging the means, a second charging path for charging the power storage means without going through the voltage conversion means, and a switch means for cutting off the second charging path. Features.
As a result, the second charging path can be interrupted according to the state of the system, so that the stability of the entire system can be improved and the efficiency of the voltage conversion means can be improved.

According to a fourth aspect of the present invention, the power supply means includes a generator.
Thereby, even when a generator having a relatively low output is used, the opening and closing interval of the solenoid valve can be shortened by performing rapid charging via the second charging path.

According to a fifth aspect of the present invention, a battery is provided as the power supply means.
Thereby, even when a battery having a relatively low output is used, it is possible to shorten the opening / closing interval of the solenoid valve by performing rapid charging through the second charging path.

  According to the present invention, there is provided a water faucet device that can perform a spouting operation in a short period of time by rapidly charging a capacitor for driving a solenoid valve and can operate stably over a long period of time. be able to.

1 is a schematic view illustrating a water faucet device according to a first embodiment of the invention. It is a circuit diagram of the faucet device concerning a 1st embodiment. It is a circuit diagram of the faucet device concerning a 2nd embodiment. It is a circuit diagram of the water faucet device concerning a 3rd embodiment. It is a circuit diagram of the water faucet device concerning a 4th embodiment. It is a circuit diagram of the faucet device concerning a 5th embodiment. It is a circuit diagram of the faucet device concerning a 6th embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

(First embodiment)
First, a first embodiment of the present invention will be described.
FIG. 1 is a schematic view illustrating a water faucet device according to a first embodiment of the invention.
The faucet device according to the present embodiment includes a faucet body 1 fixed to a basin or the like, a light projecting element (not shown) and a light receiving element (not shown) provided in the faucet body 1. Latch type is provided in the water supply pipe 3 for supplying water (or hot water) to the faucet main body 1 and controlling the spout water from the faucet main body 1 by opening and closing the flow path of the water supply pipe 3. The electromagnetic valve 4 and the generator 5 provided on the downstream side of the latch type electromagnetic valve 4 for generating power by rotating the water wheel by the water flow, and the operation of the sensor 2 and the operation of the latch type electromagnetic valve 4 are controlled. It is comprised from the controller part 6 to which the electric power generated by the machine 5 is supplied. Note that a battery 7 as a backup power source is also connected to the controller unit 6. The generator 5 and the battery 7 serve as a power source for the entire faucet device as power supply means, and the latch type electromagnetic valve 4 is also operated by the power supplied from the generator 5 and the battery 7.

FIG. 2 is a circuit diagram of the faucet device according to the first embodiment.
The controller unit 6 includes all elements other than the sensor 2, the generator 5, the battery 7, and the latch electromagnetic valve 4 among the members and electronic components depicted in FIG. 2.
The sensor 2 is an active infrared sensor of a reflected light amount determination method, and the infrared signal projected from a light projecting element (not shown) is reflected by a user's hand that is put out to the water outlet of the faucet body 1. Then, the reflected infrared signal is received by a light receiving element (not shown). Then, the amount of light received by the light receiving element is compared with a preset threshold value to determine the presence or absence of the user, and the information is transmitted to the control unit 14.

The control unit 14 includes various functional units such as a CPU (Central Processing Unit), a memory, and an input / output interface, and these various functional units are connected to be communicable with each other via a data communication bus or the like.
The control unit 14 has at least an output interface for outputting an open signal to the electromagnetic valve driving means 17 and an output interface for outputting a close signal as input / output interfaces.

  The control unit 14 is a memory used as a work area when the CPU performs arithmetic processing, a non-volatile memory for storing various information, and a CPU executed to control the faucet device. A memory for storing a control program to be executed. These memories may be prepared separately or a single memory may be shared.

The sensor 2 and the controller unit 6 are connected by a predetermined connection cable. The predetermined connection cable includes a power line and a GND line for transmitting the power supplied from the controller unit 6 to the sensor 2, and a signal line for the sensor 2 to transmit sensing information to the controller unit 6. Yes.
Solenoid valve driving means 17 for controlling energization to the latch type solenoid valve 4 is connected to the control unit 14. The latch type electromagnetic valve 4 can be switched between an open state and a closed state by switching the direction in which the current flows. The latch solenoid valve 4 is configured to energize only when driven in the opening direction or the closing direction, and consumes less power.

The electric energy generated by the generator 5 is converted into direct current by the rectifying means 8 formed of a diode, restricted to be equal to or lower than a predetermined voltage by the voltage limiting means 9, and stored in the storage capacitor 11. The storage capacitor 11 is connected via the battery charging diode 10 so that the battery 7 can also store electricity. Hereinafter, in order to make the explanation easy to understand, in this embodiment, the control voltage value of the voltage limiting means 9 is 3V, and the initial voltage value of the battery 7 is also 3V.
The energy stored in the storage capacitor 11 is converted into a predetermined voltage by the voltage conversion means 12. In this embodiment, this voltage value is also 3V, and the operating voltage of the sensor 2, the control part 14, and the solenoid valve drive means 17 is also 3V.

Here, if the storage capacitor 11 is sufficiently charged at 3V, the voltage conversion means 12 is hardly required to operate, but if the charge amount of the storage capacitor 11 is not sufficient, for example, the charge voltage value is 2V. If there is, the voltage conversion means 12 operates to boost the 2V voltage to the 3V voltage. In the present embodiment, a booster circuit is illustrated as the voltage conversion unit 12. The step-up control IC 13 performs switching control of the current flowing through the step-up coil so that the output voltage becomes 3V.
Even when the charge amount of the storage capacitor 11 becomes insufficient due to a voltage drop due to the consumption of the battery 7 or a shortage of the power generation amount of the generator 5, the voltage conversion means 12 supplies a stable 3V voltage. Thus, the faucet device can operate stably as a whole.

  The energy required for driving the latching solenoid valve 4 is stored in the solenoid valve driving capacitor 16. When energizing the latch type electromagnetic valve 4, the control unit 14 drives the electromagnetic valve driving means 17. Specifically, an H-bridge FET constituting the electromagnetic valve driving means 17 is combined and turned on for a predetermined time. When energized in a certain direction for a predetermined time, the drive is opened, and when energized in the other direction for a predetermined time, the drive is closed. During the period when the latch type solenoid valve 4 is energized, the charge is discharged from the solenoid valve driving capacitor 16 and the charging voltage is lowered. For example, when the impedance of the latch type solenoid valve 4 is 5 ohms, the energization time is 20 ms, and the capacitor capacity is 10000 uF, the energization reduces the voltage from 3V to about 1.8V.

  At this time, if the voltage supplied to the sensor 2 or the control unit 14 is lowered, the sensor 2 or the control unit 14 may not operate correctly. In order to prevent this, a charging current limiting resistor 15 is inserted in the circuit. Ideally, the impedance of the charging current limiting resistor 15 should be sufficiently higher than the impedance of the latching solenoid valve 4. In this embodiment, about 10 to 100 ohms is appropriate. The charging current limiting resistor 15 not only prevents the supply voltage to the sensor 2 and the control unit 14 from being lowered, but also plays a role of suppressing the output current of the voltage conversion means 12. After the energization of the latch type solenoid valve 4, the voltage conversion means 12 starts a boosting operation in order to charge the discharged solenoid valve driving capacitor 16. At this time, since the charging current is charged via the charging current limiting resistor 15, the charging current is limited and no overcurrent flows. In the faucet device as in the present embodiment, only the operation of the sensor 2 and the control unit 14 is executed during the period when there is no user, so the power consumption is small, and this state occupies most of the day. Therefore, if the output current capability of the voltage conversion means 12 is small enough to cover the power consumption of the sensor 2 and the control unit 14, the electronic components can be downsized, the circuit can be simplified, Cost reduction can be realized.

  However, when the output current capability is designed in accordance with the power consumption of the sensor 2 and the control unit 14, it is clear that there is insufficient power to charge the solenoid valve driving capacitor 16, and if it is connected as it is, the voltage conversion means No. 12 becomes unstable due to power shortage. Therefore, in this embodiment, the charging current limiting resistor 15 is inserted in front of the solenoid valve driving capacitor 16 to prevent the operation of the voltage conversion means 12 from becoming unstable. Thus, the output of the generator 5 or the output of the battery 7 can be charged into the solenoid valve driving capacitor 16 via the storage capacitor 11, the voltage conversion means 12, and the charging current limiting resistor 15. The charging path is called a first charging path.

  The generator 5 is connected to the solenoid valve driving capacitor 16 via the rectifying means 8, the voltage limiting means 9, and the rapid charging diode 18. The output of the generator 5 can charge the solenoid valve driving capacitor 16 through this path, and this charging path is referred to as a second charging path. The second charging path can directly charge the solenoid valve driving capacitor 16 without going through the power storage capacitor 11, the voltage conversion means 12, and the charging current limiting resistor 15. Further, the second charging path is also connected to the battery 7 via the battery charging diode 10, and the solenoid valve driving capacitor 16 can be directly charged from the battery 7.

  The presence of the second charging path makes it possible to stop water in a short period of time, and the operation will be described. First, the solenoid valve driving capacitor 16 is fully charged to 3 V in a water stop state where there is no user. Here, when the sensor 2 senses a user, the control unit 14 opens the latch electromagnetic valve 4 to start water discharge. At this time, the voltage of the solenoid valve driving capacitor 16 decreases due to discharge. Since a water flow is generated at the same time, the generator 5 starts to generate electric power. Then, the generated electric power is charged into the solenoid valve driving capacitor 16 via the second charging path. If there is no second charging path, that is, if there is no rapid charging diode 18, the generated electric power passes through the first charging path, so that it takes time to charge the solenoid valve driving capacitor 16. . This is because the output of the voltage conversion means 12 is small as described above.

  On the other hand, since the second charging path can output without limitation of current, the solenoid valve driving capacitor 16 can be charged rapidly. When the sensor 2 no longer senses the user, the control unit 14 drives the latch electromagnetic valve 4 to close, and stops water discharge from the faucet device. At this time, the solenoid valve driving capacitor 16 is rapidly charged by the second charging path even in a short period of time where the user's usage time is less than 1 second, so that a quick water discharge operation is possible. It becomes. If there is no second charging path, the solenoid valve driving capacitor 16 is charged only through the first charging path, so that the charging speed is slow and the water stop must be suspended until 3V is reached. In addition, since the output of the generator 5 has stopped in the still water, the quick charge from the generator 5 cannot be performed during the period. However, in that case, since the battery 7 is connected to the second charging path, rapid charging from the battery 7 is possible. Thereby, the transition from immediately after the water stop operation to the start of the water discharge operation is also possible in a short time.

  As described above, since the solenoid valve driving capacitor 16 can be rapidly charged by the second charging path, the water discharge operation can be performed in a short period of time, and the usability is improved. Furthermore, since the output of the generator 5 or the battery 7 is connected to the electromagnetic valve driving capacitor 16 by the shortest route, its charging capability can be stably operated over a long period.

(Second Embodiment)
From here, the second embodiment will be described.
Since the basic configuration and control contents of the faucet device according to the second embodiment are the same as those described in the first embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted.
The difference from the first embodiment is the insertion position of the rapid charging diode.

  FIG. 3 is a circuit diagram of the faucet device according to the second embodiment. The anode side of the fast charging diode 19 is connected not to the generator 5 side but to the battery 7 side. The cathode side is connected to the solenoid valve driving capacitor 16 and does not change. That is, in the second embodiment, there is only one rapid charging diode 19 in the second charging path from the battery 7 to the solenoid valve driving capacitor 16. For this reason, the forward voltage drop due to the diode occurs only for one diode, and it becomes possible to more efficiently perform the quick charge from the battery 7 to the solenoid valve driving capacitor 16.

(Third embodiment)
From here, the third embodiment will be described.
Since the basic configuration and control contents of the faucet device according to the third embodiment are the same as those described in the first embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted. The difference from the first embodiment is that one quick charging diode 20 is added and a quick charging standby capacitor 21 is added.

  FIG. 4 is a circuit diagram of the faucet device according to the third embodiment. The quick charge standby capacitor 21 is disposed between the cathode of the quick charge diode 20 and the anode of the quick charge diode 18. As described above, since the output of the generator 5 can be obtained only during the water discharge, the generator 5 cannot be rapidly charged during the water stoppage. Therefore, the electric power generated at the time of water discharge is stored in the quick charge standby capacitor 21. Then, even in the water stop state, the rapid charging standby capacitor 21 can be rapidly charged to the solenoid valve driving capacitor 16. The rapid charging diode 20 is provided to prevent the charge accumulated in the rapid charging standby capacitor 21 from flowing into the storage capacitor 11. By doing so, the power output from the generator 5 can be stored as the power for the next quick charge, so that the transition from immediately after the water stop operation to the start of the water discharge operation can be performed in a short time.

(Fourth embodiment)
From here, the fourth embodiment will be described.
Since the basic configuration and control contents of the faucet device according to the fourth embodiment are the same as those described in the first embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted. The difference from the first embodiment is that a quick charge control switch 22 is added between the cathode of the quick charge diode 18 and the solenoid valve driving capacitor 16.

FIG. 5 is a circuit diagram of a water faucet device according to the fourth embodiment.
The quick charge control switch 22 can be turned on and off by the control unit 14, and the second quick charge path can be cut off.
This can cut off the second rapid charging path when rapid charging of the solenoid valve driving capacitor 16 is not necessary or when rapid charging is to be prohibited.
When quick charging is not necessary, for example, the output of the generator 5 may be small. When the output of the generator 5 does not rise to the set voltage (3V), rapid charging cannot be performed, so there is no need to connect the second charging path.

  For example, there is a demand for prohibiting rapid charging during initial operation. This is because when the battery 7 is first connected to operate the faucet device for the first time, if the second charging path is connected, an overcurrent flows from the battery 7 to the solenoid valve driving capacitor 16. This is because the battery 7 may be overstressed. Further, in some cases, since the entire faucet device is operated by the power source generated in the first charging path, the power source of the first charging path that is the power supply source of the sensor 2 and the control unit 14 is insufficient. As a result, the entire system may stop. When such a situation is a concern, all power can be input to the first charging path by blocking the second charging path.

  Further, by cutting off the second charging path, when the voltage of the storage capacitor 11 is lower than the voltage of the solenoid valve driving capacitor 16, the reverse current of the rapid charging diode 18 causes the solenoid valve driving capacitor 16 to It is also possible to prevent discharge. Since the solenoid valve driving capacitor 16 is also charged by the first charging path, the backflow of the current by the second charging path is eliminated by preventing the leakage current due to the rapid charging diode 18, and the conversion of the voltage converting means 12 is performed. Efficiency is improved.

(Fifth embodiment)
From here, the fifth embodiment will be described.
Since the basic configuration and control contents of the faucet device according to the fifth embodiment are the same as the contents described in the second embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted. The difference from the second embodiment is that a quick charge control switch 23 is added between the cathode of the quick charge diode 19 and the solenoid valve driving capacitor 16.

  FIG. 6 is a circuit diagram of a faucet device according to the fifth embodiment. The quick charge control switch 23 can be controlled to be turned on and off by the control unit 14, and the second quick charge path can be cut off. The reason and effect of adding the quick charge control switch 23 are the same as the contents described in the fourth embodiment, and only the battery 7 is the power source for the quick charge. For example, when the voltage of the battery 7 is low, quick charging is not necessary. In such a case, it is not necessary to connect the second charging path. Also, at the time of initial operation or the like, as described above, it is rather desirable to prohibit rapid charging. In this way, when it is desired to prohibit rapid charging, it is possible to prevent an overcurrent from flowing from the battery 7 by blocking the second charging path.

(Sixth embodiment)
From here, the sixth embodiment will be described. Since the basic configuration and control contents of the faucet device according to the sixth embodiment are the same as the contents described in the first embodiment, the same reference numerals are given to the same configurations and the description thereof is omitted. The difference from the first embodiment is that a quick charge control switch 24 is added between the anode of the quick charge diode 18 and the storage capacitor 11.

  FIG. 7 is a circuit diagram of a water faucet device according to the sixth embodiment. The quick charge control switch 24 can be controlled to be turned on and off by the control unit 14, and the second quick charge path can be cut off. The load impedance when viewed from the generator 5 is divided into a first charging path and a second charging path. By shutting off the first charging path by the quick charge control switch 24, it becomes possible to input all the electric power generated by the generator 5 into the second charging path, and charging the capacitor 16 for driving the electromagnetic valve. Time can be further shortened.

  The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the installation forms such as the shape, dimensions, material, and arrangement of each element included in the faucet device are not limited to those illustrated, and can be changed as appropriate. Specifically, human body detection by an infrared sensor is exemplified as a trigger for cleaning, but human body sensors such as light and μ wave, a switch operated by a user, and the like may be used.

  Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention. For example, the control may be a combination of the first embodiment and the second embodiment.

DESCRIPTION OF SYMBOLS 1 ... Faucet body 2 ... Sensor 3 ... Water supply pipe 4 ... Latch type solenoid valve 5 ... Generator (electric power supply means)
6 ... Controller 7 ... Battery (Power supply means)
8 ... Rectifying means 9 ... Voltage limiting means 10 ... Battery charging diode 11 ... Capacitor for storage 12 ... Voltage converting means 13 ... Boosting control IC
DESCRIPTION OF SYMBOLS 14 ... Control part 15 ... Charging current limiting resistor 16 ... Solenoid valve drive capacitor (electric storage means)
17 ... Solenoid valve driving means 18 ... Rapid charging diode 1
19 ... Rapid charging diode 2
20 ... Rapid charging diode 3
21 ... Capacitor for quick charge standby (second power storage means)
22 ... Quick charge control switch 1 (switch means)
23 ... Switch 2 for quick charge control (switch means)
24. Rapid charge control switch 3 (switch means)

Claims (5)

A latch-type solenoid valve for controlling water supply and water stoppage;
Power supply means;
Voltage conversion means for converting the voltage of the power supply means;
Solenoid valve drive means for controlling the drive of the latch type solenoid valve;
A faucet device comprising:
One power storage means for storing electric power necessary for driving the latch solenoid valve;
A first charging path for charging the power storage means via the voltage conversion means;
A second charging path for charging the power storage means without going through the voltage conversion means;
A faucet device comprising: A second power storage means is provided in the middle of the second charging path;
The faucet device according to claim 1. A latch-type solenoid valve for controlling water supply and water stoppage;
Power supply means;
Voltage conversion means for converting the voltage of the power supply means;
Solenoid valve drive means for controlling the drive of the latch type solenoid valve;
A faucet device comprising:
Power storage means for storing electric power necessary for driving the latch solenoid valve;
A first charging path for charging the power storage means via the voltage conversion means;
A second charging path for charging the power storage means without going through the voltage conversion means;
Switch means for blocking the second charging path is provided;
A faucet device characterized by that.   The faucet device according to any one of claims 1 to 3, further comprising a generator as the power supply means.   The water faucet device according to claim 1, further comprising a battery as the power supply unit.