JP2018162598A - Water discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water discharge device which can input a signal into a control unit from outside without enlarging a sensor unit and increasing the number of components.SOLUTION: A water discharge device comprises: a sensor unit performing detection of an object; and a controller unit provided separately from the sensor unit and opening and closing an electromagnetic valve according to detection results of the sensor unit. The sensor unit includes: a sensor detecting the object; and a control unit connected with the controller unit via a first signal line and a second signal line. The control unit includes: a normal operation mode performing detection operation of the object; and a low electric power consumption mode with lower electric power consumption than that of the normal operation mode. The controller unit includes a pulse generation unit which is connected to either the first signal line or the second signal line and which inputs a pulse signal for returning the control unit from the low electric power consumption mode to the normal operation mode into either the first signal line or the second signal line.SELECTED DRAWING: Figure 2

Description

  Aspects of the present invention generally relate to a water discharge device.

  There is a water discharger that automatically controls water discharge by detecting an object such as a user's hand with a sensor and driving an electromagnetic valve. Such a water discharge device is applied to, for example, a faucet device, a urinal, or a urinal.

  In a water discharge device, a sensor unit that detects an object and a controller unit that performs opening / closing drive of an electromagnetic valve and the like are separately arranged (see, for example, Patent Document 1). The sensor unit includes a sensor and a control unit that transmits a signal corresponding to the detection result of the sensor to the controller unit. The controller unit opens and closes the electromagnetic valve according to a signal from the control unit.

  For example, the controller unit is disposed in a storage space below the washstand. On the other hand, a sensor part is arrange | positioned in the vicinity of the water outlet which discharges water. Thereby, while being able to suppress the enlargement of the water discharge part which has a water discharge port, the influence of the disturbance noise in a sensor part is suppressed, and the detection accuracy of a target object is improved while suppressing sensor output and realizing low power consumption. be able to.

  In such a water discharge device, in order to further reduce power consumption, it has been proposed to periodically set a control unit provided in the sensor unit to a low power consumption mode such as a sleep mode. In order to reduce power consumption as much as possible, it is necessary to stop internal clock oscillation in the control unit. However, if the clock oscillation is stopped, it is necessary to input a signal from the outside to the control unit when the control unit is returned from the low power consumption mode to the normal operation mode.

  For example, if a circuit for inputting a signal from the outside is provided in the sensor unit, the sensor unit is increased in size. That is, the size of the water discharge part is increased. On the other hand, when a circuit for inputting a signal from the outside to the control unit is provided on the controller unit side, the number of wires connecting the sensor unit and the controller unit increases, resulting in an increase in the number of parts. I will. For example, the manufacturing cost of the water discharging device is increased.

  For this reason, in the water discharge device, even when the sensor unit and the controller unit are separated and the control unit provided in the sensor unit is periodically set in the low power consumption mode, the sensor unit is increased in size and the number of parts. It is desired that a signal can be input from the outside to the control unit without causing an increase in

JP 2013-189790 A

  The present invention has been made on the basis of recognition of such a problem. In the case where the sensor unit and the controller unit are separately arranged, and the control unit provided in the sensor unit is periodically set to a low power consumption mode. Another object of the present invention is to provide a water discharger that can input a signal from the outside to the control unit without increasing the size of the sensor unit or increasing the number of parts.

  A first invention includes a water discharge section having a water discharge port for discharging water, a water supply path for guiding water from a water supply source to the water discharge port, a self-holding solenoid valve for opening and closing the water supply path, and detection of an object Each of a sensor unit that performs the operation, a controller unit that is provided separately from the sensor unit, and that opens and closes the electromagnetic valve according to a detection result of the sensor unit, and the electromagnetic valve, the sensor unit, and the controller unit A power supply unit that supplies power to the sensor unit, wherein the sensor unit is connected to the sensor unit through the first signal line and the second signal line, and the detection result of the sensor. On the basis of this, an open command signal for commanding execution of an opening drive for opening the solenoid valve is input from the first signal line to the controller unit, and a closing drive signal for closing the solenoid valve is provided. Direct execution A control unit that inputs a closing command signal from the second signal line to the controller unit, and the control unit consumes more than the normal operation mode and the normal operation mode for detecting the object. A low power consumption mode in which power is reduced, and after performing the detection operation in the normal operation mode, the mode is shifted to the low power consumption mode, and the low power consumption is determined in response to an external signal input. The controller unit is connected to one of the first signal line and the second signal line to return the control unit from the low power consumption mode to the normal operation mode. The water discharge device is characterized in that it has a pulse generator for inputting the pulse signal to the one of the first signal line and the second signal line.

  According to this water discharging apparatus, the controller unit is connected to one of the first signal line and the second signal line, and the pulse signal for returning the control unit from the low power consumption mode to the normal operation mode is transmitted to the first signal line. And a pulse generator for inputting to one of the second signal lines. Thus, it is not necessary to provide a dedicated signal line while providing the pulse generating unit in the controller unit. Therefore, even when the sensor unit and the controller unit are arranged separately and the control unit provided in the sensor unit is periodically set to the low power consumption mode, the sensor unit is enlarged and the number of parts is increased. There is provided a water discharging device capable of inputting a signal from the outside to the control unit.

  A second invention is the water discharge device according to the first invention, wherein the pulse generating unit is connected to the first signal line.

  According to this water spouting device, by connecting the pulse generating unit to the first signal line for inputting the open command signal, it is possible to suppress the influence on the closing drive and to further improve the reliability of the water spouting device. .

  According to a third invention, in the first or second invention, the pulse generation unit includes a voltage detection unit that detects a voltage of the power supply unit, and when the voltage detection unit detects a predetermined voltage, When the first signal line is in the predetermined state with the first signal line in a predetermined state and the control unit is discharging water from the water discharge unit, the controller unit starts from the second signal line. The water discharge device is characterized by instructing the execution of the closing drive.

  According to this water discharge device, water can be safely stopped, and the reliability of the water discharge device can be further improved.

  According to a fourth invention, in any one of the first to third inventions, the power supply unit includes a booster circuit that boosts an input voltage to a predetermined output voltage, and the pulse generator includes the booster circuit. It is a water discharging apparatus characterized by controlling driving.

  According to this water discharge device, the booster circuit can be driven only when necessary, and the power consumption can be further suppressed.

  According to the aspect of the present invention, even when the sensor unit and the controller unit are arranged separately and the control unit provided in the sensor unit is periodically set to the low power consumption mode, the sensor unit can be increased in size and components. There is provided a water discharger capable of inputting a signal from the outside to the control unit without increasing the number of points.

It is explanatory drawing showing the faucet device concerning a 1st embodiment. It is a block diagram showing the faucet device concerning a 1st embodiment. It is a circuit diagram showing the faucet device concerning a 1st embodiment. It is a flowchart showing an example of operation | movement of the faucet apparatus which concerns on 1st Embodiment. It is a timing chart showing an example of operation of the faucet device concerning a 1st embodiment. It is a timing chart showing an example of operation of the faucet device concerning a 1st embodiment. It is a timing chart showing an example of operation of the faucet device concerning a 1st embodiment. It is a circuit diagram showing the modification of the faucet device concerning a 1st embodiment. It is a circuit diagram showing the modification of the faucet device concerning a 1st embodiment. It is a timing chart showing the modification of operation | movement of the faucet apparatus which concerns on 1st Embodiment. It is a circuit diagram showing the modification of the faucet device concerning a 1st embodiment. It is a flowchart showing the modification of operation | movement of the faucet apparatus which concerns on 1st Embodiment. It is a timing chart showing the modification of operation | movement of the faucet apparatus which concerns on 1st Embodiment. It is a timing chart showing the modification of operation | movement of the faucet apparatus which concerns on 1st Embodiment. It is a circuit diagram showing the modification of the faucet device concerning a 1st embodiment. It is a circuit diagram showing the modification of the faucet device concerning a 1st embodiment. It is a circuit diagram showing the modification of the faucet device concerning a 1st embodiment. It is a circuit diagram showing the modification of the faucet device concerning a 1st embodiment. It is a perspective view showing the toilet apparatus concerning 2nd Embodiment. It is explanatory drawing showing the toilet apparatus concerning 3rd Embodiment.

Hereinafter, embodiments will be described 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)
Drawing 1 is an explanatory view showing the faucet device concerning a 1st embodiment.
As shown in FIG. 1, the faucet device 10 (water discharge device) detects a target object (human body, object, etc.) and performs automatic water discharge, and a basin 11 provided in a wash basin. Water is discharged against the water.

  The basin 11 is provided on the upper surface of the basin counter 12. A water faucet 13 (a water discharge portion) constituting a spout for discharging water to the bowl surface 11 a of the basin 11 is provided on the wash counter 12. The faucet 13 has a water discharge port 13 a for discharging water, and is provided so that water discharged from the water discharge port 13 a is discharged into the bowl surface 11 a of the basin 11.

  The water discharged from the water spout 13 a by the faucet 13 is supplied by the water supply channel 14. The water supply channel 14 guides water supplied from a water supply source such as a water pipe to the water discharge port 13a. A drainage channel 15 is connected to the basin 11. The drainage channel 15 discharges the water discharged from the water outlet 13a into the bowl surface 11a of the basin 11.

  The faucet device 10 includes an electromagnetic valve 16, a sensor unit 18, a controller unit 20, and a power generation unit 22. The sensor unit 18 is separated from the controller unit 20. The sensor part 18 is accommodated in the faucet 13, for example. The solenoid valve 16 and the controller unit 20 are accommodated, for example, below the washstand. The solenoid valve 16 and the controller unit 20 are accommodated in, for example, a cabinet (not shown) provided below the wash counter 12.

  The sensor unit 18 and the controller unit 20 are connected by a connection cable 17. For example, the controller unit 20 supplies a power supply voltage to the sensor unit 18 via the connection cable 17 and controls the sensor unit 18 via the connection cable 17.

  The electromagnetic valve 16 is provided in the water supply channel 14 and opens and closes the water supply channel 14. When the electromagnetic valve 16 is opened, the water supplied from the water supply passage 14 is discharged from the water outlet 13a. When the electromagnetic valve 16 is closed, the water supplied from the water supply passage 14 is not discharged from the water outlet 13a. It becomes a water state.

  The electromagnetic valve 16 is connected to the controller unit 20, and the controller unit 20 drives the electromagnetic valve 16 to control the opening / closing operation. The electromagnetic valve 16 is electrically controlled in accordance with a control signal from the controller unit 20 to open and close the water supply channel 14. Thus, the electromagnetic valve 16 functions as a water supply valve that opens and closes the water supply path 14 of water discharged from the water outlet 13a.

  The solenoid valve 16 is a self-holding solenoid valve (latched solenoid valve) called a so-called latching solenoid valve, and operates from a closed state to an open state (opening operation) by energizing the solenoid coil in one direction. After that, even if the energization to the solenoid coil is interrupted, the open state is maintained, the energization in the other direction to the solenoid coil operates from the open state to the closed state (closing operation), and then the energization to the solenoid coil is interrupted Even if it is closed.

  The sensor unit 18 detects an object (such as a hand) that approaches the spout 13a. The water discharge destination of the water discharge port 13 a becomes a detection region of the sensor unit 18. The sensor unit 18 detects the position, movement, and the like of the object by transmitting an optical signal and receiving a reflected signal reflected from the object such as a human body that has received the transmitted optical signal.

  The sensor unit 18 is, for example, an optical sensor using an infrared light signal. The optical signal transmitted from the sensor unit 18 may be, for example, visible light. In the following description, the optical signal is described as infrared light. The “infrared light” is light having a wavelength of 0.7 μm or more and 1000 μm or less, for example. For example, an ultrasonic sensor or a microwave sensor may be used as the sensor unit 18.

  The sensor unit 18 is provided inside the faucet 13 near the water outlet 13a, and is arranged to transmit an optical signal toward the user side (left side in FIG. 1) of the washstand. Thereby, the sensor part 18 makes it possible to detect that a human body has approached the spout 13a, that a hand has been pushed out from the human body approaching the spout 13a toward the spout 13a, and the like.

  The sensor unit 18 inputs a detection signal representing the detection result of the object to the controller unit 20 via the connection cable 17. The controller unit 20 detects the presence or absence of an object based on the detection signal input from the sensor unit 18. For example, the controller unit 20 detects the position and movement of the object based on the detection signal. And the controller part 20 controls the opening / closing operation | movement of the solenoid valve 16 based on this detection result. The controller unit 20 outputs a control signal to the sensor unit 18 to control the sensing operation of the sensor unit 18.

  The power generation unit 22 is provided, for example, on the water supply path 14 between the faucet 13 and the electromagnetic valve 16, and generates power using the flow of water flowing through the water supply path 14 when the electromagnetic valve 16 is opened. I do. The power generation unit 22 supplies the generated power to the controller unit 20. The power generation unit 22 is provided as necessary and can be omitted.

  As described above, the faucet device 10 of this embodiment includes the electromagnetic valve 16, the sensor unit 18, the controller unit 20, and the power generation unit 22, and the controller unit 20 based on the detection signal of the sensor unit 18. As a result of the control, the opening / closing operation of the electromagnetic valve 16 is controlled. Thereby, the water discharge according to the detection result (movement of the user of a washstand, etc.) of the target object which approaches the water discharge opening 13a is performed. The controller unit 20 performs water discharge according to the detection of the object, and stops water discharge according to the non-detection of the object. That is, in the water faucet device 10, water is automatically discharged while the user puts out a hand or the like near the water outlet 13a.

  The sensor unit 18 is not always operating, and the controller unit 20 controls the sensor unit 18 so that it operates at a timing that requires sensing. Thereby, the power consumption of the sensor part 18 can be reduced. For example, the controller unit 20 reduces the frequency of the sensing operation of the sensor unit 18 to such an extent that the user does not feel inconvenient. Thereby, the power consumption of the faucet device 10 as a whole can be reduced.

FIG. 2 is a block diagram illustrating the faucet device according to the first embodiment.
FIG. 3 is a circuit diagram showing the water faucet device according to the first embodiment.
As shown in FIGS. 2 and 3, the sensor unit 18 includes a sensor 30 and a control unit 32. The controller unit 20 includes a drive control unit 40, a valve drive circuit 42, a pulse generation unit 44, and a power supply unit 46 that constitute a drive unit.

  The sensor 30 includes a light projecting element that projects infrared light, a light receiving element that receives infrared light, and an object detection processing unit. The object detection processing unit controls the light projection and light reception timing of the light projecting element and the light receiving element, and performs object detection based on the optical signal received by the light receiving element. The object detection processing unit outputs a detection signal to the control unit 32 when the object is detected.

  The control unit 32 includes various functional parts such as a CPU (Central Processing Unit), a memory, and an input / output interface, and these various functional parts are connected to each other via a data communication bus or the like.

  The control unit 32 has at least an input / output interface for inputting / outputting the open command signal S1 to / from the drive control unit 40 and an input / output interface for inputting / outputting the close command signal S2 as input / output interfaces.

  The control unit 32 includes at least a memory used as a work area when the CPU performs arithmetic processing, a non-volatile memory for storing various information, and a CPU for controlling the faucet device 10. And 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 unit 18 and the controller unit 20 are connected by a connection cable 17. The connection cable 17 transmits a power supply line L5 and a GND line L6 for transmitting power supplied from the controller unit 20 to the sensor unit 18, and an open command signal S1 output from the sensor unit 18 to the controller unit 20. The first signal line L1 and the second signal line L2 for transmitting the closing command signal S2 are configured by a total of four wires.

  The open command signal S1 output from the control unit 32 is input to the drive control unit 40 via the first signal line L1, and the close command signal S2 output from the control unit 32 is driven and controlled via the second signal line L2. Input to the unit 40.

  The opening command signal S1 is a signal for instructing the drive control unit 40 to execute opening driving for opening the solenoid valve 16, and the closing command signal S2 is for closing the solenoid valve 16. This is a signal for instructing the drive control unit 40 to execute a closed drive for valve operation.

  The drive control unit 40 is connected to the valve drive circuit 42 through the third signal line L3 and the fourth signal line L4. The third signal line L3 is a signal line that transmits the open drive signal S3 between the drive control unit 40 and the valve drive circuit 42, and the fourth signal line L4 is between the drive control unit 40 and the valve drive circuit 42. It is a signal line for transmitting the closed drive signal S4 between them.

  The open drive signal S3 is a signal for instructing the valve drive circuit 42 to execute a valve opening operation for opening the solenoid valve 16, and the close drive signal S4 is a signal for opening the solenoid valve 16. This is a signal for instructing the valve drive circuit 42 to perform a valve closing operation for closing the valve.

  Hereinafter, the output states of these signals S1 to S4 will be described using the word active / inactive. The active open command signal S1 means a signal for commanding the drive control unit 40 to open the electromagnetic valve 16, and the inactive open command signal S1 is a signal for the solenoid valve 16 to the drive control unit 40. This means a signal that does not command open driving. The active close command signal S2 means a signal for instructing the drive controller 40 to close the electromagnetic valve 16, and the inactive close command signal S2 is an electromagnetic signal for the drive controller 40. It means a signal that does not command the closing drive of the valve 16.

  The active open drive signal S3 means a drive signal for instructing a drive for opening the electromagnetic valve 16, and the inactive open drive signal S3 is a drive for not instructing a drive for opening the electromagnetic valve 16. Means signal. The active closing drive signal S4 means a driving signal for instructing driving for closing the electromagnetic valve 16, and the inactive closing driving signal S4 is a driving for not instructing driving for closing the electromagnetic valve 16. Means signal.

  The drive control unit 40 includes an open drive control circuit 40 a that controls the open drive of the valve drive circuit 42, and a closed drive control circuit 40 b that controls the close drive of the valve drive circuit 42. The open drive control circuit 40a performs an open drive control that generates an open drive signal S3 based on the open command signal S1 input from the control unit 32 and outputs the generated signal to the valve drive circuit 42. The closed drive control circuit 40b performs closed drive control that generates a closed drive signal S4 based on the close command signal S2 input from the control unit 32 and outputs it to the valve drive circuit 42.

  For example, when the open command signal S1 is an active low logic signal and the open drive signal S3 is an active high logic signal, the open drive control circuit 40a generates and outputs a signal obtained by inverting the logic of the open command signal S1. The circuit can be configured. FIG. 3 illustrates, as an example of such a circuit, a transistor circuit that generates and outputs a signal whose logic is inverted.

  In the example shown in FIG. 3, since the valve drive circuit 42 is an H-type bridge circuit, the open drive control circuit 40a drives the N-type FET and the P-type FET to open the solenoid coil of the solenoid valve 16. A current flows in the direction. For this reason, the open drive signal S3 is applied as it is to the gate of the N-type FET, but a voltage obtained by logically inverting the logic of the open drive signal S3 by an inverting circuit is applied to the gate of the P-type FET. It is designed to be applied.

  For example, when the close command signal S2 is an active low logic signal and the close drive signal S4 is an active high logic signal, the close drive control circuit 40b generates and outputs a signal obtained by inverting the logic of the close command signal S2. The circuit can be configured. FIG. 3 illustrates, as an example of such a circuit, a transistor circuit that generates and outputs a signal whose logic is inverted.

  In the example shown in FIG. 3, since the valve drive circuit 42 is an H-type bridge circuit, the closing drive control circuit 40b closes the solenoid coil of the solenoid valve 16 by driving an N-type FET and a P-type FET. A current flows in the direction. For this reason, the closed drive signal S4 is applied as it is to the gate of the N-type FET, but a voltage obtained by logically inverting the logic of the closed drive signal S4 by an inverting circuit is applied to the gate of the P-type FET. It is designed to be applied.

  The logical relationship between the open command signal S1 and the open drive signal S3 and the logical relationship between the close command signal S2 and the close drive signal S4 described here are examples, and can be variously changed without departing from the scope of the present invention. Needless to say.

  When the opening drive signal S3 is input via the third signal line L3, the valve drive circuit 42 performs the opening drive for opening the electromagnetic valve 16, and the closing drive signal S4 is transmitted via the fourth signal line L4. When input, a closing drive for closing the solenoid valve 16 is performed. As a result, the valve drive circuit 42 may change the open / close state of the electromagnetic valve 16 to a state corresponding to the opening / closing drive of the drive control unit 40, and thus to a state corresponding to the opening / closing command of the control unit 32. I can do it.

  In FIG. 3, the valve drive circuit 42 is configured to drive the solenoid coil of the solenoid valve 16 as a load by an H-type bridge circuit using four transistors (field effect transistors in the figure). In the H-type bridge circuit, a diode is arranged in parallel with each transistor as a countermeasure against the back electromotive force of the solenoid coil that is an inductive load.

  The valve drive circuit 42 causes a current in one direction (open direction) to flow through the solenoid coil of the latching solenoid of the electromagnetic valve 16 in response to the open drive signal S3 input from the drive control unit 40, and the close input input from the drive control unit 40. A current in the other direction (closed direction) is caused to flow through the solenoid coil of the latching solenoid of the solenoid valve 16 by the drive signal S4. Thereby, the solenoid valve 16 opens / closes according to the direction of the current flowing through the solenoid coil, and opens and closes the water supply path 14.

  The open drive control circuit 40a includes, for example, a PNP transistor Tr1. The base of the transistor Tr1 is connected to the first signal line L1. The collector of the transistor Tr1 is connected to the third signal line L3.

  The closed drive control circuit 40b includes, for example, a PNP transistor Tr2. The base of the transistor Tr2 is connected to the second signal line L2. The collector of the transistor Tr2 is connected to the fourth signal line L4.

  The valve drive circuit 42 includes, for example, inverting circuits 42a and 42b and a bridge circuit 42c. The inverting circuit 42a includes, for example, an NPN transistor Tr3. The inverting circuit 42b includes, for example, an NPN transistor Tr4. The bridge circuit 42c includes, for example, P-type FETs 42c1 and 42c2 and N-type FETs 42c3 and 42c4.

  The base of the transistor Tr3 is connected to the third signal line L3. The collector of the transistor Tr3 is connected to the gate of the FET 42c1. The base of the transistor Tr4 is connected to the fourth signal line L4. The collector of the transistor Tr4 is connected to the gate of the FET 42c2. The gate of the FET 42c3 is connected to the third signal line L3. The gate of the FET 42c4 is connected to the fourth signal line L4.

  When the first signal line L1 is set to a low level, the transistor Tr1 is turned on. When the transistor Tr1 is turned on, the third signal line L3 is set to a high level, and the transistor Tr3 is turned on. When the transistor Tr3 is turned on, the gate of the FET 42c1 becomes a low level, and the FET 42c1 is turned on. Further, since the third signal line L3 is set to the high level, the FET 42c3 is also turned on. Thereby, an electric current flows in the direction shown by the arrow A with respect to the electromagnetic valve 16, and the electromagnetic valve 16 will be in an open state.

  When the second signal line L2 is set to a low level, the transistor Tr2 is turned on. When the transistor Tr2 is turned on, the fourth signal line L4 is set to a high level, and the transistor Tr4 is turned on. When the transistor Tr4 is turned on, the gate of the FET 42c2 becomes low level, and the FET 42c2 is turned on. Further, since the fourth signal line L4 is set to the high level, the FET 42c4 is also turned on. Thereby, as shown by the arrow B with respect to the electromagnetic valve 16, a current flows in the direction opposite to that during open driving, and the electromagnetic valve 16 is closed.

  The control unit 32 sets both the first signal line L1 and the second signal line L2 to a high level in a standby state where no object is sensed. Thereby, for example, the closed state of the electromagnetic valve 16 is maintained. When the control unit 32 detects the detection of the object based on the detection result of the sensor 30, the control unit 32 temporarily sets the first signal line L1 to the low level. As a result, the electromagnetic valve 16 is opened, and water is discharged from the faucet 13. And the control part 32 will make the 2nd signal line L2 temporarily low level, if the non-detection of a target object is detected based on the detection result of the sensor 30. FIG. As a result, the electromagnetic valve 16 is closed and the discharge of water from the faucet 13 is stopped.

  In addition, the control unit 32 includes a normal operation mode in which the object detection operation is performed as described above, and a low power consumption mode in which the power consumption is lower than that in the normal operation mode without performing the object detection operation. Have. The low power consumption mode is, for example, a state where at least part of the internal clock oscillation is stopped. The low power consumption mode is, for example, a sleep mode. For this reason, the control unit 32 does not return from the low power consumption mode to the normal operation mode unless an external signal is input. The low power consumption mode may be any operation state in which the power consumption is lower than that in the normal operation mode and does not return unless there is an external signal input.

  The control unit 32 has an input terminal 32a. The control unit 32 returns from the low power consumption mode to the normal operation mode in response to an external signal input to the input terminal 32a. For example, the control unit 32 generates an external interrupt in response to a predetermined signal input to the input terminal 32a, and returns from the low power consumption mode to the normal operation mode. The input terminal 32a is connected to the first signal line L1.

  After performing the operation in the normal operation mode, the control unit 32 shifts to the low power consumption mode. Then, for example, in the low power consumption mode, the control unit 32 returns from the low power consumption mode to the normal operation mode in response to the switching of the first signal line L1 from the high level to the low level.

  More specifically, the control unit 32 determines whether or not the object is sensed based on the detection result of the sensor 30 in the normal operation mode. When the control unit 32 determines the sensing of the object in the water stop state in which water is not discharged from the faucet 13, the control unit 32 activates the open command signal S1 of the first signal line L1 and opens the electromagnetic valve 16. Then, the opening command signal S1 of the first signal line L1 is returned to inactive, and the normal operation mode is shifted to the low power consumption mode.

  When the controller 32 determines that the object is not sensed in the water discharge state in which water is being discharged from the faucet 13, the controller 32 activates the close command signal S2 of the second signal line L2 and closes the solenoid valve 16. Then, the close command signal S2 of the second signal line L2 is returned to inactive, and the normal operation mode is shifted to the low power consumption mode.

  When determining that the object is not sensed in the water stop state, the control unit 32 shifts from the normal operation mode to the low power consumption mode while maintaining the closed state of the electromagnetic valve 16.

  When determining that the object is detected in the water discharge state, the control unit 32 shifts from the normal operation mode to the low power consumption mode while maintaining the open state of the electromagnetic valve 16.

  Then, when the open command signal S1 of the first signal line L1 becomes active in the low power consumption mode, the control unit 32 shifts from the low power consumption mode to the normal operation mode and executes any one of the above operations. .

  The pulse generator 44 is connected to the first signal line L1. The pulse generation unit 44 generates a pulse signal that temporarily activates the open command signal S1 of the first signal line L1 at a predetermined cycle longer than the longest operation time of the normal operation mode of the control unit 32. To enter. The time for which the pulse generation unit 44 activates the opening command signal S1 is necessary for the control unit 32 to shift from the low power consumption mode to the normal operation mode, and the control unit 32 controls the opening command signal S1. It is time that does not interfere. For example, the pulse generation unit 44 may perform an open command while determining whether the object is detected or not based on the detection result of the sensor 30 after the control unit 32 shifts from the low power consumption mode to the normal operation mode. Return signal S1 from active to inactive.

  Accordingly, the control unit 32 performs the operation in the normal operation mode and shifts to the low power consumption mode, and then returns from the low power consumption mode to the normal operation mode in response to the input of the pulse signal of the pulse generation unit 44. Therefore, the control unit 32 periodically repeats the normal operation mode and the low power consumption mode according to the period of the pulse signal of the pulse generation unit 44. Accordingly, it is possible to control to automatically discharge water from the faucet 13 in response to sensing of the object and to automatically stop ejection of water from the faucet 13 in response to non-sensing of the object.

  In this example, the pulse generator 44 is connected to the base of the transistor Tr1. In this case, when the open command signal S1 is activated, the open drive signal S3 is also activated. Therefore, in this example, the pulse generator 44 is also connected to the third signal line L3. The pulse generator 44 deactivates the open drive signal S3 at the timing when the open command signal S1 is activated. Thereby, it is possible to prevent water from being discharged from the faucet 13 at the timing when the pulse generation unit 44 activates the opening command signal S1. The configuration of the pulse generator 44 is not limited to the above, and any configuration that can periodically activate the open command signal S1 and deactivate the open drive signal S3 at the timing when the open command signal S1 is activated. It's okay.

  The power supply unit 46 is connected to the power generation unit 22 and the battery 24. The power supply unit 46 converts DC power supplied from the power generation unit 22 and the battery 24 into DC power having a predetermined voltage value, and supplies the DC power to each part of the electromagnetic valve 16, the sensor unit 18, the controller unit 20, and the like. The battery 24 is detachably attached to a holder or the like (not shown). The battery 24 is detachably connected to the power supply unit 46. When the voltage of the battery 24 decreases, the battery 24 is replaced.

  The power supply unit 46 includes, for example, a storage capacitor 50, a booster circuit 52, a limiting resistor 54, a driving capacitor 56, and a charging voltage limiting unit 58.

  The storage capacitor 50 stores the DC power supplied from the power generation unit 22 and the battery 24. The charging voltage limiting unit 58 detects the voltage of the storage capacitor 50, and stops the supply of DC power from the power generation unit 22 to the storage capacitor 50 when the voltage of the storage capacitor 50 is equal to or higher than a predetermined value. The overcharge of the capacitor 50 is suppressed.

  The booster circuit 52 converts the DC power stored in the storage capacitor 50 into DC power having a predetermined voltage value. The booster circuit 52 converts, for example, DC power having a first voltage value stored in the storage capacitor 50 into DC power having a second voltage value higher than the first voltage value. In other words, the booster circuit 52 boosts the voltage value of the DC power stored in the storage capacitor 50. Thus, the booster circuit 52 boosts the input voltage to a predetermined output voltage.

  The booster circuit 52 includes a boost controller 52a. The step-up control unit 52a includes, for example, a switching element, and controls the conversion of DC power by the step-up circuit 52 by switching the switching element on and off. For example, the boost control unit 52a controls on / off of the switching element so that the voltage value of the converted DC power is substantially constant.

  The booster circuit 52 supplies the converted DC power to each unit of the sensor unit 18 and the controller unit 20. Each unit of the sensor unit 18 and the controller unit 20 operates in response to power supply from the booster circuit 52. The booster circuit 52 charges the drive capacitor 56 with the converted DC power.

  The limiting resistor 54 limits the current and voltage of DC power supplied from the booster circuit 52 to the driving capacitor 56. The drive capacitor 56 supplies current to the solenoid coil of the solenoid valve 16. In other words, the drive capacitor 56 is a capacitor for driving the solenoid coil of the solenoid valve 16. A relatively large current flows through the solenoid coil of the solenoid valve 16. The drive capacitor 56 stores electric power to be supplied to the solenoid coil of the solenoid valve 16 so that the load is instantaneously increased when the solenoid coil of the solenoid valve 16 is operated, and the sensor unit 18, the controller unit 20, and the booster circuit. It is possible to prevent the operation of 52 and the like from becoming unstable.

FIG. 4 is a flowchart showing an example of the operation of the faucet device according to the first embodiment.
5 to 7 are timing charts showing an example of the operation of the faucet device according to the first embodiment.
As shown in FIGS. 4 to 7, when the control unit 32 of the sensor unit 18 starts operation with connection of the battery 24 to the power supply unit 46, first, the control unit 32 activates the close command signal S <b> 2. Then, the water stop control is started (step S01 in FIG. 4). When the close command signal S2 is activated, the close drive signal S4 becomes active, a current flows through the solenoid valve of the solenoid valve 16, and the solenoid valve 16 is closed.

  After performing the water stop control, the control unit 32 deactivates the opening command signal S1 and the closing command signal S2 (step S02 in FIG. 4, timing T01 in FIG. 5). Thereby, the closed state of the solenoid valve 16 is maintained. That is, the state where water is not discharged from the faucet 13 is maintained. Thereafter, the control unit 32 shifts to the low power consumption mode (step S03 in FIG. 4).

  When the battery 24 is connected to the power supply unit 46 and power is supplied from the power supply unit 46 to the pulse generation unit 44, the pulse generation unit 44 is activated. When activated in response to the supply of power, the pulse generator 44 starts generating a pulse signal and inputs the generated pulse signal to the first signal line L1.

  The control unit 32 maintains the low power consumption mode until the opening command signal S1 of the first signal line L1 is activated by the pulse signal from the pulse generation unit 44 (step S04 in FIG. 4). Then, the control unit 32 shifts from the low power consumption mode to the normal operation mode in response to the activation of the open command signal S1 of the first signal line L1 by the pulse signal from the pulse generation unit 44 (FIG. 4 step S05, timing T02 in FIG. 5).

  When the control unit 32 shifts from the low power consumption mode to the normal operation mode, the control unit 32 drives the sensor 30 to detect an object (step S06 in FIG. 4). Thereafter, the control unit 32 determines whether or not the water is being discharged (step S07 in FIG. 4).

  When determining that the water has stopped, the control unit 32 determines whether or not the current detection result is sensed (step S08 in FIG. 4).

  When it is determined that the sensor 32 is not perceived, the control unit 32 stops the operation of the sensor 30 and shifts from the normal operation mode to the low power consumption mode, and returns to the process of step S04 (step S09 in FIG. 4, timing T03 in FIG. 5). ).

  On the other hand, if the control unit 32 determines that it is sensing, the controller 32 activates the open command signal S1 to open the solenoid valve 16 and performs water discharge control for discharging water from the faucet 13 (steps S10 and 6 in FIG. 4). Timing T11). After starting the discharge of water from the faucet 13, the control unit 32 returns the open command signal S1 to inactive, stops the operation of the sensor 30, and shifts from the normal operation mode to the low power consumption mode. The processing returns to step S04 (step S09 in FIG. 4 and timing T12 in FIG. 6).

  Further, when it is determined in step S07 that the water discharge is occurring, the control unit 32 determines whether or not the current detection result is non-sensing (step S11 in FIG. 4 and timing T13 in FIG. 6). If the control unit 32 determines that it is sensing, the control unit 32 stops the operation of the sensor 30 and shifts from the normal operation mode to the low power consumption mode, and returns to the process of step S04 (step S09 in FIG. 4, timing T14 in FIG. 6). .

  On the other hand, if the control unit 32 determines that it is not perceived, the control unit 32 activates the close command signal S2 to close the solenoid valve 16, and performs water stop control to stop the water discharge from the faucet 13 (FIG. 4). Step S12, timing T21 in FIG. After stopping the discharge of water from the faucet 13, the control unit 32 returns the close command signal S2 to inactive, stops the operation of the sensor 30, and shifts from the normal operation mode to the low power consumption mode. The processing returns to step S04 (step S09 in FIG. 4, timing T22 in FIG. 7).

  Hereinafter, the control unit 32 repeats the processing of Step S04 to Step S12 of FIG. Thereby, the discharge of water from the faucet 13 and the stop of the discharge of water are controlled by the control unit 32.

  As described above, according to the faucet device 10 according to the present embodiment, the controller unit 20 is connected to the first signal line L1 to return the control unit 32 from the low power consumption mode to the normal operation mode. The pulse generator 44 is inputted to the first signal line L1. Accordingly, it is not necessary to provide a dedicated signal line while providing the pulse generator 44 in the controller unit 20. Therefore, even when the sensor unit 18 and the controller unit 20 are arranged separately and the control unit 32 provided in the sensor unit 18 is periodically set to the low power consumption mode, the sensor unit 18 is increased in size and the number of parts. Thus, the faucet device 10 is provided that can input a signal from the outside to the control unit 32 without causing an increase in the above.

FIG. 8 is a circuit diagram illustrating a modification of the faucet device according to the first embodiment.
Note that components that are substantially the same in function and configuration as those in the above embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.
As shown in FIG. 8, in this example, the pulse generator 44 is connected to the emitter of the transistor Tr1, and is connected to the first signal line L1 via the resistor element R1 that connects the emitter and base of the transistor Tr1. ing.

  In this example, even when the pulse signal from the pulse generator 44 is input to the first signal line L1 to activate the open command signal S1, the open drive signal S3 can remain inactive. For this reason, in this example, it is not necessary to connect the pulse generator 44 to the third signal line L3. Therefore, in this example, the operation of the control unit 32 can be controlled with only one wiring, and the configuration of the faucet device 10 can be simplified.

FIG. 9 is a circuit diagram illustrating a modification of the faucet device according to the first embodiment.
As shown in FIG. 9, in this example, the pulse generation unit 44 is connected to the boost control unit 52a, and the pulse generation unit 44 controls the drive of the boost control unit 52a.

FIG. 10 is a timing chart showing a modification of the operation of the faucet device according to the first embodiment.
As shown in FIG. 10, the pulse generator 44 drives the boost controller 52a only when the open command signal S1 is active. That is, the pulse generation unit 44 stops driving the boost control unit 52a when the control unit 32 is in the low power consumption mode, and drives the boost control unit 52a when the control unit 32 operates in the normal operation mode.

  Thereby, compared with the case where the pressure | voltage rise control part 52a is always driven, power consumption can be suppressed more. In addition, since the boost control unit 52a is driven when the control unit 32 operates in the normal operation mode and relatively needs power, the power consumption is suppressed and the sensor unit 18 and the controller unit 20 are appropriately configured. Electric power can be supplied.

  In this case, the pulse width of the pulse signal generated by the pulse generator 44 may be set according to the capability of the booster circuit 52. Thereby, for example, the drive time of the boost control unit 52a can be secured appropriately, and power can be appropriately supplied from the boost circuit 52 to each unit. In addition, the drive time of the boost control unit 52a does not necessarily coincide with the time during which the pulse generation unit 44 activates the open command signal S1. For example, after the boost control unit 52a is driven, the drive of the boost control unit 52a may be stopped after a predetermined time has elapsed from the timing when the open designation signal S1 becomes active to inactive.

FIG. 11 is a circuit diagram illustrating a modification of the faucet device according to the first embodiment.
As shown in FIG. 11, in this example, the pulse generator 44 is connected to the drive capacitor 56. The voltage of the drive capacitor 56 is input to the pulse generator 44. In this example, the pulse generator 44 includes a voltage detector 44a. The voltage detector 44 a detects the voltage value of the drive capacitor 56. For example, the voltage detection unit 44a detects whether or not the voltage value of the drive capacitor 56 is equal to or less than a predetermined value.

FIG. 12 is a flowchart showing a modification of the operation of the faucet device according to the first embodiment.
FIG.13 and FIG.14 is a timing chart showing the modification of operation | movement of the faucet apparatus which concerns on 1st Embodiment.
In FIG. 12, the operations in steps S21 to S26 are substantially the same as the operations in steps S01 to S06 described with reference to FIG.

  As shown in FIGS. 12 to 14, in this example, the control unit 32 shifts from the low power consumption mode to the normal operation mode, drives the sensor 30 to detect the object, and then opens the open command signal. It is determined whether or not the active state of S1 is continued (step S27 in FIG. 12, timing T31 in FIG. 13, timing T41 in FIG. 14).

  As shown in FIGS. 13 and 14, the pulse generator 44 keeps the open command signal S <b> 1 active (predetermined state) when the voltage detector 44 a detects that the voltage value of the drive capacitor 56 is a predetermined value or less. In this case, the pulse generator 44 continues to drive the boost controller 52a. FIG. 13 shows an example of the operation when the voltage value of the drive capacitor 56 is reduced while the object is not being sensed (still water is stopped). FIG. 14 illustrates an example of an operation when a decrease in the voltage value of the drive capacitor 56 occurs during sensing of an object (water discharge).

  After determining that the opening command signal S1 is inactive after driving the sensor 30 and detecting the object, the control unit 32 subsequently determines whether or not the water discharge is in progress (FIG. 12). Step S28). Hereinafter, the operations in steps S29 to S33 are substantially the same as the operations in steps S08 to S12 described with reference to FIG.

  After determining that the opening command signal S1 is active after driving the sensor 30 and detecting the object, the control unit 32 stops the operation of the sensor 30 (steps S34 in FIG. 12, FIG. 13). Timing T32, timing T42 in FIG. 14).

  After stopping the sensor 30, the control unit 32 executes a shutdown process (step S35 in FIG. 12). For example, when the control unit 32 has a function of storing / updating the usage status of the user, detection information, information on the surrounding environment, and the like, the shutdown process is to complete the process related to the information. It is processing of. Thereby, various parameters of these information are stored in a nonvolatile memory in which the information is not volatilized even when the power is turned off, and it is possible to prevent abnormal operation when the faucet device 10 resumes operation.

  After executing the shutdown process, the control unit 32 determines whether or not the water is being discharged (step S36 in FIG. 12). When it is determined that the water discharge is in progress, the control unit 32 activates the close command signal S2 to close the solenoid valve 16 and performs water stop control for stopping the water discharge from the faucet 13 (step S37 in FIG. 4). , Timings T42 to T43 in FIG. As a result, for example, the electromagnetic valve 16 can be reliably closed before the electromagnetic valve 16 cannot be normally driven with a decrease in the voltage value of the drive capacitor 56.

  After performing the water stop control, the control unit 32 determines again whether or not the open command signal S1 is in an active state (step S38 in FIG. 12). Further, when it is determined in step S36 that the water is stopped, the control unit 32 determines again whether or not the open command signal S1 remains active without performing the water stop control.

  In the control unit 32, for example, the drive capacitor 56 is charged by driving the boost control unit 52a, the voltage value of the drive capacitor 56 becomes larger than a predetermined value, and the pulse generation unit 44 makes the open command signal S1 inactive. In this case, the mode shifts to the low power consumption mode and returns to the normal operation.

  In this example, if the time (pulse width) during which the pulse generation unit 44 activates the opening command signal S1 is longer than the time during which the control unit 32 drives the sensor 30 to detect the object, the process of step S27 is performed. In the determination, it is determined every time that the voltage value is reduced. Therefore, in this example, the pulse generation unit 44 determines whether the object is detected or not based on the detection result of the sensor 30 after the control unit 32 shifts from the low power consumption mode to the normal operation mode. The open command signal S1 is returned from active to inactive.

  On the other hand, when only the operation described with reference to FIG. 4 is performed, the time during which the pulse generation unit 44 activates the open command signal S1 is longer than the time during which the control unit 32 drives the sensor 30 to detect the object. May be longer. For example, when the time during which the pulse generation unit 44 activates the opening command signal S1 is longer than the time during which the control unit 32 drives the sensor 30 to detect the object, the process of step S10 in FIG. Then, after the control unit 32 waits for the pulse generation unit 44 to deactivate the open command signal S1, the open command signal S1 may be activated.

15 to 17 are circuit diagrams illustrating modifications of the faucet device according to the first embodiment.
In the example shown in FIG. 15, the pulse generator 44 is connected to the storage capacitor 50. In this example, the voltage of the storage capacitor 50 is input to the pulse generator 44. The voltage detection unit 44a detects the voltage value of the storage capacitor 50 and detects whether the voltage value of the storage capacitor 50 is equal to or less than a predetermined value.

  In the example shown in FIG. 16, the pulse generator 44 is connected to the battery 24. In this example, the voltage of the battery 24 is input to the pulse generator 44. The voltage detection unit 44a detects the voltage value of the battery 24 and detects whether or not the voltage value of the battery 24 is equal to or less than a predetermined value.

  In the example shown in FIG. 17, the pulse generator 44 is connected to the booster circuit 52. In this example, the output voltage of the booster circuit 52 is input to the pulse generator 44. The voltage detector 44a detects the output voltage value of the booster circuit 52, and detects whether or not the output voltage value of the booster circuit 52 is equal to or less than a predetermined value.

  As described above, the voltage value detected by the voltage detection unit 44a may be the voltage value of the storage capacitor 50, the voltage value of the battery 24, or the output voltage value of the booster circuit 52. The voltage detected by the voltage detection unit 44 a may be an arbitrary voltage of the power supply unit 46.

  In the above embodiment, the voltage detection unit 44a detects whether or not the voltage is equal to or lower than a predetermined value. Without being limited thereto, the voltage detection unit 44a may detect whether or not the voltage is equal to or lower than a predetermined value. In the above embodiment, the pulse generator 44 keeps the open command signal S1 active when the voltage detector 44a detects that the voltage value of the drive capacitor 56 is equal to or lower than a predetermined value. Without being limited thereto, the pulse generation unit 44 sets the first signal line L1 to a predetermined state in which the detection of the predetermined voltage can be transmitted to the control unit 32 when the voltage detection unit 44a detects the predetermined voltage. You only have to set it. The control unit 32 may instruct the controller unit 20 to execute the closing drive from the second signal line L2 when the first signal line L1 is in a predetermined state while water is being discharged from the faucet 13. .

FIG. 18 is a circuit diagram illustrating a modification of the faucet device according to the first embodiment.
As shown in FIG. 18, in this example, the pulse generator 44 is connected to the second signal line L2. In this example, the input terminal 32a of the control unit 32 is connected to the second signal line L2.

  Thus, the pulse generator 44 may output a pulse signal to the second signal line L2. The control unit 32 may shift from the low power consumption mode to the normal operation mode when the close command signal S2 of the second signal line L2 becomes active in the low power consumption mode.

  However, when the pulse generator 44 is connected to the second signal line L2 side that performs the closing drive, the solenoid valve 16 may not be appropriately closed due to a malfunction of the pulse generator 44 or the like. There is sex. Therefore, as shown in the above embodiments, the pulse generator 44 is preferably connected to the first signal line L1 side. As a result, there is a possibility that the opening drive cannot be performed properly, but the closing drive can be performed more reliably. For example, it is possible to suppress the faucet 13 and the electromagnetic valve 16 from remaining in a water discharge state. Therefore, the reliability of the faucet device 10 can be further improved.

(Second Embodiment)
FIG. 19 is a perspective view illustrating a toilet apparatus according to the second embodiment.
As shown in FIG. 19, the toilet device 100 (water discharge device) includes a toilet 102, a water supply channel 14, a solenoid valve 16, a sensor unit 18, and a controller unit 20. In addition, about the thing substantially the same as a faucet apparatus 10 demonstrated regarding the said 1st Embodiment on a function and a structure, a same sign is attached | subjected and detailed description is abbreviate | omitted.

  The toilet 102 has a concave bowl portion and a water discharge port (not shown) for discharging cleaning water to the bowl portion. The toilet bowl 102 ishes out the filth excreted in the bowl part by discharging the wash water supplied through the water supply channel 14 into the bowl part from the water outlet. That is, in this example, the toilet 102 functions as a water discharge unit. In other words, the toilet 102 is a Western-style seated toilet.

  In the toilet device 100 configured as described above, the sensor unit 18 and the controller unit 20 are separated from each other by providing the pulse generation unit 44 in the controller unit 20 in the same manner as in the first embodiment. Even when the control unit 32 provided in the unit 18 is periodically set to the low power consumption mode, an external signal is input to the control unit 32 without causing an increase in the size of the sensor unit 18 or an increase in the number of parts. A toilet device 100 is provided.

(Third embodiment)
FIG. 20 is an explanatory diagram illustrating a toilet apparatus according to the third embodiment.
As shown in FIG. 20, the toilet device 200 (water discharge device) includes a urinal 202, a water supply channel 14, a solenoid valve 16, a sensor unit 18, and a controller unit 20.

  The urinal 202 has a concave bowl portion and a water discharge port (not shown) for discharging cleaning water to the bowl portion. The urinal 202 flushes the surface of the bowl part by discharging the wash water supplied via the water supply channel 14 into the bowl part from the water outlet. That is, in this example, the urinal 202 functions as a water discharge unit.

  In the toilet device 200 configured as described above, the sensor unit 18 and the controller unit 20 are separated from each other by providing the pulse generation unit 44 in the controller unit 20 in the same manner as in the first embodiment. Even when the control unit 32 provided in the unit 18 is periodically set to the low power consumption mode, an external signal is input to the control unit 32 without causing an increase in the size of the sensor unit 18 or an increase in the number of parts. A toilet device 200 is provided.

  As described above, the water discharging device may be a faucet device, a toilet device using a toilet, or a toilet device using a urinal. The water discharger is not limited to these, and may be any water discharger that controls the water discharge by detecting an object.

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 shape, size, material, arrangement, and the like of each element included in the faucet device 10 and the toilet devices 100, 200 are not limited to those illustrated, and can be changed as appropriate.
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.

  DESCRIPTION OF SYMBOLS 10 Water faucet device, 11 Basin, 12 Wash counter, 13 Water faucet (water discharging part), 13a Water outlet, 14 Water supply path, 15 Drainage path, 16 Solenoid valve, 17 Connection cable, 18 Sensor part, 20 Controller part, 22 Power generation section, 24 battery, 30 sensor, 32 control section, 40 drive control section, 42 valve drive circuit, 44 pulse generation section, 44a voltage detection section, 46 power supply section, 50 storage capacitor, 52 boost circuit, 54 limiting resistance, 56 Drive capacitor, 58 Charging voltage limiter, 100, 200 Toilet device, 102 Urinal, 202 Urinal

Claims (4)

A water discharge part having a water discharge port for discharging water;
A water supply channel for leading water from a water supply source to the water outlet;
A self-holding solenoid valve that opens and closes the water supply channel;
A sensor unit for detecting an object;
A controller unit that is provided separately from the sensor unit and that opens and closes the solenoid valve according to a detection result of the sensor unit;
A power supply unit for supplying power to each of the solenoid valve, the sensor unit, and the controller unit;
With
The sensor unit is
A sensor for detecting the object;
An open command signal is connected to the controller unit via a first signal line and a second signal line, and an open command signal for instructing execution of an open drive for opening the electromagnetic valve based on a detection result of the sensor. A control unit that inputs from one signal line to the controller unit, and inputs a closing command signal that commands execution of a closing drive for closing the solenoid valve from the second signal line to the controller unit;
Have
The control unit has a normal operation mode in which the detection operation of the object is performed and a low power consumption mode in which power consumption is lower than that in the normal operation mode, and performs the detection operation in the normal operation mode. Then, transition to the low power consumption mode, returning from the low power consumption mode to the normal operation mode according to the input of an external signal,
The controller unit is connected to one of the first signal line and the second signal line, and outputs a pulse signal for returning the control unit from the low power consumption mode to the normal operation mode. And a water discharge device comprising a pulse generator for inputting to the one of the second signal lines.   The water discharge device according to claim 1, wherein the pulse generator is connected to the first signal line. The pulse generation unit includes a voltage detection unit that detects a voltage of the power supply unit, and when the voltage detection unit detects a predetermined voltage, the first signal line is set to a predetermined state,
The controller instructs the controller unit to execute the closing drive from the second signal line when the first signal line is in the predetermined state while water is being discharged from the water discharger. The water discharging apparatus according to claim 1 or 2, characterized in that. The power supply unit includes a booster circuit that boosts an input voltage to a predetermined output voltage,
The water discharge device according to any one of claims 1 to 3, wherein the pulse generator controls driving of the booster circuit.

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