Plumbing fixtures

Abstract

To provide a plumbing device capable of suppressing defects due to erroneous detection or erroneous operation of an operation part.SOLUTION: A plumbing device has an operation part allowing operation input by contact, a function part capable of executing at least one operation, and a control part to control the function part based on the operation input to the operation part. When detecting the operation input to the operation part, the control part makes the function part execute the operation. When a predetermined time elapses from the operation input to the operation part, the control part returns the function part to a state before the operation is executed.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] Aspects of the present invention generally relate to water-related devices.

Background Art

[0002] In recent years, in water-related devices such as washbasins, a stylish design with few irregularities has been demanded. Therefore, as an operation unit for operating a functional unit provided in a water-related device, an operation unit of a touch switch method with few irregularities has attracted attention. The operation unit of the touch switch method is an operation unit capable of operation input by contact. In Patent Document 1, a capacitance sensor is provided in an operation unit for operating the water discharge state from the water discharge port of a washbasin. For example, by providing a capacitance sensor in the operation unit, it is possible to detect a change in the capacitance value when the user touches it, and perform operations such as the operation of the functional unit and the setting change of the functional unit.

[0003] However, in the operation unit of the touch switch method, unlike the operation unit of the mechanical switch method such as a tact switch, there is a possibility of erroneously detecting the adhesion of water droplets to the operation unit as an operation by the user. Further, in the operation unit of the touch switch method, unlike the operation unit of the mechanical switch method such as a tact switch, it is difficult for the user to recognize the contact to the operation unit, so it is difficult for the user to notice an erroneous operation to the operation unit. When an erroneous detection or an erroneous operation occurs, an unintended operation or setting change may be performed in the functional unit. As a result, there is a possibility that problems such as water continuing to be discharged after the user leaves or the user being mislead into thinking that the water-related device has failed may occur.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The aspects of the present invention are based on the recognition of the above problems and aim to provide a plumbing device that can suppress malfunctions caused by false detection or erroneous operation of the control unit. [Means for solving the problem]

[0006] The first invention is a plumbing device comprising: an operating unit that can be operated by contact; a functional unit that can perform at least one operation; and a control unit that controls the functional unit based on the operation input to the operating unit, wherein when the control unit detects an operation input to the operating unit, it causes the functional unit to perform the operation, and after a predetermined time has elapsed since the operation input to the operating unit, it returns the functional unit to the state it was in before the operation was performed.

[0007] This plumbing device allows the functional unit to be returned to its state before the operation was performed if an operation is executed due to an incorrect input caused by, for example, water droplet adhesion or misoperation. This prevents unintended operation or unintended setting changes of the functional unit due to false detection or misoperation of the control unit from continuing. Therefore, malfunctions caused by false detection or misoperation of the control unit can be suppressed.

[0008] The second invention is a plumbing device in which, in the first invention, when the control unit detects a first operation input to the operation unit, it causes the function unit to execute the operation, and if, after the function unit has executed the operation, it does not detect a second operation input to the operation unit within the predetermined time from the first operation input, it returns the function unit to the state before the operation was executed.

[0009] According to this plumbing device, if a second operation input to the control unit is not detected within a predetermined time after the first operation input, the functional unit is returned to the state before the operation was executed. This prevents unintended operation or unintended setting changes of the functional unit due to false detection or incorrect operation of the control unit. In other words, if a second operation input is not made within a predetermined time after the first operation input, it is determined that the first operation input was a false detection or incorrect operation of the control unit, and the execution of the operation can be canceled. Therefore, malfunctions caused by false detection or incorrect operation of the control unit can be suppressed.

[0010] The third invention is a water supply device characterized in that, in the second invention, the functional unit has a water dispensing unit for dispensing water, the water dispensing unit has a water dispensing section for dispensing water and a hand detection sensor for detecting the user's hand, the water dispensing unit is capable of performing an automatic water dispensing mode in which water is discharged from the water dispensing section based on the detection result of the hand detection sensor, and a continuous water dispensing mode in which water is continuously discharged from the water dispensing section, the operation being a switch from the automatic water dispensing mode to the continuous water dispensing mode, the control unit switches the water dispensing unit to the continuous water dispensing mode when it detects the first operation input to the operation section while the water dispensing unit is in the automatic water dispensing mode, and when it does not detect the second operation input to the operation section within a predetermined time from the first operation input while the water dispensing unit is in the continuous water dispensing mode, it returns the water dispensing unit to the automatic water dispensing mode.

[0011] According to this plumbing device, if the water dispensing unit is in continuous water dispensing mode and a second operation input to the control unit is not detected within a predetermined time after the first operation input, the water dispensing unit is returned to automatic water dispensing mode, thereby preventing unintended continuation of continuous water dispensing mode. This prevents water from continuing to be dispensed after the user has left.

[0012] The fourth invention is a plumbing device in which, in the first invention, the control unit causes the functional unit to execute the operation when the state of operation input to the operation unit continues for a first predetermined time or longer, and when the state of operation input to the operation unit continues for a second predetermined time or longer than the first predetermined time, the functional unit returns to the state before the operation was executed.

[0013] According to this plumbing device, if the input to the control unit continues for a second predetermined time or longer after the operation is initiated, the functional unit is returned to the state before the operation was executed. This prevents unintended operation or unintended setting changes of the functional unit due to false detection or erroneous operation of the control unit. In other words, if the input to the control unit continues for a second predetermined time or longer after the operation is initiated, it is determined that this input was a false detection or erroneous operation of the control unit, and the execution of the operation can be canceled. Therefore, malfunctions caused by false detection or erroneous operation of the control unit can be suppressed.

[0014] The fifth invention is a water supply device characterized in that, in the fourth invention, the functional unit has a functional water discharge unit that discharges functional water, the functional water discharge unit is capable of executing a periodic discharge mode that discharges the functional water periodically, the operation is switching the periodic discharge mode on and off, the control unit switches the periodic discharge mode on and off when an operation input to the operation unit is started and the state of operation input continues for a first predetermined time or longer, and cancels the switching of the periodic discharge mode on and off when an operation input to the operation unit is started and the state of operation input continues for a second predetermined time or longer.

[0015] According to this plumbing device, if the operation input to the control unit continues for a second predetermined time or longer, the switching between the on and off of the periodic discharge mode is canceled, thereby preventing the periodic discharge mode setting from being changed unintentionally. This prevents the user from mistakenly believing that the plumbing device is malfunctioning.

[0016] The sixth invention is a plumbing device characterized in that, in any one of the first to fifth inventions, the device further comprises a notification unit for notifying the status of the functional unit, the functional unit has a water discharge unit for discharging water, the water discharge unit is capable of performing a hot water preparation operation for preparing to discharge hot water, and the control unit, upon detecting an operation input to the operation unit, performs the hot water preparation operation in the water discharge unit, and the notification unit notifies that the hot water preparation operation is being performed from the start of the hot water preparation operation until the end of the hot water preparation operation.

[0017] With this plumbing system, the notification unit notifies the user that the hot water preparation operation is in progress from the start to the end of the operation. This allows the user to easily recognize that the hot water preparation operation is being performed, even if, for example, the hot water preparation operation is mistakenly started due to a false detection or misoperation of the control unit and water is discharged from the water outlet. This helps to prevent the user from mistakenly believing that the plumbing system is malfunctioning. [Effects of the Invention]

[0018] According to an aspect of the present invention, a plumbing device is provided that can suppress malfunctions caused by false detection or erroneous operation of the control unit. [Brief explanation of the drawing]

[0019] [Figure 1] This is a perspective view illustrating a plumbing fixture according to an embodiment. [Figure 2] This is a front view illustrating a part of a plumbing system according to an embodiment. [Figure 3] This is a front view illustrating the interface section of a plumbing device according to an embodiment. [Figure 4] This is a block diagram illustrating a plumbing system according to an embodiment. [Figure 5] This is a flowchart illustrating an example of the operation of a plumbing device according to the embodiment. [Figure 6]FIG. 6(a) and FIG. 6(b) are timing charts showing an example of the operation of the water circulation device according to the embodiment. [Figure 7] It is a flowchart showing an example of the operation of the water circulation device according to the embodiment. [Figure 8] FIG. 8(a) and FIG. 8(b) are timing charts showing an example of the operation of the water circulation device according to the embodiment. [Figure 9] It is a flowchart showing an example of the operation of the water circulation device according to the embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0020] Hereinafter, the embodiments will be described with reference to the drawings. In each drawing, the same components are denoted by the same reference numerals, and detailed descriptions thereof will be omitted as appropriate.

[0021] FIG. 1 is a perspective view illustrating a water circulation device according to the embodiment. As shown in FIG. 1, the water circulation device 10 includes a washbasin 12, a faucet device 14, a support base 16, and a mirror cabinet 18. In this example, the water circulation device 10 is a washstand.

[0022] In the following, as an example of the water circulation device according to the embodiment, a washstand will be described as an example. However, the water circulation device may be any device having at least a water discharge portion, and is not limited to a washstand. The water circulation device according to the embodiment may be, for example, a faucet device provided in a kitchen or a washbasin provided in a toilet room.

[0023] In the present specification, the descriptions of "upper", "lower", "right", and "left" refer to the upper, lower, right, and left with reference to a person who views the water circulation device 10 in front of the water circulation device 10. In the present specification, the direction from the water circulation device 10 toward a person in front of the water circulation device 10 is defined as the "front" direction, and the opposite direction is defined as the "rear" direction.

[0024] The washbasin 12 has a wash bowl 22 and a back guard portion 24. The wash bowl 22 is formed in a concave shape that is recessed downwards. The wash bowl 22 has a drain opening 26. The drain opening 26 is provided at the bottom of the wash bowl 22. The drain opening 26 is connected to a drain pipe and drains the water discharged into the wash bowl 22 into the drain pipe. The wash bowl 22 has a drainage slope that is inclined downwards toward the drain opening 26.

[0025] The back guard portion 24 extends upward from the rear end of the washbasin bowl 22. The back guard portion 24 can be provided as needed and is optional. The shape of the washbasin 12 may be any shape that has at least a washbasin bowl 22.

[0026] The support base 16 is placed on the floor F of the building structure. For example, the support base 16 is placed on the floor of the room where the plumbing fixture 10 is installed (such as a washroom or dressing room). The washbasin 12 is placed on the support base 16. The support base 16 supports the washbasin 12. The support base 16 has, for example, a main body 16a and two drawers 16b and 16c. The main body 16a is, for example, a roughly rectangular box with openings at the front and top. The top opening of the main body 16a is closed by the washbasin 12. At least a part of the washbasin bowl 22 enters the main body 16a through the top opening of the main body 16a.

[0027] Each drawer 16b and 16c is a roughly rectangular box-shaped structure with an opening at the top. Each drawer 16b and 16c is supported by the main body 16a so as to be movable back and forth, and moves between a storage position (shown in Figure 1) where it is housed within the main body 16a and a drawer position where it is pulled out forward from the main body 16a. When each drawer 16b and 16c is in the storage position, it closes the front opening of the main body 16a. When each drawer 16b and 16c is in the drawer position, it is possible to store items inside.

[0028] Thus, the support base 16 also functions as a cabinet capable of storing items. In other words, the support base 16 is a lower cabinet (floor cabinet). The number of drawers is not limited to two; it may be one or three or more. Furthermore, the support base 16 is not limited to a drawer-type cabinet; it may also be a cabinet with doors.

[0029] The support base 16 does not necessarily have to have a storage function. The support base 16 can have any configuration that is capable of supporting the washbasin 12. The washbasin 12 may also be directly attached to the wall W of the building structure (for example, the wall surface of a bathroom or dressing room). In other words, the support base 16 can be provided as needed and can be omitted.

[0030] The faucet device 14 is positioned above the washbasin 22 and the backguard 24. The faucet device 14 discharges water towards the washbasin 22 of the washbasin 12. For example, the upper end of the backguard 24 may be in contact with the unit case 46 of the faucet device 14. The faucet device 14 is attached directly or indirectly to the wall W of the building structure by fixing members such as bolts. The faucet device 14 may also be attached directly or indirectly to the backguard 24 or the mirror cabinet 18, for example.

[0031] The mirror cabinet 18 is positioned above the faucet device 14. The mirror cabinet 18 has an upper cabinet 30 and three mirror doors 31 to 33. Mirrors 31a to 33a are provided on the front of each of the mirror doors 31 to 33. The number of mirror doors on the mirror cabinet 18 is not limited to three; it may be one, two, or four or more.

[0032] The mirror cabinet 18 is attached to a support structure such as a wall W of the building frame by fastening members such as bolts. However, the mirror cabinet 18 may also be attached to and supported by a support structure other than the wall W (for example, a separately provided counter or panel, or a support base 16, etc.).

[0033] In this example, the faucet unit 14 is separate from the washbasin 12 and the mirror cabinet 18. The faucet unit 14 does not have to be directly fixed to the washbasin 12 and the mirror cabinet 18. The faucet unit 14 can be removed from the building structure without removing the washbasin 22 from the support base 16 or the mirror cabinet 18 from the support wall W or other support. This makes maintenance of the faucet unit 14 easier. The faucet unit 14 may also be integrated with the washbasin 12 and the mirror cabinet 18.

[0034] Figure 2 is a front view illustrating a part of a plumbing system according to an embodiment. As shown in Figure 2, the faucet device 14 includes a water outlet section 42, a flow rate adjustment section 44, and a unit case 46.

[0035] The unit case 46 is the outer casing (enclosure) of the faucet device 14. The unit case 46 houses the control unit and functional units, which will be described later. The water outlet 42 is provided in the unit case 46 and discharges water toward the washbasin 22. The water outlet 42 is a so-called spout with a water outlet.

[0036] The flow rate adjustment unit 44 adjusts the flow rate of water discharged from the water outlet 42. The flow rate adjustment unit 44 also adjusts the temperature of the water discharged from the water outlet 42. The flow rate adjustment unit 44 has a flow rate adjustment lever 44a. The flow rate adjustment unit 44 adjusts the flow rate and temperature of the water discharged from the water outlet 42 in response to the user's operation of the flow rate adjustment lever 44a. The manner in which the flow rate and temperature are adjusted in the flow rate adjustment unit 44 is not limited to the flow rate adjustment lever 44a, but may be any manner in which the flow rate and temperature can be adjusted.

[0037] The water outlet 42 is connected to the water supply pipe and the hot water supply pipe via a hot and cold water mixing unit or the like in the internal space of the unit case 46 or the support base 16. The water discharged from the water outlet 42 is, for example, tap water. The temperature of the water discharged from the water outlet 42 may be adjusted by an adjustment unit separate from the flow rate adjustment unit 44. The flow rate adjustment unit 44 only needs to be able to adjust the flow rate of the water discharged from the water outlet 42.

[0038] The unit case 46 covers at least a portion of the water discharge section 42 and the flow rate adjustment section 44. The unit case 46 is, for example, a box shape extending in the left-right direction. The water discharge section 42 is attached to the unit case 46 directly or indirectly. The unit case 46 holds at least a portion of the water discharge section 42 and the flow rate adjustment section 44 within its internal space.

[0039] The water outlet 42 is located at the bottom of the unit case 46 and discharges water toward the washbasin 22 below. In this example, the water outlet 42 is mounted on the bottom of the unit case 46 so as to protrude forward and downward from the bottom surface 46b of the unit case 46. At least a portion of the water outlet 42 may be built into the unit case 46. The water outlet 42 may be connected to a flexible hose and be removable from the unit case 46.

[0040] The flow rate adjustment lever 44a of the flow rate adjustment unit 44 is located at the bottom of the unit case 46 and extends downward. The flow rate adjustment lever 44a is pivotally supported at its upper end so that it can swing, for example, in the front-to-back direction and the left-to-right direction. For example, by swinging the flow rate adjustment lever 44a in the front-to-back direction, the flow rate of water discharged from the water discharge unit 42 is adjusted, and by swinging the flow rate adjustment lever 44a in the left-to-right direction, the temperature of the water discharged from the water discharge unit 42 is adjusted.

[0041] The faucet device 14 may further have a functional water discharge unit 52. The functional water discharge unit 52 discharges functional water having a disinfecting effect into the washbasin 22. The functional water discharge unit 52 is located at the bottom of the unit case 46 and discharges functional water downwards. For example, the functional water discharge unit 52 discharges functional water towards the drain 26 of the washbasin 22.

[0042] In the faucet device 14, for example, by discharging functional water from the functional water discharge unit 52 into the washbasin 22, the growth of bacteria in the drain 26 of the washbasin 22 and inside the drain 26 can be suppressed. In the plumbing device 10 and the faucet device 14, for example, the drain 26 and the inside of the drain 26 can be disinfected, keeping the washbasin 12 clean. Furthermore, disinfection can also be performed on toothbrushes, cups, etc., by discharging functional water onto them.

[0043] The functional water discharge unit 52 sprays functional water onto the washbasin 22 in a mist form, for example. The functional water discharge unit 52 is, for example, a mist nozzle. The outer diameter (spread width) of the mist of functional water sprayed from the functional water discharge unit 52 is larger than the opening diameter of the spray nozzle of the functional water discharge unit 52. The functional water discharge unit 52 sprays functional water in a conical shape, for example. This allows the functional water to adhere to a wide area of ​​the washbasin 22, for example, and disinfects the washbasin 12 more effectively. The form of functional water discharged from the functional water discharge unit 52 is not limited to a mist; it may also be in the form of droplets or a stream.

[0044] The control unit 70 (see Figure 4) is housed inside the unit case 46. The control unit 70 includes, for example, an electrical circuit that controls the functions (operation) of the faucet device 14. More specifically, the control unit 70 controls, for example, the temperature of the water discharged from the water outlet 42, the discharge and shut-off of water from the water outlet 42, and the discharge and shut-off of water from the functional water discharge 52.

[0045] As shown in Figure 2, the faucet device 14 further has an interface section 61. The interface section 61 is provided on the front surface 46f of the unit case 46. In this example, the interface section 61 is provided on the front surface 46Lf of the projection 46L that protrudes forward. The interface section 61 is electrically connected to the control unit 70.

[0046] Hereinafter, the portion of the faucet device 14 related to the discharge of water from the water outlet 42 will be referred to as the water discharge unit 40. The water discharge unit 40 includes, for example, the water outlet 42 and the flow rate adjustment unit 44 (see Figure 4). Furthermore, the portion of the faucet device 14 related to the discharge of functional water from the functional water discharge unit 52 will be referred to as the functional water discharge unit 50. The functional water discharge unit 50 includes, for example, the functional water discharge unit 52 (see Figure 4).

[0047] Figure 3 is a front view illustrating the interface section of a plumbing device according to an embodiment. Figure 3 shows an enlarged view of region R1 shown in Figure 2. As shown in Figure 3, the interface unit 61 has an operation unit 63 and a display unit 65.

[0048] The operation unit 63 receives user input and transmits it to the control unit 70. This input is, for example, an input for operating the operation (function) of a functional unit controlled by the control unit 70. For example, the operation unit 63 is a switch or sensor, etc., for the user to control the operation (function) of the faucet device 14. When the operation unit 63 receives an operation input, an operation signal corresponding to that input is transmitted to the control unit 70. When the control unit 70 receives the operation signal, it controls the operation (function) corresponding to that operation signal.

[0049] Any device capable of receiving operation input by contact (i.e., capable of inputting an operation signal to the control unit 70 by contact) can be used for the operation unit 63. For example, the operation unit 63 is a touch switch capable of receiving operation input by contact. Capacitive sensors, microwave sensors, millimeter-wave sensors, infrared (photoelectric) sensors, ultrasonic sensors, etc., can be used for the operation unit 63. The operation unit 63 may also be a device capable of receiving operation input by proximity. In other words, the operation unit 63 may be one that allows operation input without contact by waving a hand over it.

[0050] In this example, a circuit board having a capacitive switch electrically connected to the control unit 70 by a harness or the like is located inside the unit case 46. As an operation input, when a user touches a predetermined area 63r on the front surface 46Lf of the unit case 46, the operation input is detected by the capacitive switch. Then, an operation signal is transmitted from the capacitive switch to the control unit 70 in accordance with that operation input. In such a case, the predetermined area 63r may be considered as part of the operation section 63. In other words, the operation section 63 may include a part of the unit case 46.

[0051] Multiple operating units 63 may be provided. In this example, as shown in Figure 3, the operating units 63 include a hot water preparation switch 63a, an automatic water discharge switch 63b, a functional water switch 63c, and a lock switch 63d.

[0052] The hot water preparation switch 63a is used to switch the temperature of the water discharged from the water outlet 42. When an operation input is received on the hot water preparation switch 63a, the faucet device 14 (water outlet unit 40) performs a hot water preparation operation. During the hot water preparation operation, the water outlet 42 automatically discharges water until the discharged water is hot water (for example, about 30°C). For example, as will be described later with respect to Figure 4, the control unit 70 controls the opening and closing of the solenoid valves 80 and 81 (see Figure 4) that supply water or hot water to the water outlet 42, and the operation of the electric instant water heater 104 (see Figure 4). In this way, the control unit 70 makes the water discharged from the water outlet 42 hot water.

[0053] Furthermore, the hot water preparation switch 63a may be used to change the temperature of the water discharged in automatic water discharge mode. Changing the temperature of the water discharged in automatic water discharge mode is done, for example, by performing an operation input to the hot water preparation switch 63a for a long period of time (touching it for a predetermined time or longer).

[0054] The automatic water dispensing switch 63b is used to switch between automatic water dispensing mode and continuous water dispensing mode. In automatic water dispensing mode, the faucet device 14 (water dispensing unit 40) dispenses water from the water dispensing section 42 based on the detection result of the hand detection sensor 76. The hand detection sensor 76 detects, for example, the user's hand located below the water dispensing section 42. As a result, in automatic water dispensing mode, when the user extends their hand below the water dispensing section 42, water is dispensed from the water dispensing section 42. For example, as will be described later with respect to Figure 4, in automatic water dispensing mode, the control unit 70 opens and closes the solenoid valves 80 and 81 based on the detection result of the hand detection sensor 76. More specifically, in automatic water dispensing mode, the control unit 70 closes the solenoid valves 80 and 81 when the hand detection sensor 76 does not detect the user's hand, and opens the solenoid valves 80 and 81 when the hand detection sensor 76 detects the user's hand. As a result, the user can use water simply by waving their hand over the dispenser, without having to operate the flow rate adjustment lever 44a. On the other hand, in continuous water discharge mode, the water discharge unit 40 continues to discharge water from the water discharge section 42. In other words, in continuous water discharge mode, the water discharge unit 40 discharges water from the water discharge section 42 without relying on the detection result of the hand detection sensor 76. For example, as will be described later with respect to Figure 4, in continuous water discharge mode, the control unit 70 continuously opens the solenoid valves 80 and 81.

[0055] The functional water switch 63c is used to switch the flow of functional water from the functional water discharge unit 52 to stop. The faucet device 14 (functional water discharge unit 50) discharges functional water from the functional water discharge unit 52 in response to the user's input to the functional water switch 63c. The faucet device 14 (functional water discharge unit 50) sprays functional water for a predetermined time (for example, 10 seconds) in response to the input to the functional water switch 63c, and automatically stops spraying the functional water after the predetermined time has elapsed. For example, as will be described later with respect to Figure 4, in response to the input to the functional water switch 63c, the control unit 70 controls the functional water generation unit 88 built into the faucet device 14 and controls the opening and closing of the solenoid valve 86 that supplies functional water to the functional water discharge unit 52. The faucet device 14 (functional water discharge unit 50) may, for example, spray functional water with the first input to the functional water switch 63c and stop spraying functional water with the second input to the functional water switch 63c.

[0056] Furthermore, the functional water switch 63c may be used to switch the periodic discharge mode on and off. The faucet device 14 (functional water discharge unit 50) periodically discharges functional water when the periodic discharge mode is on. In other words, when the periodic discharge mode is on, the faucet device 14 (functional water discharge unit 50) discharges functional water from the functional water discharge section 52 at predetermined intervals, regardless of any input to the functional water switch 63c. Switching the periodic discharge mode on and off is performed, for example, by making an input to the functional water switch 63c for a long period of time (continuing to touch it for a predetermined time or longer).

[0057] The lock switch 63d is used to switch the lock mode on and off. When the lock mode is on, the faucet device 14 restricts operation based on the user's input to the control unit 63. For example, when the lock mode is on, the control unit 70 does not execute the operation (function) corresponding to the operation signal received from the control unit 63. Alternatively, for example, when the lock mode is on, the control unit 63 does not accept the user's input. Switching between the lock mode on and off is performed, for example, by making an operation input to the lock switch 63d for a long period of time (touching it for a predetermined time or longer).

[0058] The display unit 65 displays various information from the control unit 70 to the user. The information displayed by the display unit 65 may be, for example, information about the operating status of the faucet device 14. The information displayed by the display unit 65 may also be arbitrary information such as the time and date.

[0059] The display unit 65 uses a light-emitting element such as an LED (Light Emitting Diode). The display unit 65 displays information, for example, by turning the light on, off, flashing, and changing colors. The display unit 65 may also use a display device such as a liquid crystal display or an organic EL display.

[0060] In this example, a substrate having a light-emitting element electrically connected to the control unit 70 is placed inside the unit case 46. Light from the light-emitting element passes through a predetermined area 65r of the unit case 46, causing a display on the front surface 46f. In this case, the predetermined area 65r may be considered as part of the display unit 65.

[0061] Multiple display units 65 may be provided. In this example, as shown in Figure 3, the display units 65 include a first water temperature display unit 65a, a second water temperature display unit 65b, an automatic water discharge display unit 65c, a function water display unit 65d, and a lock display unit 65e.

[0062] The first water temperature display unit 65a and the second water temperature display unit 65b display information about the temperature of the water discharged from the water outlet 42. The faucet device 14 detects the temperature of the water discharged from the water outlet 42 and displays information about the detected temperature using the first water temperature display unit 65a or the second water temperature display unit 65b. The first water temperature display unit 65a lights up, for example, in red. The second water temperature display unit 65b lights up, for example, in green. For example, the first water temperature display unit 65a lights up in response to a signal from the control unit 70 if the water temperature is high (for example, about 45°C) or higher. The second water temperature display unit 65b lights up in response to a signal from the control unit 70 if the water temperature is above a predetermined temperature (for example, about 30°C). The first water temperature display unit 65a and the second water temperature display unit 65b turn off in response to a signal from the control unit 70 if the water temperature is below a predetermined temperature (for example, about 30°C). The second water temperature display unit 65b flashes in response to a signal from the control unit 70 when the faucet device 14 (water discharge unit 40) is performing a hot water preparation operation.

[0063] The automatic water discharge indicator unit 65c lights up in response to a signal from the control unit 70 when the automatic water discharge mode is active. The automatic water discharge indicator unit 65c turns off in response to a signal from the control unit 70 when the continuous water discharge mode is active.

[0064] The functional water indicator unit 65d lights up when the periodic dispensing mode is ON, in response to a signal from the control unit 70. The functional water indicator unit 65d turns off when the periodic dispensing mode is OFF, in response to a signal from the control unit 70.

[0065] The lock indicator unit 65e lights up when the lock mode is ON, in response to a signal from the control unit 70. The lock indicator unit 65e turns off when the lock mode is OFF, in response to a signal from the control unit 70.

[0066] If the front surface 46f of the unit case 46 is provided with guide markings (for example, borders made by printing or indentations) to indicate a predetermined area 63r where the operation unit 63 accepts input, and a predetermined area 65r where the display unit 65 displays information, then the area (section) indicated by such markings may be considered part of the interface unit 61. If at least a part of the interface unit 61 is provided on the front surface 46f of the unit case 46, then the interface unit 61 can be considered to be provided on the front surface 46f of the unit case 46.

[0067] If there are multiple operation units 63 and display units 65, the operation units 63 and display units 65 may be grouped together in one section of the front panel 46f, or they may be distributed in multiple locations. In other words, in a front view, the interface unit 61 may be in one location or in two or more locations.

[0068] Figure 4 is a block diagram illustrating a plumbing system according to an embodiment. As shown in Figure 4, the faucet device 14 further includes a control unit 70, a hand detection sensor 76, solenoid valves 80 and 81, a branch fitting 82, a temperature sensor 84, a solenoid valve 86, and a functional water generation unit 88. These are, for example, installed inside the unit case 46.

[0069] Furthermore, the faucet device 14 includes a water discharge unit 40 for discharging water from a water discharge section 42, and a functional water discharge unit 50 for discharging functional water from a functional water discharge section 52. The water discharge unit 40 includes a water discharge section 42, a flow rate adjustment section 44, solenoid valves 80 and 81, a hand detection sensor 76, and a temperature sensor 84. The functional water discharge unit 50 includes a functional water discharge section 52, a functional water generation section 88, and a solenoid valve 86.

[0070] The control unit 70 controls each part of the water supply system 10. The control unit 70 is connected to the operation unit 63 (hot water preparation switch 63a, automatic water dispensing switch 63b, functional water switch 63c, lock switch 63d) and the display unit 65 (first water temperature display unit 65a, second water temperature display unit 65b, automatic water dispensing display unit 65c, functional water display unit 65d, lock display unit 65e). The control unit 70 controls the operation of each part, such as the first water temperature display unit 65a, second water temperature display unit 65b, automatic water dispensing display unit 65c, functional water display unit 65d, and lock display unit 65e, in response to operation inputs from the operation unit 63. The control unit 70 is a control circuit including, for example, a microcontroller.

[0071] The hand detection sensor 76 detects the user's hand. The hand detection sensor 76 detects a hand that is located in the area below the unit case 46 and near the water outlet 42. For example, the hand detection sensor 76 detects a hand that is within a radius of 100 millimeters (mm) from the spout of the water outlet 42. The hand detection sensor 76 detects, for example, a user's hand that is extended into or above the washbasin 22. The hand detection sensor 76 detects, for example, a user's hand that is extended between the washbasin 22 and the water outlet 42. The hand detection sensor 76 is located inside the unit case 46 or inside the water outlet 42. However, the position of the hand detection sensor 76 may be any position that can detect a user's hand extended towards the water outlet 42.

[0072] The hand detection sensor 76 is connected to the control unit 70 and inputs the detection result to the control unit 70. For example, an infrared distance measuring sensor having a light-emitting unit and a light-receiving unit can be used as the hand detection sensor 76. For example, a pyroelectric sensor or an ultrasonic sensor may also be used as the hand detection sensor 76. The hand detection sensor 76 can be any sensor capable of non-contact detection of the human body or hands based on electromagnetic waves such as infrared rays or signal waves such as ultrasonic waves.

[0073] In automatic water dispensing mode, the control unit 70 discharges water from the water dispensing unit 42 in response to the detection of a hand by the hand detection sensor 76. Also in automatic water dispensing mode, the control unit 70 stops dispensing water from the water dispensing unit 42 in response to the cessation of hand detection by the hand detection sensor 76. Thus, in automatic water dispensing mode, the control unit 70 automatically discharges water from the water dispensing unit 42 in response to the detection result of the hand detection sensor 76.

[0074] Solenoid valve 80 is connected to a hot water source HS, such as a hot water supply pipe, via a shut-off valve 90. Solenoid valve 81 is connected to a water supply source WS, such as a cold water supply pipe, via a branch fitting 82 and a shut-off valve 91. Solenoid valves 80 and 81 are connected to a flow rate adjustment unit 44. Solenoid valves 80 and 81 are also connected to a control unit 70. The control unit 70 controls the opening and closing of solenoid valves 80 and 81. By opening solenoid valves 80 and 81, water supplied from the water supply source WS and hot water supplied from the hot water supply source HS are supplied to the flow rate adjustment unit 44.

[0075] The flow rate adjustment unit 44 includes a flow rate adjustment lever 44a and a flow rate adjustment valve 44b. The flow rate adjustment lever 44a is connected to the flow rate adjustment valve 44b and adjusts the opening amount of the flow rate adjustment valve 44b. Based on the opening amount set by the flow rate adjustment lever 44a, the flow rate adjustment valve 44b adjusts the flow rates of water supplied from the water supply source WS and hot water supplied from the hot water supply source HS. The flow rate adjustment valve 44b then mixes the water and hot water after flow rate adjustment and supplies it to the water discharge unit 42. This adjusts the flow rate and temperature of the water discharged from the water discharge unit 42.

[0076] The control unit 70 controls the opening and closing of the solenoid valves 80 and 81 according to the detection result of the hand detection sensor 76. As a result, water with adjusted flow rate and temperature is discharged from the water outlet 42 in response to the detection of a hand by the hand detection sensor 76.

[0077] The temperature sensor 84 is installed in the path between the water discharge section 42 and the flow rate adjustment section 44, and detects the temperature of the water discharged from the water discharge section 42. The temperature sensor 84 is connected to the control unit 70, and the detection result is input to the control unit 70. The control unit 70 displays the detection result of the temperature sensor 84 using either the first water temperature display unit 65a or the second water temperature display unit 65b.

[0078] The plumbing system 10 is further equipped with an electric water heater 104. The electric water heater 104 is connected to the hot water source and supplies hot water generated in a tank to the faucet device 14 until the water heater is turned on and hot water is supplied from the hot water source. The electric water heater 104 has an electric heater and a tank and temporarily supplies hot water that has been preheated in the tank to the faucet device 14. When hot water is supplied from the water heater, the supply of hot water from the tank is stopped, and hot water is supplied directly from the hot water source to the faucet device 14. The electric water heater 104 is housed, for example, inside a support base 16.

[0079] The plumbing system 10 is further equipped with an electric water heater 106. The electric water heater 106 is connected by a branch from the water source, receives water from the water source, and supplies the generated hot water to the faucet system 14. For example, the electric water heater 106 is a hot water source HS. The electric water heater 106 has an electric heater that heats the water supplied from the water source and supplies it to the faucet system 14. Some electric water heaters instantly heat the supplied water and supply hot water, while others have a tank that heats the water in the tank and supplies it. The electric water heater 106 is housed, for example, inside a support base 16.

[0080] The solenoid valve 86 is connected to the water supply source WS via a branch fitting 82 and a stopcock 91. The solenoid valve 86 is connected to the functional water generation unit 88. The solenoid valve 86 is also connected to the control unit 70. The control unit 70 controls the opening and closing of the solenoid valve 86. By opening the solenoid valve 86, water supplied from the water supply source WS is supplied to the functional water generation unit 88.

[0081] The functional water generation unit 88 generates functional water from water (tap water) supplied from the solenoid valve 86 and supplies the generated functional water to the functional water discharge unit 52. The functional water generation unit 88 is also connected to the control unit 70. The generation of functional water in the functional water generation unit 88 is controlled by the control unit 70.

[0082] The control unit 70 opens the solenoid valve 86 and activates the functional water generation unit 88 in response to the user's input to the functional water switch 63c. As a result, functional water is discharged from the functional water discharge unit 52 into the washbasin 22 in response to the user's input to the functional water switch 63c.

[0083] The functional water generation unit 88 includes, for example, an electrolytic cell. An anode plate and a cathode plate are provided inside the electrolytic cell. Based on a signal transmitted from the control unit 70, the functional water generation unit 88 electrolyzes tap water or non-potable water flowing inside the electrolytic cell. Here, tap water contains chloride ions. Chloride ions are present in water sources (for example, groundwater, dam water, river water, etc.) as, for example, sodium chloride (NaCl) or calcium chloride (CaCl2). Therefore, hypochlorous acid is produced by electrolyzing chloride ions. As a result, the water electrolyzed in the functional water generation unit 88 (electrolyzed water) changes into a liquid containing hypochlorous acid (functional water). Hypochlorous acid functions, for example, as a deodorizing or sterilizing component. The liquid containing hypochlorous acid can reduce general bacteria, etc.

[0084] Furthermore, the functional water generation unit 88 in this embodiment is not limited to generating a solution containing hypochlorous acid. The functional water generated in the functional water generation unit 88 may contain metal ions such as silver ions or copper ions. Alternatively, the functional water generated in the functional water generation unit 88 may contain electrolytic chlorine or ozone. Alternatively, the functional water generated in the functional water generation unit 88 may be acidic water or alkaline water. Moreover, the functional water generation unit 88 is not limited to an electrolytic cell unit having an electrolytic cell, an anode plate, and a cathode plate.

[0085] The plumbing device 10 has a functional unit. The operation of the functional unit is controlled by a control unit 70. The functional unit includes, for example, an electrically controllable component by the control unit 70. The functional unit includes, for example, at least one of a water discharge unit 40 and a functional water discharge unit 50.

[0086] The functional unit is capable of performing at least one operation. The operation of the functional unit includes, for example, switching modes. The operation of the functional unit includes, for example, switching from a first mode to a second mode, switching from a second mode to a first mode, and switching between a first mode and a second mode. The operation of the functional unit may also include, for example, switching a mode on and off.

[0087] When the control unit 70 detects an operation input to the operation unit 63, it causes the function unit to execute an operation, and after a predetermined time has elapsed since the operation input to the operation unit 63, it performs control to return the function unit to the state it was in before the operation was executed.

[0088] This type of control allows the functional unit to be returned to its state before the operation was performed if an operation is executed due to an incorrect input, such as water droplet adhesion or misoperation. This prevents unintended operation or unintended setting changes of the functional unit due to false detection or misoperation of the operation unit 63 from continuing. Therefore, malfunctions caused by false detection or misoperation of the operation unit 63 can be suppressed.

[0089] The control unit 70 can perform, for example, at least one of the first control operation and the second control operation described below as such control.

[0090] The first control operation is a control that returns the system to the state before the operation was performed if there is no second operation input within a predetermined time from the first operation input. More specifically, in the first control operation, when the control unit 70 detects the first operation input to the operation unit 63, it causes the function unit to execute an operation. After the function unit has executed the operation, if it does not detect a second operation input to the operation unit 63 within a predetermined time from the first operation input, it returns the function unit to the state before the operation was performed.

[0091] In this way, if a second operation input to the operation unit 63 is not detected within a predetermined time from the first operation input, the function unit can be returned to the state before the operation was executed, thereby preventing unintended operation or unintended setting changes of the function unit due to false detection or erroneous operation of the operation unit 63 from continuing. In other words, if a second operation input is not made within a predetermined time from the first operation input, it can be determined that the first operation input was a false detection or erroneous operation of the operation unit 63, and the execution of the operation can be canceled. Therefore, malfunctions caused by false detection or erroneous operation of the operation unit 63 can be suppressed.

[0092] The second control operation is a control that returns the system to its state before the operation was executed if the operation input continues for a predetermined period of time or longer. More specifically, in the second control operation, the control unit 70 causes the function unit to execute an operation if the operation input to the operation unit 63 continues for a first predetermined period of time or longer than the first predetermined period, and returns the function unit to its state before the operation was executed if the operation input to the operation unit 63 continues for a second predetermined period of time or longer than the first predetermined period.

[0093] In this way, if the state in which an operation input is made to the operation unit 63 continues for a second predetermined time or longer, the function unit is returned to the state before the operation was executed, thereby preventing unintended operation or unintended setting changes of the function unit due to false detection or erroneous operation of the operation unit 63 from continuing. In other words, if the state in which an operation input is made to the operation unit 63 continues for a second predetermined time or longer, it is determined that this operation input was a false detection or erroneous operation of the operation unit 63, and the execution of the operation can be canceled. Therefore, malfunctions caused by false detection or erroneous operation of the operation unit 63 can be suppressed.

[0094] The first control operation will be explained in more detail below, using the case where the functional unit has a water discharge unit 40 as an example. As described above, the water discharge unit 40 can perform an automatic water discharge mode in which water is discharged from the water discharge section 42 based on the detection result of the hand detection sensor 76, and a continuous water discharge mode in which water is continuously discharged from the water discharge section 42. The operation of the water discharge unit 40 that is the target of the first control operation is switching from the automatic water discharge mode to the continuous water discharge mode.

[0095] Figure 5 is a flowchart showing an example of the operation of a plumbing device according to this embodiment. As shown in Figure 5, when the water discharge unit 40 is in automatic water discharge mode, the control unit 70 discharges water from the water discharge section 42 based on the detection result of the hand detection sensor 76 (step S101). The control unit 70 repeats step S102 until it detects a first operation input to the automatic water discharge switch 63b (step S102: No).

[0096] When the control unit 70 detects a first operation input to the automatic water discharge switch 63b (step S102: Yes), it switches the water discharge unit 40 to continuous water discharge mode (step S103) and starts measuring time using a timer (step S104). The control unit 70 continues to discharge water from the water discharge section 42 while the water discharge unit 40 is in continuous water discharge mode.

[0097] Next, the control unit 70 determines whether a predetermined time Ta has elapsed since the first operation input (step S105). The predetermined time Ta is, for example, 1 minute or more and 5 minutes or less (approximately 3 minutes). If the predetermined time Ta has not elapsed since the first operation input (step S105: No), the control unit 70 determines whether a second operation input to the automatic water discharge switch 63b has been detected (step S106).

[0098] If no second operation input is detected to the automatic water dispensing switch 63b (step S106: No), the control unit 70 returns to step S105. The control unit 70 repeats steps S105 and S106 until a predetermined time Ta has elapsed since the first operation input or until a second operation input to the automatic water dispensing switch 63b is detected.

[0099] When the control unit 70 detects a second operation input to the automatic water discharge switch 63b (step S106: Yes), it switches the water discharge unit 40 to automatic water discharge mode (step S107) and resets the timer's time measurement (step S108).

[0100] If a predetermined time Ta has elapsed since the first operation input (step S105: Yes), the control unit 70 returns the water discharge unit 40 to automatic water discharge mode (step S107) and resets the time measurement by the timer (step S108). In other words, if a second operation input to the automatic water discharge switch 63b is not detected within a predetermined time Ta from the first operation input (step S105: Yes and step S106: No), the control unit 70 returns the water discharge unit 40 to automatic water discharge mode (step S107) and resets the time measurement by the timer (step S108).

[0101] Thus, in the first control operation, if, after switching from the automatic water discharge mode to the continuous water discharge mode by the first operation input, there is no second operation input for switching from the continuous water discharge mode to the automatic water discharge mode within a predetermined time Ta, the control unit 70 determines that there is a false detection or error in the operation unit 63 and returns the water discharge unit 40 to the automatic water discharge mode.

[0102] Figures 6(a) and 6(b) are timing charts showing an example of the operation of a plumbing device according to the embodiment. As shown in Figure 6(a), when the water discharge unit 40 is in automatic water discharge mode and a first operation input to the automatic water discharge switch 63b is detected at timing t11, the control unit 70 switches the water discharge unit 40 to continuous water discharge mode. Then, when the water discharge unit 40 is in continuous water discharge mode and a second operation input to the automatic water discharge switch 63b is detected at timing t12, the control unit 70 switches the water discharge unit 40 to automatic water discharge mode. Timing t12 is a time before timing t13, which is after a predetermined time Ta has elapsed from timing t11 when the first operation input was detected. In other words, when the water discharge unit 40 is in continuous water discharge mode and an operation input (second operation input) to the automatic water discharge switch 63b is detected before the predetermined time Ta has elapsed, the control unit 70 switches the water discharge unit 40 to automatic water discharge mode.

[0103] On the other hand, as shown in Figure 6(b), if the water discharge unit 40 is in continuous water discharge mode and does not detect a second operation input to the automatic water discharge switch 63b until a predetermined time Ta has elapsed, the control unit 70 returns the water discharge unit 40 to automatic water discharge mode.

[0104] In this way, if the water discharge unit 40 is in continuous water discharge mode and does not detect a second operation input to the operation unit 63 (automatic water discharge switch 63b) within a predetermined time Ta from the first operation input, the water discharge unit 40 can be returned to automatic water discharge mode, thereby preventing the continuous water discharge mode from continuing unintentionally. This prevents water from continuing to be discharged after the user has left.

[0105] The second control operation will be explained in more detail below, using the case where the functional unit has a functional water discharge unit 50 as an example. As described above, the functional water discharge unit 50 is capable of executing a periodic discharge mode in which functional water is discharged periodically. The operation of the functional water discharge unit 50 that is the target of the second control operation is the switching of the periodic discharge mode on and off.

[0106] Figure 7 is a flowchart showing an example of the operation of a plumbing device according to this embodiment. As shown in Figure 7, the control unit 70 determines whether or not an operation input to the functional water switch 63c has started (step S201). The control unit 70 repeats step S201 until it detects the start of an operation input to the functional water switch 63c (step S201: No). When it detects the start of an operation input to the functional water switch 63c (step S201: Yes), the control unit 70 starts measuring time using the timer (step S202).

[0107] Next, the control unit 70 determines whether or not an operation input to the functional water switch 63c is continuing (step S203). If an operation input to the functional water switch 63c is continuing (step S203: Yes), the control unit 70 determines whether or not a first predetermined time Tb1 has elapsed since the start of the operation input (step S204). The first predetermined time Tb1 is, for example, 3 seconds or more and 10 seconds or less (about 5 seconds).

[0108] If the first predetermined time Tb1 has not elapsed since the start of the operation input (step S204: No), the control unit 70 returns to step S203. The control unit 70 repeats steps S203 and S204 until the operation input is completed or the first predetermined time Tb1 has elapsed since the start of the operation input.

[0109] If the operation input continues for a first predetermined time Tb1 or longer from the start of the operation input (step S203: Yes and step S204: Yes), the control unit 70 switches the periodic discharge mode on and off (step S205). More specifically, if the periodic discharge mode of the functional water discharge unit 50 is on and the operation input continues for a first predetermined time Tb1 or longer from the start of the operation input, the control unit 70 switches the periodic discharge mode of the functional water discharge unit 50 to the off state. If the periodic discharge mode of the functional water discharge unit 50 is off and the operation input continues for a first predetermined time Tb1 or longer from the start of the operation input, the control unit 70 switches the periodic discharge mode of the functional water discharge unit 50 to the on state.

[0110] Next, the control unit 70 determines whether or not an operation input to the functional water switch 63c is continuing (step S206). If an operation input to the functional water switch 63c is continuing (step S206: Yes), the control unit 70 determines whether or not a second predetermined time Tb2 has elapsed since the start of the operation input (step S207). The second predetermined time Tb2 is, for example, 1 minute or more and 10 minutes or less (about 5 minutes).

[0111] If the second predetermined time Tb2 has not elapsed since the start of the operation input (step S207: No), the control unit 70 returns to step S206. The control unit 70 repeats steps S206 and S207 until the operation input is completed or the second predetermined time Tb2 has elapsed since the start of the operation input.

[0112] If the operation input continues for a second predetermined time Tb2 or longer from the start of the operation input (step S206: Yes and step S207: Yes), the control unit 70 cancels the on / off switching of the periodic discharge mode performed in step S205 (step S208) and resets the time measurement by the timer (step S209). More specifically, if in step S205 the periodic discharge mode of the functional water discharge unit 50 is switched from the ON state to the OFF state, the control unit 70 returns the periodic discharge mode of the functional water discharge unit 50 from the OFF state to the ON state in step S208. If in step S205 the periodic discharge mode of the functional water discharge unit 50 is switched from the OFF state to the ON state, the control unit 70 returns the periodic discharge mode of the functional water discharge unit 50 from the ON state to the OFF state in step S208.

[0113] In step S203, if the operation input to the functional water switch 63c is completed within the first predetermined time Tb1 (step S203: No), the control unit 70 dispenses the functional water (step S210) and resets the time measurement by the timer (step S209).

[0114] In step S206, if the operation input to the functional water switch 63c is completed within the second predetermined time Tb2 (step S206: No), the control unit 70 resets the time measurement by the timer without canceling the switching of the periodic discharge mode on and off performed in step S205 (step S209).

[0115] Thus, in the second control operation, if the control unit 70 completes the operation input to the functional water switch 63c before the first predetermined time Tb1 has elapsed from the start of the operation input, it determines that a short operation input has been made to the functional water switch 63c and dispenses functional water. Also, if the operation input to the functional water switch 63c continues for more than the first predetermined time Tb1 from the start of the operation input, and the operation input to the functional water switch 63c completes before the second predetermined time Tb2 has elapsed from the start of the operation input, the control unit 70 determines that a long operation input has been made to the functional water switch 63c and switches the periodic discharge mode on and off. On the other hand, if the operation input to the functional water switch 63c continues for more than the second predetermined time Tb2 from the start of the operation input, the control unit 70 determines that there has been a false detection or false operation of the operation unit 63 and cancels the switching of the periodic discharge mode on and off.

[0116] Figures 8(a) and 8(b) are timing charts showing an example of the operation of a plumbing device according to the embodiment. As shown in Figure 8(a), with the periodic discharge mode off, at timing t21, the control unit 70 detects the start of an operation input to the functional water switch 63c, and if the operation input continues for a first predetermined time Tb1 or longer, the control unit 70 switches the periodic discharge mode to the ON state at timing t22, which is after the first predetermined time Tb1 has elapsed from timing t21. Then, when the operation input to the functional water switch 63c ends at timing t23, which is before timing t24, which is after the second predetermined time Tb2 has elapsed from timing t21, the control unit 70 maintains the periodic discharge mode in the ON state.

[0117] Similarly, with the periodic discharge mode ON, at timing t25, the control unit 70 detects the start of an operation input to the functional water switch 63c, and if the operation input continues for a first predetermined time Tb1 or longer, the control unit 70 switches the periodic discharge mode OFF at timing t26, which is after the first predetermined time Tb1 has elapsed from timing t25. Then, when the operation input to the functional water switch 63c ends at timing t27, which is before timing t28, which is after the second predetermined time Tb2 has elapsed from timing t25, the control unit 70 maintains the periodic discharge mode OFF.

[0118] On the other hand, as shown in Figure 8(b), if the periodic discharge mode is off and an operational input to the functional water switch 63c continues for a second predetermined time Tb2 or longer, the control unit 70 switches the periodic discharge mode to the ON state at timing t22, when a first predetermined time Tb1 has elapsed since the start of the operational input. However, at timing t24, when a second predetermined time Tb2 has elapsed since the start of the operational input, the periodic discharge mode is returned to the OFF state.

[0119] Similarly, if the periodic discharge mode is ON and an operational input to the functional water switch 63c continues for a second predetermined time Tb2 or longer, the control unit 70 switches the periodic discharge mode to the OFF state at timing t26, when a first predetermined time Tb1 has elapsed since the start of the operational input, but then switches the periodic discharge mode back to the ON state at timing t28, when a second predetermined time Tb2 has elapsed since the start of the operational input.

[0120] In this way, if the state of operation input to the control unit 63 (functional water switch 63c) continues for a second predetermined time Tb2 or longer after the operation input is started, the switching between the on and off of the periodic discharge mode is canceled, thereby preventing the setting of the periodic discharge mode from being changed unintentionally. This prevents the user from being misled into thinking that the water supply equipment has malfunctioned.

[0121] Figure 9 is a flowchart showing an example of the operation of a plumbing device according to this embodiment. As shown in Figure 9, the control unit 70 determines whether or not an operation input has been made to the hot water preparation switch 63a (step S301). The control unit 70 repeats step S301 until it detects an operation input to the hot water preparation switch 63a (step S301: No).

[0122] When the control unit 70 detects an operation input to the hot water preparation switch 63a (step S301: Yes), it starts the hot water preparation operation in the water discharge unit 40 (step S302) and the notification unit starts notifying that the hot water preparation operation is in progress (step S303). The notification that the hot water preparation operation is in progress is made, for example, by the flashing of the second water temperature display unit 65b. In this case, the second water temperature display unit 65b functions as a notification unit.

[0123] Next, the control unit 70 determines whether the hot water preparation operation is complete (step S304). For example, the control unit 70 determines that the hot water preparation operation is complete when the water temperature detected by the temperature sensor 84 reaches a predetermined value (for example, about 30°C) or higher. The control unit 70 repeats step S304 until the hot water preparation operation is complete (step S304: No).

[0124] Once the hot water preparation operation is complete (Step S304: Yes), the control unit 70 terminates the notification by the notification unit (Step S305).

[0125] In this way, by having the notification unit notify that the hot water preparation operation is in progress from the start to the end of the hot water preparation operation, even if the hot water preparation operation is mistakenly started due to a false detection or misoperation of the control unit 63 and water is discharged from the water discharge unit 42, the user can easily recognize that the water is being discharged due to the hot water preparation operation. This prevents the user from mistakenly believing that the plumbing equipment has malfunctioned.

[0126] In the example above, the notification unit provides notification by light, but in this embodiment, the notification unit is not limited to providing notification by light. For example, the notification unit may provide notification by sound.

[0127] As described above, according to the embodiment, a plumbing device is provided that can suppress malfunctions caused by false detection or incorrect operation of the control unit.

[0128] Embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. Modifications made by those skilled in the art to the above-described embodiments are also included within the scope of the present invention, as long as they retain the features of the present invention. For example, the shape, dimensions, materials, arrangement, and installation configuration of each element of a plumbing fixture are not limited to those exemplified and can be modified as appropriate. Furthermore, the elements of each of the embodiments described above can be combined to the extent technically possible, and these combinations are also included within the scope of the present invention insofar as they include the features of the present invention. [Explanation of symbols]

[0129] 10. Plumbing fixtures 12 Washbasin 14. Faucet device 16 Support stand 16a Main body 16b, 16c drawers 18 Mirror Cabinet 22 Washbasin 24 Backguard section 26 Drain 30 Upper Cabinet 31, 32, 33 Mirror door 31a, 32a, 33a mirror 40 Water discharge unit 42 Water outlet 44 Flow rate adjustment section 44a Flow rate adjustment lever 44b Flow control valve 46 Unit Case 46b Bottom side 46f front 46L protrusion 46Lf front 50 Functional Water Dispensing Units 52 Functional water discharge part 61 Interface section 63 Operation section 63a Hot water preparation switch 63b Automatic water dispensing switch 63c Functional Water Switch 63d Lock switch 63r Predetermined area 65 Display section 65a 1st water temperature display section 65b 2nd water temperature display section 65c Automatic water discharge indicator 65d Functional water display section 65e Lock Indicator 65r specified area 70 Control Unit 76 Hand detection sensors 80, 81 Solenoid valves 82 Branch fittings 84 Temperature Sensor 86 Solenoid valve 88 Functional water generation section 90, 91 Shut-off valves 104 Electric Instant Water Heater 106 Electric water heater F floor HS hot water source W Wall WS water source

Claims

1. An operating unit that allows for input via contact, A functional unit capable of performing at least one operation, A control unit controls the functional unit based on the operation input to the operation unit, Equipped with, The functional unit has a functional water discharge unit that discharges functional water, The functional water dispensing unit is capable of performing a periodic dispensing mode in which the functional water is dispensed periodically. The aforementioned operation is the switching of the periodic discharge mode on and off. The control unit, If the operation input to the control unit is initiated and the state of operation input continues for a first predetermined time or longer, the periodic discharge mode is switched on and off. A plumbing device characterized in that, if the state of operation input to the control unit continues for a second predetermined time or longer than the first predetermined time, the switching of the periodic discharge mode on and off is canceled.

2. The control unit, When the first operation input to the operation unit is detected, the function unit is instructed to execute the operation. The plumbing device according to claim 1, characterized in that if, after the functional unit has performed the operation, a second operation input to the operational unit is not detected within the second predetermined time from the first operation input, the functional unit is returned to the state before the operation was performed.

3. The functional unit has a water discharge unit that discharges water, The water discharge unit comprises a water discharge section that discharges water and a hand detection sensor that detects the user's hands. The water discharge unit is capable of performing an automatic water discharge mode in which water is discharged from the water discharge section based on the detection result of the hand detection sensor, and a continuous water discharge mode in which water is continuously discharged from the water discharge section. The operation described above is a switch from the automatic water discharge mode to the continuous water discharge mode. The control unit, When the water discharge unit is in the automatic water discharge mode and detects the first operation input to the operation unit, the water discharge unit switches to the continuous water discharge mode. The plumbing device according to claim 2, characterized in that if the water discharge unit does not detect a second operation input to the operation unit within the second predetermined time from the first operation input while in the continuous water discharge mode, the water discharge unit returns to the automatic water discharge mode.

4. The system further includes a notification unit that notifies the status of the aforementioned functional unit, The functional unit has a water discharge unit that discharges water, The water discharge unit is capable of performing a hot water preparation operation to prepare for the discharge of hot water. The plumbing apparatus according to any one of claims 1 to 3, characterized in that when the control unit detects an operation input to the operation unit, it executes the hot water preparation operation in the water discharge unit, and the notification unit notifies that the hot water preparation operation is in progress from the start of the hot water preparation operation until the end of the hot water preparation operation.

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