CN108071137B

CN108071137B - Wash table

Info

Publication number: CN108071137B
Application number: CN201711096605.5A
Authority: CN
Inventors: 野田升作; 秋场恭兵; 吉冈恭平; 土屋贤司; 甲斐三典
Original assignee: Toto Ltd
Current assignee: Toto Ltd
Priority date: 2016-11-14
Filing date: 2017-11-09
Publication date: 2020-09-25
Anticipated expiration: 2037-11-09
Also published as: CN108071137A

Abstract

The invention provides a wash stand which can keep a basin clean while suppressing the discharge waste of functional water. The invention is a wash stand (1) capable of discharging tap water and functional water with sterilization function, characterized in that: a bowl part (2) having a water discharge port (2 a); a 1 st water discharge unit (4a) for discharging tap water to the bowl portion; a 2 nd water discharge part (4b) for discharging functional water having a sterilizing effect to the bowl part; an electromagnetic valve (30) for switching between water discharge and water stop from the 2 nd water discharge unit; a human body detection sensor (19) for detecting the approach of a user to the wash stand; and a control unit (40) for controlling the electromagnetic valve so as to prohibit the water discharge from the 2 nd water discharge unit when the human body detection sensor detects the approach of the user.

Description

Wash table

Technical Field

The invention relates to a wash platform, in particular to a wash platform capable of discharging tap water and functional water with a sterilization function

Background

A wash stand having a function of discharging functional water having a sterilizing action such as electrolytic water obtained by electrolyzing tap water is known. In such a sink, functional water having a sterilizing action is sprayed into the wash basin after the sink is used for washing the face, hands, or the like of a user. That is, functional water is sprayed into the wash basin after the user uses the wash stand, so that it is prevented that foreign germs washed off by the user using the wash stand to wash hands or the like adhere to the wash basin and propagate on the basin surface and the drain port of the wash basin.

Japanese patent application laid-open No. 2016 and 108733 (patent document 1) describes an automatic faucet device that automatically spouts water when a detected object is detected. In the automatic faucet device, when a detected object is detected, functional water is sprayed to the hand washing basin for a predetermined time, and then, tap water starts to be discharged. And then, stopping discharging the tap water when the detected object is not detected any more, and spraying the functional water to the hand basin for a set time after 3 seconds. Therefore, the breeding of the mixed bacteria on the basin surface and the water discharge port of the hand basin is prevented.

Patent document 1: japanese laid-open patent publication No. 2016-108733

Disclosure of Invention

Here, for example, when brushing teeth at a washbasin, the toothbrush is first moistened with a small amount of water, and then the water cup is filled with water for rinsing. Further, after brushing the teeth with the toothbrush, the surroundings of the mouth are washed while gargling, and finally the toothbrush, the cup for gargling, is washed with water. Thus, the user repeatedly discharges and stops the tap water only by using the wash stand for brushing teeth. When the actual use of the wash stand is considered, the frequent use of pouring out and stopping tap water is extremely increased by wetting the shaver, cleaning the shaver, washing the face, washing the contact lenses, and the like.

Thus, in the case of 1-time use of the wash basin by the user, functional water having a sterilizing effect is discharged every time the discharge and stop of tap water repeatedly occur many times, and thus a large amount of functional water is required for sterilizing the wash basin, which is not preferable from the viewpoint of water saving. In addition, in the above-described operation, particularly in the operation of wetting the toothbrush with a small amount of water, it is difficult to imagine that many of the unwanted bacteria are attached to the wash tub. Further, since the discharge of tap water is repeated a plurality of times in the cleaning operation of the toothbrush and the cup and the like immediately after the toothbrush is wetted with water at the time of starting tooth brushing, the sterilization effect of the functional water discharged after such an operation on the wash basin becomes little due to the discharge of tap water in the next operation. In addition, when functional water having a sterilizing effect is produced by electrolyzing tap water, there is a problem that electrodes used for electrolysis are wasted and the life of the electrodes is shortened.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wash stand that can keep a basin clean while suppressing waste of functional water discharged.

In order to solve the above problems, the present invention is a wash stand which can discharge tap water and functional water having a sterilizing effect, comprising: a basin part having a water outlet; a 1 st water discharge unit for discharging tap water to the bowl unit; a 2 nd water discharge part for discharging functional water having a sterilizing effect to the bowl part; an electromagnetic valve for switching between water discharge and water stop from the 2 nd water discharge unit; a human body detection sensor for detecting the approach of a user to the wash stand when the user approaches a range of a prescribed distance from the wash stand; and a control unit for opening the electromagnetic valve in response to a detection signal of the human body detection sensor to automatically discharge the functional water from the 2 nd water discharge unit, wherein when the human body detection sensor detects the approach of a user, the control unit prohibits the automatic water discharge from the 2 nd water discharge unit, and after a state where the human body detection sensor detects the approach of the user changes to a state where the approach of the user is not detected, the control unit opens the electromagnetic valve to perform the automatic water discharge from the 2 nd water discharge unit, wherein the washbasin further comprises a water discharge sensor for detecting the water discharge from the 1 st water discharge unit by detecting the approach of a detected object to the 1 st water discharge unit, and wherein when the human body detection sensor detects the approach of the user, even after the state where the approach of the user is detected by the human body detection sensor changes to a state where the approach of the user is not detected, the control unit does not perform automatic water discharge from the 2 nd water discharge unit, and the detection range of the human body detection sensor detects the front of the wash stand from the detection range of the water discharge sensor.

In the present invention thus constituted, tap water is discharged from the 1 st water discharge portion to the bowl portion having the water discharge port. On the other hand, the control unit controls the electromagnetic valve to switch between the discharge and stop of the functional water having a sterilizing action from the 2 nd water discharge unit. The human body detection sensor detects the approach of a user to the washbasin, and the control part prohibits the automatic water discharge from the 2 nd water discharge part when the human body detection sensor detects the approach of the user.

According to the present invention thus constituted, when the approach of the user to the wash stand is detected, the automatic discharge of the functional water from the 2 nd water discharge unit is prohibited, so that it is possible to prevent the functional water from being discharged in a situation where the possibility of the user restarting the water discharge from the 1 st water discharge unit is high, and it is possible to avoid the waste of the functional water. That is, if water is spouted from the 1 st water spouting portion again immediately after the functional water is spouted, the possibility of microbial contamination adhering to the bowl portion again is high, and the functional water needs to be spouted again after the water spouting is completed, and the functional water that was first spouted is wasted. According to the present invention, waste of such functional water can be avoided, and water saving can be achieved while propagation of miscellaneous bacteria at the pot portion and the drain port can be effectively suppressed. Further, when the electrolyzed water is used as the functional water, waste of the electrolyzed water can be suppressed, and therefore, consumption of the electrodes for generating the electrolyzed water and the like and waste of electric power can be suppressed.

In the present invention, it is preferable that the control unit opens the electromagnetic valve and performs automatic water discharge from the 2 nd water discharge unit after the state where the proximity of the user is detected by the human body detection sensor changes to the state where the proximity of the user is not detected.

According to the present invention thus constituted, functional water is automatically discharged from the 2 nd water discharge unit after the user approach is detected from the state in which the human body detection sensor detects the user approach has changed to the state in which the user approach has not been detected, so that functional water can be reliably discharged in a situation in which the user is less likely to start using the wash stand again immediately thereafter, and the functional water is not wasted, and the growth of undesired bacteria can be effectively suppressed.

In the present invention, it is preferable that the control unit is configured to measure a time during which the human body sensor continuously detects the approach of the user, and the automatic water discharge from the 2 nd water discharge unit is not executed when the time is shorter than a predetermined continuous approach time.

According to the present invention thus constituted, automatic water discharge from the 2 nd water discharge unit is not performed when the human body detection sensor continuously detects that the user is approaching for less than a predetermined continuous approach time, so that unnecessary functional water discharge can be avoided in a situation where unwanted bacteria do not adhere to the bowl portion, for example, when the user passes in front of the washbasin. As a result, water can be saved and the propagation of bacteria at the pot part and the drain port can be effectively inhibited.

In the present invention, it is preferable that the water discharge device further includes a water discharge sensor for detecting water discharge from the 1 st water discharge unit, and the control unit does not execute automatic water discharge from the 2 nd water discharge unit even after a state in which the user approach is detected by the human body detection sensor changes to a state in which the user approach is not detected when water discharge from the 1 st water discharge unit is not detected while the user approach is detected by the human body detection sensor.

According to the present invention thus constituted, when the water is not being discharged from the 1 st water discharge portion while the proximity of the user is detected by the human body detection sensor, the functional water is not automatically discharged, so that, for example, when the user uses the hair dryer in front of a wash platform, the functional water can be prevented from being discharged in a state where germs do not adhere to the bowl portion. As a result, water can be saved and the propagation of bacteria at the pot part and the drain port can be effectively inhibited.

In the present invention, it is preferable that the control unit causes the 2 nd water spouting unit to start spouting after a lapse of a predetermined standby time after a change from a state in which the human body detection sensor detects the approach of the user to a state in which the approach of the user is not detected.

According to the present invention thus constituted, the water discharge from the 2 nd water discharge portion is started after the predetermined standby time has elapsed after the human body detection sensor is in the non-detection state, and therefore, it is possible to prevent the functional water from being discharged in a situation where there is a high possibility that the user will reuse the wash stand in a short time, such as when the user leaves the wash stand while the wash stand is in use. As a result, water can be saved and the propagation of bacteria at the pot part and the drain port can be effectively inhibited.

In the present invention, it is preferable that the control unit resets the integration of the standby time when the state in which the human body detection sensor does not detect the approach of the user changes to the state in which the user approaches during the elapse of the predetermined standby time, and then integrates the standby time from a new start when the state in which the human body detection sensor detects the approach of the user changes to the state in which the user does not detect the approach of the user.

According to the present invention thus constituted, when the state in which the human body sensor detects the approach of the user is changed during the elapse of the predetermined standby time, the standby time is reset, and then when the state in which the human body sensor does not detect the approach of the user is changed, the standby time is newly integrated. Therefore, even when the user temporarily leaves the wash stand a plurality of times, the functional water can be prevented from being discharged and wasted, and the propagation of the mixed bacteria in the basin and the drain can be effectively inhibited while saving water.

In the present invention, it is preferable that the control unit closes the electromagnetic valve when the state of the human body detection sensor not detecting the approach of the user changes to the state of detecting the approach of the user while the electromagnetic valve is opened to automatically discharge the functional water from the 2 nd water discharge unit.

According to the present invention thus constituted, the electromagnetic valve is closed when the human body detection sensor detects the approach of the user during the automatic discharge of functional water from the 2 nd water discharge unit, so that the functional water can be prevented from being discharged in a situation where the user starts to use the wash stand. As a result, the user can use the wash stand naturally.

In the present invention, it is preferable that the control unit automatically discharges the functional water from a new start when the functional water discharge process of the 2 nd water discharge unit changes to a state in which the human body detection sensor detects the approach of the user and changes to a state in which the human body detection sensor does not detect the approach of the user again after the functional water discharge is interrupted.

According to the present invention thus constituted, when the state in which the human body sensor detects the approach of the user changes during the discharge of the functional water and the state in which the human body sensor does not detect the approach of the user changes again after the discharge of the functional water is interrupted, the functional water is automatically discharged from the beginning. Therefore, even if the wash stand is used after the functional water discharge is interrupted, the functional water is discharged from the beginning, so that a predetermined amount of functional water can be reliably discharged after the wash stand is used, and the growth of bacteria in the bowl and the drain can be suppressed.

In the present invention, it is preferable that the water dispenser further includes a manual discharge switch for discharging the functional water from the 2 nd water discharge unit for a predetermined time in response to a user operation, and the control unit does not execute the automatic discharge from the 2 nd water discharge unit when a state in which the proximity of the user is detected by the human body detection sensor changes to a state in which the proximity of the user is not detected while the functional water is discharged by the user operation of the manual discharge switch.

According to the present invention thus constituted, in the case where the human body detection sensor does not detect the approach of the user during the discharge of the functional water by the manual operation of the user, the automatic discharge of the functional water is not executed, and therefore, it is possible to avoid the repetition of the automatic discharge of the functional water and the sterilization by the manual operation of the user, and to prevent the discharge of the functional water from being wasted.

According to the wash stand of the present invention, it is possible to keep the bowl portion clean while suppressing waste of functional water discharged.

Drawings

Fig. 1 is a perspective view showing an overall appearance of a wash stand according to an embodiment of the present invention.

Fig. 2 is an enlarged perspective view of a faucet device unit provided in a washstand in an embodiment of the present invention.

Fig. 3 is a perspective view of the faucet device unit provided in the washstand in the embodiment of the present invention, as viewed obliquely from below.

Fig. 4 is a block diagram showing a water discharge system in the wash stand according to the embodiment of the present invention.

Fig. 5 is a flowchart showing the control of the electromagnetic valve for functional water by the controller provided in the wash stand according to the embodiment of the present invention.

Fig. 6 is a timing chart showing an example of control of the controller provided in the wash stand according to the embodiment of the present invention.

Fig. 7 is a timing chart showing another example of control of the controller provided in the wash stand according to the embodiment of the present invention.

Fig. 8 is a timing chart showing another example of control of the controller provided in the wash stand according to the embodiment of the present invention.

Fig. 9 is a flowchart showing a manual discharge process of functional water by the controller provided in the wash stand according to the embodiment of the present invention.

Fig. 10 is a time chart showing an example of the case where the functional water is manually discharged from the wash stand according to the embodiment of the present invention.

Fig. 11 is a view showing an operation portion of a faucet device in a washstand in a modified embodiment of the present invention.

Description of the symbols

1-a wash stand according to an embodiment of the present invention; 2-a basin part; 2 a-a water outlet; 4-water slug device unit; 4 a-the 1 st water discharge portion; 4 b-the 2 nd water discharge part; 6-lower cabinet; 8-upper cabinet; 10-flow, temperature regulating valve; 10 a-an operating lever; 12-operation switch (manual discharge switch); 14-a touch switch; 16-an LED for illumination; 18-proximity sensor (water spitting sensor); 19-a human detection sensor; 20 a-a water supply pipe; 20 b-a hot water supply pipe; 22 a-a water stop cock; 22 b-a water stop cock; 24 a-a filter; 24 b-a filter; 28 a-solenoid valve for water; 28 b-solenoid valve for hot water; 30-electromagnetic valve for functional water (electromagnetic valve); 32-pressure regulating valve; 34-a safety valve; 36-a check valve; 38-an electrolytic cell; 40-a controller (control section); 42-AC power supply; 50-an operating part; 52-a base part; 52 a-Hall element; 54-a lever; 54 a-magnet.

Detailed Description

Next, preferred embodiments of the present invention will be described with reference to the drawings.

First, the entire structure of the wash stand according to the embodiment of the present invention will be described with reference to fig. 1 to 4. Fig. 1 is a perspective view showing an overall appearance of a wash stand according to an embodiment of the present invention. Fig. 2 is an enlarged perspective view of a faucet device unit provided in a washstand in an embodiment of the present invention. Fig. 3 is a perspective view of the water faucet device unit as viewed obliquely from below. Fig. 4 is a block diagram showing a water discharge system in the wash stand according to the embodiment of the present invention.

As shown in fig. 1, a wash stand 1 according to an embodiment of the present invention includes: a basin part 2; a water faucet device unit 4 disposed above the bowl portion 2; a lower cabinet 6 disposed below the tub 2 to support the tub 2; and an upper cabinet 8 disposed above the hydrant unit 4.

The bowl portion 2 is a substantially rectangular wash basin, and has a drain port 2a provided on the back side of the center thereof and arranged to receive tap water discharged from the faucet device unit 4. In the present specification, "tap water" includes not only municipal water supplied from a tap water company but also well water used for washing faces, hands, and the like.

The faucet device unit 4 is a rectangular parallelepiped unit attached to the wall surface above the bowl portion 2, and incorporates an automatic faucet that discharges tap water toward the bowl portion 2 from the 1 st water discharge portion 4a provided below the unit. The detailed function and structure of the hydrant apparatus unit 4 will be described later.

The lower cabinet 6 is arranged below the basin part 2, is a cabinet for supporting the basin part 2 and is provided with 2 layers of drawers. Further, a device such as an electromagnetic valve for switching between the discharge and stop of tap water is housed in the lower tank 6. The details of the equipment housed in the lower cabinet 6 will be described later.

The upper tank 8 is a thin tank provided on the wall surface above the water faucet device unit 4, and a mirror is attached to the front surface thereof.

Next, the structure of the hydrant unit 4 will be described with reference to fig. 2 and 3.

As shown in fig. 2, the hydrant apparatus unit 4 includes: a 1 st water discharge portion 4 a; a 2 nd water discharge portion 4 b; a flow and temperature regulating valve 10; an operation switch 12; a touch switch 14; and an illumination LED 16.

The 1 st water discharge unit 4a is formed of a cylindrical member provided diagonally forward from the center of the lower surface of the faucet device unit 4, and is configured to discharge tap water for washing the face, hands, or the like toward the bowl portion 2. A proximity sensor 18 as a water discharge sensor is provided on the front side surface of the 1 st water discharge unit 4a, and is configured to detect the proximity of a detection target object such as a finger to the 1 st water discharge unit 4 a. Further, a human body detection sensor 19 that detects the approach of the user to the wash stand 1 is provided on the front surface of the faucet device unit 4. In the present embodiment, the 1 st water discharge unit 4a is inserted and configured to be extractable from the faucet device unit 4.

The 2 nd water discharge portion 4b is a water discharge portion provided in the vicinity of the 1 st water discharge portion 4a side, and is configured to spray (discharge) functional water having a sterilizing action toward the bowl portion 2 at a predetermined timing.

In the present embodiment, the proximity sensor 18 is an infrared sensor, and is configured to detect infrared rays reflected by a finger or the like approaching the 1 st water discharge unit 4a and detect the approach of the finger or the like. The human body detection sensor 19 is configured to detect the approach of the user when the user approaches within a range of a predetermined distance from the wash stand 1 in order to use the wash stand 1. In the present embodiment, a microwave sensor is used as the human body detection sensor 19, and the human body detection sensor 19 is configured to detect the approach of a human body in a range larger than a range in which the proximity sensor 18 detects the approach of a finger or the like. That is, the human body detection sensor 19 is configured to be able to detect a user located at a distance greater than the distance at which the proximity sensor 18 detects the proximity of a finger or the like. As the proximity sensor, any non-contact type sensor such as a microwave type sensor other than an infrared type sensor may be used, and as the human body detection sensor 19, any non-contact type sensor such as an infrared type sensor other than a microwave type sensor may be used.

The flow rate/temperature adjustment valve 10 is a so-called "one-handle faucet" that can mix supplied hot water and water at a predetermined ratio and adjust the outflow rate of the mixed hot and cold water, and is housed in the right end of the faucet device unit 4. An operation lever 10a is attached to the flow rate/temperature control valve 10, and the operation lever 10a protrudes downward from the lower surface of the faucet device unit 4. In the present embodiment, the flow rate of the cold and hot water discharged from the 1 st water discharge portion 4a can be adjusted by operating the operating lever 10a in the front-rear direction, and the temperature of the cold and hot water can be adjusted by operating in the left-right direction.

The operation switch 12 is a switch provided on the front left side of the faucet device unit 4. By operating the operation switch 12, the function of automatically discharging the functional water from the 2 nd water discharge unit 4b can be switched between on and off of the illumination LED 16. Further, by operating the operation switch 12, the user can manually discharge the functional water from the 2 nd water discharge unit 4b in addition to the automatic discharge of the functional water. Accordingly, the operation switch 12 functions as a manual discharge switch for discharging the functional water from the 2 nd water discharge unit 4b for a predetermined time in response to the user's operation.

The touch switch 14 is a switch provided on the front right side of the faucet device unit 4. By operating the touch switch 14, it is possible to switch whether or not to stop the water discharge from the 1 st water discharge unit 4a as the automatic water stopper to be automatically performed.

The illumination LEDs 16 are LEDs provided at 2 positions on the lower surface and the back side of the faucet device unit 4, and are configured to illuminate the hands of a user who uses the washbasin 1.

Next, a water and hot water supply system in the wash stand 1 according to the embodiment of the present invention will be described with reference to fig. 4.

As shown in fig. 4, the water supply system is provided with: a water supply pipe 20a for supplying tap water; a water stop cock 22a for cutting off tap water; a filter 24a for removing foreign matter mixed in the tap water; and a water solenoid valve 28a for switching the discharge and stop of the tap water from the 1 st water discharge unit 4 a. Also, the hot water supply system is provided with, in order from the upstream side: a hot water supply pipe 20b for supplying hot water from a water heater (not shown) or the like; a water stop plug 22b for cutting off hot water; a filter 24b for removing foreign matter and the like mixed therein; and a hot water solenoid valve 28b for switching the discharge and stop of the hot water from the 1 st water discharge unit 4 a.

The water and the hot water supplied by the water supply system and the hot water supply system are mixed at a predetermined ratio by the flow rate and temperature control valve 10, and discharged from the 1 st water discharge unit 4 a.

The opening and closing of the

solenoid valves

28a and 28b for water heating are controlled by a controller 40 as a control unit. That is, a detection signal from the proximity sensor 18 is sent to the controller 40. While the object to be detected, such as a finger, approaches the 1 st water discharge unit 4a, the controller 40 sends signals to the water solenoid valve 28a and the hot water solenoid valve 28b, opens these, and discharges cold and hot water from the water discharge unit 4 a. Further, information on whether or not the user approaches, which is detected by the human body detection sensor 19, is also sent to the controller 40, and this information is used for controlling the water discharge from the 2 nd water discharge unit 4 b. In the present embodiment, the controller 40 is configured by a microprocessor, a memory, an interface circuit, a solenoid valve driving circuit, and software for operating these (not shown). In addition, the controller 40 operates using power supplied from an AC power supply 42.

Next, a functional water generation and discharge system to be discharged from the 2 nd water discharge unit 4b will be described.

As shown in fig. 4, tap water supplied from the water supply pipe 20a is branched into 2 lines on the downstream side of the filter 24a, and one of the lines is connected to a water solenoid valve 28a, and the other line is connected to a functional water solenoid valve 30 which is an electromagnetic valve. As described below, functional water having a sterilizing action is produced from tap water passing through the functional water solenoid valve 30 and discharged from the 2 nd water discharge unit 4 b. The controller 40 controls opening and closing of the functional water solenoid valve 30 based on the control signal, and opens the functional water solenoid valve 30 at a predetermined timing to discharge the functional water from the 2 nd water discharge unit 4 b.

A pressure regulating valve 32, a safety valve 34, a check valve 36, and an electrolytic bath 38 are connected to the downstream side of the functional water solenoid valve 30 in this order from the upstream side.

The pressure regulating valve 32 is configured to regulate the pressure of the tap water flowing in from the functional water solenoid valve 30 and to discharge the tap water. The tap water flowing in from the functional water solenoid valve 30 is adjusted to a pressure suitable for mist spraying from the 2 nd water discharge unit 4b by the pressure regulating valve 32.

The safety valve 34 is configured to release tap water in the pipe line to the downstream side of the water solenoid valve 28a when the pressure in the pipe line for supplying functional water becomes equal to or higher than a predetermined pressure. For example, when the water discharge port of the 2 nd water discharge unit 4b is closed and the pressure in the pipe path rises rapidly, the safety valve 34 is opened to allow the water in the pipe path to flow out to the pipe path on the downstream side of the water solenoid valve 28a via the bypass flow path 34 a. Since the tap water passing through the bypass channel 34a is discharged from the 1 st water discharge unit 4a through the flow rate and temperature control valve 10, the pressure in the pipeline can be prevented from rising to a predetermined pressure or higher.

The check valve 36 is provided on a pipe between the safety valve 34 and the electrolytic cell 38, and is configured to prevent the electrolytic water in the electrolytic cell 38 from flowing backward toward the safety valve 34.

The electrolytic cell 38 is configured to electrolyze the supplied tap water to generate electrolytic water as functional water. The controller 40 controls the energization and the stoppage of the electrolytic bath 38, and applies a voltage between electrodes (not shown) in the electrolytic bath 38 at a predetermined timing to generate electrolyzed water. The electrolytic water used in the present embodiment may be any water having a sterilizing function that can be obtained by electrolysis. As a representative electrolyzed water, electrolyzed water containing hypochlorous acid may be mentioned. Since the feed water or the intermediate water generally contains chlorine ions, free chlorine is generated by electrolysis. Free chlorine exists as hypochlorous acid (HClO) in an acidic environment, and hypochlorous acid ions (ClO) exist in this mode as a more basic form than hypochlorous acid^-) The bactericidal power is about 10 times stronger. In addition, even in a neutral environment, a strong bactericidal activity of an intermediate level can be obtained. Thus, the water electrolyzed in the continuous electrolytic cell becomes sterilized water having a strong sterilizing power.

Although the above-mentioned tap water (top water or intermediate water) which is generally used contains chloride ions, when used in a region having a low chloride ion concentration or when strong sterilization is required, chloride ions can be supplemented by adding a salt such as common salt.

As the electrode for chlorine generation, an electrode in which a conductive base material has a chlorine generating catalyst function or a conductive material composed of a chlorine generating catalyst is used. Depending on the type of the chlorine generating catalyst, there are, for example, iron-based electrodes such as ferrite, palladium-based electrodes, ruthenium-based electrodes, iridium-based electrodes, platinum-based electrodes, ruthenium-tin-based electrodes, palladium-platinum-based electrodes, iridium-platinum-based electrodes, ruthenium-platinum-based electrodes, iridium-platinum-tantalum-based electrodes, and the like. The electrode having a chlorine generating catalytic action on the conductive base material is advantageous in terms of production cost because the base material portion serving as a structure can be made of an inexpensive material such as titanium or stainless steel.

The chlorine may be hypohalous acid obtained by electrolyzing water containing halogen ions.

As another electrolyzed water, silver ion water obtained by using silver as an electrode may be mentioned. Silver ions are adsorbed to enzymes in the cell membrane of bacteria, and inhibit the action of the enzymes, and thus it is considered that the bacteria cannot sustain life. And the coating also has the function of coating the contacted surface of the base material, so that bacteria are difficult to propagate on the surface of the base material. Since silver ions plate the surface of the base material, adhesion of bacteria can be prevented, and the silver ions have bactericidal activity, the proliferation of bacteria on the surface of the base material can be effectively suppressed. In this case, the combination with a cleaning method for increasing the replacement rate of the drain trap can suppress the stick-slip and odor of the drain port for a long period of time.

In addition, by using lead dioxide (β type) as an electrode for electrolysis in particular, various types of electrolyzed water such as ozone water which generates oxygen on the anode side and ozone at a high concentration can be suitably used.

The sterilized water other than the electrolyzed water may, for example, be an aqueous solution in which various sterilized components are dissolved. As the dissolved sterilization component, any of solid, liquid, and gas can be used. When a liquid sterilization component is used, for example, alcohols such as ethanol and isopropyl alcohol, hydrogen peroxide, and the like may be used. When a gas sterilization component is used, for example, fine ozone bubbles may be dissolved in water to produce ozone water. When a solid sterilizing component is used, sodium hypochlorite or the like may be used, for example.

The various electrolyzed water and sterilized water described above correspond to "functional water" in the present invention. In the present specification, the term "sterilization" is used as a broad concept including not only the meaning of reducing bacteria (in this case, the meaning of reducing bacteria by removing bacteria but also the meaning of reducing bacteria by killing bacteria), but also the meaning of inhibiting the growth of bacteria without reducing bacteria. The "functional water" in the present invention refers to water in which the sterilization function as described above is added to normal water by a predetermined treatment.

In the present embodiment, the electrolytic water is used as the functional water in the present invention, but it is needless to say that the above-mentioned sterilized water other than the electrolytic water may be used instead of the electrolytic water.

Next, the operation of the wash stand 1 according to the embodiment of the present invention will be described with reference to fig. 5 to 10.

Fig. 5 is a control flowchart of the functional water solenoid valve 30 by the controller 40. Fig. 6 is a timing chart showing an example of control by the controller 40, and shows, in order from the top: whether the human body detection sensor 19 detects or not; detection or absence of the proximity sensor 18; opening and closing of the water solenoid valve 28a and the hot water solenoid valve 28 b; and opening and closing of the functional water electromagnetic valve 30. Fig. 7 and 8 are timing charts showing other examples of the control of the controller 40.

The control flowchart shown in fig. 5 is a flowchart that is started when the state changes from the non-detection state where the human body detection sensor 19 does not detect the approach of a human body to the wash stand 1 to the detection state where the approach of a human body is detected.

First, at time t1 in fig. 6, when the user approaches the washbasin 1, the human body detecting sensor 19 detects this. When the human body detection sensor 19 detects the approach of the user, step S1 of the flowchart of fig. 5 is executed. Next, at time t2 in fig. 6, when the user approaching the washbasin 1 extends his/her finger toward the 1 st water discharge part 4a, the proximity sensor 18 detects this. When the proximity sensor 18 detects a detection target, the controller 40 sends control signals to the water solenoid valve 28a and the hot water solenoid valve 28b to open them. When the electromagnetic valve for water 28a is opened, the tap water supplied from the water supply pipe 20a passes through the water stop plug 22a and the filter 24a to reach the electromagnetic valve for water 28a, and flows into the flow rate/temperature adjustment valve 10. On the other hand, when the hot water solenoid valve 28b is opened, the hot water supplied from the hot water supply pipe 20b passes through the water stop plug 22b and the filter 24b to reach the hot water solenoid valve 28b, and flows into the flow rate/temperature adjustment valve 10.

The tap water and the hot water flowing into the flow rate and temperature control valve 10 are mixed and discharged from the water discharge port of the 1 st water discharge unit 4a toward the bowl portion 2. Here, the flow rate and the mixing ratio of hot water and water in the temperature adjustment valve 10 are set by the rotational position of the operation lever 10a in the left-right direction. The flow rate of the hot and cold water flowing out of the flow rate and temperature adjustment valve 10 is set by the rotational position of the operating lever 10a in the front-rear direction. The hot and cold water flowing out of the flow rate/temperature control valve 10 is discharged from the 1 st water discharge portion 4 a. At time t3 in fig. 6, when the user's finger is away from water discharge unit 14 a, the proximity sensor 18 does not detect the object to be detected, and therefore the controller 40 sends control signals to the water solenoid valve 28a and the hot water solenoid valve 28b to close these valves.

At time t1 in fig. 6, the controller 40 counts the time after the human body detection sensor 19 detects the approach of the user. Next, at time t4 in fig. 6, when the user is away from the washstand and the human body detection sensor 19 is in a non-detection state where the user is not detected to approach, the process in the flowchart shown in fig. 5 proceeds from step S2 to step S3.

Next, in step S3 of fig. 5, it is determined whether or not the electrolyzed water is in the middle of discharge (spraying). That is, when the user manually sprays the electrolytic water while using the wash stand and leaves the wash stand on the way of the spray, the electrolytic water may be sprayed even after the human body detection sensor 19 is in a non-detection state. When the electrolyzed water is in the middle of discharge, the process proceeds to step S4, and when the electrolyzed water is not in the middle of discharge, the process proceeds to step S5. In step S4, the timing of the time (the time between times t1 and t4 in fig. 6) at which the human body detection sensor 19 detects the approach of the user is reset, and the process of 1 time in the flowchart shown in fig. 5 is ended. In the present embodiment, the controller 40 determines whether or not the electrolyzed water is discharged based on whether or not the control signal for opening the electromagnetic valve 30 for functional water is output by itself. The discharge of the electrolyzed water by hand will be described later.

Next, in step S5 of fig. 5, it is determined whether or not the time (the time between times t1 and t4 of fig. 6) during which the human body detecting sensor 19 counted by the controller 40 continuously detects the approach of the user is the continuous approach time τ 1 or more. When the counted time is shorter than the continuous approach time τ 1, the process proceeds to step S6, and the counted probe time is reset in step S6, and the process of fig. 5 for 1 time is terminated. In the present embodiment, the predetermined continuous approach time τ 1 is 10 seconds. On the other hand, if the counted time is equal to or longer than the continuous approach time τ 1, the flow proceeds to step S7, and in step S7, it is determined whether or not water discharge has been performed during the probe time (time t1 to time t4 in fig. 6). If the proximity sensor 18 does not detect the approach of the object during the detection time, that is, if the water discharge is not performed, the process proceeds to step S8, and the counted detection time is reset at step S8, and the process of the flowchart 1 shown in fig. 5 is ended. When the water discharge is performed during the detection time, the process of step S9 or less is executed to spray the electrolytic water.

That is, even when the human body detection sensor 19 detects the approach of the user, if the approach time of the user to the wash stand 1 is short, since the possibility that the user simply passes the front side of the wash stand 1 is high, the electrolytic water is not sprayed, and the 1 st pass of the flowchart shown in fig. 5 is ended (step S6). Even if the approach of the user is detected for the continuous approach time τ 1 or more defined by the human body detection sensor 19, if water is not spouted during this period, the possibility that the user does not soil the tub 2 with the use of a blower or the like before the wash stand 1 is high. Therefore, even in this case, the electrolytic water is not sprayed, and the process of the flowchart shown in fig. 5 is ended 1 time (step S8).

In the example shown in fig. 6, since the time (time t1 to time t4 in fig. 6) at which the approach of the user is detected is the continuous approach time τ 1 or more and the water is spouted from the 1 st water spouting portion 4a during this time (time t2 to time t3 in fig. 6), step S9 or less of the flowchart shown in fig. 5 is executed. That is, the water discharge from the 2 nd water discharge unit 4b is performed after the state where the human body sensor 19 detects the approach of the user changes to the state where the approach of the user is not detected. In step S9, it is determined whether or not the human body detection sensor 19 has detected the approach of the user. When the human body detection sensor 19 does not detect, the flow proceeds to step S10. On the other hand, after the time t4 of fig. 6, when the human body detecting sensor 19 detects the approach of the user again, the processing of step S9 → S11 → S9 is repeatedly executed during the detection. The "standby time reset" in step S11 will be described later.

After time t4 of fig. 6, when the human body detection sensor 19 does not detect the approach of the user, the process in the flowchart of fig. 5 transitions from step S9 to step S10. In step S10, it is determined whether or not a predetermined standby time T1, which is integrated from the time when the human body detection sensor 19 no longer detects the user (time T4 in fig. 6), has elapsed. The process proceeds to step S12 when the standby time T1 elapses, and returns to step S9 when it does not elapse. Thus, after the user is no longer detected at time T4, when the human body detection sensor 19 does not detect a user, the process of step S10 → S9 → S10 is repeatedly performed until the standby time T1 elapses. In the present embodiment, the standby time T1 is 60 seconds.

When the standby time T1 elapses at time T5 of fig. 6, the process in the flowchart of fig. 5 transitions from step S10 to step S12. In the processing following step S12, the electrolytic water is sprayed from the 2 nd water discharge unit 4 b. Thus, although the latest jetting is completed at time T3, the spraying of the electrolytic water from the 2 nd jetting unit 4b is prohibited while the human body sensor 19 detects the user, and after the user is no longer detected at time T4, the spraying of the electrolytic water is executed after the standby time T1 has elapsed.

When the water discharge at the time t3 is stopped at substantially the same time as the non-detection of the user by the human body detection sensor 19 (time t4), if the electrolytic water is sprayed immediately after the non-detection of the user, there is a possibility that the electrolytic water is sprayed while the discharged tap water remains in the bowl portion 2. Therefore, after the non-detection of the user, the spraying of the electrolyzed water is performed after the standby time T1 elapses. That is, if the electrolytic water is sprayed in a state where the discharged tap water remains in the bowl portion 2, the electrolytic water is diluted, and therefore the sterilization effect of the electrolytic water is reduced.

In step S12, the controller 40 sends a signal to the functional water solenoid valve 30 to open it. Next, in step S13, the controller 40 applies a voltage to the electrodes (not shown) of the electrolytic bath 38. When the functional water solenoid valve 30 is opened, the tap water supplied from the water supply pipe 20a passes through the water stop plug 22a and the filter 24a and reaches the functional water solenoid valve 30. The tap water passing through the functional water solenoid valve 30 flows into the electrolytic bath 38 through the pressure regulating valve 32 and the check valve 36. The tap water flowing into the electrolytic cell 38 is electrolyzed by the voltage (current) applied by the controller 40, thereby generating electrolyzed water. The generated electrolyzed water is atomized and sprayed from the 2 nd water discharge part 4b to the bowl part 2. The sprayed electrolyzed water sterilizes the surface of the bowl portion 2 and the drain port 2a, and suppresses the propagation of bacteria.

Next, in step S14 of fig. 5, it is determined whether or not a predetermined functional water discharge time T2 has elapsed after the functional water electromagnetic valve 30 is opened (after time T5 of fig. 6). When the functional water discharge time T2 has elapsed, the process proceeds to step S16, and when not, the process proceeds to step S15. In step S15, it is determined whether the human body detection sensor 19 has detected a user (is in a non-detection state for the user), and the processing returns to step S14 when in the non-detection state for the user, and the processing proceeds to step S19 when in the detection state for the user. Accordingly, after the functional water electromagnetic valve 30 is opened at time T5, when the human body detection sensor 19 does not detect a user, the process of step S14 → S15 → S14 is repeatedly executed until the functional water discharge time T2 elapses. In the present embodiment, the functional water discharge time T2 is 10 seconds.

When the functional water discharge time T2 elapses at time T6 of fig. 6, the process in the flowchart of fig. 5 transitions from step S14 to step S16. In step S16, the controller 40 sends a signal to the functional water solenoid valve 30 to close it. Next, in step S17, the controller 40 stops the energization to the electrolytic cell 38. Then, in step S18, the controller 40 resets the time (time t1 to time t4 in fig. 6) at which the human body detection sensor 19 integrated by the controller 40 detects the user to zero, and ends the processing of the flowchart 1 shown in fig. 5. After the process of the flowchart shown in fig. 5 is ended, when the human body detection sensor 19 detects the approach of the user, the process of the flowchart of fig. 5 is started again from step S1.

In the example shown in fig. 6, at time t7, the human body detection sensor 19 again detects the approach of the user and starts the processing of the flowchart in fig. 5. Also, at time t8, since the human body detecting sensor 19 is in the non-detecting state, the process in the flowchart of fig. 5 proceeds from step S2 to S3. Here, since the period (time t7 to time t8 in fig. 6) during which the human body is detected by the human body detection sensor 19 is the continuous approach time τ 1 or longer, the process in the flowchart in fig. 5 proceeds from step S5 to S7. However, in the detection period of the human body by the human body detection sensor 19 (time t7 to time t8 in fig. 6), since water is not discharged from the 1 st water discharge unit 4a, the process proceeds from step S7 to S8, and the electrolytic water is not discharged, and the process of the flowchart 1 shown in fig. 5 is ended. Thus, even when the user detects that the user is located near the washbasin 1 for the continuous approach time τ 1 or longer, the electrolytic water is not discharged because the possibility of dirt adhering to the bowl portion 2 is extremely low when the water discharge is not performed.

Next, another example of the control of the controller 40 will be described with reference to fig. 5 and 7.

First, at time t10 in fig. 7, when the human body sensor 19 detects the user, the processing of the flowchart shown in fig. 5 is started, and water discharge from the 1 st water discharge unit 4a is performed between time t11 and time t 12. Next, at time t13 of fig. 7, when the human body detecting sensor 19 is in the non-detecting state, the process in the flowchart shown in fig. 5 transitions from step S2 to S3. Further, since the period (time t10 to time t13) during which the human body detecting sensor 19 detects the user is longer than the predetermined continuous approach time τ 1, the process in fig. 5 proceeds to step S7. Since water discharge is performed during the period when the user is detected (time t11 to time t12), the process in fig. 5 proceeds from step S7 to S9, and the standby time is integrated from time t 13. The standby time accumulated from the time t13 is accumulated while the processing of step S9 → S10 → S9 is repeated.

Next, at time T14 in fig. 7, when the human body detection sensor 19 detects the approach of the user before the predetermined standby time T1 elapses (before the integrated standby time reaches T1), the process of repeating step S9 → S10 → S9 is repeated as step S9 → S11 → S9 in the flowchart shown in fig. 5. Here, in step S11, since the integrated standby time is reset, the standby time is not integrated (the integrated value of the standby time does not increase) while the step S9 → S11 → S9 is repeated (the detection state period for the user).

Next, at time t15 in fig. 7, when the human body detecting sensor 19 no longer detects the user, in the flowchart shown in fig. 5, the process of repeating step S9 → S11 → S9 is to repeat step S9 → S10 → S9, and the standby time is integrated from time t 15. Further, when the human body detection sensor 19 does not detect the user in the middle of the integration of the standby time and the predetermined standby time T1 elapses at the time T16 of fig. 7, the process in the flowchart shown in fig. 5 transitions from step S10 to S12. In the processing following step S12, electrolytic water is sprayed from the 2 nd water discharge unit 4b over a predetermined functional water discharge time T2 (time T16 to time T17 in fig. 7), and the processing of the flow chart shown in fig. 5 is ended 1 time.

Thus, after the human body detecting sensor 19 is in the non-detecting state (after time T13 in fig. 7), if the user is detected again (time T14) during the lapse of the predetermined standby time T1 (time T13), the integrated value of the standby time is reset, and after the non-detecting state (after time T15), the integration of the standby time is restarted from zero (time T15). Here, although the detection state during standby (time T14 to T15) is a state of a short time shorter than the predetermined continuous approach time τ 1, the detection state at time T10 to T13 exceeds the continuous approach time τ 1, and therefore, the electrolytic water is sprayed (time T16 to T17) after the predetermined standby time T1 has elapsed (after time T16) regardless of the period of the detection state between the detection states (time T14 to T15).

Next, another example of the control of the controller 40 will be described with reference to fig. 5 and 8.

First, at time t18 in fig. 8, when the human body sensor 19 detects the user, the processing of the flowchart shown in fig. 5 is started, and water discharge from the 1 st water discharge unit 4a is performed between time t19 and time t 20. Next, at time t21 of fig. 8, when the human body detecting sensor 19 is in the non-detecting state, the process in the flowchart shown in fig. 5 transitions from step S2 to S3. Further, since the period (time t18 to time t21) during which the human body detecting sensor 19 detects the user is longer than the predetermined continuous approach time τ 1, the process in fig. 5 proceeds to step S7. Since water discharge is performed during the period when the user is detected (time t19 to time t20), the process in fig. 5 proceeds from step S7 to S9, and the standby time is integrated from time t 21. The standby time accumulated from the time t21 is accumulated while the processing of step S9 → S10 → S9 is repeated.

When the standby time T1 elapses at time T22, the process in the flowchart of fig. 5 transitions from step S10 to S12, and the electrolytic water is sprayed from the 2 nd water discharge unit 4 b. While this spraying of the electrolyzed water is performed, the processing of step S14 → S15 → S14 is repeatedly performed in the flowchart. Although the spray of the electrolyzed water continues for the predetermined functional water discharge time T2 from the start of spraying, in the example shown in fig. 8, the human body detection sensor 19 detects the user before the functional water discharge time T2 elapses from the start of spraying at time T22 (time T23 in fig. 8). When the human body detection sensor 19 detects a user, the process in the flowchart transitions from step S15 to S19.

In step S19, the controller 40 sends a signal to the functional water solenoid valve 30 to close the valve, and stops the energization of the electrolytic bath 38. This stops the spraying of the electrolyzed water from the 2 nd water discharge portion 4 b. In this way, if the human body sensor 19 detects the user before the functional water discharge time T2 elapses while the electrolytic water is sprayed, the controller 40 stops spraying the electrolytic water from the 2 nd water discharge unit 4 b. That is, in a state where the human body sensor 19 detects the user, since there is a possibility that water is spouted from the 1 st water spouting portion 4a, the sprayed electrolyzed water is flushed even at this time, and the electrolyzed water is wasted.

After step S19, in the flowchart of fig. 5, the process of step S9 → S11 → S9 is repeatedly performed until the human body detecting sensor 19 is in the non-detecting state. Next, when the human body detecting sensor 19 is in the non-detecting state at time T24 in fig. 8, the process in the flowchart transitions to step S10, and the process of step S10 → S9 → S10 is repeated until a predetermined standby time T1 elapses.

Next, when the standby time T1 elapses at time T25 in fig. 8, the process in the flowchart proceeds to step S12, and spraying of electrolytic water from the 2 nd water discharge unit 4b is started. When the functional water discharge time T2 has elapsed at time T26, the spraying of the electrolytic water is stopped and the detection time of the human body detection sensor 19 is reset, and the processing of fig. 5, which is 1 time in the flowchart, is ended.

Next, the discharge of the electrolyzed water by hand will be described with reference to fig. 5, 9, and 10.

Fig. 9 is a flowchart showing a manual discharge process of electrolytic water. Fig. 10 is a time chart showing an example of the case where the electrolytic water is manually discharged. As described above, in the wash stand 1 according to the embodiment of the present invention, the operational switch 12 provided in the faucet device unit 4 is operated, whereby the electrolyzed water as the functional water can be manually discharged from the 2 nd water discharge portion 4 b. The flowchart shown in fig. 9 shows the processing executed when the electrolytic water is discharged by operating the switch 12.

First, when the operation switch 12 is operated in step S21 of fig. 9, the controller 40 sends a signal to the functional water solenoid valve 30 to open it in step S22. Next, in step S13, the controller 40 applies a voltage to the electrodes (not shown) of the electrolytic bath 38. When the functional water solenoid valve 30 is opened, the tap water supplied from the water supply pipe 20a flows into the electrolytic bath 38 through the functional water solenoid valve 30. The tap water flowing into the electrolytic bath 38 is electrolyzed, and the generated electrolyzed water is atomized and sprayed from the 2 nd water discharge part 4b to the bowl part 2.

Next, in step S24, it is determined whether or not a predetermined functional water discharge time T2 has elapsed after the functional water electromagnetic valve 30 is opened. When the functional water discharge time T2 has elapsed, the process proceeds to step S26, and when not, the process proceeds to step S25. Then, in step S25, it is determined whether or not the operation switch 12 has been operated again. When the operation switch 12 is operated again, the process proceeds to step S26, and when not operated, the process returns to step S24. Thus, when the operation switch 12 is not operated again after the functional water solenoid valve 30 is opened, the process of step S24 → S25 → S24 is repeated.

When the operation switch 12 is operated again after the functional water discharge time T2 elapses or before the functional water discharge time T2 elapses after the electromagnetic valve 30 for functional water is opened, the process transitions to step S26. In step S26, the controller 40 closes the electromagnetic valve 30 for functional water and stops the energization of the electrolytic bath 38, thereby ending the processing of step 1 in the flowchart shown in fig. 9. In the present embodiment, the functional water discharge time T2, which is the time during which the electrolytic water continues to be discharged when the operation switch 12 is operated, is 10 seconds, which is the same as the discharge time during which the controller 40 automatically discharges the electrolytic water.

In the example of the time chart shown in fig. 10, the human body detecting sensor 19 detects the approach of the user at time t 31. Next, when the proximity sensor 18 detects the finger of the user at time t32, the water solenoid valve 28a and the hot water solenoid valve 28b are opened, and water discharge from the 1 st water discharge unit 4a is started. After stopping the water discharge from the 1 st water discharge unit 4a at time t33, the user operates the operation switch 12 at time t34 to discharge the electrolyzed water from the 2 nd water discharge unit 4 b. For example, the user can spray electrolytic water to the toothbrush to sterilize it.

Since the operation switch 12 is not operated any more after the operation switch 12 is operated at time T34, the functional water electromagnetic valve 30 is closed at time T35 after a predetermined functional water discharge time T2(10 seconds) has elapsed, and the spray of electrolytic water is stopped (step S24 → S26 in fig. 9). Next, although the user operates the operation switch 12 again at time T36 to start spraying the electrolyzed water, the electrolyzed water stops spraying because the operation switch 12 is operated at time T37 until the functional water discharge time T2 elapses this time (step S25 → S26 in fig. 9).

Further, although the user operates the operation switch 12 at the time T38 to start spraying the electrolyzed water, the human body detection sensor 19 is in the non-detection state at the time T39 because the user leaves the wash stand 1 at the time T39 before the functional water discharge time T2 elapses. Even in such a case, the controller 40 continues to spray the electrolytic water, and stops spraying the electrolytic water at a time T40 when the functional water discharge time T2 elapses (step S24 → S26 in fig. 9).

On the other hand, since the human body detecting sensor 19 transits from the detecting state to the non-detecting state, the above-described step S3 of the flowchart shown in fig. 5 is executed. However, since it is determined in step S3 of fig. 5 that the electrolyzed water (functional water) is being discharged, the detection time is reset in step S4, and the processing of the flowchart shown in fig. 5 is terminated without discharging the electrolyzed water again. That is, at the time when the human body sensor 19 is in the non-detection state (time t39 in fig. 10), the controller 40 does not perform automatic discharge of the electrolytic water when the electrolytic water is manually discharged.

In this way, when the user leaves the washbasin 1 while continuing to discharge the electrolyzed water after starting the discharge of the electrolyzed water manually, the electrolyzed water is very likely to be discharged for the purpose of sterilizing the bowl portion 2 and the drain port 2a, rather than sterilizing the toothbrush and the like. Therefore, even when the detection time of the human body detection sensor 19 (time t31 to time t39 in fig. 10) exceeds the predetermined continuous approach time τ 1 (10 seconds), the controller 40 does not perform automatic discharge of the electrolyzed water after the time t39, and thus the sterilization of the bowl portion 2 and the drain opening 2a is not repeated.

In the present embodiment, the controller 40 determines whether or not the electrolyzed water is discharged based on whether or not the control signal for opening the electromagnetic valve 30 for functional water is output by itself, but a sensor for detecting the discharge of the electrolyzed water may be separately provided, and the determination of whether or not the electrolyzed water is discharged may be made based on the detection signal of the sensor.

According to the wash stand 1 of the embodiment of the present invention, since the discharge of the electrolyzed water from the 2 nd water discharge portion 4b is prohibited when the approach of the user to the wash stand 1 is detected, the discharge of the electrolyzed water can be prevented in a situation where the possibility that the user restarts the discharge of the electrolyzed water from the 1 st water discharge portion 4a is high, and the waste of the electrolyzed water can be avoided. That is, if the water is spouted from the 1 st water spouting portion again immediately after the spouting of the electrolyzed water, the possibility that the undesired bacteria will adhere to the bowl portion again is high, and the electrolyzed water needs to be spouted again after the end of the spouting, and the electrolyzed water that was first spouted becomes wasteful. According to the wash stand of the present embodiment, it is possible to avoid such a waste of electrolyzed water, and to effectively suppress the propagation of bacteria at the bowl portion 2 and the drain port 2a while saving water. Further, by suppressing the waste of the electrolyzed water, the consumption of the electrodes for generating the electrolyzed water and the like and the waste of electric power can be suppressed.

Further, according to wash stand 1 of the present embodiment, since electrolytic water is discharged from 2 nd water discharge unit 4b (time t5 to t6 in fig. 6) after the state in which proximity of the user is detected by human body detection sensor 19 (time t1 to time t4 in fig. 6) is changed to the state in which proximity of the user is not detected (time t4 to time t6 in fig. 6), electrolytic water can be discharged reliably in a situation in which the possibility that the user immediately starts using wash stand 1 again is low, electrolytic water is not wasted, and the growth of bacteria can be effectively suppressed.

Further, according to the wash stand 1 of the present embodiment, when the time during which the human body sensor 19 continuously detects the approach of the user is shorter than the predetermined continuous approach time τ 1, the water discharge from the 2 nd water discharge portion 4b is not performed (step S5 → S6 in fig. 5), and therefore, for example, when the user passes in front of the wash stand 1, it is possible to avoid the occurrence of unnecessary electrolytic water discharge in a situation where bacteria do not adhere to the bowl portion 2.

Further, according to the wash stand 1 of the present embodiment, when water is not discharged from the 1 st water discharge portion 4a (time t7 to t8 in fig. 6) while the human body detection sensor 19 detects the approach of the user, the electrolytic water is not discharged, and therefore, for example, when the user uses a forced draft fan in front of the wash stand 1, the electrolytic water can be prevented from being discharged in a state where bacteria do not adhere to the bowl portion 2.

Further, according to the wash stand 1 of the present embodiment, since the discharge of water from the 2 nd water discharge unit 4b is started after the human body detection sensor 19 is in the non-detection state (time T13 of fig. 7) and after the predetermined standby time T1 has elapsed (time T16 of fig. 6), the discharge of electrolyzed water can be prevented in a situation where there is a high possibility that the wash stand 1 is reused in a short time, such as when the user leaves the wash stand 1 during the use of the wash stand 1 (time T13 to T14 of fig. 6).

Further, according to the wash stand 1 of the present embodiment, when the state in which the human body detection sensor 19 detects the approach of the user is changed (time T14 in fig. 7) while the predetermined standby time T1 elapses, the standby time is reset (step S9 → S11 in fig. 5), and then when the state in which the human body detection sensor 19 does not detect the approach of the user is changed (time T15 in fig. 7), the integration of the standby time is restarted. Therefore, even when the user temporarily leaves the wash stand 1 a plurality of times, the functional water can be prevented from being wasted by spouting, and the propagation of the bacteria in the bowl portion 2 and the drain port 2a can be effectively suppressed while saving water.

Further, according to the wash stand 1 of the present embodiment, since the functional water electromagnetic valve 30 is closed when the human body detection sensor 19 detects the approach of the user (time t23 in fig. 8) during the automatic discharge of the functional water from the 2 nd water discharge unit 4b, the functional water can be prevented from being discharged in a state where the user starts using the wash stand 1. As a result, the user can use the wash stand 1 naturally.

Further, according to the wash stand 1 of the present embodiment, when the human body sensor 19 changes to the state in which the user's approach is detected (time t23 in fig. 8) during the discharge of the functional water and changes again to the state in which the human body sensor 19 does not detect the user's approach (time t24 in fig. 8) after the discharge of the functional water is interrupted, the functional water is automatically discharged from the beginning (time t25 in fig. 8). Therefore, even if the wash stand 1 is used after the interruption of the discharge of the functional water, since the discharge of the functional water is started from the beginning, the functional water can be reliably discharged by a predetermined amount after the use of the wash stand 1 (time t25 to time t26 in fig. 8), and the propagation of the bacteria in the bowl portion 2 and the water discharge opening 2a can be suppressed.

Further, according to the wash stand 1 of the present embodiment, in the case where the human body sensor 19 has not detected the approach of the user (time t39 in fig. 10) during the discharge of the functional water by the manual operation of the user (time t38 to time t40 in fig. 10), the automatic discharge of the functional water is not executed (step S3 → S4 in fig. 5), and therefore, the automatic discharge of the functional water and the sterilization by the manual operation of the user can be prevented from being overlapped, and the discharge of the functional water can be prevented from being wasted.

Although the preferred embodiments of the present invention have been described above, various modifications may be added to the above embodiments. In particular, although the water discharge from the 2 nd water discharge unit 4b is started after the predetermined waiting time T1 has elapsed after the human body sensor 19 is in the non-detection state in the above-described embodiment, the present invention may be configured such that the water discharge from the 2 nd water discharge unit 4b is started without a waiting time after the human body sensor 19 is in the non-detection state. In this case, the present invention may be configured such that steps S9 to S11 in the flowchart of fig. 5 are omitted, and step S12 is executed or less after the determination of yes in step S7.

In the above-described embodiment, the wash stand provided with the automatic faucet that spouts water when the proximity sensor 18 detects a detected object is applied to the present invention, but as a modification, a wash stand provided with a manual faucet device may be applied to the present invention.

Fig. 11 is a view showing an operation portion of the faucet device in the washstand in the present modification.

In this modification, the user can switch between water discharge and water stop by manually operating the operation unit shown in fig. 11 to open and close an opening/closing valve (not shown). As shown in fig. 11, the operation unit 50 in the present modification includes: a base portion 52; and an operating lever 54 rotatably attached to the base portion 52. The faucet device is configured to be in a water stop state when the operating lever 54 is in the closed position shown by the solid line, and to start spouting when the operating lever 54 is rotated to the open position shown by the phantom line.

Further, a magnet 54a is attached to the operating lever 54. On the other hand, a hall element 52a as a magnetic sensor is attached to the base portion 52 at a position facing the magnet 54 a. Thus, in a state where the operating lever 54 is at the closed position, the hall element 52a detects the magnetic field of the magnet 54 a. In contrast, when the operating lever 54 is rotated to the open position, the magnet 54a no longer faces the hall element 52a, and the hall element 52a does not detect the magnetic field of the magnet 54 a. Therefore, the hall element 52a functions as a water discharge sensor, and the controller 40 detects whether water discharge has been performed based on the presence or absence of the magnetic field detected by the hall element 52 a. In step S7 of fig. 5, the controller 40 determines whether or not water discharge has been performed while the human body sensor 19 is in the detection state, based on the information. According to this modification, the present invention can also be applied to a washstand having a manual water faucet device.

Claims

1. A wash stand capable of discharging tap water and functional water having a sterilizing effect, characterized by comprising:

a basin part having a water outlet;

a 1 st water discharge unit for discharging tap water to the bowl unit;

a 2 nd water discharge part for discharging functional water having a sterilizing effect to the bowl part;

an electromagnetic valve for switching between water discharge and water stop from the 2 nd water discharge unit;

a human body detection sensor for detecting the approach of a user to the wash stand when the user approaches a range of a predetermined distance from the wash stand;

and a control part for opening the electromagnetic valve according to the detection signal of the human body detection sensor and automatically discharging the functional water from the 2 nd water discharge part,

the control unit prohibits automatic water discharge from the 2 nd water discharge unit when the human body detection sensor detects the approach of a user,

the control unit opens the electromagnetic valve to perform automatic water discharge from the 2 nd water discharge unit after the state where the human body detection sensor detects the approach of the user changes to the state where the approach of the user is not detected,

the washbasin further comprises a water discharge sensor for detecting the approach of the object to be detected to the 1 st water discharge part to detect the water discharge from the 1 st water discharge part, wherein the control part does not execute the automatic water discharge from the 2 nd water discharge part even after the state of detecting the approach of the user by the human body detection sensor is changed to the state of not detecting the approach of the user when the water discharge from the 1 st water discharge part is not detected while the human body detection sensor detects the approach of the user,

the detection range of the human body detection sensor detects the front of the washbasin from the detection range of the water discharge sensor.

2. A wash stand according to claim 1, wherein said control unit is configured to measure a time during which said human body detection sensor continuously detects the approach of the user, and to not perform automatic water discharge from said 2 nd water discharge unit when the time is less than a predetermined continuous approach time.

3. The wash stand according to claim 1, wherein the control unit starts the water discharge of the 2 nd water discharge unit after a lapse of a predetermined standby time after a change from a state in which the human body detection sensor detects the approach of the user to a state in which the approach of the user is not detected.

4. A wash stand according to claim 3, wherein the control portion resets the integration of the standby time when a change from a state in which the human body detection sensor does not detect the approach of the user to a state in which the approach of the user is detected during the elapse of the predetermined standby time, and thereafter newly starts the integration of the standby time when a change from a state in which the human body detection sensor detects the approach of the user to a state in which the approach of the user is not detected.

5. A wash stand according to claim 1 wherein said control section closes said solenoid valve when changing from a state in which said human body detecting sensor does not detect the approach of a user to a state in which the approach of a user is detected during the time when said solenoid valve is opened to automatically discharge the functional water from said 2 nd water discharge portion.

6. A wash stand according to claim 5 wherein the control section automatically discharges the functional water from a new start when the functional water discharge from the 2 nd water discharge section changes to a state in which the human body detection sensor detects the approach of the user and changes again to a state in which the human body detection sensor does not detect the approach of the user after the functional water discharge is interrupted.

7. The wash stand according to any one of claims 1 to 6, further comprising a manual discharge switch for discharging the functional water from the 2 nd water discharge portion for a predetermined time in response to a user's operation, wherein the control portion does not execute the automatic discharge from the 2 nd water discharge portion when a state in which the user's approach is detected by the human body detection sensor changes to a state in which the user's approach is not detected while the functional water is discharged by the operation of the manual discharge switch.