JP6714817B2 - Sanitary washing equipment - Google Patents

Description

Aspects of the present invention generally relate to sanitary washing devices.

The sanitary washing device installed in the toilet sprays washing water from the nozzle onto the user's local area to wash the local area. At this time, if the temperature of the sprayed cleaning water is too low, the user may feel uncomfortable. Therefore, it is desired that hot water of an appropriate temperature be jetted to the sanitary washing device during local washing.

As a method of supplying hot water, in a facility where a large number of toilets are installed, for example, a hot water supply method called a central hot water supply method is adopted. In the central hot water supply system, water is heated by a heating device installed at one location to generate hot water. The generated hot water is guided to each toilet room by piping or the like. In addition to hot water, water at room temperature is introduced to each toilet room through a pipe such as a water pipe. At this time, a mixing valve (hot water mixing valve) is used for the sanitary washing device. The mixing valve mixes hot water and normal temperature water to generate hot water (mixed water).

Such a sanitary washing device is provided with, for example, a nozzle-side water channel that guides hot water to the nozzle and a drainage channel that drains hot water. Then, the sanitary washing device first drains the cooled water remaining in the hot water pipe and in the flow path of the mixed water through the drainage channel before the user performs local cleaning. Then, hot water is jetted from the nozzle through the nozzle side water passage. This makes it possible to inject hot water at an appropriate temperature during local cleaning.

Also in the general cleaning nozzle, the cleaning water remaining in the flow path up to the cleaning nozzle may be cold. Therefore, a system may be used in which drainage is performed until a suitable temperature is reached after a certain time has passed from the start of cleaning.

As described above, in the case where two flow paths, that is, a flow path for guiding hot water to the nozzle and a flow path for draining hot water, are provided, each of the two flow paths is provided with an electromagnetic valve, thereby Switching means is generally used (Patent Document 1).

Japanese Patent No. 03580434

When the electromagnetic valve is provided in each of the two flow paths as in Patent Document 1, there is a problem that the manufacturing cost of the sanitary washing device increases or the sanitary washing device enlarges depending on the number of solenoid valves. is there.

The present invention has been made based on the recognition of such problems, and an object thereof is to provide a compact and low-cost sanitary washing device when hot water and water are supplied separately.

A first invention includes a mixing valve that mixes hot water and water to generate mixed water, a nozzle that injects the mixed water toward a human body part for cleaning, and a flow path of the mixed water. , A switching unit provided on the downstream side of the mixing valve and having one electromagnetic valve, a nozzle side water channel branched from the switching unit to guide the mixed water to the nozzle, and a switching unit branched from the switching unit to supply the mixed water. A flow path including a first drainage channel for discharging to the outside, and the switching unit includes a first valve whose water passage to the first drainage channel is controlled by the solenoid valve, and the solenoid valve. It has a 2nd valve by which water flow to the nozzle side waterway is controlled, and a back room provided in the back of the 2nd valve, and when the electromagnetic valve is not energized, the above-mentioned switching part is said. When mixed water flows in, when the mixed water reaches the first valve, the first valve receives the water pressure of the mixed water and opens, whereby the mixed water flows into the first drainage channel, and When mixed water flows into the back chamber, the second valve is closed by receiving water pressure accumulated in the back chamber, so that the mixed water does not flow into the nozzle side water passage. It is a device.

According to this sanitary washing device, one solenoid valve can switch between a state where hot water flows to the nozzle side water passage and a state where hot water flows to the first drainage passage. Therefore, it is not necessary to provide two solenoid valves in the switching section. Therefore, it is possible to provide a compact and low-cost sanitary washing device.

According to this sanitary washing device, even if the solenoid valve fails and does not open, the hot water flows toward the first drainage channel side. Thereby, it is possible to prevent the hot water from being unintentionally jetted from the nozzle toward the user.

2nd invention is a 1st invention, Comprising: A control part is further provided, When the said mixed water flows into the said switching part, when the said solenoid valve is energized, the said 2nd valve is the said 1st valve. It is easier to open than the above, and the control unit controls the electromagnetic valve so that the flow of the mixed water from the mixing valve to the switching unit is started in a state where the electromagnetic valve is energized. This is a sanitary washing device.

According to this sanitary washing device, the solenoid valve is energized before the inflow of the mixed water into the switching unit is started. Therefore, when the mixed water flows into the switching portion, the second valve is in a state of being easily opened. Thereby, hot water can be smoothly supplied to the nozzle. Unnecessary displacement occurring in the first valve and the second valve can be suppressed, and the operation of the switching unit can be stabilized.

3rd invention is provided with a control part in 1st invention, Comprising: The said control part energizes from the state which energized the said solenoid valve in the state in which the said water and the said hot water do not flow into the said mixing valve. It is a sanitary washing device characterized by being switched to a non-operating state.

This sanitary washing device switches the electromagnetic valve to a non-energized state after stopping the inflow of water and hot water into the mixing valve, that is, the inflow of mixed water into the switching unit. This can prevent the first valve from opening unnecessarily.

According to the aspects of the present invention, it is possible to provide a compact and low-cost sanitary washing device when hot water and water are supplied separately.

FIG. 1 is a perspective view showing a toilet device including a sanitary washing device according to an embodiment of the present invention. It is a top view which illustrates the inside of the sanitary washing device concerning an embodiment. It is a block diagram which illustrates the water channel in the sanitary washing device concerning an embodiment. Drawing 4 (a)-Drawing 4 (c) are a perspective view and a sectional view which illustrate a part of sanitary washing device concerning an embodiment. FIG. 5A to FIG. 5C are a perspective view and a cross-sectional view illustrating a part of the sanitary washing device according to the embodiment. 6A to 6C are a perspective view and a cross-sectional view illustrating a part of the sanitary washing device according to the embodiment. 6 is a timing chart illustrating a specific example of the operation of the sanitary washing device according to the embodiment. 6 is a timing chart illustrating a specific example of the operation of the sanitary washing device according to the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same components are designated by the same reference numerals, and detailed description thereof will be appropriately omitted.
FIG. 1 is a perspective view showing a toilet device including a sanitary washing device according to an embodiment of the present invention.
The toilet device shown in FIG. 1 includes a Western-style sitting toilet (hereinafter, simply referred to as “toilet” for convenience of description) 800, and a sanitary washing device 100 provided thereon. The sanitary washing device 100 includes a casing 400, a toilet seat 200, and a toilet lid 300. The toilet seat 200 and the toilet lid 300 are axially supported by the casing 400 so as to be freely opened and closed.

Here, in the specification of the present application, the upper side when viewed from the user who sits on the toilet seat 200 is “upper side”, and the lower side when viewed from the user who sits on the toilet seat 200 is “downward”. Further, the front side is referred to as “front” when viewed from the user who sits on the toilet seat 200 with his back facing the opened toilet lid 300, and the rear side is referred to as “rear side” when viewed from the user who sits on the toilet seat 200. Further, the right side of the user sitting on the toilet seat 200 is referred to as “right side”, and the left side of the user sitting on the toilet seat 200 is referred to as “left side”.

Inside the casing 400, a local cleaning function unit that realizes cleaning of the “butt” of a user sitting on the toilet seat 200 is built in. Further, for example, in the casing 400, an entry detection sensor 402 (human body detection unit) that detects the entry of the user into the toilet room, a human body detection sensor 403 (human body detection unit) that detects the user in front of the toilet seat 200, A seating detection sensor 404 (human body detection means) that detects the seating of the user on the toilet seat 200 is provided.

When the seating detection sensor 404 detects the user sitting on the toilet seat 200, when the user operates the operation unit 500 such as a remote controller, the nozzle 473 (cleaning nozzle) is advanced into the bowl 801 of the toilet 800. be able to. In the sanitary washing device 100 shown in FIG. 1, the nozzle 473 has advanced into the bowl 801. The nozzle 473 is moved back and forth by any means such as a driving force by a motor.

One or a plurality of water discharge ports 474 are provided at the tip of the nozzle 473. The nozzle 473 can inject water or hot water from the water outlet 474 provided at the tip of the nozzle 473 to wash the “butt” of the user sitting on the toilet seat 200.

The seating detection sensor 404 can detect a human body existing above the toilet seat 200 immediately before the user sits on the toilet seat 200, or a user seated on the toilet seat 200. That is, the seating detection sensor 404 can detect not only the user who is seated on the toilet seat 200 but also the user who is above the toilet seat 200. As such a seating detection sensor 404, for example, an infrared light emitting/receiving distance measuring sensor or the like can be used.

Further, the human body detection sensor 403 can detect a user who is in front of the toilet 800, that is, a user who is present in a position away from the toilet seat 200 to the front. That is, the human body detection sensor 403 can detect a user who has entered the toilet room and is approaching the toilet seat 200. As such a human body detection sensor 403, for example, an infrared light emitting/receiving distance measuring sensor or the like can be used.

Further, the entry detection sensor 402 can detect a user immediately after entering the room by opening the door of the toilet room, or a user who is present in front of the door trying to enter the toilet room. That is, the entry detection sensor 402 can detect not only the user who has entered the toilet room, but also the user before entering the toilet room, that is, the user who is present in front of the door outside the toilet room. As such a room entry detection sensor 402, a pyroelectric sensor, a microwave sensor such as a Doppler sensor, or the like can be used. When using a sensor that uses the Doppler effect of microwaves, or a sensor that detects the object to be detected based on the amplitude (intensity) of the microwaves that transmit the microwaves, the user can see through the door of the toilet room. It becomes possible to detect the existence. That is, the user before entering the toilet room can be detected.

In addition, the casing 400 has a "toilet seat heater" that heats the toilet seat 200, a "warm air drying function" that blows warm air toward the "buttock" of the user sitting on the toilet seat 200, and a "deodorization unit". Various mechanisms such as "" and "indoor heating unit" may be provided as appropriate. For example, the deodorizing unit 481 includes a filter impregnated with electrolyzed water and the like and a deodorizing fan 482 (see FIG. 2 ). The odor in the toilet room is sucked into the casing 400 by the operation of the deodorizing fan 482 and passes through the filter. As a result, the malodorous component is absorbed or decomposed by the electrolyzed water. At this time, an exhaust port from the deodorizing unit and an exhaust port from the indoor heating unit are appropriately provided on the side surface or the back surface of the casing 400. However, in the embodiment, the toilet seat heater, the warm air drying function, the deodorizing unit, the room temperature heating unit, and the like are not necessarily provided.

FIG. 2 is a plan view illustrating the inside of the sanitary washing device according to the embodiment.
FIG. 2 shows a local cleaning function unit incorporated in the casing 400. The sanitary washing device 100 includes a water supply pipe 91, a hot water supply pipe 92, a water supply connection part 10, a hot water supply connection part 20, a water side valve unit 15, a hot water side valve unit 25, a mixing valve 30, and a safety valve part 40. The switching unit 50 (switching valve unit), the autoclean unit 60 (functional water generation unit 61), the nozzle unit 470, the control unit 480, and the deodorizing unit 481. These are arranged on the case plate 401 of the casing 400. The case plate 401 has a plate shape or a plate shape extending in a substantially horizontal direction. The case plate 401 may appropriately have a portion inclined with respect to the horizontal direction for drainage or the like. In FIG. 2, for convenience, some elements in the casing 400 are omitted.

The control unit 480 is a control circuit (microcomputer) including an IC element and the like. The control unit 480 controls operations of electromagnetic valves and motors included in the water valve unit 15, the hot water valve unit 25, the nozzle unit 470, the deodorizing unit 481 (deodorizing fan 482), and the like. Further, the control unit 480 controls the operations of the human body detection unit, the toilet seat heater, the automatic clean unit 60, and the like.

FIG. 3 is a block diagram illustrating a water channel in the sanitary washing device according to the embodiment.
The water supply pipe 91 is connected to a water supply source (not shown) such as a water supply or a water storage tank via the water side pipe portion 14. The water-side pipe section 14 includes a strainer 11, a check valve 12 provided on the downstream side of the strainer 11, and a water shutoff valve 13 provided on the downstream side of the check valve 12. The downstream end of the water supply pipe 91 is connected to the water supply connection part 10. As a result, the water supply pipe 91 supplies water to the sanitary washing device 100. A water side valve unit 15 is provided on the downstream side of the water supply connection unit 10. The water side valve unit 15 has a water supply solenoid valve 16 and a water side pressure regulating valve 17 on the downstream side thereof. A mixing valve 30 is provided on the downstream side of the water side valve unit 15. By opening and closing the water supply solenoid valve 16, it is possible to switch between a state in which water is supplied to the mixing valve 30 and a state in which the water supply is stopped. The water side pressure regulating valve 17 has, for example, a valve (piston) provided in a cylinder and biased by a spring or the like. The valve opening changes according to the pressure of water flowing into the cylinder and the biasing force of a spring or the like. As a result, the water side pressure regulating valve 17 regulates the pressure of water supplied to the mixing valve 30.

On the other hand, the hot water supply pipe 92 is connected to a hot water supply source (not shown) such as a heating device via the hot water pipe section 24. The hot water pipe section 24 includes a strainer 21, a check valve 22 provided on the downstream side of the strainer 21, and a water stopcock 23 provided on the downstream side of the check valve 22. The downstream end of the hot water supply pipe 92 is connected to the hot water supply connection part 20. Thereby, the hot water supply connection unit 20 supplies the heated hot water to the sanitary washing device 100. A hot water valve unit 25 is provided on the downstream side of the hot water supply connection portion 20. The hot water valve unit 25 has a hot water supply solenoid valve 26 and a hot water pressure regulating valve 27 on the downstream side thereof. A mixing valve 30 is provided on the downstream side of the hot water valve unit 25. By opening/closing the hot water supply solenoid valve 26, it is possible to switch between a state in which hot water is supplied to the mixing valve 30 and a state in which the supply of hot water is stopped. The hot water pressure regulating valve 27 has, for example, a valve (piston) provided in a cylinder and biased by a spring or the like. The opening degree of the valve changes according to the pressure of the hot water flowing into the cylinder and the biasing force of the spring or the like. As a result, the hot water pressure regulating valve 27 adjusts the pressure of the hot water supplied to the mixing valve 30.

The mixing valve 30 mixes the supplied hot water and water to generate mixed water. Accordingly, hot water (mixed water) having an appropriate temperature can be supplied to the downstream side and can be jetted from the nozzle 473. In the present specification, "hot water" refers to mixed water in which water supplied from a water supply pipe and hot water supplied from a hot water supply pipe are mixed at an arbitrary ratio. The temperature of the hot water is not limited unless otherwise specified.

In this example, the mixing valve 30 is provided with temperature detecting means. Thereby, the mixing valve 30 can automatically adjust the temperature of the hot water. For example, the mixing valve 30 is a wax type temperature control valve using a wax element as a temperature detecting means. In the embodiment, the mixing valve 30 is not limited to the wax type temperature control valve, and any hot and cold water mixing valve can be used. For example, a bimetal or an arbitrary temperature sensor can be used as the temperature detecting means.

A safety valve section 40 is provided on the downstream side of the mixing valve 30. The safety valve section 40 has a thermistor 41 and a safety valve 42. The safety valve 42 has, for example, a valve (piston) provided in a cylinder and biased by a spring or the like. When the pressure of the hot water flowing into the cylinder becomes higher than a predetermined value, the valve opens and the hot water is guided to the case plate 401 side as indicated by arrow A4 shown in FIGS. 2 and 3. As a result, the warm water is discharged to the outside (for example, the bowl 801) from the opening provided in the front of the case plate 401.

The hot water flow path 110 of the sanitary washing device 100 includes a first branch portion 51 provided on the downstream side of the mixing valve 30 and the safety valve portion 40, a nozzle side water passage 55, and a first drainage passage 81. The nozzle side water passage 55 and the first drainage passage 81 are respectively provided on the downstream side of the first branch portion 51 and branched from the first branch portion 51.

The first branch portion 51 is provided with a switching portion 50 (switching valve unit). The switching unit 50 includes a solenoid valve 150. As a result, the first branching section 51 switches the flow path of the hot water supplied from the mixing valve 30. That is, by turning ON/OFF the solenoid valve 150, a state in which hot water flows to the nozzle side water passage 55 and a state in which hot water flows to the first drainage passage 81 are switched. The hot water does not have to flow in both the nozzle side water passage 55 and the first drainage passage 81 at the same time.

A negative pressure breaking device 153 is provided in the first drainage channel 81. The warm water flowing to the first drainage channel 81 is guided to the case plate 401 side as indicated by an arrow A5 shown in FIGS. 2 and 3, and is opened to the outside (for example, the bowl 801) from an opening provided in front of the case plate 401. Be thrown away.

For example, when the user uses the sanitary washing device 100, the water side valve unit 15 and the hot water side valve unit 25 are opened according to the output of the seating detection sensor 404. At this time, the hot water or hot water channel and the hot water remaining in the channel may be cold. In addition, by flowing a predetermined amount or more of water and hot water through the mixing valve 30, the mixing valve 30 can adjust the temperature of the hot water. Therefore, the temperature of the hot water supplied from the mixing valve 30 may be low for the user immediately after the user starts using it. Therefore, the sanitary washing device 100 discards a predetermined amount of warm water to the first drainage channel 81 after detecting the sitting of the human body. For example, in the mixing valve 30, the warm water is flown to the first drainage channel 81 until the warm water reaches an appropriate temperature.

After that, for example, when the user performs the local cleaning, by operating the operation unit 500, the flow path is switched by the electromagnetic valve 150. As a result, the warm water flows to the nozzle side water passage 55. The nozzle side water passage 55 includes a second branch portion 52, a water conduit 70, and a second waste water passage 82. The water conduit 70 and the second drainage channel 82 are respectively provided on the downstream side of the second branch section 52 and branched from the second branch section 52.

The second drainage channel 82 guides the warm water to the case plate 401 side and drains it to the outside (for example, the bowl 801) from the opening provided in the front of the case plate 401 as shown by an arrow A6. The water conduit 70 guides hot water to the nozzle portion 470 (nozzle 473).

The nozzle unit 470 has a flow rate switching valve 471, a flow path switching valve 472, and a nozzle 473. With the flow rate switching valve 471 and the flow path switching valve 472, it is possible to adjust the water pressure in the nozzle 473 and to switch the water discharge port 474 for discharging water.
As described above, hot water (mixed water) having an appropriate temperature can be jetted from the nozzle 473.

An automatic clean unit 60 and a negative pressure destruction device 154 are provided on the water conduit 70 on the downstream side of the second branch portion 52. The auto clean unit 60 includes a functional water generation unit 61 that generates functional water from hot water. The functional water is, for example, sterilized water having a sterilizing function. For example, the functional water generation unit 61 includes an electrolytic bath, and electrolyzes tap water (warm water) flowing inside the electrolytic bath to generate functional water containing hypochlorous acid. The auto clean unit 60 supplies functional water to the nozzle portion 470 after using the sanitary washing device 100. As a result, the outer peripheral surface (body) of the nozzle 473 can be sterilized.

In addition, "functional water" refers to a solution containing more disinfecting components such as hypochlorous acid than tap water. Further, the functional water generated in the functional water generator 61 may be a solution containing metal ions such as silver ions and copper ions, or a solution containing electrolytic chlorine, ozone and the like. The functional water may be acidic water or alkaline water. In the embodiment, the sterilizing water generator is not limited to the electrolytic cell. For example, sterilized water may be produced by dissolving a sterilizing agent or sterilizing solution in water.

Drawing 4 (a)-Drawing 4 (c) are a perspective view and a sectional view which illustrate a part of sanitary washing device concerning an embodiment.
FIG. 4A is a perspective view illustrating the switching unit 50, and FIG. 4B shows a cross section taken along the line AA shown in FIG. FIG.4(c) shows the cross section in the BB line shown in FIG.4(c).

As shown in FIG. 4A, the switching unit 50 has an inflow port 50a, an outflow port 50b, and an outflow port 50c. The outlet 50b is connected to the first drainage channel 81, and the outlet 50c is connected to the nozzle side channel 55. The hot water supplied from the mixing valve 30 flows through the inflow port 50a to either the outflow port 50b or the outflow port 50c.

The hot water that has flowed into the switching unit 50 as indicated by arrow A7 in FIG. 4B is divided into two directions, arrow A8 and arrow A9.
As shown in FIG. 4C, the switching unit 50 has a solenoid valve 150, a first valve 151, and a second valve 152. A diaphragm, for example, can be used for the first valve 151 and the second valve 152. The first valve 151 can be displaced (moved) along the direction D1. The second valve 152 can be displaced (moved) along the direction D2. FIG. 4C shows a state in which both the first valve 151 and the second valve 152 are closed.

The warm water flowing in the direction of arrow A8 in FIG. 4(b) flows through the region R1, the drainage side channel 156, and the region R2 shown in FIG. 4(c) in order by opening the first valve 151. It flows to the outlet 50b. On the other hand, the warm water that has flowed in the direction of arrow A9 in FIG. 4B passes through the region R3, the washing-side channel 157, and the region R4 shown in FIG. 4C in order by opening the second valve 152. , To the outlet 50c. The opening/closing of the first valve 151 and the opening/closing of the second valve 152 are controlled by one solenoid valve 150.

Next, switching of the flow path by the solenoid valve 150 will be described with reference to FIGS. 5A to 5C and FIGS. 6A to 6C.

FIG. 5A to FIG. 5C are a perspective view and a cross-sectional view illustrating a part of the sanitary washing device according to the embodiment.
5A is a perspective view illustrating the switching unit 50, FIG. 5B shows a cross section taken along the line C-C shown in FIG. 5A, and FIG. The cross section in the DD line shown in (a) is represented.
5B and 5C show an off state in which the solenoid valve 150 is not energized. At this time, the solenoid valve 150 is in the “closed” state, as shown in the region R7 of FIG. 5(c).

When the hot water flows into the switching unit 50 when the solenoid valve 150 is off, the hot water that has flowed toward the first valve 151 flows in the direction of arrow A10, as shown in FIG. 5B. When the warm water reaches the first valve 151, the end portion of the first valve 151 (for example, see the region R5) receives water pressure. As a result, the first valve 151 is opened, and the hot water flows into the waste water side flow passage 156.

On the other hand, as shown in FIG. 5C, the warm water flowing to the second valve 152 side flows along the direction of arrow A11. A hole is provided at the end of the second valve 152 (see, for example, the region R6). The hot water flows into the back chamber 155 provided on the back surface of the second valve 152 through the hole. When the solenoid valve 150 is off, hot water collects in the back chamber 155. As a result, the second valve 152 receives water pressure from the back surface, and the second valve 152 is in a closed state.

Thus, when hot water flows into the switching unit 50 when the electromagnetic valve 150 is off, the first valve 151 is easier to open than the second valve 152. Accordingly, by turning off the solenoid valve 150, the hot water can be made to flow to the first drainage channel 81 without flowing to the nozzle side water channel 55.

6A to 6C are a perspective view and a cross-sectional view illustrating a part of the sanitary washing device according to the embodiment.
FIG. 6A is a perspective view illustrating the switching unit 50, and FIGS. 6B and 6C show cross sections taken along the line EE shown in FIG. 6A.
6B and 6C show an ON state in which the solenoid valve 150 is energized. At this time, the solenoid valve 150 is in the “open” state, as shown in the region R8 of FIG. 6(b).

When the hot water flows into the switching unit 50 when the electromagnetic valve 150 is on, the hot water flowing to the second valve 152 side flows from the region R3 to the back chamber 155, as shown in FIG. 6B. Here, since the solenoid valve 150 is open, hot water does not collect in the back chamber 155. Therefore, the water pressure that the second valve 152 receives from the back surface is small. On the other hand, the end of the second valve 152 receives water pressure from the front side by the hot water flowing in from the region R3. As a result, the second valve 152 is opened, and the hot water flows to the nozzle through the cleaning side flow path 157 and the region R4 as shown by the arrow A12.

Further, when the second valve 152 is opened, hot water flows to the back side of the first valve 151 as shown by an arrow A13. As a result, the first valve 151 receives water pressure from the back side, as shown in FIG. 6(c).

On the other hand, when the solenoid valve 150 is on, the hot water flowing into the switching unit 50 also flows from the region R1 to the first valve 151 side. As a result, as shown in FIG. 6C, the first valve 151 receives water pressure from the front side at its end.

In this way, the first valve 151 receives water pressure from the front end portion, and also receives water pressure from the entire back surface. Since the area receiving the water pressure from the back side is larger than the area receiving the water pressure from the front side, the first valve 151 is in the closed state. That is, the hot water that has flowed in from the region R1 does not flow into the drain side flow path 156 and the region R2.

In this way, when hot water flows into the switching unit 50 when the electromagnetic valve 150 is on, the second valve 152 is easier to open than the first valve 151. Accordingly, by turning on the solenoid valve 150, the hot water can be made to flow to the nozzle side water passage 55 without flowing to the first waste water passage 81.

As described above, in the embodiment, one solenoid valve 150 can switch between a state where hot water flows to the nozzle side water passage 55 and a state where hot water flows to the first drainage passage 81. Therefore, it is not necessary to provide the switching unit 50 with two solenoid valves. Therefore, it is possible to provide a compact and low-cost sanitary washing device.

Further, as described above, when hot water flows into the switching unit 50 when the solenoid valve 150 is off, the first valve 151 is easier to open than the second valve 152. Therefore, even when the solenoid valve 150 fails and does not open, the hot water flows toward the first drainage channel 81 side. Thereby, it is possible to prevent the hot water from being unintentionally jetted from the nozzle toward the user. For example, safety can be further improved.

Next, the operation of the sanitary washing device 100 according to the embodiment will be further described with reference to FIGS. 7 and 8.
7 and 8 are timing charts illustrating specific examples of the operation of the sanitary washing device according to the embodiment.
As shown in FIG. 7, first, when the human body detection unit (for example, the seating detection sensor 404) detects a human body at time T1, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are opened. Thereby, hot water and water are supplied to the mixing valve 30, and hot water flows downstream of the mixing valve 30. At this time, the switching valve (electromagnetic valve 150) is OFF, and the hot water flows to the first drainage channel 81. The warm water is discharged from the first drainage channel 81 according to the time (flow rate) required for the warm water to reach the appropriate temperature (period P1). After that, the water supply solenoid valve and the hot water supply solenoid valve are closed, and the supply of hot water and water is stopped.

Then, for example, the user operates the operation unit 500 to start the “butt washing”. At time T2, the solenoid valve 150 is switched on. As a result, the hot water supplied from the mixing valve 30 is allowed to flow to the nozzle side water passage 55. Then, at time T3, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are opened, and hot water is supplied to the nozzle side water passage 55.

When "bottom washing" is executed, first, pre-washing (period P2) is performed, and then body washing (period P3) is performed. In the pre-cleaning, the water outlet 474 discharges water under the control of the flow rate switching valve 471 and the flow path switching valve 472 while the nozzle 473 is housed in the casing. As a result, the water outlet 474 is cleaned (self-clean; SC).

In the body cleaning in the period P3, the nozzle 473 discharges water in a state of advancing into the bowl 801 by the control by the flow rate switching valve 471 and the flow path switching valve 472. As a result, the body (outer peripheral surface) of the nozzle 473 is cleaned.

After that, by controlling the flow rate switching valve 471 and the flow path switching valve 472, the water outlet 474 for "butt washing" spouts water and the "butt" of the user sitting on the toilet seat 200 is washed (periods P4 and P5).

After that, for example, at time T4, the user operates the operation unit 500 to give an instruction to stop the “butt washing”. Then, the body wash (period P6) is performed, and subsequently the post-wash (period P7) is performed. In the body cleaning in the period P6, the nozzle 473 discharges water in a state of advancing into the bowl 801 by the control by the flow rate switching valve 471 and the flow path switching valve 472. As a result, the body (outer peripheral surface) of the nozzle 473 is cleaned. In the post-cleaning in the period P7, the water outlet 474 discharges water under the control of the flow rate switching valve 471 and the flow path switching valve 472 while the nozzle 473 is housed. As a result, the water outlet 474 is cleaned. When the post-cleaning is completed, at time T5, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are closed. That is, at time T5, the supply of hot water and water to the mixing valve 30 is stopped.

Then, at time T6, the solenoid valve 150 is closed. The flow path and flow rate of the nozzle 473 are set to the origin (predetermined initial state) (time T7). As a result, the sanitary washing device is in a standby state. (Period P10) For example, at the subsequent time T8, the seating detection sensor 404 detects the user's leaving.

FIG. 8 illustrates the operation of the sanitary washing device 100 after the time T8 shown in FIG. For example, if the state in which no seating is detected continues for a predetermined time (for example, about 5 seconds) from the detection of the separation at time T8 (time T9), the water is drained (period P11). That is, the water remaining in the nozzle 473 is discharged from the nozzle 473.

Subsequently, for example, when a predetermined time (for example, about 25 seconds) elapses after the user's separation is detected, the "separation and disinfection operation" (auto clean) is started. In the “separation seat disinfection operation”, the nozzle 470 (nozzle 473) is disinfected with the functional water (sterilized water) generated by the functional water generator 61. For example, at time T11 after the period P11, the solenoid valve 150 is turned on. At time T12 after time T11, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are opened.

Then, using the generated functional water, pre-sterilization (period P12) is performed, followed by body disinfection (period P13), and subsequent post-sterilization (period P14).

In the pre-sterilization and the post-sterilization, the discharge port 474 discharges the functional water with the nozzle 473 housed under the control of the flow rate switching valve 471 and the flow path switching valve 472. In the disinfection of the body, the nozzle 473 discharges the functional water in a state of advancing into the bowl 801, under the control of the flow rate switching valve 471 and the flow path switching valve 472. As a result, the surface and the inside of the nozzle 473 are sterilized.

When the post-sterilization is completed, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are turned off at time T16, and the solenoid valve 150 is also turned off at time T17. After that, in the period P15, the water is removed similarly to the period P11.

The sanitary washing device 100 performs the "periodic sterilization operation" when the sanitary washing device is not used (the local washing is not performed) for a certain period (period P16). The length of the period P16 is about 8 hours. For example, at time T18 after the period P16, the solenoid valve 150 is turned on. At time T19 after time T18, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are opened.

Thereafter, pre-sterilization (period P17) is performed using the generated functional water, and post-sterilization (period P18) is subsequently performed. During this time, functional water is being supplied to the nozzle. As a result, the surface and the inside of the nozzle 473 are sterilized.

When the post-sterilization is completed, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are turned off at time T16, and the solenoid valve 150 is also turned off at time T22. After that, in the period P19, the water is removed similarly to the period P11.

As described above, in the sanitary washing device 100 according to the embodiment, when supplying hot water to the nozzle 473, first, the solenoid valve 150 of the switching unit 50 is turned on (for example, time T2). After that, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are turned on (for example, time T3).
That is, the control unit 480 sets the electromagnetic valve 150 to the open (ON) state before hot water is supplied from the mixing valve 30 to the switching unit 50.

As described above, when the solenoid valve 150 is ON, the second valve 152 that controls the water passage through the nozzle side water passage 55 is easier to open than the first valve 151 that controls the water passage through the first drain passage 81. .. Therefore, by turning on the electromagnetic valve 150 before supplying the hot water to the switching unit 50, the second valve 152 is already in a state in which it is easy to open when the hot water is supplied to the switching unit 50. .. As a result, the second valve 152 can be opened smoothly and hot water can be supplied to the nozzle 473.

On the contrary, if the solenoid valve 150 is turned on after turning on the water supply solenoid valve 16 and the hot water supply solenoid valve 26, hot water is supplied to the switching unit 50 before the solenoid valve 150 is turned on. At this time, since the first valve 151 is easier to open than the second valve 152, the second valve 152 closes and the first valve 151 opens. For this reason, warm water unintentionally flows into the first drainage channel 81. Then, by turning on the solenoid valve 150, the first valve 151 is closed, the second valve 152 is opened, and hot water is supplied to the nozzle side water passage 55. That is, in this case, when supplying the hot water to the nozzle side water passage 55, the second valve 152 is once closed and then opened. Similarly, the first valve 151 is once opened and then closed. As described above, when the solenoid valve 150 is turned on after the hot water is supplied to the switching unit 50, unnecessary displacement (vibration) occurs in the first valve 151 and the second valve 152. Therefore, the switching of the flow path cannot be performed smoothly, and the operation of the switching unit 50 may become unstable. Further, it takes time to switch the flow paths, and the responsiveness to the operation of the solenoid valve 150 may be reduced.

On the other hand, in the sanitary washing device 100 according to the embodiment, the control unit 480 controls the solenoid valve 150 so that the hot water starts to flow from the mixing valve 30 to the switching unit 50 when the solenoid valve 150 is ON. , The hot water supply solenoid valve 16 and the hot water supply solenoid valve 26 are controlled. Accordingly, it is possible to suppress unnecessary displacement that occurs in the first valve 151 and the second valve 152, and stabilize the operation of the switching unit 50.

Further, in the sanitary washing device 100 according to the embodiment, when the supply of hot water to the nozzle 473 is stopped, first, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are turned off (for example, time T5). Then, the solenoid valve 150 of the switching unit 50 is turned off (for example, time T6).
That is, the control unit 480 turns off the solenoid valve 150 when the water supply solenoid valve 16 and the hot water supply solenoid valve 26 transit from ON to OFF.

In the sanitary washing device 100, the hot water is supplied to the nozzle 473 when the hot water flows into the switching unit 50, the electromagnetic valve 150 is energized, and the second valve 152 is opened. At this time, in order to stop the supply of hot water to the nozzle 473, the solenoid valve 150 is switched to OFF while the hot water flows into the switching unit 50 (that is, the water supply solenoid valve 16 and the hot water supply solenoid valve 26 are ON). Then, the first valve 151 is opened.

On the other hand, in the embodiment, the control unit 480 stops the flow of hot water into the switching unit 50 and then turns the solenoid valve 150 from the energized state (ON) to the non-energized state (OFF). Switch. This can prevent the first valve 151 from opening unnecessarily.

The embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. A person skilled in the art may make appropriate design changes to the above-described embodiment, and such modifications are also included in the scope of the present invention as long as they have the features of the present invention. For example, the shapes, dimensions, materials, arrangements, installation forms, etc. of the respective elements included in the mixing valve, the nozzle, the switching unit, the flow path, etc. are not limited to the exemplified ones but can be changed appropriately.
Further, each element included in each of the above-described embodiments can be combined as long as technically possible, and a combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

10 water supply connection part, 11 strainer, 12 check valve, 13 water stop valve, 14 water side piping part, 15 water side valve unit, 16 water supply solenoid valve, 17 water side pressure regulating valve, 20 hot water connection part, 21 strainer, 22 Check valve, 23 water stopcock, 24 hot water side pipe section, 25 hot water side valve unit, 26 hot water supply solenoid valve, 27 hot water side pressure regulating valve, 30 mixing valve, 40 safety valve section, 41 thermistor, 42 safety valve, 50 switching section, 50a inflow port, 50b outflow port, 50c outflow port, 51 1st branch part, 52 2nd branch part, 55 nozzle side waterway, 60 auto-clean unit, 61 functional water generation part, 70 headrace channel, 81 first drainage channel, 82 second drainage channel, 91 water supply pipe, 92 hot water supply pipe, 100 sanitary washing device, 110 flow path, 150 solenoid valve, 151 first valve, 152 second valve, 153 negative pressure breaking device, 154 negative pressure breaking device, 155 Back chamber, 156 drainage side flow passage, 157 washing side flow passage, 200 toilet seat, 300 toilet lid, 400 casing, 401 case plate, 402 entry detection sensor, 403 human body detection sensor, 404 seating detection sensor, 470 nozzle section, 471 Flow rate switching valve, 472 flow path switching valve, 473 nozzle, 474 water outlet, 480 control unit, 481 deodorizing unit, 482 deodorizing fan, 500 operating unit, 800 toilet, 801 bowl

Claims (3)

A mixing valve that mixes hot water and water to produce mixed water,
A nozzle for spraying the mixed water toward the human body part for cleaning.
A flow path of the mixed water,
A switching unit provided on the downstream side of the mixing valve, the switching unit having one solenoid valve;
A nozzle side water channel that branches from the switching unit and guides the mixed water to the nozzle,
A first drainage channel that branches from the switching unit and discharges the mixed water to the outside;
A flow path including
Equipped with
The switching unit,
A first valve whose water passage to the first drainage channel is controlled by the solenoid valve ;
A second valve whose water passage to the nozzle side water passage is controlled by the solenoid valve;
A rear chamber provided on the rear surface of the second valve,
Have
When the mixed water flows into the switching unit when the solenoid valve is not energized,
When the mixed water reaches the first valve, the first valve receives the water pressure of the mixed water and opens, whereby the mixed water flows into the first drainage channel,
When the mixed water flows into the rear chamber, the second valve is closed by receiving the water pressure accumulated in the rear chamber so that the mixed water does not flow into the nozzle side water passage. Cleaning device. Further provided with a control unit,
When the mixed water flows into the switching portion when the solenoid valve is energized, the second valve is easier to open than the first valve,
Wherein, in a state in which the solenoid valve is energized, claim 1, wherein the controller controls the electromagnetic valve so flows from the mixing valve of the mixing water to the switching unit is started The sanitary washing device described. Further provided with a control unit,
The sanitary washing device according to claim 1 , wherein the control unit switches the electromagnetic valve from a state in which it is energized to a state in which it is not energized when the water and the hot water do not flow into the mixing valve. apparatus.

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