JP2017125313A - Sanitary washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sanitary washing device which is compact and low cost, in the case where hot water and water are supplied separately.SOLUTION: A sanitary washing device includes: a mixing valve for generating mixed water by mixing hot water and water; a nozzle for performing washing by jetting the mixed water toward a human body private part; and a flow passage which is a flow passage for the mixed water and which includes a switching part provided on the downstream side of the mixing valve and having one solenoid valve, a nozzle side water passage branched from the switching part and for guiding the mixed water to the nozzle and a first water discharge passage branched from the switching part and for discharging the mixed water to the outside. The switching part switches, by the solenoid valve, between a state where the mixed water flows to the nozzle side water passage and a state where the mixed water flows to the first water discharge passage.SELECTED DRAWING: Figure 3

Description

  Aspects of the invention generally relate to a sanitary washing apparatus.

  A sanitary washing apparatus installed in a toilet sprays washing water from a nozzle to a 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 desirable for the sanitary washing device to inject warm water at an appropriate temperature during local washing.

  As a method for 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 place to generate hot water. The generated hot water is guided to each toilet room by piping or the like. In addition to hot water, room temperature water is led to each toilet room by 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 generates hot water (mixed water) by mixing hot water and room temperature water.

  Such a sanitary washing apparatus is provided with, for example, a nozzle-side water channel that guides hot water to the nozzle and a drainage channel that drains the hot water. And before a user performs local cleaning, a sanitary washing apparatus first drains the water that has remained in the hot water piping and the mixed water flow path and cooled by the drainage channel. Then, warm water is injected from a nozzle by a nozzle side water channel. Thereby, it becomes possible to inject warm water having an appropriate temperature in the local cleaning.

  Further, even in a general cleaning nozzle, the cleaning water remaining in the flow path to the cleaning nozzle may be cold. Therefore, there is a case where a system that drains water until a certain temperature elapses after the start of cleaning is used.

  As described above, when two flow paths are provided, a flow path for guiding the hot water to the nozzle and a flow path for discharging the hot water, an electromagnetic valve is provided in each of the two flow paths. A means for switching is common (Patent Document 1).

Japanese Patent No. 0358434

  When a solenoid valve is provided in each of the two flow paths as in Patent Document 1, the cost of manufacturing the sanitary washing device increases or the sanitary washing device becomes enlarged according to the number of solenoid valves. is there.

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

  A first invention is a mixing valve that mixes hot water and water to generate mixed water, a nozzle that sprays the mixed water toward a human body part and performs cleaning, and a flow path of the mixed water A switching unit provided on the downstream side of the mixing valve, having a single solenoid valve, a nozzle-side water channel branching from the switching unit and leading the mixed water to the nozzle, and branching from the switching unit to supply the mixed water A flow path including a first drainage channel that discharges to the outside, and the switching unit is in a state in which the mixed water flows to the nozzle-side channel by the electromagnetic valve, and the mixed water is in the first discarding channel. The sanitary washing device is characterized by switching between a state flowing into a water channel.

  According to this sanitary washing device, it is possible to switch between a state in which warm water flows to the nozzle-side water channel and a state in which warm water flows to the first drainage channel by one electromagnetic valve. For this reason, it is not necessary to provide two solenoid valves in the switching part. Accordingly, a compact and low-cost sanitary washing apparatus can be provided.

  According to a second aspect, in the first aspect, the switching unit includes a first valve that controls water flow through the first drainage channel and a second valve that controls water flow through the nozzle side water channel. And when the said mixed water flows in into the said switching part when the said solenoid valve is not energized, the said 1st valve is a sanitary washing apparatus characterized by opening more easily than the said 2nd valve.

  According to this sanitary washing device, even when the solenoid valve fails and does not open, the warm water goes to the first drainage channel side. Thereby, it can prevent that warm water is jetted toward a user unintentionally.

  According to a third aspect, in the second aspect, the control device further includes a control unit, and when the mixed water flows into the switching unit when the electromagnetic valve is energized, the second valve is the first valve. It is easier to open, and the control unit controls the electromagnetic valve so that inflow 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 electromagnetic valve is energized before the inflow of mixed water to the switching unit is started. For this reason, the second valve is in a state in which it is easy to open when the mixed water flows into the switching unit. Thereby, warm water can be smoothly supplied to a nozzle. Unnecessary displacement generated in the first valve and the second valve can be suppressed, and the operation of the switching unit can be stabilized.

  According to a fourth invention, in the second invention, further comprising a control unit, wherein the control unit is energized from a state where the electromagnetic valve is energized in a state where the water and the hot water do not flow into the mixing valve. The sanitary washing device is characterized in that it is switched to a state where it is not.

  This sanitary washing device stops the inflow of water and hot water to the mixing valve, that is, the inflow of mixed water to the switching unit, and then switches the electromagnetic valve to a non-energized state. Thereby, it can suppress that a 1st valve opens unnecessarily.

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

It is a perspective view showing the toilet apparatus provided with the sanitary washing apparatus concerning embodiment of this invention. It is a top view which illustrates the inside of the sanitary washing apparatus concerning an embodiment. It is a block diagram which illustrates a water channel in a sanitary washing device concerning an embodiment. FIG. 4A to FIG. 4C are a perspective view and a cross-sectional view illustrating a part of the sanitary washing device according to the 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. FIG. 6A to FIG. 6C are a perspective view and a cross-sectional view illustrating a part of the sanitary washing device according to the embodiment. It is a timing chart which illustrates the example of operation | movement of the sanitary washing apparatus which concerns on embodiment. It is a timing chart which illustrates the example of operation | movement of the sanitary washing apparatus which concerns on embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a perspective view showing a toilet apparatus provided with a sanitary washing device according to an embodiment of the present invention.
The toilet device shown in FIG. 1 includes a Western-style seat toilet (hereinafter simply referred to as “toilet” for convenience of explanation) 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 pivotally supported with respect to the casing 400 so as to be freely opened and closed.

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

  The casing 400 incorporates a local cleaning function unit that realizes cleaning of a user who sits on the toilet seat 200, such as a “butt”. Further, for example, in the casing 400, an entrance detection sensor 402 (human body detection means) for detecting a user entering the toilet room, a human body detection sensor 403 (human body detection means) for detecting a 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 a user sitting on the toilet seat 200, when the user operates the operation unit 500 such as a remote controller, the nozzle 473 (washing 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 entered 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. And the nozzle 473 can wash | clean the "buttock" etc. of the user who sat on the toilet seat 200 by injecting water and warm water from the water outlet 474 provided in the front-end | tip part.

  Note that 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. In other words, the seating detection sensor 404 can detect not only a user seated on the toilet seat 200 but also a user existing 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.

  In addition, the human body detection sensor 403 can detect a user in front of the toilet bowl 800, that is, a user present at a position spaced forward from the toilet seat 200. That is, the human body detection sensor 403 can detect a user who enters the toilet room and approaches the toilet seat 200. As such a human body detection sensor 403, for example, an infrared light projecting / receiving distance measuring sensor or the like can be used.

  The room entry detection sensor 402 can detect a user immediately after opening a toilet room door or entering a toilet room, or a user existing in front of the door. That is, the entrance detection sensor 402 can detect not only a user who has entered the toilet room, but also a user before entering the toilet room, that is, a user existing 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 microwave Doppler effect or a sensor that detects the object to be detected based on the amplitude (intensity) of the microwave transmitted and reflected, the user's The presence can be detected. That is, the user before entering the toilet room can be detected.

  Also, the casing 400 has a “warm air drying function” that heats the toilet seat 200 and blows warm air toward the “buttock” of the user sitting on the toilet seat 200, and a “deodorizing unit”. ”And“ indoor heating unit ”may be appropriately provided. For example, the deodorizing unit 481 includes a filter impregnated with electrolytic water or the like and a deodorizing fan 482 (see FIG. 2). Odor in the toilet room is sucked into the casing 400 by the operation of the deodorizing fan 482 and passes through the filter. Thereby, malodorous components are 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 hot 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 built 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. A switching unit 50 (switching valve unit), an auto clean unit 60 (functional water generating unit 61), a nozzle unit 470, a control unit 480, and a 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 have a portion inclined with respect to the horizontal direction for drainage or the like as appropriate. In FIG. 2, some elements in the casing 400 are omitted for convenience.

  The control unit 480 is a control circuit (microcomputer) including an IC element. The control unit 480 controls operations of electromagnetic valves and motors included in the water side valve unit 15, the hot water side valve unit 25, the nozzle unit 470, the deodorizing unit 481 (deodorizing fan 482), and the like. Further, the control unit 480 controls operations of the human body detection means, the toilet seat heater, the auto 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 piping section 14. The water side piping unit 14 includes a strainer 11, a check valve 12 provided on the downstream side of the strainer 11, and a water stop 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 unit 10. Thereby, 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 connector 10. The water side valve unit 15 includes a water supply electromagnetic 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 electromagnetic 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 supply of water is stopped. The water side pressure regulating valve 17 includes, for example, a valve (piston) provided in a cylinder and biased by a spring or the like. The opening degree of the valve changes in accordance with the pressure of water flowing into the cylinder and the urging force of a spring or the like. Thereby, the water side pressure regulation valve 17 adjusts the pressure of the 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 side piping section 24. The hot water side piping section 24 includes a strainer 21, a check valve 22 provided on the downstream side of the strainer 21, and a stop cock 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 portion 20. Thereby, the hot water supply connection part 20 supplies the heated hot water to the sanitary washing device 100. A hot water side valve unit 25 is provided on the downstream side of the hot water supply connection portion 20. The hot water side valve unit 25 includes a hot water supply electromagnetic valve 26 and a hot water side pressure regulating valve 27 on the downstream side thereof. A mixing valve 30 is provided on the downstream side of the hot water side valve unit 25. By opening and closing the hot water supply electromagnetic 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 side pressure regulating valve 27 includes, 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 hot water flowing into the cylinder and the urging force of a spring or the like. Thereby, the hot water side 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. Thereby, warm water (mixed water) at an appropriate temperature can be supplied to the downstream side, and can be ejected from the nozzle 473. In the present specification, “warm 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. Unless otherwise specified, the temperature of the hot water is not limited.

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

  A safety valve unit 40 is provided on the downstream side of the mixing valve 30. The safety valve unit 40 includes a thermistor 41 and a safety valve 42. The safety valve 42 includes, 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 an arrow A4 shown in FIGS. Accordingly, the hot water is drained from the opening provided in front of the case plate 401 to the outside (for example, the bowl 801).

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

  The first branching unit 51 is provided with a switching unit 50 (switching valve unit). The switching unit 50 includes a solenoid valve 150. Thereby, the 1st branch part 51 switches the flow path of the warm water supplied from the mixing valve 30. That is, the state where the warm water flows into the nozzle-side water channel 55 and the state where the warm water flows into the first drainage channel 81 are switched by ON / OFF of the electromagnetic valve 150. Hot water does not have to flow through both the nozzle-side water channel 55 and the first waste water channel 81 at the same time.

  A negative pressure breaking device 153 is provided in the first drainage channel 81. The warm water that has flowed into 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 externally provided from an opening provided in front of the case plate 401 (for example, the bowl 801). 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 flow path of hot water or hot water and the hot water remaining in the flow path may be cold. Moreover, the mixing valve 30 can adjust the temperature of the hot water by flowing a predetermined amount or more of water and hot water through the mixing valve 30. For this reason, immediately after the user starts using, the temperature of the hot water supplied from the mixing valve 30 may be low for the user. Therefore, the sanitary washing device 100 discards a predetermined amount of hot water to the first drainage channel 81 after detecting the seating of the human body. For example, in the mixing valve 30, the warm water is caused to flow into the first drainage channel 81 until the warm water reaches an appropriate temperature.

  Thereafter, for example, when the user performs the local cleaning, the operation unit 500 is operated, whereby the flow path is switched by the electromagnetic valve 150. Thereby, the hot water flows into the nozzle side water channel 55. The nozzle-side water channel 55 includes a second branch portion 52, a water conduit 70, and a second water drainage channel 82. The water conduit 70 and the second drainage channel 82 are respectively provided on the downstream side of the second branch portion 52 and branch from the second branch portion 52.

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

The nozzle unit 470 includes a flow rate switching valve 471, a flow path switching valve 472, and a nozzle 473. The flow rate switching valve 471 and the flow path switching valve 472 can adjust the water flow in the nozzle 473 and switch the water discharge port 474 for discharging water.
As described above, warm water (mixed water) having an appropriate temperature can be ejected from the nozzle 473.

  An auto clean unit 60 and a negative pressure breaking 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 generator 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 generator 61 includes an electrolytic cell, and generates functional water containing hypochlorous acid by electrolyzing tap water (hot water) flowing inside the electrolytic cell. The auto clean unit 60 supplies functional water to the nozzle part 470 after the sanitary washing device 100 is used. Thereby, the outer peripheral surface (body) of the nozzle 473 can be sterilized.

  “Functional water” refers to a solution containing more disinfecting components such as hypochlorous acid than tap water. Moreover, the functional water produced | generated in the functional water production | generation part 61 may be the solution containing metal ions, such as silver ion and copper ion, the solution containing electrolytic chlorine, ozone, etc. The functional water may be acidic water or alkaline water. In the embodiment, the sterilizing water generating unit is not limited to the electrolytic cell. For example, the sterilized water may be generated by dissolving a sterilizing agent or a sterilizing solution in water.

FIG. 4A to FIG. 4C are a perspective view and a cross-sectional view illustrating a part of the sanitary washing device according to the embodiment.
FIG. 4A is a perspective view illustrating the switching unit 50, and FIG. 4B represents 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 includes an inflow port 50a, an outflow port 50b, and an outflow port 50c. The outlet 50 b is connected to the first drainage channel 81, and the outlet 50 c is connected to the nozzle side water 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 shown by an arrow A7 in FIG. 4B is divided into two directions, an arrow A8 and an arrow A9.
As illustrated in FIG. 4C, the switching unit 50 includes a solenoid valve 150, a first valve 151, and a second valve 152. For the first valve 151 and the second valve 152, for example, a diaphragm can be used. 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 where both the first valve 151 and the second valve 152 are closed.

  When the first valve 151 is opened, the warm water that has flowed in the direction of the arrow A8 in FIG. 4B passes through the region R1, the drain side channel 156, and the region R2 shown in FIG. It flows to the outlet 50b. On the other hand, the hot water flowing in the direction of the arrow A9 in FIG. 4B passes through the region R3, the cleaning side flow channel 157, and the region R4 shown in FIG. 4C in order by opening the second valve 152. , Flows to the outlet 50c. The opening and closing of the first valve 151 and the opening and closing of the second valve 152 are controlled by one electromagnetic valve 150.

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

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.
FIG. 5A is a perspective view illustrating the switching unit 50, FIG. 5B shows a cross section taken along line CC shown in FIG. 5A, and FIG. 5C shows FIG. The cross section in the DD line shown to (a) is represented.
FIG. 5B and FIG. 5C show an off state in which the solenoid valve 150 is not energized. At this time, the electromagnetic valve 150 is in the “closed” state as shown in a region R7 in FIG.

  When hot water flows into the switching unit 50 when the solenoid valve 150 is off, as shown in FIG. 5B, the hot water that has flowed to the first valve 151 side flows along the direction of the arrow A10. When the hot water reaches the first valve 151, the end of the first valve 151 (see, for example, 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 channel 156.

  On the other hand, as shown in FIG.5 (c), the warm water which flowed to the 2nd valve 152 side flows along the direction of arrow A11. The end of the second valve 152 is provided with a hole (see, for example, the region R6). The hot water flows through the hole into the back chamber 155 provided on the back surface of the second valve 152. In the state where the electromagnetic valve 150 is off, hot water is accumulated in the back chamber 155. Thereby, the 2nd valve 152 receives a hydraulic pressure from the back, and the 2nd valve 152 will be in the closed state.

  Thus, when warm 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. Thereby, by turning off the solenoid valve 150, the hot water can be allowed to flow to the first waste water channel 81 without flowing to the nozzle side water channel 55.

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

  When hot water flows into the switching unit 50 when the electromagnetic valve 150 is on, the hot water that has flowed to the second valve 152 side flows from the region R3 to the back chamber 155, as shown in FIG. 6B. Here, since the electromagnetic valve 150 is open, hot water does not accumulate in the back chamber 155. For this reason, the water pressure which the 2nd valve 152 receives from a 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 from the region R3. Thereby, the 2nd valve 152 opens, and as shown to arrow A12, warm water flows through the washing | cleaning side flow path 157 and area | region R4 to a nozzle.

  Moreover, when the 2nd valve 152 opens, warm water will flow into the back side of the 1st valve 151 like arrow A13. Thereby, the 1st valve 151 receives water pressure from the back side, as shown in Drawing 6 (c).

  On the other hand, when the solenoid valve 150 is on, the hot water that has flowed into the switching unit 50 also flows from the region R1 to the first valve 151 side. Thereby, as shown in FIG.6 (c), the 1st valve 151 receives a water pressure from the front side in the edge part.

  Thus, the first valve 151 receives water pressure from the entire rear surface while receiving water pressure from the front end. Since the area that receives the water pressure from the back side is larger than the area that receives the water pressure from the front side, the first valve 151 is closed. That is, the hot water that has flowed in from the region R1 does not flow to the drain side channel 156 and the region R2.

  Thus, when warm 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. Thereby, by turning on the solenoid valve 150, the hot water can be flowed to the nozzle side water passage 55 without flowing to the first drainage passage 81.

  As described above, in the embodiment, it is possible to switch between a state in which warm water flows to the nozzle-side water passage 55 and a state in which hot water flows to the first drainage passage 81 by one electromagnetic valve 150. For this reason, it is not necessary to provide two solenoid valves in the switching unit 50. Accordingly, a compact and low-cost sanitary washing apparatus can be provided.

  Further, as described above, when warm 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. For this reason, even when the solenoid valve 150 fails and does not open, the warm water goes to the first drainage channel 81 side. Thereby, it can prevent that warm water is jetted toward a user unintentionally. For example, safety can be further improved.

Next, with reference to FIG.7 and FIG.8, operation | movement of the sanitary washing apparatus 100 which concerns on embodiment is further demonstrated.
7 and 8 are timing charts illustrating a specific example of the operation of the sanitary washing device according to the embodiment.
As shown in FIG. 7, first, when the human body detecting means (for example, the seating detection sensor 404) detects a human body at time T1, the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are opened. As a result, 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 (solenoid 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) necessary for the warm water to reach an appropriate temperature (period P1). Thereafter, the water supply electromagnetic valve and the hot water supply electromagnetic valve are closed, and the supply of hot water and water is stopped.

  Thereafter, for example, when the user operates the operation unit 500, “wet washing” is started. At time T2, the electromagnetic valve 150 is switched ON. As a result, the hot water supplied from the mixing valve 30 can flow into the nozzle-side water channel 55. At time T3, the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are opened, and hot water is supplied to the nozzle side water passage 55.

  When “wet cleaning” is performed, first, pre-cleaning (period P2) is performed, and then body cleaning (period P3) is performed. In the pre-cleaning, the water discharge port 474 discharges water under the control of the flow rate switching valve 471 and the flow path switching valve 472 with the nozzle 473 housed in the casing. Thereby, the water discharge port 474 is washed (self-clean; SC).

  In the body cleaning in the period P3, the nozzle 473 discharges water in a state where the nozzle 473 has advanced 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 body (outer peripheral surface) of the nozzle 473 is cleaned.

  Thereafter, under the control of the flow rate switching valve 471 and the flow path switching valve 472, the water discharge port 474 for “wet washing” discharges water to wash the “wet” of the user seated on the toilet seat 200 (periods P4 and P5).

  Thereafter, for example, at time T4, the user operates the operation unit 500 to instruct to stop “wet washing”. Then, body cleaning (period P6) is performed, and then post-cleaning (period P7) is performed. In the body cleaning in the period P6, the nozzle 473 discharges water in a state where the nozzle 473 has advanced 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 body (outer peripheral surface) of the nozzle 473 is cleaned. In the post-cleaning of 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 with the nozzle 473 housed. Thereby, the water discharge port 474 is washed. When the post-cleaning is completed, the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are closed at time T5. That is, at time T5, the supply of hot water and water to the mixing valve 30 is stopped.

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

  FIG. 8 illustrates the operation of the sanitary washing device 100 after time T8 shown in FIG. For example, if a state in which seating is not detected continues for a predetermined time (for example, about 5 seconds) from the detection of sitting at time T8 (time T9), draining is performed (period P11). That is, 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 sterilization operation” (auto clean) is started. In the “sequestration sterilization operation”, the nozzle unit 470 (nozzle 473) is sterilized with the functional water (sanitized water) generated by the functional water generation unit 61. For example, the electromagnetic valve 150 is turned on at time T11 after the period P11. At time T12 after time T11, the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are opened.

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

  In pre-sterilization and post-sterilization, the water outlet 474 discharges functional water in a state in which the nozzle 473 is housed under the control of the flow rate switching valve 471 and the flow path switching valve 472. In the body sterilization, the nozzle 473 discharges functional water in a state where the nozzle 473 has advanced into the bowl 801 under the control of the flow rate switching valve 471 and the flow path switching valve 472. Thereby, the surface and the inside of the nozzle 473 are sterilized.

  When the post-sterilization ends, the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are turned off at time T16, and the electromagnetic valve 150 is also turned off at time T17. Thereafter, in the period P15, water is drained in the same manner as in the period P11.

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

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

  When the post-sterilization ends, the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are turned off at time T16, and the electromagnetic valve 150 is also turned off at time T22. Thereafter, in the period P19, water is drained in the same manner as in 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 electromagnetic valve 150 of the switching unit 50 is turned ON (for example, time T2). Thereafter, the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are turned ON (for example, time T3).
That is, the controller 480 opens (ON) the electromagnetic valve 150 before hot water is supplied from the mixing valve 30 to the switching unit 50.

  As already described, when the solenoid valve 150 is ON, the second valve 152 that controls the water flow through the nozzle side water passage 55 is easier to open than the first valve 151 that controls the water flow through the first drainage channel 81. . For this reason, the electromagnetic valve 150 is turned ON before the hot water is supplied to the switching unit 50, so that the second valve 152 is already easily opened when the hot water is supplied to the switching unit 50. . Thereby, the 2nd valve 152 can be opened smoothly and warm water can be supplied to the nozzle 473. FIG.

  Conversely, when the electromagnetic valve 150 is turned on after the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are turned on, hot water is supplied to the switching unit 50 before the electromagnetic 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 is closed and the first valve 151 is opened. For this reason, unintentionally, warm water will flow into the 1st drainage channel 81. Thereafter, when the electromagnetic valve 150 is turned ON, the first valve 151 is closed, the second valve 152 is opened, and hot water is supplied to the nozzle-side water channel 55. That is, in this case, when supplying warm water to the nozzle side water channel 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 electromagnetic 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. For this reason, the flow path switching cannot be performed smoothly, and the operation of the switching unit 50 may become unstable. In addition, it takes time to switch the flow path, and the responsiveness to the operation of the electromagnetic 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 electromagnetic valve 150 so that the warm water starts to flow from the mixing valve 30 to the switching unit 50 when the electromagnetic valve 150 is ON. The water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are controlled. Thereby, the unnecessary displacement which arises in the 1st valve 151 and the 2nd valve 152 can be controlled, and the operation of switching part 50 can be stabilized.

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 electromagnetic valve 16 and the hot water supply electromagnetic valve 26 are turned off (for example, time T5). Thereafter, the electromagnetic valve 150 of the switching unit 50 is turned off (for example, time T6).
That is, the control unit 480 turns off the electromagnetic valve 150 when the water supply electromagnetic valve 16 and the hot water supply electromagnetic valve 26 transition from ON to OFF.

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

  On the other hand, in the embodiment, the control unit 480 stops the inflow of the hot water to the switching unit 50 and then changes the electromagnetic valve 150 from the energized state (ON) to the non-energized state (OFF). Switch. Thereby, it can suppress that the 1st valve 151 opens unnecessarily.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, size, material, arrangement, installation form, and the like of each element included in the mixing valve, nozzle, switching unit, flow path, and the like are not limited to those illustrated, and can be changed as appropriate.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  DESCRIPTION OF SYMBOLS 10 Water 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 regulation valve, 20 Hot water supply connection part, 21 Strainer, 22 Check valve, 23 stop cock, 24 hot water side piping section, 25 hot water side valve unit, 26 hot water 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 Inlet, 50b Outlet, 50c Outlet, 51 First branch, 52 Second branch, 55 Nozzle-side water channel, 60 Auto clean unit, 61 Functional water generator, 70 Water conduit, 81 First water 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 1 valve, 152 second valve, 153 negative pressure breaking device, 154 negative pressure breaking device, 155 back chamber, 156 drainage side flow channel, 157 washing side flow channel, 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 part, 471 flow rate switching valve, 472 flow path switching valve, 473 nozzle, 474 water outlet, 480 control part, 481 deodorizing unit, 482 deodorizing fan, 500 operation parts, 800 toilet bowl, 801 bowl

Claims (4)

A mixing valve that mixes hot water and water to produce mixed water;
A nozzle that performs washing by spraying the mixed water toward a human body part;
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 that branches from the switching unit and guides the mixed water to the nozzle;
A first drainage channel branched from the switching unit and discharging the mixed water to the outside;
A flow path including:
With
The sanitary washing device, wherein the switching unit switches between a state in which the mixed water flows into the nozzle-side water channel and a state in which the mixed water flows into the first drainage channel by the electromagnetic valve. The switching unit is
A first valve that controls water flow through the first drainage channel;
A second valve for controlling water flow through the nozzle-side water channel;
Have
The sanitary washing device according to claim 1, wherein when the mixed water flows into the switching unit when the solenoid valve is not energized, the first valve is easier to open than the second valve. A control unit;
When the mixed water flows into the switching unit when the solenoid valve is energized, the second valve is easier to open than the first valve,
The control unit controls the electromagnetic valve so that inflow of the mixed water from the mixing valve to the switching unit is started in a state where the electromagnetic valve is energized. The sanitary washing device described. A control unit;
The sanitary washing according to claim 2, wherein the control unit switches the solenoid valve from an energized state to an unenergized state in a state where the water and the hot water do not flow into the mixing valve. apparatus.

Images