JP2012082615A - Sanitary washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sanitary washing device which can more efficiently sterilize a toilet bowl.SOLUTION: A sanitary washing device comprises a nozzle which has a discharge port and ejects water from the discharge port for washing a user's body, a first channel which leads the water supplied from a supply source to the discharge port, a sterile water supply part which is arranged at midstream of the first channel and can generate sterile water, a spray part which sprays at least one of the water and the sterile water to the surface of the toilet bowl, a second channel which branches from the first channel and leads the sterile water to the spray part, a channel selector valve which can select a supply destination of the sterile water between the first channel and the second channel, and a control part which controls spraying of the sterile water from the spray part such that the sterile water preliminarily reserved in the second channel is sprayed.

Description

  Aspects of the present invention generally relate to a sanitary washing device, and more specifically to a sanitary washing device capable of sterilizing or washing a toilet bowl.

  For example, there is a toilet seat device having a nozzle function for discharging hypochlorous acid into a toilet (Patent Document 1). The toilet seat device described in Patent Document 1 can clean the toilet bowl by discharging hypochlorous acid from the nozzle mechanism to the entire ball space of the toilet bowl.

  Moreover, there exists a sanitary washing apparatus provided with the metal ion elution means and the atomization means (patent document 2). In the sanitary washing device described in Patent Document 2, water containing bactericidal metal ions is supplied into the toilet bowl by the atomizing means, so that the rim portion of the upper open edge of the toilet bowl, which has been difficult in the past, has been difficult. It becomes possible to sterilize microorganisms. Furthermore, in the sanitary washing apparatus described in Patent Document 2, the first outlet flow channel connected to the buttocks nozzle, the second outlet flow channel connected to the bidet nozzle, and the atomizing means are connected via the bactericidal metal ion elution means. The third outlet channel is selectively communicated.

  Here, according to the toilet seat apparatus described in Patent Document 1, not only the toilet body but also the anal part of the human body and the local part of the woman are washed by the water discharged from the nozzle mechanism. In general, water (including hot water) is used for cleaning the human body part. Therefore, when the same flow path is used in the case where the sterilizing water is guided and in the case where the water is guided, water may remain in the flow path.

  For this reason, when sterilizing water is introduced in a state where water remains in the flow path and discharged to the toilet, the sterilizing water at the initial stage of discharge is diluted, so that the sterilizing effect may not be obtained as expected. . Moreover, it is necessary to continue discharging sterilizing water until the density | concentration of sterilizing water fully increases, and a longer time may be required. Then, when discharging sterilizing water before using a toilet bowl, usability is not so good. Moreover, when producing electrolyzed water containing hypochlorous acid or the like, the electrolyzer may be energized after passing through water, so the electrolyzed water at the initial stage of electrolysis may be diluted and a predetermined concentration may not be ensured. .

JP 2000-144846 A JP 2008-163716 A

  This invention is made | formed based on recognition of this subject, and it aims at providing the sanitary washing apparatus which can sterilize a toilet bowl more efficiently.

  1st invention has a water outlet, the nozzle which injects water from the said water outlet, and wash | cleans a user's body, The 1st flow path which guides the water supplied from a water supply source to the said water outlet A sterilizing water supply unit provided in the middle of the first flow path and capable of generating sterilizing water; a spraying unit for spraying at least one of the water and the sterilizing water onto a surface of a bowl of the toilet; A second flow path that branches from one flow path and guides the sterilizing water to the spraying section, and a flow that can switch the sterilizing water supply destination to the first flow path and the second flow path. When the spray water is sprayed from the spray switching unit and the spray switch, the control unit executes control for spraying the sterile water stored in the second flow path in advance. This is a sanitary washing device.

  According to this sanitary washing device, when spraying the sterilizing water from the spraying unit, the control unit sprays the sterilizing water stored in advance in the second flow path. For this reason, it is possible to suppress spraying of the clean water or diluted sterilized water remaining in the first flow path and the second flow path from the spray section. Thereby, the control part can spray the sterilized water whose production | generation density | concentration was stabilized from the spraying initial stage. Therefore, the surface of the bowl of the toilet bowl can be sterilized more efficiently. Moreover, since the density | concentration of sterilization water is ensured from the initial stage of spraying, the surface of the bowl of a toilet bowl can be sterilized in a shorter time.

  The second invention further includes a human body detection unit capable of detecting a human body in the first invention, and the control unit receives the detection signal of the human body from the human body detection unit, and the sterilizing water supply unit The sanitary washing apparatus controls the flow path switching valve and stores the sterilized water in the second flow path.

  According to this sanitary washing device, when receiving a human body detection signal from the human body detection unit, the control unit stores the sterilized water in the second flow path. Therefore, in the so-called premist operation before the user performs the stool action, the control unit can store sterilized water in the second flow path in advance. Thereby, the control unit can spray the sterilizing water from the spraying unit both before and after “wet washing”.

  In a third aspect based on the first or second aspect, the controller controls the flow path switching valve so that the water is applied to the surface of the bowl from the spray section before the toilet is used. The sanitary washing apparatus is characterized in that the sterilizing water supply unit is controlled and then the sterilizing water is stored in the second flow path.

  According to this sanitary washing device, the control unit sprays water from the spraying unit on the surface of the bowl before the toilet is used, and then stores the sterilizing water in the second flow path. That is, the control unit causes the sterilizing water to be introduced in the second half of the premist operation, and stores the sterilizing water in the second flow path. Therefore, the operation of storing the sterilizing water by the control unit is performed continuously with the premist operation. Thereby, the control unit can store the sterilized water in the second flow path without giving the user a sense of incongruity.

  According to a fourth aspect of the present invention, in the first to third aspects, the sterilizing water is electrolyzed water.

  According to this sanitary washing apparatus, since the sterilizing water is electrolyzed water, for example, work such as periodically replenishing a sterilizing agent can be omitted. Thereby, the maintenance work for supplying sterilizing water, etc. can be reduced.

  According to the aspect of the present invention, a sanitary washing device capable of sterilizing a toilet bowl more efficiently is provided.

It is a schematic diagram showing the toilet apparatus provided with the sanitary washing apparatus concerning embodiment of this invention. It is a block diagram showing the principal part structure of the sanitary washing apparatus concerning this embodiment. It is a flowchart figure which illustrates operation | movement of the sanitary washing apparatus concerning this embodiment. It is a block diagram showing the principal part structure of the sanitary washing apparatus concerning other embodiment of this invention. It is a cross-sectional schematic diagram which illustrates the electrolytic cell unit of this embodiment. It is a timing chart figure showing the specific example of operation | movement of the sanitary washing apparatus concerning this embodiment, and the state of a flow path.

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.
Drawing 1 is a mimetic diagram showing the toilet device provided with the sanitary washing device concerning an embodiment of the invention.
Moreover, FIG. 2 is a block diagram showing the principal part structure of the sanitary washing apparatus concerning this embodiment. In addition, in FIG. 1, for convenience of explanation, a schematic diagram representing a sanitary washing device is a schematic plan view, and a schematic diagram representing a Western-style sitting toilet is a schematic sectional view. FIG. 2 also shows the main configuration of the water channel system and the electrical system.

  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.

  For example, a spray nozzle (spraying part) 480 that sprays sterilizing water on the surface of the bowl 801 of the toilet bowl 800 is provided at the lower part of the casing 400. The spray nozzle 480 may be provided inside the casing 400 or may be attached outside the casing 400.

  Inside the casing 400 is incorporated a body washing function unit that implements washing of a user who sits on the toilet seat 200 such as a “butt”. Further, for example, as shown in FIG. 2, the casing 400 is provided with a seating detection sensor 404 that detects that the user is sitting on the toilet seat 200. When the seating detection sensor 404 detects a user sitting on the toilet seat 200, when the user operates an operation unit (not shown) such as a remote controller, the cleaning nozzle 473 can be advanced into the bowl 801 of the toilet 800. it can. In the sanitary washing device 100 shown in FIG. 1, the washing nozzle 473 is stored in the casing 400.

  As shown in FIG. 2, one or a plurality of water discharge ports 474 are provided at the tip of the cleaning nozzle 473. Then, the washing nozzle 473 can wash water such as a “butt” of a user sitting on the toilet seat 200 by ejecting water from a water discharge port 474 provided at the tip of the washing nozzle 473. In the present specification, “water” includes not only cold water but also heated hot water.

  More specifically, as shown in FIG. 2, the sanitary washing device 100 according to the present embodiment guides water supplied from a water supply source such as a water supply or a water storage tank to the water outlet 474 of the washing nozzle 473. 1 channel 21. An electromagnetic valve 431 is provided on the upstream side of the first flow path 21. The electromagnetic valve 431 is an electromagnetic valve that can be opened and closed, and controls the supply of water based on a command from the control unit 405 provided in the casing 400. The first flow path 21 is a secondary side downstream from the electromagnetic valve 431.

  A heat exchanger unit 440 is provided downstream of the electromagnetic valve 431. The heat exchanger unit 440 has a hot water heater (not shown). The hot water heater heats the supplied water to obtain predetermined hot water. The hot water temperature can be set, for example, by a user operating an operation unit such as a remote controller.

  An electrolytic cell unit (sterilizing water supply unit) 450 capable of supplying sterilizing water is provided downstream of the heat exchanger unit 440. The surface of the bowl 801 of the toilet bowl 800, the cleaning nozzle 473, and the first flow path 21 on the downstream side of the electrolytic cell unit 450 are sterilized with sterilizing water generated in the electrolytic cell unit 450. The electrolytic cell unit 450 will be described in detail later.

  A strainer 491 and a vacuum breaker (VB) 493 are provided downstream of the electrolytic cell unit 450. The strainer 491 is a filter of about 80 mesh, for example, and removes foreign matters mixed in the supplied water. The vacuum breaker 493 promotes drainage of the flow path between the heat exchanger unit 440 and the cleaning nozzle 473 and the spray nozzle 480.

  A pressure modulation device 460 is provided downstream of the strainer 491 and the vacuum breaker 493. The pressure modulation device 460 can pulsate the water flow in the first flow path 21 and pulsate the water discharged from the water discharge port 474 of the cleaning nozzle 473. However, in the present invention, the pressure modulation device 460 is not necessarily provided.

  Downstream of the pressure modulator 460, a flow control / flow path switching valve (flow path) that adjusts the water flow (flow rate) and opens / closes or switches the water supply to the cleaning nozzle 473, the spray nozzle 480, and the nozzle cleaning chamber 478. A switching valve) 471 is provided. The first flow path 21 includes a second flow path 23 for guiding sterilized water and clean water to the spray nozzle 480 and a second flow path for guiding sterilized water and clean water to the nozzle cleaning chamber 478 in the flow control / flow path switching valve 471. 3 flow paths 25. The flow control / flow path switching valve 471 is configured to guide the sterilized water or clean water to the first flow path 21 based on a command from the control unit 405 and to pass the sterilized water or clean water to the second flow path. The state leading to 23 and the state leading sterilized water or clean water to the third flow path 25 can be switched.

  The spray nozzle 480 can sterilize bacteria present on the surface of the bowl 801 of the toilet bowl 800 by spraying sterilizing water on the surface of the bowl 801 of the toilet bowl 800. As a result, the spray nozzle 480 can suppress “dullness” generated on the surface of the bowl 801, and can suppress so-called “wager”. Furthermore, the surface of the bowl 801 can be made whiter (whitening).

The washing nozzle 473 can wash a “buttock” of a user sitting on the toilet seat 200 by jetting water. Alternatively, the cleaning nozzle 473 can sterilize the portion of the water outlet 474 of the cleaning nozzle 473 itself by spraying sterilizing water from the water outlet 474.
The nozzle cleaning chamber 478 can sterilize or clean the outer peripheral surface (body) and the water outlet 474 of the cleaning nozzle 473 by spraying sterilizing water or water.

  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, for example, as shown in FIG. 2, the casing 400 includes an entrance detection sensor (human body detection unit) 402 that detects a user entering the toilet room, and a human body that detects a user in front of the toilet seat 200. A detection sensor (human body detection unit) 403 is provided.

  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 entrance detection sensor 402 can detect a user immediately after opening a toilet room door or entering a toilet room and a user existing in front of the door trying to enter the toilet room. 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.

  When the toilet lid 300 is closed, the room entry detection sensor 402 detects the user's room entry through a transmission window (not shown) provided near the base. For example, when the room entry detection sensor 402 detects a user, the control unit 405 can automatically open the toilet lid 300 based on the detection result of the room entry detection sensor 402. In addition, the installation form of the seating detection sensor 404, the human body detection sensor 403, and the entrance detection sensor 402 is not particularly limited, and can be changed as appropriate.

  FIG. 3 is a flowchart illustrating the operation of the sanitary washing device according to this embodiment. When the control unit 405 receives a signal for starting the operation of storing the sterilizing water (step S11), the control unit 405 controls the electrolytic cell unit 450 and the flow control / flow path switching valve 471 to generate the sterile water generated in the electrolytic cell unit 450. Is stored in the second flow path 23 (step S13). That is, the control unit 405 starts energization of the electrolytic cell unit 450 to generate sterilizing water, and controls the flow control / flow path switching valve 471 to guide the sterilizing water to the second flow path.

  The timing at which the control unit 405 receives the signal for starting the operation of storing the sterilized water is, for example, the timing at which the control unit 405 receives a detection signal when the entrance detection sensor 402 or the human body detection sensor 403 detects the user. . Or the timing which the control part 405 receives the signal which starts the operation | movement which stores sterilization water is timing when predetermined time passes after the seating detection sensor 404 stops detecting the user who seated on the toilet seat 200, for example. Or the timing which the control part 405 receives the signal which starts the operation | movement which stores sterilization water is a timing which the sterilization of the washing nozzle 473 performed after a user performs "wet washing" is completed, for example. In addition, the timing which the control part 405 receives the signal which starts the operation | movement which stores sterilization water is not necessarily limited to this.

  Subsequently, when the control unit 405 receives a signal for starting the operation of spraying sterilizing water from the spray nozzle 480 (step S15), the spray nozzle 480 stores the sterilized water stored in advance in the second flow path 23 in step S13. (Step S17).

  Here, when the control unit 405 sprays sterilizing water from the spray nozzle 480, clean water may remain inside the first flow path 21 and the second flow path 23.

  Therefore, when the control unit 405 sprays sterilizing water from the spray nozzle 480 in the state where clean water remains in the first channel 21 and the second channel 23, the sterilizing water at the initial stage of spraying is diluted. Therefore, the bactericidal effect may not be obtained as expected. If it does so, the microbe which exists in the surface of the bowl 801 of the toilet bowl 800 cannot fully be sterilized. Moreover, it is necessary to continue spraying sterilizing water until the density | concentration of sterilizing water fully increases, and a longer time may be required.

  On the other hand, in the present embodiment, the control unit 405 controls the electrolytic cell unit 450 and the flow control / flow path switching valve 471 so that the sterilized water generated in the electrolytic cell unit 450 is supplied to the second flow path 23. Store (step S13). Subsequently, the control unit 405 sprays sterilized water stored in advance in the second flow path 23 from the spray nozzle 480 (step S17). That is, in the present embodiment, sterilized water stored in advance in the second flow path 23 is used as the sterilized water sprayed from the spray nozzle 480 by the control unit 405.

Thereby, the control part 405 can spray the sterilized water with which the production | generation density | concentration was stabilized from the spraying initial stage. Therefore, the surface of the bowl 801 of the toilet bowl 800 can be sterilized more efficiently. Moreover, since the density | concentration of sterilization water is ensured from the spraying initial stage, the surface of the bowl 801 of the toilet bowl 800 can be sterilized in a shorter time.
In the present embodiment, the control unit 405 stores sterilized water in the second flow path 23 in advance. Therefore, before the control unit 405 sprays the sterilizing water from the spray nozzle 480, the inside of the second flow path 23 can be sterilized.

FIG. 4 is a block diagram showing a main part configuration of a sanitary washing device according to another embodiment of the present invention.
In addition, FIG. 4 shows the principal part structure of the waterway system and the electric system together like FIG.

  In the present embodiment, a three-way valve (flow path switching valve) 420 is provided downstream of the heat exchanger unit 440. The three-way valve 420 is in a state in which sterilized water or clean water is guided to the first flow path 21 based on a command from the control unit 405, as in the flow control / flow path switching valve 471 described above with reference to FIG. It is possible to switch between a state in which water or clean water is guided to the second flow path 23. Further, a strainer 491 and a vacuum breaker 493 are provided downstream of the three-way valve 420 and in the middle of the second flow path 23. The other main configuration is the same as the main configuration described above with reference to FIG.

  Also in this embodiment, the surface of the bowl 801 of the toilet bowl 800 can be sterilized more efficiently by the control unit 405 executing the same control as the control described above with reference to FIG. Moreover, since the density | concentration of sterilization water is ensured from the spraying initial stage, the surface of the bowl 801 of the toilet bowl 800 can be sterilized in a shorter time. Further, in the present embodiment, the lengths of the first flow path 21 and the second flow path 23 between the electrolytic cell unit 450 and the spray nozzle 480 are made shorter than in the case of the main configuration described above with reference to FIG. be able to. Therefore, the time from when the control unit 405 starts energizing the electrolytic cell unit 450 to when the sterilizing water is sprayed from the spray nozzle 480 can be further shortened. In other words, the time for which the control unit 405 stores the sterilized water generated in the electrolytic cell unit 450 in the second flow path 23 can be further shortened. Thereby, the usability of the sanitary washing device 100 can be further improved.

FIG. 5 is a schematic cross-sectional view illustrating the electrolytic cell unit of this embodiment.
As shown in FIG. 5, the electrolytic cell unit 450 includes an anode plate 451 and a cathode plate 452 inside thereof, and can electrolyze tap water flowing through the inside by controlling energization from the control unit 405. Here, tap water contains chlorine ions. This chloride ion is contained as salt (NaCl) or calcium chloride (CaCl ₂ ) in a water source (for example, groundwater, dam water, river water, etc.). Therefore, hypochlorous acid is produced by electrolyzing the chlorine ions. As a result, the water electrolyzed in the electrolytic cell unit 450 (electrolyzed water) changes to a liquid containing hypochlorous acid.

  Hypochlorous acid functions as a sterilizing component, and the liquid containing hypochlorous acid, that is, sterilizing water, can efficiently remove or decompose or sterilize dirt caused by ammonia or the like. As used herein, “sterilizing water” refers to a liquid containing more sterilizing components such as hypochlorous acid than tap water (also simply referred to as “water”).

  The sterilizing water (electrolyzed water) generated in the electrolytic cell unit 450 may be a liquid containing metal ions such as silver ions and copper ions. Alternatively, the sterilizing water generated in the electrolytic cell unit 450 may be a liquid containing electrolytic chlorine, ozone, or the like. Alternatively, the sterilizing water generated in the electrolytic cell unit 450 may be acidic water or alkaline water. Alternatively, the sterilizing water supply unit is not limited to the electrolytic cell. That is, the sterilizing water may be sterilizing water generated by dissolving a sterilizing agent and a sterilizing liquid in water. Among these, the solution containing hypochlorous acid has stronger sterilizing power.

FIG. 6 is a timing chart showing a specific example of the operation of the sanitary washing device and the state of the flow path according to the present embodiment.
Note that the state of the flow channel shown in FIG. 6 represents the state inside the first flow channel 21 on the downstream side of the electrolytic cell unit 450.

  First, when a human body detection unit such as the room entry detection sensor 402 or the human body detection sensor 403 detects a human body, the control unit 405 executes control to open the electromagnetic valve 431 (timing t101). Further, the control unit 405 controls the flow path switching valve (flow control / flow path switching valve 471 and the three-way valve 420) to guide clean water to the second flow path 23 (timing t101 to t102). Thereby, clean water is sprayed from the spray nozzle 480. That is, at this time, the control unit 405 does not energize the electrolytic cell unit 450 and does not generate sterilizing water. Thus, a water film can be formed on the surface of the bowl 801 before the user performs a stool act. Therefore, it is possible to prevent stool or the like from adhering to the surface of the bowl 801 and becoming difficult to flow.

  When spraying clean water from the spray nozzle 480 for a predetermined time (for example, about 5 seconds), the control unit 405 starts energization of the electrolytic cell unit 450 and generates sterilizing water in the electrolytic cell unit 450 (timing t102). . Furthermore, the control unit 405 guides the sterilizing water to the second channel 23 and stores the sterilizing water in the second channel 23 (timing t102 to t103). That is, in the latter half of the so-called premist operation before the user performs the stool action, the control unit 405 causes the sterilizing water to be input and causes the second flow path 23 to store the sterilizing water. At this time, it is desirable that the flow rate of clean water flowing into the electrolytic cell unit 450 is smaller than the flow rate of clean water flowing into the electrolytic cell unit 450 when the cleaning nozzle 473 described later is sterilized. According to this, sterilized water having a higher concentration can be generated, and the surface of the bowl 801 of the toilet bowl 800 having a wider area to be sterilized than the cleaning nozzle 473 can be sterilized effectively.

  The timing at which the control unit 405 ends the operation of guiding the sterilizing water to the second flow path 23 is, for example, that undiluted sterilizing water is sprayed from the spray nozzle 480, and the clean water inside the second flow path 23 is This is the timing for replacement with sterilized water. In other words, the timing at which the control unit 405 terminates the operation of leading the sterilizing water to the second flow path 23 is, for example, after a portion of the sterilizing water is sprayed from the spray nozzle 480 after clean water is sprayed from the spray nozzle 480. This is the timing when time passes for a while. This timing can be set by, for example, the internal volume of the second flow path 23, the flow rate when the sterilizing water is guided to the second flow path 23, or the like. The time for which the control unit 405 guides the sterilizing water to the second flow path 23 is, for example, about 5 seconds. Subsequently, the control unit 405 executes control for closing the electromagnetic valve 431 and ends the premist operation.

  Subsequently, when the seating detection sensor 404 detects a user seated on the toilet seat 200, the control unit 405 performs control to open the electromagnetic valve 431 (timing t103). Furthermore, the control unit 405 controls the flow path switching valve to supply clean water to the first flow path 21 (timing t103). At this time, the control unit 405 does not energize the electrolytic cell unit 450 and does not generate sterilizing water. At this time, the sanitary washing device 100 operates the heat exchanger unit 440. Therefore, the water in the first flow path 21 is discharged to the bowl 801 of the toilet bowl 800 and replaced with warm water heated by the heat exchanger unit 440. That is, the control unit 405 operates the heat exchanger unit 440 to execute warm water preparation for discharging water from the water outlet 474 (timing t103 to t104). In addition, the execution time of warm water preparation is about 6 to 15 seconds, for example. Further, in the present specification, the term “clean water” includes not only cold water but also heated hot water.

And sanitary washing apparatus 100 waits for a while as it is (timing t104-t105).
Subsequently, when a user presses a sterilization switch (not shown) before washing the body while seated on the toilet seat 200, the control unit 405 starts energization of the electrolytic cell unit 450, and the electrolytic cell unit 450 starts sterilizing water. (Timing t105). Thereby, the 1st flow path 21 downstream from the electrolytic cell unit 450, the part of the water discharge port 474 of the washing nozzle 473, an outer peripheral surface, etc. are sterilized with sterilizing water.

  Subsequently, when the sterilizing water is passed through the first flow path 21 for a predetermined time (for example, about 3.5 seconds), the control unit 405 stops energization of the electrolytic cell unit 450 (timing t106). Furthermore, the control unit 405 guides clean water to the first flow path 21 (timing t106). Thereby, the sterilization inside the first flow path 21 is replaced with clean water. The time for which the control unit 405 guides the clean water to the first flow path 21 is, for example, about 3.5 seconds.

  Subsequently, the control unit 405 executes control to close the electromagnetic valve 431 (timing t107). And sanitary washing apparatus 100 waits for a while as it is. (Timing t107 to t108). Note that the standby time at this time (the time between timings t107 and t108) varies depending on, for example, the time of the user's stool activity.

  Subsequently, when the user presses a “wet washing switch” (not shown) (timing t108), the control unit 405 receives a signal for executing body washing. Then, the control unit 405 first causes “pre-cleaning” to be performed with clean water (timing t108 to t109). More specifically, the control unit 405 controls the flow path switching valve to discharge clean water from all of the plurality of water discharge ports 474 and to wash the water discharge ports 474. At this time, the control unit 405 does not energize the electrolytic cell unit 450 and does not generate sterilizing water. Therefore, the portions of the plurality of water outlets 474 are physically cleaned by the water discharged by the water outlet 474 itself (including the water reflected by the inner wall of the nozzle cleaning chamber 478). The execution time of the pre-cleaning is about 2 to 7 seconds, for example.

  Subsequently, the control unit 405 causes the cleaning nozzle 473 to advance into the bowl 801 while jetting clean water from a water discharge unit (not shown) provided in the nozzle cleaning chamber 478 by controlling the flow path switching valve. Therefore, the body of the cleaning nozzle 473 is cleaned with clean water sprayed from the water discharge portion of the nozzle cleaning chamber 478 (timing t109 to t110). Also at this time, the control unit 405 does not energize the electrolytic cell unit 450 and does not generate sterilizing water. Therefore, the body of the cleaning nozzle 473 is physically cleaned with clean water sprayed from the water discharge portion of the nozzle cleaning chamber 478. The advance time of the cleaning nozzle 473 is, for example, about 3 seconds.

  Subsequently, the control unit 405 controls the flow path switching valve to inject clean water from the spout 474 for “wet washing” to wash the “butt” of the user seated on the toilet seat 200 (timing t110). ~ T111). At this time, the control unit 405 does not energize the electrolytic cell unit 450 and does not generate sterilizing water. Therefore, sterilizing water is not sprayed on the user's body. Moreover, since the heat exchanger unit 440 is operating, the user's body is washed with warm water heated by the heat exchanger unit 440.

  Subsequently, when the user presses a “stop switch” (not shown) (timing t111), the control unit 405 executes pressure relief control. Then, the control unit 405 controls the flow path switching valve to store the cleaning nozzle 473 in the casing 400 while ejecting clean water from the water discharge unit of the nozzle cleaning chamber 478 (timing t111 to t112). That is, the control unit 405 physically cleans the body of the cleaning nozzle 473 with the clean water sprayed from the water discharge unit of the nozzle cleaning chamber 478 as in the case where the cleaning nozzle 473 advances. The storage time of the cleaning nozzle 473 is about 3 seconds, for example.

  Subsequently, in a state where the cleaning nozzle 473 is housed in the casing 400, the control unit 405 controls the flow path switching valve to discharge clean water from all the plurality of water discharge ports 474, and the water discharge ports 474. The “post-cleaning” is executed (timing t112 to t113). At this time, the control unit 405 does not energize the electrolytic cell unit 450 and does not generate sterilizing water. Therefore, the portions of the plurality of water outlets 474 are physically cleaned by the water discharged by the water outlet 474 itself (including the water reflected by the inner wall of the nozzle cleaning chamber 478). The post-cleaning execution time is, for example, about 3 seconds.

Subsequently, the control unit 405 executes control to close the electromagnetic valve 431 (timing t113). And sanitary washing apparatus 100 waits for a while as it is. (Timing t113 to t114).
Subsequently, when a predetermined time (here, for example, about 25 seconds) elapses after the seating detection sensor 404 or the like no longer detects the user seated on the toilet seat 200, the control unit 405 energizes the electrolytic cell unit 450. And sterilizing water is generated in the electrolytic cell unit 450 (timing t114).

  Furthermore, the control unit 405 executes control to open the electromagnetic valve 431, and supplies sterilizing water to the first flow path 21 on the downstream side of the electrolytic cell unit 450 (timing t114). Thereby, the first flow path 21 on the downstream side of the electrolytic cell unit 450 is sterilized with sterilizing water. Further, the control unit 405 controls the flow path switching valve to discharge the sterilizing water from all of the plurality of water outlets 474 and to perform “pre-sterilization” of these water outlets 474 (timing t114 to t115). . Therefore, the portions of the plurality of water outlets 474 are sterilized by the sterilizing water (including the sterilizing water reflected by the inner wall of the nozzle cleaning chamber 478) discharged by the water outlet 474 itself. The execution time of the pre-sterilization is about 3 seconds, for example.

  Subsequently, the control unit 405 controls the flow path switching valve to spray the sterilizing water from the water discharge unit of the nozzle cleaning chamber 478 while allowing the cleaning nozzle 473 to advance into the bowl 801 and then store it in the casing 400. (Timing t115 to t116). That is, the control unit 405 causes the body cleaning of the cleaning nozzle 473 to be performed by the sterilizing water sprayed from the water discharge unit of the nozzle cleaning chamber 478 (timing t115 to t116). As a result, the inside of the first flow path 21 on the downstream side of the electrolytic cell unit 450 and the body of the cleaning nozzle 473 are sterilized with sterilizing water. Note that the execution time of the body cleaning with the sterilizing water is, for example, about 6 seconds.

  Subsequently, in a state where the cleaning nozzle 473 is housed in the casing 400, the control unit 405 controls the flow path switching valve to discharge the sterilizing water from all of the plurality of water discharge ports 474, and the water discharge ports 474. The “post sterilization” is executed (timing t116 to t117). Therefore, the portions of the plurality of water outlets 474 are sterilized by the sterilizing water (including the sterilizing water reflected by the inner wall of the nozzle cleaning chamber 478) discharged by the water outlet 474 itself. In addition, the execution time of post sterilization is about 3 seconds, for example.

Subsequently, the control unit 405 executes control to close the electromagnetic valve 431 (timing t117). And sanitary washing apparatus 100 waits for a while as it is. (Timing t117 to t118).
Subsequently, when a predetermined time (here, for example, about 90 seconds) elapses after the human body detection unit such as the room entry detection sensor 402 or the human body detection sensor 403 no longer detects the human body, the control unit 405 And sterilizing water is sprayed from the spray nozzle 480 (timing t118 to t119: after sterilization operation). At this time, the sterilized water stored in the operation at timings t102 to t103 is present inside the second flow path 23. Therefore, the control unit 405 can spray the sterilized water stored in advance in the second flow path 23 from the spray nozzle 480. That is, the sterilized water stored in advance in the second flow path 23 is used as the sterilized water sprayed from the spray nozzle 480 by the control unit 405.

  At this time, the controller 405 does not have to generate sterilizing water in the electrolytic cell unit 450. In the operation at timings t118 to t119, the control unit 405 can guide and spray the clean water previously stored in the second flow path 23 from the spray nozzle 480 by guiding clean water to the second flow path 23. it can.

  Thereby, the control part 405 can spray the sterilized water with which the production | generation density | concentration was stabilized from the spraying initial stage. Therefore, the surface of the bowl 801 of the toilet bowl 800 can be sterilized more efficiently. Moreover, since the density | concentration of sterilization water is ensured from the spraying initial stage, the surface of the bowl 801 of the toilet bowl 800 can be sterilized in a shorter time.

  Subsequently, when a predetermined time (in this case, for example, about 8 hours) has elapsed since the sterilizing water was added, the control unit 405 is downstream of the electrolytic cell unit 450 in the same manner as the operation described above with respect to the timings t114 to t115. The first flow path 21 is sterilized with sterilizing water. In addition, the control unit 405 controls the flow path switching valve to discharge the sterilizing water from all of the plurality of water discharge ports 474, and causes the water discharge ports 474 to be sterilized (timing t119 to t120).

  According to this specific example, when the human body detection unit such as the room entry detection sensor 402 or the human body detection sensor 403 detects the human body, the control unit 405 guides the sterilizing water to the second flow path 23, and the second flow path 23. To store sterilized water. Therefore, in the so-called premist operation before the user performs the stool action, the control unit 405 can store the sterilizing water in the second flow path 23 in advance. Thereby, the control unit 405 can spray sterilizing water from the spray nozzle 480 before and after “wet cleaning”.

Moreover, when the temperature of the water electrolyzed in the electrolytic cell unit 450 rises, scales such as calcium carbonate (CaCO ₃ ) are easily generated. On the other hand, in this specific example, the control unit 405 stores the sterilizing water in the second flow path 23 before executing the warm water preparation (timing t103 to t104) (timing t102 to t103). That is, the control unit 405 generates sterilizing water in the electrolytic cell unit 450 using unheated cold water, and stores the sterilizing water in the second flow path 23. Therefore, it can suppress that a scale is produced | generated in the electrolytic cell unit 450. FIG.

  In addition, the control unit 405 causes sterilizing water to be introduced in the second half of the premist operation, and stores the sterilizing water in the second flow path 23. Therefore, the operation in which the control unit 405 stores the sterilized water is performed continuously with the premist operation. Thereby, the control part 405 can store sterilization water in the 2nd flow path 23, without giving discomfort to a user. Further, the sterilizing water is generated by electrolysis in the electrolytic cell unit 450. Therefore, for example, work such as periodically replenishing a bactericide can be omitted. Thereby, the maintenance work for supplying sterilizing water, etc. can be reduced.

  As described above, according to the present embodiment, the control unit 405 controls the electrolytic cell unit 450 and the flow path switching valve (the flow control / flow path switching valve 471 and the three-way valve 420). The produced sterilized water is stored in the second flow path 23. Then, the controller 405 causes the spray nozzle 480 to spray sterilized water stored in advance in the second flow path 23. Thereby, the control part 405 can spray the sterilized water with which the production | generation density | concentration was stabilized from the spraying initial stage. Therefore, the surface of the bowl 801 of the toilet bowl 800 can be sterilized more efficiently. Moreover, since the density | concentration of sterilization water is ensured from the spraying initial stage, the surface of the bowl 801 of the toilet bowl 800 can be sterilized in a shorter time.

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, etc. of each element provided in the sanitary washing device 100 and the like and the installation form of the spray nozzle 480 and the washing nozzle 473 are not limited to those illustrated, and can be changed as appropriate. .
In the embodiment of the present invention, the case where the sterilizing water is a liquid containing hypochlorous acid has been described as an example, but the sterilizing water is not limited to this. The sterilizing water generated in the electrolytic cell unit 450 may be a liquid containing metal ions such as silver ions and copper ions. Alternatively, the sterilizing water generated in the electrolytic cell unit 450 may be a liquid containing electrolytic chlorine, ozone, or the like. Alternatively, the sterilizing water generated in the electrolytic cell unit 450 may be acidic water or alkaline water. Alternatively, the sterilizing water supply unit is not limited to the electrolytic cell. That is, the sterilizing water may be sterilizing water generated by dissolving a sterilizing agent and a sterilizing liquid in water.
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.

  21 first flow path, 23 second flow path, 25 third flow path, 100 sanitary washing device, 200 toilet seat, 300 toilet lid, 400 casing, 402 entry detection sensor, 403 human body detection sensor, 404 seating detection sensor 405 control unit, 420 three-way valve, 431 solenoid valve, 440 heat exchanger unit, 450 electrolytic cell unit, 451 anode plate, 452 cathode plate, 460 pressure modulator, 471 flow control / flow path switching valve, 473 washing nozzle, 474 outlet, 478 nozzle cleaning chamber, 480 spray nozzle, 491 strainer, 493 vacuum breaker, 800 toilet bowl, 801 bowl

Claims (4)

A nozzle that has a water outlet, and jets water from the water outlet to wash the user's body;
A first flow path for guiding water supplied from a water supply source to the water outlet;
A sterilizing water supply unit provided in the middle of the first flow path and capable of generating sterilizing water;
A spraying section for spraying at least one of the water and the sterilizing water onto the surface of a bowl of a toilet;
A second channel that branches off from the first channel and guides the sterilizing water to the spray section;
A flow path switching valve capable of switching the supply destination of the sterilizing water to the first flow path and the second flow path;
When spraying the sterilizing water from the spraying unit, a control unit that executes control to spray the sterilizing water stored in advance in the second flow path;
A sanitary washing device characterized by comprising: It further includes a human body detection unit capable of detecting a human body,
When the control unit receives the human body detection signal from the human body detection unit, the control unit controls the sterilizing water supply unit and the flow path switching valve to store the sterilized water in the second flow path. The sanitary washing device according to claim 1.   The control unit controls the flow path switching valve to spray the water from the spray unit on the surface of the bowl before the toilet is used, and then controls the sterilizing water supply unit to control the second The sanitary washing device according to claim 1 or 2, wherein the sterilizing water is stored in a flow path.   The sanitary washing device according to any one of claims 1 to 3, wherein the sterilizing water is electrolyzed water.