ES2856499T3 - Sanitary cleaning device - Google Patents

Abstract

A sanitary wash device comprising: a plurality of jet ports (834, 836, 838) for expelling wash water; a nozzle portion (820) provided with a plurality of flow passages (835, 837, 839) communicating with the jet ports (834, 836, 838); a nozzle drive portion (860) configured to advance and retract the nozzle portion (820) between an accommodated position and a plurality of wash positions; a flow regulating valve (870) for selectively supplying wash water to the plurality of flow passages (835, 837, 839); a water pump (516) configured to supply wash water to the nozzle portion (820); a heat exchanger (700) arranged upstream of the water pump (516) and heating the wash water; an operation part (210); and a control portion (130), wherein the plurality of flow passages (835, 837, 839) include at least: one buttock wash water flow passage (835) communicating with a port (834 ) Buttock wash water jet; a bidet wash water flow passage (837) communicating with a bidet wash water jet port (836); and a nozzle cleaning flow passage (839) communicating with a nozzle cleaning water jet port (838), the control part (130) is configured, when the operation part (210) performs a washing operation that is buttock washing and bidet washing, to activate the water pump (516) and the heat exchanger (700) and, at the same time, to switch the steps (835, 837, 839) of flow mode that one of the butt wash water flow step (835) and the bidet wash water flow step (837) are selected by the flow regulating valve (870), and to supply hot water heated by the exchanger (700) heat to the selected flow step (835, 837) for a predetermined time, wherein the nozzle portion (820) is in an accommodated position; The control part (130) is configured, after the predetermined time, to switch the selection of the flow path by the flow regulating valve (870) to the nozzle cleaning flow path (839), and to actuate the part ( 860) nozzle drive to advance the nozzle portion (820) to one of a plurality of wash positions corresponding to the wash operation selected by the operating part (210) from the accommodated position while the pump (516) The water) and the heat exchanger (700) are continuously actuated, and the control part (130) is configured, at the point of time when the nozzle portion (820) reaches one of the plurality of wash positions, to switch the flow step to one of the buttock wash water flow step (835) and the bidet wash water flow step (837) corresponding to the washing operation selected by the operation part (210) using valve (870) reg flow ulator.

Description

DESCRIPTION

Sanitary cleaning device

Technical field

The present invention relates to the preheating of a washing nozzle in a sanitary washing device of an instantaneous heating process provided with a heat exchanger.

Background of the technique

Conventionally, with respect to such a sanitary washing device provided with a heat exchanger for instantaneously heating the washing water, the configuration is known where the preheating of a washing nozzle is carried out as described below (see literature 1 patent, for example).

That is, in the sanitary washing device described in patent literature 1, when performing a washing operation, firstly, in a state where the washing nozzle is housed in an accommodated position, a pump is operated supplying water wash and an exchanger that heats the wash water. Then a pre-wash is performed in which hot water is supplied to a flow passage of the wash nozzle and hot water is expelled from a jet port. In this way, cleaning and preheating of the wash nozzle is carried out. Then, after the prewash is finished, the drive of the pump and the heat exchanger is temporarily stopped. Then, in a state in which the jet of washing water is stopped, a nozzle drive motor is driven to project the washing nozzle to a washing position from an accommodated position.

Then, after the wash nozzle reaches the wash position, the pump and heat exchanger are operated again so that the wash water is expelled from the jet port. Consequently, an intimate part washing operation is started.

Next, a specific form of operation of the sanitary washing device described in patent literature 1 is described with reference to FIG. 36.

FIG. 36 is a view showing a time diagram of the respective constitutional elements of a conventional sanitary washing device.

First, as shown in FIG. 36, the prewash is performed from a time point t15 to a time point t17. That is, drive of the pump starts at time t15 and drive of the heat exchanger starts at time t16, which occurs a little after time t15. Then, at time t17, the drive of the pump and heat exchanger is stopped for the pre-wash to end. Then, for a period from a time point t18 to a time point t19, a nozzle drive motor is driven so that the wash nozzle projects to the wash position from the accommodated position.

Then, driving the pump starts at time t19, and driving the heat exchanger starts at time t20, which occurs slightly after time t19. Consequently, an intimate part washing operation is started.

However, in the sanitary washing device having the conventional configuration, the drive of the pump and the heat exchanger stops during the period where the washing nozzle projects from the end of the pre-wash to the start of the washing of the part. intimate. Accordingly, the temperature of the washing water stored in a flow passage of the washing nozzle or the like is lowered during that period.

Also, when the pump and the heat exchanger are operated again after the wash nozzle reaches the wash position, there is a time difference between the start of the pump drive and the start of the heat exchanger drive. Consequently, cold water that is not heated is supplied to the wash nozzle during this period. That is, the wash water that is expelled from the injection port immediately after the intimate part wash operation is started is not heated sufficiently, and therefore low-temperature hot water is expelled from the nozzle. washing. Accordingly, with the conventional sanitary washing device, there is still room for improvement from the point of view of convenience.

Patent literature

PTL 1: Japanese Unexamined Patent Publication No. 2008-275283

WO 2009/136772 A2 discloses a bidet flow system capable of feeding raw water at room temperature to a sterilizer. The bidet flow system comprises a flow path change valve that changes flow paths so that raw water flowing from a raw water supply unit flows through at least one of a plurality of flow paths. flow; a sterilizer coupled to an outlet side of the flow switch valve for generating nozzle cleaning water containing an antibacterial and / or disinfectant substance from the raw water fed; a heating member coupled to the outlet side of the flow switch valve for heating the raw water fed; and a nozzle unit coupled to the sterilizer and the heating member, the nozzle unit having at least one nozzle installed therein for feeding nozzle cleaning water or hot water. The bidet flow system can be helpful in improving the efficiency of using hot and cold water as raw water of suitable temperature can be fed to the components of a bidet by placing a flow path change valve on the front end of a heating member.

Summary of the invention

The present invention provides a comfortable to use sanitary wash device that can expel wash water at a predetermined temperature immediately after commencing intimate wash.

That is, a sanitary wash device of the present invention includes: a plurality of jet holes for expelling wash water; a nozzle portion provided with a plurality of flow passages communicating with the jet ports; a nozzle drive portion that is configured to advance and retract the nozzle portion between an accommodated position and a plurality of wash positions; a flow regulating valve for selectively supplying wash water to the plurality of flow passages; a water pump that is configured to supply wash water to the nozzle portion; a heat exchanger arranged upstream of the water pump and heating the wash water; an operational part; and a control part. The plurality of flow passages includes at least; a buttock wash water flow passage communicating with a butt wash water jet port; a bidet wash water flow passage communicating with a bidet wash water jet port; and a nozzle cleaning flow passage that communicates with a nozzle cleaning water jet port. The control part is configured, when a washing operation that is buttock washing and bidet washing is performed by the operating part, to operate the water pump and the heat exchanger and, at the same time, change the steps of flow so that one of the butt wash water flow path and the bidet wash water flow path are selected by the flow regulating valve, and the control part is configured to supply hot water heated by the exchanger of heat to the selected flow path for a predetermined time. The control part is configured, after the predetermined time elapses, to change the selection of the flow path by the flow regulating valve to the cleaning flow path of the nozzle, and to actuate the drive part of the nozzle to advancing the nozzle portion to one of the plurality of wash positions from the accommodated position. The control portion is configured, at a point in time when the nozzle portion reaches one of the plurality of wash positions, to change the flow path to one of the butt wash water flow path and the bidet wash water flow passage corresponding to a wash operation selected by the operating part by means of the flow regulating valve.

With such a configuration, firstly, when the washing operation is performed, the drive of the water pump and the heat exchanger is started in a state that the nozzle portion is in an accommodated position. Then, during a period where the nozzle portion advances to the washing position and an intimate part washing operation is performed, the water pump and heat exchanger are operated continuously. Accordingly, it is possible to suppress the lowering of the temperature of the nozzle portion and the temperature of the washing water in the course of movement of the nozzle portion. Simultaneously, the washing water that is heated in the heat exchanger immediately after the supply of electricity to the heat exchanger and having an unstable discharge temperature is prevented from being intentionally expelled into a human body, and the washing water is discharged as wash water to wash the nozzle portion. Accordingly, in the wash position, the wash water ejected from the butt wash water jet port or the bidet wash water jet port can be ejected with a stable hot water temperature from the start of the jet. in a state that the washing water is sufficiently hot. As a result, it is possible to realize a sanitary washing device capable of comfortable washing.

Brief description of the drawings

FIG. 1 is a perspective view showing a state where a sanitary washing device according to an exemplary embodiment of the present invention is installed in a toilet bowl.

FIG. 2 is a perspective view showing a state where a front body shell is removed from a body of the sanitary washing device.

FIG. 3 is a perspective view showing a state where the front body shell from the body and a control part are removed.

FIG. 4 is a perspective view showing an upper surface of an operating part of the sanitary washing device.

FIG. 5 is a perspective view showing an external appearance of a remote control.

FIG. 6 is a schematic view showing a configuration of a water circuit of a washing part of the sanitary washing device.

FIG. 7 is a perspective view showing a disassembled state of the water circuit of the sanitary washing device.

FIG. 8 is a perspective view showing an assembled state of the water circuit of the sanitary washing device.

FIG. 9 is a perspective view showing an external appearance of a subtank.

FIG. 10 is a sectional view of the subtank in a transverse direction.

FIG. 11 is a cross-sectional view of the subtank in a longitudinal direction.

FIG. 12 is a graph showing a change in the output voltage of an upper electrode, a change in the output voltage of a common electrode, and a threshold value.

FIG. 13 is a graph showing a lower electrode output voltage change, common electrode output voltage change, and a threshold value.

FIG. 14 is a perspective view showing an external appearance of a heat exchanger.

FIG. 15 is a cross-sectional view of the heat exchanger.

FIG. 16 is a perspective view showing an external appearance of a water pump.

FIG. 17 is a sectional view of the water pump.

FIG. 18 is a perspective view showing an external appearance of a storage state of a nozzle device

FIG. 19 is a cross-sectional view taken along line 19-19 in FIG. 18.

FIG. 20 is a longitudinal cross-sectional view showing a storage state of the nozzle device.

FIG. 21 is a cross-sectional view showing a detailed configuration of a portion B shown in FIG.

twenty.

FIG. 22 is a cross-sectional view taken along line 22-22 in FIG. twenty-one.

FIG. 23 is a cross-sectional view showing a storage state of the nozzle device.

FIG. 24 is a cross-sectional view showing a detailed configuration of a portion C shown in FIG.

2. 3.

FIG. 25 is a longitudinal cross-sectional view showing a buttock wash condition of the mouthpiece device.

FIG. 26 is a cross-sectional view showing a detailed configuration of a portion D shown in FIG.

25.

FIG. 27 is a longitudinal cross-sectional view showing a bidet flushing state of the nozzle device.

FIG. 28 is a cross-sectional view showing a detailed configuration of a portion E shown in FIG.

27.

FIG. 29 is a cross-sectional view showing a bidet flushing state of the nozzle device. FIG. 30 is a cross-sectional view showing a detailed configuration of a portion G shown in FIG.

29.

FIG. 31 is a plan view of a fixed disk of a flow regulating valve.

FIG. 32 is a plan view of a movable disk of the flow regulating valve.

FIG. 33 is a schematic view showing relative positions between the fixed disc and the movable disc in the respective operating states of the flow regulating valve.

FIG. 34 is a timing chart of the washing part in an initial stage of use of the sanitary washing device.

FIG. 35 is a timing chart of the washing part in a typical stage of use of the sanitary washing device.

FIG. 36 is a view showing time charts of the respective constitutional elements of a conventional sanitary washing device.

Description of achievements

Exemplary embodiments of the present invention are described below with reference to the drawings. However, the present invention is not limited by these exemplary embodiments.

First exemplary realization

<1> General configuration of the sanitary washing device

Next, the general configuration of the sanitary washing device according to the first exemplary embodiment is described with reference to FIG. 1 to FIG. 5.

FIG. 1 is a perspective view showing a state where the sanitary washing device according to the first exemplary embodiment is installed in a toilet bowl. FIG. 2 is a perspective view showing a state where a front body casing is removed from a sanitary washing device body. FIG. 3 is a perspective view showing a state where the front body shell from the body and a control part of the sanitary washing device are removed. FIG. 4 is a perspective view showing an upper surface of an operating part of the sanitary washing device. FIG. 5 is a perspective view showing an external appearance of a remote control.

As shown in FIG. 1, the sanitary flushing device 100 of this exemplary embodiment includes, as main constitutional elements thereof, at least the body 200, the toilet seat 300, the toilet lid 320, the remote control 400, the detection sensor 450 human body and the like. The body 200, the toilet seat 300, and the toilet lid 320 are formed as an integral body and are mounted on a toilet bowl top surface 110.

Next, the arrangement of the respective constitutional elements is described assuming one side of the sanitary flushing device 100 where the body 200 is arranged as a rear side, one side of the sanitary flushing device 100 where the toilet seat 300 is arranged as a front side, a right side when a user looks forward as a right side and a left side when the user looks forward as a left side.

The operative part 210 is integrally mounted on the body 200 in a state where the operative part 210 protrudes towards one side of the body 200. The toilet seat and toilet lid rotatable mechanism 360 are disposed on one side of the front portion of the body 200 and actuate the toilet seat 300 and toilet lid 320 so that they can be opened and closed. The toilet seat and toilet lid rotary mechanism 360 include a DC motor and a plurality of gears, for example, and can open or close the toilet seat 300 and the toilet lid 320 independently or simultaneously.

As shown in FIG. 1, when the toilet lid 320 is opened, the toilet lid 320 is lifted so as to be positioned at the rearmost portion of the sanitary flushing device 100. On the other hand, when the toilet lid 320 is closed, the toilet lid 320 hides an upper surface of the toilet seat 300.

The toilet lid 320 is molded using a resin material such as PP (polypropylene) and ABS, for example. The toilet seat 320 has the thermal insulation structure formed by the double structure and a thermal insulation material.

A toilet seat heater (not shown in the drawing) that heats a seating surface is incorporated in the toilet seat 300. The toilet seat heater heats the surface of the seat of the toilet seat 300 in such a way that the surface of the seat is converted to a user-friendly temperature.

Furthermore, a seat sensor (not shown in the drawing) is mounted on a bearing portion disposed within the body 200 that supports a rotary axis of the toilet seat 300, and detects a human body sitting on the toilet seat 300. The seat sensor is formed by a weight-type sensor, for example, and opens and closes a switch in response to a change in weight caused by a user's seating on the toilet seat 300. Due to such an operation, the seat sensor detects that a user is sitting on the seat surface of the toilet seat 300.

As shown in FIG. 2 and FIG. 3, inside the body 200, it incorporates subtank 600, heat exchanger 700, washing part 500 including nozzle device 800 to wash an intimate part of the human body, deodorizing device 120 to deodorize the smell generated at the time defecation, the control part 130 for controlling various functions of the sanitary flushing device 100 and the like. The detailed configuration of the washing portion 500 is described later.

The nozzle device 800, which is a main constituent element of the washing part 500, is arranged in a central portion inside the body 200, and the deodorizing device 120 is arranged on a left side of the nozzle device 800. Furthermore, the toilet seat and toilet lid rotatable mechanism 360 which operates the toilet seat 300 and the toilet lid 320 in an openable and closable manner are disposed on a left side portion of the nozzle device 800.

The electromagnetic water stop valve 514 of the washing part 500, the subtank 600 and the like are arranged on a front right side of the nozzle device 800. The heat exchanger 700 is arranged on the rear side of the nozzle device 800. The water pump 516 is arranged behind the heat exchanger 700. The control part 130 is arranged above the wash part 500.

As shown in FIG. 4, a plurality of switches and display lamps 240 are provided to operate and configure the respective functions of the sanitary flushing device 100 on the operating portion 210. An operation board (not shown in the drawing) is disposed within the operating portion 210. A plurality of touch switches and a plurality of LEDs are arranged on the operation plate. With such a configuration, a user can operate the touch switches by pressing and can visually recognize the LEDs by means of a switch nameplate adhered to a top surface of the operating portion 210.

The operating portion 210 includes the infrared receiver 211. The infrared receiver 211 is disposed on a rear side of an upper surface of the operating portion 210. Infrared receiver 211 receives infrared signals transmitted from remote control 400 and human body detection sensor 450 shown in FIG. 1.

The switches of the operating part 210 are constituted by a plurality of operation switches 220 for operating a washing operation, a plurality of setting switches 230 for setting various kinds of functions, and the like. In addition, the display lamps 240 are comprised of a plurality of LEDs to display the set states.

The operation switches 220 of the operational part 210 are constituted by the butt wash switch 221 which is used auxiliary when the battery runs out or a fault occurs in the remote control 400; and the nozzle cleaning switch 222 that is actuated at the time of cleaning a nozzle.

The setting switches 230 of the operating part 210 are constituted, for example, by: hot water temperature switch 231; toilet seat temperature switch 232; 8 hour heating stop switch 233; power saving switch 234; switch 235 for automatic opening / closing of toilet lid and the like. The respective switches perform the following operation in response to the pushing operations. That is, the hot water temperature switch 231 is provided to adjust the temperature of the wash water. The toilet seat temperature switch 232 is provided to set a toilet seat temperature 300. When the 8-hour heating stop switch 233 is turned on, the heating of the toilet seat 300 stops and the heating of the toilet seat 300 starts again after 8 hours have elapsed. The energy saving switch 234 automatically learns a period of time where the sanitary flushing device 100 is not used, and decreases a heating temperature of the toilet seat 300 during the time period where the sanitary flushing device 100 is not used. , thus achieving energy savings. The automatic toilet lid open / close switch 235 is provided to set the automatic open / close operation of the toilet seat 300 and the lid 320 of lavatory.

Many operations of the sanitary washing device 100 are performed by the remote control 400 which is constituted as a constitutional element separate from the body 200. Consequently, the remote control 400 is mounted on the surface of a wall or the like of a bathroom that a user sitting on the toilet seat 300 can easily operate.

As shown in FIG. 5, the general shape of the remote control 400 has a slim rectangular parallelepiped shape. The remote control 400 is configured such that the plurality of switches and indicator lamps are mounted on a top surface and a front surface of the box-shaped remote control body 401 that is molded using a resin material such as PP and ABS, for instance. The transmitting part 402 that transmits an operation signal from the remote control 400 to the body 200 in the form of infrared rays is arranged in the vicinity of an upper corner portion of the remote control body 401.

A printed circuit board (not shown in the drawing) that forms a functional control part of the remote control 400, a battery (not shown in the drawing) that is a power source for the remote control 400, and the like are incorporated in the inside of remote control body 401.

The buttock wash switch 410, the bidet wash switch 411, the stop switch 412, the motion wash switch 413, the rhythm wash switch 414, and the like are arranged in a central front portion of the body 401 of remote control, for example. The following operations are performed when the respective switches are operated by pressing. When the buttwash switch 410 is actuated, the buttwash starts. When the bidet wash switch 411 is actuated, the bidet wash is started to wash the intimate part of a woman. When the stop switch 412 is actuated, the buttock or bidet washing stops. When the motion wash switch 413 is actuated, washing in a wide range is made possible by advancing and retracting the wash position of a nozzle periodically at the time of performing the buttock wash or bidet wash. When the rhythm washing switch 414 is operated, washing becomes possible when the washing force of the washing water is periodically changed at the time of performing the buttock washing.

The wash power switch 415, the wash position switch 416, the sterilization switch 417 for nozzles, and the like are disposed on an upper front portion of the remote control body 401, for example. When the wash power switch 415 is actuated, a wash force at the time of buttock wash and a wash force at the time of bidet wash can be adjusted by two switches. When the wash position switch 416 is actuated, a wash position at the time of buttock wash and a wash position at the time of bidet wash can be set by two switches. When the sterilization switch 417 for nozzles is actuated, the nozzle is sterilized by washing it with hot water at 40 ° C for about 1 minute, for example.

Disposed above the wash power switch 415 is the LED-formed force display lamp 421 showing a five-stage wash force. In addition, the position display lamp 422 showing a five-stage wash position is disposed above the wash position switch 416.

The toilet lid switch 418 for electrically opening and closing the toilet lid 320, and the toilet seat switch 419 for electrically opening and closing the toilet seat 300 are arranged on an upper surface of the remote control body 401. By operating the respective switches, a user can arbitrarily open and close the toilet seat 300 and the toilet lid 320.

The human body detection sensor 450 shown in FIG. 1 is constituted as a constitutional element separate from the body 200, and is mounted on the surface of the bathroom wall or the like, for example. The human body detection sensor 450 includes: a pyroelectric sensor; a sensor control part; an infrared ray transmitting part; a battery that is a power source for the human body detection sensor 450 and the like not shown in the drawings. The pyroelectric sensor receives infrared rays emitted by a human body. The sensor control part detects the presence of a human body in response to a signal from the pyroelectric sensor. The infrared ray transmitting part transmits a human body detection signal from the sensor control part to the body control part 200 in the form of infrared rays.

The sanitary washing device according to this exemplary embodiment is configured as described above.

<2> Setting the washing part

Next, the configuration of the washing part of the sanitary washing device according to this exemplary embodiment is described with reference to FIG. 6 to FIG. 8.

FIG. 6 is a schematic view showing a configuration of a water circuit of the washing part of the sanitary washing device. FIG. 7 is a perspective view showing a disassembled state of the circuit of water from the sanitary flushing device. FIG. 8 is a perspective view showing an assembled state of the water circuit of the sanitary washing device.

The wash portion 500 shown in FIG. 6 is built into the body 200 and washes an intimate part of a user.

As shown in FIG. 6, the washing part 500 includes at least: washing water jet nozzle device 800; a series of wash water supply passage 900 through which wash water is supplied to the nozzle device 800 from the water supply connection port 510 and the like.

Water supply connection port 510, filter 511, check valve 512, constant flow regulator valve 513, electromagnetic water stop valve 514, release valve 515, subtank 600, exchanger 700 heat, buffer tank 750, water pump 516, flow regulating valve 870 are mounted sequentially in the wash water supply passage 900. A downstream end of the wash water supply passage 900 is connected to the nozzle device 800.

The water supply connection port 510 is arranged under a right side of the body 200 and is connected with a city water pipe. Strainer 511 is disposed within water supply connection port 510 and prevents ingress of dust contained in tap water. Check valve 512 prevents backflow of water stored in subtank 600 into city water pipeline Constant flow regulating valve 513 maintains a quantity of wash water flowing in wash water supply passage 900 to a fixed value. The electromagnetic water stop valve 514 electrically opens and closes the wash water supply passage 900. The constant flow regulating valve 513, the electromagnetic water stop valve 514, and the release valve 515 form an integral body as shown in FIG. 7.

Subtank 600 is disposed downstream of electromagnetic water stop valve 514 and has a port 603 open to atmosphere. The heat exchanger 700 heats the wash water instantly. The intermediate tank 750 makes a temperature of the hot water that is heated by the heat exchanger 700 uniform.

The water pump 516 is connected to a downstream side of the buffer tank 750. The nozzle device 800 is connected to the water pump 516 through the flow regulating valve 870. In addition, the buttock washing part 831, the bidet washing part 832, the nozzle cleaning part 833 and the like of the nozzle device 800 are connected to the respective ports of the flow regulating valve 870.

As shown in FIG. 7 and FIG. 8, outside the members constituting the flushing part 500, the water supply connection port 510, the filter 511, the check valve 512, the constant flow regulating valve 513, the electromagnetic stop valve 514 are assembled of water, release valve 515, subtank 600, heat exchanger 700, buffer tank 750, water pump 516 in chassis 501 which is molded using a resin material such as ABS, for example, and they constitute as an integral body. Furthermore, those members are mounted on the rear body casing 201 of the body 200 in a state where the members are mounted on the frame 501.

The filter 511 and the check valve 512 are integrally assembled in the water supply connection port 510, and the constant flow regulator valve 513 and the release valve 515 are integrally assembled in the electromagnetic water stop valve 514. Buffer tank 750 is integrally formed with heat exchanger 700.

The connection ports of the water supply connection port 510 and the water stop electromagnetic valve 514, the connection ports of the water electromagnetic valve 514 and the sub-tank 600, and the connection ports of the sub-tank 600 and the exchanger 700 heat pipes are respectively directly connected to each other with a gasket, for example, an O-ring sandwiched between them without interposing a connecting tube or the like between them. These members that constitute the water circuit are arranged and fixed to the chassis 501 in predetermined positions respectively.

By adopting the above-mentioned configuration in the water circuit, the tight structure is improved and, at the same time, the precision in the relative arrangement of the respective members can be improved. Particularly, the accuracy in the relative arrangement of the subtank 600 and the heat exchanger 700 is improved. Accordingly, the precision in controlling a flow rate of washing water is improved. As a result, the performance of the washing part 500 is improved and, at the same time, the precision in controlling the flow rate is improved.

Next, the configuration of the water pump 516 mentioned above is described with reference to FIG. 16 and FIG. 17 while also referring to Fig. 7.

FIG. 16 is a perspective view showing an external appearance of the water pump. FIG. 17 is a sectional view of the water pump.

As shown in FIG. 16 and FIG. 17, the water pump 516 is formed by a piston pump which is a positive displacement pump having an outer shape of approximately an L-shape (including an L-shape), for example. Specifically, the water pump 516 includes: the motor portion 516a having an approximately circular cylindrical shape (including a circular cylindrical shape); link mechanism part 516b that converts a rotary motion of the motor into a reciprocating motion; and the piston part 516c that is actuated by the reciprocating movement of the link mechanism part 516b. The water suction port 516d and the water discharge port 516e are formed on an outer surface of the piston portion 516c as connecting ports.

In the case of the water pump 516 of this exemplary embodiment, at the time of operating the water pump 516, the vibrations generated in the part 516a of the motor that performs only a rotary movement are less than the vibrations generated by the part 516b of the link mechanism and piston portion 516c performing reciprocating motion.

To specifically describe the operation of the water pump 516, first, when the engine part 516a is driven, the piston part 516c initiates a reciprocating motion. The wash water is drawn into the water pump 516 from the water suction port 516d of the piston portion 516c and the wash water is discharged from the water discharge port 516e. The wash water discharged from the water discharge port 516e is discharged while forming the water flow having the appropriate pulsation together with a reciprocating movement of the piston portion 516c.

The outer periphery of the motor part 516a having an approximately circular column shape (including the circular column shape) of the water pump 516 having the aforementioned configuration is surrounded by a damping member (not shown in the drawing) made of a foamed resin that has elasticity. By inserting the motor part 516a into the water pump mounting portion 501a having an approximately circular cylindrical shape (including the circular cylindrical shape) formed in a rear portion of the chassis 501, the motor part 516a rests on the portion. 501a water pump mounting. In such a configuration, the link mechanism part 516b and the piston part 516c are arranged suspended downward.

As shown in FIG. 7, the water pump mounting portion 501a is formed to have a thin wall thickness, and is formed in an upper portion of the rib-shaped leg portion 501b that rises from a lower surface of the chassis 501. It is That is, by forming the water pump mounting portion 501a with a thin wall thickness, it is possible to effectively absorb the vibrations of the water pump 516 due to the resilience of a resin from which the portion is formed. 501a water pump mounting.

The hot water outlet port 712 which is a connection port of the heat exchanger 700 with which the intermediate tank 750 is integrally formed and the water suction port 516d which is a connection port of the water pump 516 are connected to each other by a connecting tube made of a soft resin.

As described above, in the water pump 516 of this exemplary embodiment, the motor part 516a that generates a small amount of vibrations is mounted on the water pump mounting portion 501a having a thin wall thickness of the chassis 501 as the damping member. On the other hand, the joint mechanism part 516b and the piston part 516c that generate a large amount of vibrations are suspended freely. Furthermore, the piston part 516c and the like are connected to the intermediate tank 750 by means of a connecting tube 502 (see FIG. 8) made of a soft resin. With such a configuration, it is possible to prevent the vibrations generated at the time of operating the water pump 516 from being transmitted to the chassis 501, other members and the body 200. As a result, the comfort and durability of the sanitary washing device can be improved.

In particular, the water pump 516 is supported by means of two members made of different materials from each other, that is, the damping member made of foamed resin and the water pump mounting portion 501a made of a resin having resilience. Therefore, vibration frequencies can be absorbed in a wide range. Accordingly, it is possible to suppress the transmission of vibrations to the body 200 more effectively.

<3> Subtank configuration

Next, the subtank configuration of the sanitary flushing device of this exemplary embodiment is described with reference to FIG. 9 to FIG. eleven.

FIG. 9 is a perspective view showing an external appearance of the subtank. FIG. 10 is a cross-sectional view of the subtank. FIG. 11 is a longitudinal cross-sectional view of the subtank.

First, as shown in FIG. 9, the subtank 600 includes at least: the tank body 610 which is molded using a resin material such as ABS, for example; the water level detection sensor 620; the inlet water temperature sensor 630 and the like. The water level detection sensor 620 detects a level of wash water stored in the tank body 610. The inlet water temperature sensor 630 is formed by a thermistor, for example, and detects a temperature of the wash water supplied into the tank body 610.

The tank body 610 includes three members, that is, the front tank 611 that forms a front wall, side walls, a bottom surface and an upper surface of the tank, the rear tank 612 that forms a rear wall of the tank, and the portion 613 open to the atmosphere that is disposed on an upper surface of the tank body 610. The general shape of the tank body 610 is formed by a plurality of planes consisting of the front wall, the rear wall, the side walls, the bottom surface, and the top surface. As shown in FIG. 10, the general shape of the tank body 610, as viewed in plan view, has an approximately quadrangular shape (including a quadrangular shape). The front wall of the front tank 611 has a sloping portion that is sloping rearwardly from an intermediate portion of the front wall. That is, when the tank body 610 is viewed in a side view as shown in FIG. 11, the tank body 610 has an approximately trapezoidal shape (including a trapezoidal shape) where the width of an upper portion is less than the width of a lower portion. With such a configuration, the cross-sectional area of the upper portion of the tank body 610 is smaller than the cross-sectional area of the lower portion of the tank body 610.

The water inlet port 601 is formed in a lower portion of a side wall of the tank body 610, and the water outlet port 602 is formed in a lower portion of the rear wall of the tank body 610.

Furthermore, the open-to-atmosphere port 603, which causes the interior and exterior of the tank body 610 to communicate with each other, is formed in the open-to-atmosphere portion 613 that is disposed on the upper surface of the tank body 610. . The port 603 open to the atmosphere discharges the air accumulated in the tank body 610 to the outside to consistently maintain an internal pressure of the tank body 610 at atmospheric pressure. With such a configuration, the interior of the subtank 600 is constantly maintained at atmospheric pressure, and the wash water supply passage 900 from a downstream side of the subtank 600 to the water suction port 516d of the water pump 516 is also kept at atmospheric pressure. Consequently, the water pump 516 can suck water without being influenced by fluctuating water pressure. As a result, the water pump 516 can perform a pump function stably.

As shown in FIG. 10, in a flow passage communicating with the open to atmosphere port 603 of the open to atmosphere portion 613 in the water pump 516, the damper portion 613a is formed wherein the passage has a large cross section. In the case where the wash water is intended to pulse out along with bubbles from the port 603 open to the atmosphere or the like, the buffer portion 613a temporarily stores the wash water. Due to such an operation, the wash water flow from port 603 open to the atmosphere is suppressed.

The partition wall 614 is disposed within the tank body 610. The dividing wall 614 divides the interior of the tank body 610 into two tanks, that is, the water inlet tank 615 and the storage tank 616. The water inlet port 601 is formed on a side surface of the water inlet tank 615 in a vicinity of the lower surface of the water inlet tank 615, and the water outlet port 602 is formed on a rear wall of the storage tank 616 in the vicinity of the bottom surface of the storage tank 616.

That is, as the water inlet tank 615 and the storage tank 616 are formed by the dividing wall 614, when the air is contained in the wash water that flows into the tank body 610 through the inlet port 601 of water, the air passes through port 603 open to the atmosphere from an upper portion of the water inlet tank 615 and is discharged to the outside. Consequently, only wash water that does not contain air is allowed to flow to the storage tank 616.

Above the water inlet tank 615 of the tank body 610, the barrier wall 617 is provided interposing between the upper surface opening portion 615a of the water inlet tank 615 and the portion 613 open to the atmosphere at a state where the barrier wall 617 projects from the side wall of the tank body 610 in a substantially horizontal direction (including a horizontal direction). The barrier wall 617 is of a size capable of covering the entire surface of the upper surface opening portion 615a of the water inlet tank 615.

Inside the water inlet tank 615, a plurality of flow straightening ribs 618 are formed on the side wall of the tank body 610 and dividing wall 614 alternately protruding in the substantially horizontal direction (including a horizontal direction). .

Next, the flow of wash water in subtank 600 is described.

The wash water that flows into the subtank 600 from the water inlet port 601 first flows into a lower portion of the water inlet tank 615. Then, the wash water rises into the water inlet tank 615 while the flow direction of the wash water is changed by flow straightening ribs 618. At this stage of operation, when the pressure of the wash water flowing into subtank 600 from the water inlet port 601 is high, or when the wash water contains a large amount of air and the flow of wash water is notably turbulent, flow straightening ribs 618 adequately straighten the wash water flow. In addition, the flow straightening ribs 618 they separate the air contained in the wash water due to a vortex generated downstream of the flow straightening rib 618.

The wash water that rises in the water inlet tank 615 and from which the air is separated overflows an upper end of the partition wall 614, flows into the storage tank 616 and is stored in the storage tank 616. At this stage of operation, even when the pressure of the wash water flowing to the storage tank 616 from the water inlet port 601 is high, or even when the wash water contains a large amount of air, so the wash water flow is remarkably turbulent, the wash water flow in the upward direction is suppressed by the barrier wall 617. Consequently, the washing water reaches the portion 613 open to the atmosphere, and therefore, it is possible to prevent the washing water from flowing directly out of the subtank 600 from the port 603 open to the atmosphere.

As described above, during a period where the wash water flowing into the subtank 600 from the water inlet port 601 of the subtank 600 rises into the water inlet tank 615, the air contained in the wash water is separated. of the wash water due to flow straightening ribs 618 and the like. The separated air is discharged to the exterior of the tank body 610 from the port 603 open to the atmosphere. With such a configuration, airless wash water is stored in storage tank 616, and said wash water is supplied to heat exchanger 700 from subtank 600 water outlet port 602.

When air is contained in the wash water supplied to heat exchanger 700 from subtank 600, bubbles are generated in heat exchanger 700. Consequently, there may be a case where the temperature in the heat exchanger 700 increases abnormally so that the heat exchanger 700 is damaged. Therefore, the subtank 600 of this exemplary embodiment is provided with a partition wall 614 therein, thus preventing air mixing. With such a configuration, it is possible to effectively prevent the heat exchanger 700 from being damaged.

As shown in FIG. 10 and FIG. 11, the subtank 600 includes within it the water level detection sensor 620 which includes a common electrode 621 made of a stainless material and commonly used, and a plurality of water level electrodes 622 arranged corresponding to the respective levels of Water. In this ^{embodiment, an example is described where the water level detection} sensor 620 includes a common electrode 621 and two water level electrodes 622.

The common electrode 621 is disposed on an inner surface of a lower portion of the front wall of the tank body 610, and the water level electrodes 622 are disposed on an inner surface of the rear wall of the tank body 610. The water level electrodes 622 include the upper limit electrode 623 disposed on an upper portion of the interior surface of the rear wall and the lower limit electrode 624 disposed on a lower portion of the interior surface of the rear wall. On the other hand, the common electrode 621 is arranged over a position below the lower limit electrode 624 which constitutes one of the water level electrodes 622, and is always immersed in water in a state of normal use.

That is, by having common electrode 621 and upper limit electrode 623 and lower limit electrode 624 constituting water level electrodes 622 on surfaces different from each other, it is possible to suppress the occurrence of the case where residual water adhered to the inner surface of the tank body 610 is erroneously detected as stored water.

Detection of the water level of the washing water by water level electrodes 622 is performed as follows. First, a DC current is applied between the common electrode 621 and the water level electrodes 622. Then, whether the water level electrodes 622 are immersed in water or not, it is detected based on a voltage change. By such detection a water level of wash water is detected. That is, when the level of the wash water in the storage tank 616 rises, the lower limit electrode 624 and upper limit electrode 623 are immersed in the water. In this case, a voltage between common electrode 621 and lower limit electrode 624 and a voltage between common electrode 621 and upper limit electrode 623 are lowered. Consequently, the control portion 130 detects a level of wash water based on the decrease in voltages.

The upper limit electrode 623 that constitutes one of the water level electrodes 622 is used to detect an upper limit water level, and the lower limit electrode 624 that constitutes the other of the water level electrodes 622 is used to detect a lower limit water level. The upper limit electrode 623 is disposed in a position below the port 603 open to the atmosphere. With such a configuration, it is possible to prevent the wash water from exiting the open port 603 to the atmosphere. Furthermore, the lower limit electrode 624 is disposed over the water outlet port 602 through which water is supplied to the heat exchanger 700. With such a configuration, it is possible to prevent air from flowing into the heat exchanger 700.

The control portion 130 is configured to apply a DC current between the common electrode 621 and the water level electrodes 622 while periodically reversing a polarity of the DC current. The metals that make up the electrode are bypassed by oxidation and ionization of the metal due to an electrolysis action that is generated when a DC current is applied between the common electrode 621 and the water level electrodes 622 through water of washed. This reversal of polarity of the DC current is done to prevent such elusion of metals. That is, when a DC current is applied, it may be the case that the water level electrodes 622 deteriorate in a short period of time. In view of the above, deterioration of the water level electrodes 622 caused by electrolysis with a polarity of the DC current that is cyclically reversed is suppressed.

In this exemplary embodiment, a polarity reversal interval is set to a time corresponding to an AC power source that is supplied as a power source for the sanitary washing device. That is, the polarity reversal interval is set to 1/50 second when the AC power source to be supplied is 50 Hz, and the polarity reversal interval is set to 1/60 second when the power source AC power to be supplied is 60 Hz. With such a configuration, it is not necessary to add a new control circuit to reverse a polarity, thereby realizing miniaturization and cost reduction of the sanitary flush device.

As described above, in the sanitary flushing device 100 of this exemplary embodiment, the electromagnetic water stop valve 514 is opened so that flushing water is supplied to the subtank 600. Then, when an upper limit water level is detected by the water level electrode 622, the electromagnetic water stop valve 514 is closed to stop the water supply. Then the interior of the subtank 600 is filled with water.

When the normal washing operation is executed in a state where the subtank 600 is filled with water, a water level is lowered. When a lower limit water level is detected by the water level electrode 622, the electromagnetic water stop valve 514 opens again so that the wash water is supplied to the subtank 600. Due to such operation, the water supply Water is continued until the upper limit water level is detected by the water level electrode 622.

Typically, a maximum amount of wash water stored in subtank 600 is 100 cc. In view of the above, in this exemplary embodiment, an amount of water from the upper limit water level to the lower limit water level of the subtank 600 is set to 65 cc. However, this amount of water is merely an example, and it goes without saying that the amount of water is not limited to the example.

Normally, the flow rate of washing water used for washing is set to 450 cc / min when washing is performed with the highest washing force, and the flow rate is set to 260 cc / min when washing is performed with the highest force. lower wash. Therefore, the time required for the wash water to reach the lower limit water level from the upper limit water level is 8.7 seconds when the wash is performed with the highest wash force, and the time is 15 seconds when washing is performed with the lowest washing force.

Generally, the time required for a user to wash their intimate part is 30 seconds or more. Consequently, even when washing is performed with a lower washing force, 130 cc washing water is used. That is, during a washing operation performed once, it is possible to detect, at least once, a change in the amount of washing water from the water level of the upper limit to the water level of the lower limit by means of the electrode 622 water level.

Therefore, the control part 130 measures the elapsed time from the upper limit water level to the lower limit water level, and performs an arithmetic operation based on the measured time and an amount of water (65 cc). from the upper limit water level to the lower limit water level, thus calculating a wash water flow. Then, when there is a difference between the set flow rate for each wash force and the calculated flow rate, the control part 130 adjusts a water pump 516 output, thus correcting the wash water flow rate.

In this exemplary embodiment, the description is made by taking as an example the case where the lower surface of the subtank 600 has an approximately quadrangular shape. However, the present invention is not limited to such a configuration. For example, the lower surface of the subtank 600 can be formed in other polygonal shapes and can be changed taking into account a balance between the subtank 600 and the parts surrounding the subtank 600 and a situation of a place where the subtank 600 is installed.

In this exemplary embodiment, the description is made by taking as an example the case where the common electrode 621 and water level electrodes 622 are mounted on facing wall surfaces, that is, on the front wall and the rear wall respectively. However, the present invention is not limited to such a configuration. For example, the common electrode 621 and the water level electrodes 622 can be mounted on surfaces other than the aforementioned wall surfaces, such as wall surfaces arranged adjacent to each other, ie, the front wall and the side wall. Furthermore, the common electrode 621 can be mounted on the front wall and the water level electrodes 622 can be mounted on a top surface. In this case, it is necessary to make a lower limit electrode length 624 and an upper limit electrode length 623 different from each other so that a distal end of the lower limit electrode 624 is positioned at a lower limit water level and a distal end of upper limit electrode 623 is positioned at an upper limit water level.

In this exemplary embodiment, the description is made by taking as an example the case where the water level electrodes 622 include two electrodes, that is, upper limit electrode 623 and lower limit electrode 624. However, the present invention is not limited to such a configuration. For example, a water level detection range can be subdivided by providing three or more water level electrodes 622 or the like. Due to such a configuration, the accuracy of water level detection and the accuracy of flow detection can be further improved.

The subtank of this exemplary embodiment is constituted as described above.

<4> Threshold value correction in water level detection

Hereinafter, correction of a water level detection threshold value in the sanitary washing device of this exemplary embodiment is described with reference to FIG. 12 and FIG. 13.

FIG. 12 is a graph showing a change in the output voltage of the upper limit electrode, a change in the output voltage of the common electrode, and a threshold value for determining a submerged state and a non-submerged state of the upper limit electrode. FIG. 13 is a graph showing a change in the output voltage of the lower limit electrode, a change in the output voltage of the common electrode, and a threshold value for determining a submerged state and a non-submerged state of the lower limit electrode.

As described above, the detection data obtained by the water level detection sensor 620 in the subtank of this exemplary embodiment is not simply used for the detection of a water level, but is also used for the detection of a water level. flow rate by arithmetic processing. Consequently, it is necessary to detect a water level in the subtank with high detection accuracy.

Typically, the water level detection sensor 620 detects a water level based on an output voltage change between two electrodes. That is, the water level detection sensor 620 determines a water level by comparing an output voltage that changes depending on the contact or spacing of water level electrodes 622 with or from a wash water surface with a threshold value. However, an irregularity occurs in an output voltage of the water level detecting sensor 620 due to the electrical conductivity of the washing water, a temperature of the washing water, or the like.

That is, in the case of the sanitary washing device, it is difficult to make the electrical conductivity constant by limiting a type of washing water to be used. In addition, to correct an output voltage by detecting the electrical conductivity of the washing water when using the sanitary washing device, it is necessary to use a specific use detection sensor. However, the use of the specific use sensor increases the cost. With the foregoing in mind, according to this exemplary embodiment, a temperature-based correction is made using the detection data from the inlet water temperature sensor 630 mounted on the subtank 600. With such a correction, the flushing device Sanitary is configured to cope with various wash waters that have electrical conductivity in a wide range.

To be more specific, as indicated by a dashed line in FIG. 12, in a case where the upper limit electrode 623 is not immersed in washing water, an output voltage between upper limit electrode 623 and common electrode 621 is about 4.7 V when the inlet water temperature of the washing water is 5 ° C, and it is approximately 4.4 V when the inlet water temperature of the wash water is 40 ° C. Furthermore, an output voltage between the upper limit electrode 623 and the common electrode 621 changes approximately linearly in response to a change in temperature.

In a case where the upper limit electrode 623 is immersed in wash water, an output voltage between upper limit electrode 623 and common electrode 621 is approximately 2 V when the inlet water temperature of the wash water is 5 °. C, and it is about 1.4 V when the inlet water temperature of the wash water is 40 ° C. Furthermore, an output voltage between the upper limit electrode 623 and the common electrode 621 changes approximately linearly in response to a change in temperature.

That is, as described above, an output voltage changes depending on the input water temperature. Consequently, when a threshold value is made constant to determine a submerged state and a non-submerged state of the upper limit electrode 623, there is a possibility that erroneous detection will occur when using washing water having different electrical conductivity. Accordingly, it is effective to correct a threshold value in response to an inlet water temperature of the wash water.

Accordingly, in this exemplary embodiment, as indicated by a solid line in FIG. 12, a threshold value within a temperature range of 0 ° C to 5 ° C is set to 3.9 V, and a threshold value within a temperature range of 35 ° C to 40 ° C is set to 3, 3 V. A threshold value is set such that the threshold value changes in a stepwise fashion for every 5 ° C within a temperature range of 0 ° C to 40 ° C, for example.

Furthermore, as indicated by a dashed line in FIG. 13, in a case where the lower limit electrode 624 is not immersed in washing water, an output voltage between the lower limit electrode 624 and the common electrode 621 is about 4.5 V when the inlet water temperature of the Wash water is 5 ° C, and it is about 4.0 V when the inlet water temperature of the wash water is 40 ° C. Furthermore, an output voltage between the lower limit electrode 624 and the common electrode 621 changes approximately linearly in response to a change in temperature.

In a case where the lower limit electrode 624 is immersed in wash water, an output voltage between the lower limit electrode 624 and the common electrode 621 is approximately 1.5V when the inlet water temperature of the wash water is 5 ° C, and it is approximately 1 V when the inlet water temperature of the wash water is 40 ° C. Furthermore, an output voltage between the lower limit electrode 624 and the common electrode 621 changes approximately linearly in response to a change in temperature.

That is, as described above, in the same way as in the case of the upper limit electrode 623, an output voltage changes depending on the input water temperature. Consequently, when a threshold value is made constant to determine a submerged state and a non-submerged state of the lower limit electrode 624, there is a possibility that erroneous detection will occur when using washing water having different electrical conductivity. Accordingly, it is effective to correct a threshold value in response to an inlet water temperature of the wash water.

Accordingly, in this exemplary embodiment, as indicated by a solid line in FIG. 13, a threshold value within a temperature range of 0 ° C to 5 ° C is set to 3.5 V, and a threshold value within a temperature range of 35 ° C to 40 ° C is set to 2, 9 V. A threshold value is set in such a way that the threshold value changes in a stepwise fashion for every 5 ° C within a temperature range of 0 ° C to 40 ° C, for example.

The control portion 130 corrects the threshold values for the detection of the water level corresponding to the upper limit electrode 623 and lower limit electrode 624 as described above based on the detection data of a temperature of the wash water detected by the inlet water temperature sensor 630. Due to such correction, it is possible to accurately detect a water level of the washing water having electrical conductivity in a wide range.

<5> Heat exchanger configuration

Next, the configuration of the heat exchanger of the sanitary washing device of this exemplary embodiment is described with reference to FIG. 14 and FIG. fifteen.

FIG. 14 is a perspective view of an external appearance of the heat exchanger. FIG. 15 is a cross-sectional view of the heat exchanger.

In this exemplary embodiment, the buffer tank 750 is integrally formed with the heat exchanger 700, and the buffer tank 750 is mounted on an upper portion of the heat exchanger 700.

First, the heat exchanger 700 is formed into a flat plate shape having an approximately rectangular shape (including a rectangular shape) as seen in a front view (see FIG. 15). The heat exchanger 700 includes at least: shell 701 that is molded using a reinforced ABS resin made of an ABS resin composed of glass fibers; ceramic flat plate-shaped heater 702, hot water inlet member 703, and the like.

The housing 701 includes: the front surface member 710, which constitutes a front surface portion of the housing 701, and the rear surface member 720, which constitutes a rear surface portion of the housing 701. The heater 702 in the form of Flat plate is disposed in a space formed between front surface member 710 and rear surface member 720. The heating flow passage 715 is formed by a space defined between the front surface member 710 and the flat plate-shaped heater 702; and a gap defined between the rear surface member 720 and the flat plate-shaped heater 702. The heat exchanger 700 having the aforementioned configuration instantly increases the temperature of the wash water flowing through the heating flow passage 715 through the flat plate heater 702.

In the heat exchanger 700, the water inlet port 711, which constitutes a connection port, is formed at a lower right end of a front surface of the front surface member 710, and the hot water outlet port 712 that constitutes a connection port, it is formed in the hot water inlet member 703 which is mounted on an upper end of a right side surface of the front surface member 710.

As shown in FIG. 15, the water inlet passage 713, which is continuously formed with the water inlet port 711 shown in FIG. 14, is formed over substantially the entire width of the lower end portion of the housing 701. A plurality of grooves 714 are formed across the width of the upper surface of the passage 713 water inlet, and the wash water flowing into the water inlet passage 713 passes through the slits 714 and empties into the heating flow passage 715. The slits 714 have the function of allowing the wash water to flow to the heating flow passage 715 evenly over the entire width of the heating flow passage 715.

The dividing rib 716 is provided at an upper end portion of the heating flow passage 715, and an area above the dividing rib 716 forms the intermediate tank 750. A plurality of water passage holes 717 are formed in dividing rib 716 over substantially the entire width (including the entire width) of dividing rib 716. With such a configuration, the wash water that is heated by the heating flow passage 715 flows to the buffer tank 750 through the water passage ports 717.

The projections 718 having an approximately semicircular cross section (including a semicircular cross section), for example, are disposed on the buffer tank 750 at intervals over substantially the entire width (including the entire width) of the buffer tank 750. The projection 718 is provided to turbulent the flow of wash water flowing to the hot water outlet port 712 within the buffer tank 750. With such a configuration, the washing water is agitated so that the unevenness in the temperature of the washing water is eliminated, whereby the washing water having a uniform temperature flows out of the hot water outlet port 712.

Two thermistors, that is, the leaving hot water temperature sensor 730 and the excessively high temperature sensor 731 are mounted on the hot water inlet member 703. The leaving hot water temperature sensor 730 detects a washing water leaving hot water temperature. The excessively elevated temperature sensor 731 detects an excessively elevated temperature of the heat exchanger 700. With such a configuration, the control portion 130 controls the temperature of the wash water leaving the heat exchanger 700.

<6> Nozzle device setting

Next, the configuration of the nozzle device of the sanitary flushing device of this exemplary embodiment is described with reference to FIG. 18 to FIG. 30.

FIG. 18 is a perspective view showing a storage state of the nozzle device according to this exemplary embodiment. FIG. 19 is a cross-sectional view taken along line 19-19 shown in FIG. 18. FIG. 20 is a longitudinal cross-sectional view showing a storage state of the nozzle device. FIG. 21 is a cross-sectional view showing a detailed configuration of a portion B shown in FIG. 20. FIG. 22 is a cross-sectional view taken along line 22-22 shown in FIG. 21. FIG. 23 is a cross-sectional view showing a storage state of the nozzle device. FIG. 24 is a cross-sectional view showing a detailed configuration of a portion C shown in FIG. 23. FIG. 25 is a longitudinal cross-sectional view showing a buttock wash condition of the mouthpiece device. FIG. 26 is a cross-sectional view showing a detailed configuration of a portion D shown in FIG. 25. FIG. 27 is a longitudinal cross-sectional view showing a bidet flushing state of the nozzle device. FIG. 28 is a cross-sectional view showing a detailed configuration of a portion E shown in FIG. 27. FIG. 29 is a cross-sectional view of the nozzle portion showing a bidet flushing state of the nozzle device. FIG. 30 is a cross-sectional view showing a detailed configuration of a portion G shown in FIG. 29.

As shown in FIG. 18, the nozzle device 800 includes at least the support portion 810, the nozzle portion 820, the nozzle actuating portion 860, the flow regulating valve 870, and the like. The support portion 810 is molded using a resin material such as POM (polyoxymethylene) or ABS, for example, and formed into an approximately triangular frame shape (including a triangular shape) as seen in a side view. The nozzle portion 820 moves back and forth along the support portion 810. The nozzle drive portion 860 drives and moves the nozzle portion 820 back and forth. The flow regulating valve 870 changes the supply of wash water to the nozzle portion 820.

In the description of the nozzle device made below, the arrangement of the respective constitutional elements is described assuming that a direction along which the nozzle portion is stored is a backward direction, a direction along which The nozzle portion advances is a forward direction, a right side in a direction from a rear side to a front side is a right side, and a left side in a direction from a rear side to a front side is a left side.

The support portion 810 is frame-shaped, and is formed by: an inclined portion 812 that is lowered toward a front portion from a rear portion thereof with respect to a bottom side portion 811 disposed approximately horizontally (including horizontally). ); and the vertical side portion 813 connecting a rear end of the bottom side portion 811 and a rear end of the inclined portion 812 to each other. The guide rail 814 that guides the forward and backward movement of the nozzle portion 820 and the support guide 815 (see FIG. 19) whose flexible guide support 861 (see FIG. 19) of the portion 860 of nozzle drive se they form over substantially the entire length (including the entire length) of the sloped portion 812. The retaining portion 816 having an approximately circular cylindrical shape (including a circular cylindrical shape) that supports the nozzle portion 820 in a surrounding manner is integrally formed on a lower side of a front end of the sloped portion 812.

As shown in FIG. 19, the guide rail 814 whose nozzle portion 820 guides are formed in an approximately T-shape (including a T-shape) in cross section. The support guide 815 whose flexible guide support 861 has approximately a U-shape (including a U-shape) as seen in cross-section where one side surface is open. The support guide 815 is configured to guide the flexible support 861 while restraining the upper and lower surfaces and a side surface of the flexible support 861.

The support guide 815 is also formed on the vertical side portion 813 and the bottom side portion 811 arranged at a rear portion of the continuously inclined portion 812 support portion 810. The support guides 815 in a corner formed by the inclined portion 812 and the vertical lateral portion 813 are connected to each other in an arcuate manner, for example, and the support guides 815 in a corner formed by the vertical lateral portion 813 and the vertical portion 811 bottom side are connected to each other in an arcuate fashion, for example. The support guide 815 formed on the vertical side portion 813 and the support guide 815 formed on the bottom side portion 811 have approximately a U-shape (including the U-shape) in cross section. On the other hand, with respect to an open side surface of the support guide 815, a left side surface of the support guide 815 opens onto the inclined portion 812, and an opposite side to the left side surface, that is, a right side. The surface of the support guide 815 is open over the vertical side portion 813 and the bottom side portion 811. Furthermore, the open surfaces of the support guides 815 on the vertical side portion 813 and the bottom side portion 811 are closed by a cover of the support portion or the like which is a separately provided member of the support guide 815, for instance.

The nozzle drive portion 860 includes: the flexible support 861 which is attached to the nozzle portion 820; gear pinion 862 that is meshed with flexible bracket 861; and the drive motor 863 that rotatably drives the gear pinion 862. The nozzle drive portion 860 moves the nozzle portion 820 back and forth along the guide rail 814.

The drive motor 863 is formed by a stepper motor, for example, and a rotation angle of the drive motor 863 is controlled by a pulse signal. Furthermore, due to the rotation of the drive motor 863, the flexible bracket 861 is driven by the gear pinion 862.

A gap is defined between an inner peripheral surface of the retaining portion 816 of the support portion 810 and an outer peripheral surface of the nozzle portion 820. The wash water expelled from the nozzle portion 820 flows into the gap and washes an outer peripheral surface of the nozzle portion 820.

The nozzle cap 801 is disposed on a front side of the retaining portion 816 in an openable and closable manner, and opens or closes in response to the advancement and retreat of the nozzle portion 820. By closing the mouthpiece cap 801 in a state where the mouthpiece portion 820 is stored, it is possible to prevent the mouthpiece portion 820 from being contaminated with feces or the like.

On the bottom side portion 811 of the support portion 810, the water supply joint 817 is formed which connects a water supply pipe (not shown in the drawing) connected to a wash water supply portion and a connecting tube 802 provided to supply flushing water to flow regulating valve 870 from support portion 810 to each other.

As shown in FIG. 23, the nozzle portion 820 includes at least: the bar-shaped nozzle body 830 that is molded using a resin material such as ABS, for example; nozzle cover 840; the connecting portion 850 and the like. The nozzle cover 840 is cylindrical in shape and substantially covers the entire nozzle body 830 (including the entire nozzle body 830). At the connection portion 850, the nozzle body 830 tows the nozzle cover 840.

As shown in FIG. 6, the nozzle body 830 of the nozzle portion 820 includes: the buttock washing portion 831 for washing an intimate part; the bidet wash portion 832 for washing an intimate part of a woman; the nozzle cleaning portion 833 for cleaning the nozzle portion 820 and the like.

As shown in FIG. 25 and FIG. 26, the buttock wash portion 831 includes: the buttock wash water jet port 834 that is formed over a distal end portion of the nozzle body 830 in an upwardly opening manner; and the buttock wash water flow passage 835 communicating with the buttock wash water jet port 834 from the rear end of the nozzle body 830. The buttock wash water flow passage 835 is disposed on one side of the lower portion of the nozzle body 830, and has a bent portion that bends upward and is formed below the wash water jet port 834. buttocks. The straightening plate 835a that straightens the wash water flow is disposed on the folded portion. With such a configuration, the wash water ejected from the buttock wash water jet port 834 is ejected upward through the jet opening 844 formed on the nozzle cover 840.

As shown in FIG. 27 and FIG. 28, the bidet wash portion 832 includes: the bidet wash water jet port 836 located behind the buttock wash water jet port 834; and the bidet wash water flow passage 837 communicating with the bidet wash water jet port 836 from the rear end of the nozzle body 830. The wash water expelled from the bidet wash water jet port 836 is expelled upward through the jet port 844 formed in the nozzle cover 840.

As shown in FIG. 29, the nozzle cleaning portion 833 includes: the nozzle cleaning jet port 38 disposed on a side surface of the nozzle body 830; and the nozzle cleaning flow passage 839 communicating with the nozzle cleaning jet port 38 from the rear end of the nozzle body 830. The wash water expelled from the nozzle cleaning jet port 38 is expelled into the nozzle cover 840, and discharged to the outside of the nozzle cover 840 from the water discharge port 845 of the nozzle cover 840. nozzle. The wash water ejected from the nozzle cleaning jet port 38 is used to clean the nozzle portion 820 and the surroundings of the nozzle portion 820.

The front side of the nozzle portion 820 is supported in a state where the front side of the nozzle portion 820 is inserted into the retaining portion 816 of the support portion 810, and a rear portion of the nozzle portion 820 is arranged in a sliding form in a state where the rear portion of the nozzle portion 820 is suspended from the guide rail 814. The nozzle portion 820 is configured to move back and forth between a storage position shown in FIG. 18 where the mouthpiece portion 820 is stored in an area behind the retention portion 816, a buttock wash position shown in FIG.

25 where the nozzle portion 820 protrudes from the retention portion 816, and a bidet wash position shown in FIG. 27.

The nozzle cover 840 includes the nozzle cover body 841 and the connecting member 842. The nozzle cover body 841 is formed by forming a thin stainless steel plate in a circular cylindrical shape, for example. A distal end surface of the mouthpiece cover body 841 is formed on a closed surface, and a rear end surface of the mouthpiece cover body 841 is formed on an open surface. The connecting member 842 is molded using a resin material such as ABS, for example, and has an approximately circular cylindrical shape (including a circular cylindrical shape). The connecting portion 843 that engages with the nozzle body 830 is formed on both side portions of the connecting member 842.

A mouthpiece cover plug (not shown in the drawing) for restricting a sliding range of the mouthpiece cover 840 is integrally formed on a right rear end of the connecting member 842. Furthermore, the mouthpiece cover plug is configured so that the sliding range of the mouthpiece cover 840 is restricted by bringing the mouthpiece cover plug into contact with a receiving portion of the front plug (not shown in the drawing ) and a rear plug receiving portion (not shown in the drawing) formed on the support portion 810.

A portion of the connection member 842 is attached and integrally formed with the mouthpiece cover body 841 in a state where the portion of the connection member 842 is inserted into the inside of the mouthpiece cover body 841 from an opening formed at one end. rear of nozzle cover body 841.

The single jet opening 844 that can face the butt wash water jet port 834 and the bidet wash water jet port 836 of the nozzle body 830 is formed on an upper front surface of the mouth cover body 841. nozzle. The water discharge port 845 is formed through which the washing water flowing out into the nozzle cover body 841 is discharged to the outside at a front lower surface of the nozzle cover body 841.

An inside diameter of the nozzle cover 840 is slightly larger than an outside diameter of the nozzle body 830. With such a configuration, the nozzle body 830 and the nozzle cover 840 are configured so that they can slide smoothly relative to each other in a state where the nozzle body 830 is inserted into the nozzle cover 840.

The flow regulating valve 870 is mounted on a rear end surface of the nozzle body 830. A water supply port (not shown in the drawing) for supplying flushing water to the flow regulating valve 870 is formed on an outer surface of the flow regulating valve 870, and the water supply port is attached to and It communicates with the water supply joint 817 mounted on the support portion 810 via connecting tube 802.

Next, the connecting portion 850 of this exemplary embodiment which is formed by the connecting member 842 of the nozzle cover 840 and the connecting receiving portion 851 of the nozzle body 830 is described with reference to FIG. 24 and FIG. 30.

As shown in FIG. 24 and FIG. 30, the connection receiving portion 851 is formed on a right side of an outer periphery of a rear end portion of the nozzle body 830. Two grooves having approximately a V-shape (including a V-shape) that constitute the front recessed portion 851a and the rear recessed portion 851a, respectively, are formed on a front side and a rear side of the connecting receiving portion 851. The front recessed portion 851a and the rear recessed portion 851a are disposed spaced apart from each other in a longitudinal direction of the nozzle body 830. The distance between the front recessed portion 851a and the rear recessed portion 851a is equal to the distance between the buttock wash water jet port 834 and the bidet wash water jet port 836.

On the other hand, the connecting member 842 of the nozzle cover 840 is molded using a resin material such as ABS and POM, for example, and is given an approximately circular cylindrical shape (including a circular cylindrical shape). The rearward projecting connecting piece 843 is formed on both side portions of a rear portion of the connecting member 842. Approximately the inwardly projecting V-shaped connecting boss 843a (including a V-shaped one) is formed on a rear portion of the connecting piece 843.

When the nozzle body 830 is inserted into the nozzle cover 840, the connecting projection 843a of the nozzle cover 840 connecting member 842 always comes into pressure contact with the connecting receiving portion 851 of the nozzle body 830. due to the elasticity of the connecting member 842. In such a state, when the connecting projection 843a connects with the front recessed portion 851a or the rear recessed portion 851a, the nozzle body 830 and the nozzle cover 840 are brought into a mutually connected state. With such a configuration, the nozzle cover 840 is movable by being towed by the nozzle body 830.

In a state where the connecting projection 843a enters the front recessed portion 851a as shown in FIG. 24, the bidet wash water jet port 836 of the nozzle body 830 and the jet opening 844 of the nozzle cover 840 face as shown in FIG. 28. On the other hand, as shown in FIG. 30, in a state where the connecting projection 843a enters the rear recessed portion 851a, the buttock wash water jet port 834 and the jet opening 844 face as shown in FIG. 21 and FIG. 26. With such a configuration, the wash water can be expelled from a predetermined jet port.

<7> Flow regulating valve setting

First, the configuration of the flow regulating valve of the sanitary flushing device of this exemplary embodiment is described with reference to FIG. 31 and FIG. 32.

FIG. 31 is a plan view of a fixed disk of the flow regulating valve. FIG. 32 is a plan view of a movable disk of the flow regulating valve.

As shown in FIG. 24 and FIG. 30, the flow regulating valve 870 is attached to the housing 872 which is integrally formed with the nozzle body 830, and includes at least the fixed disk 873, the movable disk 874, the stepper motor 875, and the like. The fixed disk 873 includes ports that communicate with the respective wash water flow passages of the nozzle body 830. The mobile cisco 874 switches the port through which the wash water is supplied. The stepper motor 875 rotationally drives the movable disk 874.

As shown in FIG. 31, the fixed disk 873 includes at least the stop port 876, the nozzle flush port 877, the buttock flush port 878, and the bidet flush port 879. Stop port 876 is a port for stopping the wash water supply. The nozzle cleaning port 877 is a port for the supply of wash water to the nozzle cleaning flow passage 839. The buttock wash port 878 is a port for supplying the wash water to the butt wash water flow passage 835. The bidet wash port 879 is a port for the supply of wash water to the bidet wash water flow passage 837.

In addition, the stop port 876 is formed by a flat surface that closes the flow path. The nozzle cleaning port 877 is formed by a through hole having a roughly trapezoidal shape (including a trapezoidal shape).

The buttock wash port 878 has an arcuate circular shape that has a great width as a whole. The buttock flush port 878 includes the water passage portion 878a that penetrates the fixed disk 873 and forms a portion of the buttock flush port 878, and the plug portion 878b that is recessed without penetrating the disk. 873 fixed and forms a portion of the buttock wash port 878. The plug portion 878b is formed on a side adjacent to the nozzle cleaning port 877. The plug portion 878b is provided to suppress an amount of wash water that passes through the buttock wash port 878.

The bidet flush port 879 includes, in the same manner as the buttock flush port 878, the water passage portion 879a and the plug portion 879b.

On the other hand, as shown in FIG. 32, the water passage hole 874a is formed in the penetratingly movable disk 874 in a roughly trapezoidal shape (including a trapezoidal shape). In addition, the orifice Bearing 874b into which a rotary shaft of the stepper motor 875 is inserted is formed in the center of the movable disk 874.

In an assembled state of the flow regulating valve 870, the fixed disk 873 and the movable disk 874 are configured to be rotatable in a close contact state. Furthermore, the movable disk 874 is rotated at a predetermined angle and stopped in a rotated position by driving the stepper motor 875.

Next, the way of operation of the flow regulating valve of this exemplary embodiment is described with reference to FIG. 33.

FIG. 33 is a schematic view showing the relative positional relationship between the fixed disk 873 and the movable disk 874 for the respective operating states of the flow regulating valve 870. In a left side column and a center column in FIG. 33, the individual arrangement states of the fixed disk 873 and the movable disk 874 are respectively shown in their respective operating states. In a column on the right hand side in FIG. 33, the relative positions of the fixed disk 873 and the movable disk 874 are shown in a set state.

First, in the stopped state, the water through the hole 874a formed in the movable disk 874 is disposed over the stop port 876 formed on the fixed disk 873. With such a configuration, the water through the well 874a is brought to a closed state by the stop port 876. As a result, a state occurs where no wash water is supplied to any of the flow passages of the nozzle body 830.

Then, in the nozzle cleaning state, the water passage hole 874a formed in the movable disk 874 is disposed over the nozzle cleaning port 877 formed in the fixed disk 873. With such a configuration, the wash water passes through the orifice 874a and the nozzle cleaning port 877 and is supplied to the nozzle cleaning flow passage 839 of the nozzle body 830.

Next, when an operating state is switched to a buttock flushing state from the nozzle cleaning state, an operating state is shifted to the butt flushing state through a state taken in the course of the switching shown. in FIG. 33. Then, immediately after the switching operation is started, as can be understood from a set state taken in the course of switching shown in FIG. 33, the water passage hole 874a formed in the movable disk 874 is disposed in both the nozzle cleaning port 877 and the plug portion 878b of the buttock wash port 878. In such a state, the wash water is supplied to both flow passages, that is, the nozzle cleaning flow passage 839 and the butt wash water flow passage 835 of the nozzle body 830 in parallel. Accordingly, the wash water is supplied through the plug portion 878b of the buttock wash port 878. As a result, it is possible to suppress an extremely large change in the amount of wash water flowing through the entire flow regulating valve 870.

As shown in FIG. 33, after an operating state passes the state taken in the course of switching, the movable disk 874 stops at a position where the movable disk 874 faces the water passage portion 878a formed in the wash port 878 buttocks. Accordingly, the wash water can only be supplied to the buttock wash water flow passage 835 of the nozzle body 830.

As described above, the flow regulating valve 870 of this exemplary embodiment has a simultaneous supply function capable of supplying wash water to both the nozzle cleaning flow passage 839 and the butt wash water flow passage 835 of the nozzle body 830 simultaneously when an operating state switches to the buttock washing state from the nozzle cleaning state. With such a configuration, there is no possibility that the wash water flow stops at the time of switching the operating state. Accordingly, it is possible to suppress a sudden change in a load applied to the water pump 516 and the heat exchanger 700. As a result, the temperature of the washing water can be kept stable. Furthermore, it is possible to prevent the flow passage members, such as the water pump 516 and the heat exchanger 700, from being damaged.

During a period where the wash water is supplied simultaneously to the nozzle cleaning flow step 839 as well as the nozzle body butt wash water flow step 835, the wash water flows through the nozzle body 878 port 878. Buttock wash is delivered through the obturator portion 878b. Accordingly, the flow rate of the washing water at the time of switching an operating state can be stabilized. Therefore, it is possible to stabilize the temperature of the washing water, and at the same time, it is possible to prevent the flow passage members from being damaged more surely.

Normally, the electricity input to the flat plate heater 702 of the heat exchanger 700 is controlled so that the temperature of the wash water becomes a fixed value. Accordingly, when a flow rate of the wash water changes, the temperature of the wash water also changes. That is, it is preferable that a wash water flow rate is set to a fixed flow rate as much as possible also when a flow step is switched from the nozzle cleaning flow step 839 to the butt wash water flow step 835. . In view of the above, by making a flow rate at the time of switching a flow path stable as described above, it is possible to suppress a change in the temperature of the washing water in the hot water state. When controlling a driving duty ratio of the water pump 516 to a fixed value, it is preferable that a pressure drop in the nozzle cleaning flow step 839 and a pressure drop in the nozzle cleaning flow step 835 are established. buttock wash water substantially equal as much as possible. Alternatively, when a pressure loss in the nozzle cleaning flow passage 839 and a pressure loss in the buttock wash water flow passage 835 cannot be substantially equalized, it is preferable to set a duty ratio of the pump. 516 of water in an interlocking manner with a flow regulator valve 870 operation to switch a flow passage.

In the exemplary embodiment mentioned above, although the description has been made with reference to FIG.

Taking as an example the case where an operating state of the sanitary flushing device 100 is switched from a nozzle cleaning state to a butt flushing state, substantially the same way of operation of the flow regulating valve is applicable to a case where an operating state switches from a nozzle cleaning state to a bidet washing state. That is, the flow regulating valve is configured in such a way that first, the water passage hole 874a formed in the movable disk 874 passes into a state taken in the course of switching where the water passage hole 874a formed in the movable disk 874 is arranged in both the nozzle cleaning port 877 and the shutter portion 879b of the bidet flushing port 879, and then the movable disk 874 water passage hole 874a stops at the portion 879a water passage of bidet wash port 879. With such a configuration, the mode of operation and advantageous effects substantially the same as those acquired in the buttock wash can be acquired.

<8> Control and way of operation of the washing part

Next, the control and operation of the washing part of the sanitary washing device according to this exemplary embodiment is described.

First, the basic mode of operation of the washing portion 500 is described with reference to FIG. 6 onwards.

First, the tap water flowing through the city water pipe is supplied to the sanitary flushing device 100 from the water supply connection port 510 as flushing water. Then, the electromagnetic water stop valve 514 is opened so that the wash water is supplied to the subtank 600. In this stage of operation, a flow rate of the wash water flowing through the flow passage is kept at a fixed value. via constant flow regulating valve 513. The actuation of the electromagnetic water stop valve 514 is controlled by the control part 130 based on an operation of the remote control 400 and an operation of the operating part 210.

Next, the wash water supplied to subtank 600 is stored in subtank 600 and, at the same time, is supplied to heat exchanger 700 and water pump 516. In addition, upon actuation of the water pump 516, wash water is supplied to the nozzle device 800 through the flow regulating valve 870. The driving of the water pump 516 is controlled by the control part 130 based on a remote control operation 400 and an operation of the operating part 210.

Next, the control part 130 starts driving the water pump 516 and confirms the normal operation of the water pump 516. Thereafter, the control part 130 begins to heat the wash water by supplying electricity to the flat plate heater 702 of the heat exchanger 700. In this stage of operation, the control part 130 controls the supply of electricity to the flat plate heater 702 based on the information detected by the inlet water temperature sensor 630 and the hot water temperature sensor 730. Exit. Furthermore, the control part 130 performs a control to maintain a temperature of the wash water at a temperature set by the hot water temperature switch 231 of the operating part 210.

Next, the control part 130 controls the flow regulating valve 870 based on the operation information from the operation part 210 and the operation information from the remote control 400. In response to such control, the flow regulating valve 870 selects the flow path of the wash water by switching and supplies wash water to any of the buttock wash portion 831, bidet wash portion 832, and the bidet wash portion. 833 nozzle cleaning device 800 nozzle. With such an operation, the wash water is released from one of the butt wash water jet port 834, the bidet wash water jet port 836 and the nozzle cleaning jet port 38.

Next, a description is made regarding a control relating to the subtank 600, the heat exchanger 700, and the water pump 516 in this exemplary embodiment.

First of all, the description is made with respect to a control of the washing part in an initial stage of the use of the sanitary washing device of this embodiment with reference to FIG. 3. 4.

FIG. 34 is a time chart of the washing part in the initial stage of the use of the sanitary washing device. FIG. 34 is a time graph of the respective functions of the washing part in the initial stage of the use of the sanitary washing device where the washing water is not stored in the washing part, such as a case where the sanitary washing device It is used for the first time after the installation of the sanitary washing device or a case where the washing part is reused after performing a draining operation to prevent freezing of the washing water.

As shown in FIG. 34, at a time point P1, the wash switch of the operative part 210 or the wash switch of the remote control 400 (eg, the butt wash switch 221 or the butt wash switch 410) is actuated. With such an operation, the control part 130 starts the supply of washing water by supplying electricity to the electromagnetic water stop valve 514. Simultaneously, the control part 130 initiates actuation of the water level detection sensor 620. The conduction of the water level detection sensor 620 continues until a time point P14 where the water level detection sensor 620 detects an upper limit water level at which the subtank 600 reaches a full fill state once after the post-wash.

Next, when the water level detecting sensor 620 detects an upper limit water level at a time point P2, the control part 130 starts time measurement. Furthermore, after a predetermined time has elapsed, that is, at a time point P3, the supply of electricity to the electromagnetic water stop valve 514 is stopped so that the supply of washing water is stopped.

In this exemplary embodiment, the supply of electricity stops after two seconds have elapsed from the detection of the upper limit water level. The reason is as follows. At the time P2 where the upper limit water level is detected, basically, the subtank 600 and the heat exchanger 700 reach a full fill state. By continuing to supply the wash water for two seconds, the water pressure can be increased so that the supply of wash water to the water pump 516 and the removal of air in the heat exchanger 700 can be performed with certainty. . As a result, the waterless heating of the heat exchanger 700 can be avoided with certainty, and therefore, the stability and durability of the heat exchanger 700 can be guaranteed.

Next, the control part 130 drives the driving of the water pump 516 at the time point P3 where the supply of electricity to the electromagnetic water stop valve 514 is stopped. Simultaneously, the control portion 130 operates the flow regulating valve 870 to initiate the supply of wash water to the butt wash water flow passage 835 from the nozzle portion 820. In this stage of operation, due to the actuation of the water pump 516, a level of wash water in the subtank 600 is lowered and, at a point of time P4, the detection of an upper limit water level is canceled by the water level detection sensor 620. Therefore, at the time P4, the control part 130 starts to drive the heat exchanger 700. That is, due to the detection of a drop in the water level, it is confirmed that the water pump 516 works normally. With such an operation, it is possible to avoid abnormal temperature rise in the heat exchanger 700 or the like.

Then, the wash water supplied to the buttock wash water flow passage 835 is expelled from the butt wash water jet port 834. The expelled wash water passes through the jet opening 844 and collides with and is reflected on an inner surface of the retention portion 816 formed on a distal end of the support portion 810. With such an operation, an outer surface of the nozzle cover 840 is cleaned. In this exemplary embodiment, said cleaning operation is hereinafter referred to as "prewash". The pre-wash is continued, for example, up to a point of time P5 which comes after two seconds have elapsed from a point of time where the temperature of the hot water of the wash water in the heat exchanger 700 reaches 25 ° C.

Next, when the prewash is finished at the time point P5, the control part 130 begins to actuate the nozzle drive part 860 of the nozzle device 800 so that the nozzle portion 820 is advanced from an accommodated position to a buttock wash position. In this stage of operation, simultaneously with the start of driving of the nozzle drive part 860, the control part 130 switches the flow regulating valve 870 to start the supply of wash water to the flow passage 839 of nozzle cleaning. The wash water supplied to the nozzle cleaning flow passage 839 is injected into the nozzle cover 840 from the nozzle cleaning jet port 38. The expelled wash water flows out to the outside of the nozzle cover 840 from the water discharge port 845 after washing the inside surface of the nozzle cover 840. During said operation, the nozzle portion 820 is heated with wash water. Due to such heating, it is possible to prevent a user from feeling discomfort due to the jet of cold water during the buttock washing performed after said nozzle cleaning operation.

Next, at a time point P6 where the nozzle portion 820 reaches the buttock wash position, the control portion 130 switches the flow regulator valve 870 from the nozzle cleaning flow step 839 to the step 835 of buttock wash water flow to start the wash water supply to the butt wash water flow step 835. Then, due to the parallel supply function of the 870 flow regulator valve described in <7> Flow regulator valve configuration, in the course of switching the flow path from the nozzle cleaning flow step 839 to the butt wash water flow step 835, the wash water is supplied simultaneously to the nozzle cleaning flow step 839 and the nozzle cleaning flow step 835. buttock wash. Accordingly, there is no possibility that the supply of washing water is interrupted during the switching of the flow path.

The wash water supplied to the butt wash water flow passage 835 is expelled from the butt wash water jet port 834, and passes through the jet port 844 and washes an intimate part of a user. Then, the buttock wash operation continues until a time point P11 where a wash stop operation is performed.

In general, there is a possibility that a phenomenon occurs where an overshoot or undershoot occurs in the initial temperature rise of the hot water discharged from the heat exchanger 700 depending on a control condition. To overcome this drawback, in this exemplary embodiment, the sanitary washing device is configured to control the washing part in order to prevent the washing water from hitting an unstable temperature on a human body due to such phenomenon, particularly in a single stage. initial wash operation. In particular, the wash water whose temperature at the time of starting the wash operation is unstable is discharged to an area below the nozzle of the nozzle cleaning jet port 38 as drain water.

That is, in this particular exemplary embodiment, the wash water is expelled into the nozzle cover 840 from the nozzle cleaning jet port 38 between the pre-wash where the outer surface of the nozzle cover 840 is cleaned. nozzle and an operation where the nozzle portion 820 is extended to the buttock washing position from the accommodated position. With such an operation, the washing water which is heated by the heat exchanger immediately after the supply of electricity to the heat exchanger and having an unstable discharge temperature is prevented from being purged to a human body, and the washing water it is discharged as wash water to clean the nozzle portion 820. As a result, in the washing position, the washing water ejected from the butt wash water jet port or from the bidet wash water jet port can be ejected with a stable hot water temperature from the beginning of the jet in a state where the washing water is sufficiently hot.

The control part 130 controls the wash water temperature to a set temperature based on the detection data from the inlet water temperature sensor 630 and the detection data from the outlet hot water temperature sensor 730 during actuation. of the heat exchanger 700.

As described above, the water pump 516 and heat exchanger 700 are continuously operated from a point in time where the "prewash" starts to a point in time where the buttock wash ends. Furthermore, the wash water is supplied at a stable temperature during said actuation.

Next, when driving the water pump 516 is continued, the wash water level in the subtank 600 is lowered. Then, at a time point P7 where the water level detection sensor 620 detects a level of lower limit water, the control part 130 starts supplying electricity to the electromagnetic water stop valve 514. Thereafter, the supply of electricity continues until a time point P8 where the water level detection sensor 620 detects an upper limit water level.

At the time P8 where the upper limit water level is detected, the control part 130 stops supplying electricity to the electromagnetic water stop valve 514 and at the same time starts the time measurement. Then, the control part 130 measures an elapsed time from the time point P8 to a time point P9 where the water level detecting sensor 620 detects a lower limit water level next time.

Next, at the time P9 where the lower limit water level is detected, the control part 130 calculates a wash water flow rate by arithmetic processing based on a measured elapsed time and an amount of water from a water level. upper limit to a lower limit water level (65cc). When there is a difference between a flow rate that is set for each wash force and a wash water flow rate expelled at a time point P10 where the calculation of the wash water flow rate is finished by arithmetic processing, the control part 130 adjusts a water pump outlet 516 for correcting the flow rate of wash water.

Next, at a time point P11 where a wash stop operation is performed using the operating part 210 or the remote control 400, the control part 130 stops supplying electricity to the water pump 516 and the heat exchanger 700. hot. Simultaneously, the control part 130 actuates the nozzle actuating part 860 of the nozzle device 800 to retract the nozzle portion 820 to the accommodated position from the buttock washing position.

Then, at a point in time P12 where the nozzle portion 820 retracts to the accommodated position, the control part 130 stops the actuation of the nozzle drive part 860 of the nozzle device 800. Simultaneously, the control part 130 again actuates the water pump 516 and the heat exchanger 700 to initiate the "post-wash" where the nozzle portion 820 is cleaned. So, at a point in time P13 where a predetermined time elapses from the start of the "post-wash", the control part 130 stops driving the water pump 516 and the heat exchanger 700. With such an operation, the "post-wash" is finished.

Next, at the time P13 where the post-wash of the nozzle portion 820 ends, the control part 130 returns electricity to the electromagnetic water stop valve 514 so that the wash water is supplied to the sub-tank 600. Then, At a time point P14 where the upper limit of the water level is sensed, the control portion 130 stops supplying electrical power to the electromagnetic water stop valve 514 to end a series of controls for the buttock wash. With such an operation, the subtank 600 goes into a completely filled state and the washing part is brought into a waiting state.

As described above, a control of the washing part is performed at the time of initial use of the sanitary washing device of this exemplary embodiment.

Next, the description is made with respect to a control of the washing part at the time of normal use of the sanitary washing device of this exemplary embodiment with reference to FIG. 35.

FIG. 35 is a time graph of the washing part at the time of normal use of the sanitary washing device. FIG. 35 is a time chart of the sanitary washing device when a washing operation is performed with the sanitary washing device in a standby state that comes after the initial use previously made.

That is, a control of the washing part at the time of normal use shown in FIG. 35 differs from the control of the wash portion at the time of initial use shown in FIG. 34 with respect to a point where the subtank 600 is already in a full fill state at a time point P20 where the flushing operation is performed and a point where the control part 130 stores in a memory that the initial use of the device sanitary washing has already been carried out.

That is, as shown in FIG. 35, at time P20, the flushing switch of the operating part 210 or remote control 400 (for example, the butt flushing switch 221 or 410) is operated in a standby state where the subtank 600 is in a full state. full. With such an operation, the control part 130 supplies electricity to the electromagnetic water stop valve 514 to start the supply of washing water. Simultaneously, the control part 130 starts supplying electricity to the heat exchanger 700 based on the stored data that an initial operation control has already performed. Then, the control part 130 starts the "prewash" operation of the nozzle device 800 simultaneously with the supply of electricity to the heat exchanger 700. Furthermore, the control part 130 initiates the actuation of the water level detecting sensor 620 simultaneously with the supply of electricity to the heat exchanger 700.

That is, the initial use case described with reference to FIG. 34 and the normal use case differ from each other with respect to a control from a point of time when the washing operation is performed to a point of time when the supply of electricity to the heat exchanger 700 is started. However, both cases are substantially the same with respect to the control and the mode of operation after a time point P5 where the actuation of the nozzle device 800 is initiated and therefore the repeated description of the control and the form is omitted. after the time point P5.

As described above, in the sanitary washing device of this exemplary embodiment, when the washing operation is performed, the driving of the water pump and the heat exchanger is started in a state where the nozzle portion is in a position well-off. Next, the nozzle portion is advanced to the washing position and an intimate part washing operation is performed. During this period, the water pump and heat exchanger run continuously. Accordingly, it is possible to suppress the lowering of the temperature of the nozzle portion and of the washing water in the course of movement of the nozzle portion. Accordingly, the washing water ejected from the butt washing water jet port or the bidet washing water jet port can be ejected at the washing position from the start of the jet in a state that the wash water is sufficiently heated. As a result, it is possible to realize a sanitary washing device capable of comfortable washing.

In the sanitary wash device of this exemplary embodiment, at the time of switching the flow path from the nozzle cleaning flow path to the buttock wash water flow path or the butt wash water flow path bidet, wash water is supplied simultaneously to both the nozzle cleaning flow path and the buttock wash water flow path or the bidet wash water flow path. Accordingly, there is no possibility that the wash water flow stops at the time of switching the flow path. Accordingly, it is possible to suppress a sudden change in a load applied to the water pump and the heat exchanger. As a result, the temperature of the washing water can be kept at a stable temperature. Furthermore, it is possible to prevent the flow passage members such as the water pump and the heat exchanger from being damaged.

In addition, during a period where wash water is supplied simultaneously to the nozzle cleaning flow step and the butt wash water flow step or the bidet wash water flow step, the wash water that flows through the buttock flush port is delivered through the obturator portion. Accordingly, the flow rate of the washing water at the time of switching the flow path can be made more stable. As a result, it is possible to stabilize the temperature of the washing water and, at the same time, it is possible to prevent the flow passage members from being damaged with greater certainty.

Furthermore, in the sanitary flushing device of this exemplary embodiment, a change in the water level is detected by the water level detecting sensor mounted on the sub-tank, and a flushing water flow rate is detected by an arithmetic operation. With such an operation, it is not necessary to provide a specific use flow sensor to further detect a flow rate in the washing part. As a result, the configuration of the washing part can be simplified, thereby achieving cost reduction.

In the sanitary washing device of this exemplary embodiment, a threshold value is corrected to determine an output voltage change between the electrodes in detecting the water level based on the temperature of the washing water. With such an operation, it is possible to increase the precision of water level detection and the precision of flow detection so that water that differs from each other in electrical conductivity over a wide range can be used as wash water. for the sanitary washing device. As a result, a range of applications and usability of the sanitary washing device can be further improved.

Furthermore, in the sanitary flushing device of this exemplary embodiment, at the time of initial use of the sanitary flushing device, a fully filled state of the subtank is detected and the water supply continues for a predetermined period thereafter. Simultaneously, after operating the water pump, electricity supply to the heat exchanger is started after the detection of the upper limit water level is canceled by the water level detection sensor. With such an operation, it is possible to avoid waterless heating of the heat exchanger. Accordingly, the configuration of this exemplary embodiment can be simplified compared to the conventionally adopted configuration that avoids heating without water using a flow sensor. With such a configuration, it is possible to realize that the sanitary washing device has high safety and reliability at a low cost.

In this exemplary embodiment, the description has been made by taking the configuration where the nozzle portion is provided with three jet ports, that is, the buttock wash water jet port, the buttock wash water jet port, bidet and nozzle cleaning water jet port as an example. However, the present invention is not limited to such a configuration. For example, the nozzle portion may be provided with four or more jet ports or two or less jet ports. With such a configuration, a nozzle portion provided with many washing functions or a nozzle portion provided with a specific use washing function can also acquire substantially the same advantageous effects. In this case, it is sufficient that a portion of the nozzle have flow passages which respectively communicate with the jet ports corresponding to the respective functions.

In this exemplary embodiment, the description has been made by taking the configuration where the nozzle portion is provided with flow passages communicating respectively with the buttock wash water jet port, the bidet wash water jet port. and the nozzle cleaning water jet port so that a flow passage communicates with a water jet port as an example. However, the present invention is not limited to such a configuration. For example, a configuration can be provided where a plurality of flow passages communicate with a jet port. With such a setting, it is possible to change a wash water jet mode so that the wash effect can be improved. To be more specific, a configuration can be adopted where two flow passages, i.e. a direct jet flow passage and a swirl flow passage communicate with the buttock wash water jet port.

In that exemplary embodiment, the description has been made by taking the configuration where the flow regulating valve is provided with the stop port, the buttock flushing port corresponding to the butt flushing water flow passage, the flushing port of the bidet corresponding to the passage of the bidet wash water flow, and the nozzle cleaning port corresponding to the passage of the nozzle cleaning flow, as an example. However, the present invention is not limited to such a configuration. For example, when the number of flow steps is different from the number of ports as described above, a configuration can be adopted where ports corresponding to the flow steps are provided, respectively. With such a configuration, the flow regulating valve can adequately cope with the functions that the nozzle portion has.

Furthermore, in this exemplary embodiment, the description has been made by taking as an example the configuration where a plug portion is provided to each of the buttock flushing port and the bidet flushing port of the flow regulating valve. However, the present invention is not limited to such a configuration. For example, a configuration can be adopted where a shutter portion is provided to a single port or to all ports. Furthermore, a configuration where two shutter portions are provided to one port may be adopted instead of the configuration where one shutter portion is provided to one port. With such configurations, an optimum advantageous effect can be acquired according to a characteristic of a member constituting the washing part. To be more specific, a configuration can be adopted where two plug portions are provided to the cleaning port of the nozzle.

As described above, the sanitary wash device of the present invention includes: the plurality of jet ports for expelling the wash water; the nozzle portion provided with the plurality of flow passages communicating with the jet ports; the nozzle drive portion that is configured to advance and retract the nozzle portion between the accommodated position and the plurality of wash positions; the flow regulating valve for selectively supplying wash water to the plurality of flow passages; the water pump that is configured to supply wash water to the nozzle portion; the heat exchanger arranged upstream of the water pump and heating the wash water; the operative part; and the control part. The plurality of flow passages include at least: the buttock wash water flow passage which communicates with the butt wash water jet port; the bidet wash water flow passage communicating with the bidet wash water jet port; and the nozzle cleaning flow passage communicating with the nozzle cleaning water jet port. When a washing operation, that is, a buttock washing and bidet washing, is performed by the operating part, the control part drives the water pump and the heat exchanger and at the same time switches the flow paths so that one of the butt wash water flow path and the bidet wash water flow path are selected by the flow regulating valve, and the hot water heated by the heat exchanger is supplied to the flow path selected for a predetermined time. Then, after a predetermined time elapses, the selection of the flow path by the flow regulating valve is switched to the cleaning flow path of the nozzle, and at the same time, the drive part of the nozzle is driven to make advancing the nozzle portion to one of the plurality of wash positions from an accommodated position. Furthermore, the control part is configured to switch the flow step to one of the butt wash water flow step and the bidet wash water flow step corresponding to a washing operation selected by the operating part by the flow regulating valve at a point in time that the nozzle portion reaches one of the plurality of wash positions.

With such a configuration, firstly, when the washing operation is performed, the drive of the water pump and the heat exchanger is started in a state where the nozzle part is in an accommodated position. Then, during a period where the nozzle part advances to the flushing position and an intimate part flushing operation is performed, the water pump and heat exchanger are continuously operated. Accordingly, it is possible to suppress the lowering of the temperature of the nozzle portion and of the washing water in the course of movement of the nozzle portion. Simultaneously, the washing water that is heated in the heat exchanger immediately after the supply of electricity to the heat exchanger and having an unstable discharge temperature is prevented from being intentionally expelled into the human body, and the washing water is discharged as wash water to clean the nozzle portion. Accordingly, in the wash position, the wash water ejected from the butt wash water jet port or the bidet wash water jet port can be ejected with a stable hot water temperature from the start of the jet. in a state where the washing water is hot enough. As a result, it is possible to realize a sanitary washing device capable of comfortable washing.

The flow regulating valve of the sanitary flushing device of the present invention may have a simultaneous supply function of supplying flushing water to both the nozzle cleaning flow passage and the buttock flushing water flow passage or the passage bidet wash water flow rate simultaneously in the course of switching operation between the nozzle cleaning flow step and the buttock wash water flow step or the bidet wash water flow step.

With such a configuration, it is possible to alleviate a change in the resistance of the flow path at the time of changing the flow path. Accordingly, it is possible to delicately perform the switching of the flow path by avoiding inadvertently applying a load to the continuously driven water pump and heat exchanger. As a result, the sanitary washing device can heat and supply washing water stably.

The flow regulating valve of the sanitary flushing device of the present invention includes at least the buttock flushing port for supplying flushing water to the butt flushing water flow passage, the bidet flushing port for supplying flushing water to the bidet wash water flow passage, the nozzle cleaning port for supplying wash water to the nozzle cleaning flow passage, and the stop port for stopping the wash water supply. In addition, at least one of the buttock flush port, the bidet flush port, and the nozzle flush port may have a shutter portion that suppresses the flow rate of flushing water to be delivered.

With such a configuration, it is possible to alleviate a change in the resistance of the flow passage of the flow regulating valve at the time of switching the port. Accordingly, it is possible to make a flow rate of washing water more stable at the time of switching the port. Accordingly, a temperature of the washing water can be stabilized and, at the same time, it is possible to prevent the flow passage member from being damaged with greater certainty.

Industrial application capacity

According to the present invention, the washing water at a set temperature can be expelled immediately after starting the washing, and therefore the present invention is also applicable to the use of washing apparatuses provided with another heat exchanger in addition to the device. sanitary washing.

Reference marks in drawings

100 sanitary washing device

110 toilet bowl

120 deodorizing device

130 control part

200 body

201 rear body shell

210 operative part

211 infrared receiver

220 operation switch

221 butt wash switch

222 nozzle cleaning switch

230 setting switch

231 hot water temperature switch

232 toilet seat temperature switch

233 8-hour heating stop switch

234 power saving switch

235 automatic toilet lid open / close switch 240 lampshade lamp

300 toilet seat

320 toilet seat

360 toilet seat and toilet lid swivel mechanism 400 remote control

401 remote control body

402 transmitting part

410 butt wash switch

411 bidet wash switch

412 stop switch

413 motion wash switch

414 wash in rhythm switch

415 wash power switch

416 wash position switch

417 sterilization switch for nozzles

418 toilet lid switch

419 toilet seat switch

421 force display lamp

422 position display lamp

450 human body detection sensor

500 wash part

501 chassis

501st water pump mounting portion

501b leg portion

502 connecting tube

510 water supply connection port

511 filter

512 check valve

513 constant flow regulating valve

514 electromagnetic water stop valve

515 release valve

516 water pump

516th engine part

516b link mechanism part

516c piston part

516d water suction port

e water discharge port

subtank

water inlet port

water outlet port

port open to the atmosphere

tank body

front tank

rear tank

portion open to the atmosphere

shock absorber portion

dividing wall

water inlet tank

1st top surface opening portion

storage tank

barrier wall

flow straightening rib

water level detection sensor

common electrode

water level electrode

upper limit electrode

lower limit electrode

heat exchanger

, 872 housing

flat plate heater

hot water inlet member

front surface member

water inlet port

hot water outlet port

water inlet passage

groove

heating flow step

dividing rib

, 874a water passage hole

outgoing

rear surface member

hot water outlet temperature sensor

excessively elevated temperature sensor

intermediate tank

nozzle device

mouthpiece cap

connecting pipe

support portion

bottom side portion

sloping portion

vertical side portion

guide rail

support guide

retention portion

water supply board

mouthpiece portion

nozzle body

buttock wash part

bidet wash part

nozzle cleaning portion

butt wash water jet port (jet port) buttock wash water flow pass (flow pass) to straightening plate

bidet flushing water jet port (jet port) bidet flushing water flow passage (flow passage) nozzle cleaning jet port (jet port) nozzle cleaning flow passage (flushing passage) flow) nozzle cover

nozzle cover body

connecting member

connection part

to connection outgoing

jet opening

water discharge port

connection portion

connection receiving portion

a front recessed portion

b rear lowered portion

nozzle drive part

flexible stand

gear pinion

drive motor

flow regulating valve

fixed disk

mobile disk

b bearing hole

stepper motor

stop port

nozzle cleaning port

buttock flush port

a, 879th water passage portion

b, 879b shutter portion

bidet flush port

wash water supply step

Claims (3)

1. A sanitary washing device comprising: a plurality of jet ports (834, 836, 838) for expelling wash water; a nozzle portion (820) provided with a plurality of flow passages (835, 837, 839) communicating with the jet ports (834, 836, 838); a nozzle drive portion (860) configured to advance and retract the nozzle portion (820) between an accommodated position and a plurality of wash positions; a flow regulating valve (870) for selectively supplying wash water to the plurality of flow passages (835, 837, 839); a water pump (516) configured to supply wash water to the nozzle portion (820); a heat exchanger (700) arranged upstream of the water pump (516) and heating the wash water; an operation part (210); and a control part (130), in which The plurality of flow passages (835, 837, 839) include at least: a butt wash water flow passage (835) communicating with a butt wash water jet port (834); a bidet wash water flow passage (837) communicating with a bidet wash water jet port (836); and a nozzle cleaning flow passage (839) communicating with a nozzle cleaning water jet port (838), The control part (130) is configured, when the operation part (210) performs a washing operation that is buttock washing and bidet washing, to drive the water pump (516) and the heat exchanger (700) and, at the same time, switching the flow steps (835, 837, 839) so that one of the buttock wash water flow step (835) and the butt wash water flow step (837) are selected. bidet by flow regulating valve (870), and to supply hot water heated by the heat exchanger (700) to the selected flow path (835, 837) for a predetermined time, in which the nozzle portion (820) is in a accommodated position; The control part (130) is configured, after the predetermined time, to switch the selection of the flow path by the flow regulating valve (870) to the nozzle cleaning flow path (839), and to actuate the part ( 860) nozzle drive to advance the nozzle portion (820) to one of a plurality of wash positions corresponding to the wash operation selected by the operating part (210) from the accommodated position while the pump (516) ) water and heat exchanger (700) are continuously driven, and The control portion (130) is configured, at the point of time that the nozzle portion (820) reaches one of the plurality of wash positions, to switch the flow path to one of the flow path (835). buttock washing water and the bidet washing water flow step (837) corresponding to the washing operation selected by the operation part (210) using the flow regulating valve (870). The sanitary flushing device according to claim 1, wherein the flow regulating valve (870) has a simultaneous supply function of supplying flushing water to both the nozzle cleaning flow passage (839) and the Buttock wash water flow step (835) or nozzle cleaning flow step (839) and bidet wash water flow step (837) simultaneously in a switching operation course between step ( 839) of nozzle cleaning flow and the butt wash water flow passage (835), or between the nozzle cleaning flow passage (839) and the bidet wash water flow passage (837) . 3. The sanitary washing device according to any one of claims 1 and 2, characterized in that the flow regulating valve (870) includes at least: a buttock wash port (878) for supplying wash water to the buttock wash water flow passage (835); a bidet wash port (879) for supplying wash water to the bidet wash water flow passage (837); a nozzle cleaning port (877) for supplying wash water to the nozzle cleaning flow passage (839); and a stop port (876) to stop the wash water supply, and At least one of the buttock flushing port (878), the bidet flushing port (879) and the nozzle flushing port (877) has a plug portion (878b, 879b) configured to suppress a flow rate of water from wash to be supplied.