JP2008223467A - Sanitary washing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sanitary washing device capable of sufficiently preventing the adhesion of soil to a toilet bowl. <P>SOLUTION: This sanitary washing device comprises piping 3, a heat exchanger 9, piping 10 and a nozzle portion 20. Washing water, which is supplied from water service piping 1, is supplied to the nozzle portion 20 via the piping 3, the heat exchanger 9 and the piping 10. A toilet bowl nozzle 40 is connected to the piping 3 via pieces 30 and 32 of branch piping. The washing water in the piping 3 is partially supplied to the toilet bowl nozzle 40 via the pieces 30 and 32 of branch piping. The washing water is radially jetted from the side of the leading end of the toilet bowl nozzle 40. A toilet bowl nozzle cover is provided on the front side of the toilet bowl nozzle 40. The toilet bowl nozzle cover can inhibit the forward scattering of the washing water jetted from the toilet bowl nozzle 40, and can make the washing water repelled toward the toilet bowl nozzle 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sanitary washing device.

  Conventionally, various sanitary washing apparatuses have been developed in order to prevent filth from adhering to the toilet bowl (see, for example, Patent Document 1).

In the sanitary washing device described in Patent Literature 1, when a person is seated on the toilet seat, washing water is discharged from the pre-washing nozzle toward the inner surface of the toilet bowl. Thereby, the inner surface of the toilet is wetted by the washing water, and the filth is prevented from adhering to the toilet.
JP-A-7-189319

  By the way, in the sanitary washing apparatus described in Patent Document 1, since the washing water is discharged from the pre-washing nozzle in a state where a person is seated on the toilet seat, the washing water may adhere to the human body. In order to prevent the cleaning water from adhering to the human body, it is necessary to stop the discharge of the cleaning water from the pre-cleaning nozzle or reduce the discharge amount of the cleaning water.

  However, in the configuration of the above-described sanitary cleaning device, when the discharge of the cleaning water is stopped or the discharge amount is reduced, the filth easily adheres to the pre-cleaning nozzle. When filth adheres to the pre-cleaning nozzle, the adhered filth may scatter with the washing water during pre-cleaning and adhere to the toilet. That is, with the configuration of the sanitary washing device described above, it is not possible to sufficiently prevent filth from adhering to the toilet bowl.

  The objective of this invention is providing the sanitary washing apparatus which can fully prevent that filth adheres to a toilet bowl.

  (1) A sanitary washing apparatus according to the present invention is a sanitary washing apparatus that supplies cleaning water supplied from a supply source to a human body, and a body jet part for jetting cleaning water to the human body, and the cleaning water at the front part And a toilet flushing part that jets into a toilet having a rear part, and a first flow passage that is provided between the supply source and the human jet part and circulates wash water supplied from the supply source to the human jet part, A second flow path connected to the first flow path and circulating the wash water in the first flow path to the toilet flushing section, and heating the wash water provided in the first flow path and supplied from a supply source A toilet nozzle, and a toilet nozzle is provided at least in front of the toilet nozzle on the rear side of the toilet, and a toilet nozzle that jets flush water radially toward the inner surface of the toilet on the rear side of the toilet Member.

  In this sanitary washing apparatus, the wash water supplied from the supply source is supplied to the human body ejection portion via the first flow passage, and the wash water is ejected from the human body ejection portion to the human body. Thereby, the local part of the human body is washed.

  Moreover, the 1st flow path is provided with the heat exchanger which heats wash water. Thereby, the washing water heated by the heat exchanger can be ejected from the human body ejection part to the human body.

  In addition, a part of the wash water in the first flow passage is supplied to the toilet jet unit by the second flow passage. Then, the washing water is ejected radially from the toilet nozzle of the toilet flushing portion toward the inner surface of the toilet. Thereby, since the inner surface of a toilet bowl can be wetted with washing water, it is possible to prevent filth from adhering to the toilet bowl.

  In addition, since the shielding member is provided at least on the front side of the toilet nozzle, when the excrement (dirt) is scattered during the user's excretion, the scattered excrement is directly attached to the front side of the toilet nozzle. Can be prevented. Moreover, even when a user's excrement hits the toilet bowl and is scattered, the excrement and water containing the excrement can be prevented from adhering to the front side of the toilet nozzle. Thereby, when flushing water is ejected from the toilet nozzle, it is possible to prevent the filth from being ejected together with the flushing water from the toilet nozzle. As a result, it is possible to sufficiently prevent filth from adhering to the toilet bowl.

  (2) The toilet nozzle and the shielding member have a first state in which splashing of the washing water ejected from the toilet nozzle is prevented by the shielding member and a second state in which forward scattering is not inhibited by the shielding member. May be selectively settable.

  In this case, by flushing the wash water from the toilet nozzle in the first state, the rear side of the inner surface of the toilet is wetted by the wash water ejected radially from the toilet nozzle while preventing the splash of the wash water to the front. be able to. Thereby, even when the user is using the sanitary washing device, it is possible to prevent filth from adhering to the toilet while preventing the washing water from adhering to the user.

  Moreover, by flushing the wash water from the toilet nozzle in the second state, the wide area of the inner surface of the toilet bowl can be sufficiently wetted by the wash water ejected radially from the toilet nozzle. Therefore, before the user uses the sanitary washing device, the washing water is ejected from the toilet nozzle in the second state, thereby sufficiently preventing the filth from adhering to the toilet bowl.

  (3) The second flow path may be connected to the first flow path on the upstream side of the heat exchanger. In this case, the second flow passage can be used as a waste water circuit while supplying the wash water to the toilet nozzle through the second flow passage. Thereby, the water circuit configuration can be simplified.

  (4) The sanitary washing device may further include a water stop solenoid valve that switches a supply state of the wash water supplied from the supply source.

  (5) The human body ejection section includes a plurality of nozzles and a switching valve that switches a supply state of the cleaning water to the plurality of nozzles, and the switching valve can stop the supply of the cleaning water from the supply source to the plurality of nozzles. May be provided.

  In this case, since a sufficient amount of wash water can be supplied to the toilet nozzle, the toilet can be sufficiently wetted with the wash water. Thereby, it is possible to sufficiently prevent filth from adhering to the toilet bowl.

  ADVANTAGE OF THE INVENTION According to this invention, it can fully prevent that filth adheres to a toilet bowl.

<1> Appearance of sanitary washing device and toilet device provided with the same FIG. 1 is an external perspective view showing a sanitary washing device and a toilet device provided therewith according to an embodiment of the present invention. The toilet apparatus 1000 is installed in a toilet room.

  In the toilet apparatus 1000, the sanitary washing apparatus 100 is attached to the toilet bowl 700. The sanitary washing device 100 includes a main body 200, a remote operation device 300, a toilet seat 400 and a lid 500. Each component of the sanitary washing device 100 excluding the lid 500 constitutes a toilet seat device 110 described later.

  A toilet seat 400 and a lid 500 are attached to the main body 200 so as to be openable and closable. The main body 200 is provided with a cleaning water supply mechanism (not shown) and a control unit 90 (FIG. 3) described later.

  In FIG. 1, a seating sensor 610 provided in the upper front portion of the main body 200 is shown. The seating sensor 610 is, for example, a reflective infrared sensor. In this case, the seating sensor 610 detects the presence of a user on the toilet seat 400 by detecting infrared rays reflected from the human body.

  Further, FIG. 1 shows a state in which the toilet nozzle 40 provided at the lower front portion of the main body 200 protrudes inside the toilet 700. The toilet nozzle 40 is connected to the above-described washing water supply mechanism.

  The washing water supply mechanism is connected to a water pipe (not shown). Accordingly, the cleaning water supply mechanism supplies the cleaning water supplied from the water pipe to the toilet nozzle 40. Thereby, washing water is ejected from the toilet nozzle 40 to a wide area on the inner surface of the toilet 700 (toilet bowl pre-washing). Alternatively, washing water is ejected from the toilet nozzle 40 to the back side of the inner surface of the toilet 700 (toilet rear cleaning). Details will be described later.

  The cleaning water supply mechanism is connected to a nozzle unit 20 (FIG. 3) described later. Accordingly, the cleaning water supply mechanism supplies the cleaning water supplied from the water pipe to the nozzle unit 20. Thereby, washing water is ejected from the nozzle part 20 to a user's local part.

  The remote operation device 300 is provided with a plurality of switches. The remote control device 300 is attached to a place where a user sitting on the toilet seat 400 can operate, for example.

  The entrance detection sensor 600 is attached to an entrance of a toilet room or the like. The entrance detection sensor 600 is, for example, a reflective infrared sensor. In this case, the entrance detection sensor 600 detects that the user has entered the toilet room when detecting infrared rays reflected from the human body.

  The control unit 90 (FIG. 3) of the main body 200 controls the operation of each part of the sanitary washing device 100 based on signals transmitted from the remote operation device 300, the room entry detection sensor 600 and the seating sensor 610.

<2> Configuration of Remote Operation Device FIG. 2 is a front view of the remote operation device 300 of FIG. The remote operation device 300 has a structure in which a controller lid 302 is provided at the bottom of the controller main body 301 so as to be freely opened and closed.

  As shown in FIG. 2A, a drying switch 320, strength adjustment switches 322 and 323, and position adjustment switches 325 and 326 are provided on the top of the controller main body 301 with the controller lid 302 closed. The controller lid 302 is provided with a stop switch 311, a butt switch 312 and a bidet switch 313.

  The above switches are operated by the user. Thereby, a predetermined signal corresponding to each switch is wirelessly transmitted from the remote operation device 300 to the main body 200 of FIG. The control unit 90 (FIG. 3) of the main body 200 controls the operation of each component of the main body 200 (FIG. 1) and the toilet seat 400 (FIG. 1) based on the received signal.

  For example, when the user operates the buttocks switch 312 or the bidet switch 313, cleaning water is ejected from a nozzle unit 20 (FIG. 3), which will be described later, to the user's local area. Further, when the user operates the stop switch 311, the ejection of the washing water from the nozzle unit 20 to the user's local part is stopped.

  When the user operates the drying switch 320, hot air is jetted from a drying unit 210 (FIG. 64), which will be described later, to the user's local area. Further, when the user operates the strength adjustment switches 322 and 323, the flow rate, pressure, and the like of the cleaning water sprayed to the local area of the user are adjusted.

  Further, when the user operates the position adjustment switches 325 and 326, the position of the posterior nozzle 21 (FIG. 3) described later or the bidet nozzle 22 (FIG. 3) described later is adjusted. Thereby, the ejection position of the washing water to the user's local area is adjusted.

  FIG. 2B shows a front view of the remote operation device 300 in a state where the controller lid 302 is opened. As shown in FIG. 2B, in addition to the stop switch 311, the butt switch 312, and the bidet switch 313, an automatic opening / closing switch 331, a water temperature adjustment is provided below the controller body 301 covered by the controller lid 302. A switch 332, a toilet seat temperature adjustment switch 333, a sterilization switch 335, and a toilet flushing switch 336 are provided.

  Even when these switches are operated, a predetermined signal corresponding to each switch is wirelessly transmitted from the remote operation device 300 to the main body 200. Thereby, the control part 90 of the main-body part 200 controls operation | movement of each structure part of the main-body part 200 and the toilet seat part 400 based on the received signal.

  The automatic opening / closing switch 331 is constituted by a knob. When the user operates the knob of the automatic opening / closing switch 331, the opening / closing operation of the lid 500 (FIG. 1) is set. That is, when the knob of the automatic opening / closing switch 331 is in the ON position, the lid 500 is opened / closed in response to the user entering the toilet room.

  When the user operates the water temperature adjustment switch 332, the temperature of the cleaning water ejected from the nozzle unit 20 to the user's local part is adjusted. When the user operates the toilet seat temperature adjustment switch 333, the temperature of the toilet seat 400 is adjusted.

  Further, when the user operates the sterilization switch 335, the cleaning water containing silver ions flows into the cleaning water supply mechanism of the main body 200, and the sterilization operation is performed.

  Similar to the automatic opening / closing switch 331, the toilet flushing switch 336 is constituted by a knob. When the user operates the knob of the toilet flushing switch 336, the operation of the toilet pre-washing and the toilet rear washing by the toilet nozzle 40 is set.

  In other words, when the knob of the toilet flushing switch 336 is in the ON position, flush water is ejected from the toilet nozzle 40 to a wide area inside the toilet 700 according to the user entering the toilet room. In addition, washing water is jetted from the toilet nozzle 40 to the back side of the inner surface of the toilet 700 while the user is seated on the toilet seat 400.

<3> Configuration of Water Supply System and Control System in Main Body FIG. 3 is a schematic diagram showing the configuration of the main body 200. As shown in FIG. 3, the main body 200 includes a branch faucet 2, a strainer 4, a check valve 5, a constant flow valve 6, a water stop solenoid valve 7, a flow sensor 8, a heat exchanger 9, a pump 11, and a buffer tank. 12, human body switching valve 13, nozzle unit 20, vacuum breakers 31, 61, toilet nozzle 40, toilet nozzle motor 40m, lamp 50, and control unit 90.

  The nozzle unit 20 includes a buttocks nozzle 21, a bidet nozzle 22, and a nozzle cleaning nozzle 23, and the human switching valve 13 includes a switching valve motor 13m.

  As shown in FIG. 3, a branch tap 2 is inserted in the water pipe 1. A strainer 4, a check valve 5, a constant flow valve 6, a water stop electromagnetic valve 7, and a flow sensor 8 are inserted in order in the pipe 3 connected between the branch faucet 2 and the heat exchanger 9. A pump 11 and a buffer tank 12 are inserted in a pipe 10 connected between the heat exchanger 9 and the human body switching valve 13.

  A butt nozzle 21, a bidet nozzle 22 and a nozzle cleaning nozzle 23 are respectively connected to a plurality of ports of the switching valve 13 for human body.

  The vacuum breaker 31 is connected to a branch pipe 30 extending from the pipe 3 between the water stop solenoid valve 7 and the flow rate sensor 8, and is disposed at a position above the washing water outlet of the heat exchanger 9 and the toilet nozzle 40. The One end of a branch pipe 32 is connected to the vacuum breaker 31. The branch pipe 30 and the branch pipe 32 are connected via a vacuum breaker 31. The toilet nozzle 40 is connected to the other end of the branch pipe 32. The toilet nozzle motor 40 m and the lamp 50 are attached in the vicinity of the toilet nozzle 40. The vacuum breaker 61 is provided in the buffer tank 12 and is disposed at a position above the heat exchanger 9. The vacuum breaker 61 and the buffer tank 12 are integrally formed. Therefore, the buffer tank 12 is also arranged at a position above the heat exchanger 9.

  Next, the flow of cleaning water in the main body 200 and the control of each component of the main body 200 by the controller 90 will be described.

  The purified water flowing through the water pipe 1 is supplied to the strainer 4 by the branch tap 2 as washing water. Thereby, the dust, impurities, etc. contained in the washing water are removed by the strainer 4.

  Next, the check valve 5 prevents the backflow of the wash water in the pipe 3, and the constant flow valve 6 keeps the flow rate of the wash water flowing in the pipe 3 constant. Then, the supply state of the washing water to the heat exchanger 9 is switched by the water stop solenoid valve 7. The operation of the water stop solenoid valve 7 is controlled by the control unit 90.

  In the pipe 3, the flow sensor 8 measures the flow rate of the cleaning water flowing in the pipe 3 and gives the measured flow value to the control unit 90. The heat exchanger 9 heats the washing water supplied through the pipe 3 to a predetermined temperature. The operation of the heat exchanger 9 is controlled by the control unit 90 based on the measured flow rate value measured by the flow sensor 8.

  Subsequently, the wash water heated by the heat exchanger 9 is pumped by the pump 11 through the buffer tank 12 to the human body switching valve 13. The operation of the pump 11 is controlled by the control unit 90.

  The buffer tank 12 acts as a temperature buffer for heated washing water. Thereby, generation | occurrence | production of the temperature nonuniformity of the wash water pumped by the switching valve 13 for human bodies is suppressed. The total capacity of the heat exchanger 9 and the buffer tank 12 is preferably 15 cc to 30 cc, and more preferably 20 cc to 25 cc.

  In the human body switching valve 13, the cleaning water pumped from the pump 11 is supplied to any one of the buttocks nozzle 21, the bidet nozzle 22, and the nozzle cleaning nozzle 23 by operating the switching valve motor 13 m. As a result, cleaning water is ejected from any one of the buttocks nozzle 21, the bidet nozzle 22, and the nozzle cleaning nozzle 23. The operation of the switching valve motor 13m is controlled by the control unit 90.

  The buttocks nozzle 21 and the bidet nozzle 22 are used for cleaning the user's local area. The nozzle cleaning nozzle 23 is used for cleaning portions of the buttocks nozzle 21 and the bidet nozzle 22 that protrude into the toilet bowl 700.

  Of the wash water supplied from the water stop solenoid valve 7 to the heat exchanger 9, excess wash water that is not used in the nozzle portion 20 is discarded as waste water through the branch pipe 30, the branch pipe 32, and the toilet nozzle 40. 1). That is, the branch pipe 30 and the branch pipe 32 function as a waste water circuit. Details of the toilet nozzle 40 will be described later.

  In this example, a vacuum breaker 31 is provided between the heat exchanger 9 and the toilet nozzle 40, and a vacuum breaker 61 is provided between the heat exchanger 9 and the nozzle portion 20. Thereby, the wash water in the heat exchanger 9 is prevented from flowing out through the branch pipe 30, the branch pipe 32 and the toilet nozzle 40 and from the outside through the pipe 10 and the nozzle unit 20. . As a result, the emptying of the heat exchanger 9 is prevented.

  Further, the vacuum breaker 31 prevents backflow of sewage and the like from the toilet nozzle 40 side, and the vacuum breaker 61 prevents backflow of sewage and the like from the nozzle portion 20 side.

  In addition, since the buffer tank 12 and the vacuum breaker 61 are integrally provided, the main body 200 can be reduced in size. Further, since the cold water in the buffer tank 12 is discharged by the vacuum breaker 61, it is possible to prevent the cold water from being ejected from the butt nozzle 21 during butt washing.

<4> Configuration and Operation of Toilet Nozzle (4-a) General Description of Toilet Nozzle Next, the toilet nozzle 40 will be described. FIG. 4 is a longitudinal sectional view of the sanitary washing device 100. As shown in FIG. 4, the toilet nozzle 40 is disposed at a position near the nozzle portion 20 at the lower portion of the main body portion 200, and the tip portion thereof is located inside the toilet bowl 700. In the vicinity of the toilet nozzle 40, a lamp 50 made of an LED (light emitting diode) or the like is provided.

  In the following, as shown in FIG. 4, each part will be described with the main body 200 side of the sanitary washing device 100 as the rear and the front end side of the toilet seat 400 as the front.

  A toilet nozzle cover 40K is provided so as to cover the front side of the toilet nozzle 40 and the lamp 50 provided in the vicinity thereof. The toilet nozzle cover 40K is formed of a transparent resin. Thereby, when the lamp 50 emits light, the light is irradiated into the toilet 700 through the toilet nozzle cover 40K.

  FIG. 5 is an enlarged cross-sectional view for explaining the toilet nozzle 40 of FIG. 4 and the surrounding structure. As shown in FIG. 5, the toilet nozzle 40 has a structure in which a rod-like jet forming member 42 is inserted into the distal end portion of a cylindrical toilet nozzle main body 41. Inside the toilet nozzle main body 41, a gap is formed between the inner surface of the toilet nozzle main body 41 and the outer peripheral surface of the jet forming member 42. A connecting pipe 44 that constitutes a part of the branch pipe 32 of FIG. 3 is connected to the rear end of the toilet nozzle body 41.

  As a result, when wash water (waste water) is supplied from the connecting pipe 44 (branch pipe 32) to the toilet nozzle body 41, the wash water flows into the inner surface of the toilet nozzle body 41 and the outer peripheral surface of the jet forming member 42. Is ejected from the front end portion of the toilet nozzle 40 through the gap therebetween.

  One end of the rotating piece 43 is fixed to the rear end portion of the toilet nozzle main body 41. The other end of the rotating piece 43 is connected to a toilet nozzle motor 40m fixed to a main body lower casing 200A described later. Thereby, if the toilet nozzle motor 40m operates, the front-end | tip part of the toilet nozzle main-body part 41 will rotate.

  Here, when the toilet nozzle 40 is on standby, that is, when the user has not entered the toilet room, the tip of the toilet nozzle 40 is positioned so as to be close to the inner surface of the toilet nozzle cover 40K. Hereinafter, the position of the toilet nozzle 40 is referred to as a storage position.

  In this state, when the entrance detection sensor 600 in FIG. 1 detects that the user has entered the toilet room, the toilet nozzle motor 40m operates. Thereby, the front-end | tip part of the toilet nozzle 40 rotates in the direction shown by the arrow A of FIG. And the above-mentioned toilet pre-washing is started.

  FIG. 6 is a longitudinal section of the sanitary washing device 100 at the time of toilet pre-washing, and FIG. 7 is an enlarged sectional view for explaining the toilet nozzle 40 in the state of FIG. 6 and the surrounding structure.

  First, as shown in FIGS. 6 and 7, when the user enters the toilet room and the front end of the toilet nozzle 40 is rotated, the front end moves below the toilet nozzle cover 40K, and the toilet bowl is moved. It is positioned so as to be exposed to the internal space of 700. Hereinafter, the position of the toilet nozzle 40 is referred to as a toilet cleaning position.

  In this state, cleaning water is supplied from the connecting pipe 44 to the toilet nozzle body 41. Thereby, washing water is ejected from the tip of the toilet nozzle 40.

  The wash water ejected from the toilet nozzle 40 is ejected radially in a direction substantially perpendicular to the axis of the toilet nozzle 40.

  As a result, as shown in FIG. 6, the wash water is ejected over a wide area on the inner surface centering on the waste outlet 700 </ b> D of the toilet 700. As a result, the inner surface of the toilet 700 that is dry when the user enters the toilet room is wetted by the cleaning water.

  At this time, the lamp 50 emits light, so that the user can visually recognize that the toilet pre-cleaning is being performed.

  As described above, the wetness of the inner surface of the toilet bowl 700 before use prevents the dirt from adhering to the inner surface of the toilet bowl 700.

  As will be described later, the toilet pre-cleaning operation is stopped when a predetermined time elapses, the user is seated on the toilet seat 400, or the user operates the remote control device 300.

  At the end of the toilet pre-washing, the toilet nozzle motor 40m operates again. Thereby, the front-end | tip part of the toilet nozzle 40 moves inside the toilet nozzle cover 40K again, and adjoins the inner surface of the toilet nozzle cover 40K. That is, after the toilet bowl pre-washing, the toilet nozzle 40 moves to the storage position again. At this time, the wash water is continuously ejected from the tip of the toilet nozzle 40. Thereby, toilet back washing | cleaning is started.

  At the time of toilet rear cleaning, as shown by arrows B and C in FIG. 4, the wash water ejected from the toilet nozzle 40 to the inner surface on the rear side of the toilet 700 collides with the inner surface and flows down in the toilet 700.

  This reliably prevents filth from adhering to the inner surface on the rear side of the toilet 700 when the user uses the toilet apparatus 1000.

  At this time, the washing water sprayed from the toilet nozzle 40 to the inner surface of the toilet nozzle cover 40K collides with the inner surface of the toilet nozzle cover 40K and rebounds to the tip of the toilet nozzle 40. Thereby, the front-end | tip part of the toilet nozzle 40 is wash | cleaned, and the contamination of the front-end | tip part of the toilet nozzle 40 is prevented.

  Thereafter, for example, when the user stands up from the toilet seat 400, the toilet rear cleaning is stopped. That is, the ejection of the washing water from the toilet nozzle 40 is stopped.

(4-b) Details of Structure of Toilet Nozzle Here, details of the structure of the tip of the toilet nozzle 40 will be described. FIG. 8 is a cross-sectional view showing the structure of the tip of the toilet nozzle 40 of FIG. FIG. 8A shows a longitudinal sectional view at the tip of the toilet nozzle 40, and FIG. 8B shows a sectional view taken along line C14-C14 of FIG. 8A.

  As shown in FIG. 8A, the jet forming member 42 is inserted into the inside of the front end opening 41h of the toilet nozzle main body 41. The jet forming member 42 has an insertion shaft portion 42a. As shown in FIG. 8B, the insertion shaft portion 42a is formed with three blade members 42b extending radially outward from the shaft center. A large-diameter portion 42c, an enlarged portion 42d, and a flange portion 42e are formed from the blade member 42b toward the tip of the jet forming member 42.

  The diameter of the large diameter portion 42c is larger than the diameter of the insertion shaft portion 42a. Further, the enlarged portion 42d gradually becomes larger in diameter toward the tip of the jet forming member 42, and the diameter of the tip of the jet forming member 42 is larger than the diameter of the tip opening 41h. In addition, the outer diameter of the flange portion 42 e is larger than the outer diameter of the toilet nozzle main body portion 41.

  A step portion 41 d is formed on the inner surface of the toilet nozzle body 41. When the jet forming member 42 is inserted into the toilet nozzle main body 41, the stepped portion 41d and the blade member 42b of the jet forming member 42 come into contact with each other. At this time, the blade member 42 b acts as a spacer between the jet forming member 42 and the toilet nozzle main body 41. Thereby, the jet flow forming member 42 is positioned inside the toilet nozzle main body 41.

  In this state, the large-diameter portion 42 c of the jet flow forming member 42 protrudes from the distal end opening 41 h of the toilet nozzle main body 41, and the enlarged portion 42 d and the flange portion 42 e are located outside the toilet nozzle main body 41.

  The outer diameters of the insertion shaft portion 42 a and the large diameter portion 42 c are smaller than the inner diameter of the toilet nozzle main body 41. Therefore, a gap is formed between the inner surface of the toilet nozzle main body 41 and the outer peripheral surface of the jet forming member 42 as described above. This gap becomes the washing water flow path 41s.

  When the cleaning water is supplied from the connection pipe 44 in FIG. 5, the cleaning water is ejected from the tip opening 41h through the flow path 41s. At this time, the washing water is ejected to the outside along the outer peripheral surfaces of the large diameter portion 42c and the enlarged portion 42d. That is, the wash water is ejected radially in a direction substantially perpendicular to the axis of the toilet nozzle 40.

(4-c) Jet water flow velocity at the time of toilet pre-washing FIG. 9 is a diagram showing the relationship between the jet flow velocity of the wash water ejected from the toilet nozzle 40 of FIG. 4 and the spread width.

  First, the ejection flow velocity and the spreading width will be described. FIG. 9A shows a diagram for explaining the definitions of the ejection flow velocity and the spreading width.

  FIG. 9A shows a state in which the washing water is ejected from the toilet nozzle 40 arranged so that the axis is parallel to the vertical direction.

  Here, the ejection flow rate refers to the flow rate of the washing water ejected in the horizontal direction from the tip of the toilet nozzle 40 as indicated by the arrow WV. Further, the spread width refers to the outer diameter of the region where the wash water is supplied 100 mm below the toilet nozzle 40 as indicated by an arrow WW.

  FIG. 9B shows an experimental result in the case where washing water is ejected from the toilet nozzle 40. In FIG. 9B, the vertical axis represents the cleaning water spreading width WW, the horizontal axis represents the cleaning water ejection flow rate, and the solid line represents the relationship between the spreading width WW and the ejection flow velocity.

  As shown in FIG. 9B, when the washing water ejection flow rate is greater than 2 m / s, the spreading width is greater than 200 mm. In this case, since wash water can be supplied to a sufficiently wide area on the inner surface of the toilet bowl 700, it is possible to sufficiently prevent filth from adhering to the inner surface of the toilet bowl 700.

  Moreover, when the jetting flow velocity of washing water is made smaller than 10 m / s, the spreading width becomes smaller than 1000 mm. In this case, it is possible to prevent the washing water from splashing outside the toilet bowl 700. Moreover, it is possible to prevent the washing water ejected from the toilet nozzle 40 from greatly rebounding on the inner surface of the toilet bowl 700 by making the ejection flow rate of the washing water smaller than 10 m / s. Thereby, it is possible to sufficiently prevent the washing water from splashing out of the toilet bowl 700.

  Therefore, by setting the ejection speed of the washing water in the range of 2 m / s to 10 m / s, it is possible to prevent the washing water from splashing outside the toilet 700 and prevent the filth from adhering to the toilet 700. It can be sufficiently prevented. In addition, it is more preferable that the ejection speed of the washing water is set in the range of 4 m / s to 8 m / s. In this case, it is possible to reliably prevent filth from adhering to the toilet bowl 700 while reliably preventing the wash water from splashing outside the toilet bowl 700.

(4-d) Operation timing and control flow of toilet pre-washing In this example, when the user enters the toilet room, the toilet pre-washing is started under the control of the control unit 90. In addition, when the user uses the toilet apparatus 1000, toilet rear cleaning is performed under the control of the control unit 90. That is, when the user is seated on the toilet seat 400 (FIG. 1), scattering of washing water from the toilet nozzle 40 (FIG. 1) to the front side is prevented. This prevents the cleaning water from adhering to the user.

  The control unit 90 performs a transition from toilet bowl pre-washing to toilet back washing based on the passage of a predetermined time, the user sitting on the toilet seat 400, or the operation of the remote control device 300 by the user.

  Here, the predetermined time is determined in advance based on an average time from when the user enters the toilet room until the user sits on the toilet seat 400. In order to determine the predetermined time, the present inventors investigated the time from when the user enters the toilet room until he / she sits on the toilet seat 400 (hereinafter referred to as “entrance sitting time”). . This survey was conducted by using a toilet room for a predetermined number of users, measuring the entrance / seating time of each user, and calculating the cumulative percentage for each entrance / seating time.

  FIG. 10 is a diagram showing the results of investigation into the room sitting time. In FIG. 10, the horizontal axis indicates the room sitting time, and the vertical axis indicates the cumulative percentage of users.

  As shown in FIG. 10, according to this survey, it is clear that many users (over 90% of users) are seated on the toilet seat 400 after about 6 seconds after entering the toilet room. became. Therefore, in this example, the predetermined time is set to 6 seconds. In this case, the transition from toilet bowl pre-cleaning to toilet rear cleaning can be performed immediately before the user is seated on the toilet seat 400. Thus, the inner surface of the toilet 700 can be sufficiently wetted before the user is seated, and the washing water ejected from the toilet nozzle 40 can be reliably prevented from adhering to the user.

  Next, the control flow of the toilet bowl cleaning process (toilet bowl pre-washing and toilet bowl rear washing) by the control unit 90 (FIG. 3) will be described.

  FIG. 11 is a diagram illustrating a control flow of toilet bowl cleaning processing by the control unit 90.

  As shown in FIG. 11, the control unit 90 first holds the toilet nozzle 40 in the storage position (position shown in FIGS. 4 and 5) by controlling the toilet nozzle motor 40m (FIG. 3) (step S1). ).

  Next, the control unit 90 determines whether or not the user has entered the toilet room based on the output signal of the entry detection sensor 600 (FIG. 1) (step S2). When the user enters the toilet room, the control unit 90 controls the toilet nozzle motor 40m to move the toilet nozzle 40 to the toilet cleaning position (the position shown in FIGS. 6 and 7) (step S3).

  Next, the control unit 90 controls the water stop solenoid valve 7 (FIG. 3), the switching valve motor 13m (FIG. 3), and the like to eject the wash water from the toilet nozzle 40 and turn on the lamp 50 (step) S4).

  Next, the control unit 90 determines whether or not a predetermined time (for example, 6 seconds) has elapsed since the user entered the toilet room (step S5). If the predetermined time has not elapsed, the control unit 90 determines whether or not the stop switch 311 (FIG. 2) has been pressed by the user (step S6).

  When the stop switch 311 is not pressed, the control unit 90 determines whether or not the user is seated on the toilet seat 400 (FIG. 1) based on the output signal of the seating sensor 610 (FIG. 1) (step). S7). When the user is not seated on the toilet seat 400, the controller 90 returns to the process of step S5.

  When it is determined in step S5 that the predetermined time has elapsed, the control unit 90 turns off the lamp 50 (step S8). Next, the controller 90 moves the toilet nozzle 40 to the storage position (the position shown in FIGS. 4 and 5) by controlling the toilet nozzle motor 40m (FIG. 3) (step S9).

  Next, the control unit 90 determines whether or not the user has stood up based on the output signal of the seating sensor 610 (FIG. 1) (step S10). When it is determined that the user has stood up, the control unit 90 controls the water stop solenoid valve 7 (FIG. 3) and the like to stop the ejection of the wash water from the toilet nozzle 40 (step S11). Thereby, the toilet bowl washing process by the control unit 90 ends.

  When it is determined in step S2 that the user has not entered the room, the control unit 90 waits until the user enters the room.

  If the stop switch 311 is pressed by the user in step S6, or if the user is seated on the toilet seat 400 in step S7, the control unit 90 proceeds to the process of step S8.

  When the user has not stood up in step S10, the control unit 90 waits until the user stands up.

  As described above, in this example, the toilet pre-cleaning is terminated when a predetermined time elapses after the user enters the toilet room. In this case, as described above, the inner surface of the toilet 700 can be sufficiently wetted before the user is seated, and the washing water ejected from the toilet nozzle 40 can be reliably prevented from adhering to the user.

  Further, when the user presses the stop switch 311 or the user sits on the toilet seat 400, the toilet pre-washing is finished. Therefore, even when the user is seated on the toilet seat 400 within the predetermined time, it is possible to prevent the washing water ejected from the toilet nozzle 40 from adhering to the user.

  In addition, when the user is seated on the toilet seat 400, toilet rear cleaning is performed. Thereby, it is possible to reliably prevent filth from adhering to the rear side of the inner surface of the toilet bowl 700.

  In the control flow of FIG. 11, after the toilet nozzle 40 has moved to the toilet cleaning position in step S3, the flushing water starts to be ejected in step S4, but before the toilet nozzle 40 moves to the toilet cleaning position, that is, stored. You may start ejecting washing water in the state hold | maintained in the position. In this case, the toilet nozzle 40 can be cleaned before the toilet pre-cleaning is performed. Thereby, contamination of the toilet nozzle 40 can be reliably prevented.

  In the control flow of FIG. 11, the toilet nozzle 40 is moved to the toilet cleaning position when the user's entry is confirmed in step S <b> 2, but the toilet nozzle 40 may be waited at the toilet cleaning position in advance. In this case, since the toilet pre-cleaning can be started quickly, a sufficient amount of cleaning water can be supplied to the toilet 700. Thereby, it can prevent more reliably that filth adheres to toilet bowl 700. FIG. When the toilet nozzle 40 is made to wait in advance at the toilet cleaning position, for example, after the user has finished using the toilet apparatus 1000, the toilet nozzle 40 may be moved to the toilet cleaning position when a predetermined time has elapsed. Good.

  Moreover, when flushing water is ejected from the toilet nozzle 40, the supply of flush water to the nozzle unit 20 (FIG. 3) may be stopped by controlling the switching valve 13 for human body. In this case, since a sufficient amount of wash water can be supplied to the toilet nozzle 40, the toilet bowl 700 can be sufficiently wetted with the wash water. As a result, it is possible to sufficiently prevent filth from adhering to the toilet bowl 700.

(4-e) Effect regarding toilet bowl cleaning process and toilet nozzle As described above, before the user sits on the toilet seat 400, toilet bowl pre-cleaning is performed. Thereby, since the substantially whole area of the inner surface of the toilet bowl 700 can be wetted with washing water, it is possible to prevent filth from adhering to the toilet bowl 700.

  In addition, when the user is seated on the toilet seat 400, toilet rear cleaning is performed. During the toilet rear cleaning, the front of the toilet nozzle 40 is shielded by the toilet nozzle cover 40K. Therefore, the back side of the inner surface of the toilet 700 can be wetted with the washing water while preventing the washing water ejected from the toilet nozzle 40 from being scattered forward. Thereby, it is possible to prevent filth from adhering to the toilet bowl 700 while preventing the washing water from adhering to the user sitting on the toilet seat 400.

  Moreover, at the time of toilet rear part washing | cleaning, it can prevent that filth adheres to the toilet nozzle 40 with the toilet nozzle cover 40K. Therefore, it is possible to prevent the filth from being ejected from the toilet nozzle 40 together with the washing water during the toilet pre-washing and the toilet rear washing. Thereby, it is possible to sufficiently prevent filth from adhering to the toilet bowl 700.

  Moreover, at the time of toilet rear cleaning, the wash water ejected from the toilet nozzle 40 rebounds at the toilet nozzle cover 40K. And the toilet nozzle 40 can be wash | cleaned with the wash water which bounced back. Thereby, it can prevent reliably that a filth adheres to the toilet nozzle 40. FIG.

  Further, when the sanitary washing device 100 is attached to the toilet bowl 700 or when the sanitary washing device 100 is transported, the toilet nozzle 40 can be held in the storage position. In this case, since the toilet nozzle 40 is covered with the toilet nozzle cover 40K, damage to the toilet nozzle 40 can be prevented.

  Moreover, the rotation angle of the front-end | tip part of the toilet nozzle 40 can be adjusted by controlling the toilet nozzle motor 40m. Thereby, the breadth WW (refer FIG. 9A) of the washing water in the toilet bowl 700 can be adjusted.

  Moreover, in this example, the toilet nozzle 40 is provided in the waste water circuit (the branch pipe 30 and the branch pipe 32). That is, in this example, since it is not necessary to provide a separate circuit for providing the toilet nozzle 40, the water circuit configuration can be simplified.

  In the above description, the toilet nozzle 40 is rotated in a direction parallel to the front-rear direction. However, the toilet nozzle 40 may be rotated in a direction parallel to the left-right direction.

(4-f) Another Structural Example of Toilet Nozzle FIG. 12 is a cross-sectional view illustrating another structural example of the toilet nozzle 40. FIG. 12A shows a longitudinal sectional view at the tip of the toilet nozzle 40, and FIG. 12B shows a sectional view taken along line C18-C18 in FIG. 12A. The toilet nozzle 40 of FIG. 12 differs from the toilet nozzle 40 of FIG. 8 in the following points.

  In the toilet nozzle 40 shown in FIG. 12, the flow path 41 s is formed to extend to the tip of the toilet nozzle main body 41. The jet forming member 42 is inserted into the flow path 41 s so that the outer peripheral surface of the large diameter portion 42 c is in contact with the inner surface of the toilet nozzle main body 41.

  In addition, a groove 41g having a semicircular cross section that protrudes in the radial direction of the flow path 41s is formed at the outer periphery of the flow path 41s at the distal end of the toilet nozzle body 41. The groove 41g is formed with a predetermined length so that the upper end of the groove 41g is located above the upper end of the large-diameter portion 42c when the jet forming member 42 is inserted into the flow path 41s.

  When washing water is supplied from the connecting pipe 44 of FIG. 5 to the toilet nozzle 40, the washing water is ejected from the tip of the groove 41g through the channel 41s and the groove 41g. At this time, the washing water is ejected to the outside along the outer peripheral surfaces of the large diameter portion 42c and the enlarged portion 42d. Thereby, washing water is ejected radially from the toilet nozzle 40.

  In the toilet nozzle 40, as described above, the jet forming member 42 is inserted into the flow path 41s so that the outer peripheral surface of the large diameter portion 42c and the inner surface of the toilet nozzle main body 41 are in contact with each other. Thereby, it is possible to prevent a shift between the axial center of the toilet nozzle body 41 and the axial center of the jet forming member 42. As a result, the wash water can be stably ejected from the toilet nozzle 40.

  In addition, in FIG. 12, although the four groove parts 41g are shown in figure, the number of the groove parts 41g is not limited to four. For example, two or three groove portions 41g may be formed, and five or more groove portions 41g may be formed. Moreover, the cross-sectional shape of the groove part 41g is not limited to the example of FIG. For example, the groove 41g may have a rectangular cross-sectional shape.

(4-g) Still Another Structural Example of Toilet Nozzle FIG. 13 is a cross-sectional view illustrating still another structural example of the toilet nozzle 40. FIG. 13A shows a longitudinal sectional view at the tip of the toilet nozzle 40, and FIG. 13B shows a sectional view taken along line C19-C19 in FIG. 13A. The toilet nozzle 40 of FIG. 13 differs from the toilet nozzle 40 of FIG. 8 in the following points.

  In the toilet nozzle 40 shown in FIG. 13, six through holes 41 i are formed at the tip of the toilet nozzle main body 41. These six through-holes 41i are arranged at equal intervals on the circumference of a predetermined diameter centering on the axis of the toilet nozzle body 41.

  A jet forming part 45 that protrudes downward from the central part is integrally formed at the tip of the toilet nozzle body 41. The jet forming portion 45 includes an enlarged portion 45b that gradually increases in diameter toward the tip and a flange portion 45c that is formed at the tip of the enlarged portion 45b. In addition, the diameter of the rear end of the jet forming part 45 is equal to the diameter of the inscribed circle of the six through holes 41i.

  When washing water is supplied from the connecting pipe 44 in FIG. 5 to the toilet nozzle 40, the washing water is ejected from the tip of the through hole 41i through the flow path 41s and the through hole 41i. At this time, the washing water is ejected outside along the outer peripheral surface of the enlarged portion 45b. Thereby, washing water is ejected radially from the toilet nozzle 40.

  In the toilet nozzle 40, as described above, the jet forming part 45 is integrally formed at the tip of the toilet nozzle main body 41. Therefore, there is no deviation between the axis of the toilet nozzle body 41 and the axis of the jet forming part 45. As a result, the wash water can be stably ejected from the toilet nozzle 40.

  Moreover, since the toilet nozzle main-body part 41 and the jet flow formation part 45 are integrally formed, the number of parts of the toilet nozzle 40 can be reduced. Thereby, manufacture of sanitary washing device 100 becomes easy.

  In FIG. 13, six through holes 41i are illustrated, but the number of through holes 41i is not limited to six. For example, five or less through holes 41i may be formed, and seven or more through holes 41i may be formed. Further, the cross-sectional shape of the through hole 41i is not limited to the example of FIG. For example, the through hole 41i may have a rectangular cross-sectional shape.

(4-h) Still Another Structural Example of Toilet Nozzle FIG. 14 is a cross-sectional view illustrating still another structural example of the toilet nozzle 40. FIG. 14A shows a longitudinal sectional view at the tip of the toilet nozzle 40, and FIG. 14B shows a sectional view taken along line C20-C20 in FIG. 14A. The toilet nozzle 40 of FIG. 14 differs from the toilet nozzle 40 of FIG. 8 in the following points.

  In the toilet nozzle 40 shown in FIG. 14, the jet forming member 42 is provided so that the axis of the insertion shaft 42 a is positioned rearward with respect to the axis of the toilet nozzle main body 41.

  Therefore, the front side of the gap between the inner peripheral surface of the toilet nozzle body 41 and the outer peripheral surface of the jet forming member 42 is increased. In this case, the amount of washing water ejected from the front gap of the toilet nozzle 40 is larger than the amount of washing water ejected from the rear gap. Thereby, even when the toilet nozzle 40 is provided on the rear side of the toilet bowl 700 (FIG. 1), a sufficient amount of washing water can be supplied to the front side of the inner surface of the toilet bowl 700. As a result, the front side of the inner surface of the toilet bowl 700 is sufficiently wetted by the washing water, and it is possible to reliably prevent the filth from adhering to the toilet bowl 700.

  In addition, the method of increasing the quantity of the wash water ejected from the front side of the toilet nozzle 40 is not limited to said example. FIG. 15 is a view for explaining another method for increasing the amount of washing water ejected from the front side of the toilet nozzle 40.

  The toilet nozzle 40 of FIG. 15A is different from the toilet nozzle 40 of FIG. 12B in the following points. In the toilet nozzle 40 of FIG. 15A, the distance between the groove portions 41g on the front side is smaller than the distance between the groove portions 41g on the rear side. In other words, the plurality of grooves 41g are arranged at a high density on the front side of the toilet nozzle 40. Thereby, the quantity of the wash water ejected to the front side of the toilet nozzle 40 can be increased.

  Further, the toilet nozzle 40 shown in FIG. 15B is different from the toilet nozzle 40 of FIG. 12B in the following points. In the toilet nozzle 40 of FIG. 15B, the cross-sectional area of the groove 41g on the front side is larger than the cross-sectional area of the groove 41g on the rear side. Thereby, the quantity of the wash water ejected to the front side of the toilet nozzle 40 can be increased.

  The toilet nozzle 40 shown in FIG. 15C is different from the toilet nozzle 40 shown in FIG. 13B in the following points. In the toilet nozzle 40 of FIG. 15C, the distance between the through holes 41i on the front side is smaller than the distance between the through holes 41i on the rear side. That is, the plurality of through holes 41 i are concentrated on the front side of the toilet nozzle 40. Thereby, the quantity of the wash water ejected to the front side of the toilet nozzle 40 can be increased.

  Further, the toilet nozzle 40 shown in FIG. 15D is different from the toilet nozzle 40 of FIG. 13B in the following points. In the toilet nozzle 40 of FIG. 15D, the cross-sectional area of the front through hole 41i is larger than the cross sectional area of the rear through hole 41i. Thereby, the quantity of the wash water ejected to the front side of the toilet nozzle 40 can be increased.

(4-i) Still Another Structural Example of Toilet Nozzle FIG. 16 is a cross-sectional view illustrating still another structural example of the toilet nozzle 40. The toilet nozzle 40 shown in FIG. 16 differs from the toilet nozzle 40 of FIG. 8 in the following points.

  In the toilet nozzle 40 shown in FIG. 16, the front end surface of the toilet nozzle main body 41 is formed such that the front side is inclined upward. A flange portion 42e is provided at the tip of the large diameter portion 42c so that the front side is inclined upward.

  In this case, the wash water is ejected obliquely upward from the front of the toilet nozzle 40. Thereby, even when the toilet nozzle 40 is provided on the rear side of the toilet bowl 700 (FIG. 1), a sufficient amount of washing water can be supplied to the front side of the inner surface of the toilet bowl 700. As a result, the front side of the inner surface of the toilet bowl 700 is sufficiently wetted by the washing water, and it is possible to reliably prevent the filth from adhering to the toilet bowl 700.

  Further, the length in the direction parallel to the axial direction of the flow path formed by the gap between the outer peripheral surface of the large diameter portion 42c of the jet flow forming member 42 and the inner peripheral surface of the toilet nozzle main body 41 is short on the front side and on the rear side. The side becomes longer. In this case, the flow rate of the wash water flowing in the front flow path is larger than the flow rate of the wash water flowing in the rear flow path. Thereby, the front side of the inner surface of the toilet 700 can be sufficiently wetted with the washing water. As a result, it is possible to reliably prevent filth from adhering to the toilet bowl 700.

(4-j) Still Another Structural Example of Toilet Nozzle FIG. 17 is a cross-sectional view illustrating still another structural example of the toilet nozzle 40. The toilet nozzle 40 shown in FIG. 17 differs from the toilet nozzle 40 of FIG. 8 in the following points.

  In the toilet nozzle 40 shown in FIG. 17, a jet forming member 42 is provided so as to be movable up and down. In this example, the size of the gap between the inner peripheral surface of the toilet nozzle body 41 and the outer peripheral surface of the insertion shaft 42a (large diameter portion 42c) is adjusted by moving the jet forming member 42 up and down. Can do. Thereby, the flow rate of the wash water ejected from the toilet nozzle 40 can be adjusted.

  As shown in FIG. 17A, when the flange portion 42e is separated from the tip end opening 41h, a gap between the inner peripheral surface of the toilet nozzle main body 41 and the outer peripheral surface of the insertion shaft 42a is increased. In this case, since the flow rate of the wash water ejected from the toilet nozzle 40 is reduced, the spread range of the wash water ejected radially is reduced.

  Therefore, for example, at the time of cleaning the rear of the toilet bowl, the flushing water is ejected from the toilet nozzle 40 in the state shown in FIG. 17A, thereby preventing the flushing water from splashing forward from the toilet nozzle 40. The rear side of the inner surface of (FIG. 1) can be wetted with washing water. Thereby, it is possible to prevent filth from adhering to the toilet bowl 700 while preventing the washing water from adhering to the user.

  As shown in FIG. 17B, when the flange portion 42e is brought close to the tip opening 41h, the gap between the inner peripheral surface of the toilet nozzle main body 41 and the outer peripheral surface of the large-diameter portion 42c is small. Become. In this case, the flow rate of the wash water ejected from the toilet nozzle 40 is increased.

  Therefore, for example, at the time of toilet bowl pre-washing, a sufficient amount of flush water can be supplied to the front side of the inner surface of the toilet bowl 700 by ejecting flush water from the toilet nozzle 40 in the state shown in FIG. . As a result, the front side of the inner surface of the toilet bowl 700 is sufficiently wetted by the washing water, and it is possible to reliably prevent the filth from adhering to the toilet bowl 700.

  In this example, the jet forming member 42 is formed so that the maximum cross-sectional area of the enlarged portion 42d is larger than the area of the tip opening 41h. In this case, the tip opening 41h can be sealed with the enlarged portion 42d by moving the jet forming member 42 upward. Therefore, when the user is using the toilet apparatus 1000, it is possible to prevent filth from adhering to the tip opening 41h by sealing the tip opening 41h with the enlarged portion 42d.

  Thereby, it is possible to prevent the filth from being ejected from the toilet nozzle 40 together with the washing water during the toilet pre-cleaning. As a result, it is possible to sufficiently prevent filth from adhering to the toilet bowl 700.

  Further, by sealing the tip opening 41h, it is possible to prevent dust, detergent, and the like from entering the flow path 41s when the toilet room is cleaned. Thereby, contamination of the toilet nozzle 40 can be prevented more reliably.

  Moreover, in this example, even if scale components, rust, dust, filth, and the like of tap water adhere to the jet forming member 42 and the tip opening 41h, the adhering matter is caused by moving the jet forming member 42 up and down. Can be easily removed. Thereby, clogging of the toilet nozzle 40 can be prevented.

  In addition, as shown in FIG. 18, you may provide the toilet nozzle main-body part 41 so that an up-down movement is possible.

(4-k) Still Another Example of Structure of Toilet Nozzle and Surrounding Area FIG. 19 is a diagram illustrating another example of the structure of the toilet nozzle 40 and the vicinity thereof (hereinafter abbreviated as toilet bowl nozzle 40 and the like). The toilet nozzle 40 shown in FIG. 19 differs from the toilet nozzle 40 shown in FIG. 5 in the following points.

  As shown in FIG. 19A, in this example, a box-shaped toilet nozzle cover 40K having a cover opening 40V at the lower end is provided so as to cover the tip of the toilet nozzle 40. The toilet nozzle 40 is provided so as to be movable up and down, and when the toilet nozzle 40 moves downward, as shown in FIG. 19B, the jet flow forming member 42 moves from the cover opening 40V to the lower side of the toilet nozzle cover 40K. Protruding.

  In this example, since the toilet nozzle cover 40K is provided so as to surround the distal end portion of the toilet nozzle 40, it is possible to reliably prevent filth from adhering to the toilet nozzle 40. Therefore, the toilet nozzle 40 is not contaminated by dirt.

  Further, since the toilet nozzle 40 is surrounded by the toilet nozzle cover 40K, it is possible to prevent the toilet nozzle 40 from being damaged when the sanitary washing device 100 is transported.

  Further, in this example, when washing water is ejected from the toilet nozzle 40 in the state of FIG. 19A, the washing water collides with the inner surface of the toilet nozzle cover 40 </ b> K and rebounds on the toilet nozzle 40. Thereby, the toilet nozzle 40 is washed and contamination of the toilet nozzle 40 is prevented.

  At the time of toilet pre-washing, washing water is ejected in the state shown in FIG.

  In addition, as shown in FIG. 20, you may provide the toilet nozzle cover 40K so that an up-down movement is possible.

(4-1) Still Another Example of Structure of Toilet Nozzle and Surrounding Area FIG. 21 is a diagram showing still another example of the structure of the toilet nozzle 40 and the like. 21 is different from the toilet nozzle 40 shown in FIG. 5 in the following points.

  As shown in FIG. 21, in this example, the toilet nozzle 40 is fixed to the main body lower casing 200A. The front end portion of the toilet nozzle main body 41 protrudes downward from the lower surface of the main body lower casing 200A. The connecting pipe 44 is connected to the side surface of the toilet nozzle main body 41.

  A motor 49m is provided in the main body lower casing 200A, and one end of the rotating piece 43 is fixed to a rotating shaft 49s of the motor 49m. A plate-shaped toilet nozzle cover 40 </ b> K is attached to the other end of the rotating piece 43. The tip of the toilet nozzle cover 40K protrudes downward from the lower surface of the main body lower casing 200A.

  As the rotating shaft 49s of the motor 49m rotates, the toilet nozzle cover 40K moves in the vertical direction in front of the toilet nozzle 40.

  In this example, toilet pre-washing is performed in a state where the lower end of the toilet nozzle cover 40K is located above the tip of the toilet nozzle 40, as shown in FIG.

  In addition, as shown in FIG. 21B, the toilet rear cleaning is performed in a state where the lower end of the toilet nozzle cover 40K is positioned at substantially the same height as the tip of the toilet nozzle 40. In this case, the washing water sprayed forward from the toilet nozzle 40 collides with the toilet nozzle cover 40K and bounces back to the tip of the toilet nozzle 40. This prevents the cleaning water from adhering to the human body and cleans the tip of the toilet nozzle 40. Further, the toilet nozzle cover 40K prevents filth from adhering to the tip of the toilet nozzle 40. As a result, contamination of the tip of the toilet nozzle 40 can be reliably prevented.

  Moreover, in this example, since it is not necessary to rotate the toilet nozzle 40, it is possible to prevent the toilet nozzle 40 from being damaged. Moreover, since the toilet nozzle 40 can be stabilized, the ejection state of washing water can be stabilized.

(4-m) Still Another Example of Structure of Toilet Nozzle and Surrounding Area FIG. 22 is a diagram illustrating still another example of the structure of the toilet nozzle 40 and the like. The toilet nozzle 40 shown in FIG. 22 differs from the toilet nozzle 40 shown in FIG. 5 in the following points.

  As shown in FIG. 22A, in this example, the toilet nozzle 40 is provided in a box-shaped toilet nozzle cover 40K having a cover opening 40V below. The rear end portion of the toilet nozzle 40 is connected to a toilet nozzle motor 40m. Thereby, when the toilet nozzle motor 40m operates, the tip of the toilet nozzle 40 rotates.

  As shown in FIG. 22A, when flush water is ejected while the toilet nozzle 40 is held horizontally, the flush water collides with the upper surface of the toilet nozzle cover 40K and rebounds on the toilet nozzle 40. Thereby, the toilet nozzle 40 is washed and contamination of the toilet nozzle 40 is prevented. When performing the toilet pre-cleaning, as shown in FIG. 22 (b), the cleaning water is ejected while the toilet nozzle 40 is held in the vertical direction.

  In this example, as shown in FIG. 22A, the toilet nozzle 40 can be held horizontally in the toilet nozzle cover 40K. Thereby, even when a sufficient space in the height direction cannot be secured in the main body 200 (FIG. 4), the toilet nozzle 40 can be easily provided in the main body 200. Therefore, the main body 200 can be miniaturized and the main body 200 can be easily designed.

  In addition, in the state where the toilet nozzle 40 is held horizontally, the toilet nozzle 40 is sufficiently protected by the toilet nozzle cover 40K, so that it is possible to reliably prevent filth from adhering to the toilet nozzle 40. Further, the toilet nozzle 40 can be reliably prevented from being damaged.

  Moreover, the breadth WW (refer FIG.9 (b)) of washing water can be adjusted by adjusting the rotation angle of the toilet nozzle 40. FIG.

(4-n) Another Configuration Example of Main Body FIG. 23 is a schematic diagram illustrating another configuration example of the main body 200. The main body 200 of FIG. 23 differs from the main body 200 of FIG. 3 in the following points.

  In the main body 200 of FIG. 23, an ion elution device 70 is interposed between the water stop electromagnetic valve 7 and the flow rate sensor 8 in the pipe 3.

  The ion elution device 70 is controlled by the control unit 90 and elutes silver ions in the wash water flowing through the pipe 3 (sanitization operation). Thereby, washing water containing silver ions is ejected from the buttocks nozzle 21, bidet nozzle 22, nozzle washing nozzle 23 and toilet nozzle 40. Details of the ion elution device 70 will be described later.

  Since silver ions have bactericidal properties, bacteria adhering to the washing water outlets of the buttocks nozzle 21, bidet nozzle 22 and toilet nozzle 40 are sterilized.

  Further, portions of the buttocks nozzle 21 and the bidet nozzle 22 protruding into the toilet bowl 700 are cleaned by the nozzle cleaning nozzle 23. Thereby, sterilization of the buttocks nozzle 21 and the bidet nozzle 22 is performed reliably.

  Furthermore, since flush water is ejected from the toilet nozzle 40 to a wide area on the inner surface of the toilet bowl 700 during pre-washing of the toilet bowl, the toilet bowl 700 is surely sterilized. Thereby, generation | occurrence | production of malodor can be prevented and the toilet bowl 700 can be kept clean.

  Further, as described above, in this example, the toilet nozzle 40 can be cleaned using the cleaning water rebounded by the toilet nozzle cover 40K (FIG. 5). Therefore, the toilet nozzle 40 is also sterilized reliably.

  In addition, the ion eluted in the ion elution apparatus 70 should just be a metal ion which has bactericidal property other than said silver ion, For example, a copper ion or a zinc ion may be used. In this case, it replaces with the below-mentioned silver electrode 75 (FIG. 24) provided in the ion elution apparatus 70, and a copper electrode or a zinc electrode is used.

(4-o) Configuration of Ion Eluting Device FIG. 24 is a cross-sectional view of the ion eluting device 70 of FIG. FIG. 24A shows a cross-sectional view of the ion eluting apparatus 70, and FIG. 24B shows a cross-sectional view (longitudinal sectional view) of the ion eluting apparatus 70 in FIG. 24A taken along line C5-C5. Has been.

  As shown in FIGS. 24A and 24B, the ion elution device 70 has an electrode casing 71. The electrode casing 71 includes a flow path forming portion 71a and an electrode support portion 71b. An ion elution space FU is formed inside the flow path forming portion 71a. The ion elution space FU constitutes a part of the flow path of the wash water.

  On one side of the electrode casing 71, an electrode support member 73 is fixed by screws 74. One end of two L-shaped silver electrodes 75 is embedded in the electrode support member 73. Two through holes for inserting the two silver electrodes 75 are formed on one side surface of the electrode casing 71. Two silver electrodes 75 are inserted into the ion elution space FU via the two through holes, respectively.

  An opening 71 s is formed on the other side of the electrode casing 71. The port member 72 is attached so as to close the opening 71s. The other end of the two silver electrodes 75 is attached to the port member 72.

  The port member 72 is formed with a first port 72a and a second port 72b. The piping 3 of FIG. 23 is connected to the first port 72a and the second port 72b, respectively. Wash water flowing through the pipe 3 is introduced into the ion elution space FU via the second port 72b. By applying a voltage between the two silver electrodes 75, silver ions are eluted from the silver electrode 75 into the washing water in the ion elution space FU. This washing water containing silver ions flows again into the pipe 3 through the first port 72a.

  In the ion elution apparatus 70 having the above-described configuration, the two silver electrodes 75 are located at a substantially central portion of the ion elution space FU, and a gap is formed between the silver electrode 75 and the inner lower surface of the electrode casing 71. Yes.

  As a result, a precipitate (silver chloride, silver oxide, etc.) containing silver ions generated by the electrolytic reaction of the silver electrode 75 is precipitated on the inner lower surface of the electrode casing 71. Thereby, a decrease in the interelectrode potential between the two silver electrodes 75 due to the eluted silver ions is prevented, and a stable electrolytic action can be obtained. Moreover, it is prevented that such a deposit adheres between the two silver electrodes 75, and a short circuit between electrodes can be prevented.

  Further, as shown in FIG. 24B, the second port 72 b is provided on the lower surface side of the electrode casing 71. In this case, the sediment precipitated on the inner lower surface of the electrode casing 71 can be efficiently discharged from the ion elution space FU by the wash water flowing from the second port 72b to the first port 72a.

  Moreover, as shown in FIG. 24B, the upper surface of the ion elution space FU is inclined upward toward the port member 72 side. In this case, the gas generated in the ion elution space FU is collected at the upper part on the port member 72 side. Thereby, the gas generated in the ion elution space FU can be efficiently discharged from the first port 72a.

  As described above, the ion elution device 70 is controlled by the control unit 90. In other words, the application timing of the voltage between the two silver electrodes 75 is controlled by the control unit 90.

(4-p) Still Another Configuration Example of Main Body FIG. 25 is a schematic diagram illustrating still another configuration example of the main body 200. The main body 200 of FIG. 25 is different from the main body 200 of FIG. 3 in the following points.

  In the main body 200 of FIG. 25, a branch pipe 33 extending from between the constant flow valve 6 and the water stop solenoid valve 7 in the pipe 3 is provided. The branch pipe 33 is provided with a water stop solenoid valve 34 and a toilet nozzle 40.

  In this case, by controlling the water stop solenoid valve 34 by the control unit 90, the start and stop of the flushing of the wash water from the toilet nozzle 40 can be easily switched.

  Moreover, since the branch pipe 33 is provided in the upstream part of the main-body part 200, wash water can be supplied to the toilet nozzle 40 with sufficient pressure.

  Moreover, by opening the water stop solenoid valve 7 and the water stop solenoid valve 34, it becomes possible to simultaneously eject the wash water from the nozzle portion 20 and the toilet nozzle 40.

(4-q) Still Another Configuration Example of Main Body FIG. 26 is a schematic diagram illustrating still another configuration example of the main body 200. The main body 200 of FIG. 26 is different from the main body 200 of FIG. 3 in the following points.

  In the main body 200 of FIG. 26, the toilet switch valve 14 is provided in the pipe 3. The toilet switch valve 14 includes a toilet switch valve motor 14m. The toilet switch valve 14 is provided in the pipe 3 on the upstream side of the connecting portion with the branch pipe 30 and on the downstream side of the water stop solenoid valve 7. A pipe 35 is connected to one of the plurality of ports of the toilet switching valve 14. The toilet nozzle 40 is provided at the tip of the pipe 35.

  In this case, by controlling the toilet switch valve motor 14m by the control unit 90, the start and stop of the flushing water ejection from the toilet nozzle 40 can be easily switched.

  Moreover, since the branch pipe 35 is provided in the upstream part of the main-body part 200, wash water can be supplied to the toilet nozzle 40 with sufficient pressure.

(4-r) Still Another Configuration Example of Main Body FIG. 27 is a schematic diagram illustrating still another configuration example of the main body 200. 27 differs from the main body 200 of FIG. 3 in the following points.

  27, a toilet switch valve 14 is provided between the buffer tank 12 and the human body switch valve 13 in the pipe 10. A pipe 35 is connected to one of the plurality of ports of the toilet switching valve 14. The toilet nozzle 40 is provided at the tip of the pipe 35.

  In this case, by controlling the toilet switch valve motor 14m by the control unit 90, the start and stop of the flushing water ejection from the toilet nozzle 40 can be easily switched.

  Moreover, since the piping 35 is arrange | positioned in the downstream of the pump 11, the pressure of the washing water supplied to the toilet nozzle 40 can be kept constant.

  Moreover, since the piping 35 is arrange | positioned in the downstream of the heat exchanger 9, warm water can be ejected from the toilet nozzle 40. FIG. Thereby, it can prevent more reliably that filth adheres to toilet bowl 700. FIG. Further, the sterilization effect can be obtained by washing the toilet bowl 700 with warm water.

(4-s) Still Another Configuration Example of Main Body FIG. 28 is a schematic diagram illustrating still another configuration example of the main body 200. The main body 200 of FIG. 28 is different from the main body 200 of FIG. 3 in the following points.

  27, a switching valve 15 is provided instead of the switching valve 13 for human body in FIG. The switching valve 15 includes a switching valve motor 15m. A butt nozzle 21, a bidet nozzle 22, a nozzle cleaning nozzle 23, and a pipe 36 are connected to a plurality of ports of the switching valve 15, respectively. A toilet nozzle 40 is provided at the tip of the pipe 36.

  In the switching valve 15, the washing water pumped from the pump 11 by the operation of the switching valve motor 15m is supplied to any one of the posterior nozzle 21, the bidet nozzle 22, the nozzle washing nozzle 23, and the toilet nozzle 40 (pipe 36). The

  In this example, since the buttocks nozzle 21, bidet nozzle 22, nozzle washing nozzle 23 and toilet nozzle 40 can be connected to the common switching valve 15, the configuration of the main body can be simplified. Thereby, the manufacturing cost of the sanitary washing device 100 can be reduced.

<5> Configuration and control of heat exchanger (5-a) Appearance and structure of heat exchanger The heat exchanger 9 will be described. 29 is an external perspective view of the heat exchanger 9 of FIG. 3 viewed from one side, FIG. 30 is an external perspective view of the heat exchanger 9 of FIG. 3 viewed from the other side, and FIG. It is a top view of the heat exchanger 9. FIG. FIG. 29 also shows a control system of the heat exchanger 9.

  32A is a cross-sectional view taken along line A31-A31 in FIG. 31, FIG. 32B is a cross-sectional view taken along line B31-B31 in FIG. 31, and FIG. 32C is a cross-sectional view taken along line C31-C31 in FIG. It is line sectional drawing. Further, FIG. 33 (a) is a side view of the heat exchanger 9 of FIG. 3, and FIG. 33 (b) is a sectional view taken along line C33-C33 of FIG. 33 (a).

  In the following description, as indicated by arrows X, Y, and Z in FIGS. 29 to 33, three directions orthogonal to each other are defined as an X direction, a Y direction, and a Z direction, respectively. In this example, the Z direction indicates the vertical direction.

  As shown in FIGS. 29 and 30, the heat exchanger 9 is provided with two sheathed heaters 91 and 92 so as to be aligned in the X direction and in the Z direction. The center portions of these two sheathed heaters 91 and 92 are respectively inserted into the inside of the tubular flow path forming tube 9T. Thereby, the flow path (FIGS. 32 and 33) of the cleaning water is formed between the outer peripheral surfaces of the sheathed heaters 91 and 92 and the inner peripheral surface of the flow path forming tube 9T. Details will be described later.

  Both end portions of the sheathed heaters 91 and 92 and the flow path forming tube 9T are fixed by end surface members 94 and 95, respectively. The central part of the two flow path forming tubes 9T is fixed in a state sandwiched between the two metal plates 93a and 93b. Thereby, the sheathed heaters 91 and 92, the end surface members 94 and 95, the flow path forming tube 9T, and the metal plates 93a and 93b are integrally fixed to each other.

  The metal plates 93a and 93b fix the flow path forming tube 9T and function as a heat radiating plate when the sheathed heaters 91 and 92 are driven.

  A non-returnable thermostat 96 is attached to one metal plate 93a sandwiching the two flow path forming tubes 9T (FIG. 29). The thermostat 96 is used to monitor the temperature of the metal plate 93a, and serves as a temperature fuse that cuts off current when the heat exchanger 8 is blown without water or when the triac is short-circuited. Fulfill.

  Instead of the non-returning thermostat 96, a thermal fuse may be used. In this case, for example, a thermal fuse is disposed between the two flow path forming tubes 9T and attached so as to be sandwiched between the two metal plates 93a and 93b. Thereby, since a temperature fuse can be integrally attached to the heat exchanger 9, a dead space can be utilized effectively. Further, the heat exchanger provided with the thermal fuse integrally can be thinned.

  The end surface member 95 that fixes one end of each of the sheathed heaters 91 and 92 is formed with a water inlet port 91P so as to extend in the Y direction (FIG. 30). Further, a water discharge temperature detecting portion 95Z is integrally formed on one side of the end face member 95 in the Z direction. A water outlet port 92P is formed in the water outlet temperature detector 95Z, and a return thermostat 97 and a hot water temperature sensor 98 are attached (FIG. 29).

  Further, the water inlet port 91P is connected to a unit (not shown) constituted by the flow rate sensor 8 of FIG. 3 and a water inlet temperature sensor (not shown). This unit may be provided integrally with the end face member 95. In this case, the installation space of the flow rate sensor 8, the incoming water temperature sensor, and the heat exchanger 9 in the main body 200 of FIG. 3 is sufficiently reduced.

  As shown in FIG. 31 and FIG. 32 (c), in the end surface member 95, the water inlet port 91 </ b> P is formed so that its internal space communicates with the internal space of the flow path forming tube 9 </ b> T that covers the sheathed heater 91.

  Further, the water outlet port 92P is formed so that its internal space communicates with the internal space of the flow path forming tube 9T that covers the sheathed heater 92 via the temperature detection space 95S formed inside the end face member 95Z.

  The internal space of the water inlet port 91P and the water outlet port 92P, the space between the inner peripheral surface of the flow path forming tube 9T and the outer peripheral surface of the sheathed heaters 91 and 92, and the temperature detection space 95S constitute the flow path f of the wash water. .

  As described above, in the end face member 95, the flow path f on the sheathed heater 91 side and the flow path f on the sheathed heater 92 side are separated from each other. Thereby, the wash water supplied to the water inlet port 91P is sent to the end surface member 94 side along the outer peripheral surface of the sheathed heater 91 (FIG. 32B).

  As shown in FIG. 32 (a), in the end face member 94, between the two fixed flow path forming pipes 9T, the internal space of the flow path forming pipe 9T covering the sheathed heater 91 and the sheathed heater 92 are provided. A flow path f communicating with the internal space of the flow path forming tube 9T to be covered is formed.

  Thereby, the wash water supplied to the end face member 94 side along the outer peripheral surface of the sheathed heater 91 covers the sheathed heater 92 through the flow path f formed between the two flow path forming pipes 9T. It is guided to the flow path f on the flow path forming tube 9T side. Then, this cleaning water is sent again to the end face member 95 side along the outer peripheral surface of the sheathed heater 92 (FIG. 32B). The washing water sent to the end face member 95 side flows out from the water discharge port 92P through the temperature detection space 95S.

  As shown in FIG. 32 (c), a part of the hot water temperature sensor 98 is inserted into the temperature detection space 95S. Thereby, the temperature of the wash water flowing through the temperature detection space 95S is measured by the tapping temperature sensor 98. Moreover, the thermostat 97 is attached to the one surface side orthogonal to the Z direction in the water discharge temperature detection part 95Z. The thermostat 97 is used to monitor the temperature of the wash water flowing through the temperature detection space 95S, and the heat exchanger 9 is heated when the hot water temperature (the temperature of the wash water flowing out of the heat exchanger 9) exceeds a predetermined temperature. Shut off the power of the.

  The peripheral structure of the sheathed heaters 91 and 92 will be described. As shown in FIG. 33B, a spiral spring 9B is provided between the sheathed heaters 91 and 92 and the flow path forming tube 9T so as to be wound around the outer peripheral surfaces of the sheathed heaters 91 and 92. It has been.

  Thereby, the spiral flow path f is formed between the outer peripheral surfaces of the sheathed heaters 91 and 92, the inner peripheral surface of the flow path forming tube 9T, and the spring 9B. Therefore, as described above, when the cleaning water flows along the outer peripheral surfaces of the sheathed heaters 91 and 92, the cleaning water flows while swirling spirally.

  By supplying current to the sheathed heaters 91 and 92, the sheathed heaters 91 and 92 generate heat. In this state, the cleaning water is caused to flow along the outer peripheral surfaces of the sheathed heaters 91 and 92. In this case, the washing water flowing around the outer peripheral portion is heated. As a result, the washing water heated by the sheathed heaters 91 and 92 flows out from the water outlet port 92P.

  The cross-sectional area (flow-path cross-sectional area) of the flow path f formed by the sheathed heaters 91 and 92, the flow-path forming tube 9T, and the spring 9B is much larger than the cross-sectional area of the heat exchanger using the ceramic heater. Can be set small.

Specifically, the flow path cross-sectional area of the heating section of the heat exchanger 9 shown in FIG. 33 (b) is set to about 7 mm ² . on the other hand. The flow passage cross-sectional area of the heating part in the heat exchanger using the ceramic heater is set to about 32 mm ² .

  Thereby, compared with the case where a ceramic heater is used, generation | occurrence | production of the temperature nonuniformity of the wash water heated by the sheathed heaters 91 and 92 is fully suppressed. Thereby, the flow rate of the cleaning water after heating is stabilized.

  As a result, the temperature gradient in the heater becomes substantially constant, and the flow rate can be estimated from the detected temperature from the hot water temperature sensor 98 and the incoming water temperature sensor (not shown), and the amount of current supplied to the pump 11. For this reason, the flow sensor 8 (FIG. 3) becomes unnecessary and space saving is implement | achieved. Of course, more accurate control is possible by attaching the flow sensor 8.

  As described above, the heat exchanger 9 of FIG. 29 has a simple structure and does not require ultrasonic welding and potting when assembling. Thereby, the assembly man-hour is reduced.

  Further, as described above, in this heat exchanger 9, the thermostat 97 monitors the temperature of the wash water immediately before flowing out of the heat exchanger 9, so that the temperature abnormality of the wash water flowing out of the heat exchanger 9 is quickly detected. Is detected.

  Here, the structure of the sheathed heaters 91 and 92 will be described. Since both the sheathed heaters 91 and 92 have the same structure, only the structure of the sheathed heater 91 will be described below.

  FIG. 34 is a view for explaining the structure of the sheathed heater 91 of FIG. 34 (a) shows a side view of the sheathed heater 91, FIG. 34 (b) shows a top view of the sheathed heater 91, and FIG. 34 (c) shows a longitudinal sectional view of the sheathed heater 91. .

  As shown in FIGS. 34 (a) and 34 (b), the sheathed heater 91 has a structure in which the electrodes 91a protrude from both ends of one copper tube 91c. Moreover, the terminal 91b is attached to the part of the two electrodes 91a which protrude from the both ends of the copper tube 91c, respectively.

  As shown in FIG. 34 (c), inside the copper tube 91c, the inserted two electrodes 91a are connected by a heating wire 91w. The copper tube 91c is further filled with magnesium oxide powder as an insulating material.

  In the sheathed heater 91 having the above configuration, a metal tube such as steel, stainless steel, or Inconel may be used instead of the copper tube 91c. For example, a tungsten filament is used as the heating wire 91w.

  As described above, two sheathed heaters 91 and 92 are used in the heat exchanger 9. Each of these rated powers is 600W. Thereby, the heat exchanger 9 is driven at a maximum of 1200W. Note that 1200 W is almost the maximum amount of power that can be obtained from a general household outlet.

(5-b) Heat Exchanger Driving Method by Phase Control As shown in FIG. 29, the two sheathed heaters 91 and 92 provided in the heat exchanger 9 are each connected to the power supply unit 9VI. The power supply unit 9VI is connected to the AC power supply ACS and the control unit 90.

  Power supply unit 9VI includes a triac and trigger unit (not shown). In response to the control signal given from the control unit 90, the trigger unit gives a pulsed ignition signal to the triac. Thereby, the firing angle of the triac is phase-controlled, and the electric power supplied from the AC power supply ACS to the sheathed heaters 91 and 92 is adjusted.

  As described above, when the electric power supplied to the sheathed heaters 91 and 92 is adjusted by phase control of the firing angle, a harmonic component (harmonic current) is generated in the current flowing through the sheathed heaters 91 and 92.

  The level of the harmonic current increases as the amplitude of the alternating current at the firing angle increases. Therefore, in this example, two sheathed heaters 91 and 92 having a rated power of 600 W are used in order to suppress generation of high-level harmonic current due to phase control of the firing angle, and a method described below. Then, the heat exchanger 9 is driven. In this example, the total rated power of the heat exchanger 9 is 1200W.

  In the following description, the sheathed heater 91 disposed on the water inlet port 91P side of FIG. 30 is referred to as a primary-side sheathed heater 91, and the sheathed heater 92 disposed on the outlet port 92P side of FIG. Call. Moreover, the ratio of the total drive power actually supplied to the sheathed heaters 91 and 92 of the heat exchanger 9 with respect to the total rated power (1200 W) of the heat exchanger 9 is referred to as the total load factor. The control of the driving power by the phase control of the triac firing angle is called phase control.

(5-c) First Driving Method for Heat Exchanger A first driving method for the heat exchanger 9 will be described. FIG. 35 is a diagram for explaining a first driving method of the heat exchanger 9 of FIG. FIG. 35A shows the relationship between the driving power of the primary sheathed heater 91 and the total load factor. FIG. 35B shows the relationship between the driving power of the secondary sheathed heater 92 and the total load factor.

  As shown in FIGS. 35 (a) and 35 (b), in this driving method, only the driving power of the secondary-side sheathed heater 92 is total when the total load factor is greater than 0% and not more than 50%. Phase control is performed in proportion to the value of the load factor, and no driving power is supplied to the primary side sheathed heater 91.

  On the other hand, in the range where the total load factor is greater than 50% and equal to or less than 100%, only the drive power of the primary-side sheathed heater 91 is the total load factor with the drive power of 600 W being supplied to the secondary-side sheathed heater 92. Phase control is performed in proportion to the value. In this case, since the driving power of the secondary side sheathed heater 92 is not phase-controlled, no harmonic current flows through the secondary side sheathed heater 92.

  As described above, in the first driving method, the phase control of the driving power of the primary side sheathed heater 91 and the secondary side sheathed heater 92 is not performed simultaneously. Thereby, when the heat exchanger 9 is driven, harmonic currents are prevented from flowing through the primary side sheathed heater 91 and the secondary side sheathed heater 92 simultaneously.

  In addition, the level of harmonic current generated at a predetermined firing angle in a sheathed heater having a rated power of 600 W is sufficiently lower than the level of harmonic current generated at the same firing angle in a sheathed heater having a rated power of 1200 W. .

  This is because the amplitude of the alternating current flowing through the sheathed heater having the rated power of 600 W is sufficiently smaller than the amplitude of the alternating current flowing through the sheathed heater having the rated power of 1200 W.

  For the above reason, driving the heat exchanger 9 of FIG. 29 using the first driving method enables higher harmonics compared to the case where a sheathed heater having a rated power of 1200 W is used for the heat exchanger 9. Generation of current is sufficiently suppressed.

  In this example, the heat exchanger 9 can be driven at a maximum of 1200 W. Thereby, sufficient calorific value required in order to heat washing water can be obtained. Thereby, even when the temperature of the cleaning water supplied from the water pipe is very low, the temperature of the cleaning water can be raised quickly and reliably. As a result, the cleaning water supplied to the user's local area is reliably adjusted to an appropriate temperature.

  Further, as described above, only the driving power of the secondary-side sheathed heater 92 is phase-controlled in the range where the total load factor is greater than 0% and 50% or less. The secondary-side sheathed heater 92 is disposed on the side of the water discharge port 92P (FIG. 30), and a hot water temperature sensor 98 (FIG. 32 (c)) is provided in the vicinity of the water discharge port 92P. Thereby, the temperature of the wash water heated by the secondary side sheathed heater 92 is accurately measured by the tapping temperature sensor 98 immediately after the heating.

  Therefore, in the range from 0% to 50% of the total load factor, the driving power of the heat exchanger 9 is accurately controlled by the control unit 90 of FIG. 29 based on the measured temperature value measured by the tapping temperature sensor 98. Be controlled. As a result, the cleaning water supplied to the user's local area is reliably adjusted to a more appropriate temperature.

(5-d) Second Driving Method of Heat Exchanger The second driving method of the heat exchanger 9 will be described with respect to differences from the first driving method. FIG. 36 is a diagram for explaining a second driving method of the heat exchanger 9 of FIG. FIG. 36A shows the relationship between the driving power of the primary sheathed heater 91 and the total load factor. FIG. 36B shows the relationship between the driving power of the secondary sheathed heater 92 and the total load factor.

  As shown in FIG. 36 (a) and FIG. 36 (b), in this driving method, the secondary load is the same as in the first driving method in the range where the total load factor is larger than 0% and smaller than 50%. The phase control is performed so that only the driving power of the side sheathed heater 92 is proportional to the value of the total load factor, and the driving power is not supplied to the primary side sheathed heater 91.

  When the total load factor is 50%, the drive power supplied to the primary sheathed heater 91 is 600 W, and the drive power supplied to the secondary sheathed heater 92 is 0 W.

  On the other hand, when the total load factor is greater than 50% and equal to or less than 100%, only the driving power of the secondary side sheathed heater 92 is the value of the total load factor in a state where 600 W of power is supplied to the primary side sheathed heater 91. The phase control is performed in proportion to. In this case, since the drive power of the primary side sheathed heater 91 is not phase-controlled, no harmonic current flows through the primary side sheathed heater 91.

  As described above, in the second driving method, the phase control is performed only for the driving power of the secondary-side sheathed heater 92 in the entire load factor range of 0% to 100%. The temperature of the cleaning water heated by the secondary-side sheathed heater 92 is accurately measured by the tapping temperature sensor 98 immediately after the heating.

  Therefore, the driving power of the heat exchanger 9 is accurately controlled based on the measured temperature value measured by the tapping temperature sensor 98 over the entire range of the total load factor. As a result, the cleaning water supplied to the user's local area is reliably adjusted to a more appropriate temperature.

(5-e) Third Driving Method of Heat Exchanger The third driving method of the heat exchanger 9 will be described with respect to differences from the first driving method. FIG. 37 is a diagram for explaining a third driving method of the heat exchanger 9 of FIG. FIG. 37A shows the relationship between the driving power of the primary sheathed heater 91 and the total load factor. FIG. 37B shows the relationship between the driving power of the secondary sheathed heater 92 and the total load factor.

  As shown in FIGS. 37 (a) and 37 (b), in this driving method, the primary-side sheathed heater 91 and the secondary-side sheathed heater 92 are in a range where the total load factor is greater than 0% and not more than α%. The phase control is performed so that each of the driving powers is proportional to the value of the total load factor.

  In this example, the symbol α represents a predetermined total load factor as low as about 5%. When the total load factor is α%, the primary side sheathed heater 91 is driven with the power of βW, and the secondary side sheathed heater 92 is also driven with the power of βW. Thereby, the heat exchanger 9 is driven with the electric power of (β + β) W as a whole.

  Then, in the range where the total load factor is larger than α% and equal to or smaller than (50 + α / 2)%, phase control is performed so that the driving power of the primary-side sheathed heater 91 is constant at βW. Further, phase control is performed so that the driving power of the secondary side sheathed heater 92 is proportional to the value of the total load factor.

  Further, in the range where the total load factor is greater than (50 + α / 2)% and not more than 100%, the drive power of the primary side sheathed heater 91 is total while the drive power of 600 W is supplied to the secondary side sheathed heater 92. Phase control is performed in proportion to the value of the load factor.

  As described above, in the third driving method, the driving power of each of the primary side sheathed heater 91 and the secondary side sheathed heater 92 is the total load factor within a range where the total load factor is greater than 0% and less than or equal to α%. The phase control is performed in proportion to the value of. In the range where the total load factor is greater than α% and less than or equal to 100%, the drive powers of the primary side sheathed heater 91 and the secondary side sheathed heater 92 are always greater than or equal to βW.

  As a result, the primary side sheathed heater 91 generates heat at a low temperature by being always driven with electric power of βW or more in a range where the total load factor is greater than α% and 100% or less. Thereby, when the driving power of the primary side sheathed heater 91 changes greatly, for example, when the total load factor rises to exceed (50 + α / 2)%, a delay in heat generation of the primary side sheathed heater 91 is prevented. .

  It should be noted that both the drive voltages supplied to the primary-side sheathed heater 91 and the secondary-side sheathed heater 92 are phase-controlled within a range where the total load factor is greater than 0% and less than or equal to α%. The amplitude of the alternating current at is very small. Thereby, generation of high-level harmonic current is sufficiently suppressed.

(5-f) Fourth Driving Method of Heat Exchanger The fourth driving method of the heat exchanger 9 will be described with respect to differences from the third driving method. FIG. 38 is a view for explaining a fourth driving method of the heat exchanger 9 of FIG. FIG. 38A shows the relationship between the driving power of the primary sheathed heater 91 and the total load factor. FIG. 38B shows the relationship between the driving power of the secondary sheathed heater 92 and the total load factor.

  As shown in FIGS. 38 (a) and 38 (b), in this driving method, as in the third driving method, in the range where the total load factor is greater than 0% and less than or equal to α%, the primary side sheath is used. Phase control is performed so that the drive power of each of the heater 91 and the secondary side sheathed heater 92 is proportional to the value of the total load factor.

  In a range where the total load factor is larger than α% and smaller than (50 + α / 2)%, phase control is performed so that the electric power of the primary side sheathed heater 91 is constant at βW. Further, phase control is performed so that the electric power of the secondary side sheathed heater 92 is proportional to the value of the total load factor.

  When the total load factor is (50 + α / 2)%, the drive power supplied to the primary-side sheathed heater 91 is 600 W, and the drive power supplied to the secondary-side sheathed heater 92 is βW.

  When the total load factor is greater than (50 + α / 2)% and less than or equal to 100%, the drive power of the secondary side sheathed heater 92 is only the total load while the drive power of 600 W is supplied to the primary side sheathed heater 91. Phase control is performed in proportion to the value of the rate. In this case, since the drive power of the primary side sheathed heater 91 is not phase-controlled, no harmonic current flows through the primary side sheathed heater 91.

  As described above, in the fourth driving method, the phase is such that only the driving power of the secondary-side sheathed heater 92 is proportional to the value of the total load factor when the total load factor is in the range of α% to 100%. Control is performed. The temperature of the cleaning water heated by the secondary-side sheathed heater 92 is accurately measured by the tapping temperature sensor 98 immediately after the heating.

  Therefore, the driving power of the heat exchanger 9 is accurately controlled based on the measured temperature value measured by the tapping temperature sensor 98 over the entire range of the total load factor. As a result, the cleaning water supplied to the user's local area is reliably adjusted to a more appropriate temperature.

(5-g) Fifth Driving Method of Heat Exchanger A fifth driving method of the heat exchanger 9 will be described with respect to differences from the first driving method. FIG. 39 is a diagram for explaining a fifth driving method of the heat exchanger 9 of FIG. FIG. 39A shows the relationship between the driving power of the primary sheathed heater 91 and the total load factor. FIG. 39B shows the relationship between the driving power of the secondary sheathed heater 92 and the total load factor.

  As shown in FIGS. 39A and 39B, in this driving method, the secondary side sheathed heater 92 is driven in a range where the total load factor is larger than 0% and not larger than (50−γ)%. Phase control is performed so that only the power is proportional to the value of the total load factor, and no driving power is supplied to the primary side sheathed heater 91.

  In this example, the symbol γ represents the value of the total load factor that is arbitrarily set. The total load factor γ is preferably set, for example, in a range of about 5% to about 25%.

  When the total load factor is (50−γ)%, the driving power of the secondary-side sheathed heater 92 is 300 W, and a harmonic current flows through the secondary-side sheathed heater 92. On the other hand, since the phase of the driving power of the primary side sheathed heater 91 is not controlled, no harmonic current flows through the primary side sheathed heater 91.

  In the range where the total load factor is greater than (50−γ)% and equal to or less than (50 + γ)%, the drive power of the primary side sheathed heater 91 and the secondary side sheathed heater 92 is proportional to the value of the total load factor, respectively. Phase control is performed. The proportional relationship between the driving power of the primary side sheathed heater 91 and the total load factor and the proportional relationship between the driving power of the secondary side sheathed heater 92 and the total load factor are set to be equal to each other.

  Thereby, the driving power of the primary side sheathed heater 91 increases from 0 W to 300 W while the total load factor increases from (50−γ)% to (50 + γ)%. Further, the driving power of the secondary side sheathed heater 92 increases from 300 W to 600 W as the total load factor increases from (50−γ)% to (50 + γ)%.

  Here, in the range where the total load factor is larger than (50−γ)% and smaller than (50 + γ)%, the phase control is performed on the driving power of the primary side sheathed heater 91 and the secondary side sheathed heater 92 as described above. Since the harmonic current flows through each of the sheathed heaters 91 and 92, the sum of the levels of the harmonic current flowing through the sheathed heaters 91 and 92 is the maximum value of the level of the harmonic current generated in one of the sheathed heaters. Not exceed.

  When the total load factor is (50 + γ)%, the driving power of the primary side sheathed heater 91 is 300 W, and a harmonic current flows through the primary side sheathed heater 91. On the other hand, since the phase of the drive power of the secondary side sheathed heater 92 is not controlled, no harmonic current flows through the secondary side sheathed heater 92.

  In the range where the total load factor is greater than (50 + γ)% and equal to or less than 100%, only the drive power of the primary-side sheathed heater 91 is the total load factor in the state where the drive power of 600 W is supplied to the secondary-side sheathed heater 92. Phase control is performed in proportion to the value. In this case, since the driving power of the secondary side sheathed heater 92 is not phase-controlled, no harmonic current flows through the secondary side sheathed heater 92.

  As described above, in the fifth driving method, the total load factor is greater than 0% in the range of (50−γ)% or less, and the total load factor is greater than (50 + γ)% in the range of 100% or less. Since the harmonic current does not flow through the primary side sheathed heater 91 and the secondary side sheathed heater 92 at the same time, generation of high level harmonic current is sufficiently suppressed.

  Further, in the range where the total load factor is larger than (50−γ)% and smaller than (50 + γ)%, the sum of the levels of the harmonic currents flowing through the primary side sheathed heater 91 and the secondary side sheathed heater 92 is Since the maximum value of the level of harmonic current generated in the sheathed heater is not exceeded, generation of high-level harmonic current is sufficiently suppressed as compared with the case where a sheathed heater with a rated power of 1200 W is used for the heat exchanger 9. The

  As described above, in the fifth driving method, the total load factor is lower than the total load factor in which the phase control is performed only for the driving power of the primary sheathed heater 91, that is, larger than (50−γ)% ( The driving power is supplied to the primary-side sheathed heater 91 within a range of 50 + γ)% or less.

  As a result, the primary side sheathed heater 91 generates heat at a low temperature in a range where the total load factor is greater than (50−γ)% and not more than (50 + γ)%. Thereby, for example, when the total load factor increases so as to exceed (50 + γ)%, a delay in heat generation of the primary side sheathed heater 91 is prevented.

(5-h) Sixth Driving Method of Heat Exchanger The sixth driving method of the heat exchanger 9 will be described with respect to differences from the fifth driving method. FIG. 40 is a diagram for explaining a sixth driving method of the heat exchanger 9 of FIG. FIG. 40A shows the relationship between the driving power of the primary sheathed heater 91 and the total load factor. FIG. 40B shows the relationship between the driving power of the secondary sheathed heater 92 and the total load factor.

  As shown in FIGS. 40 (a) and 40 (b), in this driving method, the drive power of the primary side sheathed heater 91 and the secondary side sheathed heater 92 is controlled from a total load factor of 0% to (50 + γ). This is the same as the fifth driving method in a range smaller than%.

  When the total load factor is (50 + γ)%, the driving power supplied to the primary-side sheathed heater 91 is 600 W, and the driving power supplied to the secondary-side sheathed heater 92 is 300 W. In this case, since the drive power of the primary side sheathed heater 91 is not phase-controlled, no harmonic current flows through the primary side sheathed heater 91.

  When the total load factor is greater than (50 + γ)% and equal to or less than 100%, the drive power of the secondary-side sheathed heater 92 is only the total load factor in a state where 600 W of drive power is supplied to the primary-side sheathed heater 91. Phase control is performed in proportion to the value.

  As described above, in the sixth driving method, the range of the total load factor lower than the total load factor in which the primary side sheathed heater 91 is driven with the power of 600 W, that is, larger than (50−γ)% (50 + γ). ) Drive power is supplied to the primary sheathed heater 91 within a range of% or less.

  As a result, the primary side sheathed heater 91 generates heat at a low temperature in a range where the total load factor is greater than (50−γ)% and not more than (50 + γ)%. Thereby, for example, when the total load factor increases so as to exceed (50 + γ)%, a delay in heat generation of the primary side sheathed heater 91 is prevented.

  As described above, in the sixth driving method, the phase control of the driving power of the secondary-side sheathed heater 92 is performed in the entire load factor range of 0% to 100%. The temperature of the cleaning water heated by the secondary-side sheathed heater 92 is accurately measured by the tapping temperature sensor 98 immediately after the heating.

  Therefore, the driving power of the heat exchanger 9 is accurately controlled based on the measured temperature value measured by the tapping temperature sensor 98 over the entire range of the total load factor. As a result, the cleaning water supplied to the user's local area is reliably adjusted to a more appropriate temperature.

(5-i) Seventh Driving Method of Heat Exchanger A seventh driving method of the heat exchanger 9 will be described. FIG. 41 is a diagram for explaining a seventh driving method of the heat exchanger 9 of FIG. FIG. 41A shows an example of a current waveform flowing through the primary side sheathed heater 91, and FIG. 41B shows an example of a current waveform flowing through the secondary side sheathed heater 92.

  In this example, the frequency of the AC power supply ACS to which the heat exchanger 9 is connected is 60 Hz.

  41 (a) and 41 (b), the vertical axis represents current, and the horizontal axis represents time. A thick solid line represents a current flowing through the primary side sheathed heater 91 and the secondary side sheathed heater 92. Furthermore, in FIG. 41 (a) and FIG. 41 (b), numbers 1 to 60 respectively indicating 60 cycles of alternating current in one second are attached for easy understanding.

  In the seventh driving method, only the driving power of either the primary-side sheathed heater 91 or the secondary-side sheathed heater 92 is phase-controlled.

  In the example of FIGS. 41A and 41B, a cycle in which the driving power supplied to the primary sheathed heater 91 is phase-controlled and the driving power supplied to the secondary-side sheathed heater 92 is not phase-controlled, The cycle in which the driving power supplied to the secondary-side sheathed heater 92 is phase-controlled without phase control of the driving power supplied to the primary-side sheathed heater 91 is alternately switched.

  Thus, in the seventh driving method, the phase control of the driving power of the primary side sheathed heater 91 and the secondary side sheathed heater 92 is not performed simultaneously. Thereby, when the heat exchanger 9 is driven, harmonic currents are prevented from flowing through the primary side sheathed heater 91 and the secondary side sheathed heater 92 simultaneously.

  Accordingly, by driving the heat exchanger 9 of FIG. 29 using the seventh driving method, a higher level of harmonic current can be obtained compared to the case where a sheathed heater having a rated power of 1200 W is used for the heat exchanger 9. Occurrence is sufficiently suppressed.

  Note that the switching between the phase control of the driving power supplied to the primary-side sheathed heater 91 and the phase control of the driving power supplied to the secondary-side sheathed heater 92 is not necessarily performed every cycle. Can be set to For example, it may be performed every two or three cycles.

(5-j) Other Driving Methods In the above description, as the driving method of the heat exchanger 9, it has been described that the phase control is performed on the driving power of the primary side sheathed heater 91 and the secondary side sheathed heater 92. Instead of performing phase control, the heat exchanger 9 may be driven by the method described below.

(5-k) Eighth Driving Method of Heat Exchanger An eighth driving method of the heat exchanger 9 will be described. FIG. 42 is a view for explaining an eighth driving method of the heat exchanger 9 of FIG. FIG. 42 (a) shows an example of a current waveform flowing through the primary side sheathed heater 91, and FIG. 42 (b) shows an example of a current waveform flowing through the secondary side sheathed heater 92.

  42A and 42B, the vertical axis represents current, and the horizontal axis represents time. A thick solid line represents a current flowing through the primary side sheathed heater 91 and the secondary side sheathed heater 92. Further, in FIGS. 42A and 42B, numbers 1 to 60 respectively indicating 60 cycles of alternating current in one second are attached for easy understanding.

  In the eighth driving method, the on / off state of energization to the primary side sheathed heater 91 and the secondary side sheathed heater 92 is selected for each cycle of the alternating current.

  In the example of FIG. 42A, the primary-side sheathed heater 91 is energized with a full-wave alternating current in the first cycle and the 31st cycle. In the example of FIG. 42B, the secondary-side sheathed heater 92 is energized with a full-wave alternating current in the first cycle and the 31st cycle.

  In this case, the drive power of the primary side sheathed heater 91 and the secondary side sheathed heater 92 is 20 W, respectively. Thereby, the heat exchanger 9 is driven with the electric power of 40 W as a whole.

  As described above, according to the eighth driving method, the on / off state of energization to the primary side sheathed heater 91 and the secondary side sheathed heater 92 is selected for each cycle, so that heat can be generated without using phase control. The exchanger 9 can be driven and the total load factor of the heat exchanger 9 can be adjusted. Accordingly, no harmonic current flows through the primary side sheathed heater 91 and the secondary side sheathed heater 92.

  Further, in the eighth driving method, the timing of energization to the primary side sheathed heater 91 and the secondary side sheathed heater 92 is set to be distributed over 60 cycles (1 second).

  For example, as shown in the example of FIG. 42 (a), when the primary-side sheathed heater 91 is energized twice with full-wave alternating current within 60 cycles, all of the first and 31st cycles A wave alternating current is energized.

  Further, for example, when the primary-side sheathed heater 91 is energized with the full-wave alternating current four times within 60 cycles, the full-wave alternating current in the first cycle, the 16th cycle, the 31st cycle, and the 46th cycle. Current is applied.

  Thus, by setting the timing of energizing the primary side sheathed heater 91 and the secondary side sheathed heater 92 to be distributed within 60 cycles, the power line to which the heat exchanger 9 is connected is large at a low frequency. The occurrence of voltage drop is suppressed. Thereby, even when the lighting device connected to the same power supply line as the heat exchanger 9 is present, the occurrence of flicker in the lighting device is suppressed.

(5-l) Ninth Driving Method of Heat Exchanger A ninth driving method of the heat exchanger 9 will be described with respect to differences from the eighth driving method. FIG. 43 is a diagram for explaining a ninth driving method of the heat exchanger 9 of FIG. FIG. 43A shows an example of a current waveform flowing through the primary side sheathed heater 91, and FIG. 43B shows an example of a current waveform flowing through the secondary side sheathed heater 92.

  In FIGS. 43A and 43B, the vertical axis represents current, and the horizontal axis represents time. A thick solid line represents a current flowing through the primary side sheathed heater 91 and the secondary side sheathed heater 92. Further, in FIGS. 43 (a) and 43 (b), numbers 1 to 60 respectively indicating 60 cycles of alternating current in one second are attached for easy understanding.

  In the ninth driving method, the timing of energizing the primary side sheathed heater 91 and the secondary side sheathed heater 92 is individually controlled.

  In this way, by individually controlling the energization timing to the primary-side sheathed heater 91 and the secondary-side sheathed heater 92, as shown in the examples of FIGS. 43 (a) and 43 (b), within 60 cycles. The first-side sheathed heater 91 can be energized with the full-wave current in the first cycle, and the secondary-side sheathed heater 92 can be energized with the second-side sheathed heater 92 in the first and second cycles of the 60 cycles. . Also, the timing of energizing the primary side sheathed heater 91 and the timing of energizing the secondary side sheathed heater 92 are partially different.

  In this case, a high level (amplitude) current flows through the heat exchanger 9 in the first cycle. Therefore, when there is a lighting device connected to the same power line as the heat exchanger 9, flickering is likely to occur in the lighting device.

  However, in this example, in the second cycle, a current having a level (amplitude) half that of the first cycle flows through the heat exchanger 9. Therefore, the fluctuation of the level of the current flowing through the heat exchanger 9 is alleviated as compared with the case where a high level (amplitude) current flows through the heat exchanger 9 only in the first cycle. Thereby, the fluctuation amount of the voltage drop generated in the same power supply line as the heat exchanger 9 is alleviated. As a result, even if flicker occurs, the generated flicker is not noticeable.

  As shown by the thick dotted line in FIG. 43 (b), when energization to the secondary side sheathed heater 92 in the second cycle is performed in the 59th cycle, a locally high level current is supplied in the first cycle. Flows into the heat exchanger 9. Therefore, when there is a lighting device connected to the same power supply line as the heat exchanger 9, significant flicker is likely to occur in the lighting device.

(5-m) Harmonic test “JIS (Japanese Industrial Standards) C6100-3-2” limits the harmonic component (harmonic current) included in the input current generated by the EUT under the specified test conditions. A value is defined.

  Therefore, the present inventor measured harmonic currents up to the 40th order generated when the heat exchanger 9 of FIG. 29 was driven at 900 W using the first driving method described above.

  FIG. 44 is a current waveform diagram that is applied when the heat exchanger 9 is driven at 900 W by the first driving method, and FIG. 45 is a harmonic waveform up to the 40th order that is generated when the heat exchanger 9 is driven at 900 W by the first driving method. It is a graph which shows the measurement result of a wave current.

  In FIG. 44, current is shown on the vertical axis and time is shown on the horizontal axis. Moreover, the electric current which flows into the heat exchanger 9 is shown by the thick curve. As shown in FIG. 44, the waveform diagram of the current supplied to the heat exchanger 9 during 900 W drive has a portion that changes sharply by phase control. Harmonic current is generated in this part.

  In FIG. 45, the current value (level) of the harmonic current is shown on the vertical axis, and the order of the harmonic current is shown on the horizontal axis. Further, the white bar graph shows the limit value for each order of the harmonic current, and the black bar graph shows the actual measurement value for each order of the harmonic current.

  According to FIG. 45, when the heat exchanger 9 according to the first driving method is driven at 900 W, both the odd-order harmonic current and the even-order harmonic current at a level lower than the odd-order harmonic current are generated. Nearly all of these harmonic current levels were below the limit.

  As described above, according to the first driving method, even when the heat exchanger 9 is driven with a high power of 900 W, generation of high-level harmonic current exceeding the limit value is sufficiently suppressed.

(5-n) High-temperature water ejection prevention mechanism In the sanitary washing device 100 according to this example, immediately after the user's local washing is performed, the washing water already heated at the time of washing is heated inside the heat exchanger 9. To remain.

  At this time, the amount of heat remaining in the sheathed heaters 91 and 92 of the heat exchanger 9 is large enough to sufficiently heat the cleaning water remaining in the heat exchanger 9. Therefore, immediately after the user's local cleaning is performed, after the water stop solenoid valve 7 in FIG. 3 is closed, the cleaning water remaining in the heat exchanger 9 is retained by the residual heat of the sheathed heaters 91 and 92. Continued heating (after boiling occurs).

  Therefore, when the local cleaning of the user is started again, the cleaning water remaining inside the heat exchanger 9 may be heated to a high temperature. Therefore, in order to prevent the washing water heated to a high temperature by the heat exchanger 9 from being ejected from the nozzle part 20 of FIG. 3 to the local part of the user, it is necessary to provide a high-temperature water ejection preventing mechanism shown below. is there.

  FIG. 46 is a diagram illustrating a first example of the high-temperature water ejection preventing mechanism. As shown in FIG. 46, in this example, the buffer tank BT is inserted into the pipe 10 connected to the water outlet port 92P of the heat exchanger 9.

  Thereby, even when the washing water is heated to a high temperature in the heat exchanger 9, the high-temperature washing water is temporarily stored in the buffer tank BT, and the temperature of the washing water is buffered. As a result, the washing water heated to a high temperature is prevented from being jetted out to the user's local area.

  The buffer tank BT may be provided integrally with the water outlet port 92P of the heat exchanger 9, as indicated by a dotted line in FIG. In this case, size reduction of the main-body part 200 in the sanitary washing apparatus 100 is implement | achieved.

  FIG. 47 is a diagram illustrating a second example of the high-temperature water ejection preventing mechanism. As shown in FIG. 47, in this example, the inner diameter of the flow path forming tube 9T covering the secondary side sheathed heater 92 is formed to be very large compared to the inner diameter of the flow path forming tube 9T covering the primary side sheathed heater 91. The

  In this case, the secondary flow path f2 formed along the outer peripheral surface of the secondary-side sheathed heater 92 is disconnected from the cross-sectional area of the primary flow path f1 formed along the outer peripheral surface of the primary-side sheathed heater 91. Increases area. Thereby, the secondary flow path f2 acts as a temperature buffer part of the heated washing water. As a result, the washing water heated to a high temperature is prevented from being jetted out to the user's local area.

  In this case, since the secondary flow path f2 serves as the buffer tank BT of FIG. 46, it is not necessary to provide a buffer tank as a high-temperature water ejection preventing mechanism in the main body 200. Thereby, size reduction of the main-body part 200 is implement | achieved.

  FIG. 48 is a diagram illustrating a third example of the high-temperature water ejection preventing mechanism. 48 shows the heat exchanger 9, the human body switching valve 13, the nozzle unit 20, and the control unit 90.

  In the nozzle portion 20, the tip portions of the butt nozzle 21, the bidet nozzle 22, and the nozzle cleaning nozzle 23 are all housed in a nozzle tip housing portion 25 indicated by a broken line. At this time, the washing water spout (not shown) of the buttocks nozzle 21 and the bidet nozzle 22 is covered by the nozzle tip accommodating portion 25. The details of the nozzle tip accommodating portion 25 will be described later (see FIG. 63).

  At the time of cleaning the user's local part, the tip of the butt nozzle 21 or the bidet nozzle 22 protrudes from the nozzle tip accommodating part 25. FIG. 48 shows a state where the bidet nozzle 22 protrudes from the nozzle tip accommodating portion 25.

  In this example, after the user's local cleaning is once completed, when the user's local cleaning is performed again within a predetermined time, the control unit 90 controls the human body switching valve 13 as follows.

  The control unit 90 controls the human body switching valve 13 so that the washing water flows to nozzles (tail nozzles 21) other than the nozzles (bidet nozzles 22) to be used. At this time, the buttocks nozzle 21 is accommodated in the nozzle tip accommodating portion 25.

  Thus, even when the cleaning water is heated to a high temperature by the heat exchanger 9, the high temperature cleaning water is ejected in the nozzle tip accommodating portion 25 and flows down without being ejected to the local part of the user.

  In addition, after the washing water is ejected from the buttocks nozzle 21 or the bidet nozzle 22, the control unit 90 causes the nozzle washing nozzle 23 to wash the washing water when the washing water is ejected from the buttocks nozzle 21 or the bidet nozzle 22 again within a predetermined time. The human body switching valve 13 may be controlled so as to flow.

  FIG. 49 is a diagram illustrating a fourth example of the high-temperature water ejection preventing mechanism. FIG. 49A shows the water stop solenoid valve 7, the heat exchanger 9, the human body switching valve 13, the nozzle unit 20, and the control unit 90. FIG. 49 (b) shows a control sequence of the water stop solenoid valve 7 and the heat exchanger 9 by the control unit 90.

  In this example, the water stop solenoid valve 7 is opened when it is on and closed when it is off. The heat exchanger 9 generates heat when in the on state and does not generate heat when in the off state.

  As shown in FIG. 49B, the control unit 90 turns off the water stop solenoid valve 7 and the heat exchanger 9 when the user's local part is not cleaned.

  And the control part 90 makes the water stop electromagnetic valve 7 an ON state first, when a user's local washing | cleaning is started. Thereby, the wash water supplied from the water pipe 1 in FIG. 3 flows into the heat exchanger 9, and the wash water remaining in the heat exchanger 9 flows out to the pipe 10. Then, the heat exchanger 9 is cooled by newly supplied wash water. At this time, the butt nozzle 21 or the bidet nozzle 22 does not protrude from the nozzle tip accommodating portion 25. Thereby, even if the washing water (residual water) remaining in the heat exchanger 9 is heated to a high temperature, the residual water is ejected inside the nozzle tip accommodating portion 25 and ejected to the user's local area. It flows down without a break.

  Subsequently, as the minute period DT1 elapses, the control unit 90 turns the heat exchanger 9 on. Thereby, the washing water is heated by the heat exchanger 9. The heated washing water is sent to the human body switching valve 13 through the pipe 10 and is ejected from the butt nozzle 21 or the bidet nozzle 22 protruding from the nozzle tip accommodating portion 25. Then, the user's local area is cleaned.

  Thus, in this example, when cleaning of the user's local part is started, the cleaning water remaining inside the heat exchanger 9 is sent to the outside of the heat exchanger 9 without being heated. As a result, the heat exchanger 9 is cooled, and the heat exchanger 9 is prevented from excessively generating heat during the subsequent heat generation. As a result, high-temperature washing water is sufficiently prevented from being ejected to the user's local area.

  Thereafter, the controller 90 first switches the heat exchanger 9 to the OFF state when the cleaning of the user's local area is completed. Thereby, the high-temperature washing water remaining in the heat exchanger 9 flows out to the pipe 10. Then, the heat exchanger 9 is cooled by newly supplied wash water.

  Subsequently, as the minute period DT2 elapses, the control unit 90 switches the water stop solenoid valve 7 to the off state. Thereby, the supply of the washing water to the heat exchanger 9 is stopped.

  Thus, in this example, even when the cleaning of the user's local area is completed, the cleaning water remaining inside the heat exchanger 9 is sent to the outside of the heat exchanger 9 without being heated. Therefore, even when the cleaning is started again immediately after the user's local cleaning, the cleaning water heated to a high temperature by the heat exchanger 9 is reliably prevented from being ejected to the user's local.

  In this example, the control sequence of the control unit 90 can prevent high-temperature washing water from being ejected to the user's local area. Therefore, since it is not necessary to provide a new member as the high temperature water ejection preventing mechanism, the sanitary washing apparatus 100 can be prevented from being enlarged.

  In the above control sequence, the micro periods DT1 and DT2 are adjusted by the control unit 90 based on the temperature of the cleaning water supplied to the heat exchanger 9. Thereby, it is prevented that cold washing water is ejected to a user's local part.

  In addition to controlling the water stop solenoid valve 7 and the heat exchanger 9 as described above, the control unit 90 operates the heat exchanger 9 and cleans the pump of FIG. 11 may be operated. Thereby, the cold washing water remaining in the water supply system on the downstream side of the heat exchanger 9 can be ejected in the nozzle tip housing portion 25. Thereby, it is prevented that cold washing water is jetted out to a user's local part.

  At this time, the heat exchanger 9 may send the cleaning water supplied to the nozzle unit 20 to the nozzle cleaning nozzle 23 before the local cleaning by the user by controlling the human body switching valve 13. As a result, the tips of the butt nozzle 21 and the bidet nozzle 22 before the user's local cleaning are cleaned.

  Moreover, the control part 90 may operate the pump 11 of FIG. 3 while operating the heat exchanger 9 after the local washing | cleaning by a user. As a result, the heat exchanger 9 that has generated heat during the local cleaning by the user can be cooled by the newly supplied cold cleaning water.

  At this time, the heat exchanger 9 may send the cleaning water supplied to the nozzle unit 20 after the local cleaning by the user to the nozzle cleaning nozzle 23 by controlling the switching valve 13 for human body. As a result, the tips of the posterior nozzle 21 and the bidet nozzle 22 after washing the user's local area are washed.

  Furthermore, in addition to the above, the controller 90 may control each part of the main body 200 as follows.

  The hot water temperature sensor 98 in FIG. 32C detects the temperature of the washing water heated by the heat exchanger 9 and gives it to the control unit 90. As a result, the controller 90 detects an abnormality when the temperature of the cleaning water supplied from the tapping temperature sensor 98 is higher than a predetermined abnormal temperature (for example, 42 degrees) during cleaning of the user's local area. It judges that it generate | occur | produced, and operation | movement of each component of the sanitary washing apparatus 100 is stopped. Thereby, it is prevented that hot washing water is jetted out to a human body.

  On the other hand, when the high-temperature washing water inside the heat exchanger 9 is discharged as described above, the temperature detected by the tapping temperature sensor 98 tends to exceed the abnormal temperature. Therefore, when discharging the high-temperature washing water inside the heat exchanger 9, the control unit 90 sets the abnormal temperature to a higher temperature than that during the local washing of the user. Thereby, the operation | movement of the sanitary washing apparatus 100 does not stop at the time of discharge | emission of high temperature washing water.

(5-o) Prevention of disconnection of heating wire As shown in FIG. 34 (c), the heating wire 91w is attached to the inside of the primary-side sheathed heater 91 and the secondary-side sheathed heater 92 provided in the heat exchanger 9. Yes.

  Here, the watt density of the heating wire 91w is very high. Accordingly, if the density distribution of magnesium oxide filled in the copper pipes 91c of the sheathed heaters 91 and 92 is not uniform, the temperature of the heating wire 91w is remarkably increased in a portion where the density of magnesium oxide is low. Thereby, there exists a possibility that the heating wire 91w may be disconnected.

  Filling the copper pipe 91c with magnesium oxide is performed by filling the copper pipe 91c with magnesium oxide powder from one side and compressing it. However, the density of magnesium oxide in the copper tube 91c tends to be low at the other end.

  This is because it is difficult to push the magnesium oxide to the other end by filling the magnesium oxide with the heating wire 91w having a large number of turns per unit length provided in the copper tube 91c. It is. For this reason, in the sheathed heater, the heating wire is likely to break near the end portion on one side or the other side.

  Therefore, in order to prevent disconnection of the heating wire 91w, the primary-side sheathed heater 91 and the secondary-side sheathed heater 92 are configured as follows.

  FIG. 50 is a diagram illustrating a first structure example of the sheathed heaters 91 and 92 for preventing the heating wire 91w of FIG. 34C from being disconnected.

  As shown in FIG. 50, in the first structural example of the sheathed heaters 91 and 92, the sheathed heater 91 is compared with the number of turns per unit length of the heating wire 91w in the central region ER2 of the sheathed heaters 91 and 92. , 92 has a small number of turns per unit length of the heating wire 91w in the region ER1 in the vicinity of both ends.

  Thereby, it becomes easy to fill the magnesium oxide powder in the vicinity of both ends of the copper tube 91c. Thereby, since the density of magnesium oxide at both ends of the sheathed heaters 91 and 92 can be increased, disconnection of the heating wire near one or the other end of the sheathed heaters 91 and 92 is prevented.

  FIG. 51 is a diagram illustrating a second structure example of the sheathed heater for preventing the heating wire 91w of FIG. 34C from being disconnected.

  As shown in FIG. 51, in the second structural example of the sheathed heaters 91 and 92, the outer diameter of the copper tube 91c in the vicinity 91cd of the end portions of the sheathed heaters 91 and 92 is gradually increased from the center side toward the end portion. It is formed to be small.

  Accordingly, when filling the copper tube 91c with the magnesium oxide powder, the magnesium oxide powder is easily filled in the vicinity of both ends of the copper tube 91c. Thereby, since the density of magnesium oxide at both ends of the sheathed heaters 91 and 92 can be increased, disconnection of the heating wire near one or the other end of the sheathed heaters 91 and 92 is prevented.

(5-p) Fire Prevention As described above, the power supply unit 9VI in FIG. 29 includes a triac. Here, it is preferable that the triac is attached to the heat exchanger 9 in the following manner, in case of fire.

  FIG. 52 is a diagram showing an example of attaching the triac to the heat exchanger 9 included in the power supply unit 9VI of FIG. In FIG. 52, three examples of attachment to the heat exchanger 9 of the triac are shown.

  As shown in FIG. 52 (a), it is assumed that the heat exchanger 9 is provided in the main body 200 such that the primary side sheathed heater 91 and the secondary side sheathed heater 92 are arranged vertically.

  In this case, the triac is preferably attached to the lower part of the flow path forming tube 9T that covers the primary sheathed heater 91 located below. As a result, even if the triac is ignited, the flow path forming tube 9T does not burn, thus preventing the spread of fire.

  As shown in FIG. 52 (b), it is assumed that the heat exchanger 9 is provided in the main body portion 200 so that the primary side sheathed heater 91 and the secondary side sheathed heater 92 are arranged side by side in the horizontal direction. .

  In this case, the triac is preferably attached to the lower portion of the flow path forming tube 9T that covers the primary-side sheathed heater 91 or the secondary-side sheathed heater 92. As a result, even if the triac is ignited, the flow path forming tube 9T does not burn, thus preventing the spread of fire.

  As shown in FIG. 52 (c), a case is assumed in which only one sheathed heater is provided in the heat exchanger 9. In this case, the triac is preferably attached to the lower part of the flow path forming tube covering the sheathed heater. As a result, even if the triac is ignited, the flow path forming tube 9T does not burn, thus preventing the spread of fire.

  Note that unwashed cold washing water flows into the primary flow path f1 (see FIG. 47) formed along the primary side sheathed heater 91. Therefore, the triac is preferably attached to the flow path forming tube 9T that covers the primary-side sheathed heater 91. As a result, the TRIAC is cooled by the washing water flowing through the primary flow path f1.

(5-q) Prevention of temperature unevenness (5-q-1) First configuration example of heat exchanger for preventing temperature unevenness Primary side sheathed heater 91 and secondary side sheathed heater 92 provided in heat exchanger 9 Do not necessarily have the same rated power.

  FIG. 53 is a diagram showing the heat exchanger 9 including two types of sheathed heaters with different rated power. For example, a sheathed heater with a rated power of 900 W is used as the primary-side sheathed heater 91T, and a sheathed heater with a rated power of 300 W is used as the secondary-side sheathed heater 92.

  In this case, the temperature of the cleaning water supplied from the water inlet port 91P can be rapidly increased by the primary side sheathed heater 91T driven with a large driving power. Thereafter, the temperature of the wash water immediately before flowing out of the water outlet port 92P can be finely adjusted by the secondary side sheathed heater 92T driven with a small driving power. As a result, even when low-temperature washing water is supplied to the heat exchanger 9, the occurrence of uneven temperature in the washing water flowing out from the heat exchanger 9 is suppressed.

(5-q-2) Second structural example of heat exchanger for preventing temperature unevenness In order to prevent the occurrence of temperature unevenness in the flowing out wash water, the heat exchanger 9 may have the following configuration. Good.

  FIG. 54 is a view for explaining another structural example of the flow path formed in the heat exchanger 9. FIG. 54 (a) shows a schematic plan view of the heat exchanger 9, and FIG. 54 (b) shows a cross section taken along line C54-C54 in FIG. 54 (a).

  As shown in FIG. 54 (a), in this description, the primary flow f1 of the cleaning water formed along the primary-side sheathed heater 91 and the secondary flow of cleaning water formed along the secondary-side sheathed heater 92 are shown. A flow path connecting the next flow path f2 is referred to as a connection flow path f3.

  As shown in FIG. 54 (b), in this example, the connection flow path f3 is formed so as to pass through the common tangent line of the outer peripheral surface of each of the copper tubes 91c, 92c of the primary side sheathed heater 91 and the secondary side sheathed heater 92. Is done.

  In this case, as indicated by the thick arrow in FIG. 54 (b), the wash water flowing while turning along the outer peripheral surface of the primary-side sheathed heater 91 in the primary flow path f1 smoothly flows into the connection flow path f3. Then, the washing water that has flowed into the connection flow path f3 smoothly flows into the secondary flow path f2 that surrounds the outer peripheral surface of the secondary-side sheathed heater 92.

  Thereby, in the heat exchanger 9, the flow of the wash water is smoothly maintained between the primary flow path f1 and the secondary flow path f2, and fluctuations in the flow rate of the wash water in the heat exchanger 9 are suppressed. The Thereby, generation | occurrence | production of the temperature nonuniformity of the wash water which flows out from the heat exchanger 9 is suppressed.

(5-r) Downsizing of Heat Exchanger As described above, the heat exchanger 9 of FIG. 29 includes the primary-side sheathed heater 91 and the secondary-side sheathed heater 92, so that the rated power is 1200 W. Compared with the case where a sheathed heater is provided, the size in the longitudinal direction is reduced. As a result, an increase in size of the main body 200 is suppressed.

  In order to reduce the size of the main body 200 of FIG. 3, the heat exchanger 9 may have the following configuration.

  55 is a diagram for describing a first configuration example for realizing miniaturization of the main body 200 of FIG. As shown in FIG. 55, in this example, the flow sensor 8 of FIG. Thereby, it is not necessary to separately provide the flow sensor 8 and the heat exchanger 9 inside the main body 200. As a result, the main body 200 can be reduced in size.

  56 is a diagram for explaining a second configuration example for realizing miniaturization of the main body 200 of FIG. As described with reference to FIG. 46, in order to prevent high-temperature washing water from flowing out from the heat exchanger 9, when the buffer tank BT is provided, the buffer tank BT is provided integrally with the heat exchanger 9. This eliminates the need to separately provide the buffer tank BT and the heat exchanger 9 inside the main body 200. As a result, the main body 200 can be reduced in size.

  Here, in the primary flow path f1 into which the cold wash water flows, a temperature difference is likely to occur between the vicinity of the outer surface of the primary sheathed heater 91 and the vicinity of the inner surface of the flow path forming tube 9T. However, as shown in FIG. 56, when the buffer tank BT is provided between the primary flow path f1 and the secondary flow path f2, the temperature of the cleaning water flowing from the primary side sheathed heater 91 to the secondary side sheathed heater 92 is shown. Unevenness is alleviated quickly.

  FIG. 57 is a diagram for explaining a third configuration example for realizing downsizing of the main body 200 of FIG. FIG. 57 is a cross-sectional view showing the structure around one end of the heat exchanger 9.

  As shown in FIG. 57 (a), at the ends of the primary sheathed heater 91 and the secondary sheathed heater 92 described with reference to FIG. 34, terminals 91b and 92b are arranged along the axial centers of the electrodes 91a and 92a. Is attached.

  In contrast, in this example, as shown in FIG. 57B, the portions of the electrodes 91a and 92a protruding from the copper tubes 91c and 92c are bent by about 90 degrees. Then, the terminals 91b and 92b are attached to the bent portions of the electrodes 91a and 92a. Thereby, the magnitude | size of the longitudinal direction of the heat exchanger 9 can be made small. As a result, the main body 200 can be downsized in a predetermined direction, and the main body 200 can be easily assembled.

  FIG. 58 is a diagram for explaining a fourth configuration example for realizing miniaturization of the main body 200 of FIG. FIG. 58 is a cross-sectional view showing a structure around one end of the heat exchanger 9.

  As shown in FIG. 58 (a), at the ends of the primary sheathed heater 91 and the secondary sheathed heater 92 described with reference to FIG. 34, terminals 91b and 92b are arranged along the axial centers of the electrodes 91a and 92a. Is attached.

  On the other hand, in this example, as shown in FIG. 58B, lead wires 91R and 92R are connected by spot welding to the ends of the electrodes 91a and 92a protruding from the copper tubes 91c and 92c. Thereby, the magnitude | size of the longitudinal direction of the heat exchanger 9 can be made small. As a result, the main body 200 can be downsized in a predetermined direction, and the main body 200 can be easily assembled.

(5-s) Arrangement of Heat Exchanger Inside Main Body The heat exchanger 9 is arranged in the horizontal direction so that the primary sheathed heater 91 and the secondary sheathed heater 92 are arranged vertically in the main body 200 of FIG. The toilet seat valve lid opening / closing device, which will be described later, is preferably provided above the heat exchanger 9. Thereby, the magnitude | size (depth) of the front-back direction of the main-body part 200 in the sanitary washing apparatus 100 is reduced.

(5-t) Control Method of Pump and Heat Exchanger As described above, the user operates the remote control device 300 in FIG. Pressure etc. can be adjusted.

  Here, when the user greatly changes the flow rate of the cleaning water sprayed to the local by operating the remote control device 300 during the local cleaning, the temperature of the cleaning water sprayed to the local of the user May fluctuate rapidly. A control method for preventing such a rapid temperature fluctuation of the washing water will be described.

  FIG. 59 is a diagram for describing a first control method for preventing rapid temperature fluctuations in the wash water ejected to the user's local area. In FIG. 59, the change of the flow volume of the washing water discharged from the pump 11 of FIG. 3 and the change of the temperature of the heat exchanger 9 are shown.

  When the control unit 90 controls the operation of the pump 11, there is almost no delay time from when the control unit 90 starts to control the pump 11 until the cleaning water discharge flow rate is actually adjusted.

  On the other hand, when the electric current which flows into the heat exchanger 9 increases, the temperature of the sheathed heaters 91 and 92 of the heat exchanger 9 rises first. Thereby, the temperature of the washing water flowing through the heat exchanger 9 rises (see the dotted line of the heat exchanger). When the current flowing through the heat exchanger 9 decreases, the temperature of the sheathed heaters 91 and 92 of the heat exchanger 9 decreases. Thereby, the temperature of the washing water flowing through the heat exchanger 9 is lowered (see the thick line of the heat exchanger). In this case, there is a delay time from the start of control of the heat exchanger 9 by the control unit 90 until the temperature of the cleaning water actually reaches the predetermined temperature.

  In this example, the control unit 90 performs control so that a similar delay time is generated in the change in the discharge flow rate of the pump 11 in accordance with the delay time in the temperature change of the cleaning water generated in the heat exchanger 9 (dotted line of the pump flow rate). And bold lines). Thereby, the rapid temperature fluctuation of the washing water ejected to the user's local area is prevented.

  FIG. 60 is a diagram for describing a second control method for preventing rapid temperature fluctuations in the wash water ejected to the user's local area. In FIG. 60, the change of the flow volume of the wash water discharged from the pump 11 of FIG. 3 and the change of the temperature of the heat exchanger 9 are shown.

  As shown in FIG. 60, the controller 90 temporarily cuts off the current flowing through the sheathed heaters 91 and 92 of the heat exchanger 9 when the flow rate of the washing water ejected by the user is reduced (heat exchanger). (See bold line).

  As a result, the heat of the sheathed heaters 91 and 92 is dissipated in the washing water passing through the inside of the heat exchanger 9. Thereby, the sheathed heaters 91 and 92 can be rapidly cooled. Further, when the heat exchanger 9 raises the temperature of the cleaning water again, the temperature of the cleaning water is prevented from suddenly increasing.

  When increasing the flow rate of the cleaning water ejected to the user, the controller 90 temporarily increases the current flowing through the sheathed heaters 91 and 92 of the heat exchanger 9 (see the dotted line of the heat exchanger).

  Thereby, when the control unit 90 controls the operation of the pump 11, the temperature of the cleaning water is quickly and accurately adjusted in response to a change in the discharge flow rate of the cleaning water by the pump 11. In this way, rapid temperature fluctuations in the wash water sprayed to the user's local area are prevented.

  FIG. 61 is a diagram for describing a third control method for preventing rapid temperature fluctuations in the wash water ejected to the user's local area. In FIG. 61, it is one of the factors that determine the change in the actual discharge flow rate of the wash water discharged from the pump 11 in FIG. 3 and the energization amount to the heat exchanger 9, and is based on the signal from the flow sensor 8 in FIG. The calculated change in the set flow rate is shown.

  As shown in FIG. 61, when the flow rate of the cleaning water is decreased, the set flow rate is temporarily decreased rapidly (see the thick line of the set flow rate). Thereby, the energization amount to the heat exchanger 9 is lowered from the set value, and the sheathed heaters 91 and 92 can be cooled quickly. Further, when the heat exchanger 9 raises the temperature of the cleaning water again, the temperature of the cleaning water is prevented from suddenly rising.

  Further, when increasing the flow rate of the cleaning water, the set flow rate is temporarily increased rapidly (see the dotted line of the set flow rate). Thereby, the energization amount to the heat exchanger 9 will be raised from a set value, and the temperature of the sheathed heaters 91 and 92 can be raised rapidly.

  Thereby, when the control unit 90 controls the operation of the pump 11, the temperature of the cleaning water is quickly and accurately adjusted in response to a change in the discharge flow rate of the cleaning water by the pump 11. In this way, rapid temperature fluctuations in the wash water sprayed to the user's local area are prevented.

(5-u) Another Example of Heat Exchanger FIG. 62 is a diagram illustrating another example of the heat exchanger 9 of FIG. FIG. 62A shows a partially cutaway sectional view of the heat exchanger 9 of this example.

  As shown in FIG. 62A, a meandering pipe 910 that is bent is embedded in the resin case 904. A flat ceramic heater 905 is provided so as to contact the meandering pipe 910. As indicated by the arrow YS, the cleaning water is supplied into the meandering pipe 910 from the water supply port 912P, and is efficiently heated by the ceramic heater 905 while flowing through the meandering pipe 910, and is discharged from the outlet 913P.

  The control unit 90 in FIG. 3 feedback-controls the temperature of the ceramic heater 905 of the heat exchanger 9 based on the temperature measurement value given from the hot water temperature sensor 98.

  Three power terminals 906a, 906b, 906c are connected to the ceramic heater 905.

  FIG. 62B shows a heater pattern of the ceramic heater 905. As shown in FIG. 62 (b), in the heater pattern 905H, the two branch wirings 905m and 906n branching from the first terminal portion 905a extend so as to meander together.

  The end portions of the branch wirings 905m and 906n form a second terminal portion 905b and a third terminal portion 905c.

  Accordingly, the branch wiring 905m generates heat by causing a current to flow between the first terminal portion 905a and the second terminal portion 905b. Further, when a current is passed between the first terminal portion 905a and the third terminal portion 905c, the branch wiring 905n generates heat.

  In this manner, the branch wirings 905m and 905n can be individually driven by causing a current to flow individually between the terminals of the first terminal portion 905a, the second terminal portion 905b, and the third terminal portion 905c. it can. Therefore, a driving method similar to that of the sheathed heaters 91 and 92 described above can be used.

  The control unit 90 may control the temperature of the ceramic heater 905 by feedforward control, or controls the ceramic heater 905 by feedforward control when the temperature rises, and controls the ceramic heater 905 by feedback control when steady. You may perform complex control to control.

  <6> Configuration of Nozzle Unit 20 FIG. 63 is an external perspective view of the nozzle unit 20.

  As shown in FIGS. 63A and 63B, the nozzle unit 20 includes a butt nozzle 21, a bidet nozzle 22, and a nozzle cleaning nozzle 23. The nozzle guide base 24 is provided with a butt nozzle 21 and a bidet nozzle 22 so as to advance and retreat. A nozzle tip housing portion 25 is provided at the tip portion of the nozzle guide base 24. A nozzle housing lid 25a is attached to the opening of the nozzle tip housing portion 25 so as to be openable and closable.

  63A shows a state in which the buttocks nozzle 21 and the bidet nozzle 22 are accommodated in the nozzle guide base 24 and the nozzle tip accommodating portion 25, and FIG. 63B shows that the buttocks nozzle 21 and the bidet nozzle 22 are separated from the nozzle tip accommodating portion 25. The protruding state is shown.

  The position of the butt nozzle 21 when the tip of the butt nozzle 21 is located at the position of the tip of the nozzle tip container 25 is referred to as a nozzle storage position SP1, and the tip of the butt nozzle 21 protrudes from the tip of the nozzle tip container 25 by a predetermined length. The position of the butt nozzle 21 when it is in the position is referred to as a standard cleaning position SP2. The position of the butt nozzle 21 when the tip of the butt nozzle 21 is a predetermined length ahead of the standard cleaning position SP2 is referred to as a front cleaning position SP3, and the tip of the butt nozzle 21 is a predetermined length behind the standard cleaning position SP2. The position of the buttocks nozzle 21 in a certain case is referred to as a rear cleaning position SP4.

  The standard cleaning position, the front cleaning position, and the rear cleaning position of the bidet nozzle 22 are ahead of the standard cleaning position, the front cleaning position, and the rear cleaning position of the butt nozzle 21 by a predetermined length.

  In the buttocks cleaning, the buttocks nozzle 21 moves between the nozzle storage position SP1, the rear cleaning position SP4, the standard cleaning position SP2, and the front cleaning position SP3 by the rotation of the nozzle drive motor 20m. Similarly, during bidet cleaning, the bidet nozzle 22 moves between the nozzle storage position, the rear cleaning position, the standard cleaning position, and the front cleaning position by the rotation of the nozzle drive motor 20m.

<7> Configuration and Layout of Main Body (7-a) Internal Structure and Casing of Main Body 200 FIGS. 64 and 65 are external perspective views showing the internal structure of the main body 200 of FIG. 64 is an example of the main body 200 including the heat exchanger 9 using a sheathed heater, and is an example of the main body 200 including the heat exchanger 9 using the ceramic heater of FIG.

  As shown in FIGS. 64 and 65, the main body 200 includes a main body lower casing 200A. The main body lower casing 200A is formed by mixing polypropylene raw materials (20%) and recycled materials (80%). This can contribute to environmental protection. In this case, since the main body lower casing 200A is not visually recognized by the user, there is no problem in design due to the use of the recycled material.

  The main body lower casing 200A is divided into a first main body region 201X and a second main body region 202X as indicated by a one-dot chain line CL.

  The first main body region 201X is provided with a water supply connection portion 1IN through which washing water flows, a heat exchanger 9, a nozzle portion 20 and a toilet nozzle 40, and a vacuum breaker BB. The nozzle unit 20 is inserted into an opening formed in the main body lower casing 200A. The opening is located above the bowl surface of the toilet bowl 700. Thereby, even if a water leak occurs in the main body 200, the leaked water falls into the toilet bowl 700 through the opening. Therefore, water leakage is prevented from wetting the floor in the toilet room.

  A substrate case 240 is attached to the back side of the first main body region 201X. Details of the substrate case 240 will be described later.

  In the second main body region 202X, a drying unit 210, a deodorizing unit 220, and a printed board 230 are provided.

  In this way, water-related components are arranged in the first main body region 201X, and wind-related components are arranged in the second main body region 202X. Thereby, it is possible to share the water leakage countermeasures of the water-related components and the dust countermeasures of the wind-related components. As a result, reliability and ease of assembly are improved.

  66 is a diagram showing a main body upper casing of the main body 200 of FIG.

  As shown in FIG. 66, the main body upper casing 200B is made of polypropylene. A decorative board 200C made of acrylic is attached to the upper surface of the main body upper casing 200B with hot melt resin. As a result, a beautiful appearance can be realized and the design is improved.

  The main body upper casing 200B has an inner surface 201 and an outer surface 202 on both sides. A toilet seat connection portion 244 is formed on the inner side surface 201, and a lid connection portion 250 is formed on the outer side surface 202. A toilet seat temperature adjustment lamp RA1 and a sterilization lamp RA2 are provided on the upper part of the main body upper casing 200B.

  The toilet seat temperature adjustment lamp RA1 is turned off when a toilet seat heater 450, which will be described later, is turned off, lights up in green when the toilet seat heater 450 is warmed up, and changes from flashing orange to lighting up when the toilet seat heater 450 is heated up. Thereby, the user can recognize the current state of the toilet seat heater 450, which is convenient.

  The sterilization lamp RA2 is turned off when the sterilization operation is off, flashes blue during the sterilization operation, and lights blue when sterilization standby. Thereby, a user can get a sense of security. In addition, since the user can recognize that the sterilization operation is being performed, it is possible to prevent the automatic operation from being mistaken for a failure.

  Further, a sleeve portion 291 is provided on a side portion of the main body upper casing 200B. A main body operation part 295 is provided on the inclined upper surface of the sleeve part 291. A part of the main body operation unit 295 serves as a lid stopper unit 292. The main body operation unit 295 is provided with an infrared light receiving unit / leakage breaker test button 293. The infrared light receiving unit / leakage breaker test button 293 receives an infrared signal from the remote operation device 300 and transmits various operation signals based on the infrared signal to the control unit 90.

  In this case, since the infrared light receiving unit and the earth leakage breaker test button are used together, the main body operation unit 295 can be downsized, and the visibility and operability are improved.

  The main body upper casing 200B is attached to the main body lower casing 200A shown in FIGS.

(7-b) Appearance of Main Body 200 FIGS. 67 and 68 are external perspective views of the main body 200 to which the toilet seat 400 and the lid 500 are attached. 67A and 67B show a state where the lid 500 is closed, and FIG. 68 shows a state where the lid 500 is opened.

  As shown in FIG. 67, the lid portion 500 is rotatably attached to the lid connection portion 250 (see FIG. 66) of the main body upper casing 200B. Further, as shown in FIG. 68, the toilet seat 400 is rotatably attached to the toilet seat connecting portion 244 (see FIG. 66) of the main body upper casing 200B.

  In this case, a part of the main body operation unit 295 of the main body unit 200 serves as a lid stopper unit 292, which prevents the lid unit 500 from opening more than a certain angle. On the back of the main body 200, there may be provided a water reservoir called a low tank that discharges the water in the toilet 700 after defecation. The lid stopper portion 292 is used to prevent the lid portion 500 from colliding with the low tank and generating sound when the lid portion 500 opens more than a specified angle. Thus, since the main body operation part 295 also serves as the lid stopper part 292, it is not necessary to provide a separate lid stopper part. Therefore, the main body 200 can be easily cleaned, and the main body 200 can be maintained in a sanitary manner. Moreover, since the main body operation part 295 is inclined, the visibility and operability in a state where the user is seated on the toilet seat part 400 are improved, and the appearance is good.

  69 is a longitudinal sectional view taken along line C67-C67 of FIG. 67 (b). A substrate case 240 is provided in the main body upper casing 200B. A nonflammable mica plate 241 is disposed at the bottom of the substrate case 240, and the printed circuit board 230 is disposed on the mica plate 241 at a predetermined interval. The mica plate 241 and the printed circuit board 230 are sealed with a resin 240V.

  In addition, a non-combustible mica plate 251 is disposed on the inner upper surface of the main body upper casing 200 </ b> B and bonded with a non-combustible glass tape 252.

  Thus, since the printed circuit board 230 is surrounded by the incombustible mica plates 241 and 251 and the incombustible glass tape 252, there is no possibility of the printed circuit board 230 being ignited.

<8> Toilet Seat Device (8-a) Configuration of Toilet Seat Device FIG. 70 is a schematic diagram illustrating the configuration of the toilet seat device 110. As described above, the toilet seat device 110 includes the main body 200, the remote control device 300, the toilet seat 400, and the entrance detection sensor 600.

  As shown in FIG. 70, the main body unit 200 includes a control unit 90, a temperature measurement unit 401, a heater driving unit 402, a toilet seat temperature adjustment lamp RA1, and a seating sensor 610.

  The toilet seat 400 includes a toilet seat heater 450 and a thermistor 401a.

  The control unit 90 is composed of, for example, a microcomputer, and includes a determination unit that determines the user's entrance and the temperature of the toilet seat 400, a timer unit having a timer function, a storage unit that stores various information, and a heater driving unit 402. Including an energization rate switching circuit for controlling the operation.

  The temperature measuring unit 401 of the main body 200 is connected to the thermistor 401 a of the toilet seat 400. Thereby, the temperature measurement part 401 measures the temperature of the toilet seat part 400 based on the signal output from the thermistor 401a. Hereinafter, the temperature of the toilet seat 400 measured by the temperature measuring unit 401 through the thermistor 401a is referred to as a measured temperature value.

  Further, the heater driving unit 402 of the main body 200 is connected to the toilet seat heater 450 of the toilet seat 400. As a result, the heater driving unit 402 drives the toilet seat heater 450.

  In the present embodiment, toilet seat device 110 operates as follows. At the time of initial setting, the temperature of the toilet seat 400 is adjusted to about 18 ° C., for example, by the control unit 90 controlling the heater driving unit 402. The temperature at this time is referred to as a standby temperature.

  Here, when the user operates the toilet seat temperature adjustment switch 333 of the remote control device 300, the toilet seat set temperature is transmitted to the control unit 90. The control unit 90 stores the toilet seat set temperature received from the remote operation device 300 in the storage unit.

  When the user enters the toilet room, the entry detection sensor 600 detects the entry of the user. As a result, a user entry detection signal is transmitted to the control unit 90.

  Next, the operation during normal use will be described. The determination unit of the control unit 90 detects the user's entry into the toilet room based on the entry detection signal from the entry detection sensor 600. Therefore, the determination unit selects a specific heater control pattern related to driving of the toilet seat heater 450 based on the measured temperature value of the toilet seat unit 400 and the toilet seat set temperature stored in the storage unit.

  The energization rate switching circuit controls the operation of the heater driving unit 402 based on the selected heater control pattern and time information obtained by the time measuring unit.

  Accordingly, the toilet seat heater 450 is driven by the heater driving unit 402, and the temperature of the toilet seat 400 is instantaneously increased to the toilet seat set temperature.

(8-b) First Example of Toilet Seat 400 FIG. 71 is an exploded perspective view of the toilet seat 400. FIG. 72A is a plan view of the toilet seat heater 450 of the toilet seat 400 of the first example, and FIG. 72B is an enlarged view of a region C72 of FIG. 72A. FIG. 73 is a plan view of the toilet seat 400 of the first example. 74 is a C73-C73 cross-sectional view of the toilet seat 400 of FIG.

  As shown in FIG. 71, the toilet seat 400 includes a substantially elliptical upper toilet seat casing 410 formed mainly of aluminum, a substantially horseshoe-shaped toilet seat heater 450, and a substantially elliptical lower toilet seat casing 420 formed of a synthetic resin. Prepare.

  Hereinafter, the front side viewed from the seated user is defined as the front portion of the toilet seat 400, and the rear side viewed from the seated user is defined as the rear of the toilet seat 400.

  As shown in FIG. 72A and FIG. 73, the toilet seat heater 450 is formed in a substantially horseshoe shape with a part of the front portion cut off. The toilet seat heater 450 may have a substantially oval shape. The toilet seat heater 450 includes metal foils 451 and 453 made of, for example, aluminum and a linear heater 460.

  The linear heater 460 is disposed in a meandering manner in accordance with the shape of the upper toilet seat casing 410 in the region from the seat center portion SE3 to the seat one end portion SE1 and in the region from the seat center portion SE3 to the seat other end portion SE2. .

  Specifically, the linear heater 460 is formed to have U-shaped portions of about six rows on the left and right. These U-shaped parts are arranged in parallel substantially along the direction of the thigh of the seated user. The interval between the linear heaters 460 in each U-shaped portion is about 5 mm.

  The heater start end portion 460 a and the heater end portion 460 b of the linear heater 460 are respectively connected to lead wires 470 drawn from one side of the rear portion of the toilet seat 400.

  Further, as shown in FIG. 72 (b), a plurality of bent portions CU serving as thermal stress buffering portions are provided in the path of the meandering linear heater 460.

  As shown in FIG. 74, the distance ds1 of the linear heater 460 in the region G1 along the outer side of the upper toilet seat casing 410 and the distance ds3 of the linear heater 460 in the region G3 along the inner side are It is set to be smaller than the distance ds2 between the linear heaters 460 in the central region G2 of the toilet seat casing 410. Thereby, in the area | region G1 along the outer side edge of the upper toilet seat casing 410, and the area | region G3 along the inner side edge, the linear heaters 460 are arranged densely compared with the area | region G2 of a center part.

(8-c) Second Example of Toilet Seat 400 FIG. 75 (a) is a plan view of the toilet seat heater 450 of the toilet seat 400 of the second example, and FIG. 75 (b) is a region of FIG. 75 (a). FIG. 76 is an enlarged view of C77, and FIG. 76 is a plan view of the toilet seat 400 of the second example.

  As shown in FIGS. 75A and 76, the linear heater 460 has an upper toilet seat casing in the region from the seat center portion SE3 to the seat one end portion SE1 and in the region from the seat center portion SE3 to the seat other end portion SE2. It is arranged in a meandering shape that meanders in the left-right direction according to the shape of 410. In this example, the linear heater 460 is disposed so that the meandering bent portion is positioned in the vicinity of the outer side and the inner side of the upper toilet seat casing 410.

  Specifically, the linear heater 460 extends while meandering left and right from one side of the rear portion of the toilet seat heater 450 to the vicinity of the seat one end SE1, thereby forming the first series A meandering shape of FIG. 75 (b). Is done. Further, the linear heater 460 meanders from the vicinity of the sheet one end part SE1 to the left and right while extending to the vicinity of the sheet other end part SE2 through the vicinity of the sheet center part SE3, thereby forming the second series B meandering shape. Is done. Further, the linear heater 460 extends from the vicinity of the seat other end portion SE2 to the one side of the rear portion of the toilet seat heater 450 through the vicinity of the seat center portion SE3, thereby forming a first series A meandering shape.

  Further, as shown in FIG. 75B, the first series A meandering linear heater 460 and the second series B meandering linear heater 460 are arranged substantially in parallel. The first series A and second series B meandering linear heaters 460 are continuous from the heater start end 460a to the heater end end 460b.

  The heater start end portion 460 a and the heater end portion 460 b of the linear heater 460 are respectively connected to lead wires 470 drawn from one side of the rear portion of the toilet seat 400.

  In this example, the linear heater 460 has a meandering shape in which a bent portion is positioned in the vicinity of the inner side of the toilet seat heater 450 and in the vicinity of the outer side. Thereby, the space | interval between bending parts is short. Therefore, since the length change resulting from thermal expansion and thermal contraction is small, even if the linear heater 460 expands and contracts, the strain due to expansion and contraction is absorbed and buffered at the bending portion. As a result, the stress resulting from the thermal expansion and contraction of the linear heater 460 is reduced, and damage due to long-term use can be suppressed.

  In addition, since the thermal expansion and contraction of the linear heater 460 is small, the adhesion to the metal foils 451 and 453 can be maintained satisfactorily for a long time. Thereby, heating of the toilet seat heater 450 can be performed efficiently and reliably.

  Further, as shown in FIG. 75 (b), the lengths La and Lb of the bent portions and the interval S between the bent portions can be arbitrarily adjusted. Thereby, the heating distribution of the toilet seat heater 450 can be adjusted.

  For example, the lengths La and Lb of the bent portions and the spacing S between the bent portions are adjusted so that the heating density in the vicinity of the outer side and the inner side of the toilet seat heater 450 is higher than the heating density in the central portion of the toilet seat heater 450. To do. Thereby, the uniform heating temperature can be maintained in the entire region of the toilet seat heater 450.

  In this example, the current direction in the first series A meandering linear heater 460 is opposite to the current direction in the first series B meandering linear heater 460. Thereby, the electromagnetic waves generated from the linear heaters 460 cancel each other. As a result, generation of noise is prevented.

(8-d) Third Example of Toilet Seat 400 FIG. 77 (a) is a plan view of the toilet seat heater 450 of the toilet seat 400 of the third example, and FIG. 77 (b) is one of FIG. 77 (a). It is an expanded sectional view of a part.

  As shown in FIG. 77 (a), temperature measuring portions 450T in which the linear heaters 460 meander at high density are formed on both sides of the rear portion of the toilet seat heater 450, respectively. As shown in FIG. 77 (b), one thermometry section 450T is provided with a resettable thermostat 450Q using bimetal or the like. The other temperature detecting section 450T is provided with a non-returnable thermostat 450Q using a thermal fuse or the like.

  For example, when the toilet seat heater 450 reaches an unexpected abnormal temperature, the energization is temporarily stopped by opening the return thermostat 450Q. In addition, when the reset thermostat 450Q causes a failure or the like and the toilet seat heater 450 attempts to reach a dangerous temperature, the non-reset thermostat 450Q is opened to cut off the supply of electric power.

  Here, it is desirable that the operating temperature setting of the thermostat 450Q or the thermal fuse for preventing overheating is set lower than the temperature at which it is actually desired to shut off. The toilet seat having the configuration described in the present embodiment has a high rate of temperature increase. Therefore, depending on the operating speed of the safety device (for example, the thermostat 450Q or the thermal fuse), the toilet seat surface may be at a temperature higher than the preset temperature at the timing when the energization is actually stopped. Because there is. Of the human skin, the skin of the buttocks and thighs that are not normally exposed are more sensitive than the skin of other parts. Thereby, a higher safety design as described above becomes important.

(8-e) Fourth Example of Toilet Seat 400 FIG. 78 is a plan view of the toilet seat heater 450 of the toilet seat 400 in the fourth example.

  As shown in FIG. 78, a linear heater 460 arranged in a region from the sheet center part SE3 to the left sheet one end part SE1, and a linear pattern arranged in a region from the sheet center part SE3 to the sheet other end part SE2. The heater 460 is separated from each other.

  The heater start end portion 460a and the heater end portion 460b of the one linear heater 460 are connected to lead wires 470 drawn from one side of the rear portion of the toilet seat 400, respectively. The heater start end portion 460 c and the heater end portion 460 d of the other linear heater 460 are respectively connected to lead wires 470 drawn from the other side of the rear portion of the toilet seat 400.

(8-f) Example of Structure of Toilet Seat Heater 450 FIG. 79 is a cross-sectional view showing an example of the structure of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  As shown in FIG. 79, the upper toilet seat casing 410 is formed of, for example, an aluminum plate 413 having a thickness of 1 mm. An alumite layer 412 and a surface decorative layer 411 are formed on the upper surface of the aluminum plate 413. The upper surface of the surface decorative layer 411 becomes the seating surface 410U. A coating film 414 is formed on the lower surface of the aluminum plate 413. The coating film 414 is a polyester powder coating film having a film thickness of 40 μm and heat resistance of 150 ° C., for example.

  Instead of the aluminum plate 413, one or more of a copper plate, a stainless steel plate, an aluminum plated steel plate, and a zinc aluminum plated steel plate may be used.

  A metal foil 451 made of, for example, aluminum is attached to the lower surface of the coating film 414 via an adhesive layer 452a. The film thickness of the metal foil 451 is, for example, 50 μm.

  The linear heater 460 includes a heating wire 463a having a circular cross section, an enamel layer 463b, and an insulating coating layer 462. The outer peripheral surface of the heating wire 463a having a circular cross section is sequentially covered with the enamel layer 463b and the insulating coating layer 462. The enamel wire 463 is constituted by the heating wire 463a and the enamel layer 463b.

  The heating wire 463a has a diameter of 0.16 to 0.25 mm, for example, and is made of copper or a copper alloy. In this example, a high tensile strength heater wire made of 4% Ag—Cu alloy having a diameter of 0.176 mm is used as the heating wire 463a. The resistance value is 0.833 Ω / m.

  The enamel layer 463b is made of, for example, polyesterimide (PEI) having heat resistance of 180 to 300 ° C. The film thickness of the enamel layer 463b is 20 μm or less, and is 12 to 13 μm in this example. Such an enameled wire 463 sufficiently secures an electrical withstand voltage performance of 1 minute or more at 1000 V, which is an electrical equipment technical standard, even if the enamel layer 463b has a very thin film thickness of about 0.01 to 0.02 mm. be able to. Alternatively, polyimide (PI) or polyamideimide (PAI) may be used as the material for the enamel layer 463b.

  The insulating coating layer 462 is made of a fluororesin such as a perfluoroalkoxy mixture (hereinafter referred to as PFA) having heat resistance of 260 ° C., for example. The thickness of the insulating coating layer 462 is, for example, 0.1 to 0.15 mm. The insulating coating layer 462 made of PFA can be formed by extrusion. In this case, even if the thickness of the insulating coating layer 462 is as thin as 0.05 to 0.1 mm, it is possible to ensure electrical withstand voltage performance that can withstand lightning surge.

  Note that polyimide (PI) or polyamideimide (PAI) may be used as the material of the insulating coating layer 462.

The outer diameter of the linear heater 460 is, for example, 0.46 to 0.50 mm. The power density of the linear heater 460 is, for example, 0.95 W / cm ² .

  The linear heater 460 is attached to the metal foil 451 so as to be covered with an adhesive layer 452b and a metal foil 453 made of, for example, aluminum. The film thickness of the metal foil 453 is, for example, 50 μm.

  In this manner, a double insulation structure can be ensured by forming the insulating coating layer 462 on the single enamel wire 463.

  Further, sufficient insulation can be obtained even if the insulating coating layer 462 is relatively thin. Therefore, the thickness of the insulating coating layer 462 can be reduced. In the above example, the thickness of the resin layer (enamel layer 463b and insulating coating layer 462) of the linear heater 460 is about 0.12 mm and is extremely thin. In this case, heat conduction from the heating wire 463a to the metal foil 451 and the toilet seat casing 410 can be performed very agile.

  Incidentally, in the conventional toilet seat device, the thickness of the covering tube made of silicone rubber, vinyl chloride or the like of the linear heater is about 1 mm, which is about 10 times that of the above example. The heat conduction rate of such a coated tube was extremely slow, and the temperature raising rate of the toilet seat could not be increased.

  In the conventional toilet seat device, when a large electric power is supplied to the heater wire in order to forcibly increase the temperature raising rate of the toilet seat, the coated tube is melted and burnt out as in the case where the temperature of the heater wire is increased in the heat insulating state. Therefore, raising the temperature of the toilet seat by such a method has not been practical.

  On the other hand, when the enameled wire 463 having excellent heat resistance as in this example is used as a heater wire, the temperature of the toilet seat can be raised in a sufficiently short time, and electrical insulation and safety can be ensured. Therefore, the structure of this example can be effectively used for various toilet seat devices.

  In the structure of this example, the resin layer composed of the enamel layer 463b and the insulating coating layer 462 can be formed with a thin thickness of about 0.1 to 0.4 mm. Thus, the temperature of the toilet seat can be rapidly raised while the absolute temperature of the heating wire 463a and the resin layer is maintained at a low temperature. As a result, a relatively inexpensive insulating material can be used instead of an expensive heat-resistant insulating material.

  In this example, in order to efficiently transfer the heat of the linear heater 460 to the toilet seat casing 410, the linear heater 460 is sandwiched between aluminum foils 451 and 452. Here, in the linear heater 460 of this example, since the enamel layer 463b and the insulating coating layer 462 can be thinned, the outer diameter of the linear heater 460 can be reduced (about φ0.2 to φ0.4). In this case, when the aluminum foil 451 and the aluminum foil 452 are bonded together, the air layer between the aluminum foil 451 and the aluminum foil 452 can be reduced, and wrinkles of the aluminum foils 451 and 452 can be reduced. it can. Thereby, the local high heat of the enamel wire 463 is suppressed, and the disconnection of the enamel wire 463 and the damage to the electrical insulating layer (enamel layer 463b and the insulating coating layer 462) are prevented. As a result, the service life of the toilet seat device 110 can be extended.

  Further, since the enamel wire 463 can be made thin, the weight of the toilet seat heater 450 can be reduced, and the toilet seat opening / closing torque can be reduced. Thereby, the electric opening / closing unit for opening and closing the toilet seat can be downsized, and the toilet seat device 110 can be downsized.

(8-g) Other Examples of Structure of Toilet Seat Heater 450 FIG. 80 is a cross-sectional view showing another example of the structure of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  In the example of FIG. 80, a plurality of enamel wires 463 are twisted and covered with an insulating coating layer 462. Each enamel wire 463 is constituted by, for example, a heating wire 463a having a diameter of 0.1 mm and an enamel layer 463b having a thickness of 10 μm.

  Thus, a double insulation structure can be ensured by forming the insulation coating layer 462 so as to surround the bundle of the plurality of enamel wires 463.

  In the example of FIG. 80, seven enamel wires 463 are twisted, but the number of enamel wires 463 is not limited to seven. For example, two heating wires 463a (hereinafter referred to as a single heating wire 463a) that are not covered with the two enamel wires 463 and the enamel layer 463b may be twisted together.

  In this configuration, for example, when one enamel layer 463b of the two enamel wires 463 is broken down due to local high heat or the like, the heating wire 463a of the enamel wire 463 and the single heating wire 463a described above Are electrically connected. Therefore, according to this configuration, the dielectric breakdown of the enamel layer 463b can be detected by using the single heating wire 463a as the dielectric breakdown detection line. Thereby, when the enamel layer 463b of any one of the two enamel wires 463 is broken down, the energization to all the heating wires 463a can be cut off.

  That is, even if the enamel layer 463b of any enamel wire 463 is broken down by local high heat or the like by making at least one of the plurality of stranded wires non-insulated wires without the enamel layer 463b, Dielectric breakdown can be detected quickly. Thereby, it is possible to safely cut off the power supply to the heating wire 463a.

  In the above description, the case where a plurality of enamel wires 463 are twisted together has been described. However, a plurality of enamel wires 463 may be simply bundled.

  Further, the direction of the current flowing through the predetermined number of the heating lines 463a among the plurality of heating lines 463a may be reversed from the direction of the current flowing through the remaining heating lines 463a. In this case, the magnetic field generated by the current flowing in one direction and the magnetic field generated by the current flowing in the other direction cancel each other. Thereby, generation | occurrence | production of a leakage magnetic field and generation | occurrence | production of noise can be suppressed.

(8-h) Still Another Example of the Structure of the Toilet Seat Heater 450 FIG. 81 is a cross-sectional view illustrating still another example of the structure of the toilet seat heater 450 attached to the upper toilet seat casing 410.

  In the example of FIG. 81, a heat resistant insulating layer 455 is formed between the metal foil 451 and the adhesive layer 452b. Further, a heat resistant insulating layer 456 is formed between the adhesive layer 452b and the metal foil 453. The heat-resistant insulating layer 455 is made of, for example, polyethylene terephthalate (PET) having a heat resistance of 150 ° C. and a film thickness of 12 to 25 μm. Similarly, the heat-resistant insulating layer 455 is made of PET having a heat resistance of 150 ° C. and a film thickness of 12 to 25 μm, for example.

  In this manner, a triple insulation structure can be secured by forming the insulating coating layer 462 on the single enamel wire 463 and forming the heat resistant insulating layers 455 and 456.

  In the toilet seat heater 450 of FIG. 81, a bundle of a plurality of enamel wires 463 may be used instead of the single enamel wire 463.

(8-i) Covering Thickness of Heating Wire 463a FIG. 82 is a diagram showing a measurement result of the relationship between the coating thickness of the heating wire 463a and the temperature rise of each part of the toilet seat 400. In FIG. 82, the horizontal axis represents the coating thickness of the heating wire 463a, and the vertical axis represents the temperature increase value [K] 6 seconds after the start of energization.

  For the measurement, a toilet seat heater 450 having the structure of FIG. 81 was used. The coating thickness of the heating wire 463a is the thickness between the heating wire 463a and the aluminum plate 413. In this example, the total thickness of the enamel layer 463b, the heat-resistant insulating layer 455, the adhesive layer 452a, and the coating film 414 It is.

  Here, the temperature rise of the seating surface 410U of the toilet seat 400, which is about 10K in 6 seconds, was regarded as the practical temperature rise performance, and the temperature rise of about 13K in 6 seconds was taken as the target temperature rise performance.

  In FIG. 82, a circle mark is a temperature rise value of the seating surface 410U of the toilet seat 400, a triangle mark is a temperature rise value of the metal foil 451 made of aluminum, and a square mark is a temperature rise value of the insulating coating layer 462. .

  From the results of FIG. 82, it is understood that practical temperature rise performance is obtained when the coating thickness of the heating wire 463a is 0.4 mm or less. It can also be seen that the target temperature rise performance is obtained when the coating thickness of the heating wire 463a is 0.2 mm or less. Therefore, the coating thickness of the heating wire 463a is preferably 0.4 mm or less, and more preferably 0.2 mm or less.

(8-j) Material of Insulating Coating Layer 462 Next, an AC voltage of 100 V was applied to three types of toilet seat heaters 450 having the structure shown in FIG. 81, and the temperature of the heating wire 463a was measured.

  In the first toilet seat heater 450, PFA having a film thickness of 100 μm and a heat resistant temperature of 260 ° C. is used as the material of the insulating coating layer 462, and PET having a film thickness of 25 μm and a heat resistant temperature of 150 ° C. is used as the material of the heat resistant insulating layers 455 and 456, respectively. It was. In the second toilet seat heater 450, a PI winding coating having a film thickness of 35 to 40 μm and a heat resistant temperature of 350 ° C. is used as the material of the insulating coating layer 462, and a film thickness of 25 μm and a heat resistant temperature of 150 ° C. are used as the material of the heat resistant insulating layers 455 and 456, respectively. PET was used. In the third toilet seat heater 450, a PI winding coating having a film thickness of 35 to 40 μm and a heat resistant temperature of 350 ° C. is used as the material for the insulating coating layer 462, and a film thickness of 3 to 6 μm and a heat resistant temperature are used as the material for the heat resistant insulating layers 455 and 456, respectively. A 90 ° C. acrylic resin was used.

  For the first toilet seat heater 450, the temperature of the heating wire 463a was 162.3 ° C., which is lower than the heat resistance temperature 260 ° C. of the insulating coating layer 462 made of PFA. For the second toilet seat heater 450, the temperature of the heating wire 463a was 155.4 ° C., which is lower than the heat resistance temperature 350 ° C. of the insulating coating layer 462 made of PI. For the third toilet seat heater 450, the temperature of the heating wire 463a was 125.7 ° C., which is lower than the heat resistance temperature 350 ° C. of the insulating coating layer 462 made of PI.

  From these results, it was found that not only PFA but also other resins such as PI can be used as the material of the insulating coating layer 462.

(8-k) Connection Method Between Linear Heater 460 and Lead Wire 470 FIG. 83 is a diagram showing a connection method between the linear heater 460 and the lead wire 470. FIG. 84 is a cross-sectional view of the connection portion between the linear heater 460 and the lead wire 470. FIG. 85 is a diagram showing a heat caulking method.

  As shown in FIGS. 83 and 84, the core wire of the lead wire 470 is connected to the terminal 471. The terminal 471 is bent into a U shape, and the bent tip of the linear heater 460 is inserted into the U-shaped bent portion of the terminal 471.

  In this state, as shown in FIG. 85, the U-shaped bent portion of the terminal 471 is sandwiched between the pair of electrodes EL1, EL2. A current is supplied from the transformer TS to the terminal 471 and the linear heater 460 through the electrodes EL1 and EL2 while pressing the U-shaped bent portion of the terminal 471 with the pair of electrodes EL1 and EL2. Thereby, as shown in FIG. 84, the insulating coating layer 462 and the enamel layer 463b of the linear heater 460 are melted. As a result, the heating wire 463a of the linear heater 460 contacts the terminal 471 at the contact point 463C.

  As shown in FIG. 83, a heat-resistant sheet 480 made of a polyimide thin film having a thickness of 12 μm, for example, is wound around the connection portion 475 between the terminal 471 of the lead wire 470 and the linear heater 460 two or three times. Furthermore, the connection part 475 between the terminal 471 of the lead wire 470 and the linear heater 460 is covered with a silicone resin, and is sandwiched between the metal foils 451 and 453 of FIGS.

  Thus, the heat of the heating wire 463a of the linear heater 460 is conducted to the metal foils 451 and 453 and the terminal 471 of the lead wire 470. Thereby, local overheating and disconnection of the heating wire 463a are prevented, and the heat uniformity of the toilet seat heater 450 is ensured.

  Further, the connecting portion 475 between the heating wire 463a of the linear heater 460 and the terminal 471 of the lead wire 470 has a double insulation structure of the heat-resistant sheet 480 and silicone resin. In this case, the heat of the connecting portion 475 is conducted to the metal foils 451 and 453 of the toilet seat heater 450 through the heat-resistant sheet 480 and the silicone resin. Thereby, local overheating and disconnection of the heating wire 463a are prevented while ensuring sufficient insulation.

  Furthermore, since the heating wire 463a of the linear heater 460 and the terminal 471 of the lead wire 470 are connected by thermal caulking, a thin and reliable electrical connection is realized. Further, since the heating wire 463a is prevented from floating, local overheating and disconnection of the heating wire 463a are prevented.

  In order to ensure the safety of the toilet seat 400, the toilet seat device 110 includes two safety circuits. One safety circuit is connected between one lead wire 470 of the toilet seat heater 450 and the toilet seat heater breakdown detection circuit inside the printed circuit board 230, and the other safety circuit is connected to both lead wires of the toilet seat heater 450. It is connected between 470 and the toilet seat heater disconnection detection circuit. Both safety circuits are used to prevent electric shock of the user when an abnormality occurs in the toilet seat heater 402.

  The toilet seat heater dielectric breakdown detection circuit detects that a current flows between the toilet seat heater 450 and the metal foil 451 when the insulating coating layer 462 is melted when the toilet seat heater 450 abnormally generates heat. The toilet seat heater disconnection detection circuit detects that the voltage waveform generated at both ends of the toilet seat heater 450 is not generated when the toilet seat heater 450 is disconnected. The heater driving unit 402 energizes the toilet seat heater 450 only when both of the two safety circuits detect a normal state.

(8-1) Operation of Toilet Seat Heater 450 Next, the operation of the toilet seat heater 450 will be described. When a constant voltage is applied between the heater start end portion 460a and the heater end portion 460b of the toilet seat heater 450, a current flows through the internal heating line 463a, and the heating line 463a generates heat. At this time, the generated heat is conducted from the heating wire 463a to the seating surface 410U of the upper toilet seat casing 410 through the enamel layer 463b and the metal foils 451 and 453.

  In the linear heater 460, since the insulating coating layer 462 is formed of PFA having a heat resistance of about 260 ° C., even if the thickness of the insulating coating layer 462 is as thin as 0.1 to 0.15 mm, for example, the heating wire 463a It is possible to prevent the enamel layer 463b from being destroyed even at a rapid temperature rise to 100 to 150 ° C. Therefore, the temperature of the seating surface 410U can be raised rapidly by rapidly advancing the heat conduction from the linear heater 460 to the seating surface 410U.

  In this case, it takes a short time of 5 to 6 seconds from the start of energization to the linear heater 460, for example, until the user enters the toilet room and sits on the seating surface 410U. It takes less than 7-8 seconds. Therefore, even if the energization detection sensor 600 detects that the user has entered the toilet room and at the same time the energization of the linear heater 460 is started, the seating surface 410U has a sufficiently optimum temperature until the user is seated. Can be reached.

  Further, the inner region G3 and the outer region G1 of the seating surface 410U in FIG. 74 have higher heat dissipation than the central region G2. In the present embodiment, the linear heaters 460 are arranged more densely in the inner region G3 and the outer region G1 than in the central region G2. Therefore, the temperature unevenness and the cold feeling are not felt at the moment when the user is seated on the seating surface 410U.

  On the other hand, the linear heater 460 is as long as about 10 m in total length, and rapidly expands as the heating wire 463a rapidly rises. As a result, the linear heater 460 expands in the length direction. In addition, when the energization is stopped, the temperature of the heating wire 463a is decreased and returns to the original length due to contraction. That is, thermal stress strain due to thermal expansion and contraction is repeatedly formed on the heating wire 463a.

  When the adhesion between the linear heater 460 and the metal foils 451 and 453 is weak, or when a gap is formed between the linear heater 460 and the seating surface 410U, the entire thermal stress strain is at the most easily moved portion of them. concentrate. As a result, a relatively strong bending / extending motion occurs in the linear heater 460, and damage to the linear heater 460 such as breakage of the heating wire 463a occurs due to accumulation of stress fatigue.

  In this example, since a plurality of bent portions are formed as thermal stress buffering portions in the linear heater 460, these bent portions finely disperse the entire thermal stress strain, and the bent portion exhibits thermal stress strain. Also acts to absorb. Therefore, the thermal stress at the bent portion is extremely small, and as a result, only slight bending and stretching occur. As a result, the heating wire 463a is not broken, and the life and durability of the linear heater 460 are improved.

  In addition, in the inner region G3 and the outer region G1 of the seating surface 410U with relatively large heat dissipation, the interval between the linear heaters 460 may be increased and the number of bent portions may be reduced as compared with the central region G2. .

  As described above, the overall length of the linear heater 460 is as long as approximately 10 m, and a bent portion is formed in the linear heater 460. Therefore, it is necessary to maintain and fix the arrangement of the linear heaters 460 when the linear heaters 460 are mounted on the seating surface 410U. A unitized toilet seat heater 450 is configured by closely attaching the linear heater 460 to the metal foils 451 and 453 in a state where the linear heater 460 is sandwiched between the metal foils 451 and 453. Therefore, the linear heater 460 can be bonded to the seating surface 410U in a state where the arrangement of the linear heaters 460 is firmly maintained.

  Further, since the linear heater 460 is sandwiched between the metal foils 451 and 453, the metal foils 451 and 453 perform heat distribution evenly. Thereby, it can prevent that the linear heater 460 heats up. In addition, the seating surface 410U is soaked and the toilet seat heater 450 is prevented from being damaged.

(8-m) Energization Sequence of Toilet Seat Device 110 The driving control of the toilet seat heater 450 is performed by changing the power for driving the toilet seat heater 450 to three.

  For example, when the temperature of the toilet seat 400 is raised with a first temperature gradient, the heater drive unit 402 in FIG. 70 drives the toilet seat heater 450 with about 1200 W of power (1200 W drive).

  As described above, the resistance value of the toilet seat heater 450 is 0.833 Ω / m, and the total length is 10 m. Therefore, the resistance value of the toilet seat heater 450 is 8.33Ω. When AC 100 V is applied to the toilet seat heater 450 having this resistance value, power of (100 V × 100 V) ÷ 8.33Ω = 1200 W is generated. That is, 1200 W of electric power is generated by passing a current through the toilet seat heater 450 over the entire period of the AC power supply.

  When the temperature of the toilet seat 400 is raised at a second temperature gradient that is slightly gentler than the first temperature gradient, the heater driving unit 402 drives the toilet seat heater 450 with about 600 W of power (600 W drive). Further, when the temperature of the toilet seat 400 is kept constant, the heater driving unit 402 drives the toilet seat heater 450 with about 50 W of power (low power driving). Note that low power driving refers to driving the toilet seat heater 450 with sufficiently low power (for example, power in the range of 0 W to 50 W) compared to 1200 W driving and 600 W driving.

  Switching between 1200 W driving, 600 W driving, and low power driving is performed by the energization rate switching circuit of the control unit 90 controlling energization from the heater driving unit 402 to the toilet seat heater 450.

  An AC current is supplied to the heater driving unit 402 from a power supply circuit (not shown). Therefore, the heater drive unit 402 causes the alternating current supplied based on the energization control signal provided from the energization rate switching circuit to flow through the toilet seat heater 450.

  FIG. 86 is a diagram showing a driving example of the toilet seat heater 450 and a change in the surface temperature of the toilet seat 400.

  In FIG. 86, a graph showing the relationship between the surface temperature of the toilet seat 400 and the time and a graph showing the relationship between the energization rate and the time when the toilet seat heater 450 is driven are shown. The horizontal axis of these two graphs is a common time axis.

  In this example, it is assumed that the user turns on the heating function in advance and sets the toilet seat set temperature high (38 ° C.).

  When the room temperature is lower than the standby temperature of 18 ° C. such as in winter, the control unit 90 (FIG. 70) adjusts the temperature of the toilet seat 400 so that the temperature becomes 18 ° C. As described above, the controller 90 controls the toilet seat heater 450 so that the surface temperature of the toilet seat 400 is constant at 18 ° C. during the waiting period D1 until the user's entrance is detected by the entrance detection sensor 600. Perform low power drive.

  When the entry detection sensor 600 detects entry of the user at time t1, the control unit 90 performs 600 W driving during the inrush current reduction period D2. This 600 W drive is performed in order to sufficiently reduce the inrush current. In this case, the surface temperature of the toilet seat 400 is raised with a slightly gentle second temperature gradient.

  Thereafter, the control unit 90 starts 1200W driving of the toilet seat heater 450 at time t2 after the rush current reduction period D2 has elapsed, and continues 1200W driving of the toilet seat heater 450 during the first temperature rising period D3. In this case, the surface temperature of the toilet seat 400 is increased with the first temperature gradient described above.

  Here, the surface temperature of the toilet seat 400 is rapidly increased. The toilet seat heater 450 is driven at 1200 W until the surface temperature of the toilet seat 400 reaches a predetermined temperature (for example, 30 ° C.). Of course, the predetermined temperature may be a temperature set as the heating temperature. However, the predetermined temperature is not a temperature sufficiently increased to the heating temperature, and even when the predetermined temperature is lower than the predetermined temperature, when the user is seated. It may be the lowest limit temperature (limit temperature) that does not cause an unpleasant feeling of being cold. This limit temperature has been found to be about 29 ° C. by subject experiments conducted by the inventors.

  Thus, in the first temperature increase period D3, the surface temperature of the toilet seat 400 is rapidly increased to a predetermined temperature by 1200 W driving. Thus, the user can sit on the toilet seat 400 without feeling that the toilet seat 400 is cold.

  In addition, as described above, when the surface temperature of the toilet seat 400 is rapidly increased, an overshoot occurs in the temperature change. However, in this example, when the surface temperature of the toilet seat 400 reaches a predetermined temperature, the 1200 W drive of the toilet seat heater 450 is switched to the 600 W drive. Therefore, even when the change in the surface temperature of the toilet seat 400 overshoots, the surface temperature does not exceed the toilet seat set temperature. As a result, the user is prevented from feeling the toilet seat 400 hot when seated.

  Subsequently, the control unit 90 starts 600W driving of the toilet seat heater 450 at time t3 after the elapse of the first temperature rising period D3, and continues 600 W driving of the toilet seat heater 450 during the second temperature rising period D4. To do. In this case, the surface temperature of the toilet seat 400 is raised with the second temperature gradient described above.

  The 600 W drive of the toilet seat heater 450 is performed until the surface temperature of the toilet seat 400 reaches the toilet seat set temperature (38 ° C.).

  The second temperature gradient is gentler than the first temperature gradient. This prevents a large overshoot from occurring in the change in the surface temperature of the toilet seat 400.

  The controller 90 starts low-power driving of the toilet seat heater 450 at time t4 after the elapse of the second temperature rising period D4, and continues low-power driving of the toilet seat heater 450 during the first maintenance period D5. Thereby, the surface temperature of the toilet seat 400 is constant at the toilet seat set temperature.

  When the seating sensor 290 detects that the user is seated on the toilet seat 400 at time t5, the controller 90 reduces the energization rate of the low-power drive, and the surface of the toilet seat 400 during the first seating period D6. The low-power drive of the toilet seat heater 450 is continued so that the temperature maintains the toilet seat set temperature. In this example, the first seating period D6 is set to about 10 minutes.

  In addition, the control unit 90 further reduces the energization rate of the low power drive at time t6 after the first seating period D6 has elapsed, and the surface temperature of the toilet seat 400 during the second seating period D7 is the toilet seat set temperature. The low-power drive of the toilet seat heater 450 is continued so that the temperature is lowered to a slightly lower temperature (36 ° C.). In this example, the second seating period D7 is set to about 2 minutes.

  At time t7 after the elapse of the second seating period D7, the control unit 90 further decreases the energization rate of the low power drive, and the surface temperature of the toilet seat 400 is lower than the toilet seat set temperature during the second maintenance period D8. The low-power drive of the toilet seat heater 450 is continued so as to be constant at a slightly low temperature (36 ° C.). In the following description, the surface temperature of the toilet seat 400 that is maintained constant in the second maintenance period D8, that is, a temperature slightly lower than the toilet seat set temperature is referred to as a maintenance temperature.

  Thus, in this example, after the user is seated on the toilet seat 400, the controller 90 gradually reduces the surface temperature of the toilet seat 400. This prevents the user from getting burned at low temperatures.

  When it is detected by the seating sensor 290 that the user has left the toilet seat 400 at time t8, the controller 90 stops driving the toilet seat heater 450 during the stop period D9. Thereby, the surface temperature of the toilet seat 400 decreases.

  The controller 90 starts the low-power driving of the toilet seat heater 450 again at time t9 when the surface temperature of the toilet seat 400 reaches 18 ° C., and waits for the surface temperature of the toilet seat 400 to be constant at 18 ° C. The low power driving of the toilet seat heater 450 is maintained during D10.

  Thus, when the temperature gradient becomes gradually gentle, the overshoot caused by the temperature change of the toilet seat 400 can be sufficiently reduced.

  In this example, after the user sits on the toilet seat 400, the surface temperature of the toilet seat 400 is gradually decreased by adjusting the power used to drive the toilet seat heater 450. The user may stop when sitting on the toilet seat 400. Even in this case, it is possible to prevent the user from getting burned at a low temperature.

  As described above, in this example, it has been described that the driving of the toilet seat heater 450 is stopped when it is detected that the user has left the toilet seat 400 at time t8, but the driving of the toilet seat heater 450 is stopped. May be performed after a lapse of a certain time (for example, 1 minute) from time t8 when it is detected that the user has left the toilet seat 400. In this case, the surface temperature of the toilet seat 400 does not decrease even when the user once again leaves the toilet seat 400 and again feels comfortable and sits on the toilet seat 400 again. As a result, the user can comfortably sit on the toilet seat 400.

  The energization state of the toilet seat heater 450 during 1200 W drive, 600 W drive, and low power drive will be described together with the energization control signal of the energization rate switching circuit.

  In the following description, the energization rate refers to the ratio of the time during which an alternating current is passed through the toilet seat heater 450 for one cycle of the alternating current.

  FIG. 87A is a waveform diagram of a current flowing through the toilet seat heater 450 during 1200 W drive, and FIG. 87B is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater drive unit 402 during 1200 W drive.

  As shown in FIG. 87 (b), the energization control signal at the time of 1200 W driving is always logic “1”. When the energization control signal is logic “1”, the heater driving unit 402 passes an alternating current supplied from the power supply circuit to the toilet seat heater 450 (FIG. 87 (a), a thick line portion). Thereby, an alternating current flows through the toilet seat heater 450 over the entire period. As a result, the toilet seat heater 450 is driven with about 1200 W of power.

  FIG. 88A is a waveform diagram of a current flowing through the toilet seat heater 450 during 600 W drive, and FIG. 88B is a waveform diagram of an energization control signal supplied from the energization rate switching circuit to the heater drive unit 402 during 600 W drive.

  As shown in FIG. 88 (b), the energization control signal at the time of 600 W driving consists of pulses having the same cycle as the alternating current supplied to the heater driving unit 402. The duty ratio of the pulse is set to 50%.

  When the energization control signal is logic “1”, the heater drive unit 402 causes an alternating current supplied from the power supply circuit to flow through the toilet seat heater 450 (FIG. 88 (a), thick line portion). Thereby, an alternating current flows through the toilet seat heater 450 during a half cycle. As a result, the toilet seat heater 450 is driven with about 600 W of electric power.

  FIG. 89A is a waveform diagram of a current flowing through the toilet seat heater 450 during low power driving, and FIG. 89B is a waveform diagram of an energization control signal provided from the energization rate switching circuit to the heater driving unit 402 during low power driving. .

  As shown in FIG. 89 (b), the energization control signal at the time of low power driving is composed of pulses having the same cycle as the alternating current supplied to the heater driving unit 402. The duty ratio of the pulse is set to be smaller than 50% (for example, about several percent).

  When the energization control signal is logic “1”, the heater drive unit 402 causes an alternating current supplied from the power supply circuit to flow through the toilet seat heater 450 (FIG. 89 (a), thick line portion). In each cycle, an alternating current flows through the toilet seat heater 450 for a period corresponding to the pulse width. As a result, the toilet seat heater 450 is driven with electric power of about 50 W, for example.

  In addition to the above, when the temperature of the toilet seat 400 is lowered, or when the heating function of the toilet seat device 110 is turned off, the energization rate switching circuit does not give an energization control signal to the heater drive unit 402 (energization control). Set the signal to logic "0"). Thereby, the heater driving unit 402 does not drive the toilet seat heater 450.

  Here, generally, when the current supplied to the electronic device has a harmonic component, noise is generated. In this example, when 1200 W drive or 600 W drive of the toilet seat heater 450 is performed as described above, the current supplied to the toilet seat heater 450 changes so as to draw a sine curve. However, the generation of noise is sufficiently reduced.

  Further, when the toilet seat heater 450 is driven at low power, the current supplied to the toilet seat heater 450 has a harmonic component, but the magnitude of the current is much smaller than that at the time of 1200 W driving and 600 W driving, so Occurrence is sufficiently reduced.

  As described above, in the present embodiment, toilet seat heater 450 is driven by electric power of 1200 W, 600 W, and about 50 W, but toilet seat heater 450 may be driven by other electric power.

  For example, when an alternating current is passed through the toilet seat heater 450 for a period of half a cycle, the timing for flowing the alternating current is set at intervals of a predetermined cycle such as two cycles or three cycles. As a result, the toilet seat heater 450 can be driven with power of a magnitude different from 1200 W, 600 W, and about 50 W while sufficiently preventing the generation of noise.

  In this example, the control unit 90 supplies current to the toilet seat heater 450 when the energization control signal is logic “1”, and supplies current to the toilet seat heater 450 when the energization control signal is logic “0”. Although it is stopped, the supply of current to the toilet seat heater 450 is stopped when the energization control signal is logic “1”, and the current is supplied to the toilet seat heater 450 when the energization control signal is logic “0”. Good.

  In addition, since the on / off of the toilet seat heater 450 is controlled by time, the temperature of the toilet seat 400 does not exceed the predetermined value or does not reach the predetermined value when the time measurement is shifted. Therefore, the control unit 90 measures the time during which the toilet seat 400 is turned on using two measurement sources so that the time measurement does not deviate. As one measurement source, the on-time of the toilet seat heater 450 is measured by an oscillator that defines the effective speed of the program of the control unit 90, and another measurement source is used as the measurement source of the toilet seat heater 450 based on the cycle of the AC voltage. Measure the on time. When at least one of these measured values exceeds the specified time, the process proceeds to the next energization pattern.

  In particular, excessive temperature rise is reliably prevented by accurately measuring the time during which 1200 W is energized in the toilet seat. This further improves the safety of the device. Although a method for improving the measurement accuracy by providing a plurality of measurement sources has been described here, it is a method for measuring the time during which the toilet seat heater 450 is fully energized and forcibly interrupting or restricting the energization of the heater. However, the same effect can be obtained.

(8-n) Effects on Toilet Seat Device 110 In the toilet seat device 110 of this example, heat generated by the heating wire 463a of the linear heater 460 is transmitted to the upper toilet seat casing 410 through the enamel layer 463b and the insulating coating layer 462. Is done. Thereby, the temperature of the seating surface 410U rises.

  Here, the enamel layer 463b has sufficient electrical insulation. Therefore, even if the thickness of the enamel layer 463b is reduced, the heating wire 463a and the upper toilet seat casing 410 can be sufficiently insulated. Thereby, the thickness of the insulating coating layer 462 can also be reduced.

  Therefore, in the toilet seat device 110, the thickness of the enamel layer 463b and the insulating coating layer 462 can be reduced while reliably insulating the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410. In this case, the heat capacities of the enamel layer 463b and the insulating coating layer 462 can be reduced, so that the heat generated by the heating wire 463a can be efficiently transmitted to the seating surface 410U.

  In the toilet seat device 110, an aluminum plate 413 is used for the upper toilet seat casing 410. Therefore, the heat generated by the heating wire 463a can be transmitted to the seating surface 410U more efficiently.

  As a result, it is possible to quickly raise the temperature of the seating surface 410U while reliably insulating the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410.

  Moreover, since the heat of the heating wire 463a can be efficiently transmitted to the seating surface 410U, the amount of heat generated by the heating wire 463a can be suppressed. Thereby, durability of the enamel layer 463b and the insulating coating layer 462 is improved. As a result, the reliability of the toilet seat device 110 is improved.

  Moreover, since the thickness of the enamel layer 463b and the insulating coating layer 462 for insulating the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410 can be reduced, the weight of the toilet seat device 110 can be reduced.

  In addition, since the heating wire 463a is covered with the enamel layer 463b having sufficient heat resistance, a material having low heat resistance can be used for the insulating coating layer 462. Thereby, the product cost of the toilet seat apparatus 110 can be reduced reliably.

  Further, when the enamel layer 463b is formed of polyester imide or polyamide imide, the polyester imide and polyamide imide are excellent in electrical insulation and heat resistance. Therefore, the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410 are more connected. It is possible to quickly raise the temperature of the seating surface 410U while ensuring insulation.

  Furthermore, when the sum of the thickness of the enamel layer 463b and the thickness of the insulating coating layer 462 is 0.4 mm or less, the seating surface 410U is reliably insulated from the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410. The temperature can be raised more quickly.

  In particular, when the sum of the thickness of the enamel layer 463b and the thickness of the insulating coating layer 462 is 0.2 mm or less, the temperature of the seating surface 410U can be raised more rapidly.

  Further, since the insulating coating layer 462 is made of a material having lower heat resistance than the enamel layer 463b, the product cost of the toilet seat device 110 can be sufficiently reduced.

  Further, since the linear heater 460 is provided so as to be sandwiched between the metal foil 451 and the metal foil 453 provided on the back surface side of the upper toilet seat casing 410, the heat generated by the heating wire 463a is the metal foils 451 and 453. Is transmitted efficiently. One surface of the metal foil 451 is attached to the back surface of the upper toilet seat casing 410 and one surface of the metal foil 453 is attached to the other surface of the metal foil 451. Thereby, the heat transmitted from the heating wire 463a to the metal foils 451 and 453 can be efficiently transmitted to the entire back surface of the upper toilet seat casing 410. Thereby, the entire seating surface 410U can be heated uniformly.

  In particular, when the metal foils 451 and 453 are made of aluminum, the heat generated by the heating wire 463a can be quickly transmitted by the upper toilet seat casing 410.

  Further, when the heat-resistant insulating layer 455 is provided between the back surface of the upper toilet seat casing 410 and the metal foil 451, the heat-resistant insulating layer 455 can more reliably insulate the heating wire 463a and the aluminum plate 413 of the upper toilet seat casing 410. Can do.

  Further, since the connecting portion 475 between the lead wire 470 and the linear heater 460 is provided between the metal foil 451 and the metal foil 453, the heat generation at the connecting portion 475 between the lead wire 470 and the linear heater 460 is generated by the metal foil 451. , 453. Thereby, the temperature of the seating surface 410U can be raised more rapidly.

  Moreover, since the connection part 475 is coat | covered with the heat-resistant sheet | seat 480, the connection part 475 and the upper toilet seat casing 410 can be insulated reliably.

  Furthermore, since the connection part 475 is coat | covered with a silicone resin, the connection part 475 can be reliably waterproofed.

  Since the high tensile strength heater wire made of an Ag—Cu alloy is used as the heating wire 463a of the linear heater 460, the diameter of the heating wire 463a can be reduced while ensuring the strength of the heating wire 463a. Accordingly, the long heating wires 463a can be arranged at a high density in a narrow space. As a result, the temperature increase rate of the seating surface 410U can be improved.

<9> Operation Sequence of Each Part of Sanitary Washing Apparatus 100 FIG. 90 is a timing chart showing an operation sequence of each part of the sanitary washing apparatus 100.

  Here, the switching valve 13 for human bodies in FIG. 3 switches the supply path of the washing water when the switching valve motor 13m rotates.

  Here, the rotational position of the switching valve motor 13 mm for ejecting the cleaning water from the buttocks nozzle 21 is referred to as a butting cleaning position, and the rotational position of the switching valve motor 13 m for ejecting the cleaning water from the bidet nozzle 22 is referred to as a bidet cleaning position. Call. Further, the rotation position of the switching valve motor 13m for ejecting the cleaning water from the nozzle cleaning nozzle 23 before the human body cleaning is called a pre-cleaning position, and the switching valve motor for ejecting the cleaning water from the nozzle cleaning nozzle 23 after the human body cleaning. The rotational position of 13 m is referred to as a post-cleaning position, and the rotational position of the switching valve motor 13 m for preliminarily heating the cleaning water while discharging the cleaning water from the nozzle cleaning nozzle 23 is referred to as a preheat position. Furthermore, the rotational position of the switching valve motor 13m that does not supply cleaning water to the buttocks nozzle 21, bidet nozzle 22, and nozzle cleaning nozzle 23 is referred to as a stop (standby) position. In this example, the pre-cleaning position, the post-cleaning position, and the preheat position are the same.

  When the user sits on the toilet seat 400 at time t11, the controller 90 rotates the switching valve motor 13m to the preheat position, opens the water stop solenoid valve 7, and operates the pump 11 with a weak driving force. Accordingly, the cleaning water is discharged from the nozzle cleaning nozzle 23 through the heat exchanger 9, the pump 11, and the human body switching valve 13.

  When there is a possibility that water has not been passed through the water circuit as in the first energization of the main body 200, the time until the water circuit becomes full between time t11 and time t12 ( For about 3 seconds), the heat exchanger 9 is not energized.

  A period from time t12 to time t13 is provided to prevent the heat exchanger 9 from being blown. Thereafter, when the flow rate measured by the flow sensor 8 reaches a predetermined value at time t13, the control unit 90 turns on the heat exchanger 9. Thereby, the washing water is heated.

  When the temperature rise of the cleaning water is completed, at time t14, the control unit 90 rotates the switching valve motor 13m to the stop position, closes the water stop electromagnetic valve 7, and turns off the pump 11 and the heat exchanger 9.

  When the user depresses the buttocks switch 312 at time t15, the control unit 90 rotates the switching valve motor 13m to the pre-cleaning position, opens the water stop solenoid valve 7, and drives the pump 11 at a predetermined pre-cleaning time. Operate with. Thereby, the washing water is ejected from the nozzle washing nozzle 23 through the heat exchanger 9, the pump 11 and the human body switching valve 13. When the flow rate measured by the flow rate sensor 8 reaches a predetermined value at time t16, the control unit 90 turns on the heat exchanger 9. Thereby, the washing water is heated.

  At time t17, the control unit 90 rotates the switching valve motor 13m to the buttocks washing position, closes the water stop electromagnetic valve 7, and turns off the pump 11 and the heat exchanger 9.

  At time t18, the control unit 90 starts the protrusion of the buttocks nozzle 21 from the stop position by the nozzle drive motor 20m. When the buttocks nozzle 21 moves from the nozzle drive motor 20m to the standard position at time t19, the control unit 90 opens the water stop solenoid valve 7 and drives the pump 11 (set value) corresponding to the set cleaning strength. Operate with.

  When the flow rate measured by the flow rate sensor 8 reaches a predetermined value at time t20, the control unit 90 turns on the heat exchanger 9. Accordingly, the cleaning water is heated, and the heated cleaning water is ejected to the user's local area. The period from the time point t21 to the time point t22 is a period provided for eliminating the water pressure inside the nozzle portion 20 after the water stop solenoid valve 7 is closed. This period is set to about 0.5 seconds, for example.

  When the user depresses the stop switch 311 at time t21, the control unit 90 rotates the switching valve motor 13m toward the stop position, closes the water stop electromagnetic valve 7, and turns off the pump 11 and the heat exchanger 9. . Thereby, human body washing | cleaning is complete | finished.

  At time t22, the control unit 90 moves the butt nozzle 21 from the standard position toward the stop position by the nozzle drive motor 20m.

  When the switching valve motor 13m rotates to the stop position at time t23, the control unit 90 rotates the switching valve motor 13m to the post-cleaning position, opens the water stop solenoid valve 7, and operates the pump 11 with a weak driving force. Thereby, the washing water is ejected from the nozzle washing nozzle 23 through the heat exchanger 9, the pump 11 and the human body switching valve 13.

  When the flow rate measured by the flow rate sensor 8 reaches a predetermined value at time t24, the control unit 90 turns on the heat exchanger 9. Accordingly, the washing water is heated, and the butt nozzle 21 and the bidet nozzle 22 are washed with the heated washing water.

  At time t25, the control unit 90 rotates the switching valve motor 13m to the stop position, closes the water stop electromagnetic valve 7, and turns off the pump 11 and the heat exchanger 9.

<10> Operation Sequence when Using Toilet Device 1000 (10-a) When Entering Toilet Room When the user enters the toilet room, the user is detected by the entrance detection sensor 600. As a result, an entry detection signal is transmitted from the entry detection sensor 600 to the control unit 90 of the main body 200 by infrared rays.

  The room entry detection sensor 600 may continue to transmit the room entry detection signal to the control unit 90 of the main body unit 200 by infrared rays while detecting the user. However, in order to extend the battery life, the room entry detection sensor 600 may Once the entry detection signal is transmitted, it is not necessary to transmit the entry detection signal for a certain period of time.

  When receiving the entrance detection signal from the entrance detection sensor 600, the control unit 90 changes the lid 500 from the closed state to the open state by the toilet seat toilet lid opening / closing device.

  The controller 90 causes the heater driver 402 to raise the temperature of the toilet seat 400 according to the pattern shown in FIG. Moreover, the control part 90 performs the operation | movement which prevents that a stool adheres to a toilet bowl surface by discharging water to the toilet bowl surface called toilet bowl pre-washing with the toilet nozzle 40. FIG.

  Moreover, the control part 90 illuminates the washing | cleaning water sprayed radially in order to raise a visual effect with the boy's small target display LED (light emitting diode) at the time of toilet pre-washing.

  The entrance detection sensor 600 used here detects the user entering the toilet reliably and at an early timing, and starts to raise the temperature of the toilet seat 400. Therefore, for example, even when the user enters the room without turning on the main illumination of the toilet at night, the lid 500 of the sanitary washing device 100 opens at a very early timing.

  Then, at the moment when the room entry detection sensor 600 detects the human body, the boy's small target display LED is turned on. Thereby, the light leaking from the toilet bowl 700 together with the light inside the toilet bowl 700 gently illuminates the periphery of the toilet bowl 700. Thereby, the awakening of the sleeping user is suppressed. In addition, indirect lighting of the toilet with excellent safety is performed.

(10-b) For boys small use When the user operates a toilet seat opening / closing switch (not shown) of the remote control device 300, the control unit 90 changes the toilet seat 400 from the closed state to the open state by the toilet seat toilet lid opening / closing device. To do. In addition, the control unit 90 stops energizing the toilet seat heater 450 and turns off the toilet seat temperature adjustment lamp RA1. Thereby, energy saving property further improves. In addition, the boy's small target display LED is turned on. Here, the boy's small target display LED emits light to the boy's small target portion in the toilet 700.

  When the entrance detection signal is not received from the entrance detection sensor 600 for 5 minutes with the toilet seat 400 and the lid 500 open, the controller 90 opens the toilet seat 400 and the lid 500 with the toilet seat toilet lid opening / closing device. To the closed state.

(10-c) During Seating and Defecation The control unit 90 measures the elapsed time from when the user is seated on the toilet seat 400 based on the seating detection signal from the seating sensor 610. Then, the temperature of the toilet seat 400 is increased by the heater driving unit 402 in the pattern shown in FIG.

  When the user sits on the toilet seat 400, preheating shown in FIG. 90 is performed to warm the water circuit including the heat exchanger 9. As described above, when the washing water is not supplied to the heat exchanger 9, the control unit 90 turns off the heaters (for example, the sheathed heaters 91 and 92) disposed in the heat exchanger 9. Whether or not the washing water is supplied to the heat exchanger 9 is detected by the flow sensor 8. However, when the sheathed heaters 91 and 92 are turned on for the first time, water is not passed through the water circuit, and therefore the time until the water circuit becomes full (about 3 seconds) is determined by the flow sensor 8 at a predetermined flow rate. Even if detected, the sheathed heaters 91 and 92 are not energized.

  When the user is seated on the toilet seat 400, the controller 90 operates the deodorizing unit 220. While the user continues to sit on the toilet seat 400, the deodorizing unit 220 continues to operate for a maximum of 30 minutes. The air volume of the deodorizing unit 220 is switched to three stages. From the seating of the user to the start of cleaning, the air volume is set to “medium”, the air volume is set to “weak” during the cleaning, and the air volume is set to “strong” for 1 minute after the user leaves the seat.

(10-d) Human Body Washing When the user presses the back switch 312 or the bidet switch 313 of the remote control device 300, the control unit 90 performs the above pre-cleaning to warm the water circuit. Thereby, it is prevented that cold water is discharged to a user.

  When the temperature detected by the hot water temperature sensor 98 of the heat exchanger 9 continues the specified temperature (32 ° C.) for the specified time (3 seconds) or longer, the control unit 90 ends the pre-cleaning. After completion of the pre-cleaning, the control unit 90 causes the buttocks nozzle 21 or the bidet nozzle 22 to protrude by the nozzle drive motor 20m with the water stop solenoid valve 7 closed. Thereby, it is prevented that the washing water is applied to the user when the buttocks nozzle 21 or the bidet nozzle 22 protrudes.

  After the posterior nozzle 21 or the bidet nozzle 22 reaches the standard position, the control unit 90 controls the pump 11 to clean the human body with the water force (water amount) set by the user using the remote operation device 300. The maximum cleaning time is, for example, 5 minutes.

  When the user depresses the stop switch 311 of the remote control device 300, the control unit 90 closes the water stop electromagnetic valve 7 and stores the buttocks nozzle 21 or the bidet nozzle 22 in the nozzle unit 20 by the nozzle drive motor 20m.

  Thereafter, the control unit 90 performs post-cleaning by the nozzle cleaning nozzle 23 in order to clean the nozzle unit 20.

  During cleaning by the nozzle unit 20, the control unit 90 operates the deodorizing unit 220 in a weak state. Thereby, deodorization in the toilet room is performed.

(10-e) At the time of seating When the seating sensor 610 no longer detects the seating of the user, the control unit 90 moves the butt nozzle 21 and the bidet nozzle 22 back and forth by the nozzle drive motor 20m in order to enhance the visual effect. The nozzle unit 20 is cleaned by the nozzle cleaning nozzle 23. At this time, the controller 90 emphasizes the nozzle cleaning operation by turning on the boy's small target display LED.

  Moreover, the control part 90 operates the deodorizing unit 220 in a strong state for 1 minute after a user's leaving. Thereby, deodorization in a toilet room is performed strongly.

  Further, when the seating sensor 610 does not detect the seating of the user and the entrance detection sensor 600 does not detect the user for 3 minutes, the control unit 90 changes the lid 500 from the open state to the closed state by the toilet seat toilet lid opening / closing device. To do.

(10-f) When leaving the room When the entrance detection sensor 600 does not detect the user for a certain period of time, the controller 90 closes the toilet seat 400 and the lid 500 with the toilet seat toilet lid opening / closing device. Further, one minute after the entrance detection sensor 600 no longer detects the user, the control unit 90 cuts off the energization of the toilet seat heater 450 by the heater drive unit 402. Thereby, a series of operation sequences of the toilet apparatus 1000 is completed.

<11> Correspondence between Each Component in Claim and Each Element in Embodiment The following describes an example of correspondence between each component in the claim and each element in the embodiment. It is not limited to.

  In the said embodiment, the nozzle part 20 is an example of the ejection part for human bodies, the toilet nozzle 40 is an example of the ejection part for toilets, the piping 3 and the piping 10 are examples of a 1st flow path, and branch piping 30 and the branch pipe 32, the branch pipe 33, the pipe 35 or the pipe 36 are examples of the second flow path, the toilet nozzle cover 40K is an example of a shielding member, and the storage position is an example of the first state, The toilet cleaning position is an example of the second state, and the human switching valve 13 is an example of a switching valve.

  As each constituent element in the claims, various other elements having configurations or functions described in the claims can be used.

  INDUSTRIAL APPLICABILITY The present invention can be used for a sanitary washing device for washing a local part of a human body.

1 is an external perspective view showing a sanitary washing device according to an embodiment of the present invention and a toilet device including the same. Front view of the remote control device of FIG. Schematic diagram showing the configuration of the main unit Vertical section of sanitary washing device The expanded sectional view for demonstrating the toilet nozzle of FIG. 4 and its surrounding structure Longitudinal cross section of sanitary washing device during toilet pre-washing The expanded sectional view for demonstrating the toilet nozzle of the state of FIG. 6, and its surrounding structure Sectional drawing which shows the structure of the front-end | tip part of the toilet nozzle of FIG. The figure which shows the relationship between the jet flow velocity of the washing water jetted from the toilet nozzle of FIG. The figure which shows the investigation result of the entrance time The figure which shows the control flow of the toilet bowl washing process by a control part Sectional drawing which shows the other structural example of a toilet nozzle Sectional drawing which shows the other structural example of a toilet nozzle Sectional drawing which shows the other structural example of a toilet nozzle The figure for demonstrating the other method for increasing the quantity of the washing water spouted from the front side of a toilet nozzle Sectional drawing which shows the other structural example of a toilet nozzle Sectional drawing which shows the other structural example of a toilet nozzle Sectional drawing which shows the other structural example of a toilet nozzle The figure which shows the toilet nozzle and other structural examples around it The figure which shows the other example of a structure of a toilet nozzle and its periphery The figure which shows the other example of a structure of a toilet nozzle and its periphery The figure which shows the other example of a structure of a toilet nozzle and its periphery Schematic diagram showing another configuration example of the main body Cross-sectional view of the ion elution apparatus of FIG. Schematic diagram showing still another configuration example of the main body Schematic diagram showing still another configuration example of the main body Schematic diagram showing still another configuration example of the main body Schematic diagram showing still another configuration example of the main body FIG. 3 is an external perspective view of the heat exchanger of FIG. 3 viewed from one side. FIG. 3 is an external perspective view of the heat exchanger of FIG. 3 viewed from the other side. Plan view of the heat exchanger of FIG. 31A is a cross-sectional view taken along line A31-A31 in FIG. 31, FIG. 32B is a cross-sectional view taken along line B31-B31 in FIG. 31, and FIG. 32C is a cross-sectional view taken along line C31-C31 in FIG. (A) is a side view of the heat exchanger of FIG. 3, (b) is a sectional view taken along line C33-C33 of (a). The figure for demonstrating the structure of the sheathed heater of FIG. The figure for demonstrating the 1st drive method of the heat exchanger of FIG. The figure for demonstrating the 2nd drive method of the heat exchanger of FIG. The figure for demonstrating the 3rd drive method of the heat exchanger of FIG. The figure for demonstrating the 4th drive method of the heat exchanger of FIG. The figure for demonstrating the 5th drive method of the heat exchanger of FIG. The figure for demonstrating the 6th drive method of the heat exchanger of FIG. The figure for demonstrating the 7th drive method of the heat exchanger of FIG. The figure for demonstrating the 8th drive method of the heat exchanger of FIG. The figure for demonstrating the 9th drive method of the heat exchanger of FIG. Current waveform diagram energized during 900 W drive of heat exchanger by the first driving method The graph which shows the measurement result of the harmonic current to the 40th order generate | occur | produced at the time of 900W drive of the heat exchanger by a 1st drive method The figure which shows the 1st example of a high temperature water ejection prevention mechanism The figure which shows the 2nd example of a high temperature water ejection prevention mechanism The figure which shows the 3rd example of a high temperature water ejection prevention mechanism The figure which shows the 4th example of a high temperature water ejection prevention mechanism The figure which shows the 1st structural example of the sheathed heater for preventing the disconnection of the heating wire of FIG.34 (c). The figure which shows the 2nd structural example of the sheathed heater for preventing the disconnection of the heating wire of FIG.34 (c). The figure which shows the example of attachment to the heat exchanger of the triac which the electric power supply part of FIG. 29 has The figure which shows a heat exchanger provided with two kinds of sheathed heaters with different rated power The figure for demonstrating the other structural example of the flow path formed in a heat exchanger The figure for demonstrating the 1st structural example for implement | achieving size reduction of the main-body part of FIG. The figure for demonstrating the 2nd structural example for implement | achieving size reduction of the main-body part of FIG. The figure for demonstrating the 3rd structural example for implement | achieving size reduction of the main-body part of FIG. The figure for demonstrating the 4th structural example for implement | achieving size reduction of the main-body part of FIG. The figure for demonstrating the 1st control method for preventing the rapid temperature fluctuation of the washing water spouted to a user's local part. The figure for demonstrating the 2nd control method for preventing the rapid temperature fluctuation of the washing water spouted to a user's local part. The figure for demonstrating the 3rd control method for preventing the rapid temperature fluctuation of the washing water spouted to a user's local part. The figure which shows the other example of the heat exchanger of FIG. External perspective view of nozzle 1 is an external perspective view showing the internal structure of the main body of FIG. 1 is an external perspective view showing the internal structure of the main body of FIG. The figure which shows the main body upper casing of the main-body part of FIG. External perspective view of main body with attached toilet seat and lid External perspective view of main body with attached toilet seat and lid JJ longitudinal cross-sectional view of FIG. 67 (b) Schematic diagram showing the configuration of the toilet seat device Disassembled perspective view of toilet seat (A) is a top view of the toilet seat heater of the toilet seat part of a 1st example, (b) is an enlarged view of the area | region of (a). The top view of the toilet seat part of the 1st example C73-C73 sectional view of the toilet seat of FIG. (A) is a top view of the toilet seat heater of the toilet seat part of a 2nd example, (b) is an enlarged view of the area | region of (a). Plan view of toilet seat part of second example (A) is a top view of the toilet seat heater of the toilet seat part of a 3rd example, (b) is a partial expanded sectional view of (a). The top view of the toilet seat heater of the toilet seat part of the 4th example Sectional drawing which shows an example of the structure of the toilet seat heater attached to an upper toilet seat casing Sectional drawing which shows the other example of the structure of the toilet seat heater attached to an upper toilet seat casing Sectional drawing which shows the further another example of the structure of the toilet seat heater attached to an upper toilet seat casing The figure which shows the measurement result of the relationship between the coating thickness of a heating wire, and the temperature rise of each part of a toilet seat part Diagram showing connection method between linear heater and lead wire Sectional view of the connection between the linear heater and the lead wire Diagram showing heat caulking method The figure which shows the change of the surface temperature of the driving example of the toilet seat heater and the toilet seat (A) is a waveform diagram of the current flowing through the toilet seat heater during 1200 W drive, and (b) is a waveform diagram of an energization control signal applied from the energization rate switching circuit to the heater drive unit during 1200 W drive. (A) is a waveform diagram of the current flowing through the toilet seat heater during 600 W drive, and (b) is a waveform diagram of an energization control signal applied from the energization rate switching circuit to the heater drive unit during 600 W drive. (A) is a waveform diagram of the current flowing through the toilet seat heater during low power driving, and (b) is a waveform diagram of an energization control signal applied from the energization rate switching circuit to the heater driving unit during low power driving. Timing chart showing operation sequence of each part of sanitary washing device

Explanation of symbols

40 Toilet Nozzle 40K Toilet Nozzle Cover 40m Toilet Nozzle Motor 41 Toilet Nozzle Main Body 42 Jet Formation Member 90 Control Unit 100 Sanitary Washing Device 200 Main Body 1000 Toilet Device

Claims (5)

A sanitary washing device that supplies the human body with wash water supplied from a supply source,
An ejection part for the human body that ejects washing water onto the human body;
A toilet spout for spouting wash water into a toilet having a front portion and a rear portion;
A first flow path that is provided between the supply source and the human body ejection section and distributes wash water supplied from the supply source to the human body ejection section;
A second flow path that is connected to the first flow path and circulates the wash water in the first flow path to the toilet flushing section;
A heat exchanger provided in the first flow path for heating the wash water supplied from the supply source,
The toilet flushing portion is a toilet nozzle that jets flush water radially toward the inner surface of the toilet on the rear side of the toilet;
A sanitary washing device comprising: a shielding member provided at least in front of the toilet nozzle on the rear side of the toilet. The toilet nozzle and the shielding member have a first state in which splashing of washing water ejected from the toilet nozzle is prevented by the shielding member and a second state in which forward splashing is not inhibited by the shielding member. The sanitary washing apparatus according to claim 1, wherein the sanitary washing apparatus is provided so as to be selectively set to the state of The sanitary washing apparatus according to claim 1 or 2, wherein the second flow path is connected to the first flow path on the upstream side of the heat exchanger. The sanitary washing apparatus according to any one of claims 1 to 3, further comprising a water stop solenoid valve that switches a supply state of the wash water supplied from the supply source. The human body ejection section includes a plurality of nozzles and a switching valve that switches a supply state of cleaning water to the plurality of nozzles,
The sanitary washing apparatus according to any one of claims 1 to 4, wherein the switching valve is provided so as to be able to stop the supply of washing water from the supply source to the plurality of nozzles.

Images