JP6209739B2 - Sanitary washing device - Google Patents

Description

  The present invention relates to a tank water level detection structure in a sanitary washing device for washing a human body part.

  Conventionally, as a water level detection structure in the tank of this type of sanitary washing apparatus, two electrodes are suspended at a position close to the upper surface of the tank, and the two electrodes are submerged so that they are energized. It has a structure for detecting the water level (see, for example, Patent Document 1).

  FIG. 37 shows a conventional sanitary washing device described in Patent Document 1, and the water circuit of the sanitary washing device is composed of a water supply electromagnetic valve 1, a water pump 2, a hot water tank 3, and a nozzle 4. The hot water tank 3 is presumed to be a sealed tank, and two electrodes 5 are installed close to the upper surface 3a of the hot water tank 3 as a sensor for detecting the full water state of the hot water tank 3. These electrodes are connected to the water level detection circuit 6, respectively.

JP-A-9-12596

  However, in the conventional configuration, the water level is detected by conduction between the electrodes in the submerged state of the two electrodes. However, the water used as the cleaning water is conductive depending on the hardness, content, temperature, etc. of the water. Because the rate is different, there is a difference in the conduction state between the electrodes at the same water level, and there may be an error in the water level detection due to the conductivity of the washing water used, accuracy and reliability as a water level detection sensor, and use There was still room for improvement in terms of limiting the range of possible wash water.

  The present invention solves the above-mentioned conventional problems, improves the detection accuracy of the water level detection sensor, expands the range of usable water conductivity, improves usability, and provides a highly accurate water level detection function. With the timekeeping function, the flow rate of the wash water can be calculated by calculation, so that a highly functional sanitary washing device can be constructed with a simple water circuit and at low cost without the need for a separate flow rate sensor. The purpose is to provide in.

  In order to solve the above-described conventional problems, a sanitary washing device of the present invention includes a nozzle device that ejects washing water, a washing water supply channel that supplies washing water to the nozzle device, and a control unit. The supply channel includes a water pump that supplies cleaning water to the nozzle device, a heat exchanger that is upstream of the water pump and heats the cleaning water, and a cleaning water supply channel that is upstream of the heat exchanger. A sub tank that opens a part of the water to the atmosphere, and the sub tank includes a water level detection sensor that detects the water level of the cleaning water stored in the sub tank and an incoming water temperature sensor, and the water level detection sensor is disposed on the inner surface of the sub tank. And a plurality of water level electrodes, the control unit is configured to apply a direct current between the common electrode and the water level electrode and detect the water level by a change in voltage, and the control unit is in a flooded state and a non-flooded state of the water level electrode. With a threshold for determining It is characterized in that to correct the threshold by temperature detection data of the temperature sensor.

As a result, it is possible to improve the accuracy of water level detection, and it is possible to use wash water with conductivity in a wide range, and it is possible to provide a sanitary washing apparatus that has a wide use range and is easy to use.

  The sanitary washing device of the present invention can improve usability by improving the accuracy of water level detection and expanding the range of use of washing water.

The perspective view of the state which installed the sanitary washing apparatus in Embodiment 1 of this invention in the toilet bowl The perspective view of the state which removed the front main part case of the sanitary washing device The perspective view of the state which removed the front main part case and control part of the sanitary washing device The perspective view which shows the operation part upper surface of the sanitary washing apparatus Perspective view showing the external appearance of the remote controller Schematic diagram showing the configuration of the water circuit of the cleaning means of the sanitary cleaning device The perspective view which shows the decomposition | disassembly state of the water circuit of the sanitary washing apparatus The perspective view which shows the assembly state of the water circuit of the sanitary washing apparatus Perspective view showing the appearance of the sub tank Cross section of front view of sub tank Side view of sub tank Graph showing change in output voltage and threshold value between upper limit electrode and common electrode Graph showing output voltage change and threshold of lower limit electrode and common electrode A perspective view showing the appearance of the heat exchanger Cross section of heat exchanger Perspective view showing appearance of water pump Cross section of water pump The perspective view which shows the external appearance of the accommodation state of a nozzle apparatus AA sectional view shown in FIG. Longitudinal sectional view of the nozzle device in the stowed state Detailed sectional view of part B shown in FIG. CC cross section shown in FIG. Cross-sectional view of the storage state of the nozzle device Detailed sectional view of part D shown in FIG. Longitudinal section showing the butt cleaning state of the nozzle device Detailed sectional view of part E shown in FIG. A longitudinal sectional view showing the bidet cleaning state of the nozzle device Detailed sectional view of F section shown in FIG. Cross-sectional view showing the bidet cleaning state of the nozzle device Detailed sectional view of part G shown in FIG. Time chart of cleaning means during initial use of the sanitary cleaning device Time chart of cleaning means during normal use of the sanitary cleaning device The perspective view which shows the external appearance of the sub tank in Embodiment 2. Sectional drawing of the front view of the sub tank in Embodiment 2 Sectional drawing of the side view of the sub tank in Embodiment 2 Schematic diagram of the top surface of the sub-tank in the second embodiment when the tank is full Schematic diagram showing the configuration of the water circuit of a conventional sanitary washing device

A first invention includes a nozzle device that ejects cleaning water, a cleaning water supply channel that supplies cleaning water to the nozzle device, and a control unit, and the cleaning water supply channel is provided in the nozzle device. A water pump for supplying cleaning water, a heat exchanger upstream of the water pump for heating the cleaning water, and a part of the cleaning water supply channel upstream of the heat exchanger. A sub-tank that is open to the sub-tank, and the sub-tank includes a water level detection sensor that detects a water level of the cleaning water stored in the sub-tank and a water temperature sensor, and the water level detection sensor is common to the inner surface of the sub tank. An electrode and a plurality of water level electrodes, the control unit is configured to apply a direct current between the common electrode and the water level electrode to detect the water level by a change in voltage, the control unit of the water level electrode Inundation and non-inundation Comprising a threshold value for determining a sanitary washing device and corrects the threshold by the temperature detection data of the entering water temperature sensor.

  As a result, it is possible to improve the accuracy of water level detection, and it is possible to use wash water with conductivity in a wide range, and it is possible to provide a sanitary washing apparatus that has a wide use range and is easy to use.

  In a second aspect of the invention, particularly in the first aspect of the invention, the control unit calculates the flow rate supplied by the water pump based on the detection data of the water level sensor and the capacity of the sub-tank. When the flow rate is different from the set value, the output of the water pump is adjusted.

  Thereby, in the configuration of the water circuit, it is not necessary to separately provide a dedicated flow sensor for detecting the flow rate, and the configuration of the water circuit can be simplified and the cost can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 shows a perspective view of the appearance of the sanitary washing device according to the present embodiment installed on a toilet, FIG. 2 shows a perspective view of the sanitary washing device with the front body case removed, and FIG. Shows a perspective view of the sanitary washing device with the front main body case and the control unit removed, FIG. 4 shows a perspective view of the upper surface of the operation unit of the sanitary washing device, and FIG. 5 shows a perspective view of the external appearance of the remote controller. It is shown.

<1> Overall Configuration of Sanitary Washing Device As shown in FIG. 1, the sanitary washing device 100 includes a main body 200, a toilet seat 300, a toilet lid 320, a remote controller 400, and a human body detection sensor 450 as main components. The toilet seat 300 and the toilet lid 320 are integrally formed and installed on the upper surface of the toilet 110.

  In the present embodiment, the configuration side of the main body 200 of the sanitary washing apparatus 100 is the rear side, the installation side of the toilet seat 300 is the front side, the right side is the front side, the right side is the front side, and the left side is the front side. Explain the arrangement of elements.

  An operation unit 210 is integrally provided so as to protrude from a side portion of the main body 200, and a toilet seat 300 and a toilet lid 320 are attached to a front portion of the main body 200 through a toilet seat toilet lid rotation mechanism 360 so as to be freely opened and closed. . The toilet seat toilet lid rotation mechanism 360 includes a DC motor and a plurality of gears, and can open and close the toilet seat 300 and the toilet lid 320 individually or simultaneously.

  In the state where the toilet lid 320 is opened as shown in FIG. 1, the toilet lid 320 stands up so as to be positioned at the rearmost part of the sanitary washing device 100. When the toilet lid 320 is closed, the upper surface of the toilet seat 300 is concealed. The toilet lid 320 is composed of a member made by molding a resin material, and has a double structure and a heat insulating structure using a heat insulating material.

  The toilet seat 300 has a built-in toilet seat heater (not shown) for heating the seating surface, and heats the seating surface of the toilet seat to a comfortable temperature.

  A seating sensor (not shown) for detecting a human body seated on the toilet seat 300 is installed at a bearing portion in the main body 200 that supports the rotation shaft of the toilet seat 300. This seating sensor is a weight-type seating sensor, and detects that the user is seated on the seating surface of the toilet seat 300 by opening and closing the switch by a weight change caused by the seating of the user on the toilet seat 300. It is.

The main body 200 includes a sub-tank 600, a heat exchanger 700, a nozzle device 800, and the like. The cleaning unit 500 cleans a local part of the human body, the deodorizing device 120 that deodorizes odor during defecation, and the sanitary washing device 100. A control unit 130 for controlling each function is incorporated. (Details of the cleaning means 500 will be described later.)
As shown in FIG. 2, a nozzle device 800, which is a main component of the cleaning unit 500, is installed at the center inside the main body 200, and a deodorizing device 120 is installed on the left side of the nozzle device 800. Yes. On the left side, a toilet seat toilet lid rotation mechanism 360 that opens and closes the toilet seat 300 and the toilet lid 320 is installed.

  As shown in FIG. 3, on the right side of the nozzle device 800, a water stop electromagnetic valve 514 of the cleaning means 500, a sub tank 600, and the like are installed in the front, and a heat exchanger 700 is installed in the rear thereof. A water pump 516 is installed behind the heat exchanger 700. Further, as shown in FIG. 2, a control unit 130 is installed above the cleaning unit 500.

  An operation unit 210 is integrally provided on the right side of the main body 200 so as to protrude forward. As shown in FIG. 4, a plurality of switches and indicator lamps 240 for operating and setting each function of the sanitary washing device 100. Is installed.

  An operation board (not shown) is installed inside the operation unit 210. A plurality of tact switches and a plurality of LEDs are installed on the operation board, and the tact switch can be pressed and the LEDs can be visually recognized via a switch nameplate attached to the upper surface of the operation unit 210.

  In addition, an infrared receiving unit 211 that receives infrared signals transmitted from the remote controller 400 and the human body detection sensor 450 is disposed behind the upper surface of the operation unit 210.

  The switches installed in the operation unit 210 are provided with a plurality of operation switches 220 for operating the cleaning operation and a plurality of setting switches 230 for setting various functions. Further, as the indicator lamp 240, a plurality of LEDs for displaying the setting state are installed.

  As the operation switch 220, there are provided a buttocks cleaning switch 221 that is used as an auxiliary when the battery of the remote controller 400 is dead or broken, and a nozzle cleaning switch 222 that is operated when cleaning the nozzle.

  The setting switch 230 includes a hot water temperature switch 231 that sets the temperature of the washing water, a toilet seat temperature switch 232 that sets the temperature of the toilet seat, and an 8-hour switch that stops the temperature of the toilet seat 300 for eight hours after the setting. 233, a power saving switch 234 that automatically learns a time zone when the sanitary washing device 100 is not used, and lowers the temperature of the toilet seat 300 during a time period when it is not used, and an automatic operation of the toilet seat 300 and the toilet lid 320 A toilet lid automatic opening / closing switch 235 and the like for setting an opening / closing operation are provided.

Many operations of the sanitary washing apparatus 100 are performed by a remote controller 400 configured separately from the main body 200. The remote controller 400 is attached to a wall surface of a toilet room that is easy for a user who is seated on the toilet seat 300 to operate.

  As shown in FIG. 5, the entire shape of the remote controller 400 is formed in a thin rectangular parallelepiped, and a plurality of switches and indicator lamps are installed on the upper surface and the front surface of a box-shaped remote control body 401 molded from a resin material. . In addition, the remote controller main body 401 is provided with a transmission unit 402 that transmits an operation signal of the remote controller 400 to the main body 200 by infrared rays at an upper corner.

  Inside the remote control main body 401, a control board (not shown) constituting a control function of the remote controller 400 and a battery (not shown) as a power source of the remote controller 400 are built.

  At the center of the front surface of the remote control main body 401, an ass washing switch 410 for starting ass washing, a bidet washing switch 411 for starting bidet washing for washing women's local washing, and ass washing and bidet washing are stopped. Stop switch 412, move cleaning switch 413 that periodically moves the cleaning position back and forth during buttocks cleaning and bidet cleaning, and cleaning strength periodically during buttocks cleaning A rhythm washing switch 414 is arranged.

  On the front upper part, the cleaning strength switch 415 that adjusts the cleaning strength during butt cleaning and bidet cleaning with two switches, and the cleaning position that adjusts the cleaning position during butt cleaning and bidet cleaning with two switches A position switch 416 and a nozzle disinfection switch 417 for cleaning the nozzle with warm water of 40 ° C. for about 1 minute are arranged.

  Also, above the cleaning strength switch 415, an LED intensity indicator 421 that displays the cleaning strength in five levels, and above the cleaning position switch 416, a position indicator that displays the cleaning position in five levels. 422 is arranged.

  On the upper surface of the remote control main body 401, a toilet lid switch 418 that electrically opens and closes the toilet lid and a toilet seat switch 419 that electrically opens and closes the toilet seat are installed, and the user arbitrarily selects the toilet seat 300 and the toilet lid 320 by the switch operation. Can be opened and closed.

  The human body detection sensor 450 is configured separately from the main body 200 and is attached to the wall surface of the toilet room. The human body detection sensor 450 includes a pyroelectric sensor (not shown) that receives infrared rays emitted from the human body, a sensor control unit (not shown) that determines detection of a human body by a signal from the pyroelectric sensor, and a sensor control unit. The human body detection signal is transmitted to the control unit of the main body 200 by infrared rays (not shown), a battery (not shown) that is a power source of the human body detection sensor 450, and the like.

<2> Configuration of Cleaning Unit FIG. 6 is a schematic diagram illustrating a configuration of a water circuit of the cleaning unit of the sanitary cleaning device.

  A cleaning unit 500 for cleaning a user's local part is built in the main body 200. The cleaning means 500 is formed by a nozzle device 800 that ejects cleaning water and a series of cleaning water supply passages that supply the cleaning water from the water supply connection port 510 to the nozzle device 800.

  As shown in FIG. 6, the cleaning water supply flow path includes a water supply connection port 510, a strainer 511, a check valve 512, a constant flow valve 513, a water stop electromagnetic valve 514, a relief valve 515, and a sub tank 600. The heat exchanger 700, the buffer tank 750, the water pump 516, and the flow control valve 517 are sequentially installed and connected to the nozzle device 800.

  A water supply connection port 510 to which a water pipe is connected is disposed below the right side of the main body 200, and a strainer 511 that prevents inflow of waste contained in tap water is stored inside the water supply connection port 510 and stored in the sub tank 600. A check valve 512 is incorporated to prevent the discharged water from flowing back into the water pipe.

  Downstream of the check valve 512, a constant flow valve 513 that keeps the amount of washing water flowing in the flow path constant, a water stop electromagnetic valve 514 that electrically opens and closes the flow path, and a relief valve 515 are integrally configured. ing.

  Downstream of the water stop solenoid valve 514, a sub tank 600 having an air release port, a heat exchanger 700 that instantaneously heats wash water, and a buffer tank that makes the temperature of hot water heated by the heat exchanger 700 uniform. 750 is connected.

  A water pump 516 is connected downstream of the buffer tank 750. A nozzle device 800 is connected to the downstream of the water pump 516 via a flow control valve 517, and each port of the flow control valve 517 has a bottom cleaning unit 831, a bidet cleaning unit 832, a nozzle in the nozzle device 800. A cleaning unit 833 is connected.

  As shown in FIGS. 7 and 8, among the members constituting the cleaning means 500, the water supply connection port 510, the strainer 511, the check valve 512, the constant flow valve 513, the water stop electromagnetic valve 514, the relief valve 515, the sub tank 600 The heat exchanger 700, the buffer tank 750, and the water pump 516 are integrated into a chassis 501 molded from a resin material, and are integrally formed.

  As shown in FIG. 7, the strainer 511 and the check valve 512 are integrated into the water supply connection port 510, and the constant flow valve 513 and the relief valve 515 are integrated into the water stop electromagnetic valve 514. The buffer tank 750 is integrated with the heat exchanger 700.

  The water supply connection port 510 and the water stop electromagnetic valve 514, the water stop electromagnetic valve 514 and the sub tank 600, the sub tank 600 and the heat exchanger 700 are not connected to each other through the connection tube or the like, and the mutual connection ports are connected via an O-ring which is a packing. It is configured to connect directly. Further, the members constituting these water circuits are installed and fixed at predetermined positions of the chassis 501.

  By adopting such a configuration, it is possible to improve the watertight structure and improve the arrangement accuracy of the members. In particular, by improving the placement accuracy of the sub-tank 600 and the heat exchanger 700, the control accuracy of the flow rate of the cleaning water can be improved, and the performance of the cleaning means 500 and the control accuracy can be improved.

  The water pump 516 is a piston pump that is a positive displacement pump. As shown in FIGS. 14 and 15, the outer shape is substantially L-shaped, and the rotational movement of the motor is reciprocated between the substantially cylindrical motor portion 516a. A link mechanism portion 516b that converts the motion and a piston portion 516c that is driven by a reciprocating motion of the link mechanism portion 516b. A water suction port 516d and a discharge port 516e are provided as connection ports on the outer surface of the piston portion 516c.

  When the water pump 516 having the above-described configuration is driven, the motor unit 516a having only the rotational motion is configured to generate less vibration than the link mechanism portion 516b and the piston portion 516c with reciprocating motion.

  By driving the motor unit 516a, the piston unit 516c starts reciprocating, sucks cleaning water from the water suction port 516d, and discharges cleaning water from the discharge port 516e. The cleaning water to be discharged is the piston unit 516c. It becomes a water flow with moderate pulsation with the reciprocating motion.

  The outer periphery of the substantially cylindrical motor portion 516a of the water pump 516 having the above-described configuration is surrounded by an elastic foamed resin cushioning member (not shown), and the substantially cylindrical water provided at the rear portion of the chassis 501. The link mechanism portion 516b and the piston portion 516c are suspended so as to hang downwards by being inserted into the pump installation portion 501a.

  The water pump installation part 501a is formed with a thin wall thickness, and is formed on an upper part of a rib-like leg part 501b that stands up from the bottom surface of the chassis 501. By forming the thin wall thickness, it is possible to obtain the effect of absorbing the vibration of the water pump 516 by the elasticity of the resin.

  Further, a hot water outlet 712 that is a connection port of the heat exchanger 700 in which the buffer tank 750 is integrally formed and a water suction port 516d that is a connection port of the water pump 516 are connected by a connection tube made of a soft resin.

  As described above, the motor unit 516a with less vibration is installed in the water pump installation unit 501a formed with a thin thickness of the chassis 501 via the buffer member, and the link mechanism unit 516b and the piston unit 516c that generate a lot of vibrations. Is suspended in a free state, and is connected to the buffer tank 750 by a connection tube 502 made of a soft resin, so that vibration generated when the water pump 516 is driven is applied to the chassis 501, other members, and the main body 200. It becomes possible to suppress the transmission, and the effect of improving the comfort and durability of the sanitary washing device can be obtained.

  In particular, the water pump 516 is supported by two different materials, a foamed resin cushioning member and an elastic resin forming the water pump installation portion 501a, so that vibrations in a wide range of frequencies are absorbed. The transmission of vibration to the main body can be effectively suppressed.

<3> Configuration of Sub-tank FIG. 9 is a perspective view showing the appearance of the sub-tank, FIG. 10 is a cross-sectional view in the lateral direction of the sub-tank, and FIG. 11 is a cross-sectional view in the front-rear direction of the sub-tank. .

  As shown in FIG. 9, the sub-tank 600 includes a tank main body 610 formed of a resin material, a water level detection sensor 620 that detects the level of the cleaning water stored in the tank main body 610, and the cleaning supplied to the tank main body 610. It is comprised with the incoming water temperature sensor 630 which consists of a thermistor which detects the temperature of water.

  The tank body 610 includes a front tank 611 that constitutes the front wall, both side walls, the bottom surface, and the top surface of the tank, a rear tank 612 that constitutes the rear wall of the tank, and an air release portion disposed on the top surface of the tank body 610. 613 and three members. The overall shape of the tank body 610 is formed by a plurality of planes including a front wall, a rear wall, both side walls, a bottom surface, and a top surface, and the shape in plan view is a substantially square shape. The front wall has an inclined part that retreats from the middle, the side view shape is formed in a substantially trapezoidal shape in which the upper part is thinner than the lower part, and the cross-sectional area of the upper part of the tank body 610 is smaller than the lower part. .

  A water inlet 601 is provided at the lower part of one side wall of the tank main body 610, and a water outlet 602 is provided at the lower rear wall of the tank main body 610. The tank main body 610 is disposed on the top surface of the tank main body 610. An air opening 603 that communicates the inside and the outside of 610 is provided. By providing the air opening 603, the air accumulated in the tank main body 610 can be released to the outside, and the internal pressure of the tank main body 610 can be constantly maintained at atmospheric pressure.

Since the interior of the sub tank 600 is always maintained at atmospheric pressure, the flow path from the downstream of the sub tank 600 to the water inlet 516d of the water pump 516 is also maintained at atmospheric pressure, so that the water pump 516 is affected by fluctuations in water pressure. Therefore, a stable pump function can be exhibited.

  A buffer part 613a having a large cross-sectional area of the flow path is formed in the flow path communicating with the open air opening 603 of the open air part 613, so that the washing water is likely to flow out from the open air opening 603 with bubbles. In such a case, the cleaning water is once stored in the buffer unit 603a, thereby having a function of suppressing outflow from the atmosphere opening port 603.

  A partition wall 614 is provided inside the tank body 610, and the interior of the tank body 610 is divided into two tanks, a water tank 615 and a storage tank 616, by the partition wall 614. A water inlet 601 is provided near the bottom of the side surface of the water tank 615, and a water outlet 602 is provided near the bottom of the rear wall of the storage tank 616.

  By providing the partition wall 614 and forming the water tank 615 and the storage tank 616, when air is contained in the wash water flowing from the water inlet 601, the air opens from the upper part of the water inlet 615 to the atmosphere opening port 603. Since it passes through and is discharged to the outside, only cleaning water that does not contain air can flow into the storage tank 616.

  Above the water tank 615, a barrier 617 is provided between the upper surface opening 615a of the water tank 615 and the atmosphere opening 613 and protrudes in a substantially horizontal direction from the side wall of the tank body 610. The barrier 617 has a size that covers the entire upper surface opening of the water tank 615.

  In addition, a plurality of rectifying ribs 618 protruding alternately in a substantially horizontal direction are formed on the side wall and the partition wall 614 of the tank body 610 inside the water tank 615.

  The wash water flowing in from the water inlet 601 first flows into the lower part of the water inlet tank 615 and rises in the water inlet tank 615 while changing the flow direction at the rectifying rib 618. At this time, when the pressure of the washing water flowing in from the water inlet 601 is high, or when the flow is significantly disturbed including a large amount of air, the flow is appropriately rectified by the rectifying rib 618 and the flow of the rectifying rib 618 is increased. Air contained in the wash water is separated by vortices generated on the downstream side.

  The wash water from which the air rising in the water tank 615 is separated passes over the upper end of the partition wall 614 and flows into the storage tank 616 to be stored.

  At this time, even if the pressure of the cleaning water flowing in from the water inlet 601 is high or the flow is significantly disturbed including a large amount of air, the upward flow of the cleaning water is suppressed by the barrier 617, and the cleaning water Directly hitting the atmosphere opening portion 613 and preventing the sub tank 600 from flowing out from the atmosphere opening port 603 is prevented.

  As described above, the wash water flowing in from the water inlet 601 is separated from the air contained in the wash water while rising in the water inlet tank 615, and the separated air is released from the atmosphere opening 603 to the outside of the tank body 610. The Wash water that does not contain air is stored in the storage tank 616 and supplied to the heat exchanger 700 from the water outlet 602.

  When air is mixed in the washing water supplied from the sub tank 600 to the heat exchanger 700, bubbles are generated inside the heat exchanger 700, and the temperature inside the heat exchanger 700 is abnormally increased, and heat exchange is performed. The apparatus 700 may be damaged, and by providing the partition wall 614 to prevent air from entering, the effect of preventing the heat exchanger 700 from being damaged can be obtained.

  The water level detection sensor 620 includes a common electrode 621 serving as a common electrode and a plurality of water level electrodes 622 installed for each water level. In the present embodiment, one common electrode 621 and two water levels are provided. An electrode 622 is used. The common electrode 621 and the water level electrode 622 are made of a stainless material.

  A common electrode 621 is disposed on the inner surface of the lower front wall of the tank body 610, and a water level electrode 622 is disposed on the inner surface of the rear wall of the tank body 610. The water level electrode 622 includes an upper limit electrode 623 provided at the upper portion and a lower limit electrode 624 provided at the lower portion. The common electrode 621 is installed at a position lower than the lower limit electrode 624, and the common electrode 621 is always in a flooded state in a normal use state.

  By installing the common electrode 621 and the upper limit electrode 623 and the lower limit electrode 624 which are the water level electrodes 622 on different surfaces, it is possible to prevent the residual water adhering to the inner surface of the tank body 610 from being erroneously detected as stored water. Can be obtained.

  The water level is detected by applying a direct current between the common electrode 621 and the water level electrode 622 and changing the voltage depending on whether or not the water level electrode 622 is submerged. That is, when the wash water flows into the storage tank 616 and the water level rises and the lower limit electrode 624 and the upper limit electrode 623 are submerged, the voltage between the common electrode 621, the lower limit electrode 624 and the upper limit electrode 623 decreases, thereby causing the control unit 130. Detects the water level.

  The upper limit electrode 623 is used for detecting the upper limit water level, and the lower limit electrode 624 is used for detecting the lower limit water level. The upper limit electrode 623 is installed at a position lower than the atmosphere opening port 603, thereby preventing washing water from flowing out from the atmosphere opening port 603. In addition, the lower limit electrode 624 is installed above the water outlet 602, so that air can be prevented from flowing into the heat exchanger 700.

  Moreover, the control part 130 becomes a structure applied, reversing the polarity of the direct current applied to an electrode periodically. When a direct current is applied between the common electrode 621 and the water level electrode 622 via the washing water, the electrode is deteriorated in a short time due to the metal forming the electrode being eluted by the action of electrolysis due to oxidation and ionization. And the deterioration of the electrode can be suppressed by periodically inverting the polarity of the current.

  In the present embodiment, the polarity reversal interval is set to a time corresponding to the AC power supplied as the power supply of the sanitary washing device, and when the supplied AC power is 50 Hz, 1/50 second, When the supplied AC power is 60 Hz, 1/60 second is set.

  In the sanitary washing device 100 according to the present embodiment, when the water stop electromagnetic valve 514 is opened and the wash water is supplied to the sub tank 600 and the upper limit water level is detected, the water stop electromagnetic valve 514 is closed and the water supply is stopped. The sub tank 600 is full of water. When a normal cleaning operation is performed from the sub tank 600 in a full state, the water level decreases. When the lower limit water level is detected, the water stop solenoid valve 514 is opened again and cleaning water is supplied to the sub tank 600, and the upper limit water level is detected. Water supply is continued until

  The maximum amount of washing water stored in the sub tank 600 is 100 cc, and the amount of water from the upper limit water level to the lower limit water level is 65 cc.

The flow rate of cleaning water used for cleaning is 450 cc / min when cleaning is performed with the strongest cleaning power, and is set to 260 cc / min when cleaning is performed with the weakest cleaning power. In this case, the time until the cleaning water reaches the lower limit water level from the upper limit water level is 8.7 seconds when cleaning is performed with the strongest cleaning power, and is 15 seconds when cleaning is performed with the weakest cleaning power.

  In general, since the time required for the user to clean the local area is 30 seconds or more, 130 cc of cleaning water is used even when cleaning is performed with the weakest cleaning power, and at least once in one cleaning operation. A change from the upper limit water level to the lower limit water level can be detected.

  The control unit 130 measures the elapsed time from the upper limit water level to the lower limit water level, calculates the flow rate by calculating the measured time and the amount of water (65 cc) from the upper limit water level to the lower limit water level, and sets each cleaning strength. If there is a difference from the flow rate, the flow rate of the cleaning water is corrected by adjusting the output of the water pump 516.

  In addition, although the sub tank 600 of the present embodiment has a substantially rectangular bottom surface, it is not limited to this, and may be another polygonal shape.

  Further, in the present embodiment, the common electrode 621 and the water level electrode 622 are installed on the front wall and the rear wall, which are wall surfaces facing each other. However, the present invention is not limited to this. And may be installed on adjacent walls such as side walls.

  As another installation example of the common electrode 621 and the water level electrode 622, the common electrode 621 may be installed on the front wall and the water level electrode 622 may be installed on the top surface. At this time, the ends of the lower limit electrode 624 and the upper limit electrode 623 are changed in length so as to be positioned at the lower limit water level and the upper limit water level, respectively.

  In the present embodiment, the upper electrode 623 and the lower electrode 624 are provided as the water level electrode 622. However, the present invention is not limited to this, and the water level detection is performed by arranging three or more water level electrodes 622. By subdividing the interval, the accuracy of water level detection and flow rate detection can be improved.

<4> Correction of Threshold for Water Level Detection FIG. 12 is a graph showing a change in output voltage between the upper limit electrode and the common electrode, and a threshold value for determining a flooded state and a non-immersed state of the upper limit electrode. It is a graph which shows the threshold value which determines the change of the output voltage with a common electrode, and the submerged state and non-submerged state of a lower limit electrode.

  As described above, the detection data detected by the sub-tank water level detection sensor 620 in the present embodiment is not only used for detecting the water level, but is used for flow rate detection by arithmetic processing, and has a high detection level. Accuracy is required.

  When the water level is detected by a change in the output voltage between the two electrodes, the output voltage that changes due to the contact and separation between the water level electrode 622 and the water surface of the cleaning water is compared with a threshold value. Variations occur depending on the conductivity and temperature of the wash water.

  In the case of sanitary washing equipment, it is difficult to limit the washing water used to make the conductivity constant, and a dedicated detection sensor should be used to detect and correct the conductivity during use. Therefore, in this embodiment, it is possible to deal with washing water having a wide range of conductivity by performing temperature correction using detection data of the incoming water temperature sensor 630 installed in the sub tank 600. I have to.

As shown in FIG. 12, the output voltage between the upper limit electrode 623 and the common electrode 621 is 5 ° C., as shown by the broken line in the graph, when the upper limit electrode 623 is not submerged. In this case, the voltage is about 4.7 V, and in the case of 40 ° C., the voltage is about 4.4 V, which changes substantially linearly with respect to the temperature change. Further, in the state where the upper limit electrode 623 is submerged, it is about 2 V when the incoming temperature of the washing water is 5 ° C., and about 1.4 V when it is 40 ° C., which changes substantially linearly with respect to the temperature change. doing.

  As described above, since the output voltage changes depending on the incoming water temperature, it is possible to make a false detection when the threshold value for determining whether the upper limit electrode 623 is submerged or not submerged is constant, or when cleaning water having different conductivity is used. Therefore, it is effective to correct the temperature corresponding to the incoming temperature of the wash water.

  As shown by the solid line in the graph of FIG. 12, the threshold value is 3.9 V between 0 ° C. and 5 ° C., the threshold value is 3.3 V between 35 ° C. and 40 ° C., and 5 ° C. between 0 ° C. and 40 ° C. A threshold value is set step by step.

  As shown in FIG. 13, when the lower limit electrode 624 is not submerged, the output voltage between the lower limit electrode 624 and the common electrode 621 is 5 ° C. as shown in the broken line of the graph. In this case, it is about 3.5 V, and in the case of 40 ° C., it is about 2.9 V, and changes substantially linearly with respect to the temperature change. In the state where the lower limit electrode 624 is submerged, it is about 1.5 V when the incoming temperature of the washing water is 5 ° C., and about 1 V when the incoming temperature is 40 ° C., and changes substantially linearly with respect to the temperature change. doing.

  As in the case of the upper limit electrode 623 as described above, since the output voltage changes depending on the incoming water temperature, there is a possibility of false detection when cleaning water having different conductivity is used when the threshold value is made constant. The threshold value is corrected corresponding to the incoming temperature of the wash water.

  As shown by the solid line in the graph of FIG. 13, the threshold value is 3.5 V between 0 ° C. and 5 ° C., the threshold value is 2.9 V between 35 ° C. and 40 ° C., and 5 ° C. between 0 ° C. and 40 ° C. A threshold value is set step by step.

  Based on the temperature detection data of the incoming water temperature sensor 630, the control unit 130 corrects the water level detection threshold values corresponding to the upper limit electrode 623 and the lower limit electrode 624 as described above, thereby accurately determining the water level of washing water having a wide range of conductivity. Can be detected.

<5> Configuration of Heat Exchanger FIG. 14 is a perspective view showing the appearance of the heat exchanger, and FIG. 15 is a sectional view of the heat exchanger.

  In the heat exchanger 700 in the present embodiment, a buffer tank 750 is integrally formed, and the buffer tank 750 is installed on the top of the heat exchanger 700.

  As shown in FIG. 14, the heat exchanger 700 has a substantially rectangular flat plate shape when viewed from the front, and a casing 701 formed of reinforced ABS resin in which glass fiber is compounded with ABS resin, a flat plate heater 702 made of ceramic, and a hot water source. The member 703 is a main constituent member.

  The casing 701 is composed of a front member 710 constituting the front part and a rear member 720 constituting the back part, and a flat heater 702 is installed in a space formed between the front member 710 and the back member 720. Yes. A gap formed in the facing portion between the front member 710 and the flat heater 702 and the facing portion between the back member 720 and the flat heater 702 is used as a heating channel 715, and the washing water flowing through the heating channel 715 is used as the flat heater. In 702, the temperature is instantaneously increased.

  The heat exchanger 700 includes a water inlet 711 that is a connection port on the right side of the front lower end of the front member 710, and a hot water outlet 712 that is a connection port on the hot water outlet member 703 installed at the upper right side of the front member 710. It has.

  As shown in FIG. 15, a water inlet channel 713 connected to the water inlet 711 is provided over substantially the entire width of the lower end portion of the casing 701. A plurality of slits 714 are provided across the entire width of the upper surface of the water inlet channel 713, and the cleaning water that has flowed into the water inlet channel 713 passes through the slit 714 and flows into the heating channel 715. The slits 714 allow the cleaning water to flow evenly over the entire width of the heating channel 715.

  A partition rib 716 is provided at the upper end of the heating channel 715, and a buffer tank 750 is located above the partition rib 716. The partition rib 716 is provided with a plurality of water passage holes 717 over substantially the entire width, and the cleaning water heated in the heating flow path 715 flows into the buffer tank 750 through the water passage holes 717. ing.

  Protrusions 718 having a substantially semicircular cross-sectional shape are provided in the buffer tank 750 at intervals over substantially the entire width. The washing water flowing in the buffer tank 750 toward the hot water outlet 712 is disturbed by the projection 718, so that the washing water is mixed and the temperature variation of the washing water is eliminated, and the washing water having a uniform temperature is produced. The hot water is discharged from the gate 712.

  Two thermistors are installed in the hot water outlet member 703, one is a hot water temperature sensor 730 that detects the hot water temperature of the wash water, and the other is an excessive temperature sensor 731 that detects the excessive temperature of the heat exchanger 700. It is.

<6> Configuration of Nozzle Device FIG. 18 is a perspective view showing a storage state of the nozzle device in the present embodiment, FIG. 19 is a cross-sectional view taken along line AA shown in FIG. 18, and FIG. 21 is a longitudinal sectional view, FIG. 21 is a detailed sectional view of a portion B shown in FIG. 20, FIG. 22 is a sectional view of CC shown in FIG. 21, and FIG. 23 is a transverse sectional view of the storage state of the nozzle device. FIG. 24 is a detailed cross-sectional view of a portion D shown in FIG. 23, FIG. 25 is a vertical cross-sectional view showing a bottom cleaning state of the nozzle device, and FIG. 26 is a detailed cross-sectional view of a portion E shown in FIG. 27 is a longitudinal sectional view showing the bidet cleaning state of the nozzle device, FIG. 28 is a detailed sectional view of the F portion shown in FIG. 27, and FIG. 29 is a transverse sectional view of the nozzle portion showing the bidet cleaning state of the nozzle device. FIG. 30 is a detailed sectional view of a portion G shown in FIG.

  As shown in FIG. 18, the nozzle device 800 drives a substantially triangular frame-shaped support portion 810 molded from a resin material, a nozzle portion 820 that moves forward and backward along the support portion 810, and the forward and backward movement of the nozzle portion 820. And a flow control valve 517 for switching the supply of the washing water to the nozzle unit 820.

  In the present embodiment, the arrangement direction of each component is described with the storage direction of the nozzle portion as the rear, the advance direction of the nozzle portion 820 as the front, the right side from the rear toward the front, the right side as the left side, and the left side as the left side. To do.

  The support part 810 is formed in a substantially triangular frame shape when viewed from the side, and an inclined part 812 that descends from the rear part toward the front part with respect to the substantially horizontal base part 811, and rear ends of the base part 811 and the inclined part 812. A vertical side 813 is formed to join the two. A guide rail 814 for guiding the forward and backward movement of the nozzle portion 820 and a rack guide 815 for guiding the flexible rack 861 of the driving portion 860 are formed on the inclined portion 812 over substantially the entire length. A substantially cylindrical holding portion 816 that supports the nozzle portion 820 so as to surround the nozzle portion 820 is integrally formed below the front end of the inclined portion 812.

As shown in FIG. 19, the guide rail 814 for guiding the nozzle portion 820 has a substantially T-shaped cross section. The rack guide 815 for guiding the flexible rack 861 has a substantially U-shaped cross section with one side open, and guides the upper and lower surfaces and one side of the flexible rack 861 by regulating them. It has a configuration.

  The rack guide 815 is also formed continuously from the inclined portion 812 to the vertical side portion 813 and the bottom side portion 811 of the rear portion of the support portion 810, and the inclined portion 812, the vertical side portion 813, the vertical side portion 813, and the bottom side portion. The corner 811 is connected in an arc shape. The cross-sectional shape of the rack guide 815 formed in the vertical side portion 813 and the bottom side portion 811 is also substantially U-shaped, but the open side surface is the left side in the inclined portion, whereas the vertical side portion 813 and the bottom side The right side surface is opposite to the portion 811. The open surfaces of the rack guides 815 of the vertical side 813 and the bottom 811 are closed by a support lid that is a separate member.

  The drive unit 860 that moves the nozzle unit 820 forward and backward along the guide rail 814 rotates the flexible rack 861 coupled to the nozzle unit 820, the pinion gear 862 that meshes with the flexible rack 861, and the pinion gear 862. A drive motor 863 is used.

  The drive motor 863 is a stepping motor, and the rotation angle is controlled by a pulse signal. The flexible rack 861 is driven via the pinion gear 862 when the drive motor 863 rotates.

  A gap is provided between the inner peripheral surface of the holding portion 816 of the support portion 810 and the outer peripheral surface of the nozzle portion 820, and the cleaning water ejected from the nozzle portion 820 and the inner peripheral surface of the holding portion 816 and the nozzle The nozzle portion 820 is cleaned by flowing into a gap formed between the outer peripheral surface of the portion 820 and the outer peripheral surface of the nozzle portion 820.

  In addition, a nozzle lid 801 that opens and closes by the forward and backward movement of the nozzle portion 820 is provided in front of the holding portion 816 so that the nozzle portion 820 is closed when the nozzle portion 820 is housed. It becomes the structure which prevents being contaminated by etc.

  A water supply joint that connects a water supply tube (not shown) connected to the cleaning water supply means and a connection tube 802 that supplies cleaning water from the support portion 810 to the flow control valve 517 is connected to the bottom portion 811 of the support portion 810. 817 is formed.

  The nozzle portion 820 includes a rod-shaped nozzle body 830 molded from a resin material, a cylindrical nozzle cover 840 that covers substantially the entire nozzle body 830, and a connecting unit 850 that pulls the nozzle cover 840 with the nozzle body 830. Has been.

  The nozzle body 830 includes a hip cleaning unit 831 that cleans the local part, a bidet cleaning unit 832 that cleans the female local part, and a nozzle cleaning unit 833 that cleans the nozzle part 820.

  The buttocks cleaning unit 831 includes an buttocks cleaning jet 834 that opens upward at the tip of the nozzle body 830 and an buttocks cleaning channel 835 that communicates with the buttocks cleaning jet 834 from the rear end of the nozzle body 830. Has been. The buttocks washing flow path 835 is installed in the lower part of the nozzle body 830, and is bent upward and below the buttocks washing ejection port 834. The baffle has a rectifying plate 835a that rectifies the flow of washing water. Is installed. The washing water ejected from the butt washing ejection port 834 passes through the ejection opening 844 of the nozzle cover 840 and is ejected upward.

  The bidet cleaning unit 832 includes a bidet cleaning jet 836 disposed behind the butt cleaning jet 834 and a bidet cleaning channel 837 that communicates with the bidet cleaning jet 836 from the rear end of the nozzle body 830. . The washing water ejected from the bidet washing outlet 836 passes through the ejection opening 844 of the nozzle cover 840 and is ejected upward.

  The nozzle cleaning unit 833 includes a nozzle cleaning ejection port 838 disposed on the side surface of the nozzle body 830 and a nozzle cleaning channel 839 that communicates with the nozzle cleaning ejection port 838 from the rear end of the nozzle body 830. The washing water ejected from the nozzle cleaning ejection port 838 is ejected into the nozzle cover 840 and discharged from the nozzle cover 840 drainage port 845 to the outside of the nozzle cover 840. The washing water ejected from the nozzle cleaning jet outlet 838 is used for cleaning the nozzle portion 820 and its surroundings.

  The nozzle part 820 is supported in a state where the front part is inserted in the holding part 816 of the support part 810, and the rear part is slidably installed in a state where it is suspended on the guide rail 814, as shown in FIG. The storage position where the nozzle part 820 is stored behind the holding part 816, as shown in FIG. 25, the buttocks washing position where the nozzle part 820 protrudes from the holding part 816, and the bidet cleaning position shown in FIG. It is possible to advance and retreat between.

  The nozzle cover 840 includes a nozzle cover main body 841 and a connecting member 842. The nozzle cover main body 841 is formed by forming a thin stainless steel plate into a cylindrical shape, the front end surface is a closed surface, and the rear end surface is an open surface. The connecting member 842 has a substantially cylindrical shape molded from a resin material, and connecting pieces 843 that engage with the nozzle body 830 are formed on both sides.

  In addition, a nozzle cover stopper that regulates the sliding range of the nozzle cover 840 is integrally formed on the right side of the rear end of the connecting member 842. The front stopper receiving portion and the rear stopper receiving portion formed on the support portion 810 are integrally formed. The sliding range is restricted by the contact.

  A part of the connecting member 842 is fixed and integrated in a state of being inserted into the nozzle cover main body 841 from the opening at the rear end of the nozzle cover main body 841. On the front upper surface of the nozzle cover main body 841, one jet opening 844 is provided so that the bottom cleaning jet 834 and the bidet cleaning jet 836 of the nozzle main body 830 can face each other. Further, a drain outlet 845 is provided on the front lower surface of the nozzle cover main body 841 to discharge cleaning water that has flowed into the nozzle cover main body 841 to the outside.

  The inner diameter of the nozzle cover 840 is slightly larger than the outer diameter of the nozzle body 830, and the dimensional relationship that allows the nozzle body 830 and the nozzle cover 840 to slide smoothly with each other with the nozzle body 830 inserted into the nozzle cover 840. It has become.

  A flow control valve 517 is installed on the rear end surface of the nozzle body 830. The flow control valve 517 includes a disc-type valve main body 517a and a stepping motor 517b that drives a switching operation. The flow control valve 517 selectively supplies cleaning water to the buttocks cleaning channel 835, the bidet cleaning channel 837, and the nozzle cleaning channel 839.

  Further, a water supply port 517c for supplying cleaning water to the flow control valve 517 is installed on the outer surface of the valve main body 517a of the flow control valve 517, and the connection tube 802 communicating with the water supply joint 817 of the support portion 810 is installed in the water supply port 517c. Are joined.

  Next, the connection means 850 configured by the connection member 842 of the nozzle cover 840 and the connection receiving portion 851 of the nozzle body 830 will be described.

As shown in FIGS. 24 and 30, a connection receiving portion 851 is formed on the right outer periphery of the rear end portion of the nozzle body 830. The connection receiving portion 851 is formed with two substantially V-shaped grooves, and two front concave portions 851a at the front and two rear concave portions 851b at the rear are arranged at intervals in the front-rear direction. The interval between the front recessed portion 851a and the rear recessed portion 851b is the same as the bottom cleaning outlet 834 and the bidet cleaning outlet 83.
The size is equal to the interval of 6.

  On the other hand, the connecting member 842 of the nozzle cover 840 is formed of a substantially cylindrical resin material, and a connecting piece 843 protruding rearward is formed on both sides of the rear part, and the rear end of the connecting piece 843 is inwardly provided. A protruding substantially V-shaped connecting protrusion 843a is formed.

  In a state where the nozzle body 830 is inserted into the nozzle cover 840, the connection protrusion 843a is always pressed against the connection receiving portion 851 of the nozzle body 830 by the elasticity of the connection member 842 of the nozzle cover 840, and the connection protrusion 843a is In a state where the front concave portion 851a or the rear concave portion 851b is engaged, the nozzle main body 830 and the nozzle cover 840 are connected, and the nozzle cover 840 can be pulled and moved by the nozzle main body 830.

  As shown in FIG. 24, in a state where the connecting projection 843a enters the front recess 851a, as shown in FIG. 28, the bidet cleaning outlet 836 of the nozzle body 830 and the outlet opening 844 of the nozzle cover 840 face each other. Thus, as shown in FIG. 30, in the state where the connecting projection 843a enters the rear recessed portion 851b, as shown in FIGS. 21 and 26, the buttocks cleaning jet outlet 834 and the jet opening 844 are opposed to each other. .

<7> Control and Operation of Cleaning Means FIG. 31 shows a time chart of the cleaning means during initial use, and FIG. 32 shows a time chart of the cleaning means during normal use.

  The basic operation of the cleaning means 500 is that tap water flowing through the water pipe is supplied from the water supply connection port 510 as cleaning water, and the cleaning water is supplied to the sub tank 600 by opening the water stop solenoid valve 514. Is done. The flow rate of the cleaning water flowing in the flow path is kept constant by the constant flow valve 513. The drive of the water stop solenoid valve 514 is controlled by the control unit 130 based on the operation of the remote controller 400 and the operation unit 210.

  The washing water supplied to the sub tank 600 is stored in the sub tank 600 and also supplied to the heat exchanger 700 and the water pump 516. When the water pump 516 is driven, the cleaning water is supplied to the nozzle device 800 via the flow control valve 517. The driving of the water pump 516 is controlled by the control unit 130 based on the operation of the remote controller 400 and the operation unit 210. The control unit 130 drives the water pump 516 and starts energizing the flat heater 702 of the heat exchanger 700 to start heating the cleaning water.

  The control unit 130 controls energization to the flat heater 702 based on detection information from the incoming water temperature sensor 630 and the hot water temperature sensor 730, and maintains the temperature set by the hot water temperature switch 231 of the operation unit 210 for the cleaning water.

  The control unit 130 controls the flow control valve 517 based on operation information of the operation unit 210 and the remote controller 400, and the cleaning water is supplied to any of the butt cleaning unit 831, the bidet cleaning unit 832, and the nozzle cleaning unit 833 of the nozzle device 800. Supply. Accordingly, the cleaning water is ejected from any one of the buttocks cleaning outlet 834, the bidet cleaning outlet 836, and the nozzle cleaning outlet 838.

  Next, details of control related to the sub-tank 600, which is a characteristic configuration of the present embodiment, particularly water level detection and flow rate detection will be described.

FIG. 31 shows the cleaning means in the initial use when the cleaning water is not stored in the cleaning means, such as when it is used for the first time after installation of the sanitary washing apparatus, or when it is reused after draining operation to prevent freezing. The time chart of each function of is shown.

  At the time P1 when the cleaning switch (for example, the buttocks cleaning switch 221 or 410) of the operation unit 210 or the remote controller 400 is operated, the control unit 130 starts energizing the water stop electromagnetic valve 514 and starts supplying cleaning water. At the same time, driving of the water level detection sensor 620 is started. The driving of the water level detection sensor 620 is continued until the buttocks cleaning stop P7.

  When the water level detection sensor 620 detects the upper limit water level at P2, the control unit starts measuring time and stops supplying the washing water by stopping energization of the water stop electromagnetic valve 514 at a time P3 when a predetermined time has elapsed. In the present embodiment, energization is stopped 2 seconds after the upper limit water level is detected.

  At the time point P2 when the upper limit water level is detected, the sub tank 600 and the heat exchanger 700 are basically full of water, but by continuing the supply for an extra 2 seconds, the heat exchanger 700 and the water pump 516 Make sure to fill the wash water.

  As a result, the air in the heat exchanger 700 can be eliminated and the washing water can be filled with water, so that the heat exchanger 700 can be reliably prevented from being blown, and safety and durability are improved. can do. In addition, the water supply function of the water pump 516 can be reliably activated by reliably supplying wash water to the water pump 516 to make it full.

  The control unit 130 starts driving the water pump 516 at the time point P3 when the energization of the water stop electromagnetic valve 514 is stopped, and operates the flow control valve 517 to supply the washing water to the bottom washing flow path 835 of the nozzle unit 820. Start supplying.

  By driving the water pump 516, the water level of the sub tank 600 is lowered, and the control unit 130 starts driving the heat exchanger 700 at the time P4 when the detection of the upper limit water level is canceled by the water level detection sensor 620. By detecting a drop in the water level, it can be confirmed that the water pump 516 is operating normally, and an abnormal temperature rise of the heat exchanger 700 can be prevented.

  The cleaning water supplied to the buttocks cleaning channel 835 is ejected from the buttocks cleaning jet outlet 834. The jetted cleaning water passes through the jet opening 844 and is reflected on the inner surface of the holding portion 816 provided at the tip of the support portion 810 to clean the outer surface of the nozzle cover 840. This cleaning operation is called pre-cleaning. The pre-cleaning is continued until time point P5, which is 2 seconds after the hot water temperature of the heat exchanger 700 reaches 25 ° C.

  When the pre-cleaning is completed at the time point P5, the control unit 130 starts driving the driving unit 860 of the nozzle device 800, and advances the nozzle unit 820 from the storage position to the buttocks cleaning position. During the movement from the storage position to the buttocks cleaning position, the flow control valve 517 is switched to supply cleaning water to the nozzle cleaning flow path 839. The cleaning water supplied to the nozzle cleaning flow path 839 is jetted into the nozzle cover 840 from the nozzle cleaning jet port 838, and the jetted cleaning water cleans the inner surface of the nozzle cover 840 and then the drain port 845 to the outside of the nozzle cover 840. To leak. In the meantime, the nozzle part 820 is warmed by the washing water, and it is possible to suppress the feeling of discomfort due to the cold water jetting out at the time of the hip cleaning performed later.

  At time P6 when the nozzle unit 820 reaches the buttocks cleaning position, the control unit 130 switches the flow control valve 517 and starts supplying cleaning water to the buttocks cleaning channel 835. The cleaning water supplied to the buttocks cleaning flow path 835 is ejected from the buttocks cleaning outlet 834 and passes through the ejection opening 844 to clean the user's local area. The buttocks cleaning operation is continued until a time point P11 at which the cleaning stop operation is performed.

  While the heat exchanger 700 is being driven, the control unit 130 controls the wash water to a set temperature based on the detection data of the incoming water temperature sensor 630 and the hot water temperature sensor 730.

  By continuing to drive the water pump 516, the water level in the sub-tank 600 decreases, and at the time P7 when the water level detection sensor 620 detects the lower limit water level, the control unit 130 starts energizing the water stop solenoid valve 514 to detect the water level. The energization is continued until time P8 when the sensor 620 detects the upper limit water level.

  At time P8 when the upper limit water level is detected, the control unit 130 stops energization of the water stop solenoid valve 514 and starts measuring time, and then measures the elapsed time until time P9 when the water level detection sensor 620 detects the lower limit water level. To do. At time P9 when the lower limit water level is detected, the control unit 130 calculates the flow rate by calculating the measured elapsed time and the amount of water (65 cc) from the upper limit water level to the lower limit water level. If there is a difference from the flow rate set for each cleaning strength at the calculation end point P10, the output of the water pump 516 is adjusted to correct the flow rate of the cleaning water.

  At the time point P11 when the operation unit 210 or the remote controller 400 is operated to stop cleaning, energization of the water pump 516 and the heat exchanger 700 is stopped, and the nozzle device 800 starts to drive the drive unit 860, and the nozzle The part 820 moves backward from the buttocks cleaning position to the storage position.

  At the time point P12 when the nozzle unit 820 is retracted to the storage position, the driving of the driving unit 860 of the nozzle device 800 is stopped, the water pump 516 and the heat exchanger 700 are driven again, and cleaning is started after cleaning the nozzle unit 820. When the predetermined time has elapsed, the driving of the water pump 516 and the heat exchanger 700 is stopped at the time P13, and the post-cleaning is finished.

  The water stop solenoid valve 514 is energized again at the time P13 when the post-cleaning of the nozzle portion 820 is completed, the wash water is supplied to the sub tank 600, and the power supply to the water stop solenoid valve 514 is stopped at the time P14 when the upper limit water level is detected. Then, a series of control of the buttocks cleaning is completed, and the cleaning means is in a standby state when the sub tank 600 is full of water.

  FIG. 32 is a sanitary washing apparatus in a standby state in which the initial use has been carried out before, and shows a time chart during normal use when the washing operation is carried out.

  The difference from the case of the initial use shown in FIG. 31 is that the sub tank 600 is already full at the time point P20 when the cleaning operation is performed, and that the control unit 130 stores that the initial use has been performed. is there.

  As shown in FIG. 32, at the time point P20 when the operation switch 210 or the cleaning switch (for example, the buttocks cleaning switch 221 or 410) of the remote controller 400 is operated in the standby state where the sub tank 600 is full, the control unit 130 Then, the energization of the water stop solenoid valve 514 is started to start the supply of cleaning water, and the energization of the heat exchanger 700 is simultaneously started based on the stored data on which the initial operation has already been controlled. Further, the pre-cleaning operation of the nozzle device 800 is started simultaneously. Moreover, the drive of the water level detection sensor 620 is started simultaneously.

  The control from the time point of the cleaning operation to the time point of starting the energization of the heat exchanger 700 is different from the case of the initial use described above, and the control and operation after the time point P5 when the driving of the nozzle device 800 is started are different. It is the same.

As described above, the sanitary washing device in the present embodiment detects the change in the water level by the water level detection sensor provided in the sub tank without separately providing a dedicated flow rate sensor for detecting the flow rate in the configuration of the cleaning means. Since the flow rate is detected by calculation, the configuration of the cleaning means can be simplified and the cost can be reduced.

  Moreover, by correcting the threshold value for determining the output voltage change between the electrodes in the water level detection by the temperature, the accuracy of the water level detection and the flow rate detection can be improved, and water with different conductivity can be removed over a wide range. By being able to be used as cleaning water, it is possible to improve the usage range and usability of the sanitary cleaning device.

  In addition, during initial use of the sanitary washing device, water flow continues for a predetermined time after detection of the sub tank full condition, and after the water pump is driven, the heat exchanger starts energizing after the detection of the upper limit water level is eliminated. Therefore, it is possible to prevent the heat exchanger from being blown, and to ensure safety and reliability at a low cost with a simple configuration, compared to the means for preventing air blow using a commonly used flow sensor. can do.

(Embodiment 2)
FIG. 33 is a perspective view showing the appearance of the sub-tank in the second embodiment, FIG. 34 shows a cross-sectional view in the lateral direction of the sub-tank, FIG. 35 shows a cross-sectional view in the front-rear direction of the sub-tank, and FIG. The schematic diagram of the top | upper surface part in the full condition of a subtank is shown.

  The difference between the present embodiment and the first embodiment is the configuration of the sub-tank, and the other configurations of the sanitary washing apparatus are the same as those of the first embodiment, and the description thereof is omitted. In addition, in the following description, what attached | subjected the same code | symbol as Embodiment 1 is the same structure.

  As shown in FIG. 33, the sub-tank 650 includes a tank body 660 formed of a resin material, a water level detection sensor 620 for detecting the level of the cleaning water stored in the tank body 660, and a cleaning supplied to the tank body 660. It is comprised with the incoming water temperature sensor 630 which consists of a thermistor which detects the temperature of water.

  The tank body 660 is composed of two members: a front tank 661 that forms the front wall, both side walls, the bottom surface, and the top surface of the tank, and a rear tank 662 that forms the rear wall of the tank. Similar to the first embodiment, the overall shape of the tank body 660 is formed by a plurality of planes including a front wall, a rear wall, both side walls, a bottom surface, and a top surface, and the shape in plan view is substantially rectangular. The front wall has an inclined part that retreats from the middle, the side view shape is formed in a substantially trapezoidal shape with the upper part being thinner than the lower part, and the cross-sectional area of the upper part of the tank body 660 is smaller than the lower part. .

  A water inlet 601 is provided at the lower part of one side wall of the tank body 660, and a water outlet 602 is provided at the lower part of the rear wall of the tank body 660, and the tank body 660 communicates with the inside and outside of the tank body 660. An air opening 603 is provided. By providing the air opening 603, the air accumulated in the tank body 660 can be released to the outside, and the internal pressure of the tank body 660 can be constantly maintained at atmospheric pressure.

  Since the inside of the sub tank 650 is always maintained at atmospheric pressure, the flow path from the downstream of the sub tank 650 to the water inlet 516d of the water pump 516 is also maintained at atmospheric pressure, so that the water pump 516 is affected by fluctuations in water pressure. Therefore, a stable pump function can be exhibited.

  Inside the water inlet 601 of the tank body 660, a partition wall 663 standing from the bottom surface at a position facing the water inlet 601 and a rectifying rib 664 extending from the side wall so as to cover the partition wall 663 are formed. The rectifying unit 665 is formed.

  Wash water that has flowed in from the water inlet 601 flows into the lower portion of the rectifying unit 665, rises in the rectifying unit 665, passes through the gap between the partition wall 663 and the rectifying rib 664, and flows into the tank body 660.

During this time, even when the pressure of the wash water flowing in from the water inlet 601 is high or the flow is disturbed including a large amount of air, the flow of the wash water is rectified in the rectifying unit 665 and is stored in the tank body 660. The rectified wash water flows in and is stored. Air contained in the wash water is separated during storage, and the water level detection sensor 620 released from the atmosphere opening 603 to the outside of the tank body 660 includes a common electrode 671 serving as a common electrode, and a plurality of water level detection sensors installed for each water level. It is composed of a water level electrode 672, and is composed of one common electrode 671 and two water level electrodes 672 as in the first embodiment. Both the common electrode 671 and the water level electrode 672 are made of a stainless material.

  A common electrode 671 is disposed on the inner surface of the lower portion of the front wall of the tank body 660, and a water level electrode 672 is disposed on the inner surface of the top surface of the tank body 660. The water level electrode 672 is installed so as to hang from the top surface, the upper electrode 673 having a short electrode length and a high tip position, and a long electrode length and a low tip position. The lower limit electrode 674 is used. The common electrode 671 is installed at a position lower than the tip of the lower limit electrode 674, and the common electrode 671 is always in a flooded state in a normal use state.

  As shown in FIGS. 34 and 36, two recessed portions 667 that are recessed upward are formed on the top surface of the tank body 660 by two hanging ribs 666. When the water level in the tank main body 660 rises and rises from the lower end of the rib 666, the recessed portion 667 is sealed by the water surface 651, so that a space in which air is stored is formed, and the recessed portion is recessed even when the sub tank 650 is full. A sealed space 668 that is not immersed in the cleaning water is formed in at least a part of the portion 667.

  The upper limit electrode 673 and the lower limit electrode 674 are respectively installed on the top surface that is the highest position of the recessed portion 667, and the bases of the upper limit electrode 673 and the lower limit electrode 674 are sealed spaces 668 formed when the water level rises. Is placed inside.

  Since the upper limit electrode 673 and the lower limit electrode 674 are arranged in the sealed space 668, the bases of the upper limit electrode 673 and the lower limit electrode 674 are not always in direct contact with the washing water, and the tips of the upper limit electrode 673 and the lower limit electrode 674 are In a state separated from the water surface 651, the residual water adhering to the bases of the upper limit electrode 673 and the lower limit electrode 674 and the inner surface of the tank body 660 is reliably separated, and the residual water adhering to the inner surface of the tank body 660 is removed. An effect of preventing erroneous detection as stored water can be obtained.

  In the present embodiment, two concave portions are provided on the top surface of the tank body, and two sealed spaces are formed. The upper limit electrode and the lower limit electrode are installed in separate sealed spaces. The configuration is not limited, and one sealed space may be formed, and the upper limit electrode and the lower limit electrode may be installed in the same sealed space.

  In the present embodiment, the common electrode is installed on the front wall of the tank body, and only the two water level electrodes are installed in the sealed space on the top surface. However, the present invention is not limited to this. It is good also as the structure installed in the sealed space of the surface, and when it is set as such a structure, the misdetection by residual water can be prevented more reliably.

As described above, it is possible to improve the accuracy of the water level detection sensor of the sanitary washing device according to the present invention, and therefore, the present invention can be applied to the use of water application equipment provided with other water level detection sensors.

DESCRIPTION OF SYMBOLS 100 Sanitary washing device 130 Control part 516 Water pump 600 Subtank 620 Water level detection sensor 621 Common electrode 622 Water level electrode 630 Incoming temperature sensor 650 Subtank 671 Common electrode 672 Water level electrode 700 Heat exchanger 800 Nozzle device

Claims (2)

A nozzle device for jetting cleaning water;
A cleaning water supply channel for supplying cleaning water to the nozzle device;
A control unit,
The washing water supply channel is
A water pump for feeding cleaning water to the nozzle device;
A heat exchanger upstream of the water pump for heating the wash water;
A sub tank on the upstream side of the heat exchanger and opening a part of the washing water supply flow path to the atmosphere,
The sub tank includes a water level detection sensor and a water temperature sensor for detecting the level of cleaning water stored in the sub tank,
The water level detection sensor includes a common electrode and a plurality of water level electrodes on an inner surface of the sub tank, and the control unit applies a direct current between the common electrode and the water level electrode, and detects the water level by a change in voltage. With configuration,
The control unit includes a threshold value for determining a flooded state and a non-flooded state of the water level electrode, and corrects the threshold value by temperature detection data of the incoming water temperature sensor,
Sanitary washing device. The control unit calculates a flow rate supplied by the water pump based on detection data of the water level sensor and a capacity of the sub-tank, and when the calculated flow rate is different from a set value, Characterized by adjusting the output,
The sanitary washing device according to claim 1.

Images