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EP-3461962-B1 - SANITARY WASHING DEVICE

EP3461962B1EP 3461962 B1EP3461962 B1EP 3461962B1EP-3461962-B1

Inventors

  • MATSUDA, YASUHIRO
  • Ogawa, Munehiko
  • KAWAHARA, KANDAI
  • FUKUMOTO, HARUHIKO
  • TANII, TARO
  • NISHIE, RYOTA

Dates

Publication Date
20260506
Application Date
20180919

Claims (15)

  1. A sanitary washing device (200) for washing human private parts, comprising: a nozzle (473) configured to jet water toward the human private parts; and a protective electronic circuit (480) configured to prohibit operation of at least part of the sanitary washing device (200) when a component of the sanitary washing device fails, characterized in that : the protective electronic circuit (480) includes a failure diagnosis part (482) configured to diagnose a failure of a component of the protective electronic circuit, wherein the failure diagnosis is performed upon a command for passing water to the nozzle (473) and before starting jetting water from the nozzle, at least part of the operation related to the j etting in the sanitary washing device being prohibited when a failure of the component of the sanitary washing device is sensed by diagnosis using the failure diagnosis part (482).
  2. The device (200) according to claim 1, wherein the at least part of the operation related to the jetting includes water supply from a water supply source to the nozzle (473).
  3. The device (200) according to claim 1 or 2, wherein the at least part of the operation related to the jetting further includes blocking of supply of electric power to at least part of the sanitary washing device.
  4. The device (200) according to any one of claims 1 to 3, further comprising: a transporting part configured to transport water to the nozzle (473), wherein the at least part of the operation related to the jetting includes transport of the water to the nozzle (473) by the transporting part.
  5. The device (200) according to any one of claims 1 to 4, further comprising: a flow channel switching part configured to switch a state of supplying water to the nozzle (473) and a state of supplying water to other than the nozzle (473), wherein the at least part of the operation related to the jetting includes water supply to the nozzle (473) by the flow channel switching part.
  6. The device (200) according to any one of claims 1 to 5, further comprising: a nozzle (473) state switching part configured to switch a state of a jetting port of the nozzle (473) exposed toward the human private parts and a state of the jetting port not exposed toward the human private parts, wherein the at least part of the operation related to the jetting includes exposure of the jetting port toward the human private parts by the nozzle (473) state switching part.
  7. The device (200) according to claim 6, wherein the state of the jetting port exposed toward the human private parts is an advanced state of the nozzle (473), and the state of the jetting port not exposed toward the human private parts is a retracted state of the nozzle (473).
  8. The device (200) according to any one of claims 1 to 7, further comprising: a heating part configured to heat the water supplied to the nozzle (473), wherein the at least part of the operation related to the jetting includes heating of the water by the heating part.
  9. The device (200) according to any one of claims 1 to 7, further comprising: a water supply controlling part configured to control water supply to the nozzle (473), wherein the at least part of the operation related to the jetting includes water supply to the nozzle (473) by the water supply controlling part.
  10. The device (200) according to claim 9, further comprising: a heating part configured to heat water supplied from the water supply controlling part, wherein the protective electronic circuit includes a high-temperature jetting avoidance part (483) configured to avoid the water heated by the heating part to a temperature higher than a predetermined temperature being jetted from the nozzle (473), and water supply to the nozzle (473) by the water supply controlling part is prohibited when a failure of the high-temperature jetting avoidance part is sensed by diagnosis using the failure diagnosis part (482).
  11. The device (200) according to claim 10, further comprising: A first temperature sensor (41) configured to sense temperature of the water heated by the heating part, wherein the protective electronic circuit includes a second temperature sensor (42) provided downstream of the first temperature sensor (41) and configured to sense temperature of the water, and the high-temperature jetting avoidance part prohibits water supply to the nozzle (473) based on the temperature sensed by the second temperature sensor.
  12. The device (200) according to claim 11, wherein the high-temperature jetting avoidance part prohibits jetting by the nozzle (473) when the temperature sensed by the second temperature sensor exceeds a predetermined temperature.
  13. The device (200) according to claim 12, wherein a state in which jetting by the nozzle (473) is prohibited when the temperature sensed by the second temperature sensor exceeds the predetermined temperature is not canceled until power restart of the protective electronic circuit is performed.
  14. The device (200) according to any one of claims 1 to 13, wherein the diagnosis using the failure diagnosis part (482) is performed before starting water supply to the nozzle (473).
  15. The device (200) according to claim any one of claims 1 to 14, wherein a state in which water supply to the nozzle (473) is prohibited by the diagnosis using the failure diagnosis part (482) is canceled when the diagnosis using the failure diagnosis part (482) is performed again and no failure is sensed.

Description

FIELD Embodiments described herein relate generally to a sanitary washing device comprising a semiconductor device. BACKGROUND There is known a sanitary washing device for jetting the water (warm water) heated by e.g. a heating part toward the human private parts. Jetting heated water suppresses causing the user to feel discomfort from cool water and can improve usability. On the other hand, in order not to cause discomfort to the user and to prevent a scald during jetting, it is desired not to jet excessively heated high-temperature water. However, high-temperature water may be jetted when a failure occurs in some components of the sanitary washing device, particularly in components of the washing system (such as members and devices related to jetting from the nozzle). For instance, when a failure (primary failure) occurs in the heating part or the element for controlling energization of the heating part, water may be unintentionally and excessively heated to result in jetting high-temperature water. The sanitary washing device may be provided with a protective electronic circuit for preventing jetting of high-temperature water. The protective electronic circuit includes e.g. a temperature sensor such as a thermistor for measuring the temperature of the water heated by the heating part. When the measured temperature is high temperature, the protective electronic circuit closes the flow channel and stops jetting. However, a multiple failure may occur in which a failure (secondary failure) occurs in components of the protective electronic circuit in addition to e.g. the aforementioned primary failure. High-temperature water may be jetted also in this case. EP 0 989 246 A1, US 4370 764 A, JP H07 197508 A and EP 1 669 688 A1 disclose a cleaning device using fluid heating device in which a failure is diagnosed based on the temperature of the water. SUMMARY According to the invention, a sanitary washing device for washing human private parts includes a nozzle configured to jet water toward the human private parts, and a protective electronic circuit configured to prohibit operation of at least part of the sanitary washing device when a component of the sanitary washing device fails. The protective electronic circuit includes a failure diagnosis part configured to diagnose a failure of a component of the protective electronic circuit, wherein the failure diagnosis is performed upon a command for passing water to the nozzle. Before starting jetting water from the nozzle, at least part of the operation related to the jetting in the sanitary washing device is prohibited when a failure of the component of the sanitary washing device is sensed by diagnosis using the failure diagnosis part. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a toilet device provided with a sanitary washing device according to an embodiment;FIG. 2 is a block diagram illustrating a configuration of the sanitary washing device according to the embodiment;FIG. 3 is a block diagram illustrating the configuration of the sanitary washing device according to the embodiment;FIG. 4 is a block diagram illustrating an alternative configuration of the sanitary washing device according to the embodiment;FIG. 5 is a block diagram illustrating an alternative configuration of the sanitary washing device according to the embodiment;FIGS. 6 and 7 are flow charts illustrating an operation of the sanitary washing device according to the embodiment;FIG. 8 is a block diagram illustrating part of the protective electronic circuit of the sanitary washing device according to the embodiment;FIG. 9 is a block diagram illustrating part of the protective electronic circuit of the sanitary washing device according to the embodiment;FIG. 10 is a block diagram illustrating an alternative configuration of the sanitary washing device according to the embodiment;FIG. 11 is a block diagram illustrating part of the protective electronic circuit of the sanitary washing device according to the embodiment;FIG. 12 is a flow chart illustrating the operation of the sanitary washing device according to the embodiment;FIGS. 13 and 14 are flow charts illustrating an alternative operation of the sanitary washing device according to the embodiment;FIG. 15 is a block diagram showing an alternative example of the protective electronic circuit of the sanitary washing device according to the embodiment;FIG. 16 is a block diagram illustrating an alternative example of the protective electronic circuit of the sanitary washing device according to the embodiment;FIGS. 17A to 17E are graphs illustrating the operation of the sanitary washing device according to the embodiment;FIGS. 18 and 19 are flow charts illustrating an alternative operation of the sanitary washing device according to the embodiment;FIG. 20 is a block diagram showing an alternative example of the protective electronic circuit of the sanitary washing device according to the embodiment;FIG. 21 is a block diag