EP3272259A1 - Sanitäre vorrichtung und verfahren zur steuerung einer von einer leistungseinheit bereitgestellten betriebsleistung einer sanitären vorrichtung - Google Patents

Sanitäre vorrichtung und verfahren zur steuerung einer von einer leistungseinheit bereitgestellten betriebsleistung einer sanitären vorrichtung Download PDF

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Publication number
EP3272259A1
EP3272259A1 EP16180786.2A EP16180786A EP3272259A1 EP 3272259 A1 EP3272259 A1 EP 3272259A1 EP 16180786 A EP16180786 A EP 16180786A EP 3272259 A1 EP3272259 A1 EP 3272259A1
Authority
EP
European Patent Office
Prior art keywords
unit
power
heating element
sanitary device
seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16180786.2A
Other languages
English (en)
French (fr)
Inventor
Yan Zhengxue
Lu Chaobo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duravit AG
Original Assignee
Duravit AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duravit AG filed Critical Duravit AG
Priority to EP16180786.2A priority Critical patent/EP3272259A1/de
Priority to CN201710496248.5A priority patent/CN107638122A/zh
Publication of EP3272259A1 publication Critical patent/EP3272259A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K13/00—Seats or covers for all kinds of closets
    • A47K13/24—Parts or details not covered in, or of interest apart from, groups A47K13/02 - A47K13/22, e.g. devices imparting a swinging or vibrating motion to the seats
    • A47K13/30—Seats having provisions for heating, deodorising or the like, e.g. ventilating, noise-damping or cleaning devices
    • A47K13/305—Seats with heating devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/029—Heaters specially adapted for seat warmers

Definitions

  • the invention relates to sanitary device, comprising a ring- or U-shaped seat, an electric heating element arranged at or within the seat, a power unit adapted to provide an operation power to the heating element and a control unit adapted to control the operation power.
  • Heatable seats are an important comfort feature of modern sanitary devices, frequently called electric toilets or electric bidets.
  • An electric heating element may be arranged at or within the seat and obtain electric operation power by a power unit.
  • a control unit controls the power applied to the heating element.
  • Conventional sanitary devices comprise a temperature sensor adapted to provide a temperature measuring signal to the control unit which controls the power unit depending on this signal.
  • the temperature sensor is arranged inside the seat requiring respective space within the seat. Thus, those temperature sensors suffer from their large dimensions rendering a further reduction of the thickness of the seat difficult.
  • a sanitary device at initially described, whereby a resistor is connected or connectable in series to the heating element, whereby the control unit is adapted to measure a voltage on a measuring point between the resistor and the heating element in a connected state and to control the operation power depending on the measured voltage.
  • the invention bases on the consideration to renounce a dedicated temperature sensor by obtaining an information relating to the seat temperature from the resistance of the heating element. Its resistivity may be assumed as linear increasing at least within a typical range of operation temperature, e.g. between +20 °C and +40 °C.
  • connecting a resistor of known resistance in series to the heating element permits deriving the heating element's resistance by measuring the voltage on the measuring point between the heating element and the resistor in its connected state. The voltage may be measured while the power unit provides a known operating voltage and/or current to the heating element. Consequently, the operation power of the heating element provided by the power unit may be controlled depending on the measured voltage indicating the seat temperature.
  • the resistor used for the inventive sanitary does not need to be thermally connected to the seat or the heating element, installation space within the seat can be saved allowing a reduction of the thickness of the seat, advantageously.
  • the ring-shaped seat may be considered as O-shaped, as well, meaning that the seat surrounds an opening for a person to sit on completely, whereas the U-shaped seat does not surround an opening completely.
  • a typical inventive sanitary device may also comprise a bowl, especially made of ceramics, to which the seat is attached.
  • the bowl may additionally comprise a flushing unit connectable to a water supply and/or a drain connectable to a sewer system or tank.
  • the seat may be adapted for a person sitting on it.
  • the sanitary device may be adapted as toilet and/or for washing parts of the human body (bidet).
  • a lid may be attached to the seat or the bowl.
  • inventive sanitary device may comprise a spraying unit adapted to spray a liquid on the human body and/or a blowing unit adapted to blow, particularly warmed, air on the human body and/or a moving unit adapted to move the lid and/or a deodorization unit.
  • a switching unit is connected within a circuit comprising the power unit and the heating element and controlled by the control unit.
  • the switching unit may comprise two switching elements, e.g. transistors, whereby a first switching element is adapted to allow the current to flow through the heating element and the resistor and a second switching element is adapted to allow the current to flow through the heating element without flowing through the resistor.
  • the switching unit may be adapted to connect the resistor in series with the heating unit to perform a measurement of the voltage on the measuring point.
  • the control unit may be adapted to connect the resistor in series with the heating unit when a measurement on the measuring point is performed. Hence, the current flows through the resistor only when it is necessary to measure the voltage avoiding a power consumption by the resistor when no measurement is performed.
  • the first switching element in a first switching state the first switching element may be open, e.g. the first transistor blocks the current, and the second switching element may be closed, e.g. the second transistor is conducting.
  • the first switching element in a second switching state the first switching element may be closed, the first transistor is conducting, and the second switching element may be open, the second transistor blocks the current.
  • the switching unit is adapted to open or close the circuit to control the operation power.
  • both switching elements may be open, e.g. both transistors block the current, to prohibit the current to flow through the heating element.
  • the second switching element may be opened or closed temporarily, e.g. for defining a pulse-width-modulation (PWM) with a duty cycle to heat the seat.
  • PWM pulse-width-modulation
  • the switching unit may allow a current to flow through the heating element if the measured voltage indicates, that the seat temperature is below a lower threshold. Accordingly, the switching unit may prohibit the current to flow through the heating element if the measured voltage exceeds an upper threshold.
  • the control unit may be adapted to control the operation power by switching a power line between the power unit and the heating element and/or by activating and deactivating the power unit.
  • the power unit is activated or the switch, e.g. a relay, is closed if the measured voltage indicating, the seat temperature is below the lower threshold. Accordingly, the power unit may be deactivated or the switch may be opened if the measured voltage exceeds the upper threshold.
  • the control unit is adapted to control the power unit by setting a voltage and/or a current provided by the power unit. In this case the control unit may choose the set voltage and/or the set current such that the measured voltage remains near a predetermined value.
  • control unit is adapted to control the operation power depending on a difference value between the measured voltage or a parameter derived from the measured voltage and a predetermined reference value.
  • the difference value may be considered as error signal of a negative feedback control systems, having the power provided by the power unit as system input. This way, the power unit may be controlled very precisely to provide a comfortable seat temperature by the heating element.
  • an ambient temperature sensor is adapted to provide an ambient temperature signal, whereby the control unit is adapted to control the operation power depending on the ambient temperature signal, additionally.
  • the seat temperature may be set higher or lower with regard to the ambient temperature.
  • the ambient temperature sensor comprises an NTC (negative temperature coefficient) element.
  • the lower threshold and/or the upper threshold and/or the reference value may be set depending on the ambient temperature signal.
  • control unit is adapted to detect a malfunction of at least one component connected or connectable to the power unit and to switch a power line connected to the power unit if a malfunction is detected.
  • the at least one component may be the heating element and/or the switching unit, particularly one of its switching elements.
  • the malfunction may be a short circuit.
  • the malfunction may be detected by measuring the voltage on the measuring point. E.g. in a normal operation state the voltage is within a predetermined range. It exceeds the range when a short circuit of the heating element or the switching unit occurs.
  • the power unit and/or the control unit and/or the resistor are disposed outside the seat.
  • Each of the aforementioned components may be arranged at the seat or, more preferably, separately from the seat allowing the realization of a very thin seat which has merely the heating element arranged inside.
  • a service device is arranged separately from the seat and incorporating the power unit and/or the control unit and/or resistor in a housing. Providing the service device allows the seat to be of reduced thickness over its entire dimensions.
  • the service device and the seat may each comprise a connector to provide a connection between them.
  • the seat has a thickness of at most 10 mm, preferably at most 7 mm, more preferably at most 5 mm, with a minimum thickness of 3 mm.
  • the invention relates to a method for controlling an operation power provided by a power unit of a sanitary device, whereby the power unit provides the operation power to a heating element arranged at or within a ring- or U-shaped seat of the sanitary device.
  • the inventive method is characterized in measuring a voltage on a measuring point between the heating element and a resistor connected in series to the heating element and controlling the operation power depending on the measured value.
  • a switching unit connected within a circuit comprising the power unit and the heating element and controlled by the control unit connects the resistor in series with the heating unit to perform a measurement of the voltage on the measuring point and/or opens or closes the circuit to control the operation power.
  • the operation power is controlled by switching a power line between the power unit and the heating element and/or by activating and deactivating the power unit and/or setting a voltage and/or a current provided by the power unit.
  • the operation power unit is controlled depending on a difference value between the measured voltage or a parameter derived from the measured voltage and a predetermined reference value.
  • the operation power is controlled depending on an ambient temperature signal provided by an ambient temperature sensor, additionally.
  • a power line connected to the power unit is switched if a malfunction of at least one component connected or connectable to the power unit is detected.
  • inventive sanitary device may apply analogously to the inventive method, so that advantages achieved by the inventive sanitary device may be achieved by the inventive method, too.
  • Fig. 1 shows a perspective view on a sanitary device 1, comprising a ring-shaped, heatable seat 2 which is arranged on a bowl 3.
  • the seat may be U-shaped.
  • a lid 4 is attached pivotly to the seat 2 to cover it in a closed position and to allow a person to sit on the seat 2 in an opened position.
  • the bowl 3 is connected to a sewer system and has a cistern 5 with an operating element 6 to initiate flushing the bowl 3.
  • a service device 7 is arranged separately from the seat 2 and comprises a housing in which a power unit 8 adapted to provide an operation power via a connector 9 to a heating element 10 arranged within the seat 2, a resistor 11 connectable in series with the heating element 10 via a switching unit 12 and a control unit 13 adapted to control the power unit 8 and the switching unit 12 are incorporated.
  • the sanitary device 1 comprises a spraying unit adapted to spray a liquid on the human body, a blowing unit adapted to blow warmed air on the human body, a moving unit adapted to move the lid 4 and a deodorization unit. Note, that this enumeration is not exhaustive. Those units, which are not shown in fig. 1 in detail, may be controlled by the control unit 13, as well.
  • Fig. 2 shows a top view on the seat 2, comprising a connector 14 adapted to fit to the connector 9 of the service device 7 and to connect the power unit 8 to the coil-like heating element 10.
  • the heating element 10 may be molded in seat, arranged sandwich-like between two parts of the seat 2 or arranged on a bowl-side surface of the seat 2.
  • the seat 2 is made of a plastic material, e.g. polypropylene, acrylnitril-butadien-styrol, urea-formaldehyde resin, a composite material, wood or combinations thereof. Note, that this enumeration is not exhaustive.
  • the seat 2 Since no further components have to be integrated into the seat 2 besides the heating element 10 and the connector 14, the seat 2 has a very low thickness of 10 mm or even only 5 mm. This is achieved by avoiding an additional temperature sensor arranged within conventional seats and by determining an information relating to the seat temperature out of the resistance of the heating element 10.
  • Fig. 3 shows a block diagram of the sanitary device 1.
  • the power unit 8 is adapted to provide an operation power via a power line 15 and the connectors 9, 14 to the heating element 10.
  • a relay 16 is placed within the power line 15, whereby the control unit 13 is adapted to switch the relay 16 to an open state when the control unit 13 detects a malfunction, e.g. a short circuit, of the heating element 10 or the switching unit 12. In a normal operation state of the sanitary device 1 the relay 16 is closed.
  • the switching unit 12 is also controlled by the control unit 13 and comprises two switching elements, e.g. a first transistor 17 and a second transistor 18. If the first transistor 17 blocks and the second transistor 18 is conducts, current provided by the power unit 8 will flow through the heating element 10 to ground in the closed state of the relay 16, thus heating the seat 2. In this state of the switching unit 12 a measuring point 19 being connected with an A/D-converter input 20 of the control unit 13 is connected to ground. By contrast, if the transistor 17 conducts and the second transistor 18 blocks, the current will flow through the resistor 11 to ground, whereby a voltage to be measured on the measuring point 19 drops over the resistor 11.
  • two switching elements e.g. a first transistor 17 and a second transistor 18.
  • Fig. 4 shows a diagram of the resistance R 1 of the heating element 10 against its temperature T in detail.
  • the resistance R 1 rises nearly constantly with rising temperature T, so that the measured voltage U m on the measuring point 19 can be assumed to be proportional to the temperature T.
  • temperature coefficients of higher order may be omitted.
  • the resistor 11 is disposed outside the seat 2 inside the service device 7. Hence, heating of the seat 2 has only very few or practically no influence on the resistance R 2 of the resistor 11, what might distort the measured voltage U m otherwise.
  • the control unit 13 controls the switching unit 12 to set the first transistor 17 to its conducting state, allowing a current to flow through the heating element 10 and the resistor 11, and the second transistor 18 to its blocking state in order to provide a measurement of the voltage U m dropping over the resistor 11. Then, the control unit 13 controls the operation power provided by the power unit 8 depending on the voltage U m measured on the measuring point 19. If the voltage U m is below a lower threshold, indicating the need for heating the seat 2 the control unit 13 blocks the first transistor 17, prohibiting a current to flow through the resistor 11, and controls the second transistor 18 to be conductive, allowing a current to flow from the heating element 10 to ground directly.
  • the second transistor 18 may be switched on or off according to a predetermined on/off-time, e.g. a duty cycle of a pulse-width-modulation. Otherwise, if the voltage U m exceeds an upper threshold indicating, that the seat to has been heated to a predetermined temperature, both transistors 17, 18 are controlled to block a current flowing through the heating element 10. The steps may be repeated regularly allowing to control the seat temperature continuously.
  • a predetermined on/off-time e.g. a duty cycle of a pulse-width-modulation.
  • the control unit 13 detects if a malfunction, e.g. a short circuit of the heating element 10 or of the first transistor 17 and the second transistor 18, occurs. Such a malfunction may be detected if the voltage U m exceeds a predetermined range, defined by further upper and lower thresholds. If the voltage U m drops below the further lower threshold a short circuit of the transistors 17, 18 may be detected. If the U m exceeds the further upper threshold, a short circuit of the heating element 10 may be detected while current flows through the resistor 11. If a malfunction is detected, the control unit 13 switches the power line 15 by opening relay 16 in order to prevent a damage of the sanitary device 1. According to another embodiment, to control the operation power the control unit 13 switches the power line 15 by opening and closing relay 16 instead of or additionally to controlling second transistor 18.
  • a malfunction e.g. a short circuit of the heating element 10 or of the first transistor 17 and the second transistor 18.
  • the relay 16 is closed all the time. Instead of switching the relay 16 to its closed are open state, the control unit 13 activates or deactivates the power unit 8 directly.
  • the relay 16 is closed continuously, whereby the control unit 13 controls the power unit depending on a difference value between the measured voltage or a value derived from the measured voltage and a predetermined reference value. Therefore, the voltage and the current supplied by the power unit 8 are changed continuously by the control unit 13, which realizes a negative feedback control system having the operation power as system input.
  • the control strategies realized by the aforementioned embodiments may also be combinated.
  • the upper and the lower thresholds and/or the reference value are fixed, saved within a memory of the control unit 13. According to another embodiment, the upper and the lower threshold and/or the reference value are derived from a temperature value or a temperature level basing on a user input, e.g. obtained by an input device of the sanitary device 1.
  • control unit 13 is connected to an ambient temperature sensor 21, e.g. comprising an NTC (negative temperature coefficient) element, sensing an ambient temperature of the sanitary device 1.
  • the control unit 13 is adapted to control the operation power provided by the power unit 8 depending on the ambient temperature signal of the temperature sensor 21, additionally. Therefore, the control unit 13 may choose the upper and/or the lower threshold and/or the reference value depending on the ambient temperature signal.
  • the sanitary device 1 is a bidet, allowing a person sitting on the seat 2 to wash his body.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Toilet Supplies (AREA)
  • Control Of Resistance Heating (AREA)
EP16180786.2A 2016-07-22 2016-07-22 Sanitäre vorrichtung und verfahren zur steuerung einer von einer leistungseinheit bereitgestellten betriebsleistung einer sanitären vorrichtung Withdrawn EP3272259A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16180786.2A EP3272259A1 (de) 2016-07-22 2016-07-22 Sanitäre vorrichtung und verfahren zur steuerung einer von einer leistungseinheit bereitgestellten betriebsleistung einer sanitären vorrichtung
CN201710496248.5A CN107638122A (zh) 2016-07-22 2017-06-26 卫生设备和用于控制由卫生设备的电力单元所提供的操作电力的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16180786.2A EP3272259A1 (de) 2016-07-22 2016-07-22 Sanitäre vorrichtung und verfahren zur steuerung einer von einer leistungseinheit bereitgestellten betriebsleistung einer sanitären vorrichtung

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EP3272259A1 true EP3272259A1 (de) 2018-01-24

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EP16180786.2A Withdrawn EP3272259A1 (de) 2016-07-22 2016-07-22 Sanitäre vorrichtung und verfahren zur steuerung einer von einer leistungseinheit bereitgestellten betriebsleistung einer sanitären vorrichtung

Country Status (2)

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EP (1) EP3272259A1 (de)
CN (1) CN107638122A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3444094A1 (de) * 2017-08-18 2019-02-20 Xiamen Moext Intelligent Technology Co., Ltd. Toilettensitz und herstellungsverfahren dafür
WO2021133324A1 (en) * 2019-12-24 2021-07-01 Eczacibasi Yapi Gerecleri Sanayi Ve Ticaret Anonim Sirketi Toilet seat with heating feature
EP4195873A1 (de) * 2021-12-07 2023-06-14 Shanghai Kohler Electronics, Ltd. Selbstadaptionsverfahren für heizsitzringspannung, elektronische vorrichtung und speichermedium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001104218A (ja) * 1999-10-05 2001-04-17 Inax Corp 暖房便座
US20010008236A1 (en) * 2000-01-13 2001-07-19 John Allard Safety circuit for heating devices using ptc wire
JP2005110837A (ja) * 2003-10-06 2005-04-28 Matsushita Electric Ind Co Ltd 暖房便座
WO2005053360A2 (en) * 2003-11-21 2005-06-09 Watlow Electric Manufacturing Company Two-wire layered heater system
JP2012235945A (ja) * 2011-05-13 2012-12-06 Lixil Corp 暖房便座
US20130315282A1 (en) * 2011-02-16 2013-11-28 Audi Ag Circuit arrangement for an electric seat heating means

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060076343A1 (en) * 2004-10-13 2006-04-13 Cheng-Ping Lin Film heating element having automatic temperature control function
KR20140108377A (ko) * 2013-02-25 2014-09-11 주식회사 콜러노비타 온수세정기의 난방변좌
CN205249505U (zh) * 2015-12-26 2016-05-18 东莞市冠顺实业有限公司 一种马桶盖座圈用加热器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001104218A (ja) * 1999-10-05 2001-04-17 Inax Corp 暖房便座
US20010008236A1 (en) * 2000-01-13 2001-07-19 John Allard Safety circuit for heating devices using ptc wire
JP2005110837A (ja) * 2003-10-06 2005-04-28 Matsushita Electric Ind Co Ltd 暖房便座
WO2005053360A2 (en) * 2003-11-21 2005-06-09 Watlow Electric Manufacturing Company Two-wire layered heater system
US20130315282A1 (en) * 2011-02-16 2013-11-28 Audi Ag Circuit arrangement for an electric seat heating means
JP2012235945A (ja) * 2011-05-13 2012-12-06 Lixil Corp 暖房便座

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3444094A1 (de) * 2017-08-18 2019-02-20 Xiamen Moext Intelligent Technology Co., Ltd. Toilettensitz und herstellungsverfahren dafür
WO2021133324A1 (en) * 2019-12-24 2021-07-01 Eczacibasi Yapi Gerecleri Sanayi Ve Ticaret Anonim Sirketi Toilet seat with heating feature
EP4195873A1 (de) * 2021-12-07 2023-06-14 Shanghai Kohler Electronics, Ltd. Selbstadaptionsverfahren für heizsitzringspannung, elektronische vorrichtung und speichermedium

Also Published As

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