EP0948015A2 - Machine électro-domestique, en particulier chauffe-liquide instantané - Google Patents

Machine électro-domestique, en particulier chauffe-liquide instantané Download PDF

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Publication number
EP0948015A2
EP0948015A2 EP99105888A EP99105888A EP0948015A2 EP 0948015 A2 EP0948015 A2 EP 0948015A2 EP 99105888 A EP99105888 A EP 99105888A EP 99105888 A EP99105888 A EP 99105888A EP 0948015 A2 EP0948015 A2 EP 0948015A2
Authority
EP
European Patent Office
Prior art keywords
controller
circuit
household appliance
appliance according
relay
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Withdrawn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
EP99105888A
Other languages
German (de)
English (en)
Other versions
EP0948015A3 (fr
Inventor
Karl-Heinz Hemmerich
Thomas Lorenz
Paul Schneider-Hohendorf
Werner Wenzel
Jörg Zill
Eugen Dinkel
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.)
Forbach GmbH and Co KG
Original Assignee
Forbach GmbH and Co KG
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 Forbach GmbH and Co KG filed Critical Forbach GmbH and Co KG
Publication of EP0948015A2 publication Critical patent/EP0948015A2/fr
Publication of EP0948015A3 publication Critical patent/EP0948015A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2028—Continuous-flow heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/174—Supplying heated water with desired temperature or desired range of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/407—Control of fluid heaters characterised by the type of controllers using electrical switching, e.g. TRIAC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits

Definitions

  • the invention relates to an electrical household appliance, in particular an electric instantaneous water heater, with a Power supply and a safety switch to disconnect the device from the power supply.
  • a safety device equip which includes a safety switch and with this the power supply to the Device interrupts. This is achieved, for example, by that an electromagnet is activated in the event of a fault, which in turn actuates the safety switch.
  • the temperature monitor is designed so that at an impermissibly high temperature, for example due to a missing or deficient water supply at the same time closed circuit breaker what an electrical Instantaneous water heater represents a serious error, the contact closes and thus the coil of the electromagnet to the mains voltage or one generated in the device Supply voltage is connected.
  • German Offenlegungsschrift 41 42 838 which the goal is an impermissibly high pressure rise or a to avoid considerable excess temperature in the event of a fault and proposes a security device that fails ensures operational shutdown of the energy supply and quickly recognizes and switches off quickly in the event of danger leads. This is mainly achieved by that the water throughput and energy supply are evaluated is, with an obvious disproportion in the event of an error the safety switch is triggered.
  • German patent 44 01 670 specified, the task being solved here as well an arrangement for controlling the heating energy supply the heating coils of an electric instantaneous water heater to improve in that the number of moving and power components susceptible to faults are thus reduced and the reliability of the heating energy interruption accordingly is increased.
  • the connection is one operational switch with a safety switch provided, the operational switch the heating energy depending on a flow and controls the safety switch the supply of heating energy only stops if there is an electrical potential on the heating coils is scanned while the water flow one falls below the specified safety-related minimum value.
  • Safety switch is triggered in the event of an error to separate the heating coils from the supply network.
  • This not only ensures that the device about suitable means for disconnecting from the power supply but also has a mechanism the cyclical functioning of all of these agents checked. This mechanism also separates the device functional state of the power supply when a safety-relevant component is defective, the defect however, only later with a certain corresponding one Operating status does not have to be switched off of the device from the power supply.
  • a Check the release chains in the device by means of a test Falling of the relay can be checked without this electrical during stand-by operation of the device Power to the main consumer using the circuit breakers must be switched through.
  • a controller is expediently provided which switches the relay as a test and at the same time ensures that none of the circuit breakers have the potential is switched through.
  • the device is safety-related is equipped anyway that in the case of a defective, for example blown circuit breaker the relay drops out and the safety switch triggers.
  • the test switching of the relay by cyclical switching off of a transistor during stand-by operation performed, with a series connection of one Phase monitoring circuit, the driver coil of the electromagnet and the normally closed contact of the relay connected to a main consumer one-sided potential from a circuit breaker monitoring device can be queried.
  • the driver coil of the electromagnet and the normally closed contact of the relay connected to a main consumer one-sided potential from a circuit breaker monitoring device can be queried.
  • the one-sided contact with the main consumer Potential from the circuit breaker monitoring device can be queried and from this to the Controller can be passed on for further evaluation.
  • the controller is two of each other independent monoflops with downstream Assigned transistor, the transistors by means of associated monoflops cyclically one after the other, however cannot be switched off at the same time. It is by means of of the two monoflops possible, the controller redundantly Monitor functionality.
  • controller has both monoflops monitored for functionality.
  • Embodiments of the invention are based on a Drawing explained in more detail.
  • the drawing shows a Function block diagram of an electric instantaneous water heater DE.
  • the electrical instantaneous water heater DE is on the power side to a power supply SV with three phases L1, L2, L3 connected.
  • the three phases are L1, L2, L3 via a load disconnector LT, which is part of a safety switch SS is, right on the triacs Circuit breakers LS connected.
  • the electrical power is direct fed to a heating block HB, in which incoming cold Water to a preset by a machine operator Temperature is heated.
  • the one described above Current path represents the load circuit of the electric instantaneous water heater DE represents.
  • the actual temperature control and sensor circuit comprises a connection to the control of the circuit breakers LS that originates from a controller C that is part of an electronic circuit board EP.
  • the controller C receives the signals from two temperature sensors S1 and S2 and from a flow sensor V D as control variables.
  • the controller C regulates the temperature of the water emerging from the heating block HB to the target temperature TS specified by the device operator.
  • the electrical power drawn from the voltage supply network SV is transmitted to the heating block HB by the controller C switching through the triacs operating as semiconductor valves.
  • the electrical continuous flow heater DE has a sensor circuit as a third circuit via a safety circuit, of its electrical power via a phase monitoring circuit PH takes from the power supply network EV.
  • a phase monitoring circuit PH Diode matrix not shown here provided by means of which the three phases L1, L2, L3 on a common Point.
  • the last circle to be explained is a so-called Trigger chain identifiable safety control circuit.
  • the main characteristics are in this circle embodies the present invention. Belong to this circle the connection from the phase monitoring PH to the controller C and the connection of a circuit breaker monitoring device LE to controller C, the circuit breaker monitoring device LE their signal in Load circuit between circuit breaker LS and heating block HB taps.
  • This also includes two monoflops MF1, MF2 which are bidirectionally connected to the controller C and each with its own downstream transistors T1 and T2 feature.
  • a third transistor T3 next to the controller C is a third transistor T3 connected, the three transistors T1, T2, T3 between ground and one not described here Coil of the relay R connected to an operating voltage UB are.
  • Controller C basically uses transistor T3 to trigger the safety switch. It is by the Blocking the transistor T3 the coil of the relay R is de-energized, whereby this switches and thus mains voltage is applied to the driver coil of the electromagnet EM as soon as one or more of the triacs electrical power switched through to have.
  • An inherent defect of the transistor T3 leads of course bring about the above-mentioned effect, since the coil of the relay R can also be optionally switched through the transistors T1 and T2 are switched off can.
  • the trigger chain is monitored somewhat differently on functionality during stand-by operation of the electric instantaneous water heater DE.
  • the controller C can be checked redundantly for functionality. Detects at least one of the two monoflops MF1, MF2 an error of the controller C, then at least one of the two transistors T1 and T2 blocked. With the next switching electrical power through the circuit breaker LS on the heating block automatically becomes the safety switch SS triggered.
  • the Controllers can check the monoflops MF1, MF2 for functionality check.
  • the next step will be now cyclically, but not together the transistors T1, T2 or T3 switched off so that the relay drops out, ie the NC contact closes and now based on plausibility queries the functionality of the phase monitoring PH, the Circuit breaker LS and the circuit breaker monitoring device LE can be checked.
  • Defects Triacs, d. H. alloyed triacs are based on the from the phase monitoring PH and the circuit breaker monitoring device LE coming signals in the controller C detected.
  • a defective phase monitoring PH is based on the signal the circuit breaker monitoring device LE and based the switching state of the circuit breaker LS detected.
  • the circuit breaker monitoring device intervenes their input signal on the output side of the heating block HB.
  • the temperature control and sensor circuit using the controller C sure that the circuit breaker LS, provided that their proper function the one attached to them Supply voltage depending on phase L1, L2 or L3 do not connect to the heating block HB, which is otherwise to an unwanted triggering of the safety switch SS due to the closed break contact of relay R. would.
  • This not only ensures that the device about suitable means for disconnecting from the power supply but also has a mechanism the cyclical functioning of all of these agents checked. This mechanism also separates the device functional state of the power supply SV, if a safety-relevant component is defective, its Defect, however, only later with a certain corresponding one Operating status does not have to be switched off of the device from the power supply.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Resistance Heating (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Safety Devices In Control Systems (AREA)
EP99105888A 1998-03-31 1999-03-24 Machine électro-domestique, en particulier chauffe-liquide instantané Withdrawn EP0948015A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19814302 1998-03-31
DE19814302A DE19814302A1 (de) 1998-03-31 1998-03-31 Elektro-Hausgerät, insbesondere elektrischer Durchlauferhitzer

Publications (2)

Publication Number Publication Date
EP0948015A2 true EP0948015A2 (fr) 1999-10-06
EP0948015A3 EP0948015A3 (fr) 2000-09-20

Family

ID=7863046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99105888A Withdrawn EP0948015A3 (fr) 1998-03-31 1999-03-24 Machine électro-domestique, en particulier chauffe-liquide instantané

Country Status (2)

Country Link
EP (1) EP0948015A3 (fr)
DE (1) DE19814302A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016345C2 (nl) * 2000-10-06 2002-04-10 Nedap Nv Elektronisch systeem voor het waarborgen van de veiligheid van elektronisch gestuurde apparaten.
WO2006099935A1 (fr) * 2005-03-22 2006-09-28 Pilz Gmbh & Co. Kg Dispositif de coupure de securite servant a deconnecter un recepteur electrique de maniere sure
EP2489949A1 (fr) * 2011-02-21 2012-08-22 Gerdes OHG Chauffe-eau instantané à fil nu doté d'un dispositif de chauffage à fil nu commutable au niveau de tous les pôles
EP3037741A1 (fr) * 2014-12-23 2016-06-29 Vaillant GmbH Procédé destiné à éviter le fonctionnement sans eau de chauffe-eau instantané
EP3065011A1 (fr) * 2015-03-03 2016-09-07 BSH Hausgeräte GmbH Module de sécurité pour un dispositif électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012200570A1 (de) * 2012-01-16 2013-07-18 Webasto Ag Elektrische Heizung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142838A1 (de) 1991-01-03 1992-07-09 Vaillant Joh Gmbh & Co Sicherheitseinrichtung
DE4334162A1 (de) 1992-10-02 1994-04-07 Vaillant Joh Gmbh & Co Wasser-Durchlauferhitzer
DE4401670A1 (de) 1994-01-21 1995-08-17 Kulmbacher Klimageraete Anordnung zum Steuern der Heizenergiezufuhr zu den Heizwicklungen eines elektrischen Durchlauferhitzers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4103373C2 (de) * 1991-02-05 1994-06-16 Stiebel Eltron Gmbh & Co Kg Durchlauferhitzer
DE4416798A1 (de) * 1994-05-07 1995-11-16 Clage Gmbh Steuer- und Sicherheitseinrichtung für einen Durchlauferhitzer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142838A1 (de) 1991-01-03 1992-07-09 Vaillant Joh Gmbh & Co Sicherheitseinrichtung
DE4334162A1 (de) 1992-10-02 1994-04-07 Vaillant Joh Gmbh & Co Wasser-Durchlauferhitzer
DE4401670A1 (de) 1994-01-21 1995-08-17 Kulmbacher Klimageraete Anordnung zum Steuern der Heizenergiezufuhr zu den Heizwicklungen eines elektrischen Durchlauferhitzers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016345C2 (nl) * 2000-10-06 2002-04-10 Nedap Nv Elektronisch systeem voor het waarborgen van de veiligheid van elektronisch gestuurde apparaten.
WO2006099935A1 (fr) * 2005-03-22 2006-09-28 Pilz Gmbh & Co. Kg Dispositif de coupure de securite servant a deconnecter un recepteur electrique de maniere sure
US7439639B2 (en) 2005-03-22 2008-10-21 Pilz Gmbh & Co. Kg Safety switching apparatus for safe disconnection of an electrical load
EP2489949A1 (fr) * 2011-02-21 2012-08-22 Gerdes OHG Chauffe-eau instantané à fil nu doté d'un dispositif de chauffage à fil nu commutable au niveau de tous les pôles
EP3037741A1 (fr) * 2014-12-23 2016-06-29 Vaillant GmbH Procédé destiné à éviter le fonctionnement sans eau de chauffe-eau instantané
EP3065011A1 (fr) * 2015-03-03 2016-09-07 BSH Hausgeräte GmbH Module de sécurité pour un dispositif électrique

Also Published As

Publication number Publication date
DE19814302A1 (de) 1999-10-07
EP0948015A3 (fr) 2000-09-20

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