EP0073717B1 - Chaudière à gaz étanche à tirage forcé avec régulation par microprocesseur - Google Patents

Chaudière à gaz étanche à tirage forcé avec régulation par microprocesseur Download PDF

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Publication number
EP0073717B1
EP0073717B1 EP82401584A EP82401584A EP0073717B1 EP 0073717 B1 EP0073717 B1 EP 0073717B1 EP 82401584 A EP82401584 A EP 82401584A EP 82401584 A EP82401584 A EP 82401584A EP 0073717 B1 EP0073717 B1 EP 0073717B1
Authority
EP
European Patent Office
Prior art keywords
microprocessor
burner
water
control
gas
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.)
Expired
Application number
EP82401584A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0073717A1 (fr
Inventor
Franck Boulle
Michel Zveguintzoff
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9261717&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0073717(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Priority to AT82401584T priority Critical patent/ATE20381T1/de
Publication of EP0073717A1 publication Critical patent/EP0073717A1/fr
Application granted granted Critical
Publication of EP0073717B1 publication Critical patent/EP0073717B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/06—Regulating fuel supply conjointly with draught
    • F23N1/062—Regulating fuel supply conjointly with draught using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/10—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught
    • F23N1/102—Regulating fuel supply conjointly with another medium, e.g. boiler water and with air supply or draught using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N2005/181—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/06—Sampling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/08—Microprocessor; Microcomputer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/14—Ambient temperature around burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/19—Measuring temperature outlet temperature water heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/06—Postpurge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/20—Calibrating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/28—Ignition circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/02—Ventilators in stacks
    • F23N2233/04—Ventilators in stacks with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2239/00—Fuels
    • F23N2239/04—Gaseous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/06—Space-heating and heating water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/08—Regulating air supply or draught by power-assisted systems
    • F23N3/082—Regulating air supply or draught by power-assisted systems using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel

Definitions

  • the invention relates to gas boilers of the sealed type with forced draft and relates more precisely to a new mode of regulation by microprocessor.
  • a regulation must therefore first centralize precise information at all times on the actual air flow and on the fan speed since we know that there is not necessarily an exact correspondence between these two parameters, for example in fouling or blockage of conduits.
  • a regulation system must also ensure a safety function both at the time of ignition but also during operation by monitoring the temperature in various places of the appliance to correct excess or insufficient temperature or to put the appliance safe if necessary.
  • the regulation must collect and analyze at each instant, as a function of the determined setpoint values, characteristic signals of deviations from these values, supplied by sensors.
  • GB-A 2 021 815 is shown in an automatic control system for the proper functioning of a burner, from sensors at the intake valves giving the value of the air flow necessary for combustion as well as the quantity of fuel.
  • the indicators are connected to a microprocessor, associated with a memory and an analogical digital converter, which compares the received signals and modifies consequently the level of opening of the concerned valves.
  • the invention proposes a regulation device which avoids the drawbacks specific to known systems, which allows verification at all times of the regulation card of the apparatus by simulation of commands, which allows adaptability of the systems by a simple change of memory. without touching the components, which provides full proportional and derivative proportional control fine and finally has dimensional advantages.
  • the microprocessor control unit is connected to at least two temperature sensors, one consisting of the room thermostat and the other being located on the heating water return duct, it is connected also: to an air flow sensor mounted on the air passage orifice of the distribution box, to a rotation speed sensor mounted on the exhaust fan motor, and to contactors providing various information on the domestic water withdrawal and the ignition cycle.
  • the device shown consists of a sealed enclosure 1, the bottom of which isolates the sealed part from the mechanisms and regulating members arranged at the bottom, the assembly being mounted on the same frame, not shown.
  • a hood 2 for evacuating the burnt gases in the shape of L caps a fin block 3 which constitutes the heating body of the appliance, the skirt 4 of which channels the gases coming from the burners 5.
  • an exhaust fan 6 On the vertical part of the chimney hood is fitted with an exhaust fan 6, the drive motor of which occupies the space between the hood and the upper part of the enclosure.
  • the fan 6 extracts the combustion gases through an exhaust pipe 8 coaxial with the air intake pipe 9.
  • the latter opens into an air distributor box 10 placed at the upper part of the sealed enclosure, itself in communication through an orifice 11 with the interior chamber.
  • the reversing valve 15 the closing member of which is not shown distributes the primary hot water leaving the exchanger by the duct 16, either towards the heating flow 17, with return by the duct 20 or towards a short circuit.
  • a pump 19 being interposed on the common conduit 21 returning to the exchanger.
  • the sanitary water circuit supplied by the inlet tube 22 supplies the water to the draw-off points by the sanitary water departure tube 23.
  • an igniter 24 provides a spark train to the pilot 25.
  • the purpose of the regulation system is to control end members as a function of information collected by sensors.
  • the microprocessor control box 26 receives for this purpose information from temperature sensors such as the room thermostat 27 mounted outside the appliance and the heating water return sensor 28 mounted on the duct 21.
  • the information are also received from an air flow sensor 29 mounted on the air intake orifice 11 inside the sealed enclosure from the distribution box 10.
  • These sensors except the room thermostat , deliver an analog signal (variable voltage depending on the quantity to be measured) which must be converted into digital values which can be assimilated by the microprocessor.
  • other information is provided by a sensor 30 mounted on the motor 7 of the exhaust fan.
  • Said sensor detects the passage of four magnets fixed on the end of the motor shaft or of a notched disc followed by an optoelectric reader and delivers a digital signal whose frequency is proportional to the speed of the motor.
  • information on the drawing of sanitary water is provided by a drawing contact 31 disposed at the level of the reversing valve 15.
  • a contact linked to the igniter 24 provides the box 26 with information on the ignition cycle.
  • the terminal members capable of being thus controlled by the regulation system are the gas solenoid valve 12, the water circulation pump 19, the igniter 24, and in the sealed enclosure of the device the exhaust fan. 6.
  • a first initialization sequence aims to "teach" the microprocessor the context in which it will regulate the boiler. This sequence is as follows: - the gas inlet and the igniter 24 are inhibited; the exhaust fan 6 is put into operation at maximum speed then the microprocessor thanks to the sensor 29 comes to read the value of the air flow rate which passes through the orifice 11 of the distributor box 10 to the interior chamber of the device. This value must be equal to a determined value below which there would be a failure to install and stop programming. If this value is therefore normal, it is stored in memory after calculation, as being the minimum flow value corresponding to the full flow rate of the exhaust fan.
  • This fan is then passed to 50% of its maximum speed and a new flow measurement is carried out.
  • the memorized value then represents the minimum value of air flow for the small flow of fan 6. This is then stopped; the igniter 24 is energized to light the pilot 25. Releasing the push button at the circuit breaker box 14 completes this initialization sequence.
  • the microprocessor periodically reads the state of the temperature sensors at room thermostat 27 and at draw-off contact 31.
  • the circulation pump 19 remains stopped and the fan d is not only starts very intermittently (for example 15 seconds every 5 minutes) and at reduced speed (50% of nominal speed) to ensure the air supply to the pilot.
  • the circulation pump 19 Upon receipt of an order from the room thermostat 27, that is to say as soon as the temperature sensed is below the predetermined threshold, and there is a demand for calories, the circulation pump 19 starts up; the gas inlet by the solenoid valve 12 and the speed of the exhaust fan 6 are then modulated by the microprocessor 26 in order to ensure a constant proportionality of the air-gas mixture and to maintain a water return temperature of heating via line 20, equal to the set temperature adjusted by the user since the power is adaptable to the needs of the installation. In the event of burner 5 stopping, it will not be able to re-ignite before a certain delay (of the order of one minute for example) in order to avoid excessively repeated cycles of ignition and extinction.
  • the pump and the exhaust fan will be kept in operation for some time (for example 45 seconds) after the gas has stopped and the ignition of the burner will only take place through a small phase. flow to ensure silent ignition.
  • the air flow sensor 29 informs the microprocessor 26 of the air flow admitted into the device through the orifice 11. If the latter is insufficient to ensure correct combustion of the gas introduced, the flow of gas will then be reduced to reach the mixture suitable for correct combustion.
  • the microprocessor Upon receipt of an order from the drawing contact 31, that is to say as soon as there is a call for calories when the user draws water, because this call has priority over heating , the microprocessor then regulates the primary circuit (16, 21) that the reversing valve 15 distributes via the short circuit 18. This regulation of a principle analogous to that of heating operation is done at a fixed setpoint value making it possible to obtain a satisfactory temperature on the secondary drawing-off circuit.
  • This microprocessor-based control system also provides a test program making it possible to verify the operation of the control card outside the boiler by simulating the commands sent to the terminal members as a function of information applied to the inputs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Control Of Combustion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Gas Burners (AREA)
EP82401584A 1981-08-27 1982-08-26 Chaudière à gaz étanche à tirage forcé avec régulation par microprocesseur Expired EP0073717B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401584T ATE20381T1 (de) 1981-08-27 1982-08-26 Dichter gasheizkessel mit erzwungenem zug und mikroprozessorenregelung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8116373 1981-08-27
FR8116373A FR2512179A1 (fr) 1981-08-27 1981-08-27 Chaudiere a gaz etanche a tirage force avec regulation par microprocesseur

Publications (2)

Publication Number Publication Date
EP0073717A1 EP0073717A1 (fr) 1983-03-09
EP0073717B1 true EP0073717B1 (fr) 1986-06-11

Family

ID=9261717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401584A Expired EP0073717B1 (fr) 1981-08-27 1982-08-26 Chaudière à gaz étanche à tirage forcé avec régulation par microprocesseur

Country Status (7)

Country Link
US (1) US4519540A (es)
EP (1) EP0073717B1 (es)
JP (1) JPH0660737B2 (es)
AT (1) ATE20381T1 (es)
DE (1) DE3271661D1 (es)
ES (1) ES515288A0 (es)
FR (1) FR2512179A1 (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4102050A1 (de) * 1990-01-25 1991-08-01 Vaillant Joh Gmbh & Co Regel- und steuerungssystem fuer ein vorzugsweise gasbeheiztes wassererhitzergeraet
AT396830B (de) * 1987-12-11 1993-12-27 Vaillant Gmbh Gasbeheiztes gerät
US5616995A (en) 1993-02-22 1997-04-01 General Electric Company Systems and methods for controlling a draft inducer for a furnace
US5676069A (en) 1993-02-22 1997-10-14 General Electric Company Systems and methods for controlling a draft inducer for a furnace
US5680021A (en) 1993-02-22 1997-10-21 General Electric Company Systems and methods for controlling a draft inducer for a furnace
US5682826A (en) 1993-02-22 1997-11-04 General Electric Company Systems and methods for controlling a draft inducer for a furnace

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FR2549941B1 (fr) * 1983-07-29 1985-09-20 Sdecc Dispositif de securite pour appareil a gaz de chauffage et de production d'eau chaude a ventilation mecanique controlee
JPS62190322A (ja) * 1986-02-18 1987-08-20 Rinnai Corp 燃焼制御装置
ATE115710T1 (de) * 1987-02-07 1994-12-15 Vaillant Gmbh Verfahren zum regeln des verbrennungsluftdurchsatzes für eine brennstoffbeheizte wärmequelle.
FR2640732B1 (fr) * 1988-12-20 1991-04-05 Fond Franco Belges Procede et dispositif de regulation automatique d'une chaudiere a combustible solide a chargement discontinu et tirage force, en particulier d'une chaudiere a bois
US4965755A (en) * 1989-01-27 1990-10-23 Honeywell Inc. Method and apparatus for monitoring AC input signals
US5023816A (en) * 1989-01-27 1991-06-11 Honeywell Inc. Method and apparatus for conditioning AC input signals
FR2645255B1 (fr) * 1989-03-28 1991-07-05 Vidalenq Maurice Chaudiere a tubes d'eau et installation de chauffage equipee d'une telle chaudiere
US4962749A (en) * 1989-11-13 1990-10-16 Carrier Corporation Method of operating a natural gas furnace with propane
US5148374A (en) * 1990-06-19 1992-09-15 Icc Technologies, Inc. Desiccant space conditioning control system and method
IT1243055B (it) * 1990-09-28 1994-05-23 Ineco Srl Procedimento e dispositivo di controllo del rapporto comburente/ combustibile, particolarmente per caldaie.
US5418438A (en) * 1993-02-26 1995-05-23 General Electric Company Draft inducer air flow control
DE9310458U1 (de) * 1993-03-05 1994-06-30 Landis & Gyr Business Support Ag, Zug Elektronische Steuer- bzw. Regeleinrichtung für Gasbrenner von Heizungsanlagen
US5400962A (en) * 1993-10-27 1995-03-28 Pvi Industries, Inc. System and method for reduced purge operation of a forced draft burner in a water heater
US5706191A (en) * 1995-01-19 1998-01-06 Gas Research Institute Appliance interface apparatus and automated residence management system
GB2304878A (en) * 1995-09-12 1997-03-26 Satermic S L Forced draft controlling device for gas-oil heaters
US5865611A (en) * 1996-10-09 1999-02-02 Rheem Manufacturing Company Fuel-fired modulating furnace calibration apparatus and methods
CH691783A5 (de) 1997-02-06 2001-10-15 Siemens Building Tech Ag Steuer- und Regelgerät für einen Brenner.
US6061604A (en) * 1997-05-06 2000-05-09 Gas Research Institute RF base repeater for automated residence management system
US6161535A (en) * 1999-09-27 2000-12-19 Carrier Corporation Method and apparatus for preventing cold spot corrosion in induced-draft gas-fired furnaces
FR2811743B1 (fr) * 2000-07-11 2002-10-11 Parolini Jean Michel Dispositif de commande de ventilateur d'un bruleur de chaudiere visant a reduire les condensations
US6536678B2 (en) * 2000-12-15 2003-03-25 Honeywell International Inc. Boiler control system and method
US6745085B2 (en) 2000-12-15 2004-06-01 Honeywell International Inc. Fault-tolerant multi-node stage sequencer and method for energy systems
US6647302B2 (en) 2000-12-15 2003-11-11 Honeywell International Inc. Human interface panel for boiler control system
US6813631B2 (en) * 2000-12-15 2004-11-02 Honeywell International Inc. Automatic self configuration of client-supervisory nodes
DE10109808C2 (de) * 2001-03-01 2003-12-04 Bosch Gmbh Robert Verfahren und Vorrichtung zur Anpassung eines brennerbetriebenen Heizgerätes an ein Luft-Abgas-System
US8251297B2 (en) * 2004-04-16 2012-08-28 Honeywell International Inc. Multi-stage boiler system control methods and devices
DE102012016606A1 (de) * 2012-08-23 2014-02-27 Robert Bosch Gmbh Verfahren zur Regelung einer Heizeinrichtung und Heizeinrichtung
CN106403292B (zh) * 2016-09-05 2019-06-04 广东万家乐燃气具有限公司 一种带直流泵的热水循环装置
CN106766186B (zh) * 2016-12-26 2022-06-21 广东万家乐燃气具有限公司 一种带直流泵的热水循环装置及其控制系统
CN110388739B (zh) * 2019-07-05 2021-05-14 广东万家乐燃气具有限公司 一种点火反馈针、燃烧器及燃气热水设备

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DE1429125A1 (de) 1963-05-07 1968-11-07 Saunier Duval Zuendvorrichtung fuer den Gasbrenner eines Heisswasserbereiters,der ausserhalb seiner Anlaufzeit keine brennende Zuendhuelse aufweist
FR2287655A1 (fr) 1974-10-08 1976-05-07 Saunier Duval Dispositif de regulation de chaudiere a gaz a tirage force
DE2555358A1 (de) 1974-12-24 1976-07-08 Saunier Duval Regelvorrichtung fuer gasheizgeraete mit kuenstlichem abzug
DE2920343A1 (de) 1978-05-24 1979-11-29 Land Pyrometers Ltd Vorrichtung zur steuerung von brennern

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US4375950A (en) * 1981-04-01 1983-03-08 Durley Iii Benton A Automatic combustion control method and apparatus

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Publication number Priority date Publication date Assignee Title
DE1429125A1 (de) 1963-05-07 1968-11-07 Saunier Duval Zuendvorrichtung fuer den Gasbrenner eines Heisswasserbereiters,der ausserhalb seiner Anlaufzeit keine brennende Zuendhuelse aufweist
FR2287655A1 (fr) 1974-10-08 1976-05-07 Saunier Duval Dispositif de regulation de chaudiere a gaz a tirage force
DE2555358A1 (de) 1974-12-24 1976-07-08 Saunier Duval Regelvorrichtung fuer gasheizgeraete mit kuenstlichem abzug
DE2920343A1 (de) 1978-05-24 1979-11-29 Land Pyrometers Ltd Vorrichtung zur steuerung von brennern

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Title
PROSPEKT ''OKTAMATIK'' DER FA. VIESSMANN
SONDERDRUCK: ''INNOVATIVE ANWENDUNG MIKROELEKTRONIK SONDERSCHAU AUF DER HANNOVER MESSE '80 ...

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396830B (de) * 1987-12-11 1993-12-27 Vaillant Gmbh Gasbeheiztes gerät
DE4102050A1 (de) * 1990-01-25 1991-08-01 Vaillant Joh Gmbh & Co Regel- und steuerungssystem fuer ein vorzugsweise gasbeheiztes wassererhitzergeraet
AT400484B (de) * 1990-01-25 1996-01-25 Vaillant Gmbh Regel- und steuersystem für einen vorzugsweise gasbeheizten wassererhitzer
US5616995A (en) 1993-02-22 1997-04-01 General Electric Company Systems and methods for controlling a draft inducer for a furnace
US5676069A (en) 1993-02-22 1997-10-14 General Electric Company Systems and methods for controlling a draft inducer for a furnace
US5680021A (en) 1993-02-22 1997-10-21 General Electric Company Systems and methods for controlling a draft inducer for a furnace
US5682826A (en) 1993-02-22 1997-11-04 General Electric Company Systems and methods for controlling a draft inducer for a furnace

Also Published As

Publication number Publication date
FR2512179A1 (fr) 1983-03-04
ES8305484A1 (es) 1983-05-01
FR2512179B1 (es) 1983-12-09
US4519540A (en) 1985-05-28
EP0073717A1 (fr) 1983-03-09
ES515288A0 (es) 1983-05-01
JPH0660737B2 (ja) 1994-08-10
ATE20381T1 (de) 1986-06-15
JPS5886323A (ja) 1983-05-23
DE3271661D1 (en) 1986-07-17

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