EP0384280A2 - Dispositif de chauffage pour des unités mobiles - Google Patents

Dispositif de chauffage pour des unités mobiles Download PDF

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Publication number
EP0384280A2
EP0384280A2 EP90102862A EP90102862A EP0384280A2 EP 0384280 A2 EP0384280 A2 EP 0384280A2 EP 90102862 A EP90102862 A EP 90102862A EP 90102862 A EP90102862 A EP 90102862A EP 0384280 A2 EP0384280 A2 EP 0384280A2
Authority
EP
European Patent Office
Prior art keywords
switched
ignition
combustion air
air blower
motor
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.)
Granted
Application number
EP90102862A
Other languages
German (de)
English (en)
Other versions
EP0384280B1 (fr
EP0384280A3 (fr
Inventor
Erich Kenner
Peter Reiser
Gerhard Gaysert
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
J Eberspaecher 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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP0384280A2 publication Critical patent/EP0384280A2/fr
Publication of EP0384280A3 publication Critical patent/EP0384280A3/fr
Application granted granted Critical
Publication of EP0384280B1 publication Critical patent/EP0384280B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays 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
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/02—Starting or ignition cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/04—Prepurge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/14—Vehicle heating, the heat being derived otherwise than from the propulsion plant

Definitions

  • the invention relates to a heater for mobile units, e.g. Motor vehicles, with a burner for liquid fuel, which has a combustion air blower with a motor, a mixing device for generating a fuel / air mixture, an ignition electrode arrangement and a combustion chamber, and with a controller for controlling the ignition process.
  • a heater for mobile units e.g. Motor vehicles
  • a burner for liquid fuel which has a combustion air blower with a motor, a mixing device for generating a fuel / air mixture, an ignition electrode arrangement and a combustion chamber, and with a controller for controlling the ignition process.
  • Such heaters are usually used as so-called auxiliary or auxiliary heaters in passenger and truck vehicles and in buses.
  • the liquid fuel (petrol or diesel oil) is mixed with combustion air using a blower motor and a mixing device and burned in a combustion chamber.
  • the heat generated in the combustion chamber is dissipated with the help of a heat transfer medium (air or water).
  • the fuel is atomized using a pressure atomizer.
  • the fuel is expelled from a fuel nozzle with pressure, and air is directed from the combustion air blower into the area of the nozzle so that the sprayed-out fuel mixes well with the air.
  • the high air flow rate leads to a good mixing of air and fuel during operation, but has the disadvantage that there are ignition difficulties, especially at high operating voltages in a cold environment.
  • the object of the invention is to provide a heater of the type mentioned, in which a perfect ignition is guaranteed even at high operating voltages and / or low temperatures.
  • control system so that the ignition process takes place while the speed of the combustion air blower motor is below the operating speed, switches the engine off and, at the same time or somewhat later, ignites by means of the ignition electrode arrangement.
  • the invention is particularly effective and interesting in connection with pressure atomizing burners with high-voltage ignition.
  • the heaters are usually operated in such a way that the combustion air blower is started first after being switched on in order to "pre-flush” the burner.
  • the invention now provides that the combustion air blower is first switched on for this “pre-purging”, but then switched off again for a first predetermined period of time, i.e. to be de-energized so that the speed decreases steadily when the blower motor runs out. In this phase of constantly decreasing fan speed, the ignition point falls after the fuel supply is switched on.
  • the composition of the mixture is constantly changing, i.e. it is in an optimal state for ignition at any time. In any case, it is achieved that a mixture which is most suitable for the ignition is present.
  • the speed of the combustion air blower must be increased again to the value intended for normal operation by re-energizing the blower motor. You can set the time to turn the blower back on so that it is a certain amount of time away from turning the blower off.
  • the heaters in question have a flame detection device which, in conjunction with the control device of the device, ensures that the ignition process or the operation of the device is stopped, in particular the fuel supply is interrupted if there is no flame for a certain period of time is.
  • the signal supplied by the flame detection device is used according to the invention to switch the combustion air blower on again after the ignition process.
  • the heater is thus started by first switching on the combustion air fan after a certain period of time is switched off, then the fuel supply is switched on (a solenoid valve in the fuel line is opened), an ignition voltage is applied to the ignition electrodes, and the signal supplied by the flame detection device causes the combustion air blower to be switched on again.
  • the engine of the combustion air blower is switched off, and the speed of the blower continuously decreases until the blower is switched on again after flame detection, even if a speed range for a possible ignition is known, after switching on the combustion air blower motor and after its operating speed for stationary operation is reached, the motor is switched off and then switched on and off intermittently a certain time later, so that during the intermittent switching of the blower motor, the fuel supply begins and the ignition is switched on and that after the ignition, the blower motor is continuously energized again.
  • the ignition timing falls within a range of steady decrease in fan speed
  • an intermittent operation of the fan motor ensures that the fan operates in a certain range of relatively low speed.
  • the procedure is such that the intermittent switching on and off is controlled in accordance with two predetermined voltage levels, for which purpose with the blower motor switched off, which then works as a generator because it runs on due to its own inertia, the EMF is detected and compared with the two voltage levels becomes.
  • the control devices required for this are easy to implement using the control devices already present in such heaters. For example, there is a test circuit which is used to test the function of the blower motor after it has started.
  • the motor that is started is briefly switched off and the EMF generated by the motor that then works as a generator is recorded during the switch-off time.
  • This device can also be used to obtain the two voltage levels mentioned for controlling the intermittent switching of the blower motor. Basically, you can also work with a single comparison voltage level to switch the blower motor on again when a minimum level is reached. The motor is switched on in the meantime during predefined fixed time intervals.
  • the invention is specifically directed to an auxiliary heater with a pressure atomizing burner and high-voltage ignition.
  • Such devices are generally known and do not need to be explained in more detail here. In the present case, it is specifically about the ignition process.
  • the motor of the combustion air blower is switched on when the device is switched on. Then the pre-rinse phase follows. From the switch-on time (t0), it takes a certain time until the combustion air blower has reached the nominal speed of, for example, 5000 rpm. At a time t1, the combustion air blower is switched off. The fan continues to run at a steadily decreasing speed. Simultaneously with the switching off of the fan (t 1) or at a certain time t 2 after switching off the combustion air fan, the ignition is switched on, and the solenoid valve contained in the fuel line is opened, so that fuel is supplied to the fuel nozzle. The one out of the nozzle kicking fuel mixes with the combustion air coming from the combustion air blower.
  • the time interval between t2 and t1 can preferably - as I said - be zero, but it can also be set to a finite value depending on the "ignition speed" to be expected.
  • the ignition is switched on after the combustion air blower is switched off, e.g. at a speed of 3800 rpm, and the ignition of the fuel / air mixture then takes place at a somewhat lower speed.
  • Fig. 2 shows the speed curve of the combustion air blower motor in connection with the on and off signals of the engine according to another embodiment of the invention.
  • the combustion air blower motor After switching off the voltage source, the combustion air blower motor works as a generator and generates an EMF which depends on the respective speed n.
  • the air flow rate V is approximately proportional to the speed.
  • the motor is switched off.
  • the EMF then generated by the blower motor is determined and with a lower smolder lenwert c compared. If the two compared values at time ta are the same, the blower motor is switched on again. A higher threshold value b is reached at time t b , so that the blower motor is switched off again at this time t b .
  • the speed of the combustion air blower moves between the two values c and b.
  • the fuel supply is switched on and the ignition electrodes are switched on.
  • the flame is recognized and the blower motor is again continuously energized.
  • the determination of the speed or the EMF according to the level b can be omitted, and instead the duty cycle b during which the blower motor is briefly switched on can be determined. Based on empirical values, the value b can be determined in such a way that after this period a speed is reached which corresponds approximately to the value b.

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)
  • Air-Conditioning For Vehicles (AREA)
EP90102862A 1989-02-23 1990-02-14 Dispositif de chauffage pour des unités mobiles Expired - Lifetime EP0384280B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905603A DE3905603A1 (de) 1989-02-23 1989-02-23 Heizgeraet fuer mobile einheiten
DE3905603 1989-02-23

Publications (3)

Publication Number Publication Date
EP0384280A2 true EP0384280A2 (fr) 1990-08-29
EP0384280A3 EP0384280A3 (fr) 1991-07-03
EP0384280B1 EP0384280B1 (fr) 1993-11-24

Family

ID=6374758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102862A Expired - Lifetime EP0384280B1 (fr) 1989-02-23 1990-02-14 Dispositif de chauffage pour des unités mobiles

Country Status (6)

Country Link
US (1) US5078317A (fr)
EP (1) EP0384280B1 (fr)
CA (1) CA2010851C (fr)
DD (1) DD292180A5 (fr)
DE (2) DE3905603A1 (fr)
ES (1) ES2046551T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19524261A1 (de) * 1995-07-04 1997-01-09 Eberspaecher J Steuerung der Zündung eines Verdampfungsbrenners
DE19507556B4 (de) * 1994-10-20 2004-12-30 J. Eberspächer GmbH & Co. KG Verfahren zum Starten eines Brenners für ein Fahrzeugheizgerät oder einen Partikelfilter-Regenerator
DE102007031264A1 (de) * 2007-07-05 2009-01-08 J. Eberspächer GmbH & Co. KG Verfahren zum Betreiben eines brennstoffbetriebenen Heizgeräts, insbesondere Fahrzeugheizgerät
EP2116771A1 (fr) * 2008-05-09 2009-11-11 Truma Gerätetechnik GmbH & Co. KG Démarrage et fonctionnement à coefficient d'air optimisé d'un brûleur
EP3054216A1 (fr) * 2015-02-09 2016-08-10 Spheros GmbH Procede de commande pour le processus d'allumage d'un appareil de chauffage a combustible

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360335A (en) * 1992-10-22 1994-11-01 Honeywell Inc. Fuel burner control system with selectable standing pilot mode
US6077068A (en) * 1995-08-31 2000-06-20 Ngk Insulators, Ltd. Pulsated combustion apparatus and a method for controlling such a pulsated combustion apparatus
KR19980030377A (ko) * 1996-10-29 1998-07-25 배순훈 폭발점화방지를 위한 가스보일러의 착화방법
WO2015067504A1 (fr) * 2013-11-08 2015-05-14 Carparts Kliem Thomas Procédé permettant de faire fonctionner un système de thermorégulation de véhicule
AU2017244041B2 (en) 2016-03-30 2022-12-01 Marine Canada Acquisition Inc. Vehicle heater and controls therefor
US10935238B2 (en) * 2018-05-23 2021-03-02 Carrier Corporation Furnace with premix ultra-low NOx (ULN) burner
DE102020108198A1 (de) 2020-03-25 2021-09-30 Vaillant Gmbh Verfahren und Vorrichtung zur Verbesserung des Zündverhaltens eines Vormischbrenners
DE102022123906A1 (de) 2022-09-19 2024-03-21 Vaillant Gmbh Verfahren zum Betreiben eines Heizgerätes, Computerprogramm, Regel- und Steuergerät, Heizgerät und Verwendung einer zweigeteilten Gaszuführung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2786632A (en) * 1953-11-16 1957-03-26 Honeywell Regulator Co Control apparatus for forced air furnace
FR2033983A6 (fr) * 1969-02-18 1970-12-04 Sueddeutsche Kuehler Behr
FR2250960A1 (en) * 1973-11-13 1975-06-06 United Gas Industries Ltd Control system for a fuel burner - has a standby condition with reduced air supply to pilot flame
EP0030736A2 (fr) * 1979-12-17 1981-06-24 SERVO-Instrument in Deutschland Alleinvertrieb der BEAB-Regulatoren GmbH & Co KG Appareil de régulation de la quantité d'air de combustion pour un brûleur
US4370126A (en) * 1978-09-11 1983-01-25 Hitaci, Ltd. Combustion control apparatus
FR2512928A1 (fr) * 1981-09-16 1983-03-18 Webasto Werk Baier Kg W Procede et dispositif pour demarrer et faire fonctionner un bruleur de chauffage, notamment d'un chauffage de vehicule
JPS61126453A (ja) * 1984-11-26 1986-06-13 Hitachi Ltd 炎光光度計の燃焼装置
JPS61225547A (ja) * 1985-03-29 1986-10-07 Rinnai Corp 温風暖房機
US4729207A (en) * 1986-09-17 1988-03-08 Carrier Corporation Excess air control with dual pressure switches
JPH02161210A (ja) * 1988-12-14 1990-06-21 Sanyo Electric Co Ltd 燃焼装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221799A (en) * 1964-02-27 1965-12-07 Honeywell Inc Burner control apparatus
DE2931936C2 (de) * 1979-08-07 1985-10-17 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Mit fließfähigem Brennstoff betriebene Heizvorrichtung
US4439140A (en) * 1982-03-29 1984-03-27 Honeywell Inc. Energy saving boiler purge sequence control

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2786632A (en) * 1953-11-16 1957-03-26 Honeywell Regulator Co Control apparatus for forced air furnace
FR2033983A6 (fr) * 1969-02-18 1970-12-04 Sueddeutsche Kuehler Behr
FR2250960A1 (en) * 1973-11-13 1975-06-06 United Gas Industries Ltd Control system for a fuel burner - has a standby condition with reduced air supply to pilot flame
US4370126A (en) * 1978-09-11 1983-01-25 Hitaci, Ltd. Combustion control apparatus
EP0030736A2 (fr) * 1979-12-17 1981-06-24 SERVO-Instrument in Deutschland Alleinvertrieb der BEAB-Regulatoren GmbH & Co KG Appareil de régulation de la quantité d'air de combustion pour un brûleur
FR2512928A1 (fr) * 1981-09-16 1983-03-18 Webasto Werk Baier Kg W Procede et dispositif pour demarrer et faire fonctionner un bruleur de chauffage, notamment d'un chauffage de vehicule
JPS61126453A (ja) * 1984-11-26 1986-06-13 Hitachi Ltd 炎光光度計の燃焼装置
JPS61225547A (ja) * 1985-03-29 1986-10-07 Rinnai Corp 温風暖房機
US4729207A (en) * 1986-09-17 1988-03-08 Carrier Corporation Excess air control with dual pressure switches
JPH02161210A (ja) * 1988-12-14 1990-06-21 Sanyo Electric Co Ltd 燃焼装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 416 (M-1021)(4359) 07 September 1990, & JP-A-02 161210 (SANYO ELECTRIC CO LTD) 21 Juni 90, *
PATENT ABSTRACTS OF JAPAN, Bd. 11, Nr. 67 (M-566)(2514), 28. Februar 1987;& JP-A-61225547 *
PATENT ABSTRACTS OF JAPAN, Bd. 14, Nr. 416 (M-1021)(4359) 07 September 1990;& JP-A-02 161210 *
PATENT ABSTRACTS OF JAPAN, Bd. 1O, Nr. 316 (P-510)(2372), 28. Oktober 1986;& JP-A-61126453 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19507556B4 (de) * 1994-10-20 2004-12-30 J. Eberspächer GmbH & Co. KG Verfahren zum Starten eines Brenners für ein Fahrzeugheizgerät oder einen Partikelfilter-Regenerator
DE19524261A1 (de) * 1995-07-04 1997-01-09 Eberspaecher J Steuerung der Zündung eines Verdampfungsbrenners
DE19524261B4 (de) * 1995-07-04 2006-08-17 J. Eberspächer GmbH & Co. KG Verfahren zum Starten eines Verdampfungsbrenners
DE102007031264A1 (de) * 2007-07-05 2009-01-08 J. Eberspächer GmbH & Co. KG Verfahren zum Betreiben eines brennstoffbetriebenen Heizgeräts, insbesondere Fahrzeugheizgerät
DE102007031264B4 (de) 2007-07-05 2018-10-18 Eberspächer Climate Control Systems GmbH & Co. KG Verfahren zum Betreiben eines brennstoffbetriebenen Heizgeräts, insbesondere Fahrzeugheizgerät
EP2116771A1 (fr) * 2008-05-09 2009-11-11 Truma Gerätetechnik GmbH & Co. KG Démarrage et fonctionnement à coefficient d'air optimisé d'un brûleur
EP3054216A1 (fr) * 2015-02-09 2016-08-10 Spheros GmbH Procede de commande pour le processus d'allumage d'un appareil de chauffage a combustible

Also Published As

Publication number Publication date
DE59003566D1 (de) 1994-01-05
CA2010851C (fr) 1995-01-03
DD292180A5 (de) 1991-07-25
CA2010851A1 (fr) 1990-08-23
DE3905603A1 (de) 1990-08-30
ES2046551T3 (es) 1994-02-01
DE3905603C2 (fr) 1992-01-02
EP0384280B1 (fr) 1993-11-24
EP0384280A3 (fr) 1991-07-03
US5078317A (en) 1992-01-07

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