EP0339499B1 - Supervision device for the burner plate operation of a panel burner - Google Patents

Supervision device for the burner plate operation of a panel burner Download PDF

Info

Publication number
EP0339499B1
EP0339499B1 EP89107176A EP89107176A EP0339499B1 EP 0339499 B1 EP0339499 B1 EP 0339499B1 EP 89107176 A EP89107176 A EP 89107176A EP 89107176 A EP89107176 A EP 89107176A EP 0339499 B1 EP0339499 B1 EP 0339499B1
Authority
EP
European Patent Office
Prior art keywords
burner
burner plate
region
mixture
plate
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 - Lifetime
Application number
EP89107176A
Other languages
German (de)
French (fr)
Other versions
EP0339499A2 (en
EP0339499A3 (en
Inventor
Hans-Albrecht Kohlmann
Thomas Pieper
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.)
N.V. VAILLANT S.A.
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Original Assignee
Vaillant Austria GmbH
Nv Vaillant Sa
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Vaillant BV
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 Vaillant Austria GmbH, Nv Vaillant Sa, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, Vaillant BV filed Critical Vaillant Austria GmbH
Publication of EP0339499A2 publication Critical patent/EP0339499A2/en
Publication of EP0339499A3 publication Critical patent/EP0339499A3/en
Application granted granted Critical
Publication of EP0339499B1 publication Critical patent/EP0339499B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/725—Protection against flame failure by using flame detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00012—Liquid or gas fuel burners with flames spread over a flat surface, either premix or non-premix type, e.g. "Flächenbrenner"

Definitions

  • the invention relates to a radiant surface burner with a device for monitoring the operation of the burner plate penetrated by mixture outlet openings by means of at least one electrode measuring the ionization in the flame area of the burner, this electrode being assigned a limited area of the burner plate in which the burner flames with a greater length than are dimensioned in the remaining area of the burner plate.
  • the mixture of fuel gas and combustion air which is premixed in optimal proportions, is already ignited within the burner plate consisting of ceramic material, steel wool or the like and burns with very short flames which have a very short reaction time. These flames can be so short that they cannot be seen, but only a glow from the burner plate is observed.
  • malfunctions can occur when setting a partial load of the burner output because no flames that can be used for monitoring are formed on the top of the burner plate, but the short burner flames in the burner plate disappear and become uncontrollable.
  • GB-OS 2 076 958 provides for the electrode to be assigned a burner area which has longer flames, since secondary air is increasingly supplied to this area through wall openings.
  • An extension of the flames is also achieved by special dimensioning of the mixture outlet openings - as is known from JP-OS 59-157 412.
  • a disadvantage of both methods is the instability and the considerable fluctuation range of the flame length with changing burner parameters.
  • the invention has for its object to address a further possibility for flame extension, which is characterized by stability and precise adjustability.
  • the object is achieved in that mixture guides are attached to the underside of the burner plate and are fed via a common combustion air guide and a common fuel supply line, a branch line then opening from the fuel supply line into a branch of the combustion air guide feeding the delimiting region of the burner plate continues in its own mixture guide, in which the proportion of air is smaller than in the rest of the burner plate.
  • the length of the burner flames can be locally increased in a simple and precisely adjustable manner by appropriate cross-sectional dimensioning of the branch line or the mixture line (s).
  • the figure shows a schematic vertical section through the mixture guide of a surface burner.
  • the burner plate 1 is made of a conductive material, e.g. B. steel, steel wool or the like, and is connected together with the electrode 3 to the power source 7.
  • the burner plate 1 is supplied with a gas-air mixture from below via a mixture guide 8.
  • the combustion air flows to this mixture guide 8 via a combustion air guide 9, in which there is a nozzle head 11 formed with radial gas nozzles 10, which is fed with fuel gas via a gas supply line 12.
  • a branch line 13 of this gas supply line 12 opens into a separate mixture guide 14, which supplies only that portion 4 of the burner plate 1 with mixture above which the electrode 3 is located.
  • the proportion of air in this mixture fed to sub-area 4 is to be dimensioned by dimensioning the branch line 13 and the separate mixture guide 14 in such a way that it is higher in the mixture flowing into the mixture guide 8 than in the separate mixture guide 14.
  • the flames that form at the mixture outlet openings 5 inevitably become longer than those that start at the mixture outlet openings 2.
  • the longer flames enable the electrode 3 to measure the ionization and to display the burner operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

The operation of a burner plate (1), passed through by mixture outlet openings (2), of a panel-burner, in particular radiation burner, is supervised by means of at least one electrode (3) which measures the ionisation in the flame region. In order to ensure that a burner flame which is usable for ionisation measurement is available to this electrode (3), a limited region (4) of the burner plate (1) is assigned to it, in which the burner flames are dimensioned with a greater length than in the remaining region of the burner plate (1). Longer burner flames in this region (4) can be achieved by dimensioning the mixture outlet openings (5) of this region (4) smaller than the remaining mixture outlet openings (2) of the burner plate (1) or by dimensioning the air proportion of the mixture supplied to the burner plate (1) in this region (4) smaller than in the remaining region of the burner plate (1). <IMAGE>

Description

Die Erfindung betrifft einen Strahlungs-Flächenbrenner mit einer Vorrichtung zur Überwachung des Betriebes der von Gemischaustrittsöffnungen durchsetzten Brennerplatte mittels mindestens einer die Ionisation im Flammenbereich des Brenners messenden Elektrode, wobei dieser Elektrode ein begrenzter Bereich der Brennerplatte zugeordnet ist, in dem die Brennerflammen mit einer größeren Länge als im übrigen Bereich der Brennerplatte bemessen sind.The invention relates to a radiant surface burner with a device for monitoring the operation of the burner plate penetrated by mixture outlet openings by means of at least one electrode measuring the ionization in the flame area of the burner, this electrode being assigned a limited area of the burner plate in which the burner flames with a greater length than are dimensioned in the remaining area of the burner plate.

Bei solchen Flächenbrennern wird das aus Brenngas und Verbrennungsluft bestehende, in optimalen Anteilen vorgemischte Gemisch bereits innerhalb der aus keramischem Material, Stahlwolle oder dergleichen bestehenden Brennerplatte gezündet und verbrennt mit sehr kurzen Flammen, die eine sehr kurze Reaktionszeit aufweisen. Diese Flammen können so kurz sein, daß sie nicht selbst zu sehen sind, sondern nur ein Glühen der Brennerplatte zu beobachten ist.In such surface burners, the mixture of fuel gas and combustion air, which is premixed in optimal proportions, is already ignited within the burner plate consisting of ceramic material, steel wool or the like and burns with very short flames which have a very short reaction time. These flames can be so short that they cannot be seen, but only a glow from the burner plate is observed.

Bei der Überwachung solcher Flächenbrenner ergeben sich deshalb Probleme, weil eine Überwachung mittels die Ionisation im Flammenbereich messender Elektroden darauf beruht, daß die Leitfähigkeit und der Gleichrichtereffekt der Brennerflammen für die Ionisationsmessung maßgebend ist.Problems arise when monitoring such surface burners because monitoring by means of electrodes measuring ionization in the flame region is based on the fact that the conductivity and the rectifying effect of the burner flames are decisive for the ionization measurement.

Beispielsweise kann es bei der Einstellung einer Teillast der Brennerleistung zu Störungen kommen, weil sich an der Oberseite der Brennerplatte keine zur Oberwachung benutzbaren Flammen ausbilden, sondern die kurzen Brennerflammen in der Brennerplatte verschwinden und unkontrollierbar werden.For example, malfunctions can occur when setting a partial load of the burner output because no flames that can be used for monitoring are formed on the top of the burner plate, but the short burner flames in the burner plate disappear and become uncontrollable.

Zur Lösung dieses Problems ist gemäß der GB-OS 2 076 958 vorgesehen, daß der Elektrode ein Brennerbereich zugeordnet ist, der längere Flammen aufweist, indem durch Wandöffnungen diesem Bereich verstärkt Sekundärluft zugeführt wird. Eine Verlängerung der Flammen wird auch durch besondere Dimensionierung der Gemischaustrittsöffnungen erreicht - wie aus der JP-OS 59-157 412 bekannt. Nachteilig ist bei beiden Verfahrensweisen die Instabilität und die erhebliche Schwankungsbreite der Flammenlänge bei sich ändernden Brennerparametern.
Der Erfindung liegt die Aufgabe zugrunde, eine weitere Möglichkeit zur Flammenverlängerung anzugehen, die sich durch Stabilität und genaue Einstellbarkeit auszeichnet.To solve this problem, GB-OS 2 076 958 provides for the electrode to be assigned a burner area which has longer flames, since secondary air is increasingly supplied to this area through wall openings. An extension of the flames is also achieved by special dimensioning of the mixture outlet openings - as is known from JP-OS 59-157 412. A disadvantage of both methods is the instability and the considerable fluctuation range of the flame length with changing burner parameters.
The invention has for its object to address a further possibility for flame extension, which is characterized by stability and precise adjustability.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß an die Unterseite der Brennerplatte Gemischführungen ansetzen, die über eine gemeinsame Verbrennungsluftführung und eine gemeinsame Brennstoffzufuhrleitung gespeist sind, wobei dann von der Brennstoffzufuhrleitung eine Zweigleitung in einen den begrenzenden Bereich der Brennerplatte speisenden Zweig der Verbrennungsluftführung mündet, die sich in einer eigenen Gemischführung fortsetzt, in welcher der Luftanteil geringer bemessen ist als im übrigen Bereich der Brennerplatte. Die Länge der Brennerflammen kann durch zielführende Querschnittsbemessung der Zweigleitung oder der Gemischleitung(en) auf einfache und exakt einstellbare Weise örtlich vergrößert werden.According to the invention, the object is achieved in that mixture guides are attached to the underside of the burner plate and are fed via a common combustion air guide and a common fuel supply line, a branch line then opening from the fuel supply line into a branch of the combustion air guide feeding the delimiting region of the burner plate continues in its own mixture guide, in which the proportion of air is smaller than in the rest of the burner plate. The length of the burner flames can be locally increased in a simple and precisely adjustable manner by appropriate cross-sectional dimensioning of the branch line or the mixture line (s).

Ein Ausführungsbeispiel eines erfindungsgemäßen Strahlungs-Flächenbrenners ist nachstehend anhand einer Zeichnungsfigur erläutert.An embodiment of a radiant surface burner according to the invention is explained below with reference to a drawing figure.

Die Figur zeigt einen schematischen Vertikalschnitt durch die Gemischführung eines Flächenbrenners.The figure shows a schematic vertical section through the mixture guide of a surface burner.

Gemäß dieser Ausführungsform besteht die Brennerplatte 1 aus einem leitenden Material, z. B. Stahl, Stahlwolle oder dergleichen, und ist gemeinsam mit der Elektrode 3 an die Stromquelle 7 angeschlossen.According to this embodiment, the burner plate 1 is made of a conductive material, e.g. B. steel, steel wool or the like, and is connected together with the electrode 3 to the power source 7.

Die Brennerplatte 1 wird von unten her über eine Gemischführung 8 mit einem Gas-Luft-Gemisch versorgt. Die Verbrennungsluft strömt dieser Gemischführung 8 über eine Verbrennungsluftführung 9 zu, in der sich ein mit radialen Gasdüsen 10 ausgebildeter Düsenkopf 11 befindet, der über eine Gaszufuhrleitung 12 mit Brenngas gespeist wird. Eine Zweigleitung 13 dieser Gaszufuhrleitung 12 mündet in einer separaten Gemischführung 14, die nur jenen Teilbereich 4 der Brennerplatte 1 mit Gemisch versorgt, oberhalb dessen sich die Elektrode 3 befindet. Der Luftanteil in diesem dem Teilbereich 4 zugeführten Gemisch ist durch zielführende Dimensionierung der Zweigleitung 13 und der separaten Gemischführung 14 so zu bemessen, daß er in dem der Gemischführung 8 zuströmenden Gemisch höher als in der separaten Gemischführung 14 ist. Dadurch werden die Flammen, die sich an den Gemischaustrittsöffnungen 5 bilden, zwangsläufig länger als jene, die an den Gemischaustrittsöffnungen 2 ansetzen. Die längeren Flammen befähigen die Elektrode 3 zur Messung der Ionisation und zur Anzeige des Brennerbetriebes.The burner plate 1 is supplied with a gas-air mixture from below via a mixture guide 8. The combustion air flows to this mixture guide 8 via a combustion air guide 9, in which there is a nozzle head 11 formed with radial gas nozzles 10, which is fed with fuel gas via a gas supply line 12. A branch line 13 of this gas supply line 12 opens into a separate mixture guide 14, which supplies only that portion 4 of the burner plate 1 with mixture above which the electrode 3 is located. The proportion of air in this mixture fed to sub-area 4 is to be dimensioned by dimensioning the branch line 13 and the separate mixture guide 14 in such a way that it is higher in the mixture flowing into the mixture guide 8 than in the separate mixture guide 14. As a result, the flames that form at the mixture outlet openings 5 inevitably become longer than those that start at the mixture outlet openings 2. The longer flames enable the electrode 3 to measure the ionization and to display the burner operation.

Claims (1)

  1. A radiant surface burner comprising means for monitoring the operation of the burner plate, which is formed with mixture exit through openings, by means of at least one electrode, which measures the ionization in the flame region of the burner and with which a limited region of the burner plate is associated, in which the burner flames have a larger length than in the remaining region of the burner plate, characterized in that mixture-guiding ducts (8 and 14) extend from the underside of the burner plate (1) and are fed through a common combustion air line (9) and a common fuel supply line (12), a branch line (13) extends from the fuel supply line (12) into a branch (15) of the combustion air-guiding duct (9), which branch feeds the limited range of the burner plate and is continued by a separate mixture-guiding duct (14), which contains air in a lower proportion than the remaining region of the burner plate.
EP89107176A 1988-04-28 1989-04-21 Supervision device for the burner plate operation of a panel burner Expired - Lifetime EP0339499B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1089/88 1988-04-28
AT1089/88A AT391197B (en) 1988-04-28 1988-04-28 DEVICE FOR MONITORING THE OPERATION OF THE BURNER PLATE OF A SURFACE BURNER IMPLEMENTED BY MIXTURE OUTLETS

Publications (3)

Publication Number Publication Date
EP0339499A2 EP0339499A2 (en) 1989-11-02
EP0339499A3 EP0339499A3 (en) 1991-03-20
EP0339499B1 true EP0339499B1 (en) 1993-12-15

Family

ID=3506345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107176A Expired - Lifetime EP0339499B1 (en) 1988-04-28 1989-04-21 Supervision device for the burner plate operation of a panel burner

Country Status (3)

Country Link
EP (1) EP0339499B1 (en)
AT (2) AT391197B (en)
DE (2) DE58906394D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399557B (en) * 1991-11-27 1995-06-26 Vaillant Gmbh BURNER

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399558B (en) * 1993-06-14 1995-06-26 Vaillant Gmbh BURNER
DE19502900C2 (en) * 1995-01-31 1997-12-18 Stiebel Eltron Gmbh & Co Kg Ionization electrode
DE29708377U1 (en) * 1997-05-09 1997-07-17 Viessmann Werke Gmbh & Co, 35108 Allendorf Gas surface burner
DE19860636A1 (en) * 1998-12-29 2000-07-06 Ruhrgas Ag Burner monitoring method involves mixing partial gas flow with combustion air in second reaction chamber after heating phase, burning mixture, monitoring burner with ionisation electrode
DE19912076A1 (en) * 1999-03-18 2000-09-21 Kromschroeder Ag G Premix burner for gaseous fuels
NL1025986C2 (en) * 2004-04-20 2005-10-24 Eco Ceramics B V Ceramic burner.
DE102005056499B4 (en) * 2005-11-28 2009-04-23 Ceramat, S. Coop., Asteasu gas burner
ITMO20070167A1 (en) * 2007-05-21 2008-11-22 Worgas Bruciatori Srl MODULATING BURNER
EP2177830A1 (en) * 2008-10-16 2010-04-21 Siemens Building Technologies HVAC Products GmbH Gas burner for a combined gas-air control system
KR101817371B1 (en) 2009-12-11 2018-01-11 베카에르트 컴버스천 테크놀러지 비.브이. Burner with low porosity burner deck
DE102009058453B4 (en) * 2009-12-16 2011-09-01 Robert Bosch Gmbh Gas blower burner with modulable burner power and method for operating a gas blower burner
DE102012014009A1 (en) * 2012-07-17 2014-01-23 Robert Bosch Gmbh Surface burner and method for monitoring flame formation in a surface burner
CN103791499B (en) * 2012-11-01 2017-04-19 林内株式会社 Combustion device
EP2975324A1 (en) * 2014-07-15 2016-01-20 Orkli, S. Coop. Combustion system suitable for a boiler or a heater, particularly a condensing boiler or heater
DE102014226060A1 (en) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Burner device and method for optimizing a burner device
DE102015223681A1 (en) * 2015-11-30 2017-06-01 Robert Bosch Gmbh Heat generator, in particular burner, in particular gas and / or oil burner, for generating heat, monitoring device and method for monitoring combustion thereto
DE202016105039U1 (en) * 2016-09-12 2017-09-14 Viessmann Werke Gmbh & Co Kg gas burner
DE102017213767A1 (en) * 2017-08-08 2019-02-14 Robert Bosch Gmbh Burner cover, method of making a burner cover, and a surface burner
DE102017128802A1 (en) * 2017-12-05 2019-06-06 Vaillant Gmbh Fully premixing gas burner
IT202000002209A1 (en) 2020-02-05 2021-08-05 Polidoro S P A PREMIX BURNER

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT378845B (en) * 1979-06-06 1985-10-10 Nibelle Pierre Dkfm COOKING AREA FOR A GAS STOVE
AU541670B2 (en) * 1980-05-29 1985-01-17 Matsushita Electric Industrial Co., Ltd. Burner
JPS59157412A (en) * 1983-02-25 1984-09-06 Hitachi Ltd Ceramics burner
JPS60155824A (en) * 1984-01-24 1985-08-15 Matsushita Electric Ind Co Ltd Oxygen starvation safety device
DE3636294A1 (en) * 1985-10-25 1987-04-30 Rinnai Kk BURNER DEVICE WITH BLOWER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399557B (en) * 1991-11-27 1995-06-26 Vaillant Gmbh BURNER

Also Published As

Publication number Publication date
DE8905014U1 (en) 1989-06-15
ATE98762T1 (en) 1994-01-15
DE58906394D1 (en) 1994-01-27
AT391197B (en) 1990-08-27
ATA108988A (en) 1990-02-15
EP0339499A2 (en) 1989-11-02
EP0339499A3 (en) 1991-03-20

Similar Documents

Publication Publication Date Title
EP0339499B1 (en) Supervision device for the burner plate operation of a panel burner
DE2539993C2 (en) Burners for liquid or gaseous fuel
DE3116376C2 (en)
DE2510126A1 (en) PROCESS AND DEVICE FOR BURNING LIQUID AND GASEOUS FUELS
DE2842125C2 (en) Ground torch device
DE3606625A1 (en) Pilot burner with low NOx emission for furnace installations, in particular of gas turbine installations, and method of operating it
DE9007627U1 (en) Burners with low NOx emissions
DE2365287A1 (en) SAFETY DEVICE FOR A GAS APPLIANCE
EP0212190B1 (en) Device for cutting work pieces
DE3826279C2 (en) Gas burner with a burner chamber
DE1451610B2 (en) Device for igniting and monitoring the flames of a pilot burner and a main burner
AT395061B (en) GAS NOZZLE
DE4143144C2 (en) Machine cutting torch with internal ignition device
DE4311009A1 (en) Method and arrangement for supplying burn-out air to the flue gas stream of a steam boiler fired by coal dust
DE2819075A1 (en) Atmospheric gas burner with injection chamber - has adjustment tube for gas and air flow opposite ignition electrode
DE3232648C2 (en) Device for burning exhaust air containing combustible substances with the admixture of a fuel gas
DE1903408C (en) Pilot burner
DE3025948C2 (en) Area burner
DE2510717B2 (en) Device for burners to regulate the fuel-air ratio
DE2306009C3 (en) Device for the flameless combustion of gaseous or vaporous fuel-air mixtures
DE1814031C3 (en) Burner device for gaseous fuel
DE4341029A1 (en) Gas burner using induced atmospheric air and gas type compensation
DE143657C (en)
DE19628710A1 (en) Fully pre-mixing atmospheric burner - has gas nozzles directed at mixing pipes, with air pipes fed by fan at top where burner heads are located
DE8224775U1 (en) Device for burning exhaust air containing combustible substances

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19910320

17Q First examination report despatched

Effective date: 19920317

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VAILLANT GMBH

Owner name: VAILLANT B.V.

Owner name: VAILLANT LTD.

Owner name: VAILLANT GES.M.B.H

Owner name: JOH. VAILLANT GMBH U. CO.

Owner name: VAILLANT S.A.R.L

Owner name: N.V. VAILLANT S.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19931215

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19931215

Ref country code: SE

Effective date: 19931215

Ref country code: BE

Effective date: 19931215

Ref country code: GB

Effective date: 19931215

Ref country code: FR

Effective date: 19931215

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19931215

REF Corresponds to:

Ref document number: 98762

Country of ref document: AT

Date of ref document: 19940115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 58906394

Country of ref document: DE

Date of ref document: 19940127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940430

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19931215

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19950323

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19960319

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19960411

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19960421

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960430

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970430

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19971101

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19971101