EP0724117B1 - Dispositif de régulation pour un brûleur à soufflant à gaz - Google Patents

Dispositif de régulation pour un brûleur à soufflant à gaz Download PDF

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Publication number
EP0724117B1
EP0724117B1 EP95114195A EP95114195A EP0724117B1 EP 0724117 B1 EP0724117 B1 EP 0724117B1 EP 95114195 A EP95114195 A EP 95114195A EP 95114195 A EP95114195 A EP 95114195A EP 0724117 B1 EP0724117 B1 EP 0724117B1
Authority
EP
European Patent Office
Prior art keywords
gas
spring
valve
air
temperature
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
EP95114195A
Other languages
German (de)
English (en)
Other versions
EP0724117A1 (fr
Inventor
Alfred Hettel
Axel Obermann
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.)
Electrowatt Technology Innovation AG
Original Assignee
Landis and Gyr Technology Innovation AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Landis and Gyr Technology Innovation AG filed Critical Landis and Gyr Technology Innovation AG
Publication of EP0724117A1 publication Critical patent/EP0724117A1/fr
Application granted granted Critical
Publication of EP0724117B1 publication Critical patent/EP0724117B1/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
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/04—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements
    • F23N5/047—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/21—Measuring temperature outlet temperature
    • 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
    • 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
    • F23N2235/20—Membrane valves
    • 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
    • F23N2235/24—Valve details

Definitions

  • the invention relates to a control device for a gas fan burner according to the Preamble of claim 1.
  • Such control devices are suitable, for example, for providing combustion provided gas and the amount of combustion air matched to it.
  • a control device for a gas fan burner of the type mentioned in the preamble of claim 1 is known from DE-A1-31 05 862.
  • a gas valve is driven by the pressure generated by a blower Combustion air guided so that, for example, by changing the speed of the fan a corresponding change in the amount of air supplied to the burner also the amount of gas supplied is varied. This makes it an approximately stoichiometric one over the entire performance range Quantity control enables.
  • EP 183 157 also describes a gas / air composite controller in which the temperature of the supply air is at the setting of the gas / air ratio is taken into account.
  • a gas quantity regulator with a bimetal element is known, the bimetal element the effective opening cross-section of the gas flow controller depending on the temperature of the Gases controls.
  • 1 means a gas control valve, with the aid of which the gas supply to a burner 2 is regulated.
  • the air required for combustion, the supply of which is indicated by a letter L indicated arrow is indicated by a fan 3 through an air duct 4 to the burner 2nd promoted.
  • the gas to be burned, the supply of which is by one with the letter G indicated arrow is controlled in terms of the amount of the gas control valve 1. After Passing the gas control valve 1, the gas also reaches the burner 2 through a gas line 5.
  • the gas control valve 1 has an adjustable opening cross section, which is formed by a valve seat 6 and a valve plate 7 movable relative to it is formed.
  • the valve disk 7 is provided with a tappet 8 connected, one end of which is in contact with a membrane 9.
  • the membrane 9 forms the Separation between an air chamber 10, which is connected to the air duct 4 via a control line 11 is, so that the air pressure acts on the air space-side surface of the membrane 9, which is from the blower 4th is generated and is a measure of how much air is supplied to the burner 2.
  • On the opposite surface of the membrane 9 acts that pressure that prevails in a chamber 12.
  • This Chamber 12 is connected via a connection 13 to an outlet chamber 14.
  • the outlet chamber 14 is connected to the gas line 5 leading to the burner 2.
  • the gas control valve 1 also has an inlet chamber 15 which is connected to a gas supply device, not shown.
  • the gas control valve 1 has an adjusting element 16 with which the pressure or quantity ratio of Gas and air is adjustable. This is also present in the prior art adjusting element 16 usually an adjusting screw. This adjusting element 16 acts on a spring 17, which is on the one hand Adjusting element 16 and on the other hand supported on the valve plate 7. As with the valve plate 7 of the plunger 8th is connected and the plunger 8 is supported on the membrane 9, the spring 17 also acts on the Membrane 9.
  • a coupling member 18 is arranged between the adjusting element 16 and the spring 17.
  • This coupling member 18 is temperature sensitive, i.e. it responds to temperature changes caused by the Outlet chamber 14 flowing gas with dimensional changes. One results from these dimensional changes different bias of the spring 17.
  • the coupling member 18 can advantageously from a holder 19 and a bimetallic strip 20 exist. One side of the holder 19 is with the adjusting element 16 connected, on the other side one end of the bimetal strip 20 is attached. The free end of the Bimetallic strip 20 acts against the spring 17.
  • the bimetallic strip 20 consists of thermal bimetellum, i.e. out two rolled-up metallic strips, the two metals being different have thermal expansion coefficients.
  • the bimetallic strip 20 is such that the Metal with the larger coefficient of thermal expansion forms the side facing the spring 17.
  • the gas to be supplied to the combustion enters the gas control valve 1 through the inlet chamber 15.
  • the degree of opening of the gas control valve 1 determined by the opening cross section through the Distance between valve seat 6 and valve plate 7 is formed, a certain amount of gas flows from the inlet chamber 15 into the outlet chamber 14.
  • the degree of opening of the gas control valve 1 becomes influenced by the pressure in the air chamber 10, which is determined by the pressure in the air duct 4, and the pressure in the chamber 12, which is determined by the pressure in the outlet chamber 14.
  • the degree of opening becomes smaller or greater.
  • the underlying control principle is known.
  • the gas flowing through the outlet chamber 14 also flows around the coupling member 18, so that its Temperature is determined by the temperature of the gas flowing through. Any temperature change of the gas affects the coupling member 18. Whose temperature change is caused by the Bimetallic strip 20 implemented in a more or less large bias of the spring 17 what in turn on the effect on the membrane 9 in a change in the pressure ratio between Air chamber 10 and outlet chamber 14 is implemented.
  • the teaching of the invention can be implemented in a variety of ways. Beneficial because a particularly simple solution is one in which the coupling member 18 has a bimetallic element 20 which is on the temperature of the gas reacts. This coupling element 18 is advantageous between the Adjustment element 16 and the spring 17 arranged. A particularly simple and therefore advantageous Design results if the bimetallic element 20 is rigidly attached to the holder 19 on one side, while the free end of the bimetal element 20 presses the first end of the spring 17, the second Press the end on the valve plate 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Control Of Combustion (AREA)

Claims (4)

  1. Dispositif de régulation pour un brûleur à soufflante à gaz, dans lequel le débit de gaz est asservi au débit d'air au moyen d'une soupape de régulation de gaz (1) à action pneumatique, la soupape de régulation de gaz (1) comportant un siège de soupape (6) et un disque de soupape (7) déplaçable par rapport à ce siège, un ressort (17) agissant sur le disque de soupape (7) étant relié à un élément de réglage (16), caractérisé en ce que dans le courant de gaz à l'intérieur de la soupape de régulation de gaz (1) est disposé un élément bimétallique (20) sensible à la température et qui agit sur le disque de soupape (7).
  2. Dispositif de régulation selon la revendication 1, caractérisé en ce que l'élément bimétallique (20) est disposé entre l'élément de réglage (16) et le ressort (17).
  3. Dispositif de régulation selon la revendication 2, caractérisé en ce que l'élément de réglage (16) agit sur un dispositif de retenue (9), que l'élément bimétallique (20) est fixé rigidement, d'un côté, au dispositif de retenue (19) et que l'extrémité libre de l'élément bimétallique (20) repousse la première extrémité du ressort (17) et que la seconde extrémité du ressort (17) repousse le disque de soupape (7).
  4. Dispositif de régulation selon la revendication 3, caractérisé en ce que l'élément de réglage (16) est une vis de réglage permettant de décaler parallèlement la courbe caractéristique.
EP95114195A 1995-01-30 1995-09-09 Dispositif de régulation pour un brûleur à soufflant à gaz Expired - Lifetime EP0724117B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH243/95 1995-01-30
CH24395 1995-01-30

Publications (2)

Publication Number Publication Date
EP0724117A1 EP0724117A1 (fr) 1996-07-31
EP0724117B1 true EP0724117B1 (fr) 1998-07-08

Family

ID=4182563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95114195A Expired - Lifetime EP0724117B1 (fr) 1995-01-30 1995-09-09 Dispositif de régulation pour un brûleur à soufflant à gaz

Country Status (2)

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EP (1) EP0724117B1 (fr)
DE (1) DE59502756D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008047289A2 (fr) * 2006-10-19 2008-04-24 Gary Kenneth Diamond Soupape

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1425469A (en) * 1972-05-23 1976-02-18 Dunlop Ltd Temperature-dependent fuel flow regulators for burners
DE2607286C3 (de) * 1976-02-23 1979-03-22 Tuezelestechnikai Kutatointezet, Miskolc (Ungarn) Luftmengensteuerung fur Feuerstatten
DE3105862A1 (de) 1981-02-18 1982-09-09 Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden Gas-geblaesebrenner
JPS57166416A (en) * 1981-04-04 1982-10-13 Chugai Ro Kogyo Kaisha Ltd Automatic air-fuel ratio controller of combustion equipment using preheated air
DE3443533A1 (de) * 1984-11-29 1986-06-05 Karl Dungs Gmbh & Co, 7067 Urbach Gasfeuerungsanlage mit einem gas/luft-verbundregler
JPS6370022A (ja) * 1986-09-11 1988-03-30 Hitachi Zosen Corp 高炉ガス焚ボイラにおける高炉ガス発熱量補正装置
CH680749A5 (fr) * 1990-04-04 1992-10-30 Landis & Gyr Betriebs Ag
DE4109841C2 (de) 1991-03-26 1994-06-09 Bosch Gmbh Robert Regelvorrichtung für Gasbrenner mit einem Gebläse zum Zuführen von Verbrennungsluft

Also Published As

Publication number Publication date
EP0724117A1 (fr) 1996-07-31
DE59502756D1 (de) 1998-08-13

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