EP0736733A2 - Lufteinspritzvorrichtung für Gebläsebrenner - Google Patents

Lufteinspritzvorrichtung für Gebläsebrenner Download PDF

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Publication number
EP0736733A2
EP0736733A2 EP96420112A EP96420112A EP0736733A2 EP 0736733 A2 EP0736733 A2 EP 0736733A2 EP 96420112 A EP96420112 A EP 96420112A EP 96420112 A EP96420112 A EP 96420112A EP 0736733 A2 EP0736733 A2 EP 0736733A2
Authority
EP
European Patent Office
Prior art keywords
air
fan
burner
injection device
diaphragm seal
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
EP96420112A
Other languages
English (en)
French (fr)
Other versions
EP0736733B1 (de
EP0736733A3 (de
Inventor
René Aldeguer
Thierry Serré
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.)
Morice et Cie Traitogaz Ets
Original Assignee
Morice et Cie Traitogaz Ets
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 Morice et Cie Traitogaz Ets filed Critical Morice et Cie Traitogaz Ets
Publication of EP0736733A2 publication Critical patent/EP0736733A2/de
Publication of EP0736733A3 publication Critical patent/EP0736733A3/de
Application granted granted Critical
Publication of EP0736733B1 publication Critical patent/EP0736733B1/de
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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit

Definitions

  • the present invention relates to an air injection device for a gas burner, with blown air.
  • This invention relates to all gas burners, blown air, and more particularly burners incorporated in gas cooking appliances and gas boilers.
  • a fan is provided which sucks in air, taken from the outside, and which injects this air into a circuit, more or less long. , leading to the burner (s).
  • the combustible gas is also injected into this circuit.
  • the present invention aims to remedy these drawbacks by providing an air injection device for a supply air burner, which, while being of particularly simple structure and very compact, creates a partial air discharge effect. to the fan, allowing cleaning of the fan impeller as well as cooling of the surrounding components.
  • the invention essentially relates to an air injection device for a gas burner, with supply air, comprising a fan whose air outlet orifice is connected to an air inlet of a duct belonging to a circuit leading to at least one gas burner, the device being characterized in that, between the air outlet of the fan and the air inlet of said conduit, is interposed a diaphragm seal of small thickness, preferably made of relatively rigid thermal insulating material, the central region of which is pierced by at least one calibrated opening allowing passage to the flow of blown air to be directed by the above-mentioned circuit towards the or the burners, while all around its opening (s), the diaphragm seal has a solid surface capable of returning part of the air flow to the fan.
  • the diaphragm seal is inserted, by its periphery, between a first flange delimiting the air outlet opening of the fan, and a second flange delimiting the air inlet of the duct cited above.
  • the invention proposes, to regulate the air flow, the insertion of a diaphragm seal of suitable configuration which is mounted directly at the outlet of the fan, and which does not occupy more space than a simple seal sealing, the presence of which is in any case compulsory at this location.
  • the central opening of the diaphragm seal is calibrated to allow the necessary and sufficient air flow to pass to the burner (s), taking into account all the gases with which the burner (s) concerned are in practice usable.
  • the part of the air flow which does not pass through the central opening of the diaphragm seal is discharged towards the fan turbine, the diaphragm seal being located near the turbine, which ensures a permanent cleaning of the turbine, avoiding the fouling thereof.
  • the exhaust air also creates a turbulent atmosphere all around the fan, which effectively cools the sensitive components located in the environment of the fan and giving off heat, for example: thermostat, pressure switch, solenoid valves, regulating blocks.
  • a fryer comprises a tank 1, heated by means of gas burners 2, with blown air, arranged in two series on either side of the lower part of the tank 1.
  • a fan 3 with electric motor 4 and turbine 5, sucks in outside air and injects this air into a circuit 6 leading to the burners 2.
  • the circuit 6, located downstream of the fan 3, comprises at its departure a manifold 7, comprising in its middle region an air inlet connected to the air outlet of the fan 3, and is extended by two conduits 8, starting respectively from the two extreme regions of the manifold 7 and ending respectively at the two series of burners 2.
  • the apparatus comprises a fuel gas inlet 9, supplying a first circuit 10 leading to two main gas injection points 11 and 12 located respectively towards the two ends of the manifold 7, and a second circuit 13 leading to an additional gas injection point 14, used for starting, located at mid-length of the nanny 7.
  • An electronic control unit 15, associated with a general switch 16 is electrically connected to: a temperature regulation thermostat 17 and a safety thermostat 18 immersed in the tank 1, spark plugs 19 and monitoring candles 20 associated with the burners 2, a pressure switch 21 connected to the manifold 7, two solenoid valves 22 and 23 placed on the first gas injection circuit 10, and another solenoid valve 24 placed on the second gas injection circuit 13.
  • FIG. 1 shows the actual spatial arrangement of some of the previously named components. This figure shows in particular that the three solenoid valves 22, 23 and 24 are located in the vicinity of the fan 3.
  • the air outlet of this fan 3 is presented as an outlet orifice 25 of substantially rectangular shape, delimited by a first substantially rectangular flange 26.
  • the air intake, located in the middle region of the manifold 7, is presented as a substantially rectangular lateral orifice 27, delimited by a second substantially rectangular flange 28, located in correspondence with the first flange 26 - see in particular the figures 3 and 4.
  • a diaphragm seal 29 which has a corresponding substantially rectangular external shape, and which is made of a relatively rigid insulating material.
  • the periphery of the diaphragm seal 29 is tightly sealed between the two flanges 26 and 28 assembled by means of screws 30, provided for example at their four angles.
  • the diaphragm seal 29 In its central region, as shown more particularly in FIG. 5, the diaphragm seal 29 has a calibrated opening 31, of rectangular shape. At its four angles, this seal 29 is still pierced with holes 32 crossed by the screws 30.
  • the diaphragm seal 29 When the diaphragm seal 29 is mounted between the two flanges 26 and 28, it has all around its central opening 31 a solid surface 33, partially obstructing the air outlet orifice 25 of the fan 3, facing the turbine 5 of this fan 3 - see figure 6.
  • the calibrated central opening 31 of the diaphragm seal 29 allows free passage to a flow of blown air D1, which runs through the manifold 7 then the two conduits 8 to be directed to the burners 2.
  • the discharge air flow escapes out of the fan 3 as suggested in D3, and creates, around it, a turbulent atmosphere ensuring the cooling of sensitive components, such as the solenoid valves 22, 23 and 24, located near fan 3.
  • the air injection device is more particularly applicable to fryers and other gas cooking appliances for professional use, which must be used without interruption for long periods of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Frying-Pans Or Fryers (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Feeding And Controlling Fuel (AREA)
EP96420112A 1995-04-07 1996-04-03 Verwendung einer Lufteinspritzvorrichtung für Gebläsebrenner zum Reinigen eines Gebläses Expired - Lifetime EP0736733B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9504432A FR2732753B1 (fr) 1995-04-07 1995-04-07 Dispositif d'injection d'air pour bruleur a air souffle
FR9504432 1995-04-07

Publications (3)

Publication Number Publication Date
EP0736733A2 true EP0736733A2 (de) 1996-10-09
EP0736733A3 EP0736733A3 (de) 1997-04-23
EP0736733B1 EP0736733B1 (de) 1999-07-14

Family

ID=9478069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96420112A Expired - Lifetime EP0736733B1 (de) 1995-04-07 1996-04-03 Verwendung einer Lufteinspritzvorrichtung für Gebläsebrenner zum Reinigen eines Gebläses

Country Status (4)

Country Link
EP (1) EP0736733B1 (de)
AT (1) ATE182206T1 (de)
DE (1) DE69603213D1 (de)
FR (1) FR2732753B1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383820A (en) * 1980-10-10 1983-05-17 Technology Application Services Corporation Fuel gas burner and method of producing a short flame
US5171144A (en) * 1991-09-09 1992-12-15 A. O. Smith Corporation Pressurized air seal for combustion chamber

Also Published As

Publication number Publication date
EP0736733B1 (de) 1999-07-14
EP0736733A3 (de) 1997-04-23
ATE182206T1 (de) 1999-07-15
DE69603213D1 (de) 1999-08-19
FR2732753A1 (fr) 1996-10-11
FR2732753B1 (fr) 1998-05-22

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