EP0440475A2 - Haushaltsfeuer mit Gasbeheizung - Google Patents

Haushaltsfeuer mit Gasbeheizung Download PDF

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Publication number
EP0440475A2
EP0440475A2 EP91300767A EP91300767A EP0440475A2 EP 0440475 A2 EP0440475 A2 EP 0440475A2 EP 91300767 A EP91300767 A EP 91300767A EP 91300767 A EP91300767 A EP 91300767A EP 0440475 A2 EP0440475 A2 EP 0440475A2
Authority
EP
European Patent Office
Prior art keywords
gas
burner according
chamber
port
fire
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.)
Withdrawn
Application number
EP91300767A
Other languages
English (en)
French (fr)
Other versions
EP0440475A3 (de
Inventor
Baigue Stanley Le
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.)
LE BAIGUE RESEARCH LIMITED
Original Assignee
LE BAIGUE RESEARCH Ltd
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
Priority claimed from GB909002262A external-priority patent/GB9002262D0/en
Application filed by LE BAIGUE RESEARCH Ltd filed Critical LE BAIGUE RESEARCH Ltd
Publication of EP0440475A2 publication Critical patent/EP0440475A2/de
Publication of EP0440475A3 publication Critical patent/EP0440475A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/002—Stoves
    • F24C3/006—Stoves simulating flames

Definitions

  • the burner of a coal or log effect gas fire includes at least one independently formed exit port through which pre-aerated gas flows to the combustion region of the fire, the port extending through a resilient bed or layer of insulating material.
  • the introduction of independently formed exit ports into a resilient bed of insulating material overcomes many of the problems associated with previous coal or log effect gas fires using primary aeration.
  • the resilient bed of insulating material serves a dual function. It acts firstly as an insulator so that it assists in preventing back-ignition (thereby allowing larger exit ports), reduces heat loss to the metal parts of the burner, and substantially increases the radiant heat output from the fire. It acts secondly to absorb sound and therefore produces a quieter fire. It has the further advantage that it does not crack and is not friable.
  • the bed or layer of insulating material is preferably spaced from the base of the tray to provide a passage for the flow of aerated gas in the space beneath the insulating material.
  • the sound absorbing properties of the bed or layer are enhanced if a rigid support member for the bed or layer is provided with apertures through which the sound waves can pass to the sound-absorbing insulating material.
  • the resilient bed or layer may comprise loose particulate or fibrous insulating material, but preferably comprises a fibrous blanket.
  • the insulating material is preferably a refractory material conforming to British Standard 3446:1962 (No. 1042).
  • the exit port or ports are preferably formed of metal and may have any desired shape.
  • a preferred exit port is in the form of an elongate slot.
  • the preferred arrangement is a ceramic fibrous blanket supported on a perforated metal plate. The or each metal exit port extends upwardly from the perforated plate such that the aerated gas passes through the plate into the port or ports. The passage of gas through the perforations further reduces the risk of back-ignition.
  • the burner includes a chamber having separate air and gas inlets, and means disposed within the chamber for entraining the inlet air into the gas flow, the inlet air being directed along a folded path and at least part of the said path being lined by sound-absorbing material.
  • gas from a domestic supply is fed through a pipe 10 to a gas jet 11 (not shown in Fig. 4) located in a primary air inlet box 12.
  • the metal box 12 has a front wall 40, opposed side walls 41, 42 and a rear wall 43.
  • the front wall 40 has an air inlet 13, and also receives the gas pipe 10.
  • the gas jet 11 is aligned inside the box with a venturi duct 14 (not shown in Fig. 4) so that air drawn in through the inlet 13 is entrained into the gas stream flowing through the duct 14.
  • the walls 40, 41, 42 and 43 are each lined with a sound attenuating material 32 such as mineral wool.
  • the lining 32 on the front wall 40 includes a projection 33 extending back part-way across the box and forming a partition between the air inlet 13 and the gas jet 11.
  • the air entering the inlet 13 is therefore forced to follow a labyrinth path (shown by the arrows in Fig. 4) before being entrained into the gas stream 45.
  • the top and bottom walls 34, 35 of the box 12 are also lined with, or consist of, the sound absorbing material 32.
  • the aerated gas from the duct 14 emerges through an opening in the rear wall 43 of the box 12 into a chamber 15 forming part of a burner tray 16.
  • the tray has a flat base 17 with a rear downward step 30 forming the lower chamber 15, and upstanding side walls 18, 19, 20 and 21.
  • a ceramic fibre blanket 22 is supported within the tray 16 by a perforated metal plate 24.
  • the blanket 22 is disposed on each side of an exit port 26.
  • the two parts of the blanket each consist of a resilient block of insulating refractory material conforming to British Standard 3446:1962 (No. 1042) and made from bulk fibre without the inclusion of binders.
  • the ceramic fibre is an alumino-silicate fibre made from blends of high purity alumina and silica.
  • the perforated plate 24 supporting the blanket 22 rests on, or is secured to, metal brackets 25 fixed to the opposing side walls 19, 21. Accordingly, gas from the chamber 15 is able to flow between the base 17 of the tray and the perforated metal plate 24.
  • a small proportion of the gas/air mixture may diffuse upwardly through the perforated plate 24 and the ceramic fibre blanket, but the major portion flows beneath the blanket toward the front of the tray and then passes upwardly through the exit port 26 extending across the width of the tray.
  • the exit port 26 is formed independently of the blanket 22 by two opposing metal strips 27, 28 upstanding from the plate 24 and spot welded to one another at intervals along the exit orifice 44 at the top of the slot. These spot welds 29 ensure that the width of the exit orifice remains constant at high temperatures.
  • the strips 27, 28 are shaped such that at least the uppermost portion of the slot 26 is inclined rearwardly and gas emerging from the slot is directed toward the back of the fire. Each strip is spot welded to the perforated plate 24.
  • the blanket 22 is cut slightly oversize before installing it in the tray 16 such that the blanket is resiliently compressed between each of the strips 26, 27 forming the slot 26 and the respective side walls 19, 21 of the tray. This prevents any significant leakage of gas around the edges of the blanket.
  • the exit port 26 provides a passage for the uninterrupted flow of gas through the blanket 22 to the combustion region of the fire.
  • the aerated gas enters the port 26 through the perforations in the plate 24.
  • the perforations increase the velocity of the gas and ensure that this velocity exceeds the flame speed when the fire is burning.
  • a non-resilient block 50 of refractory material is preferably superposed over the portion of the blanket 22 located to the rear of the slot 26.
  • the front portion of the block 50 has a series of spaced channels 51 cut into its top surface. It has been found that the addition of this refractory board or block leads to a cleaner fire with reduced carbon monoxide being produced (improved CO/CO2 ratio).
  • the shape of the block 50 and/or of the channels 51 can be varied to provide a predetermined flame pattern.
  • the combustion region contains randomly disposed and/or prearranged refractory bodies 30 in the form of imitation coal or logs (not shown in Figs. 2 and 3), and the gas/air mixture burns within the spaces between these bodies to produce a simulated coal or log fire.
  • the ceramic fibre blanket 22 insulates the metal parts of the burner from the heat of combustion since only the top edge of the metal tray 16 and the top edge 44 of the exit port 26 are exposed to this heat. Substantially all the heat is therefore reflected upwards by the blanket which acts as a hot-face, and this adds to the radiant heat output of the fire.
  • the insulation of the exit port 26 prevents the port being damaged by overheating.
  • the metal tray 16 and the perforated metal plate 24 remain relatively cool and are therefore able to conduct heat away from the gas/air mixture, thereby further reducing any risk of back-ignition.
  • the blanket 22 also acts as an efficient sound attenuator, further reducing the noise of the fire.
  • the perforations in the plate 24 ensure that sound waves produced by the flow of gas through the burner are able to pass into the sound-absorbing blanket.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Chimneys And Flues (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP19910300767 1989-01-23 1991-01-31 Haushaltsfeuer mit Gasbeheizung Withdrawn EP0440475A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA000588927A CA1337472C (en) 1989-01-23 1989-01-23 Domestic gas fires
GB9002262 1990-02-01
GB909002262A GB9002262D0 (en) 1990-02-01 1990-02-01 Domestic gas fires

Publications (2)

Publication Number Publication Date
EP0440475A2 true EP0440475A2 (de) 1991-08-07
EP0440475A3 EP0440475A3 (de) 1991-08-28

Family

ID=25672398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910300767 Withdrawn EP0440475A3 (de) 1989-01-23 1991-01-31 Haushaltsfeuer mit Gasbeheizung

Country Status (3)

Country Link
EP (1) EP0440475A3 (de)
CA (1) CA1337472C (de)
GB (1) GB2240620B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519718A2 (de) * 1991-06-21 1992-12-23 Le Baigue Research Limited Gasofen mit einem Element zur Simulierung von Festbrennstoff

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2331802A (en) * 1997-11-26 1999-06-02 Baigue Stephen John Le Gas burner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1561099A (en) * 1977-11-24 1980-02-13 Parker E Gas silencer
GB2179438A (en) * 1985-07-17 1987-03-04 Flamelog And Coal Fires Limite Solid-fuel simulating gas fire
FR2617576A1 (fr) * 1987-07-01 1989-01-06 Auer Soc Ind Dispositif formant bruleur a gaz, notamment pour appareil de chauffage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1561099A (en) * 1977-11-24 1980-02-13 Parker E Gas silencer
GB2179438A (en) * 1985-07-17 1987-03-04 Flamelog And Coal Fires Limite Solid-fuel simulating gas fire
FR2617576A1 (fr) * 1987-07-01 1989-01-06 Auer Soc Ind Dispositif formant bruleur a gaz, notamment pour appareil de chauffage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519718A2 (de) * 1991-06-21 1992-12-23 Le Baigue Research Limited Gasofen mit einem Element zur Simulierung von Festbrennstoff
EP0519718A3 (en) * 1991-06-21 1993-05-19 Le Baigue Magiglo Ltd Simulated solid fuel gas fires

Also Published As

Publication number Publication date
GB9102105D0 (en) 1991-03-13
CA1337472C (en) 1995-10-31
EP0440475A3 (de) 1991-08-28
GB2240620B (en) 1993-11-24
GB2240620A (en) 1991-08-07

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