EP0145298A2 - Appareil de chauffage de locaux - Google Patents

Appareil de chauffage de locaux Download PDF

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Publication number
EP0145298A2
EP0145298A2 EP84307798A EP84307798A EP0145298A2 EP 0145298 A2 EP0145298 A2 EP 0145298A2 EP 84307798 A EP84307798 A EP 84307798A EP 84307798 A EP84307798 A EP 84307798A EP 0145298 A2 EP0145298 A2 EP 0145298A2
Authority
EP
European Patent Office
Prior art keywords
gas
supply means
aerated
appliance according
further characterised
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Withdrawn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
EP84307798A
Other languages
German (de)
English (en)
Other versions
EP0145298A3 (fr
Inventor
John Leslie Beaumont
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.)
John L Beaumont Ltd
Original Assignee
John L Beaumont 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
Application filed by John L Beaumont Ltd filed Critical John L Beaumont Ltd
Publication of EP0145298A2 publication Critical patent/EP0145298A2/fr
Publication of EP0145298A3 publication Critical patent/EP0145298A3/fr
Withdrawn legal-status Critical Current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 present invention concerns space heating appliances such as open fires using gas as a fuel but giving the visual effect of a solid fuel burner.
  • British Patent 284867 of 1927 discloses gas fires having radiant plagues heated by non-luminous flames having in addition luminous flames to give the appearance of a coal fire.
  • the plaques are uniformly heated and thus there is little of the ever-charging flame patterns typical of a solid fuel fire and thus such burners look artificial and not very similar to the solid fuel fire they are intended to resemble.
  • a more true appearance is obtained by having the gas diffuse through a bed of particles simulating ash and cinders and burning on the surface on which larger articles simulate the solid fuel (coal or logs) as shown in British Patent 1541423.
  • low heat outputs means heat outputs at the bottom of the permissible range of outputs below which partial combustion of the fuel could result in carbon monoxide emissions.
  • a low heat output would correspond to a consumption of 20,000 British Thermal Units per hour.
  • radiant plaque heaters lower heat outputs may be possible by confining the "fire" to a central strip by cutting off the fuel gas supply to one or more of a plurality of individual burners as in British Patent 1474033 with a further loss of realism.
  • aerated and “non-aerated” mean respectively aerated to a substantial extent conventionally containing half the amount of air for stoichometric combustion so it will burn with a blue, barely visible, flame and aerated to zero or low extent so it will burn with a yellow visible flame.
  • a space heating appliance for giving the effect of a solid fuel fire having a bed of porous material simulating in use cinders and glowing ash with larger material on top simulating in use burning solid fuel such as logs or coal, the bed having an outer roomside edge, at least one fuel gas supply means for gas which will burn with a luminous flame and at least one fuel gas supply means for gas which will burn with an aerated non-luminous flame, the means being disposed so that the gas flows upwardly through at least part of the bed depth, is characterised in that the fuel supply means for the aerated gas is directed to a zone along the outer edge and that the fuel supply means for the luminous burning gas is directed to a zone remote from that edge and in that a gas flow regulator at desired low heat outputs prevents flow of the luminously burning gas and regulates flow of the aerated burning gas and only at higher heat outputs permits an additional flow of the luminously burning gas.
  • the visual effect is not merely that the roomside edge has a red glow with a shimmering blue barely visible flame typical of a fire down to ashes and cinders but in addition since the hot gases are swept over the larger material by a flue effect, a combination of wall attachment of gas flow and the aspiration of room air (mainly the latter), this larger material also glows. This gives a very good visual effect.
  • any aerated gas entering the second zone is of course ignited by the main flow through the first zone.
  • the appliance restricting that amount of aerated gas which escapes to the second zone surprisingly allows the appliance to operate at very low heat outputs without the emission of noxious gases.
  • it would be possible to use a shallow bed of porous material in the first zone it is felt that the natural appearance of the first zone could be impaired if the gas was not evenly diffused. Therefore it is preferred to use a normal depth of material and to separate the zones by a baffle, the top edge of which can be concealed within the material leaving a shallow depth of material over the baffle.
  • the escape path for aerated gas trying to enter the second zone is very shallow and relatively long (the width of the box) and so little aerated gas will enter the second zone.
  • the fire given as an example above can be operated at consumptions of 12,000 British Thermal Units per hour. The lower the consumption the less the running cost would be and this is an impressive advantage since most fires of this size can only be turned down to 20,000 British Thermal Units per hour.
  • Another advantage of the appliance according to the present invention is that the heat output build-up when ignited is rapid, and the arrangement is such as to give out heat efficiently even at low outputs.
  • a convenient form of supply means box is one having a lid with depending flanges at front and rear so the emerging gas first flows downwardly and then upwards being diffused by the material on both passes.
  • a burner tray 11 mounts a control panel 12 and a pilot light assembly 13 and contains a burner box 14.
  • the tray can be trapezoidal as shown to fit into a normal hearth and has upturned outer walls 15.
  • the box is conveniently rectangular with upturned walls 16 which are wholly within the tray.
  • the box is towards the front of the tray and spaced about 1 centimetre from the front of the tray (the front is the longer of the two parallel sides of the tray and when the tray is installed will be on the room-side of the fire).
  • a space can be left between the bottom of the box and the tray to allow air to enter the tray through holes (not shown) and flow below the box to merge with the gas in the tray.
  • a partition divides the box into a rear chamber 17 and a front chamber 18.
  • the box and thus the two chambers are sealed by a lid or cover 19 with depending front and rear flanges except for long narrow passages 20 along the front and rear of the box between on the one hand the cover and the flanges and on the other hand the front and rear walls of the box; each chamber has a gas entry 21.
  • Refractory materials 22 for simulating glowing ash, cinders and other embers, expanded mica is preferred as having nearly ideal properties in a low thermal capacity, good temperature resistance, poor thermal conductivity and all other relevant characteristics is distributed over the tray concealing the box and its lid, the particle size of this material (as is known) is small enough to diffuse the gas and so that the gas will burn only on the surface of the material.
  • Further refractory material 23 for simulating solid fuel such as logs or coal is placed on top of the material 22. The materials in order to simulate a real solid fuel fire is heaped up towards the back or the centre of a circular fire.
  • a mains supply 30 of fuel gas is split into three branches 24, 25 and 26 which are connected to a regulator 27 of the type that from an "off" position first permits a predetermined flow through the branch 24 (to the pilot light assembly 13), then a flow through the branch 25 preferably from a minimum preset rate progressively to a maximum design flow and thereafter progressively regulates flow through the branch 26.
  • a regulator 27 of the type that from an "off" position first permits a predetermined flow through the branch 24 (to the pilot light assembly 13), then a flow through the branch 25 preferably from a minimum preset rate progressively to a maximum design flow and thereafter progressively regulates flow through the branch 26.
  • Such regulators are readily available and consist of three valves ganged together with mechanical detents to preset the minimum flow rates.
  • the branch 25 leads to an air aspirator 28, to mix into the gas the usual amount of air for an aerated flame which is about half the stoichometric amount, to the front chamber.
  • the branch 26 leads directly to the rear
  • the branch 25 should take between one-fifth and one-half of the total flow at maximum designed heat output for preference; in practice the branch has been found to be able with benefit to take more than one-half the maximum total flow.
  • the gas emerges from the box through the passages which serve one as an aerated jet and the other as a non-aerated jet, the aerated jet entering a zone of the material which is well defined between the box and the front of the tray so the aerated gas distribution or port loading is substantially uniform along the zone.
  • the aerated gas burns steadily and has been found to cross- ignite the non-aerated gas without excessive flame roll-over causing an alarming whoosh.
  • the pilot light assembly 13 sticks up in front of the tray and has three orifices, one 31 directed to project a flame onto the surface of the material 22, one 32 to direct a flame onto a piezo-electric igniter 33 and the third 34 to direct a flame towards a flame failure senser 35.
  • the three orifices are disposed to give reliable cross-ignition.
  • the described embodiment has been found to behave surprisingly well.
  • a fire looks realistic burning aerated gas over a range of 12,ooo to 18,ooo B.T.U.'s per hour glowing like a low fire and then an extra 14,ooo to 16,ooo B.T.U's can be progressively added to give the luminous flickering flame of a roaring fire. If the luminous flame tends to bunch due to the suction from the chimney to an artificial looking extent (all coal fires have flames which tend to bunch or cone to some extent but with gas fires simulating solid fuel fires using diffusing material the gas starts bunching lower down within the material), it is possible to compensate by means of a baffle or b baffles to spread the luminous flame across the fire.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP84307798A 1983-11-10 1984-11-12 Appareil de chauffage de locaux Withdrawn EP0145298A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838329992A GB8329992D0 (en) 1983-11-10 1983-11-10 Space heating appliances
GB8329992 1983-11-10

Publications (2)

Publication Number Publication Date
EP0145298A2 true EP0145298A2 (fr) 1985-06-19
EP0145298A3 EP0145298A3 (fr) 1986-11-26

Family

ID=10551550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84307798A Withdrawn EP0145298A3 (fr) 1983-11-10 1984-11-12 Appareil de chauffage de locaux

Country Status (2)

Country Link
EP (1) EP0145298A3 (fr)
GB (2) GB8329992D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228794A (en) * 1990-01-24 1990-09-05 J L B Group Ltd Solid fuel effect gas fire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219391B (en) * 1988-06-06 1992-12-02 Cannon Ind Ltd Charcoal-effect gas grill
GB2345127A (en) * 1998-12-22 2000-06-28 David James Izzard Decorative effect gas fires

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2068106A (en) * 1980-01-19 1981-08-05 Valor Newhome Ltd Solid fuel effect gas fires
GB2081885A (en) * 1980-07-25 1982-02-24 United Gas Industries Ltd Simulated solid fuel gas firée
GB2111671A (en) * 1981-12-11 1983-07-06 Thorn Gas Appliances Limited Solid fuel effect gas fires

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB266152A (en) * 1926-03-19 1927-02-24 South Metropolitan Gas Co Improvements in or relating to gas fires
GB284867A (en) * 1927-02-18 1928-02-09 South Metropolitan Gas Co Improvements in gas fires and the like
GB380352A (en) * 1932-02-15 1932-09-15 South Metropolitan Gas Co Improvements in or relating to gas fires

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2068106A (en) * 1980-01-19 1981-08-05 Valor Newhome Ltd Solid fuel effect gas fires
GB2081885A (en) * 1980-07-25 1982-02-24 United Gas Industries Ltd Simulated solid fuel gas firée
GB2111671A (en) * 1981-12-11 1983-07-06 Thorn Gas Appliances Limited Solid fuel effect gas fires

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228794A (en) * 1990-01-24 1990-09-05 J L B Group Ltd Solid fuel effect gas fire
EP0439346A2 (fr) * 1990-01-24 1991-07-31 Crosslee Plc Foyer à gaz
EP0439346A3 (en) * 1990-01-24 1991-10-16 Crosslee Plc Gas fire
GB2228794B (en) * 1990-01-24 1994-06-29 J L B Group Ltd Gas fire

Also Published As

Publication number Publication date
GB8428485D0 (en) 1984-12-19
GB8329992D0 (en) 1983-12-14
GB2156068A (en) 1985-10-02
GB2156068B (en) 1987-05-07
EP0145298A3 (fr) 1986-11-26

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