GB2123944A - Heating air in fuel-effect gas fires - Google Patents

Heating air in fuel-effect gas fires Download PDF

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Publication number
GB2123944A
GB2123944A GB08221274A GB8221274A GB2123944A GB 2123944 A GB2123944 A GB 2123944A GB 08221274 A GB08221274 A GB 08221274A GB 8221274 A GB8221274 A GB 8221274A GB 2123944 A GB2123944 A GB 2123944A
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GB
United Kingdom
Prior art keywords
fire
skin
unit
flue
heat
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Withdrawn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
GB08221274A
Inventor
Dennis Beardmore
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB08221274A priority Critical patent/GB2123944A/en
Publication of GB2123944A publication Critical patent/GB2123944A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/18—Stoves with open fires, e.g. fireplaces
    • F24B1/185—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion
    • F24B1/188—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas  
    • F24B1/1883—Stoves with open fires, e.g. fireplaces with air-handling means, heat exchange means, or additional provisions for convection heating ; Controlling combustion characterised by use of heat exchange means , e.g. using a particular heat exchange medium, e.g. oil, gas   the heat exchange medium being both water and air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/18—Stoves with open fires, e.g. fireplaces
    • F24B1/1808—Simulated fireplaces
    • 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
    • F24C1/00—Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified
    • F24C1/14—Radiation heating stoves and ranges, with additional provision for convection heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

A fire unit has an inner skin 2 having a top, back and side walls defining a combustion area, a coal-effect gas burner 4, an outer skin 3 defining with the inner skin a flow path 11 for convected air, and a flue outlet 7 from the combustion area which is separated into a plurality of separate flue ways. The fire unit may have a back boiler unit 12 with projecting heat transfer fins 14 and tubes 15 to extract heat from the fire. The fire unit suitably includes a baffle surface or a suitably angled boiler portion 13 in the combustion area which causes the combustion gases to take a serpentine route to the flue outlet. The inner and outer skins may be releasably secured together. <IMAGE>

Description

SPECiFICATiON Improved fire This invention relates to an improved fire primarily coal-effect, gas burning, free flame fire.
At present coal-effect gas burners are available for installation into existing fireplaces but the fires are primarily for aesthetic purposes and do not make the best use of the heat available.
An object of the present invention is to extract more heat from a fire.
According to the present invention a fire unit comprises a first skin defining a combustion area for a fire giving off radiant heat, and a second skin outside the first skin, the first and second skins being spaced apart over at least a portion thereof in order to define an air flow path therebetween for convected air providing addition heat extracted from the fire by heat transfer.
If desired the fire unit may, in addition, include a back boiler unit for the heating of water. Preferably the flue outlet is separated into a plurality of separate flue ways which reduces the flue outlet to the minimum allowable whilst simultaneously providing a large additional transfer area for the convected air.
In accordance with a preferred embodiment of the invention a fire unit comprises an inner skin having top, back and side walls defining a combustion area, a coal-effect gas burner within the combustion area, an outer skin surrounding the inner skin and defining therebetween a flow path for convected air, an inlet to the flow path at the bottom of the fire unit and an outlet from the flow path at the top of the fire unit.
Suitably the inner and outer skins are releasably secured together so that the individual parts may be replaced. In the preferred arrangements the combustion area may include a baffle surface causing the combustion gases to take a serpentine route to the flue outlet.
The invention will now be described by way of example with reference to the accompanying diagrammatic drawings in which: Figure 1 is a front view of a first embodiment of fire in accordance with the present invention; Figure 2 is an end section of the fire shown in Figure 1; Figure 3 is a front view of a second embodiment of fire in accordance with the present invention; Figure 4 is an end section of the fire shown in Figure 3 and; Figure 5 is a top view of the fire shown in Figure 3.
In the drawings of the first embodiment a fire 1 has an inner skin 2 and a separate outer skin 3. The inner skin 2 has top, bottom, back and side walls defining a fire chamber which receives a coal-effect gas burner 4, suitably as manufactured by Kohlangaz Ltd., having radiant coal elements 6. The bottom wall of the inner skin 2 is broken away so as to permit the necessary secondary air flow to pass to the burner through air inlet 6.
The top wall of the inner skin 2 has three projecting 3" diameter flue outlets 7 with a seal plate 8 secured intermediate the ends thereof. The com- bustion gases pass through the outlets 7 and are caused to take a serpentine route indicated by arrow 18 by means of the positioning og a baffle plate 9.
The baffle plate 9 helps throw heat into the room rather than it passing directly up the flue outlets 7.
The outer skin 3 is spaced from the inner skin 2 by means of spacer members 10 so as to provide a convection path 11 for air suitably of 2" minimum width. The outer skin 3 is releasably locked to the inner skin 2 by means of a brass front plate 12 which is slidable into the juxtaposed side and top walls of the inner and outer skins in the direction of the flue outlets. In order to seal the flue outlet the spacer member 10 are adjustable in order to press the seal plate 8 tightly against the flue outlet in the outler skin as shown in Figure 2. The seal is completed by an asbestos rope gasket (not shown) therebetween.
As the inner skin 2 and outer skin 3 are separate the inner skin 2 may be replaced if necessary without the whole fire being replaced. Moreover, the flue outlets 7 provide additional heat transfer elements for the convection air as well as reducing the total area of the flue outlet to 30 square inches being the minimum requirement for 30,000 Btu gas appliances with a burning free flame fire.
In use radiant heat is given off by the radiant coals 5 heated by the gas flames and convected heat is given off by air being drawn into the convection path 11 and heated by heat transfer through the inner skin 2 which is preferably 1/8 plate. Figures 3,4 and 5 show a similar arrangement and the same reference numerals have been used for corresponding parts.
However, the fire of this second embodiment has a 40,000 Btu water boiler 12 positioned against the back wall of the inner skin 2. The back boiler unit 12 has an angled upper portion 13 providing a similar function to the baffle plate 9 whilst simultaneously extracting direct heat from the gas flames by conduction to heat up the water within the boiler.
Further heat is extracted by means of heat transfer fins 14 and heat transfer tubes 15 which are positioned within the coals 5 themselves.
The boiler connections 16 are preferably provided in duplicate, are set at each side to facilitate fixture as desired according to whether left or right hand side fittings are required. The hot water provided may be for direct use and/or for heating radiators.
The flue outlets 7 are slightly different from the first embodiment in that fire outlets of rectangular cross-section are provided to reduce the flue outlet to a total of 40 square inches which is the minimum requirement a fire of up to 40,000 Btu capacity.
The present invention enables the maximum amount of heat to be extracted from a gas flame coal effect fire which has previously been used primarily for aesthetic purposes only. Moreover the modular construction provides for simple assembly and part replacement.
CLAIMS (Filed on 21 July 1983) 1. A fire unit comprises a first skin defining a combustion area for a fire giving off radiant heat, a second skin outside the first skin, the first and second skins being spaced apart over at least a
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (10)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECiFICATiON Improved fire This invention relates to an improved fire primarily coal-effect, gas burning, free flame fire.
    At present coal-effect gas burners are available for installation into existing fireplaces but the fires are primarily for aesthetic purposes and do not make the best use of the heat available.
    An object of the present invention is to extract more heat from a fire.
    According to the present invention a fire unit comprises a first skin defining a combustion area for a fire giving off radiant heat, and a second skin outside the first skin, the first and second skins being spaced apart over at least a portion thereof in order to define an air flow path therebetween for convected air providing addition heat extracted from the fire by heat transfer.
    If desired the fire unit may, in addition, include a back boiler unit for the heating of water. Preferably the flue outlet is separated into a plurality of separate flue ways which reduces the flue outlet to the minimum allowable whilst simultaneously providing a large additional transfer area for the convected air.
    In accordance with a preferred embodiment of the invention a fire unit comprises an inner skin having top, back and side walls defining a combustion area, a coal-effect gas burner within the combustion area, an outer skin surrounding the inner skin and defining therebetween a flow path for convected air, an inlet to the flow path at the bottom of the fire unit and an outlet from the flow path at the top of the fire unit.
    Suitably the inner and outer skins are releasably secured together so that the individual parts may be replaced. In the preferred arrangements the combustion area may include a baffle surface causing the combustion gases to take a serpentine route to the flue outlet.
    The invention will now be described by way of example with reference to the accompanying diagrammatic drawings in which: Figure 1 is a front view of a first embodiment of fire in accordance with the present invention; Figure 2 is an end section of the fire shown in Figure 1; Figure 3 is a front view of a second embodiment of fire in accordance with the present invention; Figure 4 is an end section of the fire shown in Figure 3 and; Figure 5 is a top view of the fire shown in Figure 3.
    In the drawings of the first embodiment a fire 1 has an inner skin 2 and a separate outer skin 3. The inner skin 2 has top, bottom, back and side walls defining a fire chamber which receives a coal-effect gas burner 4, suitably as manufactured by Kohlangaz Ltd., having radiant coal elements 6. The bottom wall of the inner skin 2 is broken away so as to permit the necessary secondary air flow to pass to the burner through air inlet 6.
    The top wall of the inner skin 2 has three projecting 3" diameter flue outlets 7 with a seal plate 8 secured intermediate the ends thereof. The com- bustion gases pass through the outlets 7 and are caused to take a serpentine route indicated by arrow
    18 by means of the positioning og a baffle plate 9.
    The baffle plate 9 helps throw heat into the room rather than it passing directly up the flue outlets 7.
    The outer skin 3 is spaced from the inner skin 2 by means of spacer members 10 so as to provide a convection path 11 for air suitably of 2" minimum width. The outer skin 3 is releasably locked to the inner skin 2 by means of a brass front plate 12 which is slidable into the juxtaposed side and top walls of the inner and outer skins in the direction of the flue outlets. In order to seal the flue outlet the spacer member 10 are adjustable in order to press the seal plate 8 tightly against the flue outlet in the outler skin as shown in Figure 2. The seal is completed by an asbestos rope gasket (not shown) therebetween.
    As the inner skin 2 and outer skin 3 are separate the inner skin 2 may be replaced if necessary without the whole fire being replaced. Moreover, the flue outlets 7 provide additional heat transfer elements for the convection air as well as reducing the total area of the flue outlet to 30 square inches being the minimum requirement for 30,000 Btu gas appliances with a burning free flame fire.
    In use radiant heat is given off by the radiant coals 5 heated by the gas flames and convected heat is given off by air being drawn into the convection path 11 and heated by heat transfer through the inner skin 2 which is preferably 1/8 plate. Figures 3,4 and 5 show a similar arrangement and the same reference numerals have been used for corresponding parts.
    However, the fire of this second embodiment has a 40,000 Btu water boiler 12 positioned against the back wall of the inner skin 2. The back boiler unit 12 has an angled upper portion 13 providing a similar function to the baffle plate 9 whilst simultaneously extracting direct heat from the gas flames by conduction to heat up the water within the boiler.
    Further heat is extracted by means of heat transfer fins 14 and heat transfer tubes 15 which are positioned within the coals 5 themselves.
    The boiler connections 16 are preferably provided in duplicate, are set at each side to facilitate fixture as desired according to whether left or right hand side fittings are required. The hot water provided may be for direct use and/or for heating radiators.
    The flue outlets 7 are slightly different from the first embodiment in that fire outlets of rectangular cross-section are provided to reduce the flue outlet to a total of 40 square inches which is the minimum requirement a fire of up to 40,000 Btu capacity.
    The present invention enables the maximum amount of heat to be extracted from a gas flame coal effect fire which has previously been used primarily for aesthetic purposes only. Moreover the modular construction provides for simple assembly and part replacement.
    CLAIMS (Filed on 21 July 1983) 1. A fire unit comprises a first skin defining a combustion area for a fire giving off radiant heat, a second skin outside the first skin, the first and second skins being spaced apart over at least a portion thereof in order to define an air flow path therebetween for convected air providing additional heat extracted from the first by heat transfer, and a flue outlet from the combustion area which passes through the airflow path between the first and second skins, the flue outlet being separated into a plurality of separate flue ways to provide a large heat transfer area for the convected air passing through the air flow path.
  2. 2. Afire unit according to claim 1 wherein the inner and outer skins are releasably secured together so that the individual parts may be replaced if required.
  3. 3. A fire unit according to claim 1 or 2 wherein the combustion area includes a baffle surface causing the combustion gases to take a serpentine route to the flue outlet.
  4. 4. A fire unit according to any one of the preceding claims wherein the fire unit includes a back boiler unit for the heating of water.
  5. 5. Afire unit according to claim 4wherein the back boiler unit is disposed at the back of the combustion area and includes an angled upper portion providing a baffle surface in the path of combustion gases escaping to the flue outlet.
  6. 6. Afire unit according to claim 4 or 5 wherein the back boiler unit includes heat transfer fins on a surface of the boiler unit to be exposed to the fire.
  7. 7. Afire unit according to claim 4,5 or 6 wherein the back boiler unit includes heat transfer tubes disposed so as to be positioned with the fire itself.
  8. 8. Afire unit according to any one of the preceding claims wherein the flue ways are secured to the inner skin and have a seal plate positioned intermediate the ends thereof, the spacing between the inner and outer skins being adjustable in orderto press the seal plate tightly against the outer skin.
  9. 9. Afire unit comprising an inner skin having top, back and side walls defining a combustion area, a coal-effect gas burner within the combustion area, an outer skin surrounding the inner skin and defining therebetween a flow path for convected air, an inlet to the flow path at the bottom of the fire unit and an outlet from the flow path at the top of the fire unit.
  10. 10. Afire unit substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB08221274A 1982-07-22 1982-07-22 Heating air in fuel-effect gas fires Withdrawn GB2123944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08221274A GB2123944A (en) 1982-07-22 1982-07-22 Heating air in fuel-effect gas fires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08221274A GB2123944A (en) 1982-07-22 1982-07-22 Heating air in fuel-effect gas fires

Publications (1)

Publication Number Publication Date
GB2123944A true GB2123944A (en) 1984-02-08

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GB08221274A Withdrawn GB2123944A (en) 1982-07-22 1982-07-22 Heating air in fuel-effect gas fires

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177490A (en) * 1985-06-17 1987-01-21 Taylor Economic Limited Heating air in fuel-effect gas fires
GB2180333A (en) * 1985-08-28 1987-03-25 Thomas Raymond Collier Convection air heating in simulated solid fuel gas fires
GB2197451A (en) * 1986-11-14 1988-05-18 Valor Heating Ltd Gas fires
GB2238607A (en) * 1989-12-01 1991-06-05 Brannan Heat Projects Limited Solid fuel or gas-fired convection heating fitting
GB2286661A (en) * 1994-02-16 1995-08-23 Jetmaster Fires Ltd Fireplace appliance convector box
US6237588B1 (en) * 2000-03-14 2001-05-29 Heat-N-Glo Fireplace Products, Inc. Outdoor convertible wood burning fireplace
EP1734303A3 (en) * 2005-06-17 2008-04-23 Famaritl (Innovation Technology Lab) S.R.L. Pellet boiler with high energy recovery

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB576816A (en) * 1944-08-02 1946-04-18 South Metropolitan Gas Co Improvements in or relating to gas fires
GB742353A (en) * 1953-12-29 1955-12-21 Richard William Gaussen Love Improved air-heating apparatus
GB781179A (en) * 1954-05-18 1957-08-14 Arthur Frederick Oatley Improvements relating to space heaters
GB808358A (en) * 1954-05-04 1959-02-04 William Sugg & Company Ltd Improvements in and relating to gas fires
GB877953A (en) * 1959-03-06 1961-09-20 Gratzmuller Jean Louis Improvements in control systems for hydraulic actuators
GB925365A (en) * 1960-09-30 1963-05-08 Eric Clifford Turner Space heating appliance
GB1095644A (en) * 1965-02-16 1967-12-20 Kenneth Reginald Beetlestone Improvements in domestic fireplaces
GB2053443A (en) * 1979-06-04 1981-02-04 Mitchell D A Heating air in incandescent gas fires

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB576816A (en) * 1944-08-02 1946-04-18 South Metropolitan Gas Co Improvements in or relating to gas fires
GB742353A (en) * 1953-12-29 1955-12-21 Richard William Gaussen Love Improved air-heating apparatus
GB808358A (en) * 1954-05-04 1959-02-04 William Sugg & Company Ltd Improvements in and relating to gas fires
GB781179A (en) * 1954-05-18 1957-08-14 Arthur Frederick Oatley Improvements relating to space heaters
GB877953A (en) * 1959-03-06 1961-09-20 Gratzmuller Jean Louis Improvements in control systems for hydraulic actuators
GB925365A (en) * 1960-09-30 1963-05-08 Eric Clifford Turner Space heating appliance
GB1095644A (en) * 1965-02-16 1967-12-20 Kenneth Reginald Beetlestone Improvements in domestic fireplaces
GB2053443A (en) * 1979-06-04 1981-02-04 Mitchell D A Heating air in incandescent gas fires

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177490A (en) * 1985-06-17 1987-01-21 Taylor Economic Limited Heating air in fuel-effect gas fires
GB2180333A (en) * 1985-08-28 1987-03-25 Thomas Raymond Collier Convection air heating in simulated solid fuel gas fires
GB2197451A (en) * 1986-11-14 1988-05-18 Valor Heating Ltd Gas fires
EP0267746A2 (en) * 1986-11-14 1988-05-18 Valor Heating Limited Improvements relating to gas fires
EP0267746A3 (en) * 1986-11-14 1989-10-04 Valor Heating Limited Improvements relating to gas fires
GB2238607A (en) * 1989-12-01 1991-06-05 Brannan Heat Projects Limited Solid fuel or gas-fired convection heating fitting
GB2238607B (en) * 1989-12-01 1993-11-24 Brannan Heat Projects Limited Improvements in or relating to a fitting for a fireplace
GB2286661A (en) * 1994-02-16 1995-08-23 Jetmaster Fires Ltd Fireplace appliance convector box
US6237588B1 (en) * 2000-03-14 2001-05-29 Heat-N-Glo Fireplace Products, Inc. Outdoor convertible wood burning fireplace
EP1734303A3 (en) * 2005-06-17 2008-04-23 Famaritl (Innovation Technology Lab) S.R.L. Pellet boiler with high energy recovery

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