EP0235995A1 - Foyers - Google Patents

Foyers Download PDF

Info

Publication number
EP0235995A1
EP0235995A1 EP87301295A EP87301295A EP0235995A1 EP 0235995 A1 EP0235995 A1 EP 0235995A1 EP 87301295 A EP87301295 A EP 87301295A EP 87301295 A EP87301295 A EP 87301295A EP 0235995 A1 EP0235995 A1 EP 0235995A1
Authority
EP
European Patent Office
Prior art keywords
fuel
firebox
support portion
oxygen
area
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Withdrawn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
EP87301295A
Other languages
German (de)
English (en)
Inventor
John Stuart Fleming
Allan Leslie Goldsack
Walter Wing
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.)
KENT HEATING Ltd
Original Assignee
KENT HEATING 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 KENT HEATING Ltd filed Critical KENT HEATING Ltd
Publication of EP0235995A1 publication Critical patent/EP0235995A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F24B13/00—Details solely applicable to stoves or ranges burning solid fuels 
    • F24B13/02—Arrangement or mountings of fire-grate assemblies; Arrangement or mountings of linings for fire-boxes, e.g. fire-backs 
    • 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
    • F24B5/00—Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/021—Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves combustion-air circulation

Definitions

  • This invention relates to heating apparatus and more particularly to improvements in fireboxes for such heating assemblies.
  • solid fuel heating apparatus have generally been provided either for burning low density fuels such as wood, wood products, wood by-products, briquettes and similar material or alternatively, for burning high density fuels such as coal, coke, coal or coke based products and like fossil fuels.
  • low density fuels such as wood, wood products, wood by-products, briquettes and similar material
  • high density fuels such as coal, coke, coal or coke based products and like fossil fuels.
  • High density fuels generally require greater quantities of oxygen for complete combustion and also have a substantially higher heat output for a given volume than that of the lower density fuels. Of itself, this dictates certain firebox design requirements, rendering a solid fuel heater suitable for low density fuels generally almost useless for the efficient burning of high density fuels and vice versa.
  • a firebox for a solid fuel heating apparatus having a fuel support portion for supporting solid fuel thereon, said fuel support portion having an apertured portion therein able to be fed with oxygen from beneath, said apertured portion of a size smaller than that of the fuel support portion to limit the maximum combustion level of fuel supported thereon.
  • the firebox assembly of this invention as generally indicated by arrow 1 is preferably formed in suitable material for example relatively high temperature resistant robust material such as mild steel plate and the like however, the invention is not limited to these materials and alternative materials having the necessary properties of inherent strength, robustness and resistence to temperature can be utilised.
  • the firebox 1 is formed as a substantially enclosed firebox having a floor 2, side walls 3 and a roof 4 and preferably, although not essentially incorporating a baffle 5 to create a labyrinth to a flue 6 for exhaustion of the products of combustion.
  • a side wall 3a defining the front of the firebox incorporates a door 7 which is openable to expose an opening for access to the interior of the firebox 1 such as for the installation of fuel and tending the fire or the products of combustion.
  • An oxygen inlet 8 is preferably provided in the firebox 1 adjacent the front wall 3a and the inlet 8 communicates with a manifold 9 which preferably extends across an upper front portion and down interior corners of the firebox 1, terminating in communication with a pit 10 situated beneath a front portion of the floor 2 of the firebox 1.
  • the manifold 9 is provided with ports 11 and 12 which enable communication between, in the first instance, the interi cr of the firebox 1 above the floor 2 and in the second instance, the pit 10.
  • a movable slide 13 is mounted adjacent the ports 11 and 12, the slide 13 in itself having a slide port 14 which is alignable with either one or the other of the ports 11 and 12 so as to control oxygen flow from the inlet 8 to the firebox either via the port 12 into the pit 10 or alternatively, through both ports 11 and 12.
  • FIG. 2 shows the two positions for the slide 13 in this form of the invention, Figure 2 showing the slide 13 in a raised position whereby the slide port 14 substantially aligns with the port 11 and enables communication between the manifold 9 and the interior of the firebox 1 via the exposed port 11 and additionally with the pit 10 via the port 12.
  • Figure 3 it will be seen that the slide 13 is in the lowered position and the slide port 14 aligns with the port 12 enabling communication between the manifold 9 and pit 10 whereas non-apertured portions of the slide 13 close the port 11.
  • Movement of the slide 13 is via handle means 15 and preferably suitable detents are provided to assist in convenient alignment of the slide port 14 with the ports 11 and 12 as may be required.
  • the floor portion 2 of the firebox is provided with an apertured portion as generally indicated by arrow 16.
  • the apertured portion 16 is provided in the manner of a grating and is positioned substantially medially above the pit 10 and preferably substantially behind the openable door 7.
  • a closeable opening 17 is provided in the lower front wall 3a of the firebox 2 so as to enable access to at least mid portions of the pit 10 and for removal of ash and clinker and other by-products of combustion from the pit 10.
  • the remaining portions of the floor 2 are provided in non-apertured material such as metal plate and the like and these are sloped downwardly from side walls 3 of the firebox 1 toward the apertured portion 16 although this is not essential to the invention and in alternative embodiments of the invention, the remaining floor portions 2 can be provided in a substantially planar or non-sloping manner, however, the preferred form of the invention incorporates sloping floor portions 2.
  • the area of the apertured portion 16 approximates 30 % of the area of the floor 2 of the firebox.
  • the apertured portion 16 is constructed to be approximately 20 to 40 % of the area of the floor 2 of the firebox however, in further alternative forms of the invention, the apertured area does not exceed 60 % of the total area of the floor portion 2, it will be appreciated that the greater the density of the high density fuel to be burnt the smaller the grate area in relation to the remaining area of the floor 2.
  • riddling means (not shown) is provided the association with the apertured portion 16, this preferably in the form of vibrating or raking means which vibrate or rake between elements of the apertured portion 16 and remove ash therefrom and also from about burning fuel there adjacent.
  • the ash falls into the pit 10 for removal and improves combustion of the fuel adjacent the grate.
  • low density fuel such as logs of wood are inserted into the firebox 1 and are rested upon the floor 2.
  • a substantially large charge of low density fuel can be placed into the firebox and combustion is controlled by controlling inlet air or oxygen into the firebox and by moving the slide 13 to the upper position whereby oxygen can flow to the fuel both above the floor 2 and the grate via the port 12 and furthermore, through the port 12 and via the pit 10 and apertured portion 16.
  • the restricted size of the apertured portion 15 relative to the overall area of the firebox floor restricts the amount of fuel which can combust at any one time and thus restricts an accidental runaway of the heat output of the heater should too much oxygen be supplied to the charge of fuel in the firebox and combustion occur over the whole charge.
  • the area relationship in the preferred embodiment of the invention of the apertured portion 16 to the floor area of the firebox 2 is in the preferred form of the invention between 20 and 40%. This roughly equates the maximum heat output achieved with a normal charge of low density fuel such as wood logs which substantially and conveniently fill the firebox with that of a charge of high density fuel such as coal or coke or other fossil fuel which is able to burn over the apertured portion 16. Thus, generally equivalent maximum heat outputs are achieved on combustion in the firebox of both low and high density fuels. It will be appreciated that there is no need to modify or alter the actual construction of the firebox when changing from one firing mode to the other, only change the slide 13 of the oxygen supply.
EP87301295A 1986-02-14 1987-02-16 Foyers Withdrawn EP0235995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ215171 1986-02-14
NZ21517186 1986-02-14

Publications (1)

Publication Number Publication Date
EP0235995A1 true EP0235995A1 (fr) 1987-09-09

Family

ID=19921559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87301295A Withdrawn EP0235995A1 (fr) 1986-02-14 1987-02-16 Foyers

Country Status (2)

Country Link
EP (1) EP0235995A1 (fr)
AU (1) AU6878387A (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169457A (en) * 1975-09-22 1979-10-02 Shenandoah Manufacturing Co., Inc. Thermostatically regulated space heaters for burning wood, coal and the like
DE2917917A1 (de) * 1979-05-03 1980-12-11 Kainz Alois Ofen fuer feste brennstoffe
US4321879A (en) * 1978-06-12 1982-03-30 Toivo Auvo As Furnace for consuming solid fuel
FR2556079A1 (fr) * 1983-12-06 1985-06-07 Boidron Michel Poele generateur d'air chaud realisable a l'aide de modules de fonte moulee sans noyautage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169457A (en) * 1975-09-22 1979-10-02 Shenandoah Manufacturing Co., Inc. Thermostatically regulated space heaters for burning wood, coal and the like
US4321879A (en) * 1978-06-12 1982-03-30 Toivo Auvo As Furnace for consuming solid fuel
DE2917917A1 (de) * 1979-05-03 1980-12-11 Kainz Alois Ofen fuer feste brennstoffe
FR2556079A1 (fr) * 1983-12-06 1985-06-07 Boidron Michel Poele generateur d'air chaud realisable a l'aide de modules de fonte moulee sans noyautage

Also Published As

Publication number Publication date
AU6878387A (en) 1987-08-20

Similar Documents

Publication Publication Date Title
US6223737B1 (en) Pellet fuel burning device
US5893358A (en) Pellet fuel burner for heating and drying systems
US4989521A (en) Gravity fed pellet burner
US5941234A (en) Combustion cage for wood pellet and other solid fuel combustion
US5347977A (en) Combination of a baking oven and a stove
US5170724A (en) Burning apparatus having burn promoting plate
CA1162791A (fr) Appareil de chauffage
US4484530A (en) Dual stage combustion furnace
US4347831A (en) Fuel burning stove
US4292933A (en) Furnace
GB2072831A (en) Supplying secondary combustion air
US4502462A (en) Wood stove
EP0235995A1 (fr) Foyers
US6102032A (en) Fire log arrangement
US4257391A (en) Stepped concentric fire grate
US4278067A (en) Furnace
RU2011927C1 (ru) Печь
JPS62210305A (ja) 燃焼装置
US20080295824A1 (en) Woodburner Insert
JPH0412332Y2 (fr)
CN214840985U (zh) 一种生物质压块烤火炉
JP6756963B1 (ja) ペレット燃焼器、及びペレット用ストーブ
CN211781237U (zh) 高原班用新型取暖炉
KR200167565Y1 (ko) 자동투입 연속 연소형 석탄보일러
JPH0212404Y2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880310

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FLEMING,JOHN STUART

Inventor name: WING,WALTER

Inventor name: GOLDSACK,ALLAN LESLIE