CA2008981C - Solid fuel stove - Google Patents
Solid fuel stoveInfo
- Publication number
- CA2008981C CA2008981C CA 2008981 CA2008981A CA2008981C CA 2008981 C CA2008981 C CA 2008981C CA 2008981 CA2008981 CA 2008981 CA 2008981 A CA2008981 A CA 2008981A CA 2008981 C CA2008981 C CA 2008981C
- Authority
- CA
- Canada
- Prior art keywords
- combustion
- combustion chamber
- residues
- solid fuel
- air
- 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.)
- Expired - Fee Related
Links
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
- 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
- F24B5/025—Supply of secondary air for completing combustion of fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
A B S T R A C T
SOLID FUEL STOVE
A solid fuel stove includes a number of features which co-operate to enhance combustion of solid fuel combustion residues, including; air ducting for receiving ambient air, heating the air, and delivering the heated air into the path of the combustion residues; a baffle for restricting the outlet from the combustion chamber, but operable to deflect combustion residues through the outlet when the stove door is open; and a secondary combustion chamber in the flow path of the residues.
Fig. 2
SOLID FUEL STOVE
A solid fuel stove includes a number of features which co-operate to enhance combustion of solid fuel combustion residues, including; air ducting for receiving ambient air, heating the air, and delivering the heated air into the path of the combustion residues; a baffle for restricting the outlet from the combustion chamber, but operable to deflect combustion residues through the outlet when the stove door is open; and a secondary combustion chamber in the flow path of the residues.
Fig. 2
Description
SOLID FUEL STOvE
The present invention relates to solid fuel stoves.
Solid fuel stoves emit a mixture of hot air, solid particles and volatilised gases to the atmosphere. The latter two combustion residues contribute to environmental pollution.
It is an object of the present invention to provide a solid fuel stove in which the amount of environmental pollution emitted is reduced relative to that emitted by a traditional stove.
, 10 The present invention provides a solid fuel stove comprising: (a) a combustion chamber and a door for allowing access to said chamber, said co~bustion chamber including a primary combustion chamber having an outlet for smoke and solid fuel combustion residues and a secondary combustion chamber which is located downstream of said outlet; (b) combustion improvement means for heating ambient air and introducing the heated air into the flow path of the solid fuel combustion residues to enhance combustion of the residues; and (c) a baffle disposed between said primary and secondary combustion - 20 chambers, said baffle being movable between a first position, in which it restricts said outlet so that in use it restricts the outflow af the combustion residues and thereby enhances combustion thereof, and a second position in which said baffle diverts flow towards said outlet so that in use it deflects the combustion residues through said outlet, said baffle being ~L
qF
i ~
: :, ;, ... . . ..... . ... . . ..
-: . :: - - . .
The present invention relates to solid fuel stoves.
Solid fuel stoves emit a mixture of hot air, solid particles and volatilised gases to the atmosphere. The latter two combustion residues contribute to environmental pollution.
It is an object of the present invention to provide a solid fuel stove in which the amount of environmental pollution emitted is reduced relative to that emitted by a traditional stove.
, 10 The present invention provides a solid fuel stove comprising: (a) a combustion chamber and a door for allowing access to said chamber, said co~bustion chamber including a primary combustion chamber having an outlet for smoke and solid fuel combustion residues and a secondary combustion chamber which is located downstream of said outlet; (b) combustion improvement means for heating ambient air and introducing the heated air into the flow path of the solid fuel combustion residues to enhance combustion of the residues; and (c) a baffle disposed between said primary and secondary combustion - 20 chambers, said baffle being movable between a first position, in which it restricts said outlet so that in use it restricts the outflow af the combustion residues and thereby enhances combustion thereof, and a second position in which said baffle diverts flow towards said outlet so that in use it deflects the combustion residues through said outlet, said baffle being ~L
qF
i ~
: :, ;, ... . . ..... . ... . . ..
-: . :: - - . .
connected to said door, whereby movement of said door results in corresponding movement of said baffle so that when said door ; is opened, said baffle is moved relative to said outlet so as S to prevent the combustion residues escaping from the stove when the door is open.
Preferably, the combustion improvement means comprises air ,~ ducting which extends from an ambient air inlet, through a ; heating zone in the combustion chamber for heating the ambient , 10 air, to air outlets into the primary combustion chamber whereby 3 combustion in said primary combustion chamber is enhanced by the provision of heated combustion air.
Advantageously, the air ducting includes outlets into the secondary combustion chamber to enhance combustion of residues in that region.
Conveniently, the secondary combustion chamber is in thermal communication with the primary combustion chamber below and thermally insulated above so that in operation a high temperature prevails.
The invention will now be described more particularly with reference to the accompanying drawings which show, by way of example only, one construction of stove according to the invention. In the drawings:
` Figure 1 is a perspective view of the stove;
Figure 2 is a sectional side elevation of the stove: and Figure 3 is an enlarged view of a detail of Figure 2.
., , ., ., :
- 2(a) -Referring to the drawings, and in particular to Figures 1 and 2, the stove comprises the usual conventional components such as a glass door 1 at the front thereof, a screw adjustable S a ir i~l et 2 ~Cc~ve the / /
/
.; .. :
. ~
-2(~ 8981 glass door l, a primary combustion chamber 3, and an outlet passageway 4 for combu~tion resldues from the primary combustion chambex 3, The direction of flow of - the hot air and residues within the stove is ~ndicated by arrows.
To reduce the amount of pollution being emitted to the atmosphere it is desirable that the residues from the - primary combustion chamber 3 should be subject to as much combustion as possible. The novel feature~ provided in 10 the stove to achieve additional combustion, and the operatlon of the stove, will now be described in more detail.
J ~ot air and combustion residues rise up to the upper region of the primary combustion chamber 3. A high temperature prevails ln this upper region, because the upper reglon is directly above the fire. Furthermore, an ; air ducting system 5 is provided which includes an air inlet Sa for ambient air and air outlets 5b to the upper region. Air enter~ the inlet Sa, i5 superheated in the air ducting system 5, rlses up the air ducting ~ystem 5 by convective flow, and is emitted through the ports 5b into the upper region of the prlmary combustion zone.
Introduction of this superheated air enhances combustion.
~y~ The hot air and combustion residues then flow out of the primary combustion chamber 3 through the restricted ... .
r~
~ , . -outlet 6 defined by the fixed plate 7 and the baffle 8.
Because of the restrictive nature of the outlet 6 the residues spend a longer time in the primary combustion chamber 3, thereby further enhancing combustion.
The air and combustion residues then enter a secondary combustion chamber 9, shown on a larger scale in ~igure 3. A high temperature prevails in thi~ secondary combustion chamber 9 firstly because it is directly over the fire in the primary combustion chamber 3 and in 0 thermal contact therewith, secondly because the secondary combustion chamber 9 is very well insulated above by ceramic wool lining 20, and thirdly because of the ; introduction of heated air from the ducting system through the nozzle 5b. Further combustion of the residuec takes place in the secondary combustion chamber 9.
Finally the residues are exhausted to the atmosphere through the flue 10, shown only in Figure 2.
To add extra fuel the glass door 1 is opened. As the glass door 1 opens the baffle 8 pivots downwardly ~o that when the glass door 1 ls fully open the baffle 8 no longer restricts the outlet 6 from the primary combustion chamber 3 but instead positively deflects combustion residues through the outlet 6. It will be seen that in this situation the baffle 8 extends well below the level of the outlet 6. The purpose of this arrangement is to prevent :`
- . . , ~ . ~ ~- , 200898~
Preferably, the combustion improvement means comprises air ,~ ducting which extends from an ambient air inlet, through a ; heating zone in the combustion chamber for heating the ambient , 10 air, to air outlets into the primary combustion chamber whereby 3 combustion in said primary combustion chamber is enhanced by the provision of heated combustion air.
Advantageously, the air ducting includes outlets into the secondary combustion chamber to enhance combustion of residues in that region.
Conveniently, the secondary combustion chamber is in thermal communication with the primary combustion chamber below and thermally insulated above so that in operation a high temperature prevails.
The invention will now be described more particularly with reference to the accompanying drawings which show, by way of example only, one construction of stove according to the invention. In the drawings:
` Figure 1 is a perspective view of the stove;
Figure 2 is a sectional side elevation of the stove: and Figure 3 is an enlarged view of a detail of Figure 2.
., , ., ., :
- 2(a) -Referring to the drawings, and in particular to Figures 1 and 2, the stove comprises the usual conventional components such as a glass door 1 at the front thereof, a screw adjustable S a ir i~l et 2 ~Cc~ve the / /
/
.; .. :
. ~
-2(~ 8981 glass door l, a primary combustion chamber 3, and an outlet passageway 4 for combu~tion resldues from the primary combustion chambex 3, The direction of flow of - the hot air and residues within the stove is ~ndicated by arrows.
To reduce the amount of pollution being emitted to the atmosphere it is desirable that the residues from the - primary combustion chamber 3 should be subject to as much combustion as possible. The novel feature~ provided in 10 the stove to achieve additional combustion, and the operatlon of the stove, will now be described in more detail.
J ~ot air and combustion residues rise up to the upper region of the primary combustion chamber 3. A high temperature prevails ln this upper region, because the upper reglon is directly above the fire. Furthermore, an ; air ducting system 5 is provided which includes an air inlet Sa for ambient air and air outlets 5b to the upper region. Air enter~ the inlet Sa, i5 superheated in the air ducting system 5, rlses up the air ducting ~ystem 5 by convective flow, and is emitted through the ports 5b into the upper region of the prlmary combustion zone.
Introduction of this superheated air enhances combustion.
~y~ The hot air and combustion residues then flow out of the primary combustion chamber 3 through the restricted ... .
r~
~ , . -outlet 6 defined by the fixed plate 7 and the baffle 8.
Because of the restrictive nature of the outlet 6 the residues spend a longer time in the primary combustion chamber 3, thereby further enhancing combustion.
The air and combustion residues then enter a secondary combustion chamber 9, shown on a larger scale in ~igure 3. A high temperature prevails in thi~ secondary combustion chamber 9 firstly because it is directly over the fire in the primary combustion chamber 3 and in 0 thermal contact therewith, secondly because the secondary combustion chamber 9 is very well insulated above by ceramic wool lining 20, and thirdly because of the ; introduction of heated air from the ducting system through the nozzle 5b. Further combustion of the residuec takes place in the secondary combustion chamber 9.
Finally the residues are exhausted to the atmosphere through the flue 10, shown only in Figure 2.
To add extra fuel the glass door 1 is opened. As the glass door 1 opens the baffle 8 pivots downwardly ~o that when the glass door 1 ls fully open the baffle 8 no longer restricts the outlet 6 from the primary combustion chamber 3 but instead positively deflects combustion residues through the outlet 6. It will be seen that in this situation the baffle 8 extends well below the level of the outlet 6. The purpose of this arrangement is to prevent :`
- . . , ~ . ~ ~- , 200898~
combustion re~idues escaping from the primary combustion ; chamber 3 into the room when the glass door 1 is open.
In order to achieve efficient combustion, the stove is well insulated. The two side walls are each lined with S a sheet of ~irebrick (not shown) extending the full height of the stove. Ceramic wool lining (not shown) i8 also provided between the flrebrick and the sidewalls, extending from the bottom of the stove to half the height thereof.
1G A further desirable feature of the stove, from the ' point of view of cleanliness, is that air entering the stove through the ad~ustable air inlet 2 passes across the inside face of the glass door l and thereby keeps the inside face clean.
A still further desirable feature of the stove, also from the point of view of cleanlines~, is that a shutter 14 is provided between the primary combustion chamber 3 and the aæh tray 15 and ash box 16. The shutter 14 is opened from time to time to release accumul~ted ashes from the prlmary comhustion chamber 3 into the ash tray 15 and ash box 16, and is then shut again. The ash tray 15 and ash box 16 are emptied by opening the ash pit door 17 and withdrawlng the ash tray and ash box. The ash pit door 17 i5 opened, however, only when the shutter 14 is closed and the ashes have settled in the ash tray 15 and ash box 16.
-. ,. ~ . ~ ; , ....
:::
Z00898~
. - 6 - .
:, In this way there ls less likelihood of loose ashes blowing about the room. The shutter 14 is operated by means of a lever (not shown) at one side of the stove.
The stove, including air ducting 5, is made of cast .~ 5 iron.
'' :;
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., , , ~ .
'J
.:~
S I
.,", . ' ~
~., ,,, .,
In order to achieve efficient combustion, the stove is well insulated. The two side walls are each lined with S a sheet of ~irebrick (not shown) extending the full height of the stove. Ceramic wool lining (not shown) i8 also provided between the flrebrick and the sidewalls, extending from the bottom of the stove to half the height thereof.
1G A further desirable feature of the stove, from the ' point of view of cleanliness, is that air entering the stove through the ad~ustable air inlet 2 passes across the inside face of the glass door l and thereby keeps the inside face clean.
A still further desirable feature of the stove, also from the point of view of cleanlines~, is that a shutter 14 is provided between the primary combustion chamber 3 and the aæh tray 15 and ash box 16. The shutter 14 is opened from time to time to release accumul~ted ashes from the prlmary comhustion chamber 3 into the ash tray 15 and ash box 16, and is then shut again. The ash tray 15 and ash box 16 are emptied by opening the ash pit door 17 and withdrawlng the ash tray and ash box. The ash pit door 17 i5 opened, however, only when the shutter 14 is closed and the ashes have settled in the ash tray 15 and ash box 16.
-. ,. ~ . ~ ; , ....
:::
Z00898~
. - 6 - .
:, In this way there ls less likelihood of loose ashes blowing about the room. The shutter 14 is operated by means of a lever (not shown) at one side of the stove.
The stove, including air ducting 5, is made of cast .~ 5 iron.
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Claims (4)
1. A solid fuel stove comprising:
(a) a combustion chamber and a door for allowing access to said chamber, said combustion chamber including a primary combustion chamber having an outlet for smoke and solid fuel combustion residues and a secondary combustion chamber which is located downstream of said outlet;
(b) combustion improvement means for heating ambient air and introducing the heated air into the flow path of the solid fuel combustion residues to enhance combustion of the residues; and (c) a baffle disposed between said primary and secondary combustion chambers, said baffle being movable between a first position, in which it restricts said outlet so that in use it restricts the outflow of the combustion residues and thereby enhances combustion thereof, and a second position in which said baffle diverts flow towards said outlet so that in use it deflects the combustion residues through said outlet, said baffle being connected to said door, whereby movement of said door results in corresponding movement of said baffle so that when said door is opened, said baffle is moved relative to said outlet so as to prevent the combustion residues escaping from the stove when the door is open.
(a) a combustion chamber and a door for allowing access to said chamber, said combustion chamber including a primary combustion chamber having an outlet for smoke and solid fuel combustion residues and a secondary combustion chamber which is located downstream of said outlet;
(b) combustion improvement means for heating ambient air and introducing the heated air into the flow path of the solid fuel combustion residues to enhance combustion of the residues; and (c) a baffle disposed between said primary and secondary combustion chambers, said baffle being movable between a first position, in which it restricts said outlet so that in use it restricts the outflow of the combustion residues and thereby enhances combustion thereof, and a second position in which said baffle diverts flow towards said outlet so that in use it deflects the combustion residues through said outlet, said baffle being connected to said door, whereby movement of said door results in corresponding movement of said baffle so that when said door is opened, said baffle is moved relative to said outlet so as to prevent the combustion residues escaping from the stove when the door is open.
2. A solid fuel stove according to Claim 1, in which the combustion improvement means comprises air ducting which extends from an ambient air inlet, through a heating zone in the combustion chamber for heating the ambient air, to air outlets into the primary combustion chamber whereby combustion in said primary combustion chamber is enhanced by the provision of heated combustion air.
3. A solid fuel stove according to Claim 2, in which the air ducting includes outlets into said secondary combustion chamber for supplying heated air to the secondary combustion chamber to enhance combustion of residues in that region.
4. A solid fuel stove according to any preceding claim in which the secondary combustion chamber is in thermal communication with the primary combustion chamber below and thermally insulated above so that in operation a high temperature prevails.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE31389A IE61593B1 (en) | 1989-02-01 | 1989-02-01 | Solid fuel stove |
| IE313/89 | 1989-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2008981A1 CA2008981A1 (en) | 1990-08-01 |
| CA2008981C true CA2008981C (en) | 1993-11-30 |
Family
ID=11010309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2008981 Expired - Fee Related CA2008981C (en) | 1989-02-01 | 1990-01-31 | Solid fuel stove |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE1000961A7 (en) |
| CA (1) | CA2008981C (en) |
| IE (1) | IE61593B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5357941A (en) * | 1993-05-17 | 1994-10-25 | Hans Duerichen J G | Refractory baffle insert for fireplace |
-
1989
- 1989-02-01 IE IE31389A patent/IE61593B1/en not_active IP Right Cessation
- 1989-03-03 BE BE8900231A patent/BE1000961A7/en not_active IP Right Cessation
-
1990
- 1990-01-31 CA CA 2008981 patent/CA2008981C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2008981A1 (en) | 1990-08-01 |
| BE1000961A7 (en) | 1989-05-23 |
| IE61593B1 (en) | 1994-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |