CA2244845A1 - Improvements in or relating to fire assemblies - Google Patents
Improvements in or relating to fire assemblies Download PDFInfo
- Publication number
- CA2244845A1 CA2244845A1 CA002244845A CA2244845A CA2244845A1 CA 2244845 A1 CA2244845 A1 CA 2244845A1 CA 002244845 A CA002244845 A CA 002244845A CA 2244845 A CA2244845 A CA 2244845A CA 2244845 A1 CA2244845 A1 CA 2244845A1
- Authority
- CA
- Canada
- Prior art keywords
- conduit
- assembly according
- assembly
- air
- 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.)
- Abandoned
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
- F24B1/00—Stoves or ranges
- F24B1/18—Stoves with open fires, e.g. fireplaces
- F24B1/1808—Simulated fireplaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Baking, Grill, Roasting (AREA)
- Insulated Conductors (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Gas fire assembly (10) comprising a turbine (32) rotatably mounted in a first conduit (18) through which exhaust gases pass. The turbine (32) is drivably connected to freely rotatable fans (40, 42) located in a second conduit located immediately behind the gas burner (12), such that convected air is warmed in the second conduit (22) and pulled therethrough by the fans (40, 42) to push convected air into a room space.
Description
CA 02244845 l998-07-29 W O 97~9327 IMPROVEMENTS IN OR RELATI~G TO FIRE ASSEr~ TFS
This invention relates to fire assemblies. More particularly, but not exclusively, this invention relates to convection type fire assemblies.
i Conventiona~ convection type gas fires operate by providing a convection conduit at the rear of the fire which is heated by the gas burner. The air in the conduit is thus heated, which is passed by convection into the room. Ways have been sought in order to enhance the flow of air through the convection conduit.
According to the invention there is provided a fire assembly for heating a room space, comprising a first conduit to allow vapour from the heating means to exhaust from the assembly, a second conduit arranged in association with the heating means such that air in the second conduit is heated by the heating means, vapour operated drive means arranged in the first conduit, and air impeller means drivably connected to the drive means, the assembly being arranged such that vapour exhausted from the heating means operates the drive means to drive the irnpeller means thereby to impel heated air through the second conduit to heat the room space.
Preferably, the air impeller means comprises a rotary member arranged to be rt)tatable by the air drive means. Preferably, the rotary member comprisesa fan to impel the air through the second conduit. Preferably the first conduit extends through the second conduit and the air impeller means may comprise rotary members arranged respectively OIl either side of the first conduit. A
p~urality of first conduits may be provided, each extending through the second conduit, with drive means in each first conduit, and respective rotary members arranged on either side of some or all of the first conduits.
..
The drive means is preferably arranged to be rotated ~y vapour from the heating means. The drive means may comprise one or more turbines arranged to be rotatable by vapour exhausted from the fire assembly.
CA 02244845 l998-07-29 WO g7129327 Preferably, the drive means is connected by connection means to the impeller means. The connection means may comprise a shaft extending c through the or each first conduit and the second conduit, upon which shaft the drive means and impeller means are mounted. .;
Preferably, the heating means comprises a gas fired burner, and the vapour exhausted from the fire assembly may comprise flue gas forrned during the burning of gas in the burner.
The second conduit may extend from an air inlet at a lower region of the fire assembly to an air outlet at an upper region of the fire assembly.
Preferably, the fire assembly comprises a front and a rear region, the heating means preferably being provided at said front region and the second conduit preferably being provided at said rear region. A chamber may be provided at said front region to house the heating means. Preferably, the air irllet for thesecond conduit is provided below said chamber and the air outlet is preferably provided above said chamber.
E~eat exchange means may be provided on the rear of the chamber within the second conduit.
The or each first conduit preferably extends from an inlet or i}~ets opening into said chamber to an outlet at the rear of said fire assembly.
Preferably, the or each first conduit is arranged towards the upper region of said fire assembly.
Embodiments of the invention will now be described by way of example only in which:
Fig. 1 is a schematic front, part sectional view of a fire assembly according to the invention, showing a drive means and an impeller means;
~ ig. 2 is a view along the lines II-II in Fig. l;
Fig. 3 is a view along the lines III-III in Fig. 2; and Fig. 4 fs a plan view of part of a modified assembly according to the --CA 0224484~ 1998-07-29 invention.
~ eferring to the drawings, there is shown a fire assembly 10 which is in the form of a gas fire, for heating a room space. The fire assembly 10 comprises hearing means in the form of a gas burner 12. The gas burner 12 may be in the form of a live fuel effect burner, and may include imitation fuel,schematically represented at 14. The gas burner ~2 is connected to the mains gas supply in the normal way.
The gas burner 12 is housed within a chamber 16 which is in communication with the region external of the fire assembly 10 via a first conduit 18. The chamber 16 is isolated from the room space to prevent flue gases entering the room space.
When the gas burner 12 is burning, flue gases are emitted which pass from the burner 12 in the direction of the arrow Cl to be exhausted from the fire assembly 10 via the first conduit 18 in the direction of the arrow C2. The flue gases are usually then passed by a chimney or other appropriate construction to a region outside the ~ ling The chamber 16 is defined at the rear by a back wall 20. A: second conduit 22 extends from an inlet 24 at a lower region of the fire assembly 10 toan outlet 26 at an upper region of the fire assembly 10. ~he second conduit 22 extends behind the chamber 16 and is defined by the back wall 20 of the chamber 16 and a rear wall 2~ of the fire assembly 10.
When the gas burner 12 is in operation, to burn gas fed from the mains, the heat produced thereby warms the back wall 20 which, in turn, warms the air in the second conduit 22 directly behind the back wall 20.
. ~
The air in the second conduit 22 then rises by convection in the direction of the arrows D. The rising air in the section of the conduit 22 behind the backwall 20 creates a partial vacuum which causes air to be sucked into the conduit CA 0224484~ 1998-07-29 22 from outside the fire assembly 10 via the inlet 24. The rising air then passes out of the conduit 22 via the outlet 26 to warm the room.
Vapour operated drive means 30 is mounted in the first conduit 18. The drive means 30 comprises a turbine 32 mounted on a shaft 34.
As can be seen, the first conduit 18 extends through the second conduit 22 centrally thereof. The first and second conduits 18, 22 are isolated from each other by walls 36,38. The sha~t 34 extends from the turbine 32 through the walls 36,38 and is journalled in suitable bearings in the walls 36,38.
Appropriate sealing means are provided to ensure that the flue gases passing through the first conduit 18 do not leak into the second conduit 22.
Mounted on the shaft 34 in the second conduit 22, at either side of the turbine 32 are first and second rotary fans 40,42, the purpose of which is to impel air through the second conduit 22 thereby enhancing the warming of the room as effected by convection.
In operation, the turbine 32 iS rotated about the shaft 3~ by the flue gasses passing through the first conduit 18. Since the turbine 32, and the fans 40,42 are each fixedly mounted on the shaft 3~, the rotation of the turbine 32 causes corresponding rotation of the fans 40,42. The fans 40, 42 are provided with a plurality of vanes 44, which are so angled that rotation thereof by the rotating turbine 32 causes the fans 40,42 to impel air in the direction of the arrows D. This impelling of the air by the fans ~0,42 enhances the ~low of warrn air through the second conduit 22 over that which would be caused by convection alone, thereby improving the efficiency of the fire assembly 10.
The flue gases will be pulled by the chimney or other structure through j~
the first conduit 18. The taller the chirnney, generally the greater the pull provided thereby. In conventional fires this can be disadvantageous in taldng heat too quickly from the fire. ~owever, in assemblies according to the invention, the greater the pull the greater the speed of rotation of the turbine CA 0224484~ 1998-07-29 30 and hence fans 40,42, and thus the circulation of hot air into the room space.
Fig. 4 shows a modified arrangement with three first conduits 46,48,50 extending through the second conduit 22 which is hence divided into four parts 52. The central first conduit 48 is larger than the two side first conduits Ds6~50 and each first conduit is equispaced from each other and the sides of the second conduit 22, by the parts 52. Each first conduit 46,48,aO locates a respective size turbine 54, and fans 56 are located in each of the parts 52. Theturbines 54 and fans 56 are all mounted on a shaft 58. This arrangement provides for a more even draw off of flue gases, and also better heat transfer.
Various other modifications can be made without departing from the scope of the invention. For example, the first conduit 18 could be arranged to pass through the second conduit 22 at ~~ne side thereof. In such an arrangement, the fans 40,42 could be replaced by a single fan. In fact a wide variety of configurations of the first and second conduits are possible. Also, instead of a direct drive between the turbine 32 and the fans ~0,42 an appropriate gearing arrangement could be provided. Heat exchanger means such as fins, could be provided on the rear of the back wall 20 and/or elsewhereto assist heating of the air passing through the second conduit.
Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
This invention relates to fire assemblies. More particularly, but not exclusively, this invention relates to convection type fire assemblies.
i Conventiona~ convection type gas fires operate by providing a convection conduit at the rear of the fire which is heated by the gas burner. The air in the conduit is thus heated, which is passed by convection into the room. Ways have been sought in order to enhance the flow of air through the convection conduit.
According to the invention there is provided a fire assembly for heating a room space, comprising a first conduit to allow vapour from the heating means to exhaust from the assembly, a second conduit arranged in association with the heating means such that air in the second conduit is heated by the heating means, vapour operated drive means arranged in the first conduit, and air impeller means drivably connected to the drive means, the assembly being arranged such that vapour exhausted from the heating means operates the drive means to drive the irnpeller means thereby to impel heated air through the second conduit to heat the room space.
Preferably, the air impeller means comprises a rotary member arranged to be rt)tatable by the air drive means. Preferably, the rotary member comprisesa fan to impel the air through the second conduit. Preferably the first conduit extends through the second conduit and the air impeller means may comprise rotary members arranged respectively OIl either side of the first conduit. A
p~urality of first conduits may be provided, each extending through the second conduit, with drive means in each first conduit, and respective rotary members arranged on either side of some or all of the first conduits.
..
The drive means is preferably arranged to be rotated ~y vapour from the heating means. The drive means may comprise one or more turbines arranged to be rotatable by vapour exhausted from the fire assembly.
CA 02244845 l998-07-29 WO g7129327 Preferably, the drive means is connected by connection means to the impeller means. The connection means may comprise a shaft extending c through the or each first conduit and the second conduit, upon which shaft the drive means and impeller means are mounted. .;
Preferably, the heating means comprises a gas fired burner, and the vapour exhausted from the fire assembly may comprise flue gas forrned during the burning of gas in the burner.
The second conduit may extend from an air inlet at a lower region of the fire assembly to an air outlet at an upper region of the fire assembly.
Preferably, the fire assembly comprises a front and a rear region, the heating means preferably being provided at said front region and the second conduit preferably being provided at said rear region. A chamber may be provided at said front region to house the heating means. Preferably, the air irllet for thesecond conduit is provided below said chamber and the air outlet is preferably provided above said chamber.
E~eat exchange means may be provided on the rear of the chamber within the second conduit.
The or each first conduit preferably extends from an inlet or i}~ets opening into said chamber to an outlet at the rear of said fire assembly.
Preferably, the or each first conduit is arranged towards the upper region of said fire assembly.
Embodiments of the invention will now be described by way of example only in which:
Fig. 1 is a schematic front, part sectional view of a fire assembly according to the invention, showing a drive means and an impeller means;
~ ig. 2 is a view along the lines II-II in Fig. l;
Fig. 3 is a view along the lines III-III in Fig. 2; and Fig. 4 fs a plan view of part of a modified assembly according to the --CA 0224484~ 1998-07-29 invention.
~ eferring to the drawings, there is shown a fire assembly 10 which is in the form of a gas fire, for heating a room space. The fire assembly 10 comprises hearing means in the form of a gas burner 12. The gas burner 12 may be in the form of a live fuel effect burner, and may include imitation fuel,schematically represented at 14. The gas burner ~2 is connected to the mains gas supply in the normal way.
The gas burner 12 is housed within a chamber 16 which is in communication with the region external of the fire assembly 10 via a first conduit 18. The chamber 16 is isolated from the room space to prevent flue gases entering the room space.
When the gas burner 12 is burning, flue gases are emitted which pass from the burner 12 in the direction of the arrow Cl to be exhausted from the fire assembly 10 via the first conduit 18 in the direction of the arrow C2. The flue gases are usually then passed by a chimney or other appropriate construction to a region outside the ~ ling The chamber 16 is defined at the rear by a back wall 20. A: second conduit 22 extends from an inlet 24 at a lower region of the fire assembly 10 toan outlet 26 at an upper region of the fire assembly 10. ~he second conduit 22 extends behind the chamber 16 and is defined by the back wall 20 of the chamber 16 and a rear wall 2~ of the fire assembly 10.
When the gas burner 12 is in operation, to burn gas fed from the mains, the heat produced thereby warms the back wall 20 which, in turn, warms the air in the second conduit 22 directly behind the back wall 20.
. ~
The air in the second conduit 22 then rises by convection in the direction of the arrows D. The rising air in the section of the conduit 22 behind the backwall 20 creates a partial vacuum which causes air to be sucked into the conduit CA 0224484~ 1998-07-29 22 from outside the fire assembly 10 via the inlet 24. The rising air then passes out of the conduit 22 via the outlet 26 to warm the room.
Vapour operated drive means 30 is mounted in the first conduit 18. The drive means 30 comprises a turbine 32 mounted on a shaft 34.
As can be seen, the first conduit 18 extends through the second conduit 22 centrally thereof. The first and second conduits 18, 22 are isolated from each other by walls 36,38. The sha~t 34 extends from the turbine 32 through the walls 36,38 and is journalled in suitable bearings in the walls 36,38.
Appropriate sealing means are provided to ensure that the flue gases passing through the first conduit 18 do not leak into the second conduit 22.
Mounted on the shaft 34 in the second conduit 22, at either side of the turbine 32 are first and second rotary fans 40,42, the purpose of which is to impel air through the second conduit 22 thereby enhancing the warming of the room as effected by convection.
In operation, the turbine 32 iS rotated about the shaft 3~ by the flue gasses passing through the first conduit 18. Since the turbine 32, and the fans 40,42 are each fixedly mounted on the shaft 3~, the rotation of the turbine 32 causes corresponding rotation of the fans 40,42. The fans 40, 42 are provided with a plurality of vanes 44, which are so angled that rotation thereof by the rotating turbine 32 causes the fans 40,42 to impel air in the direction of the arrows D. This impelling of the air by the fans ~0,42 enhances the ~low of warrn air through the second conduit 22 over that which would be caused by convection alone, thereby improving the efficiency of the fire assembly 10.
The flue gases will be pulled by the chimney or other structure through j~
the first conduit 18. The taller the chirnney, generally the greater the pull provided thereby. In conventional fires this can be disadvantageous in taldng heat too quickly from the fire. ~owever, in assemblies according to the invention, the greater the pull the greater the speed of rotation of the turbine CA 0224484~ 1998-07-29 30 and hence fans 40,42, and thus the circulation of hot air into the room space.
Fig. 4 shows a modified arrangement with three first conduits 46,48,50 extending through the second conduit 22 which is hence divided into four parts 52. The central first conduit 48 is larger than the two side first conduits Ds6~50 and each first conduit is equispaced from each other and the sides of the second conduit 22, by the parts 52. Each first conduit 46,48,aO locates a respective size turbine 54, and fans 56 are located in each of the parts 52. Theturbines 54 and fans 56 are all mounted on a shaft 58. This arrangement provides for a more even draw off of flue gases, and also better heat transfer.
Various other modifications can be made without departing from the scope of the invention. For example, the first conduit 18 could be arranged to pass through the second conduit 22 at ~~ne side thereof. In such an arrangement, the fans 40,42 could be replaced by a single fan. In fact a wide variety of configurations of the first and second conduits are possible. Also, instead of a direct drive between the turbine 32 and the fans ~0,42 an appropriate gearing arrangement could be provided. Heat exchanger means such as fins, could be provided on the rear of the back wall 20 and/or elsewhereto assist heating of the air passing through the second conduit.
Whilst endeavouring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
Claims (19)
1. A fire assembly (10) for heating a room space, comprising a first conduit (18,46,48,50) to allow flue gases from the heating means (12) to exhaust from the assembly (10), a second conduit (22) arranged in association with the heating means (12) such that air in the second conduit is heated by the heating means (12), characterised in that the assembly also comprises vapour operated drive means (30) arranged in the first conduit (18,46,48,50), and air impeller means (40,42,56) drivably connected to the drive means (30), the assembly (10) being arranged such that flue gases exhausting through the first conduit (18,46,48,50) operate the drive means (30) to drive the impeller means (40,42,56) thereby to impel heated air through the second conduit (22) to heat the room space.
2. An assembly according to claim 1, characterised in that the air impeller means comprises a rotary member (40,42,56) arranged to be rotatable by the air drive means (30).
3. An assembly according to claim 2, characterised in that the rotary member comprises a fan (40,42,56) to impel the air through the second conduit (22).
4. An assembly according to any of claims 1 to 3, characterised in that the first conduit (18,46,48,50) extends through the second conduit (22).
5. An assembly according to claim 4 when dependent on claims 2 or 3, characterised in that the air impeller means comprises rotary members (32,54) arranged respectively on either side of the first conduit (18).
6. An assembly according to claim 5, characterised in that a plurality of first conduits (46,48,50) are provided, each extending through the second conduit (22), with drive means (54) in each first conduit, and respective rotary members (56) arranged on either side of some or all of the first conduits (46,48,50).
7. An assembly according to any of the preceding claims, characterised in that the drive means (30) is arranged to be rotated by flue gases from the heating means (12).
8. An assembly according to claim 7, characterised in that the drive means (30) comprises one or more turbines (32,54) arranged to be rotatable by flue gases exhausted from the fire assembly (10).
9. An assembly according to any of the preceding claims, characterised in that the drive means (30) is connected by connection means (34,58) to the impeller means (40,42,56).
10. An assembly according to claim 9, characterised in that the connection means comprises a shaft (34,58) extending through the or each first conduit (18,46,48,50) and the second conduit (22), upon which shaft (34,58) the drive means (30) and impeller means (40,42,56) are mounted.
11. An assembly according to any of the preceding claims, characterised in that the heating means comprises a gas fired burner (12).
12. An assembly according to any of the preceding claims, characterised in that the second conduit (22) extends from an air inlet (24) at a lower region ofthe fire assembly (10) to an air outlet (26) at an upper region of the fire assembly (10).
13. An assembly according to any of the preceding claims, characterised in that the fire assembly (10) comprises a front and a rear region, the heating means (12) preferably being provided at said front region and the second conduit (22) preferably being provided at said rear region.
14. An assembly according to claim 13, characterised in that a chamber (16) is provided at said front region to house the heating means (12).
15. An assembly according to claim 14 when dependent on claim 12, characterised in that the air inlet (24) for the second conduit (22) is providedbelow said chamber (16).
16. An assembly according to claims 14 or 15 when dependent on claim 12, characterised in that the air outlet (26) for the second conduit (22) is provided above said chamber (16).
17. An assembly according to any of claims 14 to 16, characterised in that heat exchange means is provided on the rear of the chamber (16) within the second conduit (22).
18. An assembly according to any of claims 14 to 17, characterised in that the or each first conduit (18,46,48,50) extends from an inlet or inlets opening into said chamber (16) to an outlet at the rear of said fire assembly.
19. An assembly according to claim 18, characterised in that the or each first conduit (18,46,48,50) is arranged towards the upper region of said fire assembly(10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9602382.5A GB9602382D0 (en) | 1996-02-06 | 1996-02-06 | Improvements in or relating to fire assemblies |
| GB9602382.5 | 1996-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2244845A1 true CA2244845A1 (en) | 1997-08-14 |
Family
ID=10788205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002244845A Abandoned CA2244845A1 (en) | 1996-02-06 | 1997-02-04 | Improvements in or relating to fire assemblies |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0879386B1 (en) |
| AT (1) | ATE218690T1 (en) |
| CA (1) | CA2244845A1 (en) |
| DE (1) | DE69713063D1 (en) |
| GB (1) | GB9602382D0 (en) |
| WO (1) | WO1997029327A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL68673Y1 (en) | 2014-02-06 | 2016-11-30 | Bal Marek Kratki | Device for collecting of heat |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4223659A (en) * | 1977-07-01 | 1980-09-23 | Therm - Air Industries, Inc. | Forced air heater |
| US4241719A (en) * | 1978-03-17 | 1980-12-30 | Vickery Joseph K | Heater stove apparatus |
| US4256081A (en) * | 1979-05-16 | 1981-03-17 | Stover Michael L | Air circulation and humidification system for stoves |
| US4344569A (en) * | 1980-01-17 | 1982-08-17 | Gardner James J | Steam powered stove |
-
1996
- 1996-02-06 GB GBGB9602382.5A patent/GB9602382D0/en active Pending
-
1997
- 1997-02-04 CA CA002244845A patent/CA2244845A1/en not_active Abandoned
- 1997-02-04 WO PCT/GB1997/000310 patent/WO1997029327A1/en active IP Right Grant
- 1997-02-04 DE DE69713063T patent/DE69713063D1/en not_active Expired - Lifetime
- 1997-02-04 EP EP97902463A patent/EP0879386B1/en not_active Expired - Lifetime
- 1997-02-04 AT AT97902463T patent/ATE218690T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE69713063D1 (en) | 2002-07-11 |
| ATE218690T1 (en) | 2002-06-15 |
| GB9602382D0 (en) | 1996-04-03 |
| EP0879386A1 (en) | 1998-11-25 |
| EP0879386B1 (en) | 2002-06-05 |
| WO1997029327A1 (en) | 1997-08-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |