EP0703409B1 - An LPG burning appliance - Google Patents
An LPG burning appliance Download PDFInfo
- Publication number
- EP0703409B1 EP0703409B1 EP95305589A EP95305589A EP0703409B1 EP 0703409 B1 EP0703409 B1 EP 0703409B1 EP 95305589 A EP95305589 A EP 95305589A EP 95305589 A EP95305589 A EP 95305589A EP 0703409 B1 EP0703409 B1 EP 0703409B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- valve
- canister
- inlet
- fuel flow
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims abstract description 106
- 238000007789 sealing Methods 0.000 description 15
- 230000001105 regulatory effect Effects 0.000 description 10
- 239000003915 liquefied petroleum gas Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/44—Preheating devices; Vaporising devices
- F23D11/441—Vaporising devices incorporated with burners
- F23D11/443—Vaporising devices incorporated with burners heated by the main burner flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
Definitions
- the present invention relates to LPG (liquefied petroleum gas) burning appliances, and in particular to LPG burning appliances having a safety arrangement.
- LPG liquefied petroleum gas
- a regulating valve is releasably securable directly to the fuel canister and is connected to the burner by means of a tube, either flexible or rigid. When the regulating valve is closed there is thus the possibility that the tube connecting the regulating valve to the burner can be full of fuel which can thereafter make its way out of the burner.
- the connection of the tube to the fuel canister is normally by means of a screw-thread arrangement which, upon separation of the tube from the canister causes a self-sealing valve in the canister to close.
- the tube will be full of fuel which will not make its way to the burner and be burned off, since the regulating valve will be in the closed position.
- a burner according to the prior art is also known from US 3 877 458 A.
- an LPG burning appliance comprises a body having connection means for releasably connecting the body to a fuel canister to permit the flow of fuel from the canister, a body fuel inlet to permit the flow of fuel into the body, a burner assembly having an outlet jet secured to and extending from the body and a fuel flow passage between the fuel inlet and the fuel outlet jet for feeding fuel from a canister to the fuel outlet jet, the fuel flow passage including a fuel flow conduit, both ends of which secured to the body and which extends through a flame zone of the burner assembly, thereby providing a fuel flow path which constrains all fuel from the canister to pass from the body inlet to a flame zone of the burner assembly and back to the fuel outlet jet, the body further comprising a control valve located in the fuel flow passage in the body, characterised in that the burner assembly is located above the body and in that the fuel conduit extends upwardly from the body into the flame zone and then downwardly back to the body.
- the maximum amount of unburned fuel within the appliance is essentially the amount of fuel remaining in the fuel flow conduit.
- the valve is located in the fuel flow passage between the body inlet and the inlet to the gas flow conduit.
- This arrangement allows a user to turn off the appliance if the fuel flow conduit is perforated due to damage or corrosion. If the valve were located at the other end of the conduit and the conduit were damaged the burner orifice would not limit the maximum rate of fuel flow and a large quantity of fuel could be released. Also in such an arrangement, if the valve is turned off then the maximum amount of unburned fuel which can remain in the appliance (e.g. if the assembly is overturned when connected to a fuel canister) is the amount of fuel in the fuel flow passage between the fuel inlet and the valve.
- connection means comprises a screw-threaded connection to a complimentarily-threaded connection on a fuel canister.
- the assembly is provided with means for piercing a wall of a fuel canister and comprises means for releasably holding the assembly in position on the canister.
- a burner assembly comprises a cast metal valve body 10 and a metal casing 11 covering the upper and side portions of the body 10.
- a burner 12, a fuel flow conduit 14 and a regulating valve control knob 16 extend from the valve body beyond the casing 11.
- the burner 12 comprises a tubular conduit 18 and a burner head 20, and the lower portion of the conduit 18 is internally screw-threaded to engage with an externally-threaded boss 22 forming part of the valve body 10 and extending upwardly therefrom.
- the boss 22 is provided with a threaded fuel exit aperture 24 which screw-threadedly receives a correspondingly-threaded portion of a burner jet 26 which in use extends into the conduit 18 of the burner 12.
- An annular collar 28 extends downwardly from the base of the body 10 and is provided with an internal screw thread 30 which is engageable with a corresponding thread 32 forming part of a conventional sealing cap 34 of an LPG container 36.
- the body 10 is also provided with a downwardly-projecting finger 38 which is adapted to open a self-sealing valve 39 (shown schematically) located in the sealing cap 34 of the canister 36.
- the valve body is also provided with an external flat rubber sealing ring 40 and an internal sealing O-ring 41 which, in use, sealingly engage an annular shoulder 42 of the canister sealing cap 34 and an upper face of the body of the self-sealing valve 39 respectively.
- the fuel flow conduit 14 is brazed to the body 10 and is in the form of a metal tube which is shaped and dimensioned so that at least a portion of the tube 14 projects into a flame zone of the burner 12.
- a first, fuel inlet end of the tube is seated in a recess 42 in a side wall of the body 10 and the other end of the tube is seated in a second recess 44 located adjacent to the recess 42.
- the recess 44 is shown, schematically, as being located above the recess 42 but this is shown for clarification only and the actual arrangement is as illustrated in Fig. 1 with the two recesses 42, 44 at the same height on the valve body 10.
- the tube 14 forms part of a fuel flow passage comprising a first bore 46 extending vertically from a fuel inlet 48 in the base of the body 10 leading to a regulating valve 50, a horizontal bore 51 which leads from the valve 50 to the inlet end of the tube 14, the tube 14 and a horizontal bore 53 which leads from the outlet end of the tube 14 to the fuel exit aperture 24 of the hollow boss 22.
- the regulating valve 50 is disposed in the passage means between the valve body fuel inlet 48 and the tube 14.
- the valve 50 comprises an elongate valve closure member 54 which is positioned in a stepped bore 55 in the valve and to which the valve control knob 16 is attached.
- the valve closure member 54 is provided with a frusto-conical shoulder 56 at the end remote from the control knob 16, the shoulder 56 being releasably sealingly engageable with a complimentarily-shaped valve seat 58 formed in the valve body 10.
- valve closure member 52 An enlarged portion 60 of the valve closure member 52 is screw-threadedly engaged with an internally-threaded portion 62 of the bore 54, thereby enabling the valve closure member 52 to be displaced longitudinally in both directions by rotation of the valve control knob 16 and permitting the frusto-conical shoulder 56 to be engaged with and disengaged from the valve seat 58.
- the portion of the valve closure member 52 adjacent to the frusto-conical shoulder 56 is provided with two O-rings 64 which are located in grooves in the valve closure member which are defined by circumferential ribs 66.
- the burner assembly is screw-threadedly connected to the sealing cap 34 of an LPG canister 36, whereupon the sealing ring 40 engages the annular shoulder 42 of the cap 34, the sealing O-ring 41 engages the upper face of the body of the self-sealing valve 39 and the finger 38 opens the self-sealing valve 39 in the valve cap 34.
- This permits vaporised fuel to enter the inlet 48 in the valve body 10.
- the valve 50 would normally be closed at this stage and thus fuel is able to travel no further than the valve closure member 54.
- the valve 50 is opened by turning the knob 16, fuel is allowed to flow along the fuel flow passage, namely along bore 46, through the valve 50, through bore 51, through the tube 14, through horizontal bore 53 and thereby into the jet 26.
- the gas is then lit at the burner, and subsequent fuel flowing through the fuel flow conduit 14 will be heated since the upper end of the fuel flow conduit 14 is situated in the vicinity of the flame of the burner 12. This ensures that even if the burner is tipped over, any fuel reaching the burner will be vaporised rather than liquefied, thus preventing the discharge of liquefied fuel from the jet 26 and preventing flaring.
- the tube 14 will be at a relatively high temperature which will help to ensure that any fuel in the tube 14 will be gaseous and will either be burned before the flame is extinguished or will quickly vent to atmosphere without undue risk.
- the second embodiment illustrated in Figs. 3 and 4 is very similar to the first embodiment, and similar reference numerals have been used to describe similar features. The only significant difference is the method of securing the assembly to the fuel canister.
- the burner assembly is intended for use with a fuel canister which has a self-sealing valve which is opened by the finger 34 upon connection of the assembly to the canister.
- the assembly of Figs. 3 and 4 is intended for use with a canister 68 which does not have a valve but which has a concave portion 69 which is pierced by the assembly.
- the collar 26 of the first embodiment is replaced with an externally-threaded collar 70 which in turn is screw-threadedly connected to an annular yoke 71 which forms part of a conventional securing cover which covers the upper portion of the canister 68.
- the collar 70 is provided with an internal bore 72 in which a metal piston 74 is slidably disposed, the piston being sealed with respect to the bore 72 by means of O-ring seals 76.
- the piston 74 is biassed downwardly by means of a compression spring 78 acting on the upper end of the piston.
- the piston is also provided with a through bore 80 which receives a piercing spike 82 which bears against the upper end of the chamber.
- the lower end of the piston is also provided with a rubber seal 84 which surrounds the spike 82 and which is shaped complimentarily with the concave portion 69 of the canister 68.
- the piston In use, the piston extends beyond the end of the spike 82 and is brought into engagement with the recess 69 on the upper portion of the fuel canister 68.
- the assembly is then displaced downwardly which causes the tapered spike 82 to pierce the recessed wall portion 69 of the canister. This permits gas to flow past the spike 82 through the bore 72 of the piston and into the valve body 10, where it reaches the jet via the valve 50 and the tube 14.
- the assembly is held in position by means of conventional hingedly mounted legs (not shown) which are secured to the cap covering the upper portion of the fuel canister 68 and which are hinged to engage with the base of the canister 68 in the conventional manner.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Gas Separation By Absorption (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Organic Insulating Materials (AREA)
- Gas Burners (AREA)
- Spray-Type Burners (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9416420 | 1994-08-13 | ||
GB9416420A GB9416420D0 (en) | 1994-08-13 | 1994-08-13 | An LPG burning appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0703409A1 EP0703409A1 (en) | 1996-03-27 |
EP0703409B1 true EP0703409B1 (en) | 2000-10-18 |
Family
ID=10759863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95305589A Expired - Lifetime EP0703409B1 (en) | 1994-08-13 | 1995-08-10 | An LPG burning appliance |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0703409B1 (ko) |
JP (1) | JP3629623B2 (ko) |
KR (1) | KR960008160A (ko) |
AT (1) | ATE197089T1 (ko) |
CA (1) | CA2155881A1 (ko) |
DE (2) | DE703409T1 (ko) |
ES (1) | ES2087847T1 (ko) |
GB (1) | GB9416420D0 (ko) |
GR (1) | GR960300026T1 (ko) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5868126A (en) * | 1996-08-12 | 1999-02-09 | The Coleman Company, Inc. | LPG canister connector for combustion appliance |
CA2194598A1 (en) | 1996-08-12 | 1998-02-12 | Norris R. Long | Lpn canister connector for combustion appliance |
FR2774453B1 (fr) | 1998-02-03 | 2000-03-17 | Coleman Co | Appareil a combustion d'un gaz combustible obtenu par vaporisation d'un gaz liquifie et procede de combustion d'un tel gaz |
US6042368A (en) * | 1998-02-03 | 2000-03-28 | The Coleman Company, Inc. | Appliance for burning a combustible gas, and method of burning such a gas |
JP3550036B2 (ja) | 1999-01-08 | 2004-08-04 | 株式会社スノーピーク | 携帯用ガスコンロのバーナー構造 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2208087B1 (ko) * | 1972-11-28 | 1976-07-02 | Applic Gaz Sa | |
US3877458A (en) * | 1973-02-02 | 1975-04-15 | Optimus Ab | Portable stove |
GB8527583D0 (en) | 1985-11-08 | 1985-12-11 | Taymar Ltd | Gas burner assembly |
US4734029A (en) * | 1986-07-21 | 1988-03-29 | The Coleman Company, Inc. | Burner for campstove |
DE3718994A1 (de) * | 1987-06-06 | 1988-12-22 | Kaercher Gmbh & Co Alfred | Druckverdampferbrenner, vorzugsweise zur verwendung in einem feldkochherd |
-
1994
- 1994-08-13 GB GB9416420A patent/GB9416420D0/en active Pending
- 1994-12-15 KR KR1019940034340A patent/KR960008160A/ko not_active Application Discontinuation
-
1995
- 1995-08-10 EP EP95305589A patent/EP0703409B1/en not_active Expired - Lifetime
- 1995-08-10 DE DE0703409T patent/DE703409T1/de active Pending
- 1995-08-10 ES ES95305589T patent/ES2087847T1/es active Pending
- 1995-08-10 AT AT95305589T patent/ATE197089T1/de not_active IP Right Cessation
- 1995-08-10 DE DE69519146T patent/DE69519146T2/de not_active Expired - Lifetime
- 1995-08-11 CA CA002155881A patent/CA2155881A1/en not_active Abandoned
- 1995-08-14 JP JP22853395A patent/JP3629623B2/ja not_active Expired - Fee Related
-
1996
- 1996-05-31 GR GR960300026T patent/GR960300026T1/el unknown
Also Published As
Publication number | Publication date |
---|---|
GR960300026T1 (en) | 1996-05-31 |
JPH08100909A (ja) | 1996-04-16 |
CA2155881A1 (en) | 1996-02-14 |
JP3629623B2 (ja) | 2005-03-16 |
GB9416420D0 (en) | 1994-10-05 |
DE69519146T2 (de) | 2001-03-01 |
ES2087847T1 (es) | 1996-08-01 |
DE69519146D1 (de) | 2000-11-23 |
KR960008160A (ko) | 1996-03-22 |
EP0703409A1 (en) | 1996-03-27 |
DE703409T1 (de) | 1996-11-07 |
ATE197089T1 (de) | 2000-11-15 |
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