WO1999030085A1 - A device for a feeding and nozzle system for a primus type burner - Google Patents

A device for a feeding and nozzle system for a primus type burner Download PDF

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Publication number
WO1999030085A1
WO1999030085A1 PCT/NO1998/000360 NO9800360W WO9930085A1 WO 1999030085 A1 WO1999030085 A1 WO 1999030085A1 NO 9800360 W NO9800360 W NO 9800360W WO 9930085 A1 WO9930085 A1 WO 9930085A1
Authority
WO
WIPO (PCT)
Prior art keywords
burner
nozzle
feed line
fuel
heat generator
Prior art date
Application number
PCT/NO1998/000360
Other languages
French (fr)
Inventor
Tor A. Oftedal
Original Assignee
Velle Industri As
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 Velle Industri As filed Critical Velle Industri As
Priority to AU13546/99A priority Critical patent/AU1354699A/en
Priority to CA002312750A priority patent/CA2312750A1/en
Priority to GB0013228A priority patent/GB2347208B/en
Publication of WO1999030085A1 publication Critical patent/WO1999030085A1/en
Priority to SE0001983A priority patent/SE0001983L/en

Links

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
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • F23K5/22—Vaporising devices

Definitions

  • the present invention relates to a device for a feeding and nozzle system for a pressure burner of the "Primus" type.
  • the present invention relates to a pressure burner of the "Primus" type which is based on liquid fuel.
  • a problem with known burners of the type based on liquid fuel has been to achieve a sufficiently safe and rapid gasification of the fuel in the kindling or lighting phase.
  • the problem is greatest with use of heavily volatile fuel, for example, of the paraffin type, which is a preferred fuel type.
  • the problem is particularly pronounced under field conditions with low temperatures such as can occur with use in connection with military exercizes, Red Cross emergency training and the like, as well as in outdoor life and expeditions of more extreme type.
  • the present invention has the objective of alleviating the deficiencies relating to preheating of fuel for a pressure burner of the "Primus" type.
  • the invention aims to provide a burner that satisfies all of a long list of requirements that are currently set by the users, essentially summarized as follows: 1) the burner must be in one piece and must not necessitate any mounting or assembly of loose parts;
  • the burner must ensure effective combustion and a low, if any, generation of CO;
  • the present invention thus relates to a device for a feeding and nozzle system for a burner of the Primus type, comprising a feed line near the burner's burner ring, and the invention is characterized by a heat generator located near or on the feed line, disposed over an ignition hollow in a heat shield and fixedly connected to a nozzle holder, optionally via the feed line, where the nozzle holder further exhibits a through-running passage for fuel, and a nozzle on the holder having a remote controllable nozzle cleaning wire running centrally therethrough.
  • the heat generator consists of hoops of solid copper wire.
  • the heat generator is formed as a tube having flat ribs, slid onto the fuel feed line in heat-conductive contact therewith.
  • Figure 1 is a schematic view of a burner having a fuel tank, operating panel and burner ring with appurtenant equipment;
  • Figure 2 is a cross-sectional view through the embodiment shown in Figure 1 ;
  • Figure 3 is an oblique top view of this embodiment in enlarged scale;
  • Figure 4 is a view of a preferred embodiment at the same angle and in the same scale as Figure 3.
  • FIG. 5 shows a detail of the heat generator as sketched in Figure 4; and - Figure 6 shows an embodiment of the remote control of a nozzle cleaning wire.
  • Figure 1 is a schematic view of a burner in one embodiment of the invention.
  • the burner comprises a fuel tank 9, a block comprising an operating panel 10 having operating knobs 11 and an upper burner section.
  • the burner section comprises primarily a burner ring 8, a fuel feed line 1 and a heat generator 2, fixedly attached to a nozzle holder 4.
  • Beneath the heat generator is a burning or ignition hollow, indicated at 12, in the heat shield 13.
  • Feed line 1 for fuel leads from the fuel tank 9 through the block having operating means 10, 11 and in the embodiment shown is brought up through shield 13 and in an arc around burner ring 8 before being passed into nozzle holder 4 where the fuel runs through a passage 5 to the nozzle 14.
  • the heat generator is constructed in the form of hoops of solid copper wire, welded to the nozzle holder.
  • heat generator 2 is constructed in the form of a tube 14 having flanges 15, slid onto feed tube 1 and positioned over ignition hollow 12.
  • Heat generator 2 is, in this case, preferably made of brass, as this is a material which is relatively easily shaped so as to provide the flanges, and since brass has high heat resistance.
  • feed line 1 is inserted through a block 4' as a part of nozzle holder 4.
  • the burner is also equipped with a nozzle cleaning system where nozzle 14 is cleaned by means of a remotely operated cleaning wire or needle 7 which runs into the lower part of nozzle holder 4 and out into nozzle 14.
  • This cleaning needle 7 is operated with the aid of a push-button 17 which works against a spring 18.
  • button 17 When button 17 is pressed against spring 18, cleaning needle 7 is pressed through the opening in nozzle 14 and cleans it, whereas in its rest position it remains in a retracted position.
  • a so-called ceramic wick located in the ignition hollow.
  • This wick is ma ⁇ e of a ceramic, fuel-absorbing material which is uncovered on both sides toward the surroundings so that only the lower part in the fluid and the upper burn-off surface are open. This ensures a controlled combustion of the lighter fluid beneath the heat generator 2 after ignition.
  • the solid copper hoops 2 provide for quick and rapid heat conduction to nozzle holder 4, at the same time as the heat from the burning lighter fluid will to a certain degree heat up feed line 1 in this section.
  • heat emerging from heat generator 2 will then heat up the nozzle holder and the nozzle, thus facilitating gasification/vaporization of fuel from fuel tank 9 under pressure, which in turn ensures an effective blending of air 19 and fuel 20 in a mixing chamber 21 of approximately a venturi type for distribution to burner ring 8.
  • FIG. 4 A preferred embodiment of the heat generator is shown in Figures 4 and 5.
  • the heat generator consists, as mentioned above, of a tube 23 having flanges 15, slid onto feed line 16 and positioned over the burning hollow 12 having the ceramic wick, which is not shown.
  • the upstream copper wires (16), and particularly those in the area around the burner ring (8), may be laid in a steel wire in a manner known per se.
  • the burner is equipped, in a manner known per se, with supports 22 for the cooking vessel that are capable of being swung inward or lowered.
  • the simplified ignition with full utilization of heat for preheating of fuel is a substantial improvement in relation to the known art, and it is also safer since the chance of spillage and unintentional fire is substantially reduced.
  • the improved gasification/vaporization from the nozzle and the illustrated design of the mixing chamber provide for sufficient infusion of air above the stoichiometrically required amount.
  • An advantage of the illustrated device is that exhaust gases from burning off the lighter fluid in the ignition hollow will not be sucked into the mixing chamber for fuel and air, but disappears over the heat shield into the atmosphere together with the exhaust gases from the burner.
  • the burner may be re-ignited, after a stoppage of a few moments, due to the stored up heat. Such a stoppage could occur, for example, in connection with changing the fuel container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Spray-Type Burners (AREA)
  • Lighters Containing Fuel (AREA)
  • Gas Burners (AREA)

Abstract

A device for a feeding and nozzle system for a burner of the Primus type, comprising a feed line (1) near the burner's burner ring (8), having a heat generator (2) located near or on the feed line (1), disposed over an ignition hollow (12) in a heat shield (13) and fixedly connected to a nozzle holder (4, 4'), optionally via the feed line (1), where the nozzle holder further exhibits a through-running passage (5) for fuel and a nozzle (14) having a remote controllable nozzle cleaning wire (7) running centrally therethrough.

Description

A device for a feeding and nozzle system for a Primus type burner
The present invention relates to a device for a feeding and nozzle system for a pressure burner of the "Primus" type.
There are known a great many pressure burners of this type based on both gaseous and liquid fuel.
The present invention relates to a pressure burner of the "Primus" type which is based on liquid fuel.
A problem with known burners of the type based on liquid fuel has been to achieve a sufficiently safe and rapid gasification of the fuel in the kindling or lighting phase. The problem is greatest with use of heavily volatile fuel, for example, of the paraffin type, which is a preferred fuel type. The problem is particularly pronounced under field conditions with low temperatures such as can occur with use in connection with military exercizes, Red Cross emergency training and the like, as well as in outdoor life and expeditions of more extreme type.
It has been common to start the gasification of the fuel by preheating parts of the fuel course and nozzle head by using a fuel in solid or liquid form in a bowl beneath the burner head. This method has proven to be relatively ineffective in practice, with only a small fraction of the heat being transferred to the fuel outlet and the nozzle head.
With regard to lighting with liquid lighter fluid, this is an unsafe method, at least under "field conditions," with a danger of spillage due to a cold-related reduction in manipulation capability, an uneven and insecure base surface, et cetera — at best an unsafe and at worst a very dangerous method due to the possibility of spillage and fire.
The present invention has the objective of alleviating the deficiencies relating to preheating of fuel for a pressure burner of the "Primus" type.
At the same time the invention aims to provide a burner that satisfies all of a long list of requirements that are currently set by the users, essentially summarized as follows: 1) the burner must be in one piece and must not necessitate any mounting or assembly of loose parts;
2) the burner must exhibit a low structural height and
3) it must have slight volume and weight; 4) the burner must be safe with regard to spillage and fire risk, and it must be simple to use;
5) the burner must ensure effective combustion and a low, if any, generation of CO;
6) the burner must have a so-called "low signature," meaning that it must have very low light and sound; and
7) it must enable simple maintenance.
The present invention thus relates to a device for a feeding and nozzle system for a burner of the Primus type, comprising a feed line near the burner's burner ring, and the invention is characterized by a heat generator located near or on the feed line, disposed over an ignition hollow in a heat shield and fixedly connected to a nozzle holder, optionally via the feed line, where the nozzle holder further exhibits a through-running passage for fuel, and a nozzle on the holder having a remote controllable nozzle cleaning wire running centrally therethrough.
In one embodiment the heat generator consists of hoops of solid copper wire.
In a preferred embodiment the heat generator is formed as a tube having flat ribs, slid onto the fuel feed line in heat-conductive contact therewith.
In connection with this preferred embodiment there is, in addition, arranged a copper wire inside the feed line.
To control the process of burning off the lighter fluid in the ignition hollow, it may be an advantage to employ a ceramic wick.
The invention will be illustrated further with the aid of the accompanying drawings, where:
- Figure 1 is a schematic view of a burner having a fuel tank, operating panel and burner ring with appurtenant equipment; Figure 2 is a cross-sectional view through the embodiment shown in Figure 1 ; Figure 3 is an oblique top view of this embodiment in enlarged scale; Figure 4 is a view of a preferred embodiment at the same angle and in the same scale as Figure 3.
Figure 5 shows a detail of the heat generator as sketched in Figure 4; and - Figure 6 shows an embodiment of the remote control of a nozzle cleaning wire.
Figure 1 is a schematic view of a burner in one embodiment of the invention.
The burner comprises a fuel tank 9, a block comprising an operating panel 10 having operating knobs 11 and an upper burner section. The burner section comprises primarily a burner ring 8, a fuel feed line 1 and a heat generator 2, fixedly attached to a nozzle holder 4.
Beneath the heat generator is a burning or ignition hollow, indicated at 12, in the heat shield 13.
Feed line 1 for fuel leads from the fuel tank 9 through the block having operating means 10, 11 and in the embodiment shown is brought up through shield 13 and in an arc around burner ring 8 before being passed into nozzle holder 4 where the fuel runs through a passage 5 to the nozzle 14.
In the embodiment shown in Figures 1, 2 and 3, the heat generator is constructed in the form of hoops of solid copper wire, welded to the nozzle holder.
In the embodiment shown in Figures 4 and 5, heat generator 2 is constructed in the form of a tube 14 having flanges 15, slid onto feed tube 1 and positioned over ignition hollow 12.
Heat generator 2 is, in this case, preferably made of brass, as this is a material which is relatively easily shaped so as to provide the flanges, and since brass has high heat resistance.
In the latter case with a heat generator as shown in Figures 4 and 5, there is also advantageously arranged a copper wire 16 in feed tube 1.
In the embodiment shown in Figure 4, feed line 1 is inserted through a block 4' as a part of nozzle holder 4. As indicated in Figure 2 and Figure 6, the burner is also equipped with a nozzle cleaning system where nozzle 14 is cleaned by means of a remotely operated cleaning wire or needle 7 which runs into the lower part of nozzle holder 4 and out into nozzle 14.
This cleaning needle 7 is operated with the aid of a push-button 17 which works against a spring 18. When button 17 is pressed against spring 18, cleaning needle 7 is pressed through the opening in nozzle 14 and cleans it, whereas in its rest position it remains in a retracted position.
To light up the burner there is preferably utilized a so-called ceramic wick located in the ignition hollow. This wick is maαe of a ceramic, fuel-absorbing material which is uncovered on both sides toward the surroundings so that only the lower part in the fluid and the upper burn-off surface are open. This ensures a controlled combustion of the lighter fluid beneath the heat generator 2 after ignition.
In the embodiment shown in Figure 3 the solid copper hoops 2 provide for quick and rapid heat conduction to nozzle holder 4, at the same time as the heat from the burning lighter fluid will to a certain degree heat up feed line 1 in this section.
The heat emerging from heat generator 2 will then heat up the nozzle holder and the nozzle, thus facilitating gasification/vaporization of fuel from fuel tank 9 under pressure, which in turn ensures an effective blending of air 19 and fuel 20 in a mixing chamber 21 of approximately a venturi type for distribution to burner ring 8.
A preferred embodiment of the heat generator is shown in Figures 4 and 5. Here the heat generator consists, as mentioned above, of a tube 23 having flanges 15, slid onto feed line 16 and positioned over the burning hollow 12 having the ceramic wick, which is not shown.
The procedure for ignition is the same as above, and the effect here can be increased by placing a copper wire 16 in feed tube 1.
This has advantageously proven to permit a so-to-speak complete elimination of any propensity for flash burning due to a variable rate of gasification or vaporization. In addition, the upstream copper wires (16), and particularly those in the area around the burner ring (8), may be laid in a steel wire in a manner known per se.
For use as a cooking apparatus the burner is equipped, in a manner known per se, with supports 22 for the cooking vessel that are capable of being swung inward or lowered.
With the burner of the invention, a great number of advantages are achieved in relation to known technology.
The simplified ignition with full utilization of heat for preheating of fuel is a substantial improvement in relation to the known art, and it is also safer since the chance of spillage and unintentional fire is substantially reduced.
The improved gasification/vaporization from the nozzle and the illustrated design of the mixing chamber provide for sufficient infusion of air above the stoichiometrically required amount.
An advantage of the illustrated device is that exhaust gases from burning off the lighter fluid in the ignition hollow will not be sucked into the mixing chamber for fuel and air, but disappears over the heat shield into the atmosphere together with the exhaust gases from the burner.
The problem of igniting the burner before the lighter fluid has burned off is thereby avoided.
Furthermore, with the preheating system of the invention there is the advantage that the burner may be re-ignited, after a stoppage of a few moments, due to the stored up heat. Such a stoppage could occur, for example, in connection with changing the fuel container.
With the device of the invention one has thus achieved a substantial advancement in the area of pressure burners of the "Primus" type, especially intended for field purposes, and all the requirements set forth in the introduction have been fulfilled.

Claims

Patent Claims
1.
A device for a feeding and nozzle system for a burner of the Primus type, comprising a feed line (1) near the burner's burner ring (8), characterized by aheat generator (2) located near or on the feed line (1), disposed over an ignition hollow (12) in a heat shield (13) and fixedly connected to a nozzle holder (4, 4'), optionally via the feed line (1), where the nozzle holder further exhibits a through-running passage (5) for fuel and a nozzle (14) having a remote controllable nozzle cleaning wire (7) running centrally therethrough.
2.
The device according to claim 1, characterized in that the heat generator (2) is constructed as hoops of solid copper wire.
3.
The device according to claim 1, characterized in that the heat generator (2) is constructed as a tube (23) having flat, radial ribs (15), placed directly on the feed line
(1).
4.
The device according to claim 3, characterized in that there is, in addition, provided a wire (16), preferably of copper, inside the feed line from the upstream end of the heat generator (2) to near the nozzle holder.
5.
The device according to any one of the claims lto4, characterized in that the ignition hollow (12) is provided with a (not shown) ceramic wick.
PCT/NO1998/000360 1997-12-05 1998-12-03 A device for a feeding and nozzle system for a primus type burner WO1999030085A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU13546/99A AU1354699A (en) 1997-12-05 1998-12-03 A device for a feeding and nozzle system for a primus type burner
CA002312750A CA2312750A1 (en) 1997-12-05 1998-12-03 A device for a feeding and nozzle system for a primus type burner
GB0013228A GB2347208B (en) 1997-12-05 1998-12-03 A device for a feeding and nozzle system for a primus type burner
SE0001983A SE0001983L (en) 1997-12-05 2000-05-26 Apparatus for a feed and nozzle system for a burner of the type used in compressed air-powered kerosene kitchens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO975736A NO306483B1 (en) 1997-12-05 1997-12-05 Device by the feed and nozzle system for a primer-type burner
NO19975736 1997-12-05

Publications (1)

Publication Number Publication Date
WO1999030085A1 true WO1999030085A1 (en) 1999-06-17

Family

ID=19901419

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1998/000360 WO1999030085A1 (en) 1997-12-05 1998-12-03 A device for a feeding and nozzle system for a primus type burner

Country Status (6)

Country Link
AU (1) AU1354699A (en)
CA (1) CA2312750A1 (en)
GB (1) GB2347208B (en)
NO (1) NO306483B1 (en)
SE (1) SE0001983L (en)
WO (1) WO1999030085A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1348910A1 (en) * 2002-03-28 2003-10-01 BS Manufacturing Limited Compact stove
WO2003083368A2 (en) * 2002-03-28 2003-10-09 Bs Manufacturing Limited A Compact Stove.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE429139B (en) * 1981-12-22 1983-08-15 Primus Sievert Ab DEVICE FOR A CAMPING COOK OPERATION WITH CONDENSED PETROLEUM GAS
DE3900333C1 (en) * 1989-01-07 1990-05-17 Marsteller & Killmann Gmbh & Co Kg, 4300 Essen, De Cooking appliance which can be run either on gas or liquid fuel
EP0477705A2 (en) * 1990-09-22 1992-04-01 Joh. Vaillant GmbH u. Co. Heating boiler
US5513624A (en) * 1994-06-29 1996-05-07 Mountain Safety Research Weighted needle for cleaning fuel orifice of liquid fuel component stove
US5803727A (en) * 1997-01-30 1998-09-08 The Coleman Company, Inc. Burner assembly for burning appliances

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE429139B (en) * 1981-12-22 1983-08-15 Primus Sievert Ab DEVICE FOR A CAMPING COOK OPERATION WITH CONDENSED PETROLEUM GAS
DE3900333C1 (en) * 1989-01-07 1990-05-17 Marsteller & Killmann Gmbh & Co Kg, 4300 Essen, De Cooking appliance which can be run either on gas or liquid fuel
EP0477705A2 (en) * 1990-09-22 1992-04-01 Joh. Vaillant GmbH u. Co. Heating boiler
US5513624A (en) * 1994-06-29 1996-05-07 Mountain Safety Research Weighted needle for cleaning fuel orifice of liquid fuel component stove
US5803727A (en) * 1997-01-30 1998-09-08 The Coleman Company, Inc. Burner assembly for burning appliances

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1348910A1 (en) * 2002-03-28 2003-10-01 BS Manufacturing Limited Compact stove
WO2003083368A2 (en) * 2002-03-28 2003-10-09 Bs Manufacturing Limited A Compact Stove.
WO2003083368A3 (en) * 2002-03-28 2004-03-25 Bs Mfg Ltd A Compact Stove.

Also Published As

Publication number Publication date
NO975736L (en) 1999-06-07
GB2347208A (en) 2000-08-30
NO975736D0 (en) 1997-12-05
NO306483B1 (en) 1999-11-08
AU1354699A (en) 1999-06-28
GB0013228D0 (en) 2000-07-19
GB2347208B (en) 2002-01-02
SE0001983D0 (en) 2000-05-26
SE0001983L (en) 2000-05-26
CA2312750A1 (en) 1999-06-17

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