KR20080072665A - Liquid fuel backpacking stove - Google Patents

Abstract

A stove (20) having a burner bottom (34) with an integrated trough (46) for catching fuel. The trough (46) may be formed, for example, by a section that is captured between a raised center (44) of the burner bottom (34) and a raised outer annular rim (42) of the burner bottom. A burner top (36) for the stove (20) includes a plate (38) that directs fuel contacting the burner top down into the trough (46) in the burner bottom (34). This plate (38) may be, for example, a plate having a downward-turned outer annular lip (39) that extends toward the trough (46). A fuel tip (50) is provided that extends down into a liquid fuel tank (26) for the stove (20). The fuel tip (50) includes a piston (58) that is moveable to provide a lean fuel, air-fuel mixture upon start of the stove, and a rich fuel, air-fuel mixture after the stove is started.

Description

Liquid Fuel Backpacking Stove {LIQUID FUEL BACKPACKING STOVE}

Reference to related application

This application claims priority to US Provisional Application No. 60 / 727,517, filed Oct. 17, 2005, and US Provisional Application No. 60 / 762,615, filed January 27, 2006, both of which are incorporated herein by reference. Incorporated by reference in the specification.

The present invention relates to a liquid fuel burner device, and more particularly, to a backpacking and camping stove.

Outdoor and camping liquid fuel camp stoves and lanterns are well known and described, for example, in US Pat. No. 3,876,364, owned by The Coleman Company, Inc., the assignee of the present invention. The liquid fuel used in such camp stoves and lanterns may be, for example, Coleman brand fuel, white gas, unleaded gasoline or other liquid fuels.

In conventional liquid fuel camp stoves, such as those provided by The Coleman Company, Inc., fuel is stored in pressure vessels or fuel tanks where air is pumped under pressure. As described in US Pat. No. 3,876,364, the fuel tank is provided with an immersion tube extending substantially near the bottom of the tank. The immersion tube is closed at the bottom except for the small diameter orifice which allows fuel to enter. The immersion tube has an internal conduit that opens at the bottom and communicates with the top of the pressure vessel above the maximum fuel level. The immersion tube orifice may be partially blocked by the insertion of a needle properly connected to the fuel control system. The needle partially blocks the orifice during the ignition cycle and is removed to leave the orifice unblocked during the normal combustion cycle. This partial blockage during the ignition cycle causes air to be drawn from the opening at the top of the pressure vessel down the space between the inner and outer conduits of the immersion tube. As this air carries fuel up to the inner conduit, a fuel lean mixture of fuel and air is produced to enhance ignition. Since the fuel of the mixture does not vaporize and therefore has to be mixed with a large amount of air for combustion, a fuel lean mixture is necessary in the initial ignition. The performance mixture is then passed through a generator which is connected to the immersion tube by a fuel control system. The generator is a metal tube passing over the burner of the stove into a venturi assembly connected to the burner. The generator is heated by the burner's flame when the burner is running. The fuel is discharged at high speed from the orifice or injected at the end of the generator into the venturi, and the air is fed to the burner with a performance mixture, such as a combustible mixture for combustion, to be mixed and sprayed.

After the burner is operated for an initial cycle and the generator is sufficiently heated, the fuel running through the generator is vaporized. As such, after the generator is heated, the fuel may expand and feed the less lean mixture. At this point, the needle may be removed from blocking the passage.

In US Pat. No. 3,876,364, the needle restriction is actuated by the rotation of the fuel control knob. In other instruments, levers are used to adjust the instrument for start-up and operation. The lever is moved up to start and then down to start up.

Conventional structures for allowing the liquid fuel apparatus to ignite when the generator is cold are referred to as "immediate ignition systems". Liquid fuel appliances that do not include an instant ignition system require some other means for heating the generator during startup, such as liquid priming fuel, or a heating paste. In any case, the ignition process is difficult for the user. Often, the user may forget to change the needle (eg, move the lever) after the ignition process. If liquid priming fuel is used, subsequent processes can often take a few minutes, resulting in blacking of the stove bottom.

The following presents a brief summary of certain embodiments of the invention in order to provide a basic understanding of the invention. This summary is not an extensive overview of the invention. It is not intended to represent key / critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some embodiments of the invention in a simplified form as a prelude to the more detailed description that is presented later.

According to one embodiment, a stove is provided having a burner bottom with an integrated trough for catching fuel during the burner ignition step. For example, the groove may be formed by a section captured between the raised center of the bottom of the burner and the raised outer annular rim of the bottom of the burner.

According to another embodiment, the burner top for the stove includes a plate that contacts the top of the burner and directs the fuel under the groove in the bottom of the burner. For example, the plate may be a plate having a downwardly curved outer annular lip extending towards the groove.

According to another embodiment, a fuel tip is provided that extends below the liquid fuel tank for the stove. The fuel tip includes a piston moveable to provide lean air to the fuel mixture at the start of the stove and less lean air to the fuel mixture after the stove is started.

According to another embodiment, a stove is provided that includes a retractable fan spaced from the burner. The tube or other conduit extends between the retractable pan and the burner. The generator feeds into the retractable fan. A venturi tube may be connected between the closing pan and the generator. The closed fan serves as a reservoir for the starter fuel of the stove. The fan is heated by the generator to allow fuel to evaporate and burn in the burner.

Other features of the present invention will become apparent from the following detailed description when taken in conjunction with the accompanying drawings.

1 is a side perspective view of a stove according to an embodiment of the present invention.

FIG. 2 is an exploded side perspective view of the burner assembly for the stove of FIG. 1. FIG.

3 is a side perspective view of a burner bottom for the burner assembly of FIG.

4 is a cross-sectional view of the burner assembly of FIG.

5 is a plan view of a fuel tip and air inlet tube for use with the stove of FIG. 1, according to one embodiment.

6 is an exploded side perspective view of the fuel tip of FIG.

7 is a cross-sectional view of the fuel tip of FIG. 5 with the piston in the stove operating position, according to one embodiment.

8 is a cross-sectional view of the fuel tip of FIG. 5 with the piston in the stove start position, according to one embodiment.

9 is a double burner stove in accordance with one embodiment of the present invention.

10 is another embodiment of a piston for use with the fuel tip of FIG. 5 in accordance with one embodiment.

11 is another embodiment of a stove.

In the following description, various embodiments of the present invention will be described. For purposes of explanation, specific structures and details are set forth in order to provide a thorough understanding of the embodiments. However, it will also be apparent to one skilled in the art that the present invention may be practiced without the specific members. In addition, well-known features may be omitted or simplified in order not to obscure the description of the embodiments.

Referring to the drawings in which like reference numerals refer to like parts throughout the several views, FIG. 1 shows a backpacking stove 20 in accordance with one embodiment of the present invention. In the embodiment shown, the backpacking stove 20 comprises a mushroom burner 22 which is connected to the liquid fuel tank 26 by a fuel supply line 24. The liquid fuel supply line 24 is connected to the washing needle control valve 27, which in turn is connected to the generator 28. The generator 28 is wound around and up to the mushroom burner 22 so that it can be heated by the flame from the burner in a manner known in the art. The generator 28 then extends downwards downwards in the bottom of the stove 20 and upwards in a vertical direction (FIG. 4) downwards of the mushroom burner 22.

As can be seen in FIG. 2, the lower heat shield 30 (removed in FIG. 4 to show in detail) is positioned below the mushroom burner 22. The burner bushing 32, which serves as a venturi tube for the backpacking stove 20, extends upwardly through the center of the heat shield 30. Burner bushing 32 extends slightly through the opening of burner bottom 34 which is aligned directly above heat shield 30. Burner top 36 is positioned above burner bottom 34.

According to one embodiment, the plate 38 (FIG. 4) having the circumferential lip 39 rolled downward is centered on the lower side of the burner top 36 and the circumferential lip 39 rolled downward. Is arranged to extend. The plate 38 is connected to or integrally formed with the burner top 36. Alternatively, the lip 39 may be formed at the bottom of the burner top 36 without the use of a plate structure.

Referring to Figure 3, the burner bottom 34 of the embodiment shown in the drawing includes an outer rim 40. The annular ridge 42 is positioned just inside the outer rim. Burner bottom 34 also includes raised center 44. A groove 46 is formed between the annular ridge 42 and the raised center 44. In one embodiment, the downwardly circumferential lip 39 is arranged such that the lip 39 is guided downward toward the groove 46. The purpose of this arrangement is described below.

5, a fuel tip 50 is provided in accordance with one embodiment of the present invention. In the embodiment shown in FIG. 5, the fuel tip 50 is in a manner known in the art, when the liquid fuel tank is full, an air inlet at which one end is positioned above the fuel level of the liquid fuel tank 26. It is attached to the tube 52.

An exploded perspective view of the fuel tip 50 is shown in FIG. 6. As shown, the fuel tip 50 includes a body 54 and a plug 56 screwed to one end of the body 54. The piston 58 is suspended in the main body 54 as will be described later. The spring 60 is positioned to bias the piston 58 towards the plug 56.

As shown in FIG. 7, the body 54 includes a center bore 62. The threaded fuel end 64 is positioned on one end of the center bore 62 and the outlet 66 is positioned on the other end. Air inlet 68 is positioned between threaded fuel end 64 and outlet 66 and enters bore 62 at right angles to the longitudinal axis of the bore. The air inlet 68 is attached to the air inlet tube 52. Similarly, outlet 66 is connected to conduit 70 (FIG. 1) that provides air and fuel mixture to fuel supply line 24, as described further below.

Plug 56 is threaded to threaded fuel end 54. The rear slot 72 is provided on the back of the plug 56 as a tool receiving pattern, for example to receive the end of the screw driver. Other patterns may be used. The front slot 74 is positioned on the other end of the plug. Plug 56 includes a bore 76 extending through its central portion. The bore includes a narrow opening 78 positioned toward the front of the bore 76 (right side of FIG. 7).

The piston 58 includes a front slot 80. The narrow portion 81 is formed in front of the piston 58 so that the shoulder 82 is formed. The spring 60 extends against the shoulder 82 above the narrow portion 81. Stem 84 extends from the rear of piston 58. The stem 84 includes a narrow portion 86 at the front end and a wide portion 88 at the rear end.

Stem 84 and piston 58 are arranged and configured such that piston 58 can move longitudinally in bore 62 of body 54. During this movement, the stem 84 moves along the narrow opening 78 of the plug 56.

As is known, stove burners, such as mushroom burners 22, require more air than fuel at the start for the suction of the burners. However, at the start, a fuel line, such as fuel supply line 24, is full of fuel, causing too much initial stream from the fuel supply line in the fuel. As discussed below, the backpacking stove 20 includes both the groove 46 of the burner bottom 34 and the novel fuel tip 50 to address this problem.

In operation, the air in the liquid fuel tank 26 is compressed by manual pumping of the pump 90 (FIG. 1), for example in a manner known in the art. This compressed air (A in FIG. 1) is in fluid communication with the air inlet tube 52 and the air inlet 68 of the body 54 of the fuel tip 50. Air enters the fuel tip 50 through this air inlet 68. The back of the plug 56 communicates with the liquid fuel of the tank (F in FIG. 1), and the fuel flows through the bore 76 of the plug 56 to the fuel tip 50.

At the start of burner 22, since there is no back pressure in fuel supply line 24, the air pressure from liquid fuel tank 26 extends through air inlet 68 and presses against the back side of piston 58. This moves the piston 58 to the right against the pressure of the spring 60, as in the position shown in FIG. In this position, the wide portion 88 of the stem 84 of the piston 58 is received aligned with the narrow opening 78 of the plug 56. Thus, the wide portion 88 of the stem 84 effectively closes most of the narrow openings 78 to limit fuel flow to the central bore 62 of the body 54. The gap between the inner wall of the narrow opening 78 and the outer surface of the wide portion 88 of the stem 84 may be sized to adequately intake fuel when the piston is in this position.

According to one embodiment, when the piston 58 is in the position in FIG. 8, the spring 60 is fully compressed. Thus, the flow of air and fuel around the piston 58 and through the spring 60 may be limited or entirely blocked. For this reason, the front slot 80 is provided on the front of the piston 58. The air and fuel mixture may flow into the front slot 80 and through the center of the compressed spring 60 and may easily reach and exit the outlet 66.

Because the wide portion 88 of the stem 84 is positioned in the narrow opening 78, the air and fuel mixture flowing to the outlet 66 is very sparse. This mixture, which is provided in the wide portion 88 of the stem 84 positioned in the narrow opening 78, is referred to herein as the "start position" fuel mixture.

At initial start-up of the backpacking stove 20, the user pumps the pump 90 to compress the fuel tank 26 and runs fuel, for example through a valve on the fuel tank (not shown, but known), Ignite the mushroom burner (22). Although the very fuel lean mixture is provided by the fuel tip when the fuel tip is in the starting position, as described above, there may be a significant amount of fuel in the liquid fuel supply line 24 such that the very fuel rich mixture is mushroom-like. To get to burner 22 first. When the valve is opened on the fuel tank, the fuel already in the line 24 is pressurized through the fuel supply line 24 and the generator 28 by air pressure from the liquid fuel tank 56. The amount of fuel in the line may be minimized by having obstacles in the line, such as rubber rods. As the fuel flows rapidly through the generator 28 and burner bushing 32, the fuel strikes the plate 38.

The fuel flows across the plate 38 and outward of the circumferential peripheral ribs 39 that are downward. The fuel then falls downward into the grooves 46 downwardly from the outer peripheral lip 39.

Some fuel is ignited as the fuel enters the mushroom burner 22 and the ignited fuel facilitates the initiation of the backpacking stove 20. This initial flame promotes heating of the generator 28.

Heating of the generator 28 causes vaporization of the fuel of the generator. As the fuel vaporizes, the fuel takes more volume in the generator 28 and the back pressure increases at the outlet 66 of the fuel supply line 24. As the back pressure increases, the pressure becomes equal across the piston 58, and the spring 60 drives the piston back to the position shown in FIG. In this position, the narrow portion 86 of the stem 84 is aligned with the narrow opening 78 of the plug 56 and the fuel flowing through the plug 56 and the fuel flowing around the stem 58 Is increased. When the piston 58 is on the left side as shown in FIG. 7, the rear portion of the piston is positioned in close contact with or close to the front portion of the plug 56. Thus, it is possible that the piston 58 may block fuel flow through the plug. In order to allow free fuel flow, the front slot 74 allows fuel to flow around the piston 58, through the slot, outward through the narrow opening 78.

Narrow 86 may be sized appropriately to allow this fuel to flow at a desired rate. The increase in fuel flow results in a richer air and fuel mixture that is supplied to the outlet 66 and fuel supply line 24 during normal operation of the backpacking stove 20.

After the generator 28 is heated and operated, the fuel in the grooves 46 is vaporized by heating of the burner 22 through the flame. As a result, all fuel is vaporized from the grooves 46 and combustion only takes place from the fuel supplied via the fuel supply line 24. At this point, the backpacking stove 20 is operated with normal operating fuel flow.

The unique fuel tip 50 offers many advantages. First, the air and fuel mixture is automatically adjusted as a result of the back pressure provided by the generator 28. Thus, unlike in the prior art device, there is no need for the user to operate the needle or lever after the initial initiation of the backpacking stove, or to manually change the operation of the backpacking stove 20. In addition, the fuel tip 50 may be adjusted according to the condition. As an example, during a windy state, flames may be exhausted in direct contact with generator 28 so that the generator is no longer adequately heated for vaporization of the fuel. In this situation, in many prior art stoves, because the fuel mixture is no longer vaporized, it is richer and excess fuel is provided to the burner. A lean fuel mixture must be supplied to recover by using an initiation process, such as flipping the lever, usually.

In contrast, if the generator 28 of the present invention is no longer adequately heated, then the back pressure drops and the piston 58 freely moves back to the position shown in FIG. The initiation process may then continue with the lean fuel mixture until the generator is heated back to an appropriate level such that the back pressure is sufficient to move the piston back to the position shown in FIG.

As can be appreciated, the piston 58 moves to the position shown in FIG. 8 when the air pressure on the back of the piston exceeds the biasing force of the spring 60 and the back pressure from the fuel line 24. On the other hand, the piston 58 moves to the position shown in FIG. 7 when the back pressure from the fuel line 24 and the biasing force of the spring 60 exceed the air pressure on the back of the piston from the air inlet 68. .

Those skilled in the art may select the spring constant of the spring 60 and may properly arrange the piston 58 to provide the desired actuation of the fuel tip 50. Without tipping of the spring 60, for example by providing a free floating piston, the fuel tip 50 may be rearranged along the piston 58 so that operation can be performed. Also, the center bore 62 may be rearranged relative to the piston 58 to provide another pressure against the piston.

In one embodiment, the air pressure in fuel tank 26 is typically 23 in ² / lb. During optimal operation of the stove 20, the back pressure in the fuel line 24 may be slightly less than this amount, for example, the back pressure is 22 in ² / lb.

As can be appreciated, the amount of back pressure of the fuel line 24 required to move the piston 58 to the position of FIG. 7 can vary based on the amount of air pressure of the tank 26. That is, if the tank is pumped to a higher pressure, more back pressure is required to move the piston 58 to the position shown in FIG. However, upon initial ignition of the stove 20, the back pressure is minimal and therefore the piston is moved to the position of FIG. As the stove heats up and the back pressure increases, the back pressure eventually rises high enough to overcome the pressure differential to move the piston 58 along with the spring 60 to the position shown in FIG.

According to another embodiment shown in FIG. 10, an O-ring 98 (FIG. 10) may be provided on the stem side of the piston 58. This O-ring 98 serves as a bumper for the piston 58 when the piston moves to the closed position shown in FIG. As such, any clicking noise that may be generated by the piston 58 moving relative to the interior of the valve body may be reduced or eliminated by the cushioning effect of the O-ring 98.

9 shows a double burner stove 100 in accordance with one embodiment of the present invention. Burner stove 100 includes a fuel supply line 102 similar to fuel supply line 24 but subsequent to fuel manifold 104. Valves 106 and 108 are provided on opposite sides of manifold 104 to fuel fuel lines 110 and 112 separated on opposite sides of manifold 104. These fuel lines feed two separate burners 114, 116.

The fuel tip 50 of the present invention allows the double burner stove 100 to be operated. Without such a fuel tip, after another burner has already been operated, an attempt to ignite one of the burners 114, 116 may already be activated and possibly discharge it, resulting in excessive lean air and fuel mixture in the burner. The fuel tip 50 allows for automatic adjustment to this situation so that the air and fuel mixture for each burner 114, 116 is maintained as needed. Also, the air does not move continuously through the line, which will require constant pumping.

As an example, if burner 114 is operated and burner 116 is ignited, the lack of fuel pressure by the generator for burner 116 causes fuel tip 50 to be moved to the starting position and fuel lean mixture to provide. After burner 116 is operated, fuel tip 50 returns to the operating position. The fuel tip 50 operates as described above when the first burners of the two burners 114, 116 are ignited, or both are ignited simultaneously.

11 shows another embodiment of the stove 200. Stove 200 includes a generator 202 similar to generator 28. However, instead of feeding it to the bottom of the burner, the generator 202 feeds downwardly facing the venturi tube 204. The venturi tube 204 is in turn attached to the top of the retractable fan 206. The upwardly extending burner tube 208 extends from the opposite side of the retractable fan 206 to the burner 210.

The arrangement of the stove 200 shown in FIG. 11 is advantageous in that it provides a location where fuel will accumulate when the enclosed fan 206 starts the initiation process. In addition, the length of the burner tube 208 spaces this fuel from the combustion of the burner 210, so that the fuel in the enclosed fan 206 is not used as part of the initial combustion process.

Upon initial ignition of the stove 200, the fuel in the fuel line to the stove (described above) is directed downward through the venturi tube 204 to the enclosed fan 206. This fuel accumulates in the fan 206, and some fuel mixes with air flowing upwardly through the burner tube 208 to the burner 210. Because a large amount of liquid fuel is retained in the enclosed fan 206, this air and fuel mixture is thinner than the air and fuel mixture when ignited by the user and usually initially started.

Because the air and fuel mixture is sparse, the flame from burner 210 is hotter and provides faster heating of generator 202. The generator then operates in conjunction with fuel tip 50 to provide appropriate fuel to burner 210.

As generator 202 heats up, venturi tube 204 and retractable fan 206 also heat up. Each of these items may be made of a thermally conductive material to enhance this process. Fuel in enclosed fan 206 is vaporized by heating and mixed with other fuel in the system. This fuel is usually eventually turned off within a short time after the stove ignition.

The embodiment of the stove 200 shown in FIG. 11 is a very efficient model for initiation. When used with fuel tip 50, a user may experience very fast ignition of stove 200 without having to pump fuel bottles, turn on gas, and ignite the stove. The stove must be ready for use within one or two minutes.

Receiving fan 206 may be positioned at a location other than the location shown in FIG. 11, but may also capture excess fuel in the fuel line and allow fuel tank 26 to introduce proper air and fuel mixture through the burner. And a fuel line between and burner 210. In one embodiment, the enclosed fan 206 is heated by the burner during combustion so that the liquid fuel trapped in the enclosed fan 206 can be vaporized more quickly. As an example, as shown in FIG. 11, the burner may be thermally connected to the enclosed fan 206 to heat the fan through conduction, but the enclosed fan may alternatively be heated via radiation.

Primary heat to the enclosed fan 206 is provided through the generator 202. Hot gas flowing from the generator 202 promotes vaporization of the fuel in the enclosed fan 202. Since the retractable fan attaches a large number of metal parts, such as the legs for the stove 200 which dissipates heat, vaporization is slightly slowed down. In one embodiment, a high thermal conductivity fan (not shown) may be arranged in the retractable fan. Highly conductive fans may heat faster than the enclosed fan 206 because the increased thermal conductivity may cause that portion to heat up before dissipating heat to other portions of the stove 200.

Also, although referred to herein as a "receiving fan," any structure that can capture excess fuel in the fuel line between fuel tank 26 and burner 210 may be used. In one embodiment, the structure is housed so that fuel and air do not leak and flow to the burner.

The arrangement of the stove 200 shown in FIG. 11 may be used for a stove with two burners. Similar to the embodiment shown in FIG. 9, such a stove would benefit from the use of the fuel tip 50, and would produce an easy to ignite stove that could maintain one or two flames through operation of the fuel tip 50. Will provide.

Other variations exist within the spirit of the invention. Accordingly, various modifications and alternative arrangements may be made to the invention, although certain illustrated embodiments are shown in the drawings and described in detail above. However, it is not intended to limit the invention to the particular forms or forms disclosed, but on the contrary, is defined in the appended claims, including all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention. You will understand that it is intended to be.

All references, including publications, patent applications, and patents, cited herein, are to the same extent as if each reference was individually and specifically indicated to be incorporated by reference, and the entirety herein is incorporated by reference. It is incorporated herein by reference.

Unless otherwise indicated herein or otherwise clearly contradicted by context, the terms "a", "an", "the" in the context of the present invention (particularly in the context of the claims below) And similar indications are to be interpreted to include both the singular and the plural. Unless stated otherwise, the terms “comprising”, “having”, “including” and “containing” are open terms (ie, “including but not limited to”). Do not ". Anything that intervenes, the term "connected" should be interpreted to be contained, attached, and also joined together in part or in whole. Unless otherwise indicated herein, the specification of a range of values merely serves as a delivery method for individually quoting each distinct value within the range, and each distinct value is incorporated herein as described separately. Unless otherwise indicated herein or otherwise clearly contradicted by context, all methods described herein may be performed in any suitable order. The use of any and all examples, or exemplary language (eg, “such as”) provided herein, is intended to make the embodiments of the invention more clear, unless otherwise claimed, Do not limit the category. No language in this specification should be construed as indicating any non-claimed element essential to the practice of the invention.

Preferred embodiments of the invention are described herein, including the best mode known to the inventors for carrying out the invention. Modifications of these preferred embodiments may become apparent to those skilled in the art upon reading the above description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors believe that the invention will be practiced otherwise than as specifically described herein. Accordingly, the invention includes all modifications and equivalents of the subject matter described in the appended claims, as permitted by applicable law. Also, unless otherwise indicated herein or otherwise clearly contradicted by context, any combination of the aforementioned elements of all possible variations is included in the present invention.

Claims (21)

It is a stove, A burner to provide combustion, A fuel canister including a liquid fuel and a compressed gas therein; A fuel conduit extending between the burner and the fuel canister, A fuel tip in the fuel canister and in fluid communication with the compressed gas, the liquid fuel, and the fuel conduit, The fuel tip automatically provides a first mixture of liquid fuel and compressed gas to the burner through the fuel conduit in response to the back pressure of the fuel conduit above a certain pressure, and the fuel conduit in response to the back pressure of the fuel conduit above a certain pressure. A stove arranged and configured to automatically provide a second mixture of liquid fuel and compressed gas to the burner through, the first mixture having a thinner fuel mixture than the second mixture. The stove of claim 1 comprising at least two burners. The stove of claim 1 wherein the compressed gas is compressed air. The stove of claim 1, wherein the fuel tip includes a device for regulating fuel flow to the fuel tip, and the device is configured to flow more fuel to the fuel tip when the back pressure of the fuel line exceeds a certain pressure. The stove of claim 1 wherein the fuel tip comprises a piston and the piston is arranged such that movement of the piston between the first and second pistons reduces fuel flow to the fuel tip. 6. The stove of claim 5, wherein the compressed gas is in fluid communication with one side of the piston and biases the piston towards the second position. The stove of claim 6 wherein the fuel line is in fluid communication with the opposite side of the piston such that the back pressure of the fuel line biases the piston towards the first position. 8. The stove of claim 7, further comprising a spring for biasing the piston towards the first position. The stove of claim 1, wherein the specific pressure may vary with the pressure of the compressed gas. The method of claim 1, wherein the burner, With burner top, A stove comprising a burner bottom having a groove therein for trapping excess fuel during start of the burner. 12. The fuel injector of claim 10, further comprising a fuel inlet from the bottom of the burner and a downwardly slit lip on the top of the burner surrounding the fuel inlet, wherein the downwardly lip is arranged to guide fuel entering the fuel inlet and towards the grooves. Stove that engages the top of the burner to flow downwardly along the rib. The stove of claim 1, further comprising a structure capable of capturing excess fuel in a fuel line between the fuel canister and the burner. 13. The stove of claim 12, wherein the structure comprises a retractable structure. The stove of claim 13, wherein the structure comprises a retractable pan spaced from the bottom of the burner. 15. The stove of claim 14, wherein the enclosed pan is heated by the flame of the burner. 16. The stove of claim 15, wherein heating of the enclosed pan by the flame comprises conduction between the enclosed pan and the burner. It is a stove, A burner to provide combustion, With fuel canisters, A fuel conduit extending between the burner and the fuel canister, The burner includes a burner top and a burner bottom having a groove therein for trapping excess fuel during initiation of the burner, wherein the fuel canister includes liquid fuel and compressed air therein. 18. The fuel inlet of claim 17, further comprising a fuel inlet from a fuel conduit through the bottom of the burner and a downwardly slit lip on the top of the burner surrounding the fuel inlet, the downwardly lip being arranged to guide fuel entering the fuel inlet. And a stove that engages the top of the burner to flow along the ribs downwardly towards the groove. It is a stove, A burner to provide combustion, A fuel canister containing liquid fuel and compressed air therein; A fuel conduit extending between the burner and the fuel canister, A stove comprising a retractable fan spaced from the bottom of the burner capable of capturing excess fuel in the fuel conduit between the fuel canister and the burner. 20. The stove of claim 19, wherein the enclosed pan is heated by the flame of the burner. 20. The stove of claim 19, wherein heating of the enclosed pan by the flame includes conduction between the enclosed pan and the burner.

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