KR20070089684A - Liquid fuel burner - Google Patents

Abstract

The invention provides a liquid fuel burner (110) comprising a burner head (114), a liquid fuel reservoir (116) for containing a liquid fuel, and a pump (118) for pumping the liquid fuel from the reservoir (116) to the burner head (114). The pump (118) includes a cylinder (140), and a piston (142) which is displaceable relative to the cylinder (140) so that liquid fuel is drawn into the cylinder (140) when the piston and cylinder are displaced in a first direction relative to one another, and the liquid fuel is pumped out of the cylinder (140) when the piston and cylinder are displaced in a second, opposite direction relative to one another. The pump (118) also includes an inlet valve (144) for allowing liquid fuel to be drawn into the cylinder (140) from the reservoir (116), an outlet valve (146) for allowing liquid fuel to be pumped out of the cylinder (140) to the burner head (114), and a displaceable mass which due to its weight applies sufficient force to cause displacement of the piston (142) relative to the cylinder (140) in the second direction, thereby to pump liquid fuel out of the cylinder (140) to the burner head (114).

Description

Liquid Fuel Burner {LIQUID FUEL BURNER}

The present invention relates to a burner, more particularly a liquid fuel burner that can be used in devices such as stoves, hot water heaters, heaters and the like. The invention also relates to an apparatus for delivering liquid fuel to a burner head of a liquid fuel burner.

Various and different types of liquid fuel burners are known. In some of these devices, capillary action causes the liquid fuel to be drawn into the wick where the liquid fuel is burned, while in other applications air pressure is applied to the liquid fuel to displace the fuel towards the burner head.

Although devices such as liquid fuel stoves are often preferred as electrical devices because they are not easily accessible or relatively expensive for the electrical devices to operate, many known liquid fuel burners are relatively insecure, or very efficient. Not high.

It is an object of the present invention to provide an alternative liquid fuel burner which is generally safe and efficient.

Another object of the present invention is to provide a liquid fuel burner which is relatively easy to use.

According to the present invention, a burner head; A liquid fuel reservoir containing liquid fuel; And a pump for pumping liquid fuel from the reservoir to the burner head, the pump comprising: a cylinder; piston; An inlet valve for sucking liquid fuel from the reservoir into the cylinder; A discharge valve for pumping liquid fuel from the cylinder to the burner head; And a displaceable mass, wherein the piston is such that when the piston and the cylinder are displaced in a first direction relative to each other, the liquid fuel is drawn into the cylinder, and the piston and the cylinder are opposite relative to each other. When displaced in the second direction of, the liquid fuel is displaceable with respect to the cylinder such that the liquid fuel is pumped from the cylinder, and the displaceable mass displaces the piston relative to the cylinder due to weight. A liquid fuel burner is provided that applies sufficient force to pump liquid fuel from the cylinder to the burner head.

Preferably, the inlet valve is a one-way valve that allows liquid fuel into the cylinder and the discharge valve is a one-way valve that allows liquid fuel from the cylinder.

In one embodiment of the invention, the piston is displaceable within the cylinder towards the raised state to suck liquid fuel into the cylinder and displaceable toward the lowered state to pump liquid fuel from the cylinder. Do. In this embodiment, the piston is attached to the burner head via a piston tube, and the piston may form an opening allowing fluid communication between the cylinder and the piston tube.

The ratio of displacement of the piston relative to the cylinder and thus the rate at which liquid fuel is pumped from the cylinder can be adjusted by a control mechanism that applies a variable resistance to displacement of the piston relative to the cylinder.

The control mechanism includes an adjustment screw that applies a variable resistance to the displacement of the piston tube.

In one aspect of the present invention, the piston tube is disposed to pass through the bush, and the adjustment screw is screwed into the bush to engage the piston tube.

The cylinder may be located in the liquid fuel reservoir, in which case the cylinder may be in communication with the reservoir via the inlet valve and filter.

In one embodiment of the invention, the inlet valve and the outlet valve each comprise a valve closure, wherein the valve closure allows the valve closure to allow one-way flow of liquid fuel through the valve in normal operation. It is movable relative to the valve seat between an open position spaced from the valve seat and a closed position that engages the valve seat to prevent liquid fuel flow through the valve. In this embodiment, for each valve, when the liquid fuel burner is tilted to flow liquid fuel through the valve in a direction opposite to the one-direction in normal operation of the liquid fuel flow. It is possible to displace the valve seat.

In another embodiment of the invention, the piston is fixed relative to the frame of the burner and the cylinder is displaceable with respect to the frame of the burner. In this embodiment, the displaceable mass forms part of or attaches to the cylinder, and the piston includes a plurality of ports allowing the liquid fuel to be drawn into or pumped from the cylinder. Can be.

The burner includes a frame formed of a tubular section, and the reservoir may be formed by at least a portion of the tubular section.

In one embodiment, the frame is curved along the side portion of the frame, and when the burner is tilted to one side, the burner includes a stabilizing mass that self-righting the frame. .

The stabilizing mass may be a displaceable mass.

The burner may further comprise a regulator in the form of a valve that controls delivery of liquid fuel to the burner head and thus combustion intensity in the burner head.

In one embodiment of the invention, when the pressure in the burner head drops below a predetermined size, such as, for example, when a flame is extinguished, the burner prevents the flow of liquid fuel to the burner head, and And a double blocking device to prevent back pressure displacement of liquid flow from the cylinder head to the cylinder when the pressure at the burner head rises above a predetermined magnitude.

The present invention provides a pump for pumping liquid fuel from a reservoir to a burner head of a liquid fuel burner, the pump comprising: a cylinder; piston; An inlet valve for sucking liquid fuel from the reservoir into the cylinder; A discharge valve for pumping liquid fuel from the cylinder to the burner head; And a displaceable mass, wherein the piston is such that when the piston and the cylinder are displaced in a first direction relative to each other, the liquid fuel is drawn into the cylinder, and the piston and the cylinder are opposite relative to each other. When displaced in the second direction of, the liquid fuel is displaceable with respect to the cylinder such that the liquid fuel is pumped from the cylinder, and the displaceable mass displaces the piston relative to the cylinder due to weight. With sufficient force, it expands to a pump for pumping liquid fuel from the cylinder to the burner head.

The inlet and outlet valves may each comprise a one-way valve.

The invention will now be described in more detail by way of example only with reference to the accompanying drawings.

1 shows a perspective view of a liquid fuel burner according to one embodiment of the invention,

FIG. 2 shows a partial cross-sectional view of the burner shown in FIG. 1,

3 shows a perspective view of a liquid fuel burner according to another embodiment of the invention,

4 shows a cross-sectional view of the burner of FIG. 3 with the frame omitted and for clarity the head of the burner is lowered, FIG.

5 and 6 show a cross-sectional view similar to FIG. 4 with the burner head in an elevated and inclined state, respectively;

7 shows a cross-sectional view of a portion of a liquid fuel burner according to another embodiment of the present invention with the burner head lowered,

8 and 9 show a cross-sectional view similar to FIG. 7 with the burner head in an elevated and inclined state, respectively.

1 and 2 of the accompanying drawings show a liquid fuel burner according to an embodiment of the present invention. In this embodiment, the liquid fuel burner includes a frame 12, a burner head 14 mounted to the frame, a reservoir for receiving paraffin, and a pump for pumping paraffin from the reservoir 16 to the burner head 14. It is a form of the paraffin stove 10 containing 18.

As representatively shown in FIGS. 1 and 2, frame 12 may include four legs 20 that are joined together at the base 22 of the frame. Leg 20 may be formed of a tubular material, such as, for example, a tubular steel section, such that reservoir 16 is formed inside hollow leg 20. A removable cap 24 may be provided to access the reservoir 16. As shown, the functional upper end of the leg 20 may be connected to a cooking vessel support 26 that supports pots, pans, and the like (not shown). The support 26 typically includes an outer ring 28, an inner ring 30 and four radial rims 32 extending between the outer and inner rings.

2, the pump 18 may include a piston 36 and a cylinder 34 displaceable relative to one another. In this embodiment of the invention, the piston 36 is fixed to the frame 12 and the cylinder 34 is displaceable relative to the frame in the direction of arrows A and B of FIG. The piston 36 allows the inlet valve 40 and the first port 38 to allow the paraffins in the reservoir 16 to be drawn into the cylinder 34, and the paraffins to be pumped from the cylinder 34 to the burner head 14. Shown as including a discharge valve 44 and a second port 42. The fuel line 45 extends from the discharge valve 44 to the burner head 14 and the regulator in the form of a valve 46 on the fuel line 45 is provided with a paraffin supply to the burner head 14 and thus at the burner head. Allows you to adjust the intensity of the flame.

The pump 18 comprises a seal in the form of an elastomeric o-ring 48 between the cylinder 34 and the piston 36. The pump 18 also includes a mass in the form of a ring 50 extending around the cylinder 34, as shown. Ring 50 has a weight sufficient to displace cylinder 34 in the direction of arrow B to pump paraffin in cylinder 34 to burner head 14 under pressure.

Stove 10 also includes a double shut-off device 52 that controls the flow of paraffin to or from burner head 14. As representatively shown in FIG. 2 of the figure, the double blocking device 52 may include a ball 54 displaceable within the chamber 56 between the upper sheet 58 and the lower sheet 60. .

In practice, the reservoir 16 is filled with paraffin by removing one of the removable caps 24 and injecting paraffin into the reservoir. Then, the removable cap 24 is repositioned, and the cylinder 34 is manually displaced in the direction of the arrow A to the position shown in FIG. When the cylinder 34 is displaced upwards, paraffin is drawn into the cylinder through the port 38 and the inlet valve 40. When the cylinder 34 is in the position of FIG. 2, the regulator 46 is opened to allow paraffin flow to the burner head 14. Thereafter, the cylinder 34 is released, and the ring 50 exerts a force on the cylinder to push the cylinder in the direction of the arrow B because of its weight. When the cylinder 34 is displaced downward, the cylinder pressurizes the paraffin inside the cylinder, and the pressurized paraffin is displaced toward the burner head 14 to supply combustion fuel and provide thermal energy to the support 26. . During cooking, the regulator 46 is adjusted to provide the desired heat energy to the support 26, and when cooking is complete, the flame of the burner head 14 is extinguished by closing the regulator 46.

The double blocking device 52 providing a safety function may be conventional in nature. For example, the double blocking device 52 may be designed such that when the cylinder 34 is displaced in the direction of the arrow B, the paraffin can be displaced from the seat 60 and flow into the burner head 14. . However, when the flame suddenly extinguishes and a pressure drop occurs in the burner head, the paraffin displaces the ball 54 toward the seat 58 to close the device to prevent the flow of paraffin to the burner head 14. On the other hand, when the pressure in the burner head 14 rises above a predetermined size, the ball 54 is displaced toward the seat 60 to prevent the flow of paraffin back towards the cylinder 34.

The ring 50 may be arranged to be located below the center of gravity of the stove 10 so that when the stove accidentally tilts to one side, the weight of the ring 50 automatically raises the stove. Alternatively, additional weight may be provided on the piston 34 or elsewhere on the frame 12 to self-righten the stove 10.

In addition, the stove may include a curved handle (not shown) extending upwards from the leg 20 to allow the stove to be carried relatively easily and to prevent the stove from tilting on the cooking vessel support 26.

In an alternative arrangement, the stove 10 may comprise one or more of a paraffin reservoir separate from the frame 12 and a mechanism such as a lever or pulley system, for example for raising the cylinder or piston to an operating position.

It will be appreciated that the mass 50 for applying a force to the cylinder 34 to displace the cylinder in the direction of the arrow B can be formed integrally with or attached to the cylinder. Alternatively, mass 50 may be arranged to force the cylinder through one or more pulleys, levers, and the like. Liquid fuel burners have also been described above with respect to cylinder arrangements and pistons, where the piston 36 is fixed to the frame 12 and the cylinders are displaceable with respect to the frame, but the liquid fuel burners have a cylinder and displaceable pistons fixed with respect to the frame. It will be appreciated that it may include.

3-6 of the accompanying drawings show another embodiment of a liquid fuel burner according to the invention. Similar to the previous embodiment, the liquid fuel burner includes a frame 112, a burner head 114, a reservoir 116, and a pump 118 that pumps paraffin from the reservoir 116 to the burner head 114. It is in the form of a paraffin stove 110.

Frame 112 may include four legs 120 that are connected together at the bottom by base 122. Leg 120 may be formed of a tubular material such as, for example, a tubular steel section in which one pair of legs 120 is connected to another leg pair by tubular frame member 124. The frame 112 may also include a cooking vessel support 126 that supports a pot, pan, etc. (not shown) proximate the burner 114. Support 126 typically includes an outer ring 128 and four rims 130 extending inwardly from the outer ring, as shown. In this embodiment of the present invention, the support 126 is displaceable perpendicular to the leg 120 and includes a guide 132 that engages the leg 120 during relative displacement.

4-6, the reservoir 116 includes an opening 136 for filling paraffin and a closure 138 for closing the opening 136. The pump 118 may include a cylinder 140 that is at least partially immersed in the reservoir 116 and a piston 142 displaceable relative to the cylinder 140. The piston 142 has a seal in the form of an elastomeric o-ring (not shown) for sealing between the piston and the cylinder 140. As representatively shown in FIGS. 4-6, the pump 118 has a one-way valve 144 that allows the paraffins to enter the cylinder 140 within the reservoir 116, and the paraffins exit the cylinder. And a one-way valve 146. One-way valve 144 may include a ball 148 disposed in a seat on dish 150 forming a central opening 152. Similarly, the one-way valve 146 may include a dish 156 having a ball 154 and a central opening 158. As shown, cylinder 140 may communicate with reservoir 116 via one-way valve 144 and filter 160. In this embodiment of the invention, the piston 142 is connected to the burner 114 by a piston tube 162 having a one-way valve 146, and the stove 110 is a piston for the cylinder 140. Adjustment screw 164 that applies a variable resistive force to the displacement of 142. Adjustment screw 164 may be located within bush 166 through which piston tube 162 extends. As can be seen in FIGS. 4-6, the cylinder 140 may communicate with the piston tube 162 via a port 168 in the piston 142.

Indeed, the reservoir 116 is filled with paraffin by removing the closure 138 and injecting paraffin into the reservoir. The closure 138 is then repositioned and the piston 142 is manually displaced relative to the cylinder 140 in the raised state shown in FIG. 5. When the piston 142 is displaced upward along the cylinder 140, the piston pulls the ball 148 of the valve 144 open and passes through the filter 160 and the one-way valve 144. Paraffin is sucked into the cylinder 140. In the raised state of the piston 142, the ball 148 rests on the dish-shaped portion 150 to close the valve 144. Accordingly, subsequent downward displacement of the piston 142 relative to the cylinder 140 causes paraffins in the cylinder to pass through the port 168 into the piston tube 162. The piston 142, piston tube 162 and burner 114 are designed to have a mass sufficient to displace the piston 142 downward relative to the cylinder 140 when the adjustment screw 164 is released from the piston tube. do. Therefore, even when there is no port or the like on the support part 126, the piston 142 may slide downward from the inside of the cylinder 140 to eject the paraffin into the piston tube 162. With a port or the like on the support 126, the adjustment screw is adjusted to preferably flow paraffin through the piston tube 162 if desired.

As the paraffin flows through the piston tube 162, it opens the one-way valve 146 and flows toward the burner head 114 to supply combustion fuel and provide thermal energy to the support 126. During cooking, the screw 164 is adjusted to provide the desired heat energy to the support 126, and when cooking is complete, the burner head (locker) is locked by locking the piston 142 against the cylinder 140 using the adjusting screw 164. The flame in 114 can be extinguished.

In FIG. 6, the burner is tilted to one side while the stove 110 is accidentally tilted, for example. As shown, when the stove is inclined, the ball 148 of the valve 144 rolls out of the opening 152 in the dish-shaped portion 150 to feed paraffin back into the reservoir 116 so that the burner head ( 144 prevents paraffin from flowing, thus extinguishing burner head 114.

7-9 illustrate a stove according to another embodiment of the present invention. In this embodiment, the stove is similar to stove 110 in all respects except for the design of one-way valves 244, 246. Thus, a complete description of the components of the stove, except for the valves 244 and 246, is unnecessary for a full understanding of this embodiment of the present invention. Generally, however, the stove includes a reservoir 216, a cylinder 240, a piston 242, a piston tube 262, and a burner head 214 connected to the piston tube. One-way valve 244 allows paraffin inside cylinder 240 and one-way valve 246 allows paraffin outside cylinder 240. Similar to the embodiment shown in FIGS. 3-6, the stove includes an adjustment screw 264 that adjusts the combustion intensity at the burner head 214 and the filter 260 between the reservoir 216 and the cylinder 240. do.

With particular reference to FIG. 7, one-way valve 244 includes a weight valve stem 248 and a valve seat 250 for receiving the valve stem. Similarly, valve 246 includes weight valve stem 252 and valve seat 254. When the piston 242 is displaced in the raised state shown in FIG. 8 with respect to the cylinder 240, the valve stem 248 is pulled away from the valve seat 250 and the paraffin is drawn into the cylinder 240. Aspirated. When the piston 242 is in the raised position, the valve stem 248 rests on the valve seat 250 to prevent paraffin from flowing back into the reservoir 216. When the piston 242 is displaced downward relative to the cylinder 240, paraffin is released through the piston into the piston tube 262 such that the one-way valve 246 is opened and the paraffin is directed to the burner head 214. Let it flow The burn strength required at burner head 214 can be obtained by adjusting screw 264. Similar to the embodiment shown in FIGS. 3-6 in the figure, when the stove accidentally tilts to one side, the weight valve stems 248 and 252 are tilted away from the valve seats 250 and 254 and again the reservoir 216. Allow paraffin to be fed back inside.

The liquid fuel burner may be housed in a housing (not shown) designed to hide various components of the burner.

It should be thought that both embodiments of the invention shown in FIGS. 3-9 of the drawings may include a safety device in the form of a double blocking device similar to the device 52 described above with reference to FIG. 2 in the drawings. .

Although the present invention has been described above with reference to different types of stoves, liquid fuel burners can be used to provide heat in various other applications, such as, for example, thermostats, furnaces or heaters.

Claims (20)

Burner head; A liquid fuel reservoir containing liquid fuel; And A liquid fuel burner comprising a pump for pumping liquid fuel from the reservoir to the burner head, the pump comprising: cylinder; piston; An inlet valve for sucking liquid fuel from the reservoir into the cylinder; A discharge valve for pumping liquid fuel from the cylinder to the burner head; And Including displaceable mass; The piston is the liquid fuel when the piston and the cylinder are displaced in a first direction relative to each other and the liquid fuel is sucked into the cylinder and the liquid fuel when the piston and the cylinder are displaced in an opposite second direction relative to each other. Is displaceable with respect to the cylinder, such that is pumped from the cylinder, The displaceable mass exerts sufficient force to displace the piston in the second direction with respect to the cylinder due to its weight, thereby pumping liquid fuel from the cylinder to the burner head. Liquid fuel burner. The method of claim 1, The inlet valve is a one-way valve that allows liquid fuel into the cylinder and the discharge valve is a one-way valve that allows liquid fuel from the cylinder. Liquid fuel burner. The method of claim 2, The piston is displaceable within the cylinder towards the raised state to draw liquid fuel into the cylinder and towards the lowered state to pump liquid fuel from the cylinder. Liquid fuel burner. The method of claim 3, wherein The piston is attached to the burner head via a piston tube, the piston defining an opening allowing communication of fluid between the cylinder and the piston tube. Liquid fuel burner. The method according to any one of claims 1 to 4, And a control mechanism that applies a variable resistance to displacement of the piston relative to the cylinder. Liquid fuel burner. The method of claim 5, The control mechanism includes an adjustment screw that applies a variable resistance to displacement of the piston tube. Liquid fuel burner. The method of claim 6, The piston tube is arranged to pass through the bush, and the adjustment screw is screwed into the bush to engage the piston tube. Liquid fuel burner. The method according to any one of claims 1 to 7, The cylinder is located in the liquid fuel reservoir Liquid fuel burner. The method of claim 8, The cylinder is in communication with the reservoir through the inlet valve and filter. Liquid fuel burner. The method according to any one of claims 1 to 9, The inlet valve and the outlet valve each comprise a valve closure, the valve closure being in an open position spaced from the valve seat to allow, in normal operation, the valve closure to allow one-way flow of liquid fuel through the valve. And, the valve closure is movable relative to the valve seat between a closed position that engages the valve seat to prevent liquid fuel flow through the valve. Liquid fuel burner. The method of claim 10, For each of the valves, the valve closure is arranged when the liquid fuel burner is tilted to flow liquid fuel through the valve in a direction opposite to the one-direction of liquid fuel flow in normal operation. Displaceable against Liquid fuel burner. The method of claim 1, The piston is fixed relative to the frame of the burner and the cylinder is displaceable with respect to the frame of the burner. Liquid fuel burner. The method of claim 12, The displaceable mass forms part of or attaches to the cylinder, and the piston includes a plurality of ports that allow the liquid fuel to be drawn into or pumped out of the cylinder. Liquid fuel burner. The method according to claim 12 or 13, The burner comprises a frame formed of a tubular section, the reservoir being formed by at least a portion of the tubular section Liquid fuel burner. The method of claim 14, The frame is curved along a side portion of the frame, and the burner includes a stabilizing mass that automatically restores the frame when the burner is tilted to one side. Liquid fuel burner. The method of claim 15, The stabilizing mass is a displaceable mass Liquid fuel burner. The method according to any one of claims 12 to 16, The burner further comprises a valve-shaped regulator for controlling the delivery of liquid fuel to the burner head and thus the combustion intensity at the burner head. Liquid fuel burner. The method according to any one of claims 1 to 17, The burner prevents the flow of liquid fuel to the burner head when the pressure at the burner head drops below a predetermined size and the cylinder from the cylinder head when the pressure at the burner head rises above a predetermined size. A double shut-off device for preventing back pressure displacement of the liquid flow into the furnace Liquid fuel burner. A pump for pumping liquid fuel from the reservoir to the burner head of the liquid fuel burner, cylinder; piston; An inlet valve for sucking liquid fuel from the reservoir into the cylinder; A discharge valve for pumping liquid fuel from the cylinder to the burner head; And Including displaceable mass; The piston is the liquid fuel when the piston and the cylinder are displaced in a first direction relative to each other and the liquid fuel is sucked into the cylinder and the liquid fuel when the piston and the cylinder are displaced in an opposite second direction relative to each other. Is displaceable with respect to the cylinder, such that is pumped from the cylinder, The displaceable mass exerts sufficient force to displace the piston in the second direction with respect to the cylinder due to its weight, thereby pumping liquid fuel from the cylinder to the burner head. Pump for pumping liquid fuel. The method of claim 19, The inlet and outlet valves each comprise a one-way valve Pump for pumping liquid fuel.

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