TWI715144B - Liquid fuel furnace - Google Patents

Abstract

A liquid fuel furnace includes a container, a base, a mother fire tube, an adjusting structure and a plurality of main fire structures, wherein the container is used to contain the liquid fuel, the base is arranged at the opening of the container, and the mother The fire tube and each of the main fire structures are respectively axially arranged on the base, and each of the main fire structures is arranged in the outer peripheral space of the mother fire tube in a ring shape, so that the fuel passes through the mother fire tube and each of the main fire structures to burn to form a mother Fire and main fire, the regulating structure is set in the main fire pipe, the main fire pipe opens a long air inlet, and the main fire structure forms a flow path reduction, thereby increasing the flow rate of gaseous fuel and absorbing combustion air into the main fire Fire tube, for improving combustion efficiency.

Description

Liquid fuel furnace

The invention relates to a heating stove using liquid fuel, and more specifically, to a liquid fuel stove.

An alcohol stove is a stove that uses liquid alcohol as fuel. Because the alcohol stove and liquid alcohol are easy to carry and move, the alcohol stove can be used as a stove for cooking food and drinking water outdoors or on the table.

The I628395 patent discloses a liquid fuel furnace, which includes a container, a base, a main tube, an adjusting member, and an adjusting rod, wherein the container is used to contain the liquid fuel, the top of the container forms an opening, and the base is set at The opening of the container, the main pipe is arranged on the base, the reciprocating rotating adjusting member pivotally sleeves the main pipe, the main pipe laterally penetrates through a plurality of first air outlet holes, and the adjusting member laterally penetrates through a plurality of third air outlet holes, The base is provided with several auxiliary pipes, and each of the auxiliary pipes is respectively arranged around the outer circumference of the main pipe. Each of the auxiliary pipes forms a fourth air outlet at the top edge, and each of the first air outlets points to the auxiliary pipe. Straight section.

When the vaporized fuel in the auxiliary pipes of the aforementioned liquid fuel furnace is sprayed to form a main fire, the combustion air obtained is limited, so that the liquid fuel furnace generally uses methanol or other fuels with lower carbon numbers. If ethanol, gasoline or other fuels are used Fuels with higher carbon numbers are prone to incomplete combustion due to insufficient combustion-supporting air, resulting in carbon deposits. The types of fuels that can be used by the liquid fuel furnace are limited.

The main purpose of the present invention is to provide a liquid fuel furnace, which can draw in combustion-supporting air through the composition of the main fire tube and improve the combustion efficiency.

In order to meet the expected purpose, the present invention is a liquid fuel furnace, which includes a container, a base, a mother fire tube, an adjusting structure, a plurality of main fire structures and a plurality of pressure relief tubes, wherein the container is used to contain the liquid For fuel, an opening is formed at the top of the container, the base is arranged in the opening, the mother fire tube and each main fire structure are respectively axially arranged on the base, and each main fire structure is annularly arranged on the outer periphery of the mother fire tube The bottom end of the mother fire tube extends inside the container, and the top end of the mother fire tube protrudes from the space above the base to form a heat conduction part. The mother fire tube is connected to the base A plurality of first vent holes penetrate laterally between the seat and the heat conduction part, and a plurality of first core wires made of heat-resistant material are arranged inside the mother fire tube, according to which fuel enters the mother fire tube, and then leaves the mother fire tube to burn to form The main fire flame, the adjustment structure is arranged on the main fire tube, and is used to adjust the firepower of the mother fire flame; the main fire structure includes a dip tube, a guide plate and a main fire tube, wherein the dip tube is arranged in the The base, the guide plate is connected to the top of the dip tube, the main fire tube is connected to the top of the guide plate, the top of the main fire tube forms a fire outlet, and the guide plate is located on the dip tube and the main fire tube The side adjacent to the mother fire tube receives part of the heat from the mother fire and transfers it to the dip tube, so that a large amount of liquid fuel is vaporized and sprayed out, forming a barrier between the mother fire and the third vent to prevent the mother fire from being Inhale the main fire tube, the bottom end of the dip tube extends inside the container, and a plurality of second core wires made of heat-resistant material are arranged inside the dip tube, and the fuel enters the dip tube and flows upward through the main fire tube to burn to form the main fire Flame; The top of the dip tube forms a top plate transversely, the top ends of each of the second core wires are respectively adjacent to the bottom edge of the top plate, the center of the top plate penetrates a third vent hole, thereby increasing the fuel to leave the dip The flow rate of the pilot pipe and the absorption of combustion-supporting air into the main fire pipe to improve the combustion efficiency; the main fire structure is provided with at least one spoiler element between the main fire pipe and the guide plate, according to the gaseous fuel and combustion-supporting The air forms a phenomenon of turbulence and outward expansion; each of the pressure relief pipes are respectively arranged on the base, and the inside of the container is communicated with the outside through each of the pressure relief pipes. The pressure relief pipe has a small normally open aperture, which improves Stability and overall safety of fuel vaporization.

In the present invention, the external combustion-supporting air can enter the main fire pipe, and the space form of the top plate and the third air outlet is matched to increase the flow rate of gaseous fuel flowing to the fire outlet through the third air outlet, thereby attracting a large amount of The combustion-supporting air enters the main fire pipe and mixes with gaseous fuel, which effectively improves the combustion efficiency of the fuel and creates a structure in which the flame can approach complete combustion at a low pressure.

(10)‧‧‧Container

(11)‧‧‧Open

(20)‧‧‧Base

(22)‧‧‧Pressure Relief Pipe

(23)‧‧‧Connecting pipe

(24)‧‧‧Catheter

(30)‧‧‧Female Fire Tube

(31)‧‧‧Heat conduction part

(32)‧‧‧First vent

(33)‧‧‧First core wire

(34)‧‧‧The first insulation sleeve

(40)‧‧‧Adjustment structure

(41)‧‧‧Adjusting ring

(42)‧‧‧Outer Ring

(43)‧‧‧Adjustment lever

(44)‧‧‧Adjusting hole

(45)‧‧‧Air Chamber

(46)‧‧‧Second Outlet

(50)‧‧‧Main fire structure

(51)‧‧‧Dip tube

(52)‧‧‧Guide Plate

(53)‧‧‧Main Fire Tube

(532)‧‧‧Fire Outlet

(54)‧‧‧Second core wire

(55)‧‧‧Top plate

(56)‧‧‧The third vent

(57)‧‧‧Spoiler element

(58)‧‧‧Second heat insulation sleeve

(60)‧‧‧Thermal board

(62)‧‧‧Curved

(70)‧‧‧Burner

(72)‧‧‧Second Air Chamber

(74)‧‧‧Exit the airway

The first figure is a perspective view of Embodiment 1 of the present invention.

The second figure is a three-dimensional exploded schematic diagram of Embodiment 1 of the present invention.

The third figure is a schematic cross-sectional view of Embodiment 1 of the present invention.

The fourth image is a partial enlarged view of the third image.

The fifth figure is a perspective view of the second embodiment of the present invention.

The sixth figure is a schematic cross-sectional view of the second embodiment of the present invention.

The seventh figure is a perspective view of Embodiment 3 of the present invention.

The eighth figure is a schematic partial cross-sectional view of the dip tube and the pressure relief tube in the third embodiment of the present invention.

The ninth figure is a perspective view of the fourth embodiment of the present invention.

The tenth figure is a perspective view of the fifth embodiment of the present invention.

Please refer to Figures 1 to 4, the first embodiment of the liquid fuel furnace of the present invention includes a container (10), a base (20), several pressure relief pipes (22), and a mother tube (30). ), a regulating structure (40) and several main fire structures (50), wherein the container (10) is used to hold liquid fuel, which can be alcohol, methanol, ethanol, kerosene, kerosene or gasoline or other easily vaporized An opening (11) is formed at the top of the container (10), the base (20) is set in the opening (11), each of the pressure relief pipe (22), the mother fire pipe (30) and each The main fire structure (50) is axially arranged on the base (20), and accordingly, the fuel inside the container (10) enters the mother fire tube (30) and each of the main fire structures (50), and then leaves the The mother fire tube (30) and each of the main fire structures (50) are respectively burned to form a mother fire flame and a main fire flame. The adjustment structure (40) is arranged on the mother fire tube (30), and accordingly adjusts the mother fire flame Firepower intensity; each of the main fire structures (50) is arranged in the outer peripheral space of the mother fire tube (30) in a ring shape, and is laterally opposite to the mother fire tube (30).

The bottom end of the mother fire tube (30) extends inside the container (10) and is adjacent to the bottom of the container (10). The top end of the mother fire tube (30) protrudes from the space above the base (20) and forms A heat conduction portion (31), the mother flame tube (30) laterally penetrates a plurality of first air outlet holes (32), each of the first air outlet holes (32) is respectively formed on the top edge of the base (20) and the heat conduction Between the parts (31), and each of the first air outlets (32) are radially distributed according to the axis of the mother fire tube (30). The mother fire tube (30) is provided with several first core wires ( 33), each of the first core wires (33) is a wire body made of heat-resistant material, the bottom end of each first core wire (33) extends to the bottom end of the mother tube (30), and each first core wire (33) The top end of) is respectively adjacent to the bottom edge of each of the first vent holes (32), and the inside of the mother fire tube (30) is formed by each of the first core wires (33) to form several small-width channels (not shown), According to the capillary phenomenon, the liquid fuel inside the container (10) flows along each of the channels to the top of each of the first core wires (33), and the mother flame tube (30) is connected to the container (10). The inner part is sheathed with a first heat insulation sleeve (34).

The adjusting structure (40) includes an adjusting ring (41), an outer ring (42) and an adjusting rod (43), wherein the adjusting ring (41) is pivotally sleeved on the outer periphery of the mother tube (30), and the The adjusting ring (41) laterally penetrates through a plurality of adjusting holes (44), and each adjusting hole (44) is adjacent to each of the first air outlets (32) laterally, and the outer ring (42) is looped around the adjusting hole (44). The outer circumference of the ring (41), a ring-shaped air chamber (45) is formed between the adjusting ring (41) and the outer ring (42), and the outer ring (42) laterally penetrates a plurality of second air outlet holes (46) , The air chamber (45) is respectively connected with the adjusting hole (44) and the second air outlet (46), and each of the second air outlets (46) respectively point to each of the main fire structure (50) adjacent to the mother fire One side of the tube (30), according to this, after the liquid fuel inside the mother fire tube (30) vaporizes into gaseous fuel, it is divided into the gas through each of the first outlet holes (32) and each of the adjustment holes (44). The chamber (45) then escapes to the outside of the outer ring (42) through each of the second air outlets (46), the adjusting rod (43) is connected with the adjusting ring (41), and the adjusting rod (43) is operated By turning the adjusting ring (41) to reciprocate, it is possible to adjust and change the area of the adjacent first air outlets (32) and the adjusting holes (44) that overlap and communicate with each other, and change the gaseous fuel to pass through the first The vent hole (32) and the path size of each adjustment hole (44) flowing into the gas chamber (45), thereby changing the gaseous fuel from the gas chamber (45) through each of the second vent holes (46) to the outside flow.

Operate the adjusting rod (43) to rotate the adjusting ring (42), so that each of the first air outlets (32) are respectively connected to the adjacent adjusting holes (44), so that the gaseous fuel can be passed from the mother tube (30) Flow into the air chamber (45), and then flow out from the air chamber (45) through each of the second air outlets (46). Use a lighter or igniter to approach and heat the outer ring (42) due to heat The vaporized gaseous fuel is ejected through each of the second outlet holes (46) and forms several clusters of mother fires, and each mother fire heats each of the main fire structures (50) respectively to form a high output main fire; operate the adjustment The rod (43) controls the adjusting ring (42) to reciprocately rotate, and the flow rate of gaseous fuel from the gas chamber (45) through each of the second outlet holes (46) to the outside can be changed; In one step, the gas chamber (45) forms a space for equalizing pressure and buffering. After the gaseous fuel leaves the mother tube (30), it will first converge in the gas chamber (45). Degree selection factor, between each of the first air outlets (32) or between each of the adjustment holes (44), produce a number of errors in the aperture, or each of the first air outlets (32) and the adjacent adjustment holes The overlap range between (44) is not completely consistent, so that the flow rate and dynamic pressure of the multiple gaseous fuels passing through each of the first outlet holes (32) and each of the adjusting holes (44) are not completely consistent, by The gas chamber (45) forms the effect of equalizing the pressure of multiple gaseous fuels, so that the firepower of the mother fire heated toward each of the main fire pipes (50) tends to be consistent, and avoids due to the first air outlet (32) and the adjacent Since the overlapping area of the regulating hole (44) is too small, the gaseous fuel flow rate is too fast, which in turn causes the risk of self-extinguishing of the mother fire.

The main fire structure (50) includes a dip tube (51), a guide plate (52) and a main fire tube (53), wherein the dip tube (51) is arranged on the base (20), and the guide plate (52) is connected to the top of the dip tube (51), the main fire tube (53) is connected to the top of the guide plate (52), the top of the main fire tube (53) forms a fire outlet (532), and The guide plate (52) is located on the side of the dip tube (51) and the main fire tube (53) adjacent to the mother fire tube (30), and accordingly receives part of the heat of the mother fire and conducts it to the dip tube ( 51) to vaporize a large amount of liquid fuel and spray out from a third vent hole (56), and form a barrier between the mother fire and the third vent hole (56) to prevent the mother fire from being sucked into the main fire pipe (53), The shielding fuel is smoothly sprayed to the main fire tube (53), the bottom end of the dip tube (51) extends inside the container (10), and the dip tube (51) is provided with a plurality of second core wires (54) made of heat-resistant materials. ), the dip tube (51) forms several small-width channels (not shown in the figure) through each of the second core wires (54), so that the liquid fuel inside the container (10) follows the capillary phenomenon Each of the channels flows to the top of each of the second core wires (54), and the dip tube (51) is sheathed with a second heat insulation sleeve (58) in the part of the inside of the container (10).

The top of the dip tube (51) forms a top plate (55) transversely, and each of the second core wires (54) The top ends of the top plates are respectively adjacent to the bottom edge of the top plate (55), and the center of the top plate (55) penetrates the third air outlet (56), thereby increasing the flow rate of the fuel leaving the dip tube (51) by the high-speed flow of gaseous fuel Combustion-supporting air in the external environment is attracted into the main fire pipe (53) and burned at the fire outlet (532) to form a main fire flame. Since the gaseous fuel can obtain sufficient combustion-supporting air, the combustion efficiency can be fully improved.

The main fire structure (50) is provided with at least one spoiler element (57) between the main fire pipe (53) and the guide plate (52), according to which gaseous fuel and combustion-supporting air hit each of the spoiler elements (57) ), forming the phenomenon of turbulence and outward expansion flow. The turbulence phenomenon can improve the uniformity of the mixture of gaseous fuel and combustion air, and the outward expansion flow can make the mixture of gaseous fuel and combustion air in the main fire pipe (53) The radial direction tends to be more evenly distributed, all of which are conducive to improving combustion efficiency.

Each of the spoiler elements (57) is composed of a rod-shaped body with a circular cross-section, and the spoiler element (57) can be replaced with a rod-shaped body with other shapes and cross-sections as needed. Further, the spoiler The element (57) can also be replaced with other shapes. Anything that can cause disturbance to the airflow can be used as the spoiler element (57). The spoiler element (57) is not limited to a rod-shaped body.

A heat conducting plate (60) is further provided between the mother fire pipe (30) and each of the main fire pipes (53) if necessary, and the central part of the heat conducting plate (60) is sleeved on the heat conducting part (31), and The heat-conducting plate (60) forms several arc-shaped parts (62) on the outer edge, and each arc-shaped part (62) respectively jackets the main fire tube (53). According to the principle of high temperature to low temperature transfer, the heat-conducting plate (60) will receive part of the heat from the main fire and the main fire and conduct to each of the main fire pipe (53) and the heat conducting part (31), so that the heat conducting part (31) continues to generate heat and is transferred to the main fire pipe (30) ), in this way, when in a low fire state (the mother fire is adjusted to be extinguished), the heat energy of the heat conducting part (31) can be continuously transferred to the mother fire tube (30) and the outer ring (42), so that the The temperature of the mother fire tube (30) and the outer ring (42) should not be too low (above the vaporization temperature). If you want to adjust the firepower output again (ignite the mother fire), you only need to turn the adjustment structure (40) ) To connect the adjusting hole (44) with the first air outlet (32) The gaseous fuel can immediately enter the gas chamber (45) and be sprayed out, and the mother fire can be ignited again when encountering the fire source of the main fire without using an igniter.

The first heat insulation sleeve (34) can reduce the heat energy transferred from the mother flame tube (30) to the liquid fuel in the container (10), and each of the second heat insulation sleeves (56) can reduce each of the dip tubes ( 51) Heat energy transferred to the liquid fuel in the container (10), so as to avoid excessive pressure inside the container (10) due to the boiling point of the liquid fuel, and increase the stability and safety of the firepower output.

One end of each of the pressure relief pipes (22) communicates with the inside of the container (10), and the other end of each pressure relief pipe (22) communicates with the space above the base (20). Accordingly, the liquid inside the container (10) The temperature of the fuel rises due to the thermal energy conduction of the mother tube (30) and each dip tube (51), and when the fuel is accelerated and volatilized into a gaseous fuel in the space above the liquid fuel surface, each pressure relief tube (22) provides the container (10) The internal pressure release channel in the space above the liquid fuel level prevents the air pressure in the space from being too high, thereby improving the safety of use.

As mentioned above, the main fire structure (50) of the present invention provides a passage for external combustion-supporting air to enter the main fire pipe (53), and matches the space form of the top plate (55) and the third air outlet (56) to improve the gaseous state The flow rate of the fuel flowing to the main fire tube (53) through the third air outlet (56) can attract a large amount of combustion-supporting air into the main fire tube (53) to mix with the gaseous fuel, which effectively improves the fuel combustion efficiency. In addition to methanol or other fuels with a lower carbon number, if ethanol, gasoline or other fuels with a higher carbon number are used, excellent combustion efficiency can be obtained, and carbon deposits are not easy to occur. In short, even if there are still some Carbon deposits or soup contaminated with carbides are attached to the main fire tube (53), which can also provide convenience for cleaning.

Further, the main fire tube (53) is formed to be inclined toward the outside direction away from the mother fire tube (30).

The second embodiment is based on the variation of the first embodiment. The second embodiment has the same structure as the first embodiment and will not be repeated. Please refer to the fifth and sixth figures. The third embodiment is different from the first embodiment. Mainly, the second embodiment further includes a ring-shaped furnace head (70), the furnace head (70) is arranged at the top of the main fire tubes (53), and the furnace head (70) forms a ring-shaped second An air chamber (72), the second air chamber (72) is connected to each of the main fire tubes (50), the top of the burner (70) forms a ring-shaped air outlet (74) at the outer edge, the air outlet (74) is connected to the second air chamber (72), according to which the mixture of gaseous fuel and combustion air enters the second air chamber (72) from each of the main fire pipes (53), and then the second air The chamber (72) flows out through the air outlet (74) and can be ignited to form a ring-shaped main fire flame.

Furthermore, when the mixed gas enters the second gas chamber (72), the peripheral wall and the top wall of the second gas chamber (72) can further mix the mixed gas, thereby further improving the combustion efficiency.

The third embodiment is based on the variation of the first embodiment. Please refer to the seventh and eighth diagrams. The third embodiment is different from the first embodiment in that the top of each pressure relief pipe (22) is connected with a continuous Through pipes (23), each of the communicating pipes (23) is respectively connected to each of the third outlet holes (56), and the gaseous fuel flowing out through each of the pressure relief pipes (22) enters each of the communicating pipes (23). The third air outlet (56) is then ejected at a high speed to form a main fire, thereby recovering the gaseous fuel escaping outward through the pressure relief pipes (22) to improve the utilization rate of fuel.

The fourth embodiment is based on the variation of the first embodiment. Please refer to the ninth figure. The fourth embodiment is different from the first embodiment in that it further includes several catheters (24), and each catheter (24) is provided with In the top space of each pressure relief pipe (not shown in the figure), each of the pipes (24) respectively guides the gaseous fuel flowing out through each pressure relief pipe to flow upwards, so that the gaseous fuel flows along each of the pipes (24) Flow upwards and form another form of auxiliary heating flame at the top of each pipe (24) to avoid The gaseous fuel forms a flame at the top of the pressure relief pipe, and other components affecting the periphery of the pressure relief pipe are damaged by high heat.

The tenth figure illustrates the fifth embodiment based on the first embodiment.

In summary, through the original structure and overall spatial shape of the present invention, it can fully meet the expected purpose and has good effects. The present invention has not been seen in publications or used publicly before the application. It has the legal requirements of an invention patent and is proposed according to law. Apply and implore the granting of the patent as soon as possible.

(10)‧‧‧Container

(20)‧‧‧Base

(22)‧‧‧Pressure Relief Pipe

(30)‧‧‧Female Fire Tube

(31)‧‧‧Heat conduction part

(40)‧‧‧Adjustment structure

(42)‧‧‧Outer Ring

(43)‧‧‧Adjustment lever

(50)‧‧‧Main fire structure

(51)‧‧‧Dip tube

(52)‧‧‧Guide Plate

(53)‧‧‧Main Fire Tube

(532)‧‧‧Fire Outlet

Claims (7)

A liquid fuel furnace includes a container, a base, a mother fire tube, an adjusting structure, a plurality of main fire structures and a plurality of pressure relief tubes, wherein the container is used to contain liquid fuel, and an opening is formed at the top of the container , The base is set in the opening, the mother fire tube and each of the main fire structures are respectively axially arranged on the base, and each of the main fire structures is arranged in an annular shape in the outer peripheral space of the mother fire tube, and is connected to the mother fire tube Opposite sideways, the bottom end of the mother fire tube extends inside the container, the top end of the mother fire tube protrudes from the space above the base and forms a heat conduction part, and the mother fire tube is located between the base and the heat conduction part. There are several first core wires made of heat-resistant material inside the mother fire tube, and the fuel enters the mother fire tube and then leaves the mother fire tube to burn to form a mother fire flame. The mother fire tube is used to adjust the fire power of the mother fire flame; each of the main fire structures includes a dip tube, a guide plate and a main fire tube, wherein the dip tube is arranged on the base, the guide plate and The top of the dip tube is connected, the main fire tube is connected with the top of the guide plate, the top of the main fire tube forms a fire outlet, and the guide plate is located on the dip tube and the main fire tube adjacent to the main fire tube One side, according to this, receives part of the heat from the mother fire and conducts it to the dip tube, so that a large amount of liquid fuel is vaporized and sprayed out, and forms a barrier between the mother fire and a third vent hole to prevent the mother fire from being sucked into the main fire tube. The bottom end of the dip tube extends inside the container, and the inside of the dip tube is provided with a plurality of second core wires made of heat-resistant material, and the fuel enters the dip tube and flows upward through the main fire tube to burn to form a main fire flame; the top of the dip tube A top plate is formed transversely, the top of each second core wire is respectively adjacent to the bottom edge of the top plate, and the center of the top plate penetrates the third air outlet, thereby increasing the flow rate of fuel leaving the dip tube, and attracting combustion air due to the principle of fluid power Enter the main fire pipe to increase combustion efficiency; The main fire structure is provided with at least one spoiler element between the main fire pipe and the guide plate, according to the phenomenon that the gaseous fuel and the combustion-supporting air form a turbulent flow and expand outward; each of the pressure relief pipes is axially arranged at The base and the inside of the container communicate with the outside through each of the pressure relief pipes. The pressure relief pipe has a small normally open aperture, thereby improving the stability and safety of fuel vaporization. The liquid fuel furnace described in item 1 of the scope of patent application, wherein the adjustment structure includes an adjustment ring, an outer ring, and an adjustment rod, wherein the adjustment ring is pivotally sleeved on the outer periphery of the mother tube, and the adjustment ring A plurality of adjusting holes penetrate laterally, and each of the adjusting holes is adjacent to each of the first air outlets, the adjusting rod is connected with the adjusting ring, the outer ring is sleeved on the outer circumference of the adjusting ring, and the adjusting ring is connected to the A ring-shaped air chamber is formed between the outer ring, the outer ring laterally penetrates through a plurality of second air outlets, the air chambers are respectively connected to the adjusting hole and the second air outlet, and each second air outlet points to Each dip tube is adjacent to one side of the mother fire tube, and the air chamber makes the fire power of each mother fire tend to be consistent, and prevents the mother fire from extinguishing due to adjustment to a high-speed flow. For the liquid fuel furnace described in item 1 of the scope of patent application, wherein a heat conducting plate is arranged between the mother fire tube and each of the main fire tubes, the central part of the heat conducting plate is sleeved on the heat conducting part, and the heat conducting plate The main fire pipes are respectively jacketed on the outer edges, and the heat energy received from the main fire and the mother fire is conducted to the heat conduction part according to this, and is continuously transmitted to the low temperature parts to maintain the working temperature. The liquid fuel furnace described in item 1 of the scope of patent application further includes a ring-shaped furnace head, wherein the furnace head is arranged at the top of each of the main fire tubes, and an annular second gas chamber is formed inside the furnace head The second air chamber communicates with each of the main fire pipes, the top of the burner forms an annular air outlet at the outer edge, and the air outlet communicates with the second air chamber, so that the gaseous fuel and the combustion air are mixed The gas enters the second gas chamber from each of the main fire pipes, and then flows out from the second gas chamber through the air outlet, and is ignited to form a ring-shaped main fire flame. For example, the liquid fuel furnace described in item 1 of the scope of patent application, wherein the part of the mother tube inside the container is sheathed with a first heat insulation sleeve, and the part of the dip tube inside the container is sheathed with a first insulation sheath. 2. Insulation sleeve. For example, the liquid fuel furnace described in item 1 of the scope of patent application further includes a plurality of ducts, and each of the ducts is respectively arranged in the top space of each of the pressure relief pipes, and each of the pipes is guided through each of the pressure relief pipes. The gaseous fuel flows upward. For the liquid fuel furnace described in item 1 of the scope of patent application, a connecting pipe is connected to the top of each pressure relief pipe, and each of the communication pipes is respectively connected with each of the dip tubes and flows out through each of the pressure relief pipes. The remaining gaseous fuel enters each of the third vent holes and is discharged at a high speed to form the main fire.

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