A fluid fuel burner

Abstract

The utility model provides a fluid fuel combustion furnace relates to fluid fuel combustion technical field, solves the fluid fuel furnace of existing, big volume, is inconvenient to use and removes outdoors, is inconvenient to disassemble maintenance, fuel combustion is not sufficient, heat efficiency is high and low, and the problem of poor safety. The utility model discloses a furnace head subassembly is installed on the upper end of furnace support, is connected in the nozzle subassembly of furnace head subassembly lower extreme, is provided with the secondary air inlet on furnace head subassembly, the circuit bridge of a circle square pipe is provided with around the supporting plate, the lower part of furnace support is provided with the commodity shelf, is provided with the air blower of providing secondary air for furnace head subassembly, the first high pressure fan of providing primary high pressure air for nozzle subassembly on the commodity shelf or the circuit bridge of square pipe is provided with the material feeding device of feeding for nozzle subassembly, is used for the pulse igniter of ignition. The utility model has the advantages of: convenient use and remove, convenient disassembly maintenance, high heat efficiency, more safe.

Description

Technical Field

[0001] This utility model relates to the field of fluid fuel combustion technology, and specifically to a fluid fuel combustion furnace. Background Technology

[0002] During combustion, fuel releases a large amount of chemical heat, which is used to heat food and so on. Fluid fuel stoves refer to non-fixed cooking stoves that use bottled fluid fuel as energy and directly heat it with fire. Existing fluid fuel stoves are large in size, inconvenient for outdoor use and movement, difficult to disassemble and maintain, have incomplete fuel combustion, low thermal efficiency, and poor safety. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing fluid fuel furnaces, such as large size, inconvenience for outdoor use and relocation, inconvenience for disassembly and maintenance, incomplete fuel combustion, low thermal efficiency, and poor safety.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A fluid fuel combustion furnace includes a furnace support frame, characterized in that it further includes a burner head assembly mounted on the upper end of the furnace support frame and a nozzle assembly connected to the lower end of the burner head assembly. The burner head assembly is provided with a secondary air inlet, and the nozzle assembly is provided with a heating device, a primary high-pressure air inlet, a temperature sensor, a feed inlet, and a return inlet. A support plate is provided in the middle of the furnace support frame, and the lower end of the nozzle assembly is connected to the middle of the support plate. A control panel is vertically mounted on the front of the support plate, and a ring of square tubing circuitry is provided around the perimeter of the support plate. The furnace support has a shelf at its lower part, on which a blower for providing secondary air to the furnace head assembly and a first high-pressure blower for providing primary high-pressure air to the nozzle assembly are mounted. The shelf or the circuit bridge of the square tube is equipped with a feeding device for feeding the nozzle assembly and a pulse igniter for ignition. The outlet of the first high-pressure blower is connected to the primary high-pressure air inlet through a pipe. The outlet of the blower is connected to the secondary air inlet on the furnace head assembly through a pipe. The outlet of the feeding device is connected to the inlet through a pipe.

[0006] A further improvement is that the outer wall of the burner assembly is hung on the furnace support by a ring of lugs, the pulse ignition needle of the pulse igniter extends into the burner assembly, the inner wall of the burner assembly 2 has several air outlet holes for secondary air to participate in the combustion of the flame, and the upper end of the nozzle assembly is located in the throat of the burner assembly.

[0007] A further improvement is that the support plate is welded to the middle of the furnace support through a square tube, and a through hole is opened in the middle of the support plate. The through hole is an incomplete circular hole with a straight edge.

[0008] A further improvement is made to the nozzle assembly, which includes a first tube, a second tube, a third tube, a nozzle assembly, and an end cap. The primary high-pressure air inlet and return port are located on the side wall of the first tube. The second tube is threadedly connected to the inside of one end of the first tube, and the inlet is located on the side wall of the second tube. A sensor mounting port is also provided on the side wall of the second tube, and the temperature sensor is mounted on the sensor mounting port. The third tube is threadedly connected to the end of the second tube closest to the first tube, and the third tube is located inside the first tube. The heating device is installed in the end of the second tube furthest from the first tube. The heating device includes an electric heating rod and a mounting head; the electric heating rod is fixed to the mounting head, and the mounting head is threadedly connected to the end of the second tube furthest from the first tube.

[0009] A further improvement is that the outer peripheral wall of the second tube body located below the feed inlet is provided with an external thread with a straight edge; the second tube body passes through the through hole, and the straight edge of the external thread of the second tube body is engaged with the straight edge of the through hole of the support plate and locked by the cooperation of the locking nut.

[0010] A further improvement is that, when the above installation conditions are limited, the first tube body is provided with a straight edge, and the straight edge of the first tube body is engaged with the straight edge of the through hole of the support plate.

[0011] A further improvement is made: when the above installation conditions are limited, the tapered section before the throat has an external thread, and the matching internally threaded annular ring has three legs at its lower end. There are gaps between the legs, which allow air to enter. The three legs are connected to a support plate with a through hole with a straight edge.

[0012] A further improvement is made to the nozzle assembly, which includes a nozzle outer sleeve and a nozzle inner core. The nozzle outer sleeve is threadedly connected to the end of the third tube away from the second tube. A nozzle cavity is formed inside the nozzle outer sleeve, and the nozzle inner core is located within the nozzle cavity. A nozzle hole is formed at the end of the nozzle outer sleeve away from the third tube. Several air grooves extending from the edge to the center are also formed on the end face of the nozzle outer sleeve away from the third tube. The head end of the nozzle inner core is fitted into the nozzle hole. A nozzle hole penetrating both ends is formed in the middle of the nozzle inner core. When the fluid is gas, the nozzle hole is a cylindrical base hole with a V-shaped hole. The end cap is threadedly connected to the end of the first tube away from the second tube, and an end cap hole corresponding to the nozzle hole is formed in the middle of the end cap. The number of air ducts is six, and each air duct is tangent to the nozzle hole; the nozzle inner core includes a cylindrical section, and a tapered section is fixedly connected to one end of the cylindrical section near the end cap; the circumferential side of the cylindrical section is provided with external threads, and the cylindrical section is threadedly connected to the third pipe body; the first pipe body, the second pipe body, the third pipe body, and the end cap can be rotatably connected by pipe wrenches; the end face of the end cap away from the first pipe body is a plane or has a spherical groove; a threaded mounting slot is provided on the end face of the end cap near the first pipe body, and the end cap is installed on the end of the first pipe body through the threaded mounting slot; the end face of the nozzle outer sleeve near the end cap is pressed against the inner end face of the threaded mounting slot.

[0013] A further improvement is that the feeding device is an oil pump or a second high-pressure blower.

[0014] A further improvement is made to the control panel, which includes a leakage current protector, a temperature controller, and several switches and buttons. The leakage current protector is electrically connected to the pulse igniter, heating device, blower, first high-pressure blower, and oil pump / second high-pressure blower via the switches. The leakage current protector is also electrically connected to the temperature controller, which is electrically connected to a temperature sensor. The temperature controller has a display screen that shows the temperature value. The control panel is slot-shaped, with a waterproof top surface. The display screen, switches, and buttons of the temperature controller are mounted on the vertical surface of the control panel, and are installed in a vertical plate or bottom plate depending on the installation conditions.

[0015] A further improvement is that, with the advancement of technology, it is possible to gradually integrate all switches and buttons into a single controller, which can then be installed within a slotted control panel.

[0016] Further improvements include: when there are multiple burner and nozzle assemblies, using a single blower, an oil pump, and a high-pressure blower, with their associated common piping connected by a union-connected female pipe, or separating the shelving unit into a tabletop structure.

[0017] A further improvement is that if the outlet pressure of the blower is selected to be higher and the resistance in the pipeline is selected to be lower, then the high-pressure blower can be eliminated, and the primary air is also provided by the blower. That is, a three-way valve is added to the outlet of the blower, one of which is the air source, one of which is connected to the primary air, and another of which is connected to the secondary air.

[0018] A further improvement is that the electrical wires in the combustion furnace are designed to pass through the inside of a square steel pipe, and several holes are drilled on the bottom surface of the square steel pipe. The holes are covered with plastic sleeves to prevent the wires from being damaged.

[0019] Compared with existing technologies, the above technical solution has the following advantages:

[0020] The overall structure is compact, making it convenient for outdoor use and movement. It is easy to disassemble and maintain, and the secondary air intake ensures complete fuel combustion and high thermal efficiency. The support plate insulates the upper part from heat and protects the components below, making it safer. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0024] Figure 3 This is a schematic diagram of the nozzle assembly in this utility model;

[0025] Figure 4 This is an exploded structural diagram of the nozzle assembly in this utility model;

[0026] Figure 5 This is a top view of the end cap of this utility model;

[0027] Figure 6 This is a schematic diagram of the nozzle outer sleeve in this utility model;

[0028] Figure 7 A schematic diagram of the structure of a nozzle core with another shape;

[0029] Figure 8 This is a schematic block diagram of the circuit principle structure of this utility model.

[0030] Explanation of reference numerals in the attached drawings: 1. Furnace support; 2. Furnace head assembly; 3. Nozzle assembly; 4. Support plate; 5. Shelf; 6. Blower; 7. Oil pump; 8. Control panel; 9. Locking nut; 10. First high-pressure blower; 21. Hanging lug; 22. Secondary air inlet; 23. Pulse igniter; 31. First pipe body; 32. Second pipe body; 33. Third pipe body; 34. Nozzle assembly; 35. End cap; 36. Heating device; 37. Temperature sensor; 38. Primary high-pressure air inlet. 11. Return port 312. Feed port 321. Temperature sensor mounting port 322. Nozzle outer sleeve 341. Nozzle inner core 342. Nozzle cavity 343. Nozzle hole 344. Air groove 345. Spray hole 346. Wrench face 347. Spherical groove 351. End cap hole 352. Outer octagonal part 353. Threaded mounting slot hole 354. Electric heating rod 361. Mounting head 362. Cylindrical section 3421. Conical section 3422. Detailed Implementation

[0031] See Example 1 Figure 1 , Figures 3-8 As shown, the technical solution adopted in this specific embodiment is: a fluid fuel combustion furnace, including a furnace support 1, characterized in that: it further includes a burner head assembly 2 installed on the upper end of the furnace support 1 and a nozzle assembly 3 connected to the lower end of the burner head assembly 2. The burner head assembly 2 is provided with a secondary air inlet 22, and the nozzle assembly 3 is provided with a heating device 36, a primary high-pressure air inlet 311, a temperature sensor 37, a feed inlet 321, and a return inlet 312. A support plate 4 is provided in the middle of the furnace support 1, and the lower end of the nozzle assembly 3 is connected to the middle of the support plate 4. A control panel 8 is vertically installed on the front of the support plate 4, and the periphery of the support plate 4... A circuit bridge with a ring of square tubes is provided. A shelf 5 is provided at the lower part of the furnace support 1. A blower 6 that provides secondary air to the furnace head assembly 2 and a first high-pressure blower 10 that provides primary high-pressure air to the nozzle assembly 3 are provided on the shelf 5 or the circuit bridge with square tubes. A feeding device 7 that supplies material to the nozzle assembly 3 and a pulse igniter 23 for ignition are provided on the shelf 5 or the circuit bridge with square tubes. The air outlet of the first high-pressure blower 10 is connected to the primary high-pressure air inlet 311 through a pipe. The outlet of the blower 6 is connected to the secondary air inlet 22 on the furnace head assembly 2 through a pipe. The discharge port of the feeding device 7 is connected to the inlet 321 through a pipe.

[0032] The shelf 5 is surrounded by a square tube for running electrical wires. The power cord is introduced from one foot of the furnace support 1. There is a through hole at the furnace support where the square tube intersects with the power cord. Several holes are drilled on the bottom surface of the square tube for running electrical wires, and plastic rings are fitted around the edges of the holes to protect the power cords, thus facilitating the insertion and removal of the power cord ends.

[0033] The outer wall of the burner assembly 2 is hung on the furnace support 1 by a ring of lugs 21. The inner wall of the burner assembly 2 has several air outlet holes for secondary air to participate in the combustion of the flame. The pulse ignition needle of the pulse igniter 23 extends into the burner assembly 2. The specific structure of the burner assembly 2 adopts the burner structure in a liquid combustion furnace with reduced heat loss disclosed in CN221858634U. The upper end of the nozzle assembly 3 is located in the throat of the burner assembly 2.

[0034] The support plate 4 is welded to the middle of the furnace support 1 through a square tube. The support plate 4 has a through hole in the middle, which is an incomplete circular hole with a straight edge.

[0035] The nozzle assembly 3 includes a first tube 31, a second tube 32, a third tube 33, a nozzle assembly 34, and an end cap 35. The primary high-pressure air inlet 311 and the return port 312 are located on the side wall of the first tube 31. The second tube 32 is threaded into one end of the first tube 31 (specifically, one end of the second tube 32 may have an external thread, and the corresponding end of the first tube 31 may have a matching internal thread). The feed inlet 321 is located on the side wall of the second tube 32. A sensor mounting port 322 is also provided on the side wall of the second tube 32, and the temperature sensor 37 is mounted on the sensor. The sensor is mounted on the port 322; the third tube 33 is threadedly connected to the end of the second tube 32 near the first tube 31 (specifically, the third tube 33 may have an external thread at one end, and the corresponding end of the second tube may have a matching internal thread), and the third tube 33 is located inside the first tube 31; the heating device 36 is installed in the end of the second tube 32 away from the first tube 31; the heating device 36 includes an electric heating rod 361 and a mounting head 362, the electric heating rod 361 is fixed on the mounting head 362, and the mounting head 362 is threadedly connected to the end of the second tube 32 away from the first tube 31.

[0036] The second tube 32 has an external thread with a straight edge on its outer peripheral wall below the feed inlet 321; the second tube 32 passes through the through hole, and the straight edge of the external thread of the second tube 32 is engaged with the straight edge of the through hole of the support plate 4 and locked by the locking nut 9.

[0037] The first pipe body 31 and the third pipe body 33 are both straight pipes or right-angle bends, and the second pipe body 32 is a straight pipe.

[0038] The nozzle assembly 34 includes a nozzle outer sleeve 341 and a nozzle inner core 342. The nozzle outer sleeve 341 is externally threaded to the end of the third tube 33 away from the second tube 32. A nozzle cavity 343 is formed inside the nozzle outer sleeve 341, and the nozzle inner core 342 is located within the nozzle cavity 343. A nozzle hole 344 is formed at the end of the nozzle outer sleeve 341 away from the third tube 33. Several air grooves 345 extending from the edge to the center are also formed on the end face of the nozzle outer sleeve 341 away from the third tube 33. The head end of the nozzle core 342 is fitted into the nozzle hole 344. The nozzle core 342 has a nozzle hole 346 that passes through both ends. When the fluid is gas, the nozzle hole 346 is a cylindrical hole with a V-shaped hole. The end cap 35 is threaded to the end of the first tube 31 away from the second tube 32 (specifically, the end cap 35 can be provided with an internal thread, and the corresponding end of the first tube 31 can be provided with a matching external thread with a straight edge). The end cap 35 has an end cap hole 352 in the middle that corresponds to the nozzle hole 346.

[0039] The return port 312 connects to the recovery pipe to recover unburned fluid fuel ejected from the nozzle 346, saving energy. The primary high-pressure air inlet 311 and the return port 312 can be arranged axially on the side of the first pipe body 31, or spaced apart on the same radial plane, such as at 90-degree or 180-degree intervals. The feed inlet 321 and the temperature sensor mounting port 322 can be arranged axially on the side of the second pipe body 32, or spaced apart on the same radial plane, such as at 90-degree or 180-degree intervals.

[0040] The nozzle core 345 comprises six air ducts 345, each tangent to the nozzle orifice 346. The nozzle core 34 includes a cylindrical section 3421, with a tapered section 3422 fixedly connected to one end of the cylindrical section 3421 near the end cap 35. The cylindrical section 3421 has external threads on its circumferential side and is threadedly connected to the third tube 33. The nozzle core 34 also has two symmetrical wrench faces 347 on its side for easy wrench insertion. These wrench faces 347 can be either hexagonal or octagonal, as long as they facilitate wrench insertion and rotation.

[0041] The first tube body 31, the second tube body 32, the third tube body 33, and the end cap 35 can be rotatably connected by pipe wrenches. Alternatively, the outer surface of the first tube body 31 or the second tube body 32 is provided with an outer quadrangular portion, an outer hexagonal portion, or an outer octagonal portion for easy rotation; the outer surface of the nozzle sleeve is provided with an outer quadrangular portion, an outer hexagonal portion, or an outer octagonal portion for easy rotation; and the outer surface of the end cap is provided with an outer hexagonal portion or an outer octagonal portion 353 for easy rotation. The outer four corners, outer hexagons, and outer octagons 353 can also be replaced with symmetrical wrench faces 347, as long as it is convenient to insert and rotate the wrench; the end face of the end cap 35 away from the first tube body 31 is flat or has a spherical groove 351; the end face of the end cap 35 near the first tube body 31 has a threaded mounting slot 354, the end cap 35 is installed on the end of the first tube body 31 through the threaded mounting slot 354, and the nozzle sleeve 341 is pressed against the inner end face of the threaded mounting slot 354 near the end cap 35.

[0042] The feeding device 7 is either an oil pump or a second high-pressure blower, depending on the type of fluid fuel. An oil pump is used when the fluid fuel is liquid, and a second high-pressure blower is used when the fluid fuel is gas.

[0043] The control panel 8 includes a leakage current protector, a temperature controller, and several switches and buttons. The leakage current protector is electrically connected to the pulse igniter 23, the heating device 36, the blower 6, the first high-pressure blower 10, and the oil pump 7 / second high-pressure blower via the switches. The leakage current protector is also electrically connected to the temperature controller 37, which is electrically connected to a temperature sensor. The temperature controller 37 has a display screen that shows the temperature value. The control panel 8 is 8-slot shaped, with a waterproof top surface. The display screen, switches, and buttons of the temperature controller are installed on the vertical surface of the control panel 8, and are installed in a vertical plate or bottom plate depending on the installation conditions.

[0044] When there are multiple burner assemblies 2 and nozzle assemblies 3, a blower, an oil pump, and a high-pressure blower are used, and their related common pipes are connected by a female pipe with a union, or the shelf is separated into a tabletop structure.

[0045] The electrical wires in the combustion furnace are designed to pass through the inside of a square steel pipe, and the bottom surface of the square steel pipe is drilled with several holes. The holes are covered with plastic sleeves to prevent the wires from being damaged.

[0046] See Example 2 Figure 2 , Figures 3-8As shown, the difference between this specific embodiment and Embodiment 1 lies in the installation method of the nozzle assembly 3. The characteristic is that the first tube 31 is provided with a straight edge, and the straight edge of the first tube 31 is snapped onto the straight edge of the through hole of the support plate 4. At this time, the external thread of the second tube 32 is not needed.

[0047] The working principle of this utility model is as follows: During use, the oil pump or the second high-pressure blower is selected for feeding according to the type of fluid fuel. When the fluid is gaseous, the second high-pressure blower is selected for feeding. The fluid fuel enters the second tube from the feed inlet. The heating device preheats the incoming fluid fuel (heating can be selected depending on the situation for gaseous fuel). The temperature sensor monitors whether the fluid fuel has been heated to the set temperature. The heated fluid fuel then enters the third tube, passes through the nozzle core, and finally exits from the nozzle hole. Air is connected to the primary high-pressure air inlet through the first high-pressure blower 10. After entering from the primary high-pressure air inlet, the air flows from the air channel to the middle of the nozzle, i.e., the root of the flame, providing primary air (i.e., oxygen supply) for combustion. Secondary air enters the cavity of the furnace head assembly 2 from the outlet of the secondary blower 6, and is then sent out through the vent hole to provide secondary air (i.e., oxygen supply). Ignition is achieved through a pulse igniter. The return port is connected to a recovery pipe to recover unburned fluid fuel ejected from the nozzle, saving energy. The support plate isolates heat from above, protecting lower components and preventing damage to the control panel, first high-pressure blower, and oil pump on the lower shelf. When the nozzle becomes clogged, simply unscrew the end cap and then the nozzle assembly for cleaning – time-saving, labor-saving, efficient, low-intensity, and easy to maintain. The compact overall structure facilitates outdoor use and relocation, and easy disassembly and maintenance. Secondary air intake ensures complete fuel combustion and high thermal efficiency.

[0048] When work is required, first start the oil pump and open the fuel switch. When you see fuel being sprayed from the nozzle, close the fuel switch, start the heating device to heat the fuel, and when you see the temperature on the temperature display reach the fuel ignition temperature, press the pulse igniter button to make the pulse ignition needle release an electric spark. Then open the fuel switch again. After the heated fuel is atomized, it will be ignited and burn under the action of the electric spark. Adjust the switch as needed. At this time, turn on the primary high-pressure blower, turn on the switch, and adjust the air volume of the primary blower. Similarly, turn on the secondary blower, turn on the switch, and adjust the air volume of the secondary blower. When the work is completed, first turn off the heating device switch, then turn off the fuel switch, then turn off the primary and secondary blower switches, and finally turn off the high-pressure blower and the blower.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A fluid fuel combustion furnace, comprising a furnace support, characterized in that: It also includes a burner head assembly installed on the upper end of the furnace support and a nozzle assembly connected to the lower end of the burner head assembly. The burner head assembly is provided with a secondary air inlet. The nozzle assembly is provided with a heating device, a primary high-pressure air inlet, a temperature sensor, a feed inlet, and a return inlet. A support plate is provided in the middle of the furnace support. The lower end of the nozzle assembly is connected to the middle of the support plate. A control panel is vertically installed on the front of the support plate. A ring of square tube circuit bridges is provided around the support plate. A shelf is provided at the lower part of the furnace support. A blower that provides secondary air to the burner head assembly and a first high-pressure blower that provides primary high-pressure air to the nozzle assembly are provided on the shelf or the square tube circuit bridge. A feeding device for feeding the nozzle assembly and a pulse igniter for ignition are provided on the shelf or the square tube circuit bridge. The air outlet of the first high-pressure blower is connected to the primary high-pressure air inlet through a pipe. The outlet of the blower is connected to the secondary air inlet on the burner head assembly through a pipe. The discharge port of the feeding device is connected to the feed inlet through a pipe.

2. The fluid fuel combustion furnace according to claim 1, characterized in that: The outer wall of the burner head assembly is hung on the furnace support by a ring of lugs. The inner wall of the burner head assembly has several air outlet holes for secondary air to participate in the combustion of the flame. The pulse ignition needle of the pulse igniter extends into the burner head assembly. The upper end of the nozzle assembly is located in the throat of the burner head assembly.

3. A fluid fuel combustion furnace according to claim 1, characterized in that: The support plate is welded to the middle of the furnace support through a square tube. A through hole is opened in the middle of the support plate. The through hole is an incomplete circular hole with a straight edge.

4. A fluid fuel combustion furnace according to claim 3, characterized in that: The nozzle assembly includes a first tube, a second tube, a third tube, a nozzle assembly, and an end cap. The primary high-pressure air inlet and return port are located on the side wall of the first tube. The second tube is threaded into one end of the first tube, and the inlet is located on the side wall of the second tube. A sensor mounting port is also provided on the side wall of the second tube, and the temperature sensor is mounted on the sensor mounting port. The third tube is threaded into the end of the second tube closest to the first tube, and the third tube is located inside the first tube. The heating device is installed in the end of the second tube away from the first tube. The heating device includes an electric heating rod and a mounting head. The electric heating rod is fixed to the mounting head, and the mounting head is threaded to the end of the second tube away from the first tube. The nozzle assembly includes a nozzle outer sleeve and a nozzle inner core. The nozzle outer sleeve is externally threaded to the end of the third tube away from the second tube. A nozzle cavity is opened inside the nozzle outer sleeve, and the nozzle inner core is located inside the nozzle cavity. A nozzle hole is opened at the end of the nozzle outer sleeve away from the third tube. The pipe body has several air grooves extending from the edge to the center on its end face. The head end of the nozzle core is fitted into the nozzle hole. The nozzle core has a through-hole in the middle, which is a cylindrical hole with a V-shaped hole when the fluid is gas. The end cap is threaded onto the end of the first pipe body away from the second pipe body. The end cap has an end cap hole in the middle corresponding to the nozzle hole. There are six air grooves, all of which are tangent to the nozzle hole. The nozzle core includes a cylindrical section, and a cone is fixedly connected to the end of the cylindrical section near the end cap. The cylindrical segment has an external thread on its circumferential side, and the cylindrical segment is threadedly connected to the third pipe body; the first pipe body, the second pipe body, the third pipe body, and the end cap can be rotatably connected by pipe wrenches; the end face of the end cap away from the first pipe body is flat or has a spherical groove; the end face of the end cap near the first pipe body has a threaded mounting slot, and the end cap is installed on the end of the first pipe body through the threaded mounting slot, and the end face of the nozzle sleeve near the end cap is pressed against the inner end face of the threaded mounting slot.

5. A fluid fuel combustion furnace according to claim 4, characterized in that: The second tube body has an external thread with a straight edge on its outer peripheral wall located below the feed inlet; the second tube body passes through the through hole, and the straight edge of the external thread of the second tube body is engaged with the straight edge of the through hole of the support plate and locked by the locking nut.

6. A fluid fuel combustion furnace according to claim 4, characterized in that: The first tube has a straight edge, which is engaged with the straight edge of the through hole in the support plate.

7. A fluid fuel combustion furnace according to claim 4, characterized in that: The feeding device is an oil pump or a second high-pressure blower.

8. A fluid fuel combustion furnace according to claim 7, characterized in that: The control panel includes a leakage current protector, a temperature controller, and several switches and buttons. The leakage current protector is electrically connected to a pulse igniter, a heating device, a blower, a first high-pressure blower, and an oil pump / second high-pressure blower via switches. The leakage current protector is electrically connected to the temperature controller, which is electrically connected to a temperature sensor. The temperature controller has a display screen that shows the temperature value. The control panel is slotted, with a waterproof top surface. The display screen, switches, and buttons of the temperature controller are mounted on the vertical surface of the control panel, and are installed in a vertical plate or bottom panel depending on the installation conditions.

9. A fluid fuel combustion furnace according to claim 8, characterized in that: When there are multiple burner and nozzle assemblies, use one blower, one oil pump, and one high-pressure blower, and connect their related common pipes with a female pipe with a union, or separate the shelf to make it a tabletop structure.

10. A fluid fuel combustion furnace according to claim 9, characterized in that: The circuit bridge inside the square tube intersects with the furnace support through a through hole, through which wires designed for the combustion furnace are inserted. Several holes are drilled on the bottom surface of the square tube, and the holes are edged with plastic sleeves.

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