A liquid fuel combustion device

Abstract

This utility model discloses a liquid fuel combustion device, including a lower seat assembly, an upper seat assembly, an ejector device, a ignition assembly, an upper ignition port, an air inlet pipe, and a high-pressure air passage that penetrates the lower seat housing. Advantages: It adopts a dual-function integrated design for fuel supply and combustion air supply, achieving single-system power supply through coaxial nested fuel / air injection devices; a unique cyclone guiding system and conical acceleration chamber form a composite flow field generator, creating a high-intensity rotating airflow; it employs a quick-install nozzle assembly and a detachable ignition structure, with a large-diameter flow channel and a multi-diameter ignition structure, significantly improving system combustion efficiency while ensuring atomization quality; the multi-layer ignition assembly uses a three-dimensional array of holes. The upper ignition component forms a stable flame in the main combustion zone, while the lower ignition component establishes an auxiliary combustion zone, achieving dynamic heat flow balance with the lateral diversion holes. This solution achieves functional integration through structural innovation, simplifying system composition while improving overall performance.

Description

Technical Field

[0001] This utility model relates to the field of commercial kitchen equipment technology, specifically to a liquid fuel combustion device. Background Technology

[0002] In existing commercial stoves with high heat load requirements, liquid fuel combustion devices have the following technical defects:

[0003] 1. Multi-equipment dependency: The system requires simultaneous configuration of fuel supply equipment, high-pressure blowers, and air compressors, resulting in low system integration and large space occupation. Air compressors are prone to generating high-frequency noise during long-term operation and also suffer from excessive energy consumption and increased equipment failure rates.

[0004] 2. Bottleneck in atomization efficiency: Conventional nozzles rely on air compressors for secondary atomization. When using ordinary high-pressure fans, although the airflow is not low, the turbulent airflow organization leads to uneven oil-air mixing, incomplete combustion, high carbon monoxide content, and low combustion efficiency.

[0005] 3. Reliability Defects: When the diameter of the traditional nozzle is ≤0.3mm, impurities larger than 5μm in the fuel may cause blockage, resulting in a high maintenance cycle. The use of a common igniter leads to uneven flame distribution due to its simple ignition structure, resulting in poor vaporization after atomization and temperature differences exceeding 150℃ in local high-temperature zones.

[0006] 4. Energy efficiency loss: When multiple equipment work together, the overall system efficiency is low, with the compressor accounting for a relatively high proportion of energy consumption and having a high heat loss rate. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a liquid fuel combustion device that solves the problems existing in the prior art.

[0008] The technical solution is: a liquid fuel combustion device, comprising:

[0009] The lower seat assembly includes a cylindrical lower seat housing and a base plate sealed and fixed to its bottom;

[0010] The upper seat assembly includes a cylindrical upper seat housing and an upper seat flange extending horizontally to its top edge, the upper seat flange overlapping the top of the lower seat housing;

[0011] The ejector device comprises a coaxially nested oil injection device and an air jet device, wherein:

[0012] The oil injection device includes an oil pipe that penetrates the base plate, a cyclone guide groove on the outer side of the upper end of the oil pipe, and a hemispherical oil outlet at the center of the top.

[0013] The jet device includes an air pipe with multiple air outlets circumferentially arranged, an upper end cap and a lower end cap that seal both ends of the air pipe, and a nozzle located at the center of the upper end cap.

[0014] The oil pipe extends through the lower end cap and into the air pipe. The outer wall of the oil pipe and the inner wall of the air pipe form a high-pressure air passage, which is connected to the nozzle via a cyclone guide groove.

[0015] The fire distribution assembly includes an upper fire distributor and a lower fire distributor disposed within the upper housing. The upper fire distributor is provided with multiple upper fire distribution holes, and the lower fire distributor is provided with multiple lower fire distribution holes.

[0016] The air intake pipe runs through the lower housing and connects to the high-pressure air passage.

[0017] Based on the above technical solution, the fire distribution component is further optimized as follows:

[0018] Upper flame divider: It consists of an upper flame plate with upper flame divider holes, which are evenly distributed circumferentially;

[0019] Lower flame distributor: It consists of a lower flame plate with lower flame holes, which are evenly distributed circumferentially;

[0020] The upper fire plate is wider than the lower fire plate, and multiple upper air holes are provided between the upper seat flange and the upper seat housing. Multiple side air holes are distributed circumferentially on the surface of the upper seat housing.

[0021] Based on the above technical solution, further optimization is made to arrange the upper and lower fire distribution holes at a circumferentially inclined angle, with the lower fire distribution holes arranged in at least two ring arrays around the center of the lower fire plate.

[0022] Based on the above technical solution, further optimization is made by providing a vaporization cavity with a diameter smaller than that of the upper fire plate at the lower part of the upper fire plate, the upper fire distribution hole is arranged through the upper fire plate and surrounds the vaporization cavity, a plurality of side fire distribution holes are evenly distributed around the vaporization cavity, and the lower fire plate is arranged below the side fire distribution holes and located around the vaporization cavity.

[0023] Based on the above technical solution, the vaporization chamber is further optimized by comprising an upper vaporization shell and a lower vaporization shell with different diameters, wherein the upper fire plate is connected to the upper vaporization shell and the lower fire plate is connected to the lower vaporization shell.

[0024] Based on the above technical solution, further optimization is made by providing an annular protrusion vaporization ring on the upper part of the lower fire plate, forming an inner annular groove between the vaporization ring and the vaporization cavity, and forming an outer annular groove between the vaporization ring and the upper housing, with the lower fire distribution hole penetrating through the vaporization ring.

[0025] Based on the above technical solution, the nozzle is further optimized by providing a coaxial conical cavity at the bottom and an annular positioning groove at the bottom of the cavity. The upper end of the oil pipe is embedded in the positioning groove through the conical surface to form a sealed fit.

[0026] Based on the above technical solution, the cyclone guide groove is further optimized into multiple inclined guide grooves that are evenly distributed in a ring along the tangential direction on the outside of the oil outlet.

[0027] Based on the above technical solution, further optimization is made by providing an oil pipe hole with internal threads at the center of the lower end cover, and a matching external thread at the lower end of the oil pipe, which is fixed by threaded connection. The upper part of the oil pipe hole extends to form an annular protrusion that seals with the oil pipe.

[0028] Based on the above technical solution, the liquid fuel combustion device is further optimized to include an ignition device, the discharge end of which penetrates the lower housing and the upper housing and extends to the top of the nozzle outlet.

[0029] Compared with the prior art, this utility model has the following advantages:

[0030] I. Innovation of Integrated Energy Supply System

[0031] It adopts a dual-function integrated design for fuel supply and combustion air supply, achieving single-system power supply through coaxial nested fuel / air injection devices. The innovative ejector structure utilizes high-speed airflow to simultaneously deliver and atomize liquid fuel, eliminating the dual dependence on traditional oil pumps and compressors. Combined with a double-layer igniter and a built-in vaporization chamber, it forms a three-stage enhanced process of "atomization-vaporization-combustion," allowing the fuel to undergo two phase change optimizations, significantly improving combustion completeness.

[0032] II. Upgraded Swirl Atomization Efficiency

[0033] The unique cyclone guiding system and conical acceleration cavity form a composite flow field generator, creating a high-intensity rotating airflow. This structure, through optimized fluid dynamics design, achieves uniform and fine atomized particles while increasing fuel residence time in the high-temperature region, promoting thorough fuel-air mixing. The special flow channel construction also features self-cleaning capabilities, effectively avoiding the clogging issues common in traditional microporous structures.

[0034] III. Modular Long-Term Maintenance System

[0035] Employing quick-install nozzle assemblies and a detachable igniter structure, the large-aperture flow channel combined with a multi-aperture ignition structure significantly improves system combustion efficiency while ensuring atomization quality. Standardized design of key components greatly reduces the time required for routine cleaning and maintenance.

[0036] IV. Intelligent Thermal Distribution Control

[0037] The multi-layered flame distribution assembly constructs a gradient temperature field through a three-dimensional array of holes. The upper flame distribution unit forms a stable flame in the main combustion zone, while the lower flame distribution unit establishes an auxiliary combustion zone, achieving dynamic heat flow balance in conjunction with lateral diversion holes. This structure improves flame distribution uniformity by more than two times and effectively eliminates localized high-temperature hotspots.

[0038] V. Environmentally Friendly Energy Efficiency Optimization

[0039] The entire unit employs a streamlined air duct and acoustic damping structure, optimizing the airflow path to reduce turbulent noise. The split-type insulation layer design controls heat loss while enabling waste heat recovery and utilization, forming a highly efficient thermal circulation system that further vaporizes the atomized liquid fuel. The special combustion chamber configuration promotes complete fuel oxidation, reducing harmful gas emissions to one-quarter of those achieved with conventional technologies.

[0040] This solution achieves functional integration through structural innovation, which simplifies the system composition while improving overall performance. It features convenient installation, stable operation, and simple maintenance, making it particularly suitable for commercial scenarios with stringent requirements for space utilization and energy efficiency. Attached Figure Description

[0041] Figure 1 This is a perspective view of the present invention;

[0042] Figure 2 This is a cross-sectional view of Embodiment 2 of this utility model;

[0043] Figure 3 This is a half-sectional perspective view of Embodiment 2 of this utility model;

[0044] Figure 4 This is a perspective view of the upper ignition distributor, lower ignition distributor, and vaporization chamber of Embodiment 2 of this utility model;

[0045] Figure 5 This is a half-sectional view of the upper ignition distributor, lower ignition distributor, and vaporization chamber of Embodiment 2 of this utility model;

[0046] Figure 6 This is a half-sectional view of the upper fire distributor, lower fire distributor, and upper base assembled in Embodiment 1 of this utility model;

[0047] Figure 7 This is a three-dimensional sectional view of the upper fire distributor, lower fire distributor, and upper base assembled in Embodiment 1 of this utility model;

[0048] Figure 8 This is a cross-sectional view of the ejector device in this utility model;

[0049] Figure 9 This is a three-dimensional sectional view of the trachea in this utility model;

[0050] Figure 10 This is a perspective view of the oil pipe in this utility model;

[0051] Figure 11 This is a top view of the oil pipe in this utility model, and the arrow points to the flow trajectory of the high-pressure air.

[0052] Among them, 1, oil injection device, 101, oil pipe, 102, conical surface, 103, cyclone guide groove, 104, oil outlet;

[0053] 2. Jet device, 201. High-pressure air passage, 202. Air pipe, 203. Air outlet, 204. Upper end cover, 205. Nozzle, 206. Conical cavity, 207. Annular positioning groove, 208. Lower end cover, 209. Oil pipe hole, 210. Annular protrusion;

[0054] 3. Air intake pipe;

[0055] 4. Lower seat, 401. Lower seat shell, 402. Lower seat bottom plate;

[0056] 5. Upper seat; 501. Upper seat housing; 502. Upper seat flange; 503. Upper seat base plate; 504. Flame hole; 505. Side air hole; 506. Upper air hole; 507. Upper combustion chamber; 508. Lower combustion chamber.

[0057] 6. Upper ignition device, 601. Upper ignition port;

[0058] 7. Lower ignition distributor; 701. Lower ignition port; 702. Vaporizing ring; 703. Inner ring groove; 704. Outer ring groove;

[0059] 8. Lower vaporization shell; 800. Vaporization chamber; 801. Side ignition port;

[0060] 9. Upper vaporization shell;

[0061] 10. Ignition device. Detailed Implementation

[0062] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0063] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Example

[0065] Reference Figure 1 , Figure 6-11 A liquid fuel combustion device includes a lower base assembly, comprising a lower base housing 401 and a bottom plate 402. The lower base housing is a cylindrical structure surrounded by a circumferential side wall, and the bottom plate 402 is sealed and fixed to the bottom of the lower base housing 401.

[0066] The upper seat assembly includes an upper seat housing 501 and an upper seat flange 502. The upper seat housing 501 is a cylindrical structure surrounded by peripheral sidewalls. The upper seat flange 502 extends horizontally to the top edge of the upper seat housing 501 and overlaps with the top of the lower seat housing 401.

[0067] The ejector device includes a coaxially nested oil injection device 1 and an air jet device 2:

[0068] The oil injection device 1 includes an oil pipe 101, with a cyclone guide groove 103 on the outer side of the upper end of the oil pipe 101 and an oil outlet 104 at the center of the top.

[0069] The jet device 2 includes an air pipe 202, an upper end cap 204 and a lower end cap 208 that seal the upper and lower ends of the air pipe 202, and multiple air outlets 203 are provided around the air pipe 202. A nozzle 205 is provided at the center of the upper end cap 204.

[0070] The oil pipe 101 passes through the lower end cap 208 and extends into the air pipe 202. A high-pressure air passage 201 is formed between the outer wall of the oil pipe 101 and the inner wall of the air pipe 202. The high-pressure air passage 201 is connected to the nozzle 205 through the cyclone guide groove 103.

[0071] The fire distribution assembly includes an upper fire distributor 6 and a lower fire distributor 7 disposed in the upper housing 501. The upper fire distributor 6 is provided with a plurality of upper fire distributor holes 601, and the lower fire distributor 7 is provided with a plurality of lower fire distributor holes 701.

[0072] The air intake pipe 3 passes through the lower housing 401 and is connected to the high-pressure air passage 201.

[0073] The upper flame divider 6 includes an upper flame plate and an upper flame dividing hole 601 disposed on the upper flame plate. The lower flame divider 7 includes a lower flame plate and a lower flame dividing hole 701 disposed on the lower flame plate. The upper flame dividing holes 601 are evenly distributed around the upper flame plate, and the lower flame dividing holes 701 are evenly distributed around the lower flame plate. The width of the upper flame plate is greater than the width of the lower flame plate. Multiple vertically penetrating upper air holes 506 are evenly distributed between the upper seat flange 502 and the upper seat housing 501. Multiple side air holes 505 are evenly distributed on the surface of the upper seat housing 501.

[0074] The upper ignition port 601 and the lower ignition port 701 are set at a circumferentially inclined angle, and the lower ignition port 701 is arranged in at least two ring arrays around the center of the lower ignition plate.

[0075] The nozzle 205 has a coaxial conical cavity 206 at its lower part, and an annular positioning groove 207 at the bottom of the conical cavity 206. The upper end of the oil pipe 101 is embedded in the annular positioning groove 207 through the conical surface 102.

[0076] The oil outlet 104 is an upwardly convex hemispherical structure, and the cyclone guide groove 103 is a series of inclined guide grooves evenly distributed in a ring along the tangential direction on the outer side of the oil outlet 104.

[0077] The lower end cap 208 has an oil pipe hole 209 with internal threads at its center, and the lower end of the oil pipe 101 has a matching external thread; the upper part of the oil pipe hole 209 extends to form an annular protrusion 210, and the lower end of the oil pipe 101 is fixed in the oil pipe hole 209 by threaded connection.

[0078] It also includes an ignition device 10, the discharge end of which passes through the lower housing 401 and the upper housing 501 and extends above the nozzle 205 outlet. Example

[0079] Reference Figure 1-5 , Figure 8-11 A liquid fuel combustion device includes a lower base assembly, comprising a lower base housing 401 and a bottom plate 402. The lower base housing is a cylindrical structure surrounded by a circumferential side wall, and the bottom plate 402 is sealed and fixed to the bottom of the lower base housing 401.

[0080] The upper seat assembly includes an upper seat housing 501 and an upper seat flange 502. The upper seat housing 501 is a cylindrical structure surrounded by peripheral sidewalls. The upper seat flange 502 extends horizontally to the top edge of the upper seat housing 501 and overlaps with the top of the lower seat housing 401.

[0081] The ejector device includes a coaxially nested oil injection device 1 and an air jet device 2:

[0082] The oil injection device 1 includes an oil pipe 101, with a cyclone guide groove 103 on the outer side of the upper end of the oil pipe 101 and an oil outlet 104 at the center of the top.

[0083] The jet device 2 includes an air pipe 202, an upper end cap 204 and a lower end cap 208 that seal the upper and lower ends of the air pipe 202, and multiple air outlets 203 are provided around the air pipe 202. A nozzle 205 is provided at the center of the upper end cap 204.

[0084] The oil pipe 101 passes through the lower end cap 208 and extends into the air pipe 202. A high-pressure air passage 201 is formed between the outer wall of the oil pipe 101 and the inner wall of the air pipe 202. The high-pressure air passage 201 is connected to the nozzle 205 through the cyclone guide groove 103.

[0085] The fire distribution assembly includes an upper fire distributor 6 and a lower fire distributor 7 disposed in the upper housing 501. The upper fire distributor 6 is provided with a plurality of upper fire distributor holes 601, and the lower fire distributor 7 is provided with a plurality of lower fire distributor holes 701.

[0086] The air intake pipe 3 passes through the lower housing 401 and is connected to the high-pressure air passage 201.

[0087] The upper flame divider 6 includes an upper flame plate and an upper flame dividing hole 601 disposed on the upper flame plate. The lower flame divider 7 includes a lower flame plate and a lower flame dividing hole 701 disposed on the lower flame plate. The upper flame dividing holes 601 are evenly distributed around the upper flame plate, and the lower flame dividing holes 701 are evenly distributed around the lower flame plate. The width of the upper flame plate is greater than the width of the lower flame plate. Multiple vertically penetrating upper air holes 506 are evenly distributed between the upper seat flange 502 and the upper seat housing 501. Multiple side air holes 505 are evenly distributed on the surface of the upper seat housing 501.

[0088] The upper flame plate has a vaporization chamber 800 with a width smaller than that of the upper flame plate. Multiple side flame distribution holes 801 are evenly distributed around the vaporization chamber 800. A lower flame plate is set below the side flame distribution holes 801 and is located around the vaporization chamber 800.

[0089] The vaporization chamber 800 includes an upper vaporization shell 9 and a lower vaporization shell 8. The diameter of the upper vaporization shell 9 is smaller than the diameter of the lower vaporization shell 8. The upper firing plate is connected to the upper vaporization shell 9, and the lower firing plate is connected to the lower vaporization shell 8.

[0090] The upper part of the lower fire plate is provided with an annular protrusion vaporization ring 702, and the lower fire distribution hole 701 is provided through the vaporization ring 702. An inner annular groove 703 is formed between the vaporization ring 702 and the lower vaporization shell 8, and an outer annular groove 704 is formed between the vaporization ring 702 and the upper housing 501.

[0091] The nozzle 205 has a coaxial conical cavity 206 at its lower part, and an annular positioning groove 207 at the bottom of the conical cavity 206. The upper end of the oil pipe 101 is embedded in the annular positioning groove 207 through the conical surface 102.

[0092] The oil outlet 104 is an upwardly convex hemispherical structure, and the cyclone guide groove 103 is a series of inclined guide grooves evenly distributed in a ring along the tangential direction on the outer side of the oil outlet 104.

[0093] The lower end cap 208 has an oil pipe hole 209 with internal threads at its center, and the lower end of the oil pipe 101 has a matching external thread; the upper part of the oil pipe hole 209 extends to form an annular protrusion 210, and the lower end of the oil pipe 101 is fixed in the oil pipe hole 209 by threaded connection.

[0094] It also includes an ignition device 10, the discharge end of which passes through the lower housing 401 and the upper housing 501 and extends above the nozzle 205 outlet.

[0095] When the high-pressure blower starts, the high-pressure airflow enters the high-pressure air passage 201 through the inlet pipe 3. With the conical cavity 206 and the conical surface 102 of the oil pipe 101 sealing together, the airflow is divided into two paths:

[0096] Main airflow path: A high-speed swirling flow is formed along the tangential direction of the cyclone guide groove 103, which propels the liquid fuel to be injected upward from the oil outlet 104 and accelerated atomized in the conical cavity 206. The atomized fuel is injected into the lower combustion chamber 508 through the nozzle 205.

[0097] Auxiliary airflow path: Part of the airflow enters the air chamber between the upper seat 5 and the lower seat 4 through the circumferential air outlet 203 of the air pipe 202.

[0098] The discharge end of the ignition device 10 is located above the outlet of the nozzle 205, igniting the atomized fuel in the lower combustion chamber 508. The initial flame is injected upward from the lower ignition port 701 of the lower igniter 7, heating the lower ignition plate and the vaporization ring 702 to form a high-temperature radiant surface.

[0099] 3. Fuel vaporization and secondary combustion (Example 1 does not include this vaporization process)

[0100] Unburned fuel treatment: The incompletely burned atomized fuel enters the vaporization chamber 800 under inertia and comes into contact with the high-temperature surfaces of the upper vaporization shell 9 and lower vaporization shell 8, completing the phase change from liquid to gas.

[0101] Diffusion combustion: Vaporized fuel is injected into the outer combustion zone through the side flare port 801 and combines with the swirling flame of the upper flare port 601 of the upper flare port 6 to form a three-dimensional combustion field.

[0102] Lateral oxygen supply: The auxiliary airflow is injected into the lower combustion chamber 508 through the side air hole 505, forming an annular air curtain that wraps around the flame root.

[0103] Axial oxygen supply: The airflow is vertically injected into the main combustion zone through the upper air hole 506 to enhance the oxidation reaction.

[0104] Temperature gradient: The lower flameout port 701 and the side flameout port 801 work together to form a uniform thermal field between the core area and the outer area. (This process is not present in Example 1.)

[0105] The combustion exhaust gas has a longer residence time under the guidance of the multi-layer fire distribution structure, which ensures that harmful gases (such as CO) are fully oxidized into CO2 and finally discharged through the emission channel, in compliance with environmental protection standards.

[0106] In Example 1, after the flame is burned in the lower combustion chamber 508, it enters the upper combustion chamber 507 through the lower flare hole 701 and is vaporized at high temperature. Then, the main flame is ejected upward through the upper flare hole 601. In Example 1, there is no vaporization process of entering the vaporization chamber 800.

[0107] Integrated atomization: The cyclone guide groove 103 and the conical cavity 206 are coupled to achieve efficient fuel atomization. Figure 8-11 ).

[0108] Self-sustaining thermal cycle: Combustion heat is fed back through the vaporization chamber 800, reducing external energy consumption.

[0109] Anti-carbon buildup design: The large-aperture nozzle 205 works in conjunction with the swirl to reduce the risk of clogging.

[0110] This device is compatible with liquid fuels such as ethylene glycol, white oil, and methanol. By adjusting the high-pressure air volume and the oil supply pressure of oil pipe 101, it can be adapted to the combustion requirements of different fuels.

[0111] This process achieves efficient and clean combustion through precise airflow distribution, multi-stage combustion enhancement, and thermal field control, making it suitable for high-heat-load scenarios such as commercial kitchens.

[0112] Any unmentioned structures and connections are common knowledge.

[0113] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A liquid fuel combustion apparatus, characterized by, include: The lower seat assembly includes a cylindrical lower seat housing and a base plate sealed and fixed to its bottom; The upper seat assembly includes a cylindrical upper seat housing and an upper seat flange extending horizontally to its top edge, the upper seat flange overlapping the top of the lower seat housing; The ejector device comprises a coaxially nested oil injection device and an air jet device, wherein: The oil injection device includes an oil pipe that penetrates the base plate, a cyclone guide groove on the outer side of the upper end of the oil pipe, and a hemispherical oil outlet at the center of the top. The jet device includes an air pipe with multiple air outlets circumferentially arranged, an upper end cap and a lower end cap that seal both ends of the air pipe, and a nozzle located in the center of the upper end cap. The oil pipe extends through the lower end cap and into the air pipe. The outer wall of the oil pipe and the inner wall of the air pipe form a high-pressure air passage, which is connected to the nozzle via a cyclone guide groove. The fire distribution assembly includes an upper fire distributor and a lower fire distributor disposed within the upper housing. The upper fire distributor is provided with multiple upper fire distribution holes, and the lower fire distributor is provided with multiple lower fire distribution holes. The air intake pipe runs through the lower housing and connects to the high-pressure air passage.

2. The liquid fuel combustion device according to claim 1, characterized in that: The fire distribution assembly includes: Upper flame divider: It consists of an upper flame plate with upper flame divider holes, which are evenly distributed circumferentially; Lower flame distributor: It consists of a lower flame plate with lower flame holes, which are evenly distributed circumferentially; The upper fire plate is wider than the lower fire plate, and multiple upper air holes are provided between the upper seat flange and the upper seat housing. Multiple side air holes are distributed circumferentially on the surface of the upper seat housing.

3. A liquid fuel combustion device according to claim 2, characterized in that: Both the upper and lower ignition holes are arranged at a circumferentially inclined angle, and the lower ignition holes are arranged in at least two ring arrays around the center of the lower ignition plate.

4. A liquid fuel combustion device according to claim 2, characterized in that: The lower part of the upper fire plate is provided with a vaporization cavity with a diameter smaller than that of the upper fire plate. The upper fire distribution hole is arranged through the upper fire plate and surrounds the vaporization cavity. Multiple side fire distribution holes are evenly distributed around the vaporization cavity. The lower fire plate is arranged below the side fire distribution holes and located around the vaporization cavity.

5. A liquid fuel combustion device according to claim 4, characterized in that: The vaporization chamber is composed of an upper vaporization shell and a lower vaporization shell with different diameters. The upper fire plate is connected to the upper vaporization shell, and the lower fire plate is connected to the lower vaporization shell.

6. A liquid fuel combustion device according to claim 4, characterized in that: The lower fire plate has an annular protrusion vaporization ring on its upper part. An inner annular groove is formed between the vaporization ring and the vaporization cavity, and an outer annular groove is formed between the vaporization ring and the upper housing. The lower fire distribution hole is set through the vaporization ring.

7. A liquid fuel combustion device according to claim 1, characterized in that: The nozzle has a coaxial conical cavity at its lower part, and an annular positioning groove at the bottom of the cavity. The upper end of the oil pipe is embedded in the positioning groove through the conical surface to form a sealed fit.

8. A liquid fuel combustion device according to claim 1, characterized in that: The cyclone guide groove consists of multiple inclined guide grooves evenly distributed in a ring along the tangential direction on the outer side of the oil outlet.

9. A liquid fuel combustion device according to claim 1, characterized in that: The lower end cap has an oil pipe hole with internal threads at its center, and the lower end of the oil pipe has a matching external thread and is fixed by threaded connection. The upper part of the oil pipe hole extends to form an annular protrusion that seals with the oil pipe.

10. A liquid fuel combustion device according to claim 1, characterized in that: The liquid fuel combustion device further includes an ignition device, the discharge end of which passes through the lower housing and the upper housing and extends above the nozzle outlet.

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