Multi-stage cracking combustion system capable of precisely controlling slow fire

Abstract

The invention relates to the technical field of combustion equipment, in particular to a combustion system for multi-stage cracking combustion with fine control over slow fire, a cyclone air inlet assembly and a cracking combustion assembly are arranged in a stove frame assembly, the cracking combustion assembly comprises a cracking cylinder, the cyclone air inlet assembly comprises an air inlet cylinder, and a fuel oil cavity is formed in the center of the air inlet cylinder; the fuel oil cavity is connected with an oil supply assembly through a fuel oil opening, the air inlet end of the air inlet cylinder is connected with a fan, the cracking cylinder is arranged in the air inlet cylinder, an oil control opening is formed in the bottom of the cracking cylinder, a plurality of vertex angles and base angles are evenly distributed on the oil control opening at intervals, and the base angles are obtuse angles; each base angle can be regarded as an independent blunt body structure, namely a blunt body angle, when fuel oil airflow passes through the blunt body, a small-size vortex is formed behind the blunt body, the vortex of the part can further achieve the effects of pre-evaporation and pre-cracking on fuel oil, and then accurate control over multi-stage slow fire is achieved.

Description

Technical Field

[0001] This invention relates to the field of combustion equipment technology, specifically to a multi-stage pyrolysis combustion system with precise heat control. Background Technology

[0002] Commercial combustion stoves are widely used in schools, military units, restaurants, hotels and other places where multiple people need to cook. They generally use liquefied petroleum gas (LPG) as fuel. Traditional LPG has problems such as low calorific value, high cost, low flash point, flammability and explosiveness, and great safety hazards. LPG (liquefied natural gas) is a very clean fuel. LPG (liquefied natural gas) is used in large quantities in households and commercial applications, and shortages often occur.

[0003] Currently, in the commercial combustion stove sector, research is underway on stoves using liquid fuel oil as a fuel source, which could replace liquefied petroleum gas (LPG) and alleviate LPG shortages. Commercial combustion stoves are primarily used in high-powered Chinese cooking stoves and large wok stoves, which are not ideal for low-heat control. Besides high-heat applications, other kitchen appliances such as steamers, braising pots, cooking ovens, clay pot stoves, and heaters require low-heat operation (i.e., low-heat stoves need to be researched). For example, electric stoves cannot achieve low heat, the heating element is easily damaged, and heat control is difficult; gas-push stoves are noisy and the gas pump is prone to damage; and electric spray stoves cannot achieve precise low-heat control.

[0004] Based on the above problems, there is an urgent need to study a combustion system that can achieve multi-stage pyrolysis combustion with precise control of heat. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage pyrolysis combustion system with precise control of the pyrolysis flame, which is used to achieve precise control of the multi-stage pyrolysis flame.

[0006] This invention is achieved through the following technical solution:

[0007] A multi-stage pyrolysis combustion system with precise heat control includes a stove frame assembly. The stove frame assembly houses a cyclone intake assembly and a pyrolysis combustion assembly. The pyrolysis combustion assembly includes a pyrolysis cylinder, and the cyclone intake assembly includes an intake cylinder. A fuel chamber is located at the center of the intake cylinder, connected to a fuel supply assembly via a fuel inlet. A fan is connected to the intake end of the intake cylinder. The pyrolysis cylinder is located within the intake cylinder and has an oil control port at its bottom. The oil control port is evenly spaced with several apex and bottom angles, all of which are obtuse angles. From bottom to top, the pyrolysis cylinder comprises a vortex zone, a pyrolysis zone, and a combustion zone. When fuel passes through the oil control port, a blunt vortex is formed in the vortex zone. When fuel passes through the vortex zone, a secondary vortex is formed in the pyrolysis zone for pre-pyrolysis. When fuel passes through the pyrolysis zone, combustion occurs in the combustion zone. Air inlets are provided on the outer periphery of the vortex zone, pyrolysis zone, and combustion zone, and these air inlets communicate with the intake cylinder.

[0008] Currently, in the field of commercial combustion stoves, research is being conducted on stoves that use liquid fuel oil as a fuel source, which can replace liquefied petroleum gas (LPG) fuel and alleviate the shortage of LPG. Taking electric heating stoves as an example, they cannot achieve low flame, the heating element is easily damaged, and it is not convenient to control the flame. For gas push stoves, they are noisy during use, and the air pump is easily damaged. For electric injection stoves, they cannot achieve precise control of low flame.

[0009] Furthermore, liquid fuels require high pressure to ensure atomization, thus necessitating significant electrical power. A 220V power supply and external wiring are required, limiting the usability of liquid fuel stoves and preventing independent outdoor use. Moreover, existing electronic fuel injection stoves cannot be adjusted to a low flame because this reduces the amount of fuel entering the burner, resulting in reduced pressure at the nozzle and insufficient atomization. Therefore, there is a minimum flow rate requirement under certain pressure; for example, a 0.65mm diameter atomizing nozzle requires a minimum flow rate of 700g / h. Consequently, existing electronic fuel injection stoves are only suitable for high-heat stir-frying environments such as restaurant kitchens and canteens, and cannot be used in environments requiring lower heat, such as hot pot restaurants and clay pot rice restaurants.

[0010] Based on the above problems, the applicant proposes a multi-stage pyrolysis combustion system with precise flame control. The combustion system is designed as a combined structure of a cyclone intake assembly and a pyrolysis combustion assembly. The cyclone intake assembly provides the oxygen required for complete combustion, while the pyrolysis combustion assembly provides the space for complete combustion. Furthermore, within the pyrolysis combustion assembly, a vortex zone, a pyrolysis zone, and a combustion zone are sequentially designed. The vortex zone is achieved through a blunt-body intake structure. Specifically, the oil control port is an axisymmetric structure centered on the pyrolysis cylinder axis, with identical structure and dimensions between each apex and base corner. Figure 5It can be seen that the outlet of different areas of the entire flow channel of the pyrolysis cylinder is equivalent to a leeward side. The gas is affected by the low pressure zone in the center of the combustion chamber and forms a reflux zone in the center, which is called the main reflux zone of the entire pyrolysis chamber. Each bottom corner can be regarded as an individual blunt body structure, that is, a blunt body angle. When the fuel gas flow passes through this blunt body, it will form a small vortex behind it. This part of the vortex can also play a role in pre-evaporation and pre-pyrolysis of the fuel, thereby realizing the precise control of multi-stage smoldering.

[0011] Furthermore, the minimum diameter of the vortex zone, the cracking zone, and the combustion zone decreases along the fuel flow direction, and a step is provided at the junction of the vortex zone, the cracking zone, and the combustion zone. The step serves as a common boundary. When fuel passes through the step, a low-pressure backflow surface is formed on the inner side of the step, and a blunt body vortex and a secondary vortex are formed in sequence.

[0012] Furthermore, the pyrolysis cylinder is also equipped with several simmering flame control components. The size of the opening inside the simmering flame control components is proportional to the gas flow rate through them, and the opening inside the simmering flame control components is infinitely controlled by controlling the wind speed of the fan.

[0013] Furthermore, the precise control assembly includes: a control frame fixedly mounted to the pyrolysis cylinder, a rotary disc rotatably mounted to the pyrolysis cylinder, and several opening plates. Limiting rods are provided on the opening plates. Limiting rings matching the limiting rods are provided on the rotary disc. Limiting grooves matching the limiting rods are provided on the control frame. The opening plates are connected together by the limiting rods, limiting rings, and limiting grooves to form an opening that allows fuel to pass through. Several impellers are evenly distributed around the outer circumference of the rotary disc. A spring is also provided in the limiting groove, and the end of the spring is connected to the limiting rod.

[0014] Furthermore, when the spring is in a compressed state and the opening is stable, the torque of the turntable and the compression force of the spring remain in balance.

[0015] Furthermore, when the wind speed of the blower increases, the torque of the rotor disk is greater than the compression force of the spring, the opening increases, and the amount of fuel passing through the opening increases.

[0016] Furthermore, when the wind speed of the blower decreases, the torque of the rotor is less than the compression force of the spring, the opening decreases, and the amount of fuel passing through the opening decreases.

[0017] Preferably, the lower end face of the air intake cylinder is provided with a plurality of fan blades, and the middle part of the plurality of fan blades is rotatably disposed with respect to the lower end face of the air intake cylinder.

[0018] Preferably, the pyrolysis combustion assembly is further provided with an ignition assembly.

[0019] Preferably, the fuel port is connected to a fuel supply assembly.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] 1. This invention designs the combustion system as a combination of a cyclone intake assembly and a pyrolysis combustion assembly. The cyclone intake assembly provides the oxygen required for complete combustion, while the pyrolysis combustion assembly provides the space for complete combustion. Furthermore, within the pyrolysis combustion assembly, a vortex zone, a pyrolysis zone, and a combustion zone are sequentially designed. The vortex zone is achieved through a blunt-body intake structure. Specifically, the fuel control port is an axisymmetric structure centered on the axis of the pyrolysis cylinder. Each apex and base corner has the same structure and dimensions. The outlets of different regions in the entire flow channel of the pyrolysis cylinder are equivalent to a leeward surface. The gas is affected by the low-pressure zone in the center of the combustion chamber, forming a recirculation zone in the center, which is called the main recirculation zone of the entire pyrolysis chamber. Each base corner can be regarded as an individual blunt-body structure, i.e., a blunt-body angle. When the fuel gas flow passes through this blunt-angled body, it will form a small-sized vortex behind it. This part of the vortex can also play a role in pre-evaporation and pre-pyrolysis of the fuel, thereby achieving precise control of multi-stage pyrolysis.

[0022] 2. This invention forms a low-pressure backflow surface by setting a step at the junction of the vortex zone, the cracking zone, and the combustion zone. This helps the fuel to form blunt body vortices and secondary vortices when passing through the step, further promoting the pre-evaporation and pre-cracking of the fuel, and improving the stability and efficiency of combustion. The design of the above structure allows the combustion system to adjust the firepower more flexibly, meeting the strict requirements of commercial kitchens for firepower control, while also improving combustion safety and reducing the safety risks caused by incomplete combustion.

[0023] 3. This invention combines the regulation and control of wind power and fuel through a precise flame control component. When the wind power is increased, there will be a matching amount of fuel to undergo a combustion reaction. When the wind power is decreased, the amount of fuel to be burned will also decrease. In the above process, the matching of wind power and fuel will always be maintained, that is, both are complete combustion processes. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the combustion system of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the combustion system of the present invention;

[0027] Figure 3 This is a schematic diagram of the cyclone intake assembly and the pyrolysis combustion assembly of the present invention;

[0028] Figure 4 This is a schematic cross-sectional view of the cyclone intake assembly and the pyrolysis combustion assembly.

[0029] Figure 5 This is a schematic diagram of the pyrolysis combustion assembly.

[0030] Figure 6 This is a schematic diagram of the cyclone intake assembly from an axial perspective.

[0031] Figure 7 This is a cross-sectional structural diagram of the cyclone intake assembly and the pyrolysis combustion assembly in Embodiment 2 of the present invention;

[0032] Figure 8 This is a structural diagram of the simmering heat control component;

[0033] Figure 9 This is a schematic diagram of the internal structure of the simmering fire control component.

[0034] The attached diagram shows the markings and corresponding component names:

[0035] 1-Stove rack assembly, 2-Cyclone air intake assembly, 3-Crack combustion assembly, 4-Ignition assembly, 5-Oil supply assembly, 6-Precision simmering control assembly;

[0036] 21-Air intake cylinder, 22-Fuel chamber, 23-Fuel port, 24-Blower, 25-Fan blade;

[0037] 31-Cracking cylinder, 32-Oil control port, 33-Bottom corner, 34-Top corner, 35-Air inlet, 36-Step;

[0038] 311 - Vortex zone, 312 - Cracking zone, 313 - Combustion zone;

[0039] 61-Control frame, 62-Rotator, 63-Opening plate, 64-Limit rod, 65-Limit ring, 66-Limit groove, 67-Spring, 68-Impeller. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. It should be noted that this invention is already in the actual research and development stage.

[0041] Example 1:

[0042] Please refer to the attached document as well. Figures 1 to 6A multi-stage pyrolysis combustion system with precise heat control includes a stove frame assembly 1. The stove frame assembly 1 is equipped with a cyclone air intake assembly 2 and a pyrolysis combustion assembly 3. The pyrolysis combustion assembly 3 includes a pyrolysis cylinder 31. The cyclone air intake assembly 2 includes an air intake cylinder 21. A fuel chamber 22 is provided at the center of the air intake cylinder 21. The fuel chamber 22 is connected to a fuel supply assembly 5 through a fuel port 23. A fan 24 is connected to the air intake end of the air intake cylinder 21. The pyrolysis cylinder 31 is disposed inside the air intake cylinder 21 and has an oil control port 32 at its bottom. The oil control port 32 is evenly distributed with a plurality of apex angles 34 and bottom angles 33, and the plurality of bottom angles 33 are all obtuse angles.

[0043] The pyrolysis cylinder 31 consists of a vortex zone 311, a pyrolysis zone 312, and a combustion zone 313 from bottom to top. When fuel passes through the fuel control port 32, a blunt vortex is formed in the vortex zone 311. When fuel passes through the vortex zone 311, a secondary vortex is formed in the pyrolysis zone 312 and pre-pyrolysis is performed. When fuel passes through the pyrolysis zone 312, combustion is performed in the combustion zone 313. Air inlets 35 are provided on the outer periphery of the vortex zone 311, the pyrolysis zone 312, and the combustion zone 313. The air inlets 35 are connected to the air intake cylinder 21.

[0044] It should be noted that in existing technologies, the combustion method of electronically injected fuel stoves requires the liquid fuel to be pressurized to 12 kg to ensure that the liquid fuel sprayed from the atomizing nozzle is in a mist form. This atomized liquid fuel mixes with the air injected by the fan 24 within the stove's air chamber for combustion. The mixture is then ignited by a 20,000-volt voltage generated by the ignition needle, achieving primary combustion within the stove's air chamber. After passing through the flame ring, it is released into the burner for secondary, more complete combustion, thus heating the cookware. Furthermore, electronic injection only atomizes the liquid fuel to meet combustion conditions; it does not truly vaporize the liquid fuel, therefore, it is not easy to achieve rapid and complete combustion.

[0045] Furthermore, liquid fuels require high pressure to ensure atomization, thus necessitating significant electrical power. A 220V power supply and external wiring are required, limiting the usability of liquid fuel stoves and preventing independent outdoor use. Moreover, existing electronic fuel injection stoves cannot be adjusted to a low flame because this reduces the oil intake, resulting in lower pressure at the nozzle and insufficient atomization. Therefore, there is a minimum flow rate requirement under certain pressure; for example, a 0.65mm diameter atomizing nozzle requires a minimum flow rate of 700g / h. Consequently, existing electronic fuel injection stoves are only suitable for high-heat stir-frying environments like restaurant kitchens and canteens, and cannot be used in environments requiring lower heat, such as hot pot restaurants and clay pot rice restaurants.

[0046] Based on the above problems, the applicant proposes a multi-stage pyrolysis combustion system with precise flame control. The combustion system is designed as a combined structure of a cyclone intake assembly 2 and a pyrolysis combustion assembly 3. The cyclone intake assembly 2 provides the oxygen required for complete combustion, while the pyrolysis combustion assembly 3 provides the space for complete combustion. Furthermore, within the pyrolysis combustion assembly 3, a vortex zone 311, a pyrolysis zone 312, and a combustion zone 313 are sequentially designed. The vortex zone 311 is implemented using a blunt-body intake structure. Specifically, the oil control port 32 is an axisymmetric structure centered on the axis of the pyrolysis cylinder 31, with each apex 34 and bottom 33 having the same structure and dimensions. Figure 5 It can be seen that the outlet of different regions of the entire flow channel of the pyrolysis cylinder 31 is equivalent to a leeward side. The gas is affected by the low pressure zone in the center of the combustion chamber and forms a backflow zone in the center, which is called the main backflow zone of the entire pyrolysis chamber. Each bottom corner 33 can be regarded as an individual blunt body structure, i.e., a blunt body angle. When the fuel gas flow passes through this blunt body, it will form a small vortex behind it. This part of the vortex can also play a role in pre-evaporation and pre-pyrolysis of fuel, thereby realizing the precise control of multi-stage smoldering. In general, the fuel and air are fully mixed in the vortex zone 311.

[0047] Furthermore, for the secondary vortex, the inlet flow channel at the head of the pyrolysis chamber is similar to airflow passing through a large leeward surface. The airflow is drawn in by the low-pressure area, thus forming a blunt vortex. During the process of airflow organization at the head, affected by the step 36, the openings of the vortex zone 311 and the pyrolysis zone 312 form air walls at the corresponding positions in the pyrolysis chamber. The incoming flow at the head is blocked by the air walls and converges to the middle section. Part of it flows to the subsequent area, and part of it flows back to the combustion chamber pyrolysis zone 312 to form a secondary vortex. Similarly, the gas flow in the combustion zone 313 is similar, so it will not be described in detail here. In general, the physicochemical reactions of pre-evaporation and pre-pyrolysis are realized in the pyrolysis zone 312. Specifically, after passing through this area, most of the fuel will burn and release heat in the combustion zone 313. The main function of the combustion zone 313 is to provide sufficient residence time and high turbulence for fuel particles and oxidant to promote fuel and air mixing and provide sufficient reaction space. In addition, the pre-evaporation and pre-pyrolysis processes realized in the pyrolysis zone 312 depend on the high temperature generated in the combustion zone 313.

[0048] It should be noted that the minimum diameter of the vortex zone 311, the cracking zone 312, and the combustion zone 313 decreases along the fuel flow direction, and a step 36 is provided at the junction of the vortex zone 311, the cracking zone 312, and the combustion zone 313. The step 36 serves as a common boundary; when fuel passes through the step 36, a low-pressure backflow surface is formed inside the step 36, and a blunt body vortex and a secondary vortex are formed sequentially. It should also be noted that the minimum diameter of the vortex zone 311, the cracking zone 312, and the combustion zone 313 decreases along the fuel flow direction. This structural design is to achieve multi-stage precise control and efficient combustion of fuel in the combustion system. In the above structure, fuel first enters the vortex zone 311. The larger diameter design of this region helps to fully mix fuel and air, forming a blunt body vortex, which facilitates pre-evaporation and pre-cracking of the fuel. As the fuel flows towards the cracking zone 312, the decreasing diameter forces a more compact mixing of fuel and air, which helps to improve cracking efficiency, allowing the fuel to undergo more complete pre-cracking within the cracking zone 312. Finally, the fuel enters combustion zone 313, where the minimum diameter design ensures optimal fuel-air mixing for complete combustion. A step 36 is created at the junction of the vortex zone 311, the cracking zone 312, and the combustion zone 313, forming a low-pressure backflow surface. This helps the fuel form blunt-body vortices and secondary vortices as it passes through the step 36, further promoting pre-evaporation and pre-cracking of the fuel, thus improving combustion stability and efficiency. This structural design allows the combustion system to adjust the firepower more flexibly, meeting the stringent firepower control requirements of commercial kitchens, while also improving combustion safety and reducing safety risks caused by incomplete combustion.

[0049] Example 2:

[0050] This embodiment only describes the parts that differ from Embodiment 1, specifically: please refer to the appendix. Figures 7 to 9The pyrolysis cylinder 31 is also equipped with several simmering flame control components 6. The size of the opening within each simmering flame control component 6 is proportional to the gas flow velocity passing through it, and the opening within the simmering flame control component 6 is infinitely controlled by controlling the wind speed of the fan 24. It should be noted that in the prior art, for adjusting the flame intensity of the combustion system, such as valve adjustment, manual adjustment of the gas valve may not be precise enough, making it difficult to achieve fine flame control. The degree of automation is low, requiring manual intervention and having a slow response speed. For air ratio adjustment, improper damper adjustment may lead to incomplete combustion, increasing the emission of harmful gases such as carbon monoxide. Furthermore, damper adjustment is sensitive to environmental changes (such as air pressure changes), which may affect combustion stability. In this respect, it is understandable that damper adjustment only changes the airflow entering the combustion chamber, but the corresponding fuel supply does not change accordingly. Moreover, the above-mentioned control and adjustment methods are not suitable for precise simmering flame control. Based on the damper adjustment, the applicant designed a simmering flame control component 6. This component combines the adjustment and control of airflow and fuel. Increasing the airflow will result in a matching amount of fuel undergoing combustion, while decreasing the airflow will reduce the amount of fuel available for combustion. Throughout this process, the matching of airflow and fuel will always be maintained, ensuring complete combustion. More specifically, the simmering flame control in this embodiment is stepless, unlike the sensor and pressure adjustment methods used in existing technologies. In this embodiment, changes in airflow adjustment correspond to a specific amount of fuel, rather than adjusting specific gears.

[0051] It should be noted that the simmering and precise control assembly 6 includes: a control frame 61 fixedly disposed with the pyrolysis cylinder 31, a rotary disk 62 rotatably disposed with the pyrolysis cylinder 31, and a plurality of opening plates 63. The opening plates 63 are provided with limit rods 64, the rotary disk 62 is provided with limit rings 65 that match the limit rods 64, and the control frame 61 is provided with limit grooves 66 that match the limit rods 64. The opening plates 63 are connected to each other by the limit rods 64, the limit rings 65, and the limit grooves 66 to form an opening that allows fuel to pass through. A plurality of impellers 68 are evenly distributed on the outer circumference of the rotary disk 62. A spring 67 is also provided in the limit groove 66, and the end of the spring 67 is connected to the limit rod 64.

[0052] It should also be noted that, based on the above structure, it is understandable that when the airflow in the intake cylinder 21 passes through the rotary disc 62, it will be affected by the inclined impeller 68 on the rotary disc 62, causing the rotary disc 62 to have a relative rotational tendency. It is understood that the rotary disc 62 is preferably rotatably mounted on the pyrolysis cylinder 31 through structures such as dovetail grooves or slots. The two ends of the limiting rod 64 on the opening plate 63 are respectively placed in the limiting groove 66 and the limiting ring 65, and the limiting ring 65 on the rotary disc 62 will interact with the opening plate 63 as it rotates. Due to the relative displacement, and the action of the limiting groove 66 and the spring 67, the movement between the opening plates 63 will be manifested as the reciprocating movement of the limiting rod 64 within the limiting groove 66. All opening plates 63 will exhibit a reciprocating change in opening size, and the change in opening size is limited by the size of the fan 24. Based on the above structure, in this embodiment, the firepower problem, which is not convenient to directly control and adjust, is transformed into the wind power size, which is directly controllable and adjustable. Moreover, unlike the prior art, the variable of wind power adjustment has a corresponding fuel quantity.

[0053] It should be noted that when the spring 67 is in a compressed state and the opening is stable, the torque of the rotary disk 62 and the compressive force of the spring 67 remain balanced. It should also be noted that when the wind speed of the blower 24 increases, the torque of the rotary disk 62 exceeds the compressive force of the spring 67, the opening widens, and the amount of fuel passing through the opening increases. Conversely, when the wind speed of the blower 24 decreases, the torque of the rotary disk 62 is less than the compressive force of the spring 67, the opening narrows, and the amount of fuel passing through the opening decreases.

[0054] The working principle of the precise fuel flow control component 6 is based on mechanical linkage and fluid dynamics. This component consists of a control frame 61 fixed to the pyrolysis cylinder 31, a rotating impeller 62, and several opening plates 63. The limiting rods 64 on the opening plates 63 cooperate with the limiting rings 65 on the impeller 62 and the limiting grooves 66 on the control frame 61 to form an adjustable fuel flow opening. The impeller 68 on the outer periphery of the impeller 62 drives the impeller 62 to rotate under the action of airflow, while the spring 67 in the limiting groove 66 provides a restoring force to the limiting rods 64, maintaining the stability of the impeller 62 in a specific position. This design makes the fuel flow control directly related to the airflow velocity generated by the blower 24, achieving precise control of the fuel flow. During operation, the airflow generated by the blower 24 enters the combustion system through the intake manifold 21. The airflow velocity affects the rotational speed of the rotary disc 62. The impeller 68 on the rotary disc 62 rotates under the action of the airflow, driving the limiting rod 64 to move within the limiting groove 66, thereby changing the relative position between the opening plates 63 and adjusting the size of the opening. When the blower speed increases, the torque of the rotary disc 62 overcomes the compressive force of the spring 67, causing the opening to enlarge and the fuel flow to increase; conversely, when the blower speed decreases, the compressive force of the spring 67 is greater than the torque of the rotary disc 62, causing the opening to shrink and the fuel flow to decrease. This design allows the system to dynamically adjust the fuel supply according to actual combustion needs, achieving precise fire control.

[0055] Traditional combustion systems often struggle to achieve precise control of low heat, especially in applications requiring fine-tuned flame control, such as commercial kitchens. This component, through a combination of mechanical linkage and airflow control, enables more flexible and precise flame adjustment, solving the technical challenges of inaccurate flame control, slow response, and difficulty in achieving low heat control in traditional combustion systems. Based on this structure, the combustion system achieves the following technical effects: improved combustion efficiency by precisely controlling fuel flow to ensure the fuel-air mixture ratio is always optimal, achieving complete combustion; enhanced safety by precisely controlling flame to reduce safety hazards caused by incomplete combustion; increased adjustment flexibility, allowing the combustion system to quickly respond to different flame demands, especially in applications requiring low heat; reduced energy consumption by precisely controlling fuel supply to avoid unnecessary energy waste; and extended equipment lifespan by reducing equipment wear and tear caused by incomplete combustion due to more complete combustion.

[0056] In this embodiment, it is preferred that the lower end face of the air intake cylinder 21 is provided with a plurality of fan blades 25, and the middle part of the plurality of fan blades 25 is rotatably disposed with respect to the lower end face of the air intake cylinder 21.

[0057] The aforementioned fan blade 25 is designed to introduce the necessary oxygen into the combustion system to support fuel combustion. The central part of the fan blade 25 is rotatably positioned relative to the lower end face of the intake cylinder 21, meaning the fan blade 25 can rotate around its central axis. This allows the fan blade 25 to rotate along with the blower 24, generating airflow. When the blower 24 operates, the fan blade 25 rotates, drawing air in from the intake end of the intake cylinder 21. Driven by the fan blade 25, the air flows along the inside of the intake cylinder 21 and eventually enters the pyrolysis combustion assembly 3. This airflow not only provides the oxygen required for combustion but also creates a cyclone effect, enhancing the mixing of air and fuel and improving combustion efficiency. During operation, after the blower 24 starts, the fan blade 25 rotates, generating suction to draw external air into the intake cylinder 21. As the air flows through the fan blade 25, its rotation accelerates the airflow, forming a concentrated airflow that flows along the internal channel of the intake cylinder 21, ultimately reaching the oil control port 32 at the bottom of the pyrolysis cylinder 31.

[0058] In this embodiment, it is preferred that the pyrolysis combustion assembly 3 is further provided with an ignition assembly 4.

[0059] In this embodiment, it is preferred that the fuel port 23 is connected to the fuel supply assembly 5.

[0060] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-stage cracking combustion system with slow fire precision control, comprising a stove frame assembly (1), characterized in that: The stove rack assembly (1) is provided with a cyclone air intake assembly (2) and a cracking combustion assembly (3), the cracking combustion assembly (3) comprising a cracking cylinder (31), the cyclone air intake assembly (2) comprising an air intake cylinder (21), a fuel cavity (22) being provided at the center of the air intake cylinder (21), the fuel cavity (22) being connected to the fuel supply assembly (5) via a fuel port (23), and a fan (24) being connected to the air intake end of the air intake cylinder (21), the cracking cylinder (31) being provided in the air intake cylinder (21) and having an oil control port (32) provided at the bottom, the oil control port (32) being evenly spaced with a plurality of top angles (34) and bottom angles (33), and the plurality of bottom angles (33) being obtuse angles; The cracking cylinder (31) comprises, from bottom to top, a trapped vortex zone (311), a cracking zone (312) and a combustion zone (313). When the fuel passes through the oil control port (32), a blunt body vortex is formed in the trapped vortex zone (311). When the fuel passes through the trapped vortex zone (311), a secondary trapped vortex is formed in the cracking zone (312) and pre-cracking is performed. When the fuel passes through the cracking zone (312), combustion is performed in the combustion zone (313). Air inlets (35) are provided on the outer peripheries of the trapped vortex zone (311), the cracking zone (312) and the combustion zone (313), and the air inlets (35) are connected to the air inlet cylinder (21).

2. A multi-stage cracking combustion system with slow fire precision control according to claim 1, characterized in that: The minimum diameters of the trapped vortex zone (311), the cracking zone (312) and the combustion zone (313) decrease along the fuel flow direction, and steps (36) are provided at the junctions of the trapped vortex zone (311), the cracking zone (312) and the combustion zone (313). The steps (36) serve as a common boundary. When the fuel passes through the steps (36), a low-pressure backflow surface is formed inside the steps (36), and a blunt body vortex and a secondary trapped vortex are formed in sequence.

3. A multi-stage cracking combustion system with slow fire precision control according to claim 1, characterized in that: The cracking cylinder (31) is also provided with a plurality of slow fire precision control components (6), the size of the openings in the slow fire precision control components (6) being proportional to the gas flow rate passing through the outside thereof, and the stepless control of the openings in the slow fire precision control components (6) is achieved by controlling the wind speed of the fan (24).

4. A multi-stage cracking combustion system with slow fire precision control according to claim 3, characterized in that: The slow fire precision control assembly (6) comprises: a control frame (61) fixedly arranged with the cracking cylinder (31), a rotating disc (62) rotatably arranged with the cracking cylinder (31), and a plurality of opening plates (63); a limiting rod (64) is arranged on the opening plate (63); a limiting ring (65) matching the limiting rod (64) is arranged on the rotating disc (62); a limiting groove (66) matching the limiting rod (64) is arranged on the control frame (61); the opening plate (63) is spliced ​​with the limiting rod (64), the limiting ring (65) and the limiting groove (66) to form an opening allowing fuel to pass through; a plurality of impellers (68) are evenly spaced on the outer periphery of the rotating disc (62); a spring (67) is also arranged in the limiting groove (66); and the end of the spring (67) is also connected to the limiting rod (64).

5. A multi-stage cracking combustion system with slow fire precision control according to claim 4, characterized in that: The spring (67) is in a compressed state, and when the opening is stable, the torque of the rotating wheel (62) and the compression force of the spring (67) are balanced.

6. A multi-stage cracking combustion system with slow fire precision control according to claim 4 or 5, characterized in that: When the wind speed of the fan (24) increases, the torque of the rotating wheel (62) is greater than the compression force of the spring (67), the opening increases, and the amount of fuel passing through the opening increases.

7. A multi-stage cracking combustion system with slow fire precision control according to claim 4 or 5, characterized in that: When the wind speed of the fan (24) decreases, the torque of the rotating wheel (62) is less than the compression force of the spring (67), the opening is reduced, and the amount of fuel passing through the opening is reduced.

8. The multi-stage pyrolysis combustion system with slow fire precision control according to claim 1, characterized in that: The lower end surface of the air intake cylinder (21) is provided with a plurality of fan blades (25), and the middle portions of the plurality of fan blades (25) are rotatably arranged with the lower end surface of the air intake cylinder (21).

9. The multi-stage cracking combustion system with slow fire precision control according to claim 1, characterized in that: The cracking and combustion component (3) is also provided with an ignition component (4).

10. A multi-stage cracking combustion system with slow fire precision control according to claim 9, characterized in that: The fuel port (23) is connected to a fuel supply assembly (5).

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