Combustion heating device for cooking and cooking system formed by same
By using a guide duct and multi-stage combustion chamber design, the system promotes thorough mixing of fuel and air and staged combustion, solving the problem of incomplete combustion, improving thermal energy utilization and heat exchange efficiency, and reducing toxic gas emissions.
Patent Information
- Application Number
- CN202520461047.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-17
AI Technical Summary
In existing combustion heating devices, fuel combustion is incomplete, resulting in low thermal energy utilization and the production of toxic gases, especially carbon monoxide, and the heat exchange efficiency is not high.
The airflow is guided into the mixing chamber by a guide duct to promote the full mixing of gaseous fuel or atomized fuel with air. Pre-combustion and step-by-step combustion are achieved through multi-stage combustion chambers to ensure the full combustion of the air-fuel mixture and efficient heat exchange in the combustion tube C.
It improves the thermal efficiency of fuel, reduces carbon monoxide emissions from incomplete combustion, increases the heat exchange area and efficiency, and achieves more efficient fuel utilization and thermal energy conversion.
Smart Images
Figure CN223840414U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a combustion heating device and a cooking system, and more particularly to a combustion heating device for cooking and a cooking system thereof. Background Technology
[0002] Fuel combustion is the process of converting chemical energy into thermal energy. This thermal energy is used to heat water to cook food or to turn water into high-temperature steam for steaming. Fuels generally include gases (such as natural gas) or liquids (such as liquid fuel oil). Taking the heating of water in a pot or boiler as an example, fuel typically burns at the bottom of the pot, resulting in significant heat loss and affecting the thermal efficiency of fuel combustion. Improving thermal efficiency is currently a key focus of technological research. Furthermore, fuel is usually burned directly at the bottom of the boiler, leading to insufficient mixing between fuel and air. While gaseous fuels mix more easily, the mixing efficiency of liquid fuel oil is often lower. This results in incomplete combustion, leading not only to low fuel efficiency but also the production of toxic gases such as carbon monoxide. Existing combustion heating devices all involve single-stage combustion at the bottom of the boiler (also known as primary combustion), which inevitably results in incomplete combustion and the production of toxic gases such as carbon monoxide. This is a major technical challenge currently facing combustion heating devices. How to effectively utilize the heat energy from fuel combustion and make fuller use of it, such as by allowing more heat energy to participate in heat exchange and turning water into steam, is another major technical challenge in existing technologies. Utility Model Content
[0003] The purpose of this utility model is to solve the technical problems pointed out in the background art, and to provide a combustion heating device for cooking and a cooking system composed thereof. The air enters the mixing chamber through the guide air duct to promote the full mixing of gaseous fuel or atomized fuel and air. The mixture is first ignited in the mixing chamber to form pre-combustion. The air-fuel mixture is transported step by step with the airflow and is burned in the combustion chamber A of the combustion cylinder A and the combustion chamber C of the combustion cylinder C. This allows the air-fuel mixture to be fully mixed and fully burned, which greatly reduces the emission of carbon monoxide gas due to incomplete combustion.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A combustion heating device for cooking includes a bellows, an inner liner cylinder inside the bellows, a guide air duct connected inside the inner liner cylinder via a sealed bottom plate, and a combustion cylinder A sealed at the top of the inner liner cylinder; the bellows has an air inlet chamber and an air inlet A communicating with the air inlet chamber; the inner cavity of the guide air duct communicates with the air inlet chamber of the bellows, and the guide air duct has several air slots distributed circumferentially; a mixing chamber is formed between the inner wall of the inner liner cylinder and the outer wall of the guide air duct; the combustion cylinder A has a combustion chamber A communicating with the mixing chamber; and several flame heat outlets A are evenly distributed on the combustion cylinder A; a combustion cylinder C is fitted outside the combustion cylinder A, and the combustion cylinder C has a combustion chamber C inside.
[0006] To better realize the combustion heating device of this utility model, a combustion cylinder B is installed outside the combustion cylinder A, which is located in the combustion chamber C inside the combustion cylinder C. The combustion cylinder B has a combustion chamber B inside, and several flame heat outlets B are opened on the combustion cylinder B. The inner liner of the air box is equipped with a fuel delivery pipe, the pipe opening of which is placed in the mixing chamber. The inner liner is equipped with an igniter corresponding to the pipe opening of the fuel delivery pipe.
[0007] A cooking system comprising a combustion heating device for cooking further includes a cooking cylinder, wherein the top of the air box is sealed to the bottom plate of the cooking cylinder, and the combustion cylinder C is sealed to the bottom plate and located in the cooking cylinder cavity of the cooking cylinder; the combustion cylinder C is connected to a flue gas heat exchange coil coiled inside the cooking cylinder, and the outlet end of the flue gas heat exchange coil passes through the cooking cylinder.
[0008] To better realize the cooking system of this utility model, a flameout protection detection needle is installed in the inner cavity of the air guide duct, and a needle through hole is opened in the center of the cylinder A. The detection end of the flameout protection detection needle passes through the needle through hole of the cylinder A. The inner wall of the inner lining cylinder is also covered with a wire mesh.
[0009] Preferably, a fan box is connected to the bottom of the air box, the bottom of the fan box is an air inlet filter plate, and a pulse pump corresponding to the fuel tank is installed inside the fan box. The pulse pump is connected to the fuel delivery pipe. A fan corresponding to the air inlet A is also installed inside the fan box.
[0010] Preferably, the combustion cylinder C is sealed and penetrated by a pipe joint A, the bottom plate of the cylinder is sealed and penetrated by a pipe joint B, the inlet end of the flue gas heat exchange coil is sealed and connected to the pipe joint A, and the outlet end of the flue gas heat exchange coil is sealed and connected to the pipe joint B.
[0011] Preferably, the air duct is composed of a cylinder A and a top plate A located at the top of the cylinder A and sealed to the top of the cylinder A. The bottom of the cylinder A has an air inlet communicating with the air inlet chamber. The inner cavity of the cylinder A is an air collecting chamber. All the air grooves are distributed circumferentially along the surface of the cylinder wall of the cylinder A. One half of the cylinder wall of the cylinder A is evenly provided with counter-wind grooves, and the other half of the cylinder wall of the cylinder A is evenly provided with forward-wind grooves.
[0012] Preferably, the combustion cylinder A consists of a cylinder B and an annular bottom plate A located on the outer side of the bottom of the cylinder B. The annular bottom plate A is bolted to the top of the inner liner cylinder for sealing connection. All flame heat outlets A are evenly distributed on the cylinder wall of the cylinder B. The top height of the inner liner cylinder is higher than the top height of the guide air duct.
[0013] Preferably, the inner liner has a fuel inlet, which is connected to a fuel inlet pipe and sealed to the fuel delivery pipe; the inner liner also has an igniter mounting hole corresponding to the fuel inlet position, and the igniter is installed in the igniter mounting hole.
[0014] Preferably, the bottom of the cooking cylinder is connected to at least three support legs, and the cooking cylinder is composed of an inner cylinder, an outer cylinder, and a heat insulation layer disposed between the inner cylinder and the outer cylinder; the inner wall of the inner cylinder has an annular protrusion with an annular step, and a steaming grid with mesh is placed on the annular step; the bottom of the cooking cylinder is connected to a drain pipe.
[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0016] (1) The combustion heating device for cooking of this utility model enters the mixing chamber through the guide air duct to promote the full mixing of gaseous fuel or atomized fuel and air. It is first ignited in the mixing chamber to form pre-combustion. The air-fuel mixture is transported step by step with the airflow and is burned in the combustion chamber A of the combustion cylinder A and the combustion chamber C of the combustion cylinder C. This allows the air-fuel mixture to be fully mixed and fully burned, which greatly reduces the emission of toxic gases such as carbon monoxide from incomplete combustion. At the same time, the full combustion makes the fuel thermal efficiency higher.
[0017] (2) In the step-by-step combustion process, the high-temperature flame and flue gas are sequentially transported and collected into the inner cavity of the combustion cylinder C by the airflow. The combustion cylinder C is placed inside the cooking cylinder and achieves efficient heat exchange. The combustion cylinder C increases the heat exchange area and promotes heat exchange efficiency through a large area of heat exchange.
[0018] (3) The cooking system of this utility model achieves orderly fuel mixing, step-by-step combustion, flue gas heat exchange and exhaust processes by multi-stage combustion and making full use of the heat of flame and flue gas, thereby improving the fuel heat utilization rate and heat exchange efficiency. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the cooking system of this utility model viewed from below;
[0020] Figure 2 This is a three-dimensional structural diagram of the cooking system of this utility model from a top view.
[0021] Figure 3 A schematic diagram of the external structure after removing the support legs and sewage pipes;
[0022] Figure 4 for Figure 3 A top-down structural diagram;
[0023] Figure 5 This is a schematic diagram of the structure of the combustion heating device for cooking according to this utility model after it is combined with the bottom plate of the cylinder and a pulse pump and a fan are installed.
[0024] Figure 6 for Figure 5 Cross-sectional view after removing the fan casing and internal components;
[0025] Figure 7 for Figure 5 A three-dimensional structural diagram showing the connection and installation of the flue gas heat exchange coils;
[0026] Figure 8 for Figure 5 A sectional view after removing the bottom plate of the cylinder;
[0027] Figure 9 for Figure 8 Schematic diagram of the structure of the middle air box;
[0028] Figure 10 for Figure 8 A three-dimensional structural diagram of the central guide vane;
[0029] Figure 11 This is a schematic diagram of the guide duct with the counter-wind sluice and the co-wind sluice arranged symmetrically in the direction of fuel entry in the embodiment;
[0030] Figure 12 for Figure 8 A three-dimensional structural diagram of the middle combustion chamber A;
[0031] Figure 13 for Figure 8 A three-dimensional structural diagram of the combustion chamber B.
[0032] The names corresponding to the reference numerals in the attached figures are as follows:
[0033] 1 - Airbox, 11 - Inner liner, 12 - Sealing base plate, 2 - Fan box, 21 - Inlet filter plate, 3 - Pulse pump, 31 - Fuel delivery pipe, 311 - Fuel inlet, 3111 - Fuel inlet direction, 312 - Fuel inlet pipe, 4 - Fan, 5 - Igniter mounting hole, 6 - Guide duct, 61 - Cylinder body A, 611 - Backflow channel, 612 - Downflow channel, 62 - Top plate A, 63 - Needle through hole, 7 - Flameout protection detection needle, 8 - Wire mesh 9 - Combustion cylinder A, 91 - Cylinder body B, 911 - Flame heat outlet A, 92 - Annular bottom plate A, 10 - Combustion cylinder B, 101 - Flame heat outlet B, 13 - Combustion cylinder C, 131 - Pipe joint A, 14 - Flue gas heat exchange coil, 15 - Cooking cylinder, 151 - Cylinder bottom plate, 1511 - Pipe joint B, 152 Inner cylinder, 153 Outer cylinder, 16 - Air inlet A, 17 Annular step, 18 Support leg, 19 Drain pipe, 20 Combustion switch. Detailed Implementation
[0034] The present invention will be further described in detail below with reference to the embodiments:
[0035] Example
[0036] A combustion heating device for cooking includes a bellows 1, with an inner liner 11 inside the bellows 1 (the bellows 1 is recessed in the middle and has an inner liner 11; in this embodiment, air enters from the bottom of the air inlet chamber of the bellows 1). A guide air duct 6 is connected inside the inner liner 11 via a sealing base plate 12, and a combustion cylinder A9 is sealed and connected to the top of the inner liner 11. The bellows 1 has an air inlet chamber and an air inlet A16 communicating with the air inlet chamber. The inner cavity of the guide air duct 6 communicates with the air inlet chamber of the bellows 1. The guide air duct 6 has several air slots distributed circumferentially. A mixing chamber is formed between the inner wall of the inner liner 11 and the outer wall of the guide air duct 6. The combustion cylinder A9 has a combustion chamber A communicating with the mixing chamber, and several flame heat outlets A911 are evenly distributed on the combustion cylinder A9. A combustion cylinder C13 is fitted outside the combustion cylinder A9, and the combustion cylinder C13 has a combustion chamber C inside.
[0037] The combustion heating device for cooking of the present invention has a combustion cylinder B10 installed outside the combustion cylinder A9, which is located in the combustion chamber C inside the combustion cylinder C13. The combustion cylinder B10 has a combustion chamber B inside, and several flame heat outlets B101 are opened on the combustion cylinder B10. The inner liner 11 of the air box 1 is equipped with a fuel delivery pipe 31, the opening of the fuel delivery pipe 31 is placed in the mixing chamber, and the inner liner 11 is equipped with an igniter corresponding to the opening of the fuel delivery pipe 31.
[0038] like Figures 1 to 13 As shown, a cooking system comprising a cooking combustion heating device includes a cooking combustion heating device and a cooking cylinder 15. The cooking combustion heating device includes a bellows 1, such as... Figure 9 As shown, in this embodiment, the air box 1 has an air inlet chamber inside, and an inner liner 11 inside the air box 1 (the air box 1 is recessed in the middle and has an inner liner 11; in this embodiment, air enters from the bottom of the air inlet chamber of the air box 1). A guide duct 6 is connected inside the inner liner 11 via a sealing base plate 12. The guide duct 6 is located inside the inner liner 11, forming a mixing chamber between the inner liner 11 and the guide duct 6. An annular sealing base plate 12 is sealingly connected between the bottom end of the inner liner 11 and the bottom end of the guide duct 6. A combustion cylinder A9 is sealed and connected to the top of the inner liner 11. An annular base plate A92 is located on the outer side of the bottom end of the combustion cylinder A9, and the annular base plate A92 is sealed and connected to the top of the inner liner 11 (for example, the annular base plate A92 is directly placed on top of the inner liner 11). Figure 8 As shown, the top height of the inner liner 11 is higher than the top height of the guide air duct 6, thus forming a channel for fuel mixing between the top of the guide air duct 6 and the annular base plate A92. A combustion tube B10 is fitted onto the outside of the combustion tube A9, with the entire combustion tube A9 located within the inner cavity of the combustion tube B10. The bottom of the combustion tube B10 is connected to either the annular base plate A92 or the top of the inner liner 11. The air box 1 has an air inlet chamber, and the air box 1 has an air inlet A16 communicating with the air inlet chamber, continuously supplying combustion-supporting air to the air box 1 through the air inlet A16.
[0039] The inner cavity of the guide duct 6 is connected to the air inlet chamber of the air box 1. The bottom of the guide duct 6 of this utility model is fully or partially open, such as... Figure 8 As shown, the inner cavity of the guide duct 6 is connected to the air inlet chamber of the air box 1; the guide duct 6 has several air slots distributed circumferentially, and a mixing chamber is formed between the inner wall of the inner liner 11 and the outer wall of the guide duct 6 (the bottom of the mixing chamber is a sealed base plate 12, which is not directly connected to the air inlet chamber of the air box 1; the mixing chamber is connected to the inner cavity of the guide duct 6 through various air slots). External air enters the air inlet chamber of the air box 1 through the air inlet A16, and then gathers in the inner cavity of the guide duct 6, as shown. Figure 10 As shown, the wall of the guide duct 6 has a circumferential distribution of air grooves (the air grooves serve to comb the air, and the airflow entering the mixing chamber after being combed by the air grooves is in a certain pattern, which enhances the mixing efficiency of gaseous fuel or atomized fuel with air and achieves more thorough mixing). After being combed by the guide duct 6, the air enters the mixing chamber to promote the mixing of gaseous fuel or atomized fuel with air. The mixture of fuel and air is called an air-fuel mixture, which is ignited for the first time in the mixing chamber (this can be called pre-combustion or first-stage combustion). During continuous combustion, the guide duct 6, the inner liner 11, and the mixing chamber are all in a high-temperature environment. If the fuel entering the mixing chamber is liquid fuel oil, it will immediately vaporize upon entry and be transported step by step.
[0040] like Figures 1 to 13As shown, the air-fuel mixture sequentially enters combustion chamber A of combustion cylinder A9 (which can be called secondary combustion), combustion chamber B of combustion cylinder B10 (which can be called tertiary combustion), and combustion chamber C of combustion cylinder C13 (which can be called quaternary combustion) for combustion in stages, so that the air-fuel mixture is fully mixed and fully combusted (greatly reducing the emission of toxic gases such as carbon monoxide from incomplete combustion, while full combustion makes the fuel thermal efficiency higher). During continuous combustion, the guide duct 6, the inner liner 11, and the mixing chamber are all in high-temperature environments. If the fuel entering the mixing chamber is liquid fuel oil, it will immediately vaporize upon entry and flow through stages. The high-temperature flame and flue gas from the combustion tube A9 enter the combustion chamber B of the combustion tube B10 through the flame heat outlet A911, and then mix before entering the combustion chamber C of the combustion tube C13 through the flame heat outlet B101. All air-fuel mixtures will be fully combusted. At the same time, the combustion flame and high-temperature flue gas will be transported through stages and converge into the inner cavity of the combustion tube C13. Since the combustion tube C13 is located inside the cooking tube 15, it achieves efficient heat exchange with the water inside the cooking tube 15 (the water surrounding the combustion tube C13). The combustion tube C13 increases the heat exchange area and promotes heat exchange efficiency. In some embodiments, the present invention provides a combustion switch 20 corresponding to the igniter, pulse pump 3, and fan 4 on the outside of the cooking drum 15. When the combustion switch 20 is turned on, the pulse pump 3 delivers fuel, the fan 4 supplies air, and the igniter performs one-button ignition. Ignition and combustion are switched on and off by one button via the combustion switch 20 (when combustion is turned on, the igniter stops igniting and fuel combustion continues).
[0041] Combustion cylinder A9 has a combustion chamber A (i.e., the inner cavity of combustion cylinder A9, with the bottom of combustion cylinder A9 serving as the chamber inlet A) that communicates with the mixing chamber. Combustion cylinder B10 has a combustion chamber B (i.e., the inner cavity of combustion cylinder B10, with the bottom of combustion cylinder B10 covered by an annular bottom plate A92). Figure 12 As shown, several flame heat outlets A911 are evenly distributed on the combustion cylinder A9 (flame heat outlets A911 connect combustion chamber A and combustion chamber B). A combustion cylinder C13 is fitted outside the combustion cylinder B10. The combustion cylinder C13 contains a combustion chamber C (i.e., the inner cavity of the combustion cylinder C13; combustion chamber C is a closed chamber); see also... Figure 13The combustion cylinder B10 has several flame heat outlets B101 (the flame heat outlets B101 connect the combustion chamber B and the combustion chamber C). The bottom of the cooking cylinder 15 is sealed with a bottom plate 151. The top of the bellows 1 is connected and fixed to the bottom plate 151 of the cooking cylinder 15 (in this embodiment, a mounting plate is fixedly installed on the bottom plate 151 of the cooking cylinder 15, and the top of the bellows 1 is detachably fixed to the mounting plate by bolts). The combustion cylinder C13 is sealed and connected to the bottom plate 151 (the top of the combustion cylinder C13 is sealed by a top plate, and the bottom of the combustion cylinder C13 can be sealed by the bottom plate, or the bottom of the combustion cylinder C13 is open and sealed to the bottom plate 151, thus forming a closed combustion chamber C; similarly, a mounting plate can also be fixedly installed on the top surface of the bottom plate 151, and the bottom of the combustion cylinder C13 is detachably fixed to the mounting plate by bolts). The combustion cylinder C13 is located in the cooking cylinder cavity of the cooking cylinder 15.
[0042] The inner liner 11 of the bellows 1 is equipped with a fuel delivery pipe 31 (this invention is mainly used for gaseous or liquid fuels; the fuel delivery pipe 31 delivers fuel accordingly. If the fuel is gaseous, a gas pump is connected to the fuel delivery pipe 31; if the fuel is liquid, a pulse pump that sprays water mist or a liquid fuel vaporization system is connected to the fuel delivery pipe 31. The liquid fuel vaporization system includes an oil pump and a vaporizer). The inner liner 11 is equipped with an igniter corresponding to the inlet of the fuel delivery pipe 31. After the fuel is output from the inlet of the fuel delivery pipe 31, the igniter performs the corresponding ignition operation. The combustion chamber C13 is connected to a flue gas heat exchange coil 14 with its exhaust pipe located outside the cooking chamber 15. The flue gas heat exchange coil 14 is connected and communicates with the combustion chamber C13. The high-temperature flue gas from the combustion chamber C13 enters the flue gas heat exchange coil 14. The flue gas heat exchange coil 14 is placed inside the cooking chamber 15 to perform heat exchange between the high-temperature flue gas and water. The exhaust pipe at the end of the flue gas heat exchange coil 14 is located outside the cooking chamber 15.
[0043] In some embodiments, such as Figure 3 , Figure 5 As shown, a blower box 2 is connected to the bottom of the air box 1. The bottom of the blower box 2 is an air inlet filter plate 21 (the air inlet filter plate 21 has multiple filter holes, serving as the air inlet area of the blower box 2). Inside the blower box 2, a pulse pump 3 (which can be used for both liquid and gaseous fuels) is installed and connected to the fuel tank. The pulse pump 3 is connected to the fuel delivery pipe 31 and is used to deliver gaseous fuel from a gas source or liquid fuel oil from an oil tank. Figure 6 As shown, a fan 4 corresponding to the air inlet A16 is also installed inside the fan box 2.
[0044] The combustion chamber C13 of this utility model has a smoke exhaust port; such as Figure 7As shown, a pipe joint A131 is sealed and installed on the exhaust port, and a pipe joint B1511 is sealed and installed through the bottom plate 151. A flue gas heat exchange coil 14 located in the cooking cylinder cavity is sealed and connected between pipe joint A131 and pipe joint B1511. The flue gas heat exchange coil 14 is evenly coiled inside the cooking cylinder 15. Pipe joint B1511 can be connected to an exhaust pipe, which is used to discharge the heat-exchanged flue gas. Preferably, the flue gas in the exhaust pipe can undergo further heat exchange to further effectively utilize the heat in the flue gas.
[0045] like Figure 10 As shown, the air duct 6 consists of a cylinder A61 and a top plate A62 located at the top of the cylinder A61 and sealed to the top of the cylinder A61. The bottom of the cylinder A61 has an air inlet that communicates with the air inlet chamber. The inner cavity of the cylinder A61 is an air collecting chamber. All air slots are distributed circumferentially along the surface of the cylinder wall of the cylinder A61.
[0046] In some embodiments, there are three possible arrangements for all air ducts: All air ducts are in-line ducts. Since all air ducts in the cylinder A61 of the guide duct 6 are in-line ducts, the fan blows air into the inner cavity of the cylinder A61. After passing through all the air ducts (the air ducts act as airflow guides and combs, and the airflow after being guided and combed enters the mixing chamber), a clockwise airflow is formed. The clockwise airflow in the mixing chamber mixes thoroughly with the fuel that enters successively through the fuel inlet 311, and then is evenly distributed throughout the mixing chamber. During combustion, the guide duct 6 and the inner liner 11 are both at high temperatures, and the mixing chamber is also a high-temperature environment. If liquid fuel is used, the liquid fuel is sprayed into the mixing chamber through a pulse oil pump (the spray can be in the form of water mist). The liquid fuel vaporizes into gas in the high-temperature environment of the mixing chamber.
[0047] The second option is that all the air ducts are counter-current air ducts. Since all the cylinders A61 of the guide air duct 6 are counter-current air ducts, the fan blows the air into the inner cavity of the cylinder A61. After passing through all the air ducts (the air ducts serve to guide the airflow, and the airflow after being guided enters the mixing chamber), a counter-clockwise airflow is formed. The counter-clockwise airflow in the mixing chamber is fully mixed with the fuel that enters successively through the fuel inlet 311, and then evenly distributed throughout the mixing chamber.
[0048] The third option is to designate some of the wind ducts as downwind ducts and the remaining wind ducts as upwind ducts.
[0049] In the above three schemes, the air outlet is set to be inclined clockwise from the inner wall to the outer wall of the cylinder A61 (so that the air discharged from the air outlet of the cylinder A61 will form a clockwise wind, and then enter the mixing chamber to form a clockwise airflow guidance), and the air outlet is set to be inclined counterclockwise from the inner wall to the outer wall of the cylinder A61 (so that the air discharged from the air outlet of the cylinder A61 will form a counterclockwise wind, and then enter the mixing chamber to form a counterclockwise airflow guidance).
[0050] The further preferred technical solution of the third scheme in this embodiment is as follows: See Figure 10 Of all the air ducts, half are downwind ducts 612, and the other half are upwind ducts 611. Upwind ducts 611 are evenly distributed on one half of the cylinder wall of cylinder A61 (i.e., all upwind ducts 611 constitute downwind duct units and are distributed on one half of the cylinder wall of cylinder A61), and downwind ducts 612 are evenly distributed on the other half of the cylinder wall of cylinder A61 (i.e., all downwind ducts 612 constitute downwind duct units and are distributed on one half of the cylinder wall of cylinder A61). In the actual configuration of this embodiment, the direction in which fuel enters through fuel inlet 311 is the fuel entry direction 3111. Figure 11 As indicated by the arrow, the fuel entering in the fuel inlet direction 3111 is vaporized into gas in a high-temperature environment (if it is a gaseous fuel, vaporization is not required). The fuel inlet 311 is located at the junction of the downwind trough unit and the upwind trough unit. Part of the fuel entering in the fuel inlet direction 3111 moves clockwise under the guidance of the downwind flow of the downwind trough unit and is fully mixed at the same time. The other part moves counterclockwise under the guidance of the upwind flow of the upwind trough unit and is fully mixed at the same time.
[0051] like Figure 12 As shown, the combustion tube A9 consists of a tube body B91 and an annular bottom plate A92 located on the outer side of the bottom of the tube body B91. The annular bottom plate A92 is bolted to the top of the inner liner tube 11 for sealing connection. All flame heat outlets A911 are evenly distributed on the tube wall of the tube body B91.
[0052] like Figure 8 , Figure 10 As shown, a flameout protection detection needle 7 is installed inside the cavity of the guide air duct 6. A needle through hole 63 is opened in the center of the cylinder body A61. The detection needle end of the flameout protection detection needle 7 passes through the needle through hole 63 of the cylinder body A61. The detection needle end of the flameout protection detection needle 7 is placed in the space between the top of the guide air duct 6 and the combustion cylinder A9 to perform flameout temperature detection and flameout emergency protection. When the flameout protection detection needle 7 detects flameout, it immediately shuts down the pulse pump 2 and the fan 4, or restarts the ignition operation through the igniter. The inner wall of the inner liner cylinder 11 is also covered with a wire mesh 8 (a portion of the fuel is burned on the wire mesh 4).
[0053] In some embodiments, the inner liner 11 has a fuel inlet 311, which is connected to a fuel inlet pipe 312, and the fuel inlet pipe 312 is sealed to the fuel delivery pipe 31. The inner liner 11 also has an igniter mounting hole 5 corresponding to the position of the fuel inlet 311, and the igniter is installed in the igniter mounting hole 5. The bottom of the cooking cylinder 15 of the present invention is connected to at least three support legs 18 (the support legs 18 are used to support the cooking cylinder 15). The cooking cylinder 15 is composed of an inner cylinder 152, an outer cylinder 153, and a heat insulation layer disposed between the inner cylinder 152 and the outer cylinder 153. The inner wall of the inner cylinder 152 has an annular protrusion with an annular step 17, on which a steaming rack with mesh is placed. Buns or steamers are placed on the steaming rack. The water in the inner cylinder 2 below the steaming rack is heated to generate high-temperature steam and to steam the buns or other foods. The bottom of the cooking drum 15 is connected to a drain pipe 19, which is used to discharge the water stored in the cooking drum 15.
[0054] In use, taking liquid fuel as an example, the fuel delivery pipe 31 (under the power output of the pulse pump 3) sprays the liquid fuel into a water mist and enters the mixing chamber through the fuel inlet 311. The igniter is used to ignite the water mist liquid fuel. The blower 4 blows air into the air box 1 through the air inlet A16. After the air is collected in the inner cavity of the guide duct 6, it is combed and guided by various air grooves to form the required airflow. The air grooves play a combing role. After being combed by the air grooves, the airflow entering the mixing chamber is in a certain pattern (any of the three types of airflow, this embodiment prefers the third type of air groove design), which enhances the mixing efficiency of fuel and air and achieves more thorough mixing. After being combed by the guide duct 6, the airflow enters the mixing chamber to promote the mixing of fuel and air. The fuel and air mixture is called an air-fuel mixture, which is ignited for the first time in the mixing chamber (the first ignition can be called pre-combustion or...). In the first stage of combustion, the air duct 6, the inner liner 11, and the mixing chamber are all in a high-temperature environment during continuous combustion. If the fuel entering the mixing chamber is liquid fuel oil, it will immediately vaporize upon entry and be transported step by step. The air-fuel mixture enters the combustion chamber A of the combustion tube A9 (which can be called the second stage of combustion), the combustion chamber B of the combustion tube B10 (which can be called the third stage of combustion), and the combustion chamber C of the combustion tube C13 (which can be called the fourth stage of combustion) for combustion step by step, so that the air-fuel mixture is fully mixed and fully combusted (greatly reducing the emission of toxic gases such as carbon monoxide from incomplete combustion, while full combustion makes the fuel thermal efficiency higher).
[0055] During continuous combustion, the high-temperature flame and flue gas from combustion cylinder A9 enter combustion chamber B of combustion cylinder B10 through flame heat outlet A911, then mix and enter combustion chamber C of combustion cylinder C13 through flame heat outlet B101. All air-fuel mixtures are fully combusted. Simultaneously, the combustion flame and high-temperature flue gas are progressively transported and collected within the inner cavity of combustion cylinder C13, fully participating in heat exchange. Combustion cylinder C13 is located inside cooking cylinder 15, enabling efficient heat exchange with the water inside cooking cylinder 15 (water surrounding combustion cylinder C13). Combustion cylinder C13 increases the heat exchange area, promoting heat exchange efficiency. Water inside cooking cylinder 15 evaporates into high-temperature steam, used for steaming food (an annular step 17 is provided inside cooking cylinder 15 for placing food; a perforated steaming rack, such as a steamer basket, is placed on the annular step 17, allowing food to be cooked using high-temperature steam). The high-temperature flue gas after fuel combustion is input into the flue gas heat exchange coil 14. The flue gas heat exchange coil 14 is evenly coiled inside the cooking drum 15. In this way, the high-temperature flue gas in the flue gas heat exchange coil 14 exchanges heat with the water in the cooking drum 15, effectively utilizing the heat energy of the flue gas and improving the heat exchange efficiency.
[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A combustion heating device for cooking, characterized in that: The device includes a bellows, an inner liner, a guide duct connected to the inner liner via a sealed base plate, and a combustion cylinder A sealed at the top of the inner liner. The bellows has an air inlet chamber with an air inlet A communicating with the air inlet chamber. The inner cavity of the guide duct communicates with the air inlet chamber of the bellows. The guide duct has several circumferentially distributed air slots. A mixing chamber is formed between the inner wall of the inner liner and the outer wall of the guide duct. The combustion cylinder A has a combustion chamber A communicating with the mixing chamber. The combustion cylinder A has several uniformly distributed flame heat outlets A. A combustion cylinder C is fitted outside the combustion cylinder A, and the combustion cylinder C has a combustion chamber C inside.
2. The combustion heating device for cooking according to claim 1, characterized in that: The combustion cylinder A is externally fitted with a combustion cylinder B located inside the combustion chamber C of the combustion cylinder C. The combustion cylinder B has a combustion chamber B inside and several flame heat outlets B are opened on the combustion cylinder B. The inner liner of the air box is fitted with a fuel delivery pipe, the pipe opening of which is placed in the mixing chamber. The inner liner is fitted with an igniter corresponding to the pipe opening of the fuel delivery pipe.
3. A cooking system comprising the combustion heating device for cooking as described in claim 2, characterized in that: It also includes a cooking cylinder, the top of which is sealed to the bottom plate of the cooking cylinder, and the combustion cylinder C is sealed to the bottom plate. The combustion cylinder C is located in the cooking cylinder cavity of the cooking cylinder. The combustion cylinder C is connected to a flue gas heat exchange coil coiled inside the cooking cylinder, and the outlet end of the flue gas heat exchange coil passes through the cooking cylinder.
4. The cooking system according to claim 3, characterized in that: The inner cavity of the air guide duct is equipped with a flameout protection detection needle. The air guide duct has a cylinder body A, and a needle through hole is opened in the center of the cylinder body A. The detection end of the flameout protection detection needle passes through the needle through hole of the cylinder body A. The inner wall of the inner lining cylinder is also covered with a wire mesh.
5. A cooking system according to claim 3, characterized in that: The bottom of the air box is connected to a fan box, the bottom of the fan box is an air inlet filter plate, and a pulse pump corresponding to the fuel tank is installed inside the fan box. The pulse pump is connected to the fuel delivery pipe. A fan corresponding to air inlet A is also installed inside the fan box.
6. The cooking system according to claim 3, characterized in that: The combustion cylinder C is sealed and penetrated by a pipe joint A, the bottom plate of the cylinder is sealed and penetrated by a pipe joint B, the inlet end of the flue gas heat exchange coil is sealed and connected to the pipe joint A, and the outlet end of the flue gas heat exchange coil is sealed and connected to the pipe joint B.
7. A cooking system according to claim 3, characterized in that: The air duct is composed of a cylinder A and a top plate A located at the top of the cylinder A and sealed to the top of the cylinder A. The bottom of the cylinder A has an air inlet that communicates with the air inlet chamber. The inner cavity of the cylinder A is an air collecting chamber. All the air grooves are distributed circumferentially along the surface of the cylinder wall of the cylinder A. One half of the cylinder wall of the cylinder A is evenly distributed with counter-wind grooves, and the other half of the cylinder wall of the cylinder A is evenly distributed with forward-wind grooves.
8. A cooking system according to claim 3, characterized in that: The combustion cylinder A consists of a cylinder B and an annular bottom plate A located on the outer side of the bottom of the cylinder B. The annular bottom plate A is bolted to the top of the inner liner cylinder for sealing connection. All flame heat outlets A are evenly distributed on the cylinder wall of the cylinder B. The top height of the inner liner cylinder is higher than the top height of the guide air duct.
9. A cooking system according to claim 3, characterized in that: The inner liner has a fuel inlet, which is connected to a fuel inlet pipe and sealed to the fuel delivery pipe. The inner liner also has an igniter mounting hole corresponding to the fuel inlet position, and the igniter is installed in the igniter mounting hole.
10. A cooking system according to claim 3, characterized in that: The bottom of the cooking cylinder is connected to at least three support legs. The cooking cylinder consists of an inner cylinder, an outer cylinder, and an insulation layer disposed between the inner and outer cylinders. The inner wall of the inner cylinder has an annular protrusion with an annular step, and a steaming grid with mesh is placed on the annular step. The bottom of the cooking cylinder is connected to a drain pipe.