Energy-saving gas stove applying rotational flow premixing technology

Abstract

The invention belongs to the technical field of gas stoves, and particularly relates to an energy-saving gas stove applying a rotational flow premixing technology, which comprises a cooking bench body and a rotational flow premixing device, the whole cooking bench body is a square frame and comprises a cooking range, a cooking bench support, a long open fire pipe, a control valve, a double-flameout safety device, a fuel gas inlet valve and a primary premixing fan. The rotational flow premixing device comprises an outer rotational flow device, an inner rotational flow device, a Venturi injection pipe, a gas conveying pipeline and a gas supplementing device. The internal and external double-layer rotational flow premixing device is arranged to form an internal and external double-layer multi-stage premixing structure, so that the mixing degree of air and fuel gas is improved, the combustion efficiency of fuel is improved, the generation of COx, NOx and other gases is reduced, and great significance is achieved for guaranteeing the body health of consumers and protecting the green environment.

Description

Technical Field

[0001] The invention belongs to the technical field of gas stoves, and in particular relates to an energy-saving gas stove using a swirl premixing technology. Background Art

[0002] The burner is a key component of the gas stove combustion system, and its technical level has a significant impact on the overall efficiency of the gas stove. In the field of gas stoves, the air sucked in by the ejector tube for mixing with the gas is usually called primary air, and the air added when the gas is burned is called secondary air. The secondary air during combustion is generally supplied by the air flow around the burner. However, most gas stoves on the market directly inhale the secondary air into the combustion chamber after the air flow, and there is no rectification structure in the drainage, so that the air is not fully mixed with the gas and burns directly. Not only is it difficult to meet the combustion temperature, but the fuel will release COx, NOx and other gases when it is not fully burned, which is not conducive to the physical and mental health of residents and the protection of the green environment.

[0003] In view of the above analysis, the technical problems that urgently need to be solved in the prior art are: most of the gas stoves on the market directly inhale the secondary air into the combustion chamber after the air flow, so that the air is directly burned without being fully mixed with the gas. Not only is the combustion temperature difficult to meet the standard, but the fuel will also release COx, NOx and other gases when it is not burned fully. There is no finishing structure to assist the exhaust of the gas after premixing, which is not conducive to premixing with the gas and is also prone to flashback. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides an energy-saving gas stove using swirl premixing technology.

[0005] The present invention is realized as follows: an energy-saving gas stove using swirl premixing technology. The characteristics are: comprising a stove body, a swirl premixing device;

[0006] The stove body is a square frame as a whole, including a stove head, a stove bracket, a long open flame pipe, a control valve, a double flameout safety device, a gas intake valve, and a primary premixing fan; the inner and outer walls of the stove head and the bracket are made of 304 stainless steel, which is easy to clean; the stove head and the furnace head are made of cast iron material, which is resistant to high temperature and corrosion. The double flameout safety device is located above the gas intake valve, which is used to cut off the gas input in an emergency in the event of a power leakage or gas leakage to prevent gas leakage. One end of the primary premixing fan is connected to the gas pipeline, and the air inlet inhales air, which is used to premix the gas-air and generate primary air.

[0007] The swirl premixing device comprises an external swirl device, an internal swirl device, a venturi ejector, an air pipeline, and an air supply device. The external swirl device comprises an external swirl impeller and an external cover tube. The internal swirl device comprises an internal swirl impeller and an internal cover tube. The internal cover tube is coaxially nested in the external cover tube. The internal swirl impeller is arranged in the internal cover tube. The external swirl impeller is arranged between the external cover tube and the internal cover tube. The blades of the external swirl impeller and the blades of the internal swirl impeller are evenly spaced along the circumferential direction. Each blade has the same tilt angle with the circumferential tangent, and each blade on the inner swirl impeller has the same tilt angle with the circumferential tangent; the swirl direction of the inner swirl impeller is the same as that of the outer swirl impeller; the Venturi ejector tube includes a gradually contracting section and a gradually expanding section, and the gradually expanding section is connected to the outer cover tube; the air supply pipeline is located at the bottom of the swirl premixing device and is connected to the bottom of the outer cover tube; the air supply device is located on the side of the air supply device and is at the same height as the outer swirl impeller. The air supply device includes an air supply fan, a grille, and an oxygen sensor.

[0008] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0009] First, compared with the existing technology, the advantages of the present invention are:

[0010] 1) The present invention is provided with an inner and outer double-layer swirl premixing device to form an inner and outer double-layer multi-stage premixing structure, which improves the mixing degree of air and gas, improves the combustion efficiency of fuel, and reduces the generation of gases such as COx and NOx, which is of great significance to protecting the health of consumers and the green environment.

[0011] 2) The present invention is provided with an inner and outer double-layer swirl premixing device. The mixed gas after secondary premixing in the inner ring can produce a suction effect with the outer ring gas and reflux the gas, so that the gas mixing is more sufficient and the combustion is more complete, which greatly improves the combustion efficiency of the gas stove.

[0012] 3) The present invention provides a venturi tube as the injection structure of the burner, and increases the jet velocity of the fuel gas through the design of the tapered section and the throat, thereby improving the premixing effect and reducing the risk of flashback.

[0013] 4) This device is equipped with an oxygen sensor and an air-fuel ratio control system. The air-fuel ratio is calculated through the oxygen sensor and the opening of the valve, and the speed of the air supply fan is automatically controlled according to the air-fuel ratio to increase the oxygen content in the secondary air.

[0014] Second, the present invention solves the problem of insufficient mixing of gas and air and low combustion efficiency in existing gas stoves. In traditional gas stoves, the mixing of gas and air usually relies on simple mechanical design, which is difficult to achieve sufficient premixing, which will lead to incomplete combustion during the combustion process, low gas utilization efficiency, poor flame stability, and thus affect cooking efficiency and energy consumption. In addition, when facing different cooking needs, traditional designs are difficult to dynamically adjust the ratio of gas to air, which makes it difficult to provide stable and efficient firepower in scenes such as high-temperature stir-frying.

[0015] The present invention significantly improves the mixing effect of gas and air by introducing swirl premixing technology. The swirl premixing device adopts an internal and external swirler design, so that the airflow is fully accelerated before entering the combustion chamber, and the speed and mixing ratio of the airflow are further optimized through the Venturi effect. This design ensures that the gas forms a more uniform mixture with the air before combustion, thereby achieving more efficient combustion, reducing energy waste and harmful emissions caused by incomplete combustion, and improving gas utilization efficiency and flame stability.

[0016] In addition, the present invention realizes dynamic adjustment of the ratio of gas to air through the gas supply device, so that the combustion process can adapt to different cooking needs. Whether it is low-temperature slow stewing or high-temperature stir-frying, the gas stove can achieve the best combustion state by adjusting the airflow in real time. This technological advancement not only improves the efficiency and quality of cooking, but also significantly reduces the consumption of gas, prolongs the service life of the gas stove, and further enhances the economy and practicality of the equipment.

[0017] In general, the present invention has made significant technical progress in the field of gas stoves, overcoming the problems of insufficient mixing, unstable flames, etc. in the prior art. Through precise swirl premixing technology and dynamic air supply system, the combustion efficiency of the gas stove has been significantly improved, and the energy-saving effect and environmental protection performance have also been significantly improved, meeting the needs of modern families and commercial kitchens for efficient, energy-saving and environmentally friendly gas stoves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of a gas stove provided by an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a swirl premixing device provided in an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of an inner cyclone provided in an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of an external cyclone provided in an embodiment of the present invention

[0022] Figure 5is a schematic diagram of an air supply fan provided in an embodiment of the present invention;

[0023] Figure 6 is an overall schematic diagram of a premixing device provided in an embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of an overall cross-section of a premixing device provided in an embodiment of the present invention;

[0025] Figure 8 is a flow diagram of a gas premixing device provided in an embodiment of the present invention;

[0026] Fig. 9 It is a schematic diagram of a gas premixing process provided by an embodiment of the present invention;

[0027] In the figure: 1. stove body; 11. stove head; 12. stove bracket; 13. long-open flame pipe; 14. control valve; 15. double flameout safety device; 16. gas inlet valve; 17. primary premixing fan; 2. swirl premixing device; 21. external swirl device; 22. internal swirl device; 23. Venturi ejector tube; 24. gas pipeline; 25. air supply device; 211. external swirl impeller; 212. external cover tube; 221. internal swirl impeller; 222. internal cover tube; 241. gradually contracting section; 242. gradually expanding section; 251. air supply fan; 252. grille; 253. oxygen sensor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Reference Figures 1 to 8 , an energy-saving gas stove using swirl premixing technology, characterized in that: an energy-saving gas stove using swirl premixing technology. Characteristic: comprising a stove body 1, a swirl premixing device 2;

[0030] The stove body 1 is a square frame as a whole, including a stove head 11, a stove bracket 12, a long open flame pipe 13, a control valve 14, a double flameout safety device 15, a gas intake valve 16, and a primary premixing fan 17; the stove head 11 and the inner and outer walls of the bracket are made of 304 stainless steel, which is easy to clean; the stove head 13 and the furnace head 14 are made of cast iron material, which is resistant to high temperature and corrosion. The double flameout safety device 15 is located above the gas intake valve 16, and is used to cut off the gas input in an emergency in the event of a power leakage or gas leakage to prevent gas leakage. One end of the primary premixing fan 17 is connected to the gas pipeline, and the air inlet inhales air, which is used to premix the gas-air to generate primary air.

[0031] The swirl premixing device 2 includes an external swirl device 21, an internal swirl device 22, a venturi ejector tube 23, an air pipeline 24, and an air supply device 25. The external swirl device 21 includes an external swirl impeller 211 and an external cover tube 212. The internal swirl device 22 includes an internal swirl impeller 221 and an internal cover tube 222. The internal cover tube 222 is coaxially nested in the external cover tube 212. The internal swirl impeller 221 is arranged in the internal cover tube 212. The external swirl impeller 211 is arranged between the external cover tube 212 and the internal cover tube 222. The blades of the external swirl impeller 211 and the blades of the internal swirl impeller 221 are evenly spaced along the circumferential direction. Each blade on the outer swirl impeller 211 has the same tilt angle with the circumferential tangent, and each blade on the inner swirl impeller 221 has the same tilt angle with the circumferential tangent; the swirl direction of the inner swirl impeller 211 is the same as that of the outer swirl impeller 221; the venturi ejector tube 24 includes a tapered section 241 and a gradually expanding section 242, and the gradually expanding section is connected to the outer cover tube 212; the air supply pipeline is located at the bottom of the swirl premixing device 2 and is connected to the bottom of the outer cover tube 212; the air supply device 25 is located on the side and is at the same height as the outer swirl impeller 211, and the air supply device 25 includes an air supply fan 251, a grille 252, and an oxygen sensor 253.

[0032] This energy-saving gas stove that uses swirl premixing technology optimizes the mixing process of gas and air through clever design, thereby improving combustion efficiency and saving energy. Its working principle is as follows:

[0033] First, the gas enters the stove body 1 through the gas inlet valve 16 and is pre-mixed with air by the primary pre-mixing fan 17. The primary pre-mixing fan 17 sucks in air and mixes it with the gas to form primary air. The primary mixed gas generated in this process enters the swirl pre-mixing device 2 to further improve the mixing effect. The purpose of the primary pre-mixing is to ensure the preliminary mixing of the gas and air, laying the foundation for subsequent efficient combustion.

[0034] Next, the primary mixed gas enters the inner and outer cyclone parts of the cyclone premixing device 2 through the gas pipeline 24. In the inner and outer cyclones, the inner cyclone impeller 221 and the outer cyclone impeller 211 respectively rotate and accelerate the airflow. The inner cyclone and the outer cyclone are coaxially nested, and the blades of the impellers are evenly arranged, and a strong rotational motion is generated through the circumferential tangent inclination angle. The swirl directions of the inner and outer cyclone impellers are the same, which further enhances the rotation force of the airflow and enables the gas to form a more delicate vortex structure during the swirl process. This swirl technology can effectively improve the mixing uniformity of gas and air and promote full combustion.

[0035] Then, the mixed gas after the swirl enters the venturi ejector 24. The venturi ejector 24 includes a gradually contracting section 241 and a gradually expanding section 242. When the airflow passes through the gradually contracting section, the speed increases and the pressure decreases, and the air provided by the air supply device 25 is further inhaled to enhance the fluidity and mixing effect of the mixed gas. The design of the venturi ejector utilizes the Venturi effect in fluid dynamics, and automatically adjusts the gas flow rate through the pressure difference to ensure that the gas flow entering the combustion chamber is stable and the combustion is sufficient.

[0036] Finally, the air supply device 25 supplies fresh air to the swirl impeller through the air supply fan 251 on the side, and the grille 252 and the oxygen sensor 253 are responsible for monitoring the air flow and oxygen concentration to ensure the optimal state of gas mixing. The air supply device plays a vital role in the air flow link, allowing the ratio of gas to air to be dynamically adjusted to adapt to different combustion requirements and achieve high efficiency and energy saving. After being accelerated and mixed by the multi-stage swirl and venturi tube, the gas mixture finally enters the stove head 11, where it is fully burned to produce an efficient and stable flame to meet various cooking needs while greatly reducing energy consumption.

[0037] Working method:

[0038] (1) Turn on the gas delivery switch and rotate the integrated valve. At this time, the turbocharger premixing fan system starts to work. The gas and air enter the volute at the same time and are mixed under the action of the fan to achieve the effect of the first premixing and generate primary air.

[0039] (2) The gas pipeline is divided into two parts, namely, a constant open flame pipeline and a main gas pipeline. The constant open flame pipeline is used for the continuous output of the constant open flame of the stove, thereby achieving the function of auxiliary ignition; the secondary air passes through the gas pipeline to the swirl premixing device under the stove. Under the action of the inner and outer swirl devices, the primary air is mixed in stages and regions. The mixed gas after the secondary premixing in the inner ring can produce a suction effect with the gas in the outer ring, and the reflux gas makes the gas mixing more complete, achieving the effect of secondary premixing. At the same time, the air-fuel ratio is calculated through the oxygen sensor and the opening of the valve, and the speed of the air supply fan is automatically controlled according to the air-fuel ratio to prevent incomplete combustion caused by insufficient oxygen;

[0040] (3) The secondary premixed gas passes through the Venturi ejector, and the low-pressure area at the throat is used to absorb the gas in the upstream tapered section, thereby increasing the jet velocity of the gas, thereby improving the premixing effect and reducing the risk of flashback.

[0041] The detailed working principle provided by the embodiment of the present invention.

[0042] 1. Initial premixing of gas and air:

[0043] The gas enters the stove body 1 through the gas inlet valve 16, and the primary premixing fan 17 sucks in external air through its air inlet, premixes the air and the gas for the first time, and generates primary air. This primary premixing process can effectively increase the contact area between air and gas, thereby improving the combustion efficiency and providing a more stable gas-air mixture for subsequent swirl premixing.

[0044] 2.Structure and function of cyclone premixing device:

[0045] The swirl premixing device 2 is a core component of the energy-saving gas stove, and includes an outer swirl device 21, an inner swirl device 22, a venturi ejector 23, a gas pipeline 24, and an air supply device 25. The device introduces primary air into the swirl premixing device, so that the air and the gas generate secondary swirl premixing between the outer swirl impeller 211 and the inner swirl impeller 221. The outer swirl impeller 211 is located between the outer cover tube 212 and the inner cover tube 222, and the inner swirl impeller 221 is arranged inside the inner cover tube 222, and the two are coaxially nested to form a coaxial swirl premixing system.

[0046] 3. The function of swirl impeller:

[0047] The inner swirl impeller 221 and the outer swirl impeller 211 in the swirl premixing device 2 are evenly distributed along the circumference, and the inclination angles between the blades and the circumferential tangent are designed to be the same. This design allows the gas-air mixture to first be accelerated by the outer swirl impeller 211 when entering the swirl premixing device to form a stable external swirl, and then further accelerated and disturbed by the inner swirl impeller 221 to form a more uniform airflow. This double-layer swirl structure enhances the full mixing of gas and air, making combustion more complete and efficient.

[0048] 4. Function of Venturi ejector:

[0049] The design of the venturi ejector 23 with its tapered section 241 and the gradually expanding section 242 causes the gas-air mixture to produce pressure changes when passing through the pipe, further enhancing the mixing effect of the airflow. The mixed gas enters the outer cover tube 212 from the gradually expanding section 242, and is further disturbed by the inner swirl impeller 221, ultimately forming an efficient gas-air mixture. This Venturi effect helps to increase the flow velocity of the mixture and form a strong swirl during the mixing process, ensuring maximum contact between the gas and the air.

[0050] 5.Regulating function of the air supply device:

[0051] The air supply device 25 is arranged at the same height as the outer vortex impeller 211, and includes an air supply fan 251, a grille 252 and an oxygen sensor 253. The air supply device can adjust the amount of air entering the outer vortex device 21 through the oxygen sensor 253 according to the real-time detected oxygen concentration by controlling the rotation speed of the air supply fan 251, and further optimize the mixing ratio of the gas and the air. The air supply device ensures that during the combustion process, even if the external environment changes, it can stably provide an appropriate amount of oxygen, so that the combustion is more complete and the exhaust gas emission is reduced.

[0052] 6. Combustion process and energy-saving effect:

[0053] After the mixed gas-air mixture is regulated by multi-stage swirl and air supplement, it enters the stove head 13 through the gas pipeline 24 for combustion. Since the mixed gas has been fully disturbed and mixed in the swirl premixing device 2, the combustion efficiency at the stove head is extremely high, and the gas can be completely burned, thereby achieving energy saving and efficient combustion effects. The design of the stove body 1 is combined with the swirl premixing technology, so that the entire system can still maintain a stable working state at high temperatures, and is easy to clean and maintain, further extending the service life of the stove.

[0054] Embodiment 1:

[0055] This embodiment provides an energy-saving gas stove using swirl premixing technology, which is used for efficient combustion and energy-saving cooking in a home kitchen.

[0056] The structure of the gas stove comprises a stove body, a swirl premixing device, a primary premixing fan, a gas intake valve, and a gas supply device.

[0057] Step 1: Initial premixing of gas and air

[0058] Before use, the gas inlet valve (16) is opened, and the gas enters the primary premixing fan (17) through the gas pipeline. The premixing fan inhales ambient air and mixes it with the gas to generate a mixed gas of primary air and gas.

[0059] Step 2: Working process of swirl premixing device

[0060] The primary premixed gas enters the cyclone premixing device (2) through a gas delivery pipeline (24). The device comprises an external cyclone device (21) and an internal cyclone device (22), wherein the external cyclone impeller (211) is arranged in an external cover tube (212), and the internal cyclone impeller (221) is arranged in an internal cover tube (222). The two sets of impellers rotate in the same cyclone direction, so that the gas forms a highly rotating airflow between the external cover tube and the internal cover tube.

[0061] Step 3: Airflow Acceleration and Optimization

[0062] After the mixed gas forms a swirling airflow in the swirl premixing device, it is compressed and accelerated through the Venturi ejector (23) to further enhance the mixing effect of the airflow. At this time, the airflow velocity increases and the pressure decreases. According to the Bernoulli principle, external air further enters the system through the air supplement device (25) and mixes with the swirling gas to ensure full combustion.

[0063] Step 4: Burning Process

[0064] Finally, the premixed and accelerated gas is ejected from the stove head (11) of the stove body for combustion. Since the gas is fully swirled and premixed, the combustion process is more efficient, the flame is stable, and the heat is concentrated, which can effectively improve cooking efficiency and reduce gas consumption.

[0065] Effect: Through the design and operation of the above embodiment, the gas stove achieves the goal of efficient combustion and energy saving, which not only reduces the gas consumption but also improves the cooking efficiency of the kitchen. The energy-saving gas stove has a wide range of application prospects, is particularly suitable for use in family kitchens, and can effectively reduce daily energy expenditures.

[0066] Example 2: Application of household high-efficiency energy-saving gas stove

[0067] In a home kitchen environment, the swirl premixing technology of the present invention is applied to a gas stove for daily cooking. The gas stove is installed on a stove in an ordinary kitchen and is mainly used for home cooking. When a user turns on the gas stove, the gas enters the stove body 1 through the gas inlet valve 16 and is preliminarily premixed with air by a premixing fan 17. The premixed gas and air mixture enters the swirl premixing device 2 and is further mixed by the inner and outer swirlers. Under the action of the venturi ejector 24, the gas is accelerated and mixed again with the air supplemented by the air supplement device 25 to ensure that the mixing ratio of the gas and air reaches the optimal state.

[0068] In actual use, the gas stove has shown significant energy-saving effects. Due to the efficient operation of the swirl premixing device and the venturi ejector, the gas can be fully burned, the flame is stable and the temperature is high, and the cooking speed is significantly accelerated. Users feel the high efficiency and energy-saving effects of the stove in daily use, and the gas consumption is significantly reduced, while reducing exhaust gas emissions and improving the environmental protection level of the kitchen.

[0069] Example 3: Application of large commercial gas stoves in the catering industry

[0070] In large commercial kitchens in the catering industry, the energy-saving gas stove of the present invention is designed as a combustion device that meets the needs of high-intensity use. The stove is equipped with a more powerful swirl premixing device 2 and a venturi ejector 24, which can handle a larger amount of gas and air mixture. Commercial kitchens have high requirements for firepower, especially in high-temperature stir-frying of Chinese food, which requires a strong and stable flame to be provided quickly.

[0071] In this scenario, the gas enters the stove through a large-flow gas inlet valve 16, is preliminarily mixed with a large amount of air by a premixing fan 17, and then enters the swirl premixing device. The swirl effect of the internal and external cyclones ensures that the gas is fully mixed, and the mixed gas enters the stove head 11 for combustion through the acceleration of the venturi ejector. The air supply device 25 dynamically adjusts the air intake according to the combustion demand to ensure that the flame is always in the best combustion state.

[0072] This commercial gas stove demonstrates excellent performance in large catering environments. It not only provides strong and stable firepower to meet high-intensity cooking needs, but also significantly reduces gas consumption and extends the life of the equipment. Since less exhaust gas is generated due to full combustion, the air quality in the kitchen is also improved, meeting the high requirements of commercial kitchens for environmental protection and energy saving.

[0073] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0074] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. An energy-saving gas stove using swirl premixing technology, It is characterized in that It comprises a stove body (1) and a swirl premixing device (2), wherein: The stove body (1) comprises a stove head (11), a stove support (12), a permanent open flame pipe (13), a control valve (14), a double flameout safety device (15), a gas inlet valve (16) and a primary premixing fan (17); The swirl premixing device (2) comprises an outer swirl device (21), an inner swirl device (22), a venturi ejector (23), a gas pipeline (24) and an air supply device (25), wherein the outer swirl device (21) and the inner swirl device (22) are arranged inside the stove body (1) and are used to generate a swirl premixing effect after the gas and air are mixed.

2. The energy-saving gas stove using swirl premixing technology according to claim 1, It is characterized in that The external swirl device (21) comprises an external swirl impeller (211) and an outer cover tube (212); the internal swirl device (22) comprises an internal swirl impeller (221) and an inner cover tube (222); the inner cover tube (222) is coaxially nested in the outer cover tube (212); the external swirl impeller (211) is arranged between the outer cover tube (212) and the inner cover tube (222); and the internal swirl impeller (221) is arranged in the inner cover tube (222).

3. The energy-saving gas stove using swirl premixing technology according to claim 2, It is characterized in that The blades of the outer swirling impeller (211) and the inner swirling impeller (221) are evenly spaced and arranged along the circumferential direction, each blade has the same inclination angle with the circumferential tangent, and the swirling directions of the outer swirling impeller (211) and the inner swirling impeller (221) are the same.

4. The energy-saving gas stove using swirl premixing technology according to claim 1, It is characterized in that The venturi ejector tube (23) comprises a gradually contracting section (241) and a gradually expanding section (242), and the gradually expanding section (242) is connected to the outer cover tube (212) to enhance the mixing effect of the airflow.

5. The energy-saving gas stove using swirl premixing technology according to claim 1, It is characterized in that The air supply device (25) comprises an air supply fan (251), a grille (252) and an oxygen sensor (253). The air supply device (25) is located at the same height as the external vortex impeller (211) and is used to adjust the amount of air entering the external vortex device (211) according to the oxygen concentration.

6. The energy-saving gas stove using swirl premixing technology according to claim 1, It is characterized in that The inner and outer wall surfaces of the stove head (11) and the bracket (12) are made of 304 stainless steel, and the stove head (13) and the furnace head (14) are made of cast iron material to enhance the high temperature resistance and corrosion resistance.

7. A gas premixing method for an energy-saving gas stove using swirl premixing technology, It is characterized in that The following steps are involved: (1) The fuel gas and the air are initially mixed by a primary premixing fan (17) to generate a primary premixed gas; (2) conveying the primary premixed gas to the outer cyclone device (21) and the inner cyclone device (22) in the cyclone premixing device (2); (3) through the rotation of the outer swirl impeller (211) and the inner swirl impeller (221), the primary premixed gas forms a swirl between the outer cover tube (212) and the inner cover tube (222); (4) The effect of the Venturi ejector (23) is utilized to further enhance the air flow mixing effect and achieve efficient gas premixing.

8. A gas stove combustion method based on swirl premixing technology, It is characterized in that The following steps are involved: (1) Air is sucked in through the gas inlet valve (16) and the primary premixing fan (17) and preliminarily mixed with the gas; (2) sending the preliminary mixed gas into the swirl premixing device (2), and through the relative rotation of the outer swirl impeller (211) and the inner swirl impeller (221), a highly rotating airflow is formed, so that the air and the gas are fully mixed; (3) The mixed gas premixed by the swirl is accelerated through the venturi ejector (23) to enhance the stability of the airflow and the combustion efficiency; (4) The premixed gas is introduced into the stove head (11) for combustion, providing a highly efficient and energy-saving combustion effect.

9. A method for controlling gas stove airflow by swirl premixing technology, It is characterized in that The following steps are involved: (1) In the swirl premixing device (2), the ratio of air and gas entering the mixing chamber (301) is controlled by utilizing the synchronous rotation of the outer swirl impeller (211) and the inner swirl impeller (221); (2) dynamically adjusting the amount of air entering the external cyclone device (21) by adjusting the speed of the air supply fan (251) of the air supply device (25) according to the real-time monitored oxygen concentration; (3) The mixed airflow is accelerated by the venturi ejector (23) so that the airflow reaches an optimal combustion state at the outlet of the stove head (11).

10. A method for improving combustion efficiency using swirl premixing technology in an energy-saving gas stove. It is characterized in that The following steps are involved: (1) mixing the fuel gas and primary air in a primary premixing fan (17) to form a primary mixed gas; (2) sending the primary mixed gas into the swirl premixing device (2), and performing secondary mixing through the inner and outer swirl impellers (221, 211) to form swirl gas; (3) further compressing and accelerating the swirling gas through the Venturi ejector (23) to increase the gas flow velocity and combustion efficiency; (4) The swirl gas is introduced into the stove head (11) for combustion, thereby achieving energy-saving and efficient combustion effect.

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