Gas stove

Abstract

The invention relates to the technical field of kitchen appliances, in particular to a gas stove. Comprising at least two gas mixing cavities; the at least two injection pipes are correspondingly communicated with the at least two gas mixing cavities, and injection channels are formed in the injection pipes; and the fan assembly is configured to be arranged in at least one injection channel and used for supplementing air into the corresponding injection channel. The strong turbulent flow effect generated when the draught fan assembly works can conduct secondary disturbance on gas and air which are preliminarily mixed in the injection channel, air mass layering is thoroughly broken, gas molecules and air molecules are fully collided and blended, and the defect that only one-time preliminary mixing can be achieved through gas supplementing of an existing air blower is overcome.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and more particularly to a gas stove. Background Technology

[0002] As a device that mixes fuel with air for combustion, the burner is widely used in many fields such as household gas stoves, commercial cooking appliances, and industrial heating equipment. Its combustion efficiency, pollutant emissions, and operational stability directly affect the performance and environmental protection level of the equipment.

[0003] Existing burners typically consist of a burner head and an ejector tube. The ejector tube utilizes the negative pressure generated during fuel injection to draw in air from the outside, allowing the fuel and air to mix initially within the ejector tube before being sent to the mixing chamber of the burner head. The mixed gas is then ignited at the burner head's flame holes, achieving combustion. This passive ejector method, based on the Venturi effect, is currently the mainstream structure in the industry, as it is relatively simple in structure and has low manufacturing costs.

[0004] However, as users' requirements for burner heat load, thermal efficiency, and low emissions continue to increase, traditional passive ejector burners are gradually revealing significant limitations. On the one hand, the amount of air passively ejected depends entirely on the negative pressure created by the fuel injection velocity. When the burner needs to adjust the heat load (i.e., change the fuel supply), the change in ejector air volume is difficult to match with the change in fuel volume. For example, under high-load conditions, the fuel supply increases significantly, but the amount of passively ejected air often cannot be replenished simultaneously, leading to an imbalance in the air-fuel ratio and incomplete fuel combustion. This not only reduces thermal efficiency but also produces more harmful pollutants such as carbon monoxide and nitrogen oxides. Under low-load conditions, the fuel supply decreases, and the amount of ejector air is relatively excessive. Although this ensures complete combustion, it causes heat loss, which also affects combustion economy.

[0005] To address the issue of insufficient air supply, current technologies typically employ a blower to replenish the mixing chamber. The blower connects to the inlet of the ejector channel via an intake channel, injecting air into the ejector channel. However, this method results in a relatively simple contact and mixing process between the fuel gas and air, achieving only one mixing cycle within the ejector channel, leading to poor mixing uniformity. Because the fuel gas and air are not fully integrated, localized oxygen deficiency or excess air can still occur during subsequent combustion, failing to fundamentally solve the problems of low combustion efficiency and high pollutant emissions. This deficiency is particularly pronounced in burners with multi-chamber structures. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a gas stove.

[0007] This application provides a gas stove, including: The burner assembly includes at least two mixing chambers; At least two ejector tubes are provided, and at least two ejector tubes are connected to at least two mixing chambers respectively, and ejector tubes are provided with ejection channels inside. A fan assembly configured to be disposed within at least one of the ejector channels for supplying air into the corresponding ejector channel.

[0008] The multi-mixing chamber and corresponding ejector pipe structure design of the gas stove in this application lays the foundation for precise gas supply in zones. The scheme of directly configuring the fan assembly in the ejector channel enables the fan assembly to have dual functions of active gas replenishment and enhanced mixing: on the one hand, the fan assembly can actively replenish air into the ejector channel, breaking the dependence of traditional passive ejection on fuel negative pressure and ensuring that the air supply can be flexibly adjusted according to combustion demand; more importantly, the strong turbulence generated by the fan assembly when it is working can agitate the initially mixed gas and air in the ejector channel a second time, completely breaking the gas stratification and allowing gas molecules and air molecules to fully collide and mix, solving the defect that the existing blower can only achieve a preliminary mixing once. This thorough secondary mixing allows for precise control of the air-fuel ratio, preventing localized oxygen deficiency or excess air. This not only significantly improves fuel combustion efficiency and reduces the generation and emission of pollutants such as carbon monoxide and nitrogen oxides, but also results in a more uniform and stable flame state across the combustion zones of the multi-mixing chambers. Simultaneously, each ejector channel can be controlled via an independent fan assembly, effectively addressing the issue of uneven air supply to the multi-mixing chambers, improving heating uniformity. Furthermore, the active air replenishment mode reduces the interference of external air pressure and intake conditions on combustion performance, further ensuring combustion stability and reliability. Additionally, the individually installed fan assembly within each mixing chamber allows for independent speed settings based on the load of the large and small burner caps, providing greater flexibility.

[0009] In some embodiments, the ejector channel includes an intake contraction section, a throat, a mixing section and a diffuser section arranged sequentially along the axial direction, the end of the diffuser section being connected to the burner assembly, and the blower assembly being disposed within the diffuser section.

[0010] The design of placing the fan assembly within the diffuser section is key to achieving performance breakthroughs. On one hand, the airflow velocity is relatively gentle and the pressure gradually increases within the diffuser section, avoiding vibration and noise generated when the fan assembly operates in high-speed airflow areas (such as the throat and mixing section). It also reduces the impact and wear of the airflow on the fan blades, extending the lifespan of the fan assembly and improving operational stability. On the other hand, as the final stage before the mixed gas enters the mixing chamber, the turbulence generated by the fan assembly when supplementing air directly acts on the pre-mixed gas mass, promoting deep secondary mixing of the gas and air, completely breaking up gas mass stratification, and resulting in a more uniform air-fuel ratio distribution. Furthermore, the pressurizing effect of the fan assembly in the diffuser section, combined with the diffuser effect of the channel itself, significantly increases the delivery pressure of the mixed gas, ensuring that each chamber in the multi-mixing-chamber structure receives a sufficient and stable gas-air mixture. This effectively solves the problem of uneven combustion in multi-burner systems, ultimately improving combustion efficiency, reducing pollutant emissions, and further enhancing the reliability and user experience of the gas stove.

[0011] In some embodiments, at least two of the mixing chambers include an inner ring mixing chamber and an outer ring mixing chamber, and the fan assembly is disposed at least within the ejector channel communicating with the outer ring mixing chamber.

[0012] From the perspective of the actual working characteristics of gas stoves, the inner ring mixing chamber typically corresponds to the center flame, primarily functioning with low-load, precise heating. Its air demand is relatively low, and traditional passive injection can generally meet the initial combustion requirements. In contrast, the outer ring mixing chamber corresponds to the outer ring flame, undertaking a large-scale, high-intensity heating task. Its heat load is much higher than the inner ring, resulting in a greater and more stable air demand. This is the area where insufficient air supply and incomplete combustion are most likely to occur under traditional passive injection methods. Therefore, placing the fan assembly at least within the injection channel connected to the outer ring mixing chamber prioritizes ensuring sufficient air supply to the outer ring flame, which has a higher heat load demand. Simultaneously, the fan assembly's turbulence ensures thorough mixing of gas and air, effectively solving problems such as yellow flame, low combustion efficiency, and high pollutant emissions caused by insufficient air in the outer ring flame, significantly improving the mainstream heating performance of the burner.

[0013] In some embodiments, the ejector tube includes an ejector tube body and a cover plate. The side wall of the ejector tube body is provided with an installation port. The fan assembly is configured to be installed into the ejector channel from the installation port. The cover plate is embedded in the installation port and is sealed to the installation port. The cover plate is configured to have its inner wall smoothly connected to the inner wall of the ejector tube body after installation with the installation port.

[0014] The mounting port on the side wall of the ejector tube provides a lateral installation path for the fan assembly. Compared to the traditional installation method that requires axial insertion or disassembly of the ejector tube along the ejector channel, this design does not damage the overall structure of the ejector tube. The fan assembly can be directly embedded into the ejector channel from the mounting port, greatly simplifying the assembly process and reducing the space requirements. It is particularly suitable for scenarios with compact internal burner structures, effectively improving assembly efficiency on the production line and reducing labor costs. In terms of maintenance convenience, this structure exhibits outstanding advantages: when the fan assembly malfunctions and needs repair or replacement, only the cover plate of the sealed connection needs to be removed to remove the fan assembly. There is no need to disassemble the connection between the ejector tube and the burner head assembly, greatly shortening maintenance time and reducing maintenance difficulty. This makes quality inspection and maintenance in the production process and after-sales support for end users more convenient and efficient.

[0015] In some embodiments, the outer surface of the ejector body protrudes outward along the thickness direction of the ejector body at a position corresponding to at least one side wall of the mounting port to form a first mounting portion, and a second mounting portion is provided at a corresponding position on the cover plate, the second mounting portion being configured to be fixedly connected to the first mounting portion.

[0016] From the perspective of connection reliability, the first mounting part, formed by the protrusion on the outer surface of the ejector tube, forms a uniquely matched connection structure with the second mounting part on the cover plate. Compared to fixing directly to the ejector tube wall or the edge of the cover plate, this significantly increases the effective contact area of ​​the connection surface, allowing the fixing force to be distributed more evenly and avoiding loosening caused by local stress concentration. During burner operation, the operation of the fan assembly and airflow will generate certain vibrations. This tightly fitted mounting structure can effectively resist vibration interference, ensuring the long-term stability of the connection between the cover plate and the mounting port, and structurally eliminating safety hazards such as cover plate detachment and gas leakage caused by connection failure. In terms of installation and positioning, the corresponding setting of the first and second mounting parts forms a natural positioning benchmark. When assembling the cover plate, simply aligning the two parts is sufficient to quickly complete the positioning of the cover plate, eliminating the need to repeatedly adjust the relative position of the cover plate and the mounting port, significantly improving assembly efficiency. At the same time, this precise positioning ensures that the sealing surface of the cover plate and the installation port are completely fitted, avoiding uneven sealing gaps caused by cover plate misalignment, further enhancing the sealing performance of the installation port, reducing the risk of leakage of gas and air mixture, and preventing external impurities from entering the injection channel.

[0017] In some embodiments, the outer surface of the ejector tube body protrudes outward to form a boss structure at a position corresponding to at least one side wall of the mounting port. The cover plate includes a cover plate body and a connecting plate extending outward along the side wall of the cover plate body. The cover plate body is embedded in the mounting port and is interference-fitted with the mounting port. The connecting plate is correspondingly disposed to the boss structure, and the inner surface of the connecting plate is sealed and fitted to the top surface of the boss structure.

[0018] This design creates a double-layer sealing barrier: firstly, the interference fit between the cover plate and the mounting port ensures a tight seal through precise matching of structural dimensions, directly blocking the leakage path of the gas-air mixture within the injector channel and avoiding the limitations of traditional clearance fits that rely on seals; secondly, the sealed fit between the inner side of the connecting plate and the top surface of the boss structure forms a second sealing barrier. Even if there is minor wear on the interference fit surface, leakage can be blocked through this sealing surface, while preventing external dust and oil from entering the injector channel and affecting fan operation and airflow mixing. This double-sealing design significantly improves the safety level of the burner, making it particularly suitable for scenarios with stringent sealing requirements, such as household stoves.

[0019] In some embodiments, the cover plate is provided with a wire hole, through which the wire of the fan assembly passes out of the ejector channel, and the wire is sealed to the wire hole.

[0020] The sealed connection design between the wire and the through hole not only meets the power supply requirements but also eliminates the possibility of the gas-air mixture in the ejector channel leaking out through the gap in the through hole. It also prevents external dust, oil, condensate, etc. from entering the ejector channel through the through hole. This avoids the safety hazards caused by gas leakage and prevents impurities from adhering to the fan component blades and affecting their operating efficiency, or from entering the ejector channel and interfering with the mixing effect of gas and air, thus further ensuring the safe operation and stable performance of the burner.

[0021] In some embodiments, the mounting port is disposed on the upper side of the ejector tube body; And / or, the fan assembly is fixedly connected to the cover plate.

[0022] The installation port is located on the upper side of the ejector tube body, providing an optimal operating path for the installation of the fan assembly and cover plate, and utilizing the upper space advantage to achieve rapid assembly. During assembly, the fan assembly and cover plate can be fixedly connected to form a whole, and then assembled onto the ejector tube body. When assembling with the ejector tube body, only the position of the cover plate needs to be positioned to install the fan assembly in the correct position, making the operation simple and convenient.

[0023] In some embodiments, the lower surface of the cover plate is provided with two mounting brackets, and the fan assembly is disposed on the two mounting brackets and fixedly connected to the mounting brackets.

[0024] The installation structure and operational stability of the fan have been further optimized. The two mounting brackets form a "two-point support" structure. Compared with a single support or direct attachment, this symmetrical support provides a more stable installation reference for the fan components, effectively limiting the radial and axial displacement of the fan within the ejector channel. When the burner is operating, the vibration and airflow impact generated by the fan can easily cause the fan to shift position. The two-point support mounting brackets can evenly distribute the vibration force, preventing the fan from tilting or swaying due to uneven force distribution. This ensures that the fan is always in the preset working position within the ejector channel, guaranteeing the stability of the gas injection efficiency and turbulent mixing effect.

[0025] In some embodiments, the cover plate is configured to be smoothly connected to the inner wall of the ejector tube body after installation with the mounting port, and the fan assembly is coaxially arranged with the ejector channel.

[0026] This design avoids dead zones and turbulence caused by protrusions, steps, or other structures within the ejector channel, ensuring smooth airflow along the ejector channel, reducing energy loss during transmission, further improving ejection effect and combustion efficiency, and reducing operating noise caused by airflow turbulence. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the gas stove described in the embodiment of this application; Figure 2 This is a top view of the gas stove described in the embodiment of this application; Figure 3 This is a partial structural schematic diagram of the gas stove described in an embodiment of this application; Figure 4 This is a schematic diagram of the ejector tube described in an embodiment of this application; Figure 5 This is a top view of the ejector tube described in the embodiment of this application; Figure 6 for Figure 5 Sectional view along line AA; Figure 7This is a schematic diagram of the assembly structure of the fan assembly and the ejector tube body described in the embodiments of this application; Figure 8 This is a schematic diagram of the assembly structure of the cover plate and the fan assembly described in an embodiment of this application; Figure 9 This is a front view of the assembly structure of the cover plate and the fan assembly described in the embodiment of this application; Figure 10 This is a schematic diagram of the cover plate described in an embodiment of this application.

[0030] Among them, 1. Burner head assembly; 2. Ejector tube; 2a. First ejector tube; 2b. Second ejector tube; 21. Ejector tube body; 21a. Contraction section; 21b. Throat; 21c. Mixing section; 21d. Diffusion section; 211. Mounting port; 212. First mounting part; 2121. Rectangular section; 2122. First lug; 213. Boss structure; 22. Cover plate; 22a. Cover plate body; 22b. Connecting plate; 221. Second mounting part; 222. Mounting bracket; 223. Wiring hole; 3. Fan assembly; 31. Wires. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0033] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 10 As shown in the figure, this application embodiment provides a gas stove, which includes a base (not shown) and a burner. The base includes a cooktop and a bottom shell. The cooktop typically operates at temperatures between 200℃ and 300℃, therefore, it requires high heat resistance. Specifically, the cooktop can be made of stainless steel, tempered glass, microcrystalline glass, ceramic, or other materials. During use, the cooktop is located above the bottom shell. The cooktop is equipped with a control knob and a mounting opening. The control knob is used to control the ignition of the gas stove and adjust the flame intensity. The burner includes a burner head assembly 1, an injector tube 2, a fan assembly 3, and a gas supply module. A receiving cavity is formed between the cooktop and the bottom shell. The bottom of the burner is fixed in the receiving cavity. The burner includes a burner head assembly 1, an injector tube 2, and a fan assembly 3. The burner head assembly 1 extends out of the base through the mounting port on the cooktop to heat the cooking appliance.

[0035] The burner assembly 1 has at least two mixing chambers inside, and at least two injector tubes 2, with each injector tube 2 corresponding to and connected to one of the at least two mixing chambers. An injector channel is provided inside each injector tube 2. A gas supply module provides gas to the burner. The gas enters the injector tube 2 through a gas inlet, and then reaches the gas outlet of the injector tube 2 and the flame outlet on the burner assembly 1. The burner assembly 1 also includes an ignition device, which ignites the gas at the flame outlet, thereby igniting the gas stove.

[0036] Exemplary examples, in some embodiments of this application, an inner annular mixing chamber and an outer annular mixing chamber are formed within the burner assembly 1, and two ejector tubes 2 are provided, wherein one ejector tube 2 is connected to the inner annular mixing chamber and the other ejector tube 2 is connected to the outer annular mixing chamber. (Refer to...) Figure 5 As shown, the first ejector tube 2a is connected to the inner ring mixing chamber, and the second ejector tube 2b is connected to the outer ring mixing chamber.

[0037] Combustion of natural gas requires oxygen, but air is typically used instead during the operation of a gas stove. When gas passes through the burner, the flowing gas creates negative pressure, drawing surrounding air towards it and providing oxygen for combustion. However, relying solely on air supply at the burner is insufficient for complete combustion. Incomplete combustion not only results in heat loss and reduced combustion efficiency but can also produce polluting gases such as carbon monoxide and nitrogen oxides, causing air pollution.

[0038] Therefore, the fan assembly 3 is configured to be installed in at least one ejector channel to supply air to the corresponding ejector channel. That is, the fan assembly 3 can be installed in one of the ejector channels or in both ejector channels, depending on the need. For example, the fan assembly 3 can be a blower. The fan assembly 3, installed inside the ejector tube 2, not only supplies air to the ejector tube 2 to replenish the air supply for combustion of the gas, but also, the rotation of the fan assembly 3 can turbulentize the airflow within the ejector channel, achieving remixing of the gas and air, which helps to ensure complete combustion of the gas.

[0039] The multi-mixing chamber and corresponding ejector pipe 2 structure design of the gas stove provided in this application lay the foundation for precise gas supply in zones. The scheme of directly configuring the blower assembly 3 in the ejector channel enables the blower assembly 3 to have both active gas replenishment and enhanced mixing functions: on the one hand, the blower assembly 3 can actively replenish air into the ejector channel, breaking the dependence of traditional passive ejection on fuel negative pressure and ensuring that the air supply can be flexibly adjusted according to combustion demand; more importantly, the strong turbulence generated by the blower assembly 3 when working can agitate the initially mixed gas and air in the ejector channel a second time, completely breaking the gas mass stratification, allowing gas molecules and air molecules to fully collide and mix, solving the defect that the existing blower gas replenishment can only achieve a preliminary mixing once. This thorough secondary mixing allows for precise control of the air-fuel ratio, avoiding localized oxygen deficiency or excess air. This not only significantly improves fuel combustion efficiency and reduces the generation and emission of pollutants such as carbon monoxide and nitrogen oxides, but also makes the flame state of each combustion zone corresponding to the multi-mixing chamber more uniform and stable. At the same time, each ejector channel can be controlled by an independent fan component 3, effectively solving the problem of uneven air supply in the multi-mixing chamber, improving heating uniformity, and the active air replenishment mode reduces the interference of external air pressure and air intake conditions on combustion performance, further ensuring combustion stability and reliability.

[0040] In traditional gas stoves, an external blower simultaneously supplies air to multiple mixing chambers. Each mixing chamber requires a different amount of air, but the blower can only provide one speed at a time, making it impossible to match the different needs. In this application, however, a micro-fan assembly 3 is separately configured in each injection channel, which can achieve on-demand air supply through independent speed control.

[0041] In some embodiments of this application, the ejector channel includes an intake contraction section 21a, a throat 21b, a mixing section 21c, and a diffuser section 21d arranged sequentially along the axial direction. The end of the diffuser section 21d is connected to the furnace head assembly 1, and the blower assembly 3 is disposed within the diffuser section 21d.

[0042] The intake contraction section 21a adopts a conical contraction structure with an inlet diameter larger than the outlet diameter. The inlet of intake contraction section 21a is connected to the gas supply module. Gas and air enter the ejector channel from the inlet, with the flow velocity gradually increasing axially, creating a negative pressure adsorption effect. This provides the power basis for the initial mixing of gas and air, while simultaneously preventing turbulence noise during airflow entry. The throat 21b has a cylindrical structure with an inner diameter consistent with the outlet diameter of intake contraction section 21a. As a key section for airflow acceleration, maintaining a constant inner diameter in throat 21b ensures that the airflow reaches its maximum velocity, further enhancing the negative pressure effect and creating a stable airflow environment for subsequent gas injection mixing, reducing uneven mixing caused by airflow disturbance. The mixing section 21c adopts a cylindrical transition structure with an inner diameter consistent with throat 21b. The axial length of mixing section 21c is greater than the length of throat 21b, providing sufficient mixing time for gas and air. This allows the two media to fully diffuse and blend during flow through mixing section 21c, avoiding incomplete combustion due to a short mixing path. The diffuser section 21d adopts a conical diffuser structure, with an inlet diameter consistent with the inner diameter of the mixing section 21c. The diffuser section 21d can effectively reduce airflow resistance, avoid airflow separation, and gradually increase airflow pressure, providing a stable pressure base for the gas to be delivered to the furnace head mixing chamber.

[0043] The fan assembly 3 is fixed inside the diffuser section 21d and positioned near its inlet. This location is within the stable airflow region of the diffuser section 21d, preventing the fan blades from interfering with the airflow mixing process in the mixing section 21c, while ensuring the fan can efficiently guide the airflow into the mixing chamber. The fan assembly 3 uses an axial flow fan with streamlined blades and corrosion-resistant surface treatment to ensure stable operation in high-temperature gas environments.

[0044] The design of placing the fan assembly 3 within the diffuser section 21d is key to achieving performance breakthroughs. Firstly, the relatively gentle airflow velocity and gradually increasing pressure within the diffuser section 21d prevent vibration and noise generated when the fan assembly 3 operates in high-speed airflow areas (such as the throat 21b and mixing section 21c), while also reducing the impact and wear of the airflow on the fan blades, extending the service life of the fan assembly 3, and improving operational stability. Secondly, as the final stage before the mixed gas enters the mixing chamber, the turbulence generated when the fan assembly 3 is replenished with air here can directly... The gas is then applied to the initially mixed gas mass, promoting a deep secondary mixing of the gas and air, completely breaking up the gas mass stratification and making the air-fuel ratio distribution more uniform. In addition, the pressurizing effect of the fan component 3 in the diffuser section 21d is superimposed with the diffuser effect of the channel itself, which can significantly increase the delivery pressure of the mixed gas, ensuring that each chamber in the multi-mixing chamber structure can obtain a sufficient and stable gas-air mixture, effectively solving the problem of uneven combustion in multiple burners. Ultimately, while improving combustion efficiency and reducing pollutant emissions, the reliability and user experience of the gas stove are further enhanced.

[0045] Reference Figure 5 As shown, in some embodiments of this application, the fan assembly 3 is disposed in the ejector channel communicating with the outer ring mixing chamber.

[0046] From the perspective of the actual working characteristics of gas stoves, the inner ring mixing chamber typically corresponds to the center flame, primarily functioning with low-load, precise heating. Its air demand is relatively low, and traditional passive injection can generally meet the initial combustion requirements. In contrast, the outer ring mixing chamber corresponds to the outer ring flame, undertaking a large-scale, high-intensity heating task. Its heat load is much higher than the inner ring, resulting in a greater and more stable air demand. This is the area where insufficient air supply and incomplete combustion are common problems under traditional passive injection methods. Therefore, by placing the fan assembly 3 at least within the injection channel connected to the outer ring mixing chamber, priority can be given to ensuring sufficient air supply to the outer ring flame, which has a higher heat load demand. Simultaneously, the fan assembly 3's turbulence ensures thorough mixing of gas and air, effectively solving problems such as yellowing flames, low combustion efficiency, and high pollutant emissions caused by insufficient air in the outer ring flame, significantly improving the mainstream heating performance of the burner.

[0047] In some embodiments of this application, the ejector tube 2 (e.g., the second ejector tube 2b) provided with the fan assembly 3 includes an ejector tube body 21 and a cover plate 22. The side wall of the ejector tube body 21 is provided with an installation port 211. The fan assembly 3 is configured to be installed into the ejector channel from the installation port 211. The cover plate 22 is embedded in the installation port 211 and is sealed to the installation port 211.

[0048] The mounting port 211 is formed on the side wall of the diffuser section 21d, extending through the side wall of the diffuser section 21d along its thickness. For example, the mounting port 211 is a rectangular opening, with its length extending circumferentially along the diffuser section 21d and its width along the axial direction of the diffuser section 21d. The central axis of the mounting port 211 coincides with the axis of the diffuser section 21d, and its circumferential extension direction is symmetrically distributed on both sides of the axis of the diffuser section 21d, ensuring that the fan assembly 3 is subjected to balanced force after installation and does not deviate from the center of the ejector channel.

[0049] The cover plate 22 is rectangular in shape. It is embedded in the mounting opening 211 and is sealed to the mounting opening 211 by a sealing ring.

[0050] The mounting port 211 on the side wall of the ejector tube body 21 provides a lateral installation path for the blower assembly 3. Compared with the traditional installation method that requires axial insertion or disassembly of the ejector tube 2 along the ejector channel, this design does not require damaging the overall structure of the ejector tube 2. The blower assembly 3 can be directly embedded into the ejector channel from the mounting port 211, greatly simplifying the assembly process and reducing the requirements for assembly space. It is especially suitable for scenarios with compact internal burner structures, effectively improving the assembly efficiency of the production line and reducing labor costs. In terms of maintenance convenience, this structure shows outstanding advantages: when the blower assembly 3 malfunctions and needs to be repaired or replaced, the blower assembly 3 can be removed simply by removing the sealing cover plate 22. There is no need to disassemble the connection between the ejector tube 2 and the burner head assembly 1, which greatly shortens the maintenance time and reduces the maintenance difficulty. Whether it is quality inspection and maintenance in the production process or after-sales support for end users, it is more convenient and efficient.

[0051] Furthermore, a first mounting portion 212 is formed on the outer side of the ejector tube body 21 at a position corresponding to at least one side wall of the mounting port 211, protruding outward along the thickness direction of the ejector tube body 21. A second mounting portion 221 is provided at a corresponding position on the cover plate 22. The second mounting portion 221 is configured to seal and fix with the first mounting portion 212.

[0052] In practice, the first mounting part 212 is arranged along the outer side of the ejector tube body 21, corresponding to the two circumferential sidewalls of the circumferential rectangular mounting port 211 (i.e., the two sidewalls along the length of the mounting port 211, extending circumferentially along the ejector tube 2). The axial sidewalls (the two sidewalls along the width of the mounting port 211) are not provided to avoid affecting the stability of the axial airflow and the installation operation space. The two first mounting parts 212 are symmetrically distributed on both sides of the mounting port 211, flush with the sidewalls of the mounting port 211, ensuring accurate installation positioning.

[0053] The first mounting portion 212 includes a rectangular segment 2121 formed on the outer side of the ejector body 21 and a first lug 2122 formed on the outer side of the rectangular segment 2121. The length direction of the rectangular segment 2121 is arranged along the axial direction of the ejector body 21, and the length is adapted to the width of the mounting port 211. The middle part of the rectangular segment 2121 protrudes outward to form the first lug 2122, and the shape of the first lug 2122 is semi-circular.

[0054] The connection between the first mounting part 212 and the outer surface of the ejector tube body 21 adopts an arc-shaped transition to avoid stress concentration, and at the same time prevent the seals or operators from being scratched during installation, thereby improving the durability of the structure.

[0055] The second mounting portion 221 is formed on the outer surfaces of both ends of the cover plate 22 along its length, and the second mounting portion 221 is flush with the end face of the cover plate 22 along its length. The second mounting portion 221 is a second lug formed on the outer surface of the cover plate 22. When the cover plate 22 is installed at the mounting opening 211, the end faces of both ends of the cover plate 22 along its length are fitted with the circumferential sidewall of the mounting opening 211 and the rectangular segment 2121 of the first mounting portion 212. The second lug is fitted and fixed to the first mounting portion 212.

[0056] The first mounting part 212 is provided with a first fixing hole, and the second mounting part 221 is provided with a second fixing hole. Fasteners such as screws or bolts pass through the first fixing hole and the second fixing hole in sequence to fix the cover plate 22 and the ejector tube body 21 together.

[0057] From the perspective of connection reliability, the first mounting part 212, formed by the protrusion on the outer side of the ejector tube body 21, forms a dedicated connection structure with the second mounting part 221 on the cover plate 22. Compared with the method of directly fixing to the tube wall of the ejector tube 2 or the edge of the cover plate 22, this significantly increases the effective contact area of ​​the connection surface, allowing the fixing force to be transmitted and distributed more evenly, avoiding connection loosening caused by local stress concentration. During the operation of the burner, the operation of the fan assembly 3 and the airflow will generate a certain amount of vibration. This tightly fitted mounting structure can effectively resist vibration interference, ensuring the long-term stability of the connection between the cover plate 22 and the mounting port 211, and structurally eliminating safety hazards such as cover plate 22 falling off and gas leakage caused by connection failure. In terms of installation and positioning, the corresponding setting of the first mounting part 212 and the second mounting part 221 forms a natural positioning benchmark. When assembling the cover plate 22, it is only necessary to align the two to quickly complete the positioning of the cover plate 22, without repeatedly adjusting the relative position of the cover plate 22 and the mounting port 211, which significantly improves assembly efficiency. At the same time, this precise positioning ensures that the sealing surface of the cover plate 22 and the mounting port 211 are completely fitted together, avoiding uneven sealing gaps caused by the offset of the cover plate 22, further enhancing the sealing performance of the mounting port 211, reducing the risk of leakage of the gas-air mixture, and preventing external impurities from entering the ejector channel.

[0058] Furthermore, referring to Figure 3 , Figure 7 and Figure 10 As shown, the outer side of the ejector tube body 21 protrudes outward to form a boss structure 213 at a position corresponding to at least one side wall of the mounting port 211. The cover plate 22 includes a cover plate body 22a and a connecting plate 22b extending outward along the side wall of the cover plate body 22a. The cover plate body 22a is embedded in the mounting port 211 and is interference-fitted with the mounting port 211. The connecting plate 22b is correspondingly provided with the boss structure 213, and the inner side of the connecting plate 22b is sealed and fitted to the top surface of the boss structure 213.

[0059] The boss structure 213 is correspondingly provided on the two axial side walls of the mounting port 211 (i.e., the two side walls of the mounting port 211 in the width direction, extending axially along the ejector tube 2). The inner side of the boss structure 213 is flush with the axial side wall of the mounting port 211. The length direction of the boss structure 213 (the direction of extension along the axial side wall) is consistent with the length direction of the mounting port 211, and both ends of the boss structure 213 in the length direction extend to abut against the first mounting part 212.

[0060] In specific implementation, the protrusion height of the boss structure 213 is less than the protrusion height of the rectangular segment 2121 of the first mounting part 212. After the cover plate 22 is installed, its outer surface is flush with the outer surface of the rectangular segment 2121 of the first mounting part 212. The shape and size of the cover plate body 22a are adapted to the shape and size of the mounting port 211. The cover plate body 22a and the mounting port 211 are interference-fitted. The connecting plate 22b is disposed on both sides of the width direction of the cover plate body 22a (consistent with the axial direction of the ejector tube body 21). The outer surface of the connecting plate 22b is flush with the outer surface of the cover plate body 22a, and the thickness of the connecting plate 22b is less than the thickness of the cover plate body 22a. The difference between the thickness of the connecting plate 22b and the thickness of the cover plate body 22a, the thickness of the side wall of the mounting port 211, and the protrusion height of the boss structure 213 is matched. The end of the connecting plate 22b is flush with the outer surface of the boss structure 213.

[0061] This design creates a double-layer sealing barrier: firstly, the interference fit between the cover plate body 22a and the mounting port 211, through precise matching of structural dimensions, ensures a tight seal, directly blocking the leakage path of the gas-air mixture within the ejector channel and avoiding the limitations of traditional clearance fits that rely on seals; secondly, the sealed fit between the inner side of the connecting plate 22b and the top surface of the boss structure 213 forms a second sealing barrier. Even if there is minor wear on the interference fit surface, leakage can be blocked through this sealing surface, while preventing external dust and oil from entering the ejector channel and affecting fan operation and airflow mixing. This double-sealing design significantly improves the safety level of the burner, and is especially suitable for scenarios with stringent sealing requirements, such as household stoves.

[0062] In some embodiments of this application, the cover plate 22 is provided with a wire hole 223, through which the wire 31 of the fan assembly 3 passes out of the ejector channel, and the wire 31 is sealed to the wire hole 223. In specific implementation, the wire 31 is passed out from the wire hole 223, and then sealed by applying glue inside the wire hole 223.

[0063] The sealed connection design between the wire 31 and the through hole 223 not only meets the power supply requirements but also eliminates the possibility of leakage of the gas-air mixture in the ejector channel through the gap in the through hole 223. It also prevents external dust, oil, condensate, etc. from entering the ejector channel through the through hole 223. This avoids the safety hazards caused by gas leakage and prevents impurities from adhering to the blades of the fan assembly 3 and affecting its operating efficiency, or from entering the ejector channel and interfering with the mixing effect of gas and air, thus further ensuring the safe operation and stable performance of the burner.

[0064] In some embodiments of this application, the mounting port 211 is located on the upper side of the ejector tube body 21; and / or, the fan assembly 3 is fixedly connected to the cover plate 22.

[0065] Specifically, the installation port 211 is located on the upper side of the injector tube body 21 (based on the normal installation and use state of the gas stove, i.e., the side facing the cooking countertop). The circumferential length of the installation port 211 extends along the upper circumferential side of the injector tube body 21, and the axial width is distributed along the vertical direction of the injector tube 2, ensuring ease of operation. Positioning the installation port 211 on the upper side conforms to the operational habits of internal assembly of the gas stove, allowing for the pressing and fixing of the cover plate 22 and the fan assembly 3 without flipping the injector tube 2. During assembly, the fan assembly 3 can be first fixedly connected to the cover plate 22 to form a whole, and then assembled onto the injector tube body 21. When assembling with the injector tube body 21, only the position of the cover plate 22 needs to be positioned to install the fan assembly 3 in the correct position, making the operation simple and convenient. The fan assembly 3 and the cover plate 22 are integrated into one unit. During maintenance, only the screws of the cover plate 22 need to be removed to remove the fan assembly 3 as a whole. There is no need to separately disassemble the connection structure between the fan assembly 3 and the ejector tube 2, which improves maintenance efficiency and avoids damage to the inner wall of the ejector channel during disassembly.

[0066] Two mounting brackets 222 are protruding from the lower surface of the cover plate body 22a. The two mounting brackets 222 are spaced apart along the axial direction of the ejector tube body 21. The fan assembly 3 is located between the two mounting brackets 222 and is fixedly connected to the mounting brackets 222.

[0067] In practice, both mounting brackets 222 protrude from the lower surface of the cover plate body 22a (facing the ejector channel side) and are symmetrically distributed along the axial direction of the ejector tube 2 (consistent with the width direction of the mounting port 211). The center line of the mounting bracket 222 coincides with the axial center line of the cover plate body 22a, ensuring that the fan is subjected to balanced force.

[0068] The two mounting brackets 222 form a two-point support structure. Compared with a single support or direct attachment, this symmetrical support provides a more stable mounting reference for the fan assembly 3, effectively limiting the radial and axial displacement of the fan assembly 3 within the injection channel. When the burner is operating, the vibration and airflow impact generated by the fan assembly 3 can easily cause the fan position to shift. The two-point support mounting brackets 222 can evenly bear and disperse the vibration force, preventing the fan assembly 3 from tilting or swaying due to uneven force distribution. This ensures that the fan assembly 3 is always in the preset working position within the injection channel, guaranteeing the stability of the gas injection efficiency and turbulent mixing effect.

[0069] In some embodiments of this application, the cover plate 22 is configured such that, after installation, the inner wall of the cover plate 22 is smoothly connected to the inner side wall of the ejector tube body 21, and the fan assembly 3 is coaxially arranged with the ejector channel.

[0070] In other words, the cover plate 22 does not affect the original structure of the ejector channel, avoiding dead airflow and turbulence caused by protrusions, steps and other structures in the ejector channel, ensuring smooth airflow along the ejector channel, reducing energy loss of airflow during transmission, further improving ejection effect and combustion efficiency, and reducing operating noise caused by airflow turbulence.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0072] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas stove, characterized in that, include: The burner assembly (1) includes at least two mixing chambers; At least two ejector tubes (2), at least two ejector tubes (2) are connected to at least two mixing chambers, and ejector tubes (2) have ejection channels inside; A fan assembly (3) is configured to be disposed within at least one of the ejector channels to supply air to the corresponding ejector channel.

2. The gas stove according to claim 1, characterized in that, The ejector channel includes an intake contraction section (21a), a throat (21b), a mixing section (21c), and a diffuser section (21d) arranged sequentially along the axial direction. The end of the diffuser section (21d) is connected to the burner assembly (1), and the blower assembly (3) is located inside the diffuser section (21d).

3. The gas stove according to claim 1, characterized in that, At least two of the mixing chambers include an inner ring mixing chamber and an outer ring mixing chamber, and the fan assembly (3) is at least disposed in the ejector channel communicating with the outer ring mixing chamber.

4. The gas stove according to claim 1, characterized in that, At least one of the ejector tubes (2) includes an ejector tube body (21) and a cover plate (22), wherein the side wall of the ejector tube body (21) is provided with an installation port (211), the fan assembly (3) is configured to be installed into the ejector channel from the installation port (211), and the cover plate (22) is embedded in the installation port (211) and is sealed to the installation port (211).

5. The gas stove according to claim 4, characterized in that, The outer side of the ejector tube body (21) protrudes outward along the thickness direction of the ejector tube body (21) at a position corresponding to at least one side wall of the mounting port (211) to form a first mounting part (212). A second mounting part (221) is provided at a corresponding position on the cover plate (22). The second mounting part (221) is configured to seal and fix with the first mounting part (212).

6. The gas stove according to claim 4, characterized in that, The outer side of the ejector tube body (21) protrudes outward to form a boss structure (213) at a position corresponding to at least one side wall of the mounting port (211). The cover plate (22) includes a cover plate body (22a) and a connecting plate (22b) extending outward along the side wall of the cover plate body (22a). The cover plate body (22a) is embedded in the mounting port (211) and is press-fitted with the mounting port (211). The connecting plate (22b) is correspondingly provided with the boss structure (213), and the inner side of the connecting plate (22b) is sealed and fitted with the top surface of the boss structure (213).

7. The gas stove according to claim 4, characterized in that, The cover plate (22) is provided with a wire hole (223), through which the wire (31) of the fan assembly (3) passes out of the ejector channel and is sealed to the wire hole (223).

8. The gas stove according to claim 4, characterized in that, The mounting port (211) is located on the upper side of the ejector tube body (21); And / or, the fan assembly (3) is fixedly connected to the cover plate (22).

9. The gas stove according to claim 4, characterized in that, The lower surface of the cover plate (22) is provided with two mounting brackets (222), and the fan assembly (3) is located between the two mounting brackets (222) and is fixedly connected to the mounting brackets (222).

10. The gas stove according to claim 4, characterized in that, The cover plate (22) is configured to be smoothly connected to the inner wall of the ejector tube body (21) after the installation port (211) is installed, and the fan assembly (3) is coaxially arranged with the ejector channel.

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