Combustion device and gas stove

Abstract

The application relates to the technical field of cooking ranges, in particular to a combustion device and a gas stove. The combustion device comprises a burner head, a burner assembly with a first mixing cavity and a first fire hole communicated with the first mixing cavity, and a wok frying nozzle assembly comprising a base and a connecting pipe mounted on the base, the connecting pipe penetrating through the burner head and comprising an inlet section, a contraction section, a throat and a diffusion section connected in sequence, the inlet section being sleeved on the base, the base being provided with a gas passage communicated with the connecting pipe, the base being provided with an air supplementing opening upstream of the connecting pipe, and the end of the connecting pipe away from the base extending into the first mixing cavity. When gas flows in the connecting pipe, the flow rate in the contraction section is accelerated, so that the wok frying nozzle assembly can inject more primary air. The gas in the first mixing cavity is not prone to backflow into the connecting pipe through the diffusion section, the flow rate of the gas at the first fire hole is ensured, and the risk of backfire of the combustion device is reduced.

Description

Technical Field

[0001] This application relates to the field of stove technology, and in particular to a combustion device and a gas stove. Background Technology

[0002] To meet user needs, some gas stoves are designed with a high-heat function. When the high-heat function is turned on, the gas stove's heat will increase instantly to meet the user's need for stir-frying.

[0003] Currently, some gas stoves have a burner assembly, burner head, and high-power nozzle assembly. The burner assembly is mounted on the burner head, and the high-power nozzle assembly passes through the burner head with its gas outlet extending into the burner assembly. When the gas stove is in high-power mode, the high-power nozzle assembly supplies a separate gas supply to the burner assembly.

[0004] However, when the gas stove is turned on to the high-heat mode, the combustion device may backfire, posing a safety hazard to the gas stove. Utility Model Content

[0005] Based on this, this application provides a combustion device and a gas stove to solve the problem of backfire that may occur in the combustion device when the gas stove is turned on the high-heat mode in the related technology.

[0006] In a first aspect, embodiments of this application provide a combustion device, comprising:

[0007] Stove head;

[0008] A burner assembly having a first mixing chamber and a first flame port communicating with the first mixing chamber;

[0009] The stir-fry nozzle assembly includes a base and a connecting pipe mounted on the base. The connecting pipe passes through the burner head and includes an inlet section, a constriction section, a throat, and a diffuser section connected in sequence from end to end. The inlet section is fitted onto the base, which has a gas passage communicating with the connecting pipe. An air inlet is provided on the base upstream of the connecting pipe. The end of the connecting pipe away from the base extends into the first mixing chamber.

[0010] Along the direction from the inlet section to the diffuser section, the inner diameter of the contraction section gradually decreases, while the inner diameter of the diffuser section gradually increases.

[0011] In one possible implementation, the connecting tube further includes a straight section, one end of which is connected to the end of the diffuser section away from the throat, and the other end of which extends into the first mixing chamber.

[0012] In one possible implementation, the burner assembly includes a distributor, an inner ring burner cap, and an outer ring burner cap, the inner and outer ring burner caps being mounted on the distributor, the outer ring burner cap having an outer ring cavity surrounding the inner ring burner cap, the inner ring burner cap having a first flame hole, the first flame hole defining a first mixing chamber between itself and the distributor.

[0013] The connecting pipe passes through the distributor setting.

[0014] In one possible implementation, the combustion device further includes a partition installed in the first mixing chamber, the partition being connected to the inner ring burner cap, the partition dividing the first mixing chamber into a first chamber and a second chamber, the first chamber being located above the second chamber, a connecting pipe passing through the partition, and the end of the connecting pipe away from the base communicating with the first chamber.

[0015] In one possible implementation, the separator is a retaining ring, with the outer edge of the retaining ring clamped between the inner ring burner cap and the burner distributor, and the connecting pipe passing through the retaining ring.

[0016] In one possible implementation, the separator is a sleeve that extends into and is threadedly connected to the inner ring flame cap; along the axial direction of the inner ring flame cap, there is a gap between the top of the sleeve and the inner top wall of the inner ring flame cap; a connecting pipe is provided through the sleeve.

[0017] In one possible implementation, a connector is provided on the base, and the inlet section is fitted onto the connector and pressed and riveted to the connector.

[0018] In one possible implementation, the connector is provided with multiple annular grooves, which are arranged at intervals along the axial direction of the connector, and each annular groove is arranged around the axis of the connector.

[0019] The inlet section is provided with multiple inwardly recessed limiting parts, each limiting part protruding from the inner wall of the inlet section. The multiple limiting parts are arranged at intervals along the axial direction of the inlet section, and each limiting part is arranged around the axis of the inlet section.

[0020] Multiple limiting parts are embedded in multiple annular grooves in a one-to-one correspondence.

[0021] In one possible implementation, the connecting pipe is fixed to the burner head by a bracket, the bracket including a mounting part and a clamping part, the mounting part being fixedly connected to the burner head, and the clamping part clamping the throat.

[0022] Secondly, this application provides a gas stove, including a gas valve, a high-heat gas passage, and the aforementioned combustion device, with the two ends of the high-heat gas passage connected to the base of the combustion device and the gas valve, respectively.

[0023] The combustion device and gas stove provided in this application include a burner head, a burner assembly, and a high-heat nozzle assembly. The burner assembly has a first mixing chamber and a first flame port communicating with the first mixing chamber. The high-heat nozzle assembly includes a base and a connecting pipe mounted on the base. The connecting pipe includes an inlet section, a constriction section, a throat, and a diffuser section connected in sequence. The inlet section is fitted onto the base, and the base has a gas passage communicating with the connecting pipe. When the gas stove is turned on for high-heat operation, gas can enter the first mixing chamber of the burner assembly through the gas passage and the connecting pipe, and finally be ejected from the first flame port of the burner assembly, thereby forming an additional flame on the burner assembly. Along the direction from the inlet section to the diffuser section, the inner diameter of the constriction section gradually decreases, and the inner diameter of the diffuser section gradually increases. During the process of gas entering the first mixing chamber through the gas passage and the connecting pipe, primary air can be introduced through the air inlet on the base. When the gas flows in the connecting pipe, the flow velocity inside the constriction section increases, so that the high-heat nozzle assembly can entrain more primary air, reducing the risk of backfire in the combustion device. When the gas flows in the diffusion section, the flow velocity decreases and the static pressure increases. Furthermore, the gas flow resistance in the diffusion section gradually decreases. The diffusion section prevents the gas in the first mixing chamber from flowing back into the connecting pipe, ensuring the flow velocity of the combustion gas at the first burner orifice and further reducing the risk of backfire in the combustion device. Attached Figure Description

[0024] 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, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 Explosion of the first combustion device provided in the embodiments of this application Figure 1 ;

[0026] Figure 2 for Figure 1 Explosion of the combustion device shown Figure 2 ;

[0027] Figure 3 for Figure 1 A cross-sectional view of the combustion device shown;

[0028] Figure 4 for Figure 3 A magnified view of the area indicated by the dashed line;

[0029] Figure 5 This is a schematic diagram of the structure of the stir-fry nozzle assembly provided in the embodiments of this application;

[0030] Figure 6 for Figure 3 A magnified view of the area where the retaining ring is located;

[0031] Figure 7 An exploded view of a second type of combustion device provided in an embodiment of this application;

[0032] Figure 8 for Figure 7 A magnified view of the area where the retaining ring is located;

[0033] Figure 9 Exploded view of a third combustion device provided in the embodiments of this application;

[0034] Figure 10 for Figure 9 A magnified view of the area where the retaining ring is located;

[0035] Figure 11 Exploded view of the fourth combustion device provided in the embodiments of this application;

[0036] Figure 12 for Figure 9 A magnified view of the sleeve location;

[0037] Figure 13 This is a partial structural diagram of a gas stove provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10- Combustion device;

[0040] 100-stove head;

[0041] 200-Burner assembly; 210-Ignition distributor; 220-Inner ring flame cap; 221-First flame port; 230-Outer ring flame cap; 240-First mixing chamber; 241-First chamber; 242-Second chamber; 251-Blocking ring; 252-Sleeve;

[0042] 300-Stir-fry nozzle assembly; 310-Base; 311-Gas passage; 312-Air inlet; 313-Connector; 314-Annular groove; 320-Connecting pipe; 321-Inlet section; 3211-Limiting part; 322-Contraction section; 323-Throat; 324-Diffuser section; 325-Straight section;

[0043] 400 - Bracket; 410 - Mounting part; 420 - Clamping part;

[0044] 20 - Gas valve;

[0045] 30-High-heat gas channel;

[0046] 40 - Conventional fire gas passage. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] The terms “first,” “second,” and “third” (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0051] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0052] In existing technology, gas stoves have a high-heat gas channel between the gas valve and the combustion device. When the high-heat mode is activated, an additional gas supply is provided to the combustion device through this channel. Some gas stoves, to ensure overall combustion efficiency, have a mixing chamber on the combustion device. The gas supplied through the high-heat gas channel can enter this mixing chamber separately, and the combustion device has a burner hole communicating with the mixing chamber. The combustion device has a high-heat nozzle assembly, one end of which is connected to the high-heat gas channel, and the other end is connected to the mixing chamber. An air inlet for supplementing primary air is also provided on the high-heat nozzle assembly. However, the high-heat nozzle assembly is generally connected to the mixing chamber via a connecting pipe of uniform diameter. When the high-heat mode is activated, insufficient primary air and the possibility of gas flowing back into the high-heat nozzle assembly from the mixing chamber can slow the gas flow at the burner hole communicating with the mixing chamber. These factors can lead to backfire in the combustion device when the high-heat mode is activated, posing a safety hazard.

[0053] After repeated consideration and verification, the inventors discovered that by changing the shape of the connecting pipe of the stir-fry nozzle assembly, more primary air could be drawn into the connecting pipe as the gas flows through it, thus ensuring the amount of primary air in the mixing chamber. Simultaneously, the shape of the connecting pipe also prevents gas in the mixing chamber from flowing back into the connecting pipe, thereby maintaining the gas flow velocity at the burner holes connected to the mixing chamber. This reduces the risk of backfire in the combustion device and improves the safety of the gas stove.

[0054] In view of this, the inventors designed a combustion device and gas stove. The device comprises a connecting pipe for a stir-fry nozzle assembly, consisting of an inlet section, a constriction section, a throat, and a diffuser section connected sequentially. The inlet section of the connecting pipe is fitted onto the base of the stir-fry nozzle assembly. An air inlet for primary air intake is located upstream of the base. Along the direction from the inlet section to the diffuser section, the inner diameter of the constriction section gradually decreases, while the inner diameter of the diffuser section gradually increases. The constriction section accelerates the gas flow velocity downstream of the air inlet, allowing the gas flowing in the connecting pipe to draw more primary air into the connecting pipe through the air inlet, thus increasing the amount of primary air in the mixing chamber connected to the connecting pipe. The diffuser section of the connecting pipe prevents gas from easily entering the connecting pipe from the mixing chamber, ensuring the gas flow velocity at the burner orifice connected to the mixing chamber. The shape of the connecting pipe also reduces the risk of backfire in the combustion device.

[0055] The technical solutions of the combustion device and gas stove provided in the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0056] Reference Figures 1 to 6As shown, the combustion device 10 provided in this embodiment includes a burner head 100, a burner assembly 200, and a stir-fry nozzle assembly 300. When the gas stove is turned on with a conventional flame, the burner head 100 can supply the gas required for the conventional flame to the burner assembly 200.

[0057] The burner assembly 200 has a first mixing chamber 240 and a first flame port 221 communicating with the first mixing chamber 240. The gas required for stir-frying can enter the first mixing chamber 240 and be ejected through the first flame port 221 to form an additional flame on the burner assembly 200. There can be multiple first flame ports 221, which can be arranged in an array on the burner assembly 200. Those skilled in the art can set the number and specific location of the first flame ports 221 as needed, and no single limitation is made here. It should be noted that the gas required for conventional burning does not enter the first mixing chamber 240; that is, the gas required for stir-frying and the gas required for conventional burning are independent of each other in the burner assembly 200, ensuring stable combustion of the gas at the corresponding flame port as it passes through.

[0058] The stir-fry nozzle assembly 300 includes a base 310 and a connecting pipe 320 mounted on the base 310, the connecting pipe 320 passing through the burner head 100. The base 310 can be a tubular component, with one end receiving the gas required for stir-frying, and the other end connected to the connecting pipe 320. After passing through the burner head 100, the end of the connecting pipe 320 furthest from the base 310 can communicate with the first mixing chamber 240 of the burner assembly 200.

[0059] The connecting pipe 320 includes an inlet section 321, a constriction section 322, a throat 323, and a diffuser section 324 connected end to end. The inlet section 321 is fitted onto the base 310, which has a gas passage 311 communicating with the connecting pipe 320. For example, the sections of the connecting pipe 320 can be integrally formed, or a metal expansion tube, such as a stainless steel expansion tube, can be used as the connecting pipe 320. The pipe diameter at the inlet section 321 can be uniform, and the inlet section 321 can be fitted onto the end of the base 310. When the base 310 is a tubular component, the inner wall of the base 310 defines the gas passage 311, and the gas required for stir-frying can sequentially enter the first mixing chamber 240 through the gas passage 311 and the connecting pipe 320.

[0060] A base 310 is provided with an air supply port 312 upstream of the connecting pipe 320. The end of the connecting pipe 320 away from the base 310 extends into the first mixing chamber 240. Multiple air supply ports 312 can be arranged at intervals around the axis of the connecting pipe 320. When the gas required for the stir-frying fire flows in the stir-frying nozzle assembly 300, it can draw outside air into the stir-frying nozzle assembly 300 through the air supply port 312. Primary air can be supplied to the gas required for the stir-frying fire through the air supply port 312.

[0061] Along the direction from inlet section 321 to diffuser section 324, the inner diameter of contraction section 322 gradually decreases, while the inner diameter of diffuser section 324 gradually increases. Optionally, both contraction section 322 and diffuser section 324 are conical tube sections. The larger diameter end of contraction section 322 connects to inlet section 321, and the smaller diameter end connects to throat 323; the smaller diameter end of diffuser section 324 connects to throat 323. The throat 323 of connecting pipe 320 can be a straight tube section. It is understood that contraction section 322, throat 323, and diffuser section 324 together define a "Venturi tube," where the gas velocity increases and static pressure decreases as it flows in contraction section 322. Driven by the gas flowing in contraction section 322, outside air is more easily introduced into the stir-fry nozzle assembly 300 through air inlet 312. In another possible implementation, the outer diameter of the connecting pipe 320 can be consistent, and along the direction from the inlet section 321 to the diffuser section 324, the inner diameter of the contraction section 322 gradually decreases, the inner diameter of the diffuser section 324 gradually increases, and the inner diameter of the throat 323 can be consistent.

[0062] When the gas flows in the diffuser section 324, the flow velocity decreases and the static pressure increases. Understandably, when the gas flows from the connecting pipe 320 into the first mixing chamber 240, the resistance decreases in the diffuser section 324. Conversely, when the gas in the first mixing chamber 240 flows into the connecting pipe 320, the resistance increases in the diffuser section 324. That is, the diffuser section 324 of the connecting pipe 320 makes it difficult for the gas in the first mixing chamber 240 to flow back into the connecting pipe 320.

[0063] In the combustion device 10 provided in this embodiment, during the process of gas entering the first mixing chamber 240 via the gas passage 311 and connecting pipe 320, primary air can be introduced through the air inlet 312 on the base 310. When the gas flows in the connecting pipe 320, the flow velocity increases inside the contraction section 322, thereby allowing the stir-fry nozzle assembly 300 to inject more primary air, reducing the risk of backfire in the combustion device 10. When the gas flows in the diffusion section 324, the flow velocity decreases, the static pressure increases, and the gas flow resistance in the diffusion section 324 gradually decreases. The diffusion section 324 prevents the gas in the first mixing chamber 240 from flowing back into the connecting pipe 320, ensuring the flow velocity of the gas at the first flame hole 221, further reducing the risk of backfire in the combustion device 10.

[0064] Furthermore, when the gas and air flow in the connecting pipe 320, the connecting pipe 320 can act as a venturi tube, allowing the gas and air to mix more evenly, resulting in more stable combustion of the gas at the first burner hole 221 and improving combustion efficiency.

[0065] In one embodiment, such as Figures 3-5 As shown, the connecting pipe 320 also includes a straight section 325, one end of which is connected to the end of the diffuser section 324 away from the throat 323, and the other end of the straight section 325 extends into the first mixing chamber 240.

[0066] Understandably, the connecting pipe 320 has a consistent diameter at the straight section 325. The straight section 325 can be integrally formed and connected to the diffuser section 324. The straight section 325 is provided at the end of the diffuser section 324 away from the throat 323. The straight section 325 can extend the length of the connecting pipe 320, ensuring that the end of the connecting pipe 320 away from the base 310 can reliably extend into the first mixing chamber 240. Thus, when the gas stove is turned on with the high-heat flame, the gas can reliably enter the first mixing chamber 240 through the gas passage 311 of the base 310 and the connecting pipe 320.

[0067] In one possible implementation, such as Figure 2 and Figure 3 As shown, the connecting pipe 320 is fixed to the burner head 100 by the bracket 400. The bracket 400 includes an installation part 410 and a clamping part 420. The installation part 410 is fixedly connected to the burner head 100, and the clamping part 420 clamps the throat 323.

[0068] The mounting part 410 and the clamping part 420 can be integrally formed. Optionally, the mounting part 410 can be fixed to the burner head 100 by fasteners. The elastic deformation of the clamping part 420 can reliably clamp the throat 323 of the connecting pipe 320. This prevents the connecting pipe 320 from moving relative to the burner head 100 along its own axial direction, ensuring that the gas can be reliably supplied to the burner assembly 200 through the connecting pipe 320.

[0069] In this structure, since the diameter of the connecting pipe 320 is the same at the position of the throat 323, the clamping part 420 of the bracket 400 can ensure the contact area between the clamping part 420 and the throat 323 when clamping the throat 323, so that the clamping part 420 can reliably fix the connecting pipe 320 when clamping the throat 323.

[0070] In one embodiment, such as Figures 3-5 As shown, a connector 313 is provided on the base 310, and the inlet section 321 is sleeved on the connector 313 and pressed and riveted to the connector 313.

[0071] The connector 313 has a cylindrical structure, and the outlet of the gas passage 311 extends to the end of the connector 313 away from the main body of the base 310. Those skilled in the art will understand that the inlet section 321 can be plastically deformed by pressing and riveting it. In one possible implementation, the outer periphery of the connector 313 has a protrusion. After the inlet section 321 is fitted onto the connector 313, it is pressed and riveted, causing the position of the inlet section 321 corresponding to the protrusion to protrude away from the connector 313. This protrusion forms a groove on the inner wall of the inlet section 321, and the protrusion on the connector 313 is embedded in the groove. In another possible implementation, the outer periphery of the connector 313 has a groove. After the inlet section 321 is fitted onto the connector 313, it is pressed and riveted, causing the position of the inlet section 321 corresponding to the groove to form a protrusion embedded in the groove. The inlet section 321 of the connecting pipe 320 is reliably fixed to the connector 313 through the cooperation between the protrusion and the groove.

[0072] The above settings can ensure a reliable connection between the connecting pipe 320 and the base 310, and prevent the connecting pipe 320 from falling off the base 310.

[0073] In a specific embodiment, such as Figures 3-5 As shown, the connector 313 is provided with a plurality of annular grooves 314, which are arranged at intervals along the axial direction of the connector 313, and each annular groove 314 is arranged around the axis of the connector 313. Optionally, the plurality of annular grooves 314 can be arranged at equal intervals on the connector 313. Each annular groove 314 can be integrally formed on the connector 313.

[0074] The inlet section 321 is provided with a plurality of inwardly recessed limiting parts 3211, each limiting part 3211 protruding from the inner wall of the inlet section 321. The plurality of limiting parts 3211 are arranged at intervals along the axial direction of the inlet section 321, and each limiting part 3211 is arranged around the axis of the inlet section 321. The plurality of limiting parts 3211 are embedded one-to-one into a plurality of annular grooves 314.

[0075] Understandably, each limiting part 3211 is recessed on the outer wall of the inlet section 321 relative to the main body of the inlet section 321, and each limiting part 3211 protrudes on the inner wall of the inlet section 321 relative to the main body of the inlet section 321. After the inlet section 321 is fitted onto the connector 313, multiple limiting parts 3211 can be formed on the inlet section 321 by riveting. Understandably, the number of limiting parts 3211 is the same as the number of annular grooves 314 on the connector 313. The positions of the multiple limiting parts 3211 are directly opposite the multiple annular grooves 314, and the height of each limiting part 3211 is the same as the depth of the corresponding annular groove 314. In this embodiment, the specific number of limiting parts 3211 and annular grooves 314 is not limited, and those skilled in the art can set them as needed.

[0076] In one embodiment, such as Figures 1-3 and Figure 6 As shown, the burner assembly 200 includes a flame spreader 210, an inner ring flame cap 220, and an outer ring flame cap 230. The inner ring flame cap 220 and the outer ring flame cap 230 are mounted on the flame spreader 210, and the outer ring flame cap 230 has an outer ring cavity surrounding the inner ring flame cap 220.

[0077] The gas required for the conventional flame is supplied to the inner ring burner 220 and the outer ring burner 230 via the burner head 100 and the flame distributor 210, respectively. The inner ring burner 220 may have an inner ring cavity and an inner ring flame hole communicating with the inner ring cavity, while the outer ring burner 230 may have an outer ring flame hole communicating with the outer ring cavity. When the gas stove is turned on with the conventional flame, gas is ejected from the inner ring flame hole and the outer ring flame hole, thereby forming flames on the inner ring burner 220 and the outer ring burner 230, respectively.

[0078] The inner ring flame cap 220 has a first flame hole 221, which defines a first mixing chamber 240 between the first flame hole 221 and the flame divider 210. A connecting pipe 320 passes through the flame divider 210.

[0079] Schematic illustration: The inner ring burner cap 220 has a cavity with an opening facing the burner distributor 210 in its center. The cavity and the center of the burner distributor 210 define a first mixing chamber 240. The first flame hole 221 can be arranged in the area corresponding to the cavity on the top of the inner ring burner cap 220. When the gas stove is turned on to high heat, the inner ring burner cap 220 generates an additional flame at the location of the first flame hole 221. After the connecting pipe 320 passes through the burner distributor 210, its end away from the base 310 can extend into the middle area of ​​the top of the inner ring burner cap 220 between the burner distributor 210 and the inner ring burner cap 220.

[0080] With the above configuration, a first mixing chamber 240 is defined between the inner ring burner cap 220 and the flame distributor 210. The first flame hole 221 is positioned on the inner ring burner cap 220, ensuring that when the gas stove is in high-heat mode, the additional flame generated by the burner assembly 200 is located in the center of the burner assembly 200. Compared to adding an additional gas passage to the outer ring burner cap 230 to enhance firepower, this avoids extending the outer ring flame, and the additional flame generated by the burner assembly 200 is located in the center, ensuring overall gas combustion efficiency and effectively improving the firepower intensity of the bottom heating area as desired by the user.

[0081] In a specific embodiment, such as Figure 1 , Figure 3 , Figures 6-12 As shown, the combustion device 10 also includes a partition installed within the first mixing chamber 240. The partition is connected to the inner ring flame cap 220 and divides the first mixing chamber 240 into a first chamber 241 and a second chamber 242. The first chamber 241 is located above the second chamber 242. The partition is axially positioned in the middle of the first mixing chamber 240 along the inner ring flame cap 220. The portion of the first mixing chamber 240 above the partition is the first chamber 241, and the portion below the partition is the second chamber 242. A first flame hole 221 on the inner ring flame cap 220 communicates with the first chamber 241.

[0082] The connecting pipe 320 passes through the partition, and the end of the connecting pipe 320 away from the base 310 communicates with the first chamber 241. Schematic, a hole is provided in the middle of the partition, and the end of the connecting pipe 320 away from the base 310 can pass through the hole.

[0083] By providing a separator within the first mixing chamber 240, dividing the first mixing chamber 240 into a first chamber 241 and a second chamber 242, the volume of the gas and air required for stir-frying is reduced in the mixing area of ​​the burner assembly 200, thereby reducing the risk of backfire in the combustion device 10.

[0084] In one possible implementation, such as Figure 1 , Figure 3 and Figures 6-10 As shown, the separator is a retaining ring 251. The outer edge of the retaining ring 251 is clamped between the inner ring flame cap 220 and the flame distributor 210. The connecting pipe 320 passes through the retaining ring 251.

[0085] By clamping the retaining ring 251 between the inner ring flame cap 220 and the flame distributor 210, the retaining ring 251 can be reliably fixed at the opening position of the cavity of the inner ring flame cap 220. For example... Figure 1 , Figure 3 and Figure 6As shown, the retaining ring 251 can be an annular plate structure. The end of the connecting tube 320 away from the base 310 can pass through the hole in the middle of the retaining ring 251, thus separating the first mixing chamber 240 through this annular plate structure. Figure 7 and Figure 8 As shown, the baffle ring 251 can be provided with a downwardly extending cylindrical portion in the middle. The end of the connecting pipe 320 away from the base 310 can pass through the cylindrical portion. The baffle ring 251 can not only separate the first mixing chamber 240, but the cylindrical portion of the baffle ring 251 can also play a guiding role, guiding the liquid flowing down from the flame holes on the inner ring burner cap 220 into the burner assembly 200, reducing the risk of the stir-fry nozzle assembly 300 being blocked. Figure 9 and Figure 10 As shown, the baffle ring 251 can also be provided with an annular groove recessed towards the burner 210, which surrounds the axis of the baffle ring 251. The end of the connecting pipe 320 away from the base 310 can extend from the baffle ring 251, and this end is higher than the top surface of the baffle ring 251. While separating the first mixing chamber 240, the annular groove of the baffle ring 251 can also receive liquid flowing from the flame holes on the inner ring burner cap 220, allowing the liquid to preferentially deposit inside the baffle ring 251 and dry its moisture through combustion, reducing the risk of corrosion caused by direct flow into the burner assembly 200. When a large amount of liquid flows into the annular groove, a significant amount can still overflow into the burner assembly 200 without clogging the stir-fry nozzle assembly 300 because the end of the connecting pipe 320 away from the base 310 is higher than the baffle ring 251.

[0086] With the above configuration, the inner ring burner cap 220 and the flame distributor 210 can reliably fix the baffle ring 251, allowing the baffle ring 251 to reliably separate the first mixing chamber 240 and reliably reduce the risk of backfire in the combustion device 10. When the end of the connecting pipe 320 away from the base 310 is higher than the baffle ring 251, it can also prevent the stir-fry nozzle assembly 300 from being blocked, ensuring that the stir-fry nozzle assembly 300 can reliably supply gas to the burner assembly 200.

[0087] In another possible implementation, such as Figure 11 and Figure 12 As shown, the separator is a sleeve 252, which extends into the inner ring flame cap 220 and is threadedly connected to the inner ring flame cap 220. Along the axial direction of the inner ring flame cap 220, there is a gap between the top end of the sleeve 252 and the inner top wall of the inner ring flame cap 220. A connecting pipe 320 is disposed through the sleeve 252.

[0088] Specifically, the inner ring flame cap 220 has internal threads on its side wall, and the sleeve 252 has external threads on its outer side wall. The sleeve 252 extends into the inner ring flame cap 220 within the cavity and is threadedly connected to the side wall of the cavity. The gap between the top end of the sleeve 252 and the inner top wall of the inner ring flame cap 220 defines a first chamber 241. Optionally, the bottom end of the sleeve 252 also has a gap with the flame distributor 210, which defines a second chamber 242. The end of the connecting pipe 320 away from the base 310 can pass through the sleeve 252.

[0089] In this structure, the sleeve 252 can be reliably fixed to the inner ring burner cap 220 via a threaded connection. The sleeve 252 can reliably separate the first mixing chamber 240 to reliably reduce the risk of backfire in the combustion device 10.

[0090] This application also provides a gas stove, such as Figure 13 As shown, the gas stove includes a gas valve 20, a high-heat gas passage 30, and the aforementioned combustion device 10. The two ends of the high-heat gas passage 30 are connected to the base 310 of the combustion device 10 and the gas valve 20, respectively. The gas supplied by the high-heat gas stove can be delivered to the combustion device 10 via the gas valve 20 and the high-heat gas passage 30.

[0091] Figure 13 As shown, the gas stove also includes a conventional flame gas passage 40 connecting the gas valve 20 and the combustion device 10. The gas required for the conventional flame of the gas stove can be supplied to the combustion device 10 via the gas valve 20 and the conventional flame gas passage 40.

[0092] The gas stove provided in this application, due to the use of the aforementioned combustion device 10, is less prone to backfire when the gas stove is turned on for stir-frying, thus ensuring high safety.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A combustion device, characterized in that, include: Stove head; A burner assembly having a first mixing chamber and a first flame port communicating with the first mixing chamber; A stir-fry nozzle assembly includes a base and a connecting pipe mounted on the base. The connecting pipe passes through the burner head and includes an inlet section, a constriction section, a throat, and a diffuser section connected in sequence. The inlet section is sleeved on the base. The base has a gas passage communicating with the connecting pipe. An air inlet is provided on the base upstream of the connecting pipe. The end of the connecting pipe away from the base extends into the first mixing chamber. In the direction from the inlet section to the diffuser section, the inner diameter of the contraction section gradually decreases, while the inner diameter of the diffuser section gradually increases.

2. The combustion device according to claim 1, characterized in that, The connecting tube also includes a straight section, one end of which is connected to the end of the diffuser section away from the throat, and the other end of which extends into the first mixing chamber.

3. The combustion device according to claim 1, characterized in that, The burner assembly includes a flame distributor, an inner ring flame cap, and an outer ring flame cap. The inner ring flame cap and the outer ring flame cap are mounted on the flame distributor. The outer ring flame cap has an outer ring cavity surrounding the inner ring flame cap. The inner ring flame cap has a first flame hole. The first flame hole and the flame distributor define a first mixing chamber. The connecting pipe passes through the fire distributor.

4. The combustion device according to claim 3, characterized in that, The combustion device further includes a partition installed in the first mixing chamber. The partition is connected to the inner ring flame cap. The partition divides the first mixing chamber into a first chamber and a second chamber. The first chamber is located above the second chamber. The connecting pipe passes through the partition, and one end of the connecting pipe away from the base communicates with the first chamber.

5. The combustion device according to claim 4, characterized in that, The separator is a retaining ring, the outer edge of which is clamped between the inner ring flame cap and the flame distributor, and the connecting pipe passes through the retaining ring.

6. The combustion device according to claim 4, characterized in that, The separator is a sleeve that extends into the inner ring flame cap and is threadedly connected to the inner ring flame cap; along the axial direction of the inner ring flame cap, there is a gap between the top end of the sleeve and the inner top wall of the inner ring flame cap; the connecting pipe passes through the sleeve.

7. The combustion device according to claim 1, characterized in that, The base is provided with a connector, and the inlet section is sleeved on the connector and pressed and riveted to the connector.

8. The combustion device according to claim 7, characterized in that, The connector is provided with a plurality of annular grooves, which are arranged at intervals along the axial direction of the connector and are arranged around the axis of the connector. The inlet section is provided with a plurality of inwardly recessed limiting parts, each of the limiting parts protruding from the inner wall of the inlet section, the plurality of limiting parts being arranged at intervals along the axial direction of the inlet section, and each of the limiting parts being arranged around the axis of the inlet section. Each of the aforementioned limiting parts is embedded in one of the aforementioned annular grooves.

9. The combustion device according to claim 1, characterized in that, The connecting pipe is fixed to the burner head by a bracket. The bracket includes an installation part and a clamping part. The installation part is fixedly connected to the burner head, and the clamping part clamps the throat.

10. A gas stove, characterized in that, It includes a gas valve, a high-heat gas passage, and a combustion device as described in any one of claims 1-9, wherein the two ends of the high-heat gas passage are respectively connected to the base of the combustion device and the gas valve.

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