Combustor and gas stove

Abstract

The invention relates to the technical field of kitchen utensils, in particular to a burner and a gas stove. The burner comprises a gas distribution seat, a gas distribution pipe and a gas distribution pipe, the inner ring fire cover is mounted on the gas distribution seat, the inner ring fire cover is provided with an inner ring cavity communicated with the central gas inlet channel, the side wall of the inner ring fire cover is provided with an ignition hole and a fire retaining hole which are respectively communicated with the inner ring cavity, and the ignition hole and the fire retaining hole are distributed along the circumferential direction of the inner ring fire cover; wherein a brim is arranged on the side wall of the inner ring fire cover, the fire retaining hole is located below the brim, a flow blocking part is arranged below the fire retaining hole, the brim and the flow blocking part protrude out of the side wall of the inner ring fire cover, and the flow blocking part is configured to be arranged opposite to the thermocouple. Under the combined action of the cap brim and the flow blocking part, flames at the positions of the fire keeping holes between the cap brim and the flow blocking part can be stably combusted, it is ensured that a thermocouple detects enough thermoelectric force, gas supply is maintained, stable combustion is achieved, and the safety and reliability of the combustor are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a burner and a gas stove. Background Art

[0002] The burner is the core component of the gas stove, which includes an inner ring fire cover, an outer ring fire cover and a gas distributor. The inner ring fire cover and the outer ring fire cover are respectively provided with fire holes. The flame shape can be controlled by setting the position and shape of the fire holes on the inner ring fire cover and the outer ring fire cover.

[0003] Currently, the thermocouple of a gas stove is located between the inner and outer ring flame covers. The inner ring flame cover has a flame-keeping hole at the location corresponding to the thermocouple. This thermocouple detects the presence of a flame at the flame-keeping hole, preventing gas leakage after the burner accidentally goes out, potentially causing poisoning or explosion.

[0004] However, the flame at the flame-keeping hole is prone to drift, which affects the accuracy of thermocouple detection and reduces the safety and reliability of the burner. Summary of the Invention

[0005] Based on this, the present application provides a burner and a gas stove to solve the problem in the related art that the flame at the fire hole is prone to drift, affecting the accuracy of thermocouple detection.

[0006] In a first aspect, an embodiment of the present application provides a burner, comprising:

[0007] The air distributor has a central air inlet channel;

[0008] An inner ring fire cover is mounted on the gas distributor seat. The inner ring fire cover has an inner ring cavity connected to the central air inlet channel. An ignition hole and a flame preservation hole are respectively connected to the inner ring cavity. The ignition hole and the flame preservation hole are arranged along the circumference of the inner ring fire cover. The ignition hole is arranged opposite to the ignition needle, and the flame preservation hole is arranged opposite to the thermocouple.

[0009] Among them, a brim is provided on the side wall of the inner ring fire cover, the fire protection hole is located below the brim, and a flow blocking part is provided below the fire protection hole. The brim and the flow blocking part protrude from the side wall of the inner ring fire cover respectively, and the flow blocking part is configured to be arranged opposite to the thermocouple.

[0010] In a possible implementation, a plurality of inner ring main fire holes are provided on the top of the inner ring fire cover, and the inner ring main fire holes are communicated with the inner ring cavity;

[0011] The side wall of the inner ring fire cover is located above the brim and is provided with an ignition portion, which is connected to the inner ring cavity. In one possible implementation, multiple inner ring main fire holes are arranged in an array around the axis of the inner ring fire cover;

[0012] The ignition portion comprises an ignition groove which is arranged around the axis of the inner ring fire cover, and the ignition groove is communicated with the inner ring cavity.

[0013] In a possible implementation, a plurality of ignition holes are provided on the wall surface of the ignition groove, one end of each ignition hole is connected to the interior of the ignition groove, and the other end of each ignition hole is connected to the inner ring cavity.

[0014] In a possible implementation, a fire protection channel is defined between the brim and the flow-blocking portion, and at least part of the fire protection holes is disposed in the fire protection channel.

[0015] In a possible implementation, the brim includes a main body portion and wing portions sequentially connected along the circumference of the inner ring fire cover, and the main body portion is arc-shaped;

[0016] In the radial direction of the inner ring fire cover, the size of the main body is larger than that of the wing;

[0017] The ignition hole is located below the main body, and the fire protection hole is located below the wing.

[0018] In a possible implementation, the wing portion has an extension portion at one end away from the main body portion;

[0019] The dimension of the extension portion in the radial direction of the inner ring fire cover gradually decreases in a direction away from the wing portion;

[0020] There are multiple fire-keeping holes, which are spaced apart along the circumference of the inner ring fire cover, and the fire-keeping hole on the side away from the ignition hole is located below the extension portion;

[0021] The baffle is located below the wing.

[0022] In a possible implementation, both ends of the baffle portion in the circumferential direction of the inner ring fire cover extend beyond the thermocouple.

[0023] In a possible implementation, the air distributor seat further has an outer ring air distributor channel surrounding the outer side of the central air inlet channel;

[0024] The burner also includes an outer ring fire cover which is arranged on the gas distribution seat and is in communication with the outer ring gas distribution channel;

[0025] An annular mounting portion is provided in the middle of the outer ring fire cover, and the inner ring fire cover is installed on the mounting portion. The mounting portion is arranged around the central air inlet channel, and the baffle portion is a step portion protruding from the outer periphery of the mounting portion.

[0026] In a second aspect, an embodiment of the present application provides a gas stove comprising a burner, a thermocouple, an ignition needle, and the above-mentioned burner;

[0027] The gas distributor of the burner is installed on the burner head, and the thermocouple and ignition needle are both arranged on the burner head. The thermocouple and ignition needle are both located on the outside of the inner ring fire cover of the burner. The ignition needle is arranged opposite to the ignition hole of the inner ring fire cover, and the thermocouple is arranged opposite to the baffle of the burner.

[0028] The burner and gas stove provided in the present application include a gas distributor and an inner ring fire cover. A fire-keeping hole and a brim located above the fire-keeping hole are provided on the side wall of the inner ring fire cover. A baffle is provided below the fire-keeping hole. The brim and the baffle protrude from the side wall of the inner ring fire cover respectively, and the baffle is used to be arranged opposite to the thermocouple. When a flame is burning at the fire-keeping hole position of the inner ring fire cover, the secondary air required for combustion flows upward from the bottom of the burner. The baffle can block part of the gas flowing from bottom to top, preventing the gas flowing from bottom to top from blowing out the flame at the fire-keeping hole position or causing the flame at the fire-keeping hole position to flutter, thereby improving the stability of the flame at the fire-keeping hole position. The brim above the fire-keeping hole can block part of the gas flowing from top to bottom, and can also block the oil-water mixture flowing from top to bottom. The flame at the fire-keeping hole position can dry the oil-water mixture on the brim, reducing the probability of the fire-keeping hole being blocked by the oil-water mixture, and further improving the stability of the flame at the fire-keeping hole position. The brim and baffle block the airflow, reducing the velocity of the airflow around the flame retaining hole between them to a Reynolds number of less than 2000. This transitions the airflow from turbulent and eddy states to laminar flow. The flame at the flame retaining hole burns stably in this laminar flow and is not easily extinguished. This allows the flame at the flame retaining hole to remain stable near the thermocouple, ensuring that the thermocouple detects sufficient thermoelectric potential, maintaining a stable gas supply, and achieving stable combustion, thus guaranteeing the burner's safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 A schematic diagram of the structure of a burner provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 Exploded view of the burner shown;

[0032] Figure 3 A schematic diagram of a portion of the structure of a gas stove provided in an embodiment of the present application;

[0033] Figure 4 for Figure 3 A partial enlarged schematic diagram of the position of the middle dotted box;

[0034] Figure 5 A schematic diagram of the structure of the inner ring fire cover provided in an embodiment of the present application;

[0035] Figure 6 for Figure 5 A bottom view of the inner ring fire cover is shown;

[0036] Figure 7 for Figure 3 A cross-sectional view of the gas stove shown at the location of the thermocouple;

[0037] Figure 8 A schematic diagram of the flame transmission of a burner provided in an embodiment of the present application;

[0038] Figure 9 A cross-sectional view of an inner ring fire cover provided in an embodiment of the present application;

[0039] Figure 10 for Figure 3 A cross-sectional view of the gas stove shown at the ignition needle position;

[0040] Figure 11 A schematic structural diagram of the inner ring fire cover provided in an embodiment of the present application from another perspective;

[0041] Figure 12 A top view of the inner ring fire cover provided in an embodiment of the present application;

[0042] Figure 13 This is a partially enlarged schematic diagram of the inner ring fire cover at the brim position provided in an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 100-air distributor seat; 110-center air inlet channel; 120-outer ring air distributor channel;

[0045] 200 - outer ring fire cover; 210 - mounting portion; 220 - step portion; 230 - outer ring protrusion; 240 - outer ring main fire hole; 250 - screw hole;

[0046] 300-Inner ring fire cover; 310-Inner ring cavity; 320-Ignition hole; 330-Fire protection hole; 340-Brim; 341-Main body; 342-Wing; 343-Extension; 351-Fire starter groove; 352-Fire starter hole; 360-Inner ring main fire hole; 370-Inner ring protrusion; 380-Threaded hole; 390-Fire protection channel;

[0047] 400-burner;

[0048] 500-thermocouple;

[0049] 600-Ignition needle. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0052] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0053] The terms "first", "second" and "third" (if any) in the description and claims of this application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0054] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0055] In the prior art, the burner is provided with a flame-keeping hole on the inner ring fire cover, and the gas stove is provided with a thermocouple at the position corresponding to the flame-keeping hole. When the gas stove is working, the thermocouple can determine whether the burner is burning normally by detecting whether there is a flame at the flame-keeping hole. The thermocouple is connected to the flameout protection device. When the thermocouple does not detect sufficient thermoelectric potential, it determines that the burner has accidentally extinguished. At this time, the flameout protection device cuts off the gas supply to the burner to prevent the continuous leakage of gas after the burner accidentally extinguishes, causing poisoning or explosion. However, the flame-keeping stability of the burner is not good. Under different ambient temperatures, especially in cold or low-temperature environments in winter, the flame is easy to drift, and it is difficult for the thermocouple to stably sense the temperature, which affects the normal operation of the flameout protection device and reduces the safety and reliability of the burner.

[0056] After repeated deliberation and verification, the inventors discovered that if a brim is placed above the fire-keeping hole and a baffle is placed below the fire-keeping hole, the brim can partially block the airflow flowing downward from top to bottom, and the baffle can partially block the airflow flowing upward from bottom to top, allowing the flame at the fire-keeping hole between the brim and the baffle to burn stably. The brim and baffle can also reduce the flow velocity and Reynolds number of the airflow between them, making the airflow between them laminar, further allowing the flame at the fire-keeping hole between the brim and the baffle to burn stably. The gas stove's thermocouple can accurately detect whether there is a flame at the corresponding fire-keeping hole, ensuring the safety and reliability of the burner.

[0057] In light of this, the inventors have designed a burner and gas stove. The burner features a brim on the sidewall of an inner ring flame cover, positioned above a flame retaining hole in the inner ring flame cover. A baffle protruding from the inner ring flame cover's sidewall is positioned below the flame retaining hole. This baffle faces the gas stove's thermocouple. The brim and baffle partially block airflow toward the flame retaining hole facing the thermocouple, reducing the velocity and Reynolds number of the airflow between the brim and baffle. This allows for stable flame combustion at the flame retaining hole between the brim and baffle, improving the reliability of thermocouple detection.

[0058] The technical solutions of the burner and gas stove provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0059] Reference Figures 1 to 7 As shown, the burner provided by the embodiment of the present application includes a gas distributor 100 and an inner ring fire cover 300. The gas distributor 100 has a central air inlet channel 110.

[0060] The inner ring fire cover 300 is mounted on the gas distributor 100. The inner ring fire cover 300 has an inner ring cavity 310 connected to the central air inlet passage 110. The sidewall of the inner ring fire cover 300 is provided with ignition holes 320 and flame preservation holes 330 respectively connected to the inner ring cavity 310. The ignition holes 320 and flame preservation holes 330 are arranged along the circumference of the inner ring fire cover 300. The ignition hole 320 is configured to be opposite to the ignition needle 600, and the flame preservation hole 330 is configured to be opposite to the thermocouple 500. It is understandable that the gas can enter the inner ring cavity 310 of the inner ring fire cover 300 through the central air inlet passage 110 of the gas distributor 100 and be ejected from the ignition holes 320 and flame preservation holes 330, thereby forming flames at the positions of each ignition hole 320 and each flame preservation hole 330.

[0061] Exemplarily, there are multiple ignition holes 320 and multiple flame-keeping holes 330, and multiple flame-keeping holes 330 are located on one side of the multiple ignition holes 320. Some of the ignition holes 320 can be arranged opposite the ignition needle 600, and some of the flame-keeping holes 330 can be arranged opposite the thermocouple 500. The arc generated at the end of the ignition needle 600 can ignite the gas ejected from the ignition hole 320, and the flame at the position of the ignition hole 320 can ignite the gas ejected from the flame-keeping hole 330. The thermocouple 500 can determine whether the burner is burning normally by detecting whether there is a flame at the position of the corresponding flame-keeping hole 330. This embodiment does not limit the specific number of ignition holes 320 and flame-keeping holes 330, and this is not a sole limitation.

[0062] The inner ring fire cover 300 has a brim 340 on its sidewall, and the fire protection hole 330 is located below the brim 340. A flow blocking portion is provided below the fire protection hole 330. The brim 340 and the flow blocking portion protrude from the sidewall of the inner ring fire cover 300, respectively. The flow blocking portion is arranged opposite to the thermocouple 500.

[0063] Schematically, the brim 340 is a sheet-like structure, and the extending direction of the sheet-like structure can be perpendicular to the height direction of the inner ring fire cover 300. The brim 340 can be installed on the side wall of the inner ring fire cover 300 by integral molding or welding. Figure 5 It is shown that, along the height direction of the inner ring fire cover 300 , there is a gap between the brim 340 and the fire protection hole 330 thereunder.

[0064] In one possible implementation, the baffle can be disposed on the inner fire ring cover 300 or on the gas distributor 100, with the side of the baffle away from the side wall of the inner fire ring cover 300 facing the thermocouple 500. Along the height direction of the inner fire ring cover 300, there is a gap between the baffle and the fire protection hole 330 above it.

[0065] It can be understood that since the brim 340 and the baffle both protrude from the side wall of the inner ring fire cover 300, the brim 340 and the baffle can both play a certain blocking role on the airflow.

[0066] In the burner provided in this embodiment, when a flame is burning at the fire-preserving hole 330 of the inner ring fire cover 300, the secondary air required for combustion flows upward from the bottom of the burner. The flow-blocking portion can block a portion of the gas flowing upward from the bottom, preventing the gas flowing upward from the bottom from blowing out the flame at the fire-preserving hole 330 or causing the flame at the fire-preserving hole 330 to flutter, thereby improving the stability of the flame at the fire-preserving hole 330. The brim 340 above the fire-preserving hole 330 can block a portion of the gas flowing downward from the top, and can also block the oil-water mixture flowing downward from the top. The flame at the fire-preserving hole 330 can also dry the oil-water mixture on the brim 340, reducing the probability of the fire-preserving hole 330 being blocked by the oil-water mixture, further improving the stability of the flame at the fire-preserving hole 330.

[0067] It is understood by those skilled in the art that the flow state of the airflow can be changed by adjusting the Reynolds number of the airflow. The brim 340 and the baffle suppress the airflow disturbance through the principle of aerodynamics, and form a stable combustion zone between the two. Specifically, under the blocking effect of the brim 340 and the baffle on the airflow, the airflow velocity between the brim 340 and the baffle is reduced, so that the Reynolds number of the airflow between the brim 340 and the baffle is Re=ρvd / μ<2000 (ρ is the air density of 1.2 kg / m 3 , d is the height between the brim 340 and the baffle, μ is the air dynamic viscosity of 1.8×10 -5 The flame is then forced to move from turbulent, eddy (Re > 2000) airflow between the brim 340 and the baffle to laminar flow (Re < 2000), eliminating disordered vortices. Because the airflow around the flame is relatively stable in a laminar state and is not easily extinguished, maintaining laminar flow helps stabilize the flame at the flame retaining hole 330 facing the thermocouple 500 near the thermocouple 500, ensuring that the thermocouple 500 detects sufficient thermoelectric potential, maintaining the gas supply, and achieving stable combustion.

[0068] When a flame burns at the flame retaining hole 330 of the inner ring flame cap 300, the combined action of the brim 340 and the baffle ensures a stable flame at the flame retaining hole 330 between the brim 340 and the baffle, ensuring the accuracy of thermocouple 500 detection and, in turn, the safety and reliability of the burner. The brim 340 prevents the oil-water mixture flowing downward from top to bottom from clogging the flame retaining hole 330, simplifying burner maintenance and improving the user experience.

[0069] In one embodiment, Figure 1 、 Figure 2 and Figure 5 As shown, the top of the inner ring fire cover 300 is provided with a plurality of inner ring main fire holes 360, which are in communication with the inner ring cavity 310. For example, the plurality of inner ring main fire holes 360 are arranged in an array on the top of the inner ring fire cover 300, and the above arrangement can form a uniform flame on the top of the inner ring fire cover 300.

[0070] The sidewall of the inner ring fire cover 300, located above the brim 340, is equipped with an ignition portion, which communicates with the inner ring cavity 310. Some of the gas in the inner ring cavity 310 can be ejected from the ignition portion. When the ignition needle 600 of the gas stove ignites the gas ejected from the ignition hole 320, the flame at the ignition hole 320 can propagate horizontally to the flame retaining hole 330. The flame at the flame retaining hole 330 can then propagate upward to the ignition portion, and the flame at the ignition portion can then propagate upward to the inner ring main fire hole 360.

[0071] By providing a ignition portion, the flame at the fire-keeping hole 330 is facilitated to propagate upward to the position of the inner ring main fire hole 360, and the inner ring fire cover 300 can achieve the effect of rapid and stable fire transmission. In addition, the ignition portion is provided between the fire-keeping hole 330 and the inner ring main fire hole 360. When the pressure in the inner ring cavity 310 is relatively high, the ignition portion can act as a pressure relief. The ignition hole 320, the fire-keeping hole 330, the ignition portion and the inner ring main fire hole 360 ​​can effectively and evenly disperse the static pressure of the gas in the inner ring cavity 310, and thus the flame at the position of the fire-keeping hole 330 can burn more stably. The gas at the fire hole outlet of the inner ring fire cover 300 is released evenly and the flow rate is stable, which can effectively solve the problems of flameout and slow fire transmission under special combustion conditions such as high pressure, cold state and flame limit gas. It enables the flame to be stably burned and spread at various locations such as the fire-keeping hole 330 under the above-mentioned harsh working conditions, further improving the accuracy of the thermocouple 500 detection to ensure the safety and reliability of the burner. In addition, the flame at the ignition portion can further dry the oil-water mixture on the brim 340 , further preventing the oil-water mixture from clogging the fire retaining hole 330 .

[0072] In a specific embodiment, Figure 1 、 Figure 2 、 Figure 5 and Figure 8As shown, multiple inner ring main fire holes 360 are arranged in an array around the axis of the inner ring fire cover 300. Exemplarily, the top of the inner ring fire cover 300 is provided with multiple inner ring protrusions 370, and the multiple inner ring protrusions 370 are arranged in a ring array around the axis of the inner ring fire cover 300, and the multiple inner ring protrusions 370 form a "three-dimensional petal structure". Each inner ring protrusion 370 is respectively provided with multiple inner ring main fire holes 360, so that the multiple inner ring main fire holes 360 on the top of the inner ring fire cover 300 are evenly distributed in all directions. Through the inner ring main fire holes 360 evenly distributed in all directions on the inner ring fire cover 300 and the outer ring main fire holes 240 evenly distributed in all directions on the outer ring fire cover 200, the effective contact area and uniformity between the burner flame and the bottom of the pot are effectively improved, so that the temperature gradient at all parts of the bottom of the pot transitions smoothly, and the same temperature is achieved in one pot, which is particularly beneficial for cooking scenes such as frying that require high temperature uniformity.

[0073] The ignition portion includes an ignition groove 351 arranged around the axis of the inner ring fire cover 300 and communicating with the inner ring cavity 310. The ignition groove 351 extends laterally. When the flame from the fire retaining hole 330 is transferred to the ignition groove 351, a ring-shaped flame is formed there. The bottom surface of the ignition groove 351 can be connected to the top surface of the brim 340, facilitating the processing of the inner ring fire cover 300.

[0074] like Figure 8 As shown, after the flame at the ignition groove 351 is transferred upward to the inner ring main fire hole 360, the flame at the inner ring main fire hole 360 ​​can be transferred outward to the outer ring main fire hole 240. The gradient three-dimensional fire transfer channel structure formed in sequence by the ignition hole 320, the fire protection hole 330, the ignition groove 351, the inner ring main fire hole 360 ​​and the outer ring main fire hole 240 can achieve the effect of rapid and stable fire transfer.

[0075] By setting the ignition groove 351 between the inner ring main fire hole 360 ​​and the fire protection hole 330, when the distance between adjacent inner ring main fire holes 360 is relatively far, the annular flame formed at the position of the ignition groove 351 can reliably ignite the gas ejected from different inner ring main fire holes 360. The ignition hole 320, the fire protection hole 330, the ignition groove 351 and the inner ring main fire hole 360 ​​define a multi-stage ignition path, thereby improving the speed and stability of fire transmission. When the pressure in the inner ring cavity 310 is relatively high, the ignition groove 351 can serve as a pressure relief. At the same time, the flame at the position of the ignition groove 351 can further dry the oil-water mixture on the brim 340. Under the joint action of the ignition groove 351, the brim 340 and the baffle, the flame at the position of the fire protection hole 330 can burn stably, ensuring the detection accuracy of the thermocouple 500 and ensuring the fire transmission stability of the inner ring fire cover 300.

[0076] In a specific embodiment, Figure 5 、 Figure 6 and Figure 9As shown, a plurality of ignition holes 352 are opened on the wall surface of the ignition groove 351 , one end of each ignition hole 352 is connected to the interior of the ignition groove 351 , and the other end of each ignition hole 352 is connected to the inner ring cavity 310 .

[0077] Exemplarily, the ignition holes 352 are provided on the bottom wall of the ignition groove 351. Each ignition hole 352 can be of the same height. The ignition groove 351 communicates with the inner ring cavity 310 through multiple ignition holes 352. Specifically, the multiple ignition holes 352 can be arranged at equal intervals around the axis of the inner ring fire cover 300 to ensure a uniform flame at the ignition groove 351. The ignition groove 351 can then provide uniform pressure relief, ensuring stable combustion of the flame at the location of the fire retaining hole 330. This embodiment does not limit the specific number of ignition holes 352, and those skilled in the art can arrange them according to actual needs.

[0078] like Figure 1 and Figure 8 As shown, a fire protection channel 390 is defined between the brim 340 and the flow blocking portion, and at least part of the fire protection hole 330 is disposed in the fire protection channel 390 .

[0079] The fire protection channel 390 extends along the circumference of the inner ring fire cover 300. The flow blocker partially blocks airflow from bottom to top into the fire protection channel 390, while the brim 340 partially blocks airflow from top to bottom into the fire protection channel 390 and also blocks oil-water mixture flowing downward. The brim 340 and flow blocker ensure stable flame combustion at the fire protection hole 330 within the fire protection channel 390, ensuring the accuracy of the thermocouple 500's detection.

[0080] In one embodiment, Figure 1 、 Figure 4 、 Figure 6 and Figures 11 to 13 As shown, the brim 340 comprises a main portion 341 and wing portions 342, which are connected in sequence along the circumference of the inner ring fire cover 300. The main portion 341 is arcuate. In the radial direction of the inner ring fire cover 300, the main portion 341 is larger than the wing portions 342. The ignition hole 320 is located below the main portion 341, and the fire protection hole 330 is located below the wing portions 342.

[0081] For example, there are multiple ignition holes 320 and multiple flame-keeping holes 330. Along the circumference of the inner ring fire cover 300, the multiple flame-keeping holes 330 are located on one side of the multiple ignition holes 320. The multiple ignition holes 320 and the multiple flame-keeping holes 330 are arranged at intervals along the circumference of the inner ring fire cover 300. Because the brim 340 can block the oil-water mixture flowing from top to bottom, the brim 340 can reduce the probability of clogging the ignition holes 320 and the flame-keeping holes 330, ensuring that the flames at the ignition holes 320 and the flame-keeping holes 330 can burn stably and the burner can ignite normally, which helps to further simplify the burner maintenance process and improve the user experience.

[0082] It is worth mentioning that the main body 341 of the brim 340 located above the ignition hole 320 can be used to ignite the burner. When the ignition needle 600 of the gas stove is energized, an arc can be formed between the end of the ignition needle 600 and the main body 341, and the arc can ignite the burner.

[0083] Specifically, the radial dimension of the main body 341 is gradually varied along the circumference of the inner ring fire cover 300, and the distance between the main body 341 and the ignition needle 600 varies along the circumference of the inner ring fire cover 300. When the ignition needle 600 is energized, an arc is formed between the end of the ignition needle 600 and the main body 341, igniting the gas ejected from the ignition hole 320.

[0084] Here, the radial dimension of the brim 340 in the inner ring fire cover 300 is defined as the width of the brim 340, that is, the maximum width of the main body 341 is greater than the width of the wing 342. Figures 11 to 13 As shown, the brim 340 features a streamlined, tapered width design. For example, the maximum width of the main body 341 can be 4.5 mm, while the width of the wing 342 can be 1.5 mm. The main body 341 is compatible with electrode discharge spacings ranging from 2.5 mm to 5.5 mm, improving compatibility with ignition pins 600 of varying specifications. The wing 342 is narrower than the main body 341, facilitating the flame from the flame retaining hole 330 below the wing 342 to pass over the wing 342 and upward.

[0085] Through the above-mentioned arrangement, the main body 341 of the brim 340 can adapt to different ignition distances, and the ignition distance of the ignition needle 600 can be dynamically adjusted, thereby improving the compatibility of the burner with ignition needles 600 of different specifications, and helping to reduce the universalization cost of the burner. The main body 341 of the brim 340 improves the ignition success rate and stability of the burner, and the burner can still reliably ignite and maintain the flame in harsh environments such as low temperature and wind. The maximum width of the main body 341 is greater than the width of the wing 342, which facilitates the upward transmission of the flame at the position of the fire protection hole 330. In addition, the main body 341 can block the oil-water mixture flowing from top to bottom from flowing to the ignition hole 320, reducing the probability of clogging of the ignition hole 320, and the wing 342 can block the oil-water mixture flowing from top to bottom from flowing to the fire protection hole 330, reducing the probability of clogging of the fire protection hole 330. The above-mentioned arrangement is conducive to extending the service life of the inner ring fire cover 300.

[0086] In a specific embodiment, Figures 4 to 6 and Figures 11 to 13 As shown, the wing portion 342 has an extension portion 343 at one end away from the main body portion 341. The dimension of the extension portion 343 in the radial direction of the inner ring fire cover 300 gradually decreases as it moves away from the wing portion 342. Exemplarily, the extension portion 343 is inclined away from the sidewall of the inner ring fire cover 300, such that the width of the extension portion 343 gradually decreases as it moves away from the wing portion 342.

[0087] There are multiple fire-keeping holes 330, spaced apart along the circumference of the inner ring fire cover 300. The fire-keeping holes 330 on the side away from the ignition hole 320 are located below the extension 343. For example, the multiple fire-keeping holes 330 are located to the right of the ignition hole 320, with the rightmost fire-keeping hole 330 located below the extension 343. When the flame at the ignition hole 320 ignites the multiple fire-keeping holes 330 sequentially from left to right, the extension 343 facilitates the upward propagation of the flame at the rightmost fire-keeping hole 330.

[0088] The baffle is located below the wing 342. As will be appreciated, a portion of the flame retaining hole 330 is located between the baffle and the wing 342. The combined action of the baffle and the wing 342 ensures stable combustion. The flame retaining hole 330 located between the baffle and the wing 342 faces the thermocouple 500, ensuring the detection accuracy of the thermocouple 500.

[0089] The above arrangement, while ensuring the detection accuracy of the thermocouple 500, is conducive to improving the flame transfer efficiency of the burner and enhancing the user experience.

[0090] like Figure 3 and Figure 4 As shown, the baffle extends beyond the thermocouple 500 at both ends of the inner ring fire cover 300 in the circumferential direction.

[0091] Specifically, the baffle portion has a circumferential dimension greater than the diameter of the thermocouple 500 around the inner ring fire cover 300. The baffle portion, located in the middle of the circumferential direction of the inner ring fire cover 300, can be aligned with the height of the thermocouple 500, such that both ends of the baffle portion extend beyond the thermocouple 500. This embodiment does not limit the extent to which the ends of the baffle portion extend beyond the thermocouple 500; those skilled in the art may adjust this dimension based on practical needs.

[0092] The above arrangement can ensure the blocking effect of the flow blocking portion on the airflow, thereby reliably ensuring the stability of the flame at the position of the fire protection hole 330 above the flow blocking portion corresponding to the thermocouple 500.

[0093] like Figures 1-4 and Figure 7 As shown, the gas distributor 100 further includes an outer ring gas distributor 120 surrounding the outer side of the central air inlet channel 110. The gas distributor 100 can distribute the gas so that the gas enters the central air inlet channel 110 and the outer ring gas distributor 120 respectively.

[0094] The burner also includes an outer ring fire cover 200 that is covered on the gas distribution seat 100 and connected to the outer ring gas distribution channel 120. Schematically, the outer ring fire cover 200 has an annular channel, which is connected to the outer ring gas distribution channel 120. In one possible implementation, a plurality of outer ring protrusions 230 are arranged in an annular array around the axis of the outer ring fire cover 200 at the top of the annular channel, and the plurality of outer ring protrusions 230 form a "three-dimensional petal structure". Each outer ring protrusion 230 is provided with an outer ring main fire hole 240 that is connected to the annular channel, so that the multiple outer ring main fire holes 240 on the outer ring fire cover 200 are evenly distributed in all directions. The above arrangement can enable a uniformly distributed flame to be formed on the outer ring fire cover 200.

[0095] The outer ring fire cover 200 has an annular mounting portion 210 in the middle, and the inner ring fire cover 300 is mounted on the mounting portion 210. The mounting portion 210 surrounds the central air intake passage 110. For example, after the inner ring fire cover 300 is mounted on the mounting portion 210, it can be secured to the mounting portion 210 using fasteners. The inner ring fire cover 300 has threaded holes 380 for fasteners to lock, and the mounting portion 210 has screw holes 250 for fasteners to pass through. Gas in the central air intake passage 110 can enter the inner ring cavity 310 of the inner ring fire cover 300 through the mounting portion 210.

[0096] In one possible implementation, the inner ring fire cover 300, the outer ring fire cover 200 and the gas distributor seat 100 can be connected into a whole. The inner ring fire cover 300, the outer ring fire cover 200 and the gas distributor seat 100 are locked in layers up and down to form an integrated structure, which can reduce the chance of the fire cover being placed incorrectly, reduce the chance of gas leakage, fire leakage and explosion of the burner, and improve the safety and reliability of the burner. It also has advantages in uniform fire distribution, uniform combustion, and heating the cookware with the same heat everywhere.

[0097] The baffle is a stepped portion 220 protruding from the outer periphery of the mounting portion 210. The stepped portion 220 can be integrally formed around the outer periphery of the mounting portion 210. The top surface of the stepped portion 220 can be a plane parallel to the radial direction of the inner ring fire cover 300. The cross-section of the stepped portion 220 can be approximately rectangular, and the thickness of the stepped portion 220 can range from 1 mm to 3 mm.

[0098] In this structure, a step portion 220 is protruded from the outer periphery of the mounting portion 210 as a flow blocking portion, which facilitates the processing and manufacturing of the flow blocking portion while ensuring stable combustion of the flame at the position of the fire-preserving hole 330 corresponding to the thermocouple 500.

[0099] The present application also provides a gas stove, comprising a burner head 400, a thermocouple 500, an ignition needle 600, and the aforementioned burner. The burner's gas distributor 100 is mounted on the burner head 400, and both the thermocouple 500 and the ignition needle 600 are disposed on the burner head 400. Both the thermocouple 500 and the ignition needle 600 are located outside the burner's inner ring fire cover 300. The burner head 400 can respectively introduce gas into the central air inlet channel 110 and the outer ring air distributor channel 120 of the gas distributor 100. Both the thermocouple 500 and the ignition needle 600 are located between the annular channels of the inner ring fire cover 300 and the outer ring fire cover 200.

[0100] The ignition needle 600 is positioned opposite the ignition hole 320 of the inner ring flame cover 300, and the thermocouple 500 is positioned opposite the flow-blocking portion of the burner. The arc generated by the end of the ignition needle 600 ignites the gas ejected from the ignition hole 320, and the flame at the ignition hole 320 ignites the gas ejected from the flame-preserving hole 330. The flow-blocking portion and the brim 340 above the flame-preserving hole 330 ensure stable combustion of the flame at the flame-preserving hole 330 opposite the thermocouple 500, improving the accuracy of the thermocouple 500's detection.

[0101] The gas stove provided in the present application adopts the above-mentioned burner, and the flame at the position of the fire-keeping hole 330 corresponding to the thermocouple 500 can burn stably. When there is a flame at the fire-keeping hole 330, it is ensured that the thermocouple 500 detects sufficient thermoelectric potential, maintains the gas supply, and achieves stable combustion, thereby ensuring the safety and reliability of the gas stove and improving the user experience.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A burner, characterized in that: include: The air distributor has a central air inlet channel; an inner ring fire cover, mounted on the gas distributor seat, the inner ring fire cover having an inner ring cavity in communication with the central air inlet passage, an ignition hole and a fire preservation hole respectively in communication with the inner ring cavity being provided on a side wall of the inner ring fire cover, the ignition hole and the fire preservation hole being arranged along the circumference of the inner ring fire cover, the ignition hole being arranged opposite to the ignition needle, and the fire preservation hole being arranged opposite to the thermocouple; Among them, a brim is provided on the side wall of the inner ring fire cover, the fire protection hole is located below the brim, and a flow blocking part is provided below the fire protection hole. The brim and the flow blocking part respectively protrude from the side wall of the inner ring fire cover, and the flow blocking part is configured to be arranged opposite to the thermocouple.

2. The burner according to claim 1, characterized in that The top of the inner ring fire cover is provided with a plurality of inner ring main fire holes, and the inner ring main fire holes are communicated with the inner ring cavity; The side wall of the inner ring fire cover is located above the brim and is provided with an ignition portion, and the ignition portion is communicated with the inner ring cavity.

3. The burner according to claim 2, characterized in that The plurality of inner ring main fire holes are arranged in an array around the axis of the inner ring fire cover; The ignition portion includes an ignition groove arranged around the axis of the inner ring fire cover, and the ignition groove is communicated with the inner ring cavity.

4. The burner according to claim 3, characterized in that A plurality of ignition holes are provided on the wall surface of the ignition groove, one end of each ignition hole is communicated with the interior of the ignition groove, and the other end of each ignition hole is communicated with the inner ring cavity.

5. The burner according to claim 1, characterized in that A fire protection channel is defined between the brim and the flow blocking portion, and at least part of the fire protection holes are arranged in the fire protection channel.

6. The burner according to claim 1, characterized in that The brim includes a main body and wing parts sequentially connected along the circumference of the inner ring fire cover, and the main body is in an arc shape; In the radial direction of the inner ring fire cover, the size of the main body is larger than the size of the wing; The ignition hole is located below the main body, and the fire protection hole is located below the wing.

7. The burner according to claim 6, characterized in that The wing portion has an extension portion at one end away from the main body portion; The radial dimension of the extension portion of the inner ring fire cover gradually decreases in a direction away from the wing portion; There are multiple fire-keeping holes, which are spaced apart along the circumference of the inner ring fire cover, and the fire-keeping holes on the side away from the ignition hole are located below the extension portion; The flow blocking portion is located below the wing portion.

8. The burner according to claim 1, characterized in that The baffle portion extends beyond the thermocouple at both ends of the inner ring fire cover in the circumferential direction.

9. The burner according to claim 1, characterized in that The air distributor seat further comprises an outer ring air distributor channel surrounding the outer side of the central air inlet channel; The burner further comprises an outer ring fire cover which is provided on the gas distribution seat and is in communication with the outer ring gas distribution channel; An annular mounting portion is provided in the middle of the outer ring fire cover, and the inner ring fire cover is mounted on the mounting portion. The mounting portion is arranged around the central air intake channel, and the baffle portion is a step portion protruding from the outer periphery of the mounting portion.

10. A gas stove, characterized in that: Comprising a burner head, a thermocouple, an ignition needle and a burner according to any one of claims 1 to 9; The gas distribution seat of the burner is installed on the burner head, the thermocouple and the ignition needle are both arranged on the burner head, the thermocouple and the ignition needle are both located on the outside of the inner ring fire cover of the burner, the ignition needle is arranged opposite to the ignition hole of the inner ring fire cover, and the thermocouple is arranged opposite to the baffle part of the burner.

Images