Ignition device and ignition method of combustor

Abstract

The invention discloses an ignition device and an ignition method of a combustor, the combustor comprises a combustion plate arranged at an interval with the inner wall of an outer fire cover, an ignition part and an ignition needle are arranged between the combustion plate and the outer fire cover, an ignition hole is formed in the side wall, adjacent to the ignition needle, of the ignition part, and the ignition end of the ignition needle is arranged opposite to the ignition hole; the ignition part transmits fuel gas to the combustion plate and the outer wall of the outer fire cover through the fire transfer channel, the fuel gas is transmitted to the ignition hole through the first ignition channel, when the ignition device ignites, the ignition end of the ignition needle ignites the fuel gas at the ignition hole, and then flames are transmitted to the fire transfer channel; and flames in the fire transfer channel ignite gas on the combustion plate and the outer wall of the outer fire cover, and through the arrangement of the ignition device, the fire transfer efficiency of the combustor after ignition is improved.

Description

Technical Field

[0001] The present invention belongs to the field of gas stoves, and particularly relates to an ignition device and an ignition method for a burner. Background Art

[0002] Gas stoves are commonly used burners in households. A gas stove generally includes an inner fire cap, an outer fire cap, and a gas mixing chamber. The inner fire cap and the outer fire cap are respectively connected to the gas mixing chamber, and the mixed gas burns in the inner ring fire cap and the outer ring fire cap respectively.

[0003] The outer fire cap is usually arranged above the gas mixing chamber. The gas mixing chamber is connected to the outer fire cap, and the gas in the gas mixing chamber can enter the outer fire cap, then flow out from the fire holes of the outer ring fire cap, and then start to burn.

[0004] An ignition device is also arranged between the outer fire cap and the inner fire cap. The ignition structure usually has an ignition part, and the ignition part can guide the flame of the inner fire cap to the outer fire cap, and then the flame ignites the gas of the outer ring fire cap.

[0005] In order to improve the flame transfer efficiency between the inner fire cap and the outer fire cap, the present invention provides an ignition device for a burner.

[0006] In the prior art, the utility model patent with the publication number of CN 208794406 U discloses a burner for a cooking stove, which includes a base and a fire cap connected to the base. An ignition needle is arranged at a position adjacent to the outer peripheral wall of the fire cap, and at least one ignition hole is formed in the wall surface of the outer peripheral wall corresponding to the ignition needle. The feature is that: an ignition groove is arranged above or below the ignition hole on the outer peripheral wall. However, in this utility model, the ignition hole and the ignition groove are arranged on the outer fire cap, resulting in low flame transfer efficiency between the inner fire cap and the outer fire cap. In view of this, the present invention is proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide an ignition device for a burner. When the ignition device ignites, the ignition end of the ignition needle ignites the gas in the ignition hole, and the flame is transmitted to the fire transfer channel through the ignition groove, and the gas on the combustion plate and the outer wall of the outer fire cap is ignited.

[0008] To achieve the above purpose, the technical solution of the present invention is as follows:

[0009] A combustion plate arranged at an interval from the inner wall of the outer fire cap,

[0010] An ignition part and an opposite ignition needle are arranged between the combustion plate and the outer fire cap;

[0011] The ignition part includes a fire transfer channel connecting the combustion plate and the outer wall of the outer fire cap and an ignition hole arranged on the side of the fire transfer channel close to the combustion plate;

[0012] The flame of the ignition hole is transmitted to the outer wall of the combustion plate and the outer fire cover through the flame transmission channel, and the gas is transmitted to the ignition hole through the first ignition channel. The flame transmission channel and the first ignition channel transmit the gas into the space between the combustion plate and the outer fire cover. When the ignition device ignites, the ignition end of the ignition needle ignites the gas overflowing from the ignition hole, and then the flame ignites the outer walls of the combustion plate and the outer fire cover respectively along the ignition channel.

[0013] The ignition hole is arranged on the side wall of the ignition inlet of the flame transmission channel and cooperates with the flame transmission channel to ensure that the gas fills the space between the combustion disc and the ignition device, improving the ignition efficiency of the ignition device.

[0014] Optionally, a gas transmission structure is arranged at the lower end of the flame transmission channel. The gas transmission structure provides gas for the flame transmission channel and the ignition hole through at least the air outlet and the first ignition channel respectively, and the cross-sectional areas of the air outlet and the ignition hole are different. The gas is transmitted from the gas transmission structure to the flame transmission channel and the ignition hole, and due to the difference in the cross-sectional areas of the fire outlet and the ignition hole, the overflow rates of the gas from the flame transmission channel and the ignition hole are different. Different flow velocities of the gas are set for different ignition and flame transmission functions.

[0015] Optionally, the side wall where the ignition inlet and the ignition hole are located is connected through an ignition groove;

[0016] The ignition groove is arranged above the ignition hole to connect the gas inside and outside the flame transmission channel through the ignition groove. After the ignition device ignites, the flame ignites the flame transmission channel through the ignition groove, improving the flame transmission efficiency of the ignition device.

[0017] Optionally, small holes are arranged on the side wall of the ignition groove close to the ignition hole;

[0018] The gas transmission structure provides gas for the small holes in the groove through the second ignition channel. The gas is transmitted into the ignition groove through the small holes in the groove. When the ignition device ignites, the flame ignited by the ignition hole ignites the gas in the ignition groove and then transmits it into the flame transmission channel. The arrangement of the small holes in the groove further improves the flame transmission efficiency of the ignition device.

[0019] Optionally, the gas transmission structure is provided with a plurality of air outlets communicating with the flame transmission channel,

[0020] and at least one air outlet is arranged at the bottom end of the flame transmission channel close to the ignition inlet. After the ignition device ignites, the flame is transmitted from the ignition groove to the ignition channel and then ignites the gas overflowing from the air outlet arranged at the bottom end of the ignition inlet, thereby igniting the combustion plate.

[0021] Optionally, the gas transmission structure includes a first gas transmission channel and a second gas transmission channel connected in sequence;

[0022] The second gas transmission channel is located at the upper end of the first gas transmission channel and communicates with the flame transmission channel through the air outlet;

[0023] The fuel gas enters the second gas transmission channel, the first ignition channel and the second ignition channel respectively from the first gas transmission channel and is transmitted to the flame transmission channel, the ignition holes and the small holes in the groove. During the process that the fuel gas in the first gas transmission channel is respectively shunted to the flame transmission channel, the ignition holes and the small holes in the groove through the second gas transmission channel, the first ignition channel and the second ignition channel, the flow rate of the fuel gas is further reduced, which is beneficial to the flame to ignite the fuel gas.

[0024] Optionally, a plurality of gas transmission structures are arranged from the ignition inlet to the ignition outlet below the flame transmission channel;

[0025] The inlets of the first ignition channel and the second ignition channel are located in the gas transmission structure near the inner side of the outer fire cap. The plurality of gas transmission structures provide fuel gas for the flame transmission channel. The first ignition channel and the second ignition channel are also arranged in the gas transmission structure near the inner side of the outer fire cap, which improves the filling rate of the fuel gas between the combustion plate and the outer wall of the outer fire cap, and further improves the ignition efficiency of the ignition device.

[0026] Optionally, the depth of the ignition groove on the side close to the ignition needle is deeper than that on the side close to the flame transmission channel, which improves the rate of the flame transferring from the side close to the ignition groove to the side of the flame transmission channel;

[0027] The height of the ignition groove close to the combustion plate is flush with the top end of the combustion plate;

[0028] And the height of the ignition groove at the end close to the combustion plate is higher than the height of the end of the ignition groove far from the combustion plate. The fuel gas overflowing from the small holes in the groove is mixed with the fuel gas overflowing from the ignition groove and the combustion plate. When the ignition device ignites, the flame transfers along the ignition groove to the combustion plate and cooperates with the ignition inlet of the flame transmission channel to realize the ignition of the combustion plate.

[0029] Optionally, two ignition holes are provided, and the two ignition holes are arranged in a cross with the ignition needle. The discharge end of the ignition needle is located between the two ignition holes, which improves the ignition stability of the fuel gas overflowing from the ignition holes.

[0030] Optionally, an ignition method is provided. The ignition end of the ignition needle ignites the fuel gas in the ignition holes,

[0031] The ignition holes are inclined towards the ignition groove to ignite the fuel gas overflowing from the small holes in the groove and then ignite the ignition groove. The ignition groove further ignites the flame transmission channel. The flame in the flame transmission channel is respectively transmitted to the ignition outlets on the combustion plate and the outer wall of the outer fire cap.

[0032] The present invention has at least the following beneficial effects:

[0033] 1. In the present invention, an ignition part and an ignition needle are arranged between a combustion plate and an outer fire cover. An ignition hole is formed in a side wall adjacent to the ignition part and the ignition needle. An ignition groove is provided at the upper end of the ignition hole. The ignition groove communicates a fire transmission channel with the side wall where the ignition hole is located. When the ignition device ignites, the ignition end of the ignition needle discharges electricity to ignite the gas overflowing from the ignition hole, and the flame is transmitted to the fire transmission channel along the ignition groove, and the outer walls of the combustion plate and the outer fire cover are respectively ignited through the fire transmission channel, improving the ignition efficiency of the outer walls of the combustion plate and the outer fire cover.

[0034] 2. Small holes are also provided in the ignition groove of the present invention. The gas transmission structures located below the fire transmission channel respectively supply gas to the fire transmission channel, the ignition hole, and the small holes in the groove through an air outlet, a first ignition channel, and a second ignition channel. The gas is shunted through the air outlet, the first ignition channel, and the second ignition channel, reducing the flow rate and improving the ignition stability of the ignition device.

[0035] 3. In the present invention, the depth of the ignition groove on the side close to the ignition needle is deeper than that on the side close to the fire transmission channel, improving the rate of the flame being transmitted from the side close to the ignition groove to the side of the fire transmission channel; the height of the ignition groove close to the combustion plate is flush with the top end of the combustion plate, and the height of the ignition groove at the end close to the combustion plate is higher than the height of the ignition groove far from the combustion plate. The gas overflowing from the small holes in the groove is mixed with the gas overflowing from the combustion plate and the gas overflowing from the ignition inlet. When the ignition device ignites, the flame is transmitted along the ignition groove to the combustion plate and the fire transmission channel, and the ignition inlet of the fire transmission channel and the ignition groove cooperate to achieve the ignition of the combustion plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 10. High-transparency plate; 102. Support plate; 30. Outer fire cover; 20. Combustion plate; 80. Thermocouple; 90. Ignition needle; 305. Ignition part; 3051. Ignition groove; 3051-a. Small holes in the groove; 3052. Avoidance structure; 3053. First gas transmission channel; 3054. Second gas transmission channel; 3055. First cavity; 3057. Ignition hole; 315. Through hole; 308. Ignition outlet; 308-a. Ignition inlet; 3081. U-shaped groove; 3082. Fire transmission groove; 3083. Flame stabilizing hole; 3084. Fire outlet 3084-a. First fire outlet; 3084-b. Second fire outlet; 3084-1. First hole; 3084-2. Second hole; 3084-3. Aggregation part; 316-c. Outer wall; 316-1. Inclined annular surface; 316-2. Smooth transition part; 316-3. Bent surface; 316-4. Side annular surface; 316-5. Inner annular surface; 316-6. Inclined surface.

[0037] Figure 1 Schematic cross-sectional view of the burner according to the present invention

[0038] Figure 2 Schematic view of the ignition inlet according to the present invention;

[0039] Figure 3 Schematic diagram of the ignition outlet of the present invention;

[0040] Figure 4 Schematic diagram of the cooperation between the combustion plate and the burner base of the present invention;

[0041] Figure 5 Schematic diagram of the structure of the flame outlet hole

[0042] Figure 6 is Figure 5 Cross-sectional view taken along line A-A in

[0043] Figure 7 is Figure 5 Cross-sectional view taken along line B-B in

[0044] Figure 8 is Figure 7 Partial enlarged view at C in

[0045] Figure 9 Schematic diagram of the structure of the first hole;

[0046] Figure 10 Schematic diagram of the structure of the high-transparency plate;

[0047] Figure 11 is Figure 10 A cross-sectional schematic view of Detailed implementation manners

[0048] The exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. It can be understood by those skilled in the art that the following embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0049] In the description of the present invention, unless otherwise clearly specified and limited, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention 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 construed as a limitation of the present invention.

[0051] The burner of the present invention includes an inner fire cover and an outer fire cover 30. The outer fire cover 30 is annular as a whole and is installed on the fire cover seat as a whole, cooperating with the fire cover seat to form an inner ring air flow channel. The inner fire cover is coaxially and spacedly arranged in the inner circle of the outer fire cover 30 (the inner fire cover in this application includes a combustion plate, which will not be elaborated hereinafter). The gas is divided into an inner ring air flow and an outer ring air flow. The inner ring air flow enters the combustion plate through the inner ring air flow channel below the combustion plate (it should be noted that in this application, the gas refers to the mixed gas of primary air and gas or gas. After the gas is ignited by the ignition device, it is in the form of flame in the combustion plate 20, the outer wall 306 of the outer fire cover 30 and the fire transfer channel, which will not be elaborated hereinafter); the outer ring air flow reaches the outer wall 316-c of the outer fire cover 30 through the outer ring air flow channel formed by the outer fire cover 30 and the fire cover seat. It should be noted that the outer wall 316-c of the outer fire cover includes fire holes 3084 arranged around the outer wall 316-c, and the outer ring air flow reaches the fire holes 3084 from the cavity.

[0052] Further, a high-permeability plate is arranged above the combustion plate 20. When the user uses the burner, the heat generated by the combustion plate 20 passes through the high-permeability plate to reach the pot body and heat the bottom of the pot. Since the combustion plate 20 is made of a porous structure material, the presence of the high-permeability plate can prevent the soup, residues, etc. generated by overflowing the pot from flowing onto the combustion plate 20 and causing blockage of the combustion plate 20. On the one hand, it can ensure the stable combustion of the combustion plate 20, and on the other hand, it is convenient for the user to clean.

[0053] Regarding the relationship between the ignition part 305 and the outer fire cover 30, the ignition part 305 can be integrally provided with the outer fire cover 30 as a part of the outer fire cover 30; it can also be installed on the outer fire cover 30. When the ignition part 305 and the outer fire cover 30 are installed in place, the ignition part 305 is arranged at one end of the outer wall 316-c of the outer fire cover 30 as a part of the outer wall 316-c of the outer fire cover 30.

[0054] From Figure 1As shown in the figure, this embodiment provides an ignition device for a burner. The burner includes a combustion plate 20 spaced from the inner wall of the outer fire cover 30. An ignition part 305 is arranged between the combustion plate 20 and the outer fire cover 30. The ignition part 305 includes a fire transfer channel. The gas is respectively transmitted to the combustion plate 20 and the outer wall 316-c of the outer fire cover 30 through the fire transfer channel. The fire transfer channel includes an ignition outlet 308 on the outer wall 316-c of the outer fire cover 30 and an ignition inlet 308-a arranged close to the combustion plate 20. After the gas passes through the fire transfer channel and reaches the ignition outlet 308, it merges with the gas in the fire outlet hole 3084. When the ignition device ignites, the flame is transmitted from the ignition inlet 308-a of the fire transfer channel to the combustion plate 20, and the fire outlet hole 3084 arranged around the outer wall 316-c is ignited by the ignition outlet 308 of the fire transfer channel. The ignition part 305 further includes a first cavity 3055. The first cavity 3055 is located below the fire transfer channel. A gas transmission structure is arranged between the first cavity 3055 and the fire transfer channel. The first cavity 3055 is communicated with the inner cavity of the fire transfer channel through the gas transmission structure. The gas enters the first cavity 3055 through the inner ring air flow channel or through the inner ring air flow channel and the outer ring air flow channel, and then is transmitted to the combustion plate 20 and the fire outlet 308 of the outer wall 316-c of the outer fire cover 30 through the fire transfer channel.

[0055] It should be noted that the fire transfer channel described in the present invention is a columnar channel extending from the combustion plate 20 towards the outer fire cover 30. At least part of the fire transfer channel extends into the outer fire cover 30 or extends to the outer wall 316-c of the outer fire cover 30.

[0056] Specifically, in the ignition device of the burner in this embodiment, the gas reaches the combustion plate 20 through the inner ring air flow channel and reaches the outer wall 316-c of the outer fire cover 30 through the outer ring air flow channel. And before the gas reaches the outer wall 316-c of the outer fire cover 30 or the combustion plate 20, a part of the gas is diverted into the first cavity 3055. The gas in the first cavity 3055 is diverted to the outer wall 316-c of the outer fire cover 30 and the combustion plate 20 through the fire transfer channel, and is mixed with the gas reaching the combustion plate 20 and the outer wall 316-c of the outer fire cover 30 through the inner ring air flow channel and the outer ring air flow channel, so as to improve the ignition efficiency when the ignition device ignites.

[0057] Furthermore, in the process that the gas is diverted from the inner ring air flow channel through the ignition part to the combustion plate 20 and the outer wall 316-c of the outer fire cover 30, the flow rate is adjusted through the first cavity 3055 of the ignition part 305, the fire transfer channel and the gas transmission structure between the first cavity 3055 and the fire transfer channel, further improving the ignition stability of the ignition device. When the ignition device of the burner ignites, after the gas with adjusted flow rate is ignited, the flame is transmitted to the combustion plate 20 and the outer wall 316-c of the outer fire cover 30.

[0058] Further, the flame transfer passage includes an ignition inlet 308-a and an ignition outlet 308. The ignition inlet 308-a is at least partially disposed opposite to the side wall of the combustion plate 20, and the ignition inlet 308-a is at least partially higher than the top end of the combustion plate 20. Moreover, the gas flowing through the ignition inlet 308-a to the combustion plate 200 can be fully mixed with the gas in the combustion plate 20, thereby improving the efficiency of the ignition device in igniting the combustion plate 20. The ignition outlet 308 is provided on the outer wall 316-c of the outer fire cover 30. When the gas flows out through the ignition outlet 308, it is mixed with the gas in the fire holes 3084 on the outer fire cover 30, thereby improving the efficiency of the ignition device in igniting the outer fire cover. Generally, the diameter of the ignition outlet 308 is larger than that of the fire holes 3084, and the flame at the ignition outlet 308 extends from the fire holes 3084 on both sides of the ignition outlet 308 to the outer wall 316-c of the outer fire cover 30.

[0059] As a specific implementation manner of this embodiment, after the outer fire cover 30 and the fire cover seat are installed in place, the fire cover seat serves as the bottom wall of the first cavity 3055, making the first cavity 3055 form a closed cavity. The gas enters the first cavity 3055 through the through holes 315 or through channels provided on the peripheral wall of the first cavity 3055. Further, the first cavity 3055 is formed by being recessed from the lower edge of the outer fire cover 30 and the fire cover seat in a direction away from the lower end. The first cavity 3055 is generally rectangular and is located below the flame transfer passage. The top of the first cavity 3055 is communicated with the flame transfer passage through a gas transmission structure. The first cavity 3055 can be provided with a bottom, or when the outer fire cover 30 and the fire cover seat are installed in place, the first cavity 3055 cooperates with the upper surface of the base to achieve sealing. At this time, the fire cover seat serves as the bottom of the first cavity 3055 to prevent leakage of the gas flowing into the first cavity 3055 and to prevent the inner ring air flow and the outer ring air flow from mixing, ensuring that all the air flow entering the first cavity 3055 enters the flame transfer passage.

[0060] Further, the first cavity 3055 is communicated with the lower end of the combustion plate 20 and the inner ring air flow passage that supplies gas to the combustion plate 20. Before the inner ring air flow reaches the combustion plate 20, part of the gas is diverted into the first cavity 3055; after the inner ring air flow reaches the combustion plate 20, part of the gas is blocked by the combustion plate 20 and enters the first cavity 3055.

[0061] Specifically, one end of the first cavity 3055 close to the inner annular gas flow channel communicates with the peripheral wall of the inner annular gas flow channel; the other end of the first cavity 3055 away from the inner annular gas flow channel extends towards the outer wall 31 of the outer burner cap 30 and at least partially extends into the inner wall of the outer burner cap 30; when the first cavity 3055 extends to the inner wall of the outer burner cap 30, the inner wall of the outer burner cap 30 serves as the cavity wall of the first cavity 3055 at the end away from the inner annular gas flow channel; or, when the first cavity 3055 extends towards the outer wall 31 of the outer burner cap 30 and extends into the inner wall of the outer burner cap 30 at the end away from the inner annular gas flow channel, the cavity wall of the first cavity 3055 at the end away from the inner annular gas flow channel serves as a part of the inner wall of the outer burner cap 30.

[0062] As a specific implementation manner of this embodiment, both ends of the first cavity 3055 in the radial direction of the outer burner cap 30 are respectively close to the inner annular gas flow channel and the outer annular gas flow channel, so that before the inner annular gas flow or the outer annular gas flow reaches the combustion plate 20 or the outer wall 316-c of the outer burner cap 30, the gas is split into the first cavity 2055; the first cavity 3055 can be selectively communicated with the inner annular gas flow channel, or the first cavity 3055 can be communicated with both the inner annular gas flow and the outer annular gas flow.

[0063] As a specific implementation manner of this embodiment, when the cavity wall of the first cavity 3055 serves as a part of the peripheral wall of the inner annular gas flow channel, the first cavity 3055 is communicated with the inner annular gas flow channel through a through hole 315. When the gas passes through the inner annular gas flow channel, a part of the gas is split and enters the first cavity 3055 through the through hole 315, and then enters the fire transfer channel through the gas transfer structure, and then is respectively transferred to the combustion plate 20 and the outer wall 316-c of the outer burner cap 30 through the ignition outlet 308-a and the ignition outlet 308.

[0064] As a specific implementation manner of this embodiment, when the cavity wall of the first cavity 3055 is spaced from the peripheral wall of the inner annular gas flow channel, the first cavity 3055 is communicated with the inner annular gas flow channel through a through channel. The connection manner between the first cavity 3055 and the inner annular gas flow channel is adjusted according to the actual situation of the burner, so as to improve the applicability of the present invention. Further, the cavity wall of the first cavity 3055 close to the inner annular gas flow channel is communicated with the inner annular gas flow channel through a through hole or a through channel; the first cavity 3055 can be communicated with the inner annular gas flow through a through hole or a through channel, or a through channel or a through hole can be provided to be simultaneously communicated with both the inner annular gas flow and the outer annular gas flow, so as to ensure that enough gas enters the first cavity 3055, thereby improving the ignition stability of the ignition device.

[0065] As a specific implementation of this embodiment, an inner ring air flow channel is formed below the inner wall of the outer fire cover 30 where the combustion plate 20 is installed. In the direction of the outer fire cover 30 approaching the combustion plate 20, the inner diameter of the inner ring air flow channel gradually increases, and the overall inner ring air flow channel is trumpet-shaped. When the gas passes through the trumpet-shaped inner ring air flow channel and reaches the combustion plate 20, the flow rate gradually decreases, which is beneficial to the full combustion of the gas.

[0066] Furthermore, the combustion plate 20 is installed at the trumpet opening with the largest inner diameter of the inner ring air flow intake channel. Before the inner ring air flow reaches the combustion plate 20, the flow rate gradually decreases, improving the combustion efficiency of the combustion plate 20.

[0067] As an implementation of this embodiment, when there is a gap between the first cavity 3055 and the inner ring air flow channel, the first cavity 3055 is communicated with the side wall of the inner ring air flow channel through a through channel. The end of the through channel communicating with the inner ring air flow channel is the intake end, and the end communicating with the first cavity 3055 is the outlet end.

[0068] Furthermore, the intake end is arranged below the combustion plate 20 and at a position where the inner diameter of the inner ring air flow channel is relatively large. During the process of the inner ring air flow sending the gas into the combustion plate 20, part of the gas blocked by the combustion plate 20 enters the first cavity 3055 through the intake end of the through channel; it should be noted that after the inner ring air flow is blocked by the combustion plate 20, a blocking force opposite to the intake direction of the inner ring air flow is formed. Due to the trumpet-shaped setting of the inner ring air flow channel, and the combustion plate 20 is arranged at the position with the largest opening, and the intake end is arranged at a position where the inner diameter of the inner ring air flow channel is relatively large. At this time, the intake end is arranged opposite to the lower end of the combustion plate 20. Part of the air flow blocked by the combustion plate 20 enters the through channel under the action of the blocking force. In addition, due to the trumpet-shaped setting of the inner ring air flow channel, the air flow affected by the blocking force will act on the peripheral wall of the inner ring air flow channel with a relatively large diameter and will not affect the subsequent supplied inner ring air flow.

[0069] Furthermore, the height of the intake end of the through channel on the peripheral wall of the inner ring air flow channel is higher than the outlet end on the cavity wall of the first cavity 3055, that is, the overall through channel is inclined between the intake end and the outlet end. After the inner ring air flow is blocked by the combustion plate 20, the inclined through channel is beneficial to reducing the flow rate of the gas when it enters the first cavity 3055.

[0070] Furthermore, a drainage structure is formed on the cavity wall of the first cavity 3055 near the outlet end. The drainage structure further reduces the flow rate of the gas entering the first cavity 3055 and adjusts the stability of the flow rate of the gas after entering the first cavity.

[0071] Further, the gas transmission structure includes an air inlet and an air outlet that connect the first cavity 3055 and the fire transmission channel. The air inlet is provided at the top of the first cavity 3055, and the air outlet is provided at the bottom of the fire transmission channel. After the gas enters the first cavity 3055 through the inclined through hole, it will not directly enter the gas transmission channel. After the first cavity 3055 is filled with the gas, it flows from the air inlet to the air outlet. During this process, the flow rate of the gas gradually decreases, thereby improving the ignition efficiency and ignition stability of the ignition device.

[0072] Further, the cross-sectional area of the air inlet is larger than that of the air outlet; when the gas in the first cavity 3055 passes through the gas transmission structure, the gas transmission structure adjusts the amount of gas entering the fire transmission channel. By controlling the rate at which the gas fills the gas channel, the flow rate of the gas is adjusted, thereby ensuring that the flow rate of the gas at the ignition outlets 308-a and 308 of the fire transmission channel is suitable for ignition stability or fire transmission stability.

[0073] Further, the gas transmission structure includes a first gas transmission channel 3054 and a second gas transmission channel 3053, and the cross-sectional area of the first gas transmission channel is larger than that of the second gas transmission channel 3054; when the gas passes through the first gas transmission channel 3054 and enters the second gas transmission channel 3053, the flow rate will be further adjusted, thereby improving the ignition stability of the ignition device.

[0074] As a specific implementation manner of this embodiment, the first gas transmission channel 3054 is in the shape of a hollow cylinder. The bottom of the first gas transmission channel 3054 is opened on the top wall of the cavity. The first gas transmission channel 3054 is vertically arranged between the first cavity 3055 and the second gas transmission channel 3053. The air flow entering the first cavity 3055 passes through the first gas transmission channel 3054 and then passes through the second gas transmission channel 3053 to fill the fire transmission channel; the second gas transmission channel 3053 is provided at the top end of the first gas transmission channel 3054. The second gas transmission channel 3053 is integrally in the shape of a hollow cylinder, and the cross-sectional size of the second gas transmission channel 3053 is smaller than that of the first gas transmission channel 3053; when the gas in the first cavity 3055 enters the fire transmission channel, the flow direction and flow rate are adjusted during the process of passing through the first gas transmission channel 3054 and the second gas transmission channel 3053, ensuring that the gas enters the fire transmission channel and still maintains a stable flow rate after filling the fire transmission channel.

[0075] Further, the first gas transmission channel 3054 includes at least one second gas transmission channel 3053. The second gas transmission channel 3053 is connected to the fire transmission channel through the first gas transmission channel 3054 provided at the lower end of the fire transmission channel, further improving the efficiency of filling the fire transmission channel with gas.

[0076] Further, the cross-sectional area of the first air transmission channel 3054 gradually contracts near the second air transmission channel 3053 to form an air transmission surface. The second air transmission channel 3053 is arranged on the air transmission surface to communicate with the fire transmission channel. When the air flow in the first air transmission channel 3054 enters the second air transmission channel 3053 through the air transmission surface, the air flow is buffered by the air transmission surface, further ensuring the stability of the gas flow rate after entering the fire transmission channel, thereby improving the ignition stability of the ignition device.

[0077] Further, the position of the air outlet of the second air transmission channel 3053 adjusts the direction according to the position of the first air transmission channel 3054 between the first cavity 3055 and the fire transmission channel. For example, if the first air transmission channel 3054 is arranged near the ignition inlet 308-a, then at least one second air transmission channel 3054 is inclined on the first air transmission channel 3053 in the direction towards the ignition outlet 308, ensuring that the gas uniformly fills the fire transmission channel.

[0078] Further, the ignition part 305 is provided with a plurality of air transmission structures, and the plurality of air transmission structures are arranged along the radial direction of the outer fire cover between the fire transmission channel and the cavity, ensuring that the gas entering the fire transmission channel from the first cavity 3055 through the air transmission structure is uniformly transmitted to each section of the fire transmission channel, improving the rate of the air flow filling the fire transmission channel, and improving the ignition efficiency of the burner.

[0079] As an implementation manner of this embodiment, in this implementation manner, the fire transmission channel is inclined in the ignition part 305, and the end near the inner side of the outer fire cover 30 is higher than the end near the outer side of the outer fire cover 30; due to the inclined setting of the fire transmission channel, the distance between the fire transmission channel and the cavity gradually decreases from the inner side to the outer side of the outer fire cover 30. At this time, the heights of the plurality of first air transmission channels 3053 located between the fire transmission channel and the cavity gradually decrease, and the height difference formed between the plurality of first air transmission channels 3053 is adapted to the inclination angle of the fire transmission channel, further improving the efficiency of the ignition part 305 in transmitting the air flow.

[0080] As a specific implementation manner of this embodiment, there are three air transmission structures between the fire transmission channel and the first cavity 3055;

[0081] The first air transmission structure is close to the combustion plate 20 side. In the first air transmission structure, the second air transmission channel 3054 is inclined from the first air transmission channel 3053 towards the ignition outlet 308-a;

[0082] The third air transmission structure is close to the outer wall 316-c side of the outer fire cover 30. The third air transmission structure includes two second air transmission channels 3054. One second air transmission channel 3054 is vertically arranged between the fire transmission channel and the first air transmission channel 3053, and the other second air transmission channel 3054 is inclined from the first air transmission channel 3053 towards the ignition outlet 308, further improving the rate of the gas filling the fire transmission channel.

[0083] The second gas transmission structure is located between the first gas transmission structure and the third gas transmission structure, and the second gas transmission channel 3054 is vertically arranged.

[0084] A gas transmission method for an ignition device of a burner: The outer fire cover 30 and the fire cover seat cooperate to form an outer ring air flow channel, and the combustion plate 20 cooperates with the outer fire cover 30 to form an inner ring air flow channel below the combustion plate 20. Gas reaches the outer wall 316-c of the combustion plate 20 and the outer fire cover 30 through the inner ring air flow channel and the outer ring air flow channel respectively; before the gas reaches the outer wall 316-c of the combustion plate 20 and the outer fire cover 30 through the inner ring air flow channel and the outer ring air flow channel, part of the gas is diverted to the ignition part 305. When the gas entering the ignition part 305 passes through the first cavity 3055, the gas transmission structure and the ignition channel, the flow rate of the gas is gradually slowed down, and is respectively transmitted to the outer wall 316-c of the combustion plate 20 and the outer fire cover 30 through the fire transmission channel, and is mixed with the gas reaching the outer wall 316-c of the combustion plate 20 and the outer fire cover 30 by the inner ring air flow and the outer ring air flow. When the ignition device of the burner ignites, the flame ignites the gas on the outer wall 316-c of the combustion plate 20 and the outer fire cover 30 through the fire transmission channel.

[0085] As Figure 2 shown, in the ignition device of the burner in this embodiment, the inner wall of the outer fire cover 30 of the burner is provided with a combustion plate 20 at intervals; in addition to the ignition part 305, an ignition needle 90 is also provided between the combustion plate 20 and the outer fire cover 30; an ignition hole 3057 is opened on the side wall of the ignition part 305 adjacent to the ignition needle 90, and the ignition end of the ignition needle 90 is arranged opposite to the ignition hole 3057; the ignition part 305 transmits gas to the outer walls of the combustion plate 20 and the outer fire cover 30 through the fire transmission channel, and transmits gas to the ignition hole 3057 through the first ignition channel; when the ignition device ignites, the ignition end of the ignition needle 90 ignites the ignition hole 3057, and the flame is respectively transmitted to the outer walls 316-c of the combustion plate 20 and the outer fire cover 30 through the fire transmission channel.

[0086] Further, as a specific implementation manner of this embodiment, two ignition holes 3057 are opened on the side wall of the ignition part 305 adjacent to the ignition needle, and the two ignition holes 3057 are arranged in sequence in the axial direction of the outer fire cover 30, and the discharge end of the ignition needle 90 is arranged between the two ignition holes 3057 to increase the gas content at the ignition end and ensure the ignition success rate of the ignition device.

[0087] Furthermore, a gas transmission structure is provided at the lower end of the flame transmission channel. The gas transmission structure provides gas for the first ignition channel and the flame transmission channel and the ignition hole 3057 at least through the gas outlet. The cross-section of the gas outlet of the gas transmission structure is different from that of the ignition hole 3057, and the gas outlet is inclined towards the ignition inlet 308-a so that the gas can reach the combustion plate 20 faster. The ignition hole 3057 is provided on the side wall of the ignition inlet 308-a of the flame transmission channel, and the height of the ignition hole 3057 is lower than the set height of the ignition inlet 308-a.

[0088] Furthermore, the side wall where the ignition inlet 308-a and the ignition hole 3057 are located is communicated through an ignition groove 3051, and the set position of the ignition groove 3051 is higher than the set position of the ignition hole 3057. When the ignition device ignites, the ignition end of the ignition needle 90 ignites the gas at the ignition hole 3057 to form a flame, and the flame is transmitted to the ignition channel through the ignition groove 3051 to ignite the gas in the ignition channel, and then the outer wall 316-c of the combustion plate 20 and the outer fire cover 30 is ignited through the ignition inlet 308-a and the ignition outlet 308 of the ignition channel, thereby realizing the ignition of the burner.

[0089] Furthermore, a small hole 3051-a is provided on the lower wall of the ignition groove 3051. The gas transmission structure provides gas for the small hole 3051-a in the groove through the second ignition channel, and the gas fills the ignition groove through the small hole 3051-a so that when the ignition device ignites, the flame of the ignition hole 3057 can be transmitted to the flame transmission channel through the ignition groove faster, improving the flame transmission efficiency of the burner.

[0090] Furthermore, the gas transmission structure includes a first gas transmission channel 3054 and a second gas transmission channel 3053 that are connected in sequence. The second gas transmission channel 3053 is located at the upper end of the first gas transmission channel 3054 and is communicated with the flame transmission channel through the gas outlet. The gas enters the second gas transmission channel 3053, the first ignition channel, and the second ignition channel respectively from the first gas transmission channel 3054 to communicate with the flame transmission channel, the ignition hole 3057, and the small hole 3051-a in the groove. After the gas in the first gas transmission channel 3054 is split by the second gas transmission channel 3053, the first ignition channel, and the second ignition channel, while the flow velocity is reduced, it is dispersed to multiple positions, improving the ignition stability of the ignition device.

[0091] As a specific implementation manner of this embodiment, the depth of the ignition groove 3051 on the side close to the ignition needle 90 is deeper than that on the side close to the flame transmission channel. After the gas fills the ignition groove 3051 through the small hole 3051-a in the groove, the opening on the side close to the ignition needle 90 is larger than the opening on the side of the flame transmission channel, and more gas overflows towards the ignition needle 90 so that after the ignition needle 90 ignites the ignition hole 3057, the flame can be quickly transmitted from the ignition groove 3051 to the flame transmission channel, improving the flame transmission efficiency of the burner.

[0092] Further, the height of the ignition groove 3051 near the combustion plate 20 is flush with the top end of the combustion plate 20; since the ignition groove 3051 is communicated with the ignition inlet 308-a, and the fire transfer channel includes a fire outlet inclined towards the ignition inlet 308-a, the gas in the fire outlet is mixed with the gas in the ignition groove 3051. When the flame is transferred out from the fire transfer groove, the combustion plate 20 can be ignited, thereby improving the ignition efficiency of the combustion plate 20.

[0093] Further, the height of the ignition groove 3051 at the end close to the combustion plate 20 is higher than the height of the ignition groove 3051 away from the combustion plate 20. After the gas in the small holes 3051-a in the groove fills the ignition groove 3051, the gas will be mixed with the gas overflowing from the combustion plate 20 along the higher setting mode of the fire transfer groove close to the combustion plate, thereby further improving the ignition efficiency of the combustion plate 20.

[0094] Further, the gas transmission structure provides gas for the fire transfer channel through a plurality of gas outlets, ensuring that the gas can quickly fill the fire transfer channel, and then transmitting the gas to the combustion plate 20 and the outer wall of the outer fire cap 30 through the ignition inlet 308-a and the ignition outlet 308 respectively; the plurality of gas outlets can be realized by arranging a plurality of second gas channels 3053 on a first gas channel 3054, or by arranging a plurality of gas transmission structures, and can be flexibly set according to the actual distance between the combustion plate 20 and the outer wall 307 of the outer fire cap 30.

[0095] As a specific implementation manner of this embodiment, there are three gas transmission structures between the fire transfer channel and the first cavity 3055;

[0096] The first gas transmission structure is close to the combustion plate 20. In the first gas transmission structure, the second gas channel 3054 is inclined from the first gas channel 3053 towards the ignition outlet 308-a;

[0097] The third gas transmission structure is close to the outer wall 316-c of the outer fire cap 30. The third gas transmission structure includes two second gas channels 3054. One second gas channel 3054 is vertically arranged between the fire transfer channel and the first gas channel 3053, and the other second gas channel 3054 is inclined from the first gas channel 3053 towards the ignition outlet 308, further improving the rate of filling the fire transfer channel with gas.

[0098] The second gas transmission structure is located between the first gas transmission structure and the third gas transmission structure, and the second gas channel 3054 is vertically arranged.

[0099] Both the first ignition channel and the second ignition channel are located in the first fire transfer channel close to the inner side of the outer fire cap 30.

[0100] Further, for the ignition device of a burner described in this embodiment, the ignition method is as follows:

[0101] The ignition end of the ignition needle 90 ignites the gas coming out of the ignition hole 3057 into a flame, and the flame ignites the gas overflowing from the ignition groove 3051. Subsequently, as the ignition groove 3051 is ignited, the fire transfer channel and the combustion plate 20 are ignited, and the flame in the fire transfer channel is transmitted from the ignition outlet 308 to the outer wall 316-c of the outer fire cover 30.

[0102] As Figure 3 As shown, in the ignition device of the burner in this embodiment, the inner wall of the outer fire cover 30 of the burner is provided with a combustion plate 20 at intervals; in addition to the ignition part 305 between the combustion plate 20 and the outer fire cover 30, an ignition needle 90 is also provided; an ignition hole 3057 is opened on the side wall of the ignition part 305 adjacent to the ignition needle 90, and the ignition end of the ignition needle 90 is arranged opposite to the ignition hole 3057; the ignition part 305 transmits gas to the combustion plate 20 and the outer wall of the outer fire cover 30 through the fire transfer channel through the ignition inlet 308-a and the ignition outlet 308 respectively, and transmits gas to the ignition hole 3057 through the first ignition channel; when the ignition device ignites, the ignition end of the ignition needle 90 ignites the ignition hole 3057, and the flame is transmitted to the combustion plate 20 and the outer wall 316-c of the outer fire cover 30 through the fire transfer channel respectively; an outlet hole 3084 is arranged on the outer wall 316-c of the outer fire cover 30, and the outlet hole 3084 provides gas through the outer ring air flow. The ignition outlet 308 of the fire transfer channel is communicated with the outlet hole 3084. After the ignition device ignites, the flame is transmitted from the ignition outlet 308 to the outer wall 316-c of the outer fire cover 30.

[0103] Furthermore, a flame stabilizing hole 3083 is opened below the ignition outlet 308, and the diameter of the flame stabilizing hole 3083 is smaller than that of the ignition outlet 308. The flame stabilizing hole 3083 is opened on the ignition part 305 or the outer wall 316-c of the outer fire cover 30;

[0104] The difference is that when the flame stabilizing hole 3083 is opened in the ignition part 3053, a first flame stabilizing channel is arranged in the ignition part 305 to provide gas for the flame stabilizing hole 3083;

[0105] When the flame stabilizing hole 3083 is opened on the outer wall 316-c of the outer fire cover 30, the outer ring air flow provides gas for the flame stabilizing hole 3083.

[0106] It should be noted that the ignition part 305 can be integrated with the outer fire cover 30. In addition to this situation, the ignition part 305 can also be separately installed with the outer fire cover 30. When the ignition part 305 is installed in place on the outer wall of the outer fire cover, the end of the ignition part 305 provided with the ignition outlet 308 serves as a part of the outer wall 316-c of the outer fire cover 305. (Hereafter, it is assumed that the flame stabilizing hole is opened on the outer wall 316-c of the outer fire cover 30 and will not be described again)

[0107] Furthermore, a thermocouple 80 is provided at the ignition outlet 308 and the fire stabilizing hole 3083 on the outer wall 316 - c of the external fire cover 30 . After the ignition device ignites the burner, the flames of the ignition outlet 308 and the fire stabilizing hole 3083 continue to burn the thermocouple 80 .

[0108] It should be noted that the thermocouple 80 is used to determine whether the burner is burning stably after the burner is ignited. The thermocouple 80 is usually installed at the ignition position of the burner. When the burner overflows, if the overflow is too large, the flame burning the thermocouple 80 will be extinguished. After the thermocouple 80 is burned without flame, the solenoid valve will be closed to prevent the burner from overflowing.

[0109] Furthermore, two fire stabilizing holes 3083 are provided at the lower end of the ignition outlet 308 and are arranged along the circumference of the outer fire cover 30. The thermocouple 80 is arranged between the two fire stabilizing holes 3083 and is arranged opposite to the ignition outlet 308. When the burner is ignited by the ignition device, the flames of the two fire stabilizing holes 3083 and the ignition outlet 308 burn the thermocouple 80 at the same time.

[0110] Furthermore, the ignition outlet 308 and the fire stabilizing hole 3083 are arranged on the outer wall of the outer fire cover 30, and the part as a whole is recessed toward the inner wall of the outer fire cover 30 to form a U-shaped groove 3081. The thermocouple 80 and the U-shaped groove 3081 are arranged relative to each other. When the burner is ignited by the ignition device, the flame of the entire U-shaped groove continues to burn the thermocouple. Since the U-shaped groove is recessed toward the inner wall of the outer fire cover 30 as a whole, the gas overflowing from the ignition outlet 308 and the fire stabilizing hole 3083 is more quickly mixed with the gas overflowing from the fire outlet 3084 close to the U-shaped groove, thereby improving the efficiency of the ignition outlet 308 in transferring the flame to the fire outlet 3084.

[0111] Furthermore, a fire transfer groove 3082 is provided on the outer wall of the external fire cover 30; the fire transfer groove 3082 connects the ignition outlet 308 and the fire outlet hole 3084 which is closest to the ignition outlet 308. When the ignition device ignites, the flame transmitted from the fire transfer device to the ignition outlet is transmitted to the fire outlet hole 3084 through the fire transfer groove 3082, thereby further improving the fire transfer efficiency of the outer wall 307 of the external fire cover 30.

[0112] Further, the outer wall 316-c of the outer fire cap 30 includes two layers of first fire holes 3084-a and second fire holes 3084-b arranged in a staggered manner; the fire transfer groove 3082 communicates with the ignition outlet 308 and the second fire hole 3084-b closest to the ignition outlet 308. After the ignition device ignites the fire, the flame is transmitted from the fire transfer groove 3082 to the second fire hole 3084-b. Since the first fire holes 3084-a and the second fire holes 3084-b are arranged in a staggered manner on the outer fire cap 30, the distance between the fire holes 3084 is reduced. While increasing the combustion intensity of the outer wall 316-c of the outer fire cap 30, the flame transmission speed on the outer wall 316-c of the outer fire cap 30 is further increased.

[0113] Further, after the fire transfer groove 3082 communicates with the second fire hole 3084-b near the ignition outlet 308, it continues to extend to the outer wall 316-c of the outer fire cap 20 between two second fire holes 3084-b, close to the first fire hole 3084-a. And for the fire transfer groove 3082 between two second fire holes 3084-b, the farther it is from the second fire hole 3084-b near the ignition outlet 308, the shallower the depth of the fire transfer groove 3082, enhancing the fire transfer efficiency of the second fire hole to transmit the flame to the first fire hole 3084-a.

[0114] Further, for the ignition device of a burner described in this embodiment, its ignition method is as follows:

[0115] The ignition end of the ignition needle 90 ignites the gas coming out of the ignition hole 3057 into a flame, and the flame ignites the gas overflowing from the fire transfer groove 3082. Subsequently, along with the fire transfer groove 3082, the fire transfer passage and the combustion plate 20 are ignited. The flame in the fire transfer passage is transmitted from the ignition outlet 308 to the fire transfer groove 3082. After the flame ignites the second fire hole 3084-b near the ignition outlet 308 through the fire transfer groove 3082, it continues to ignite the first fire hole 3084-a near the second fire hole 3084-b along the fire transfer groove 3082. Subsequently, the flame is transmitted to the entire outer wall 316-c of the outer fire cap 30.

[0116] This embodiment provides a burner, as Figures 4 to 11 shown, including an outer fire cap 30 and a fire cap base 40. The lower surface of the outer fire cap 30 and the upper surface of the fire cap base 40 define an outer ring air flow channel 702. The outer wall 316-c of the outer fire cap 30 is a vertical ring surface, and upper and lower two circles of fire holes 3084 communicating with the outer ring air flow channel 702 are respectively arranged at intervals on the outer wall 316-c of the outer fire cap 30. The axes of each circle of fire holes 3084 are respectively arranged at different angles with respect to the radius of the outer fire cap 30.

[0117] The present invention is provided with fire outlet holes 3084 at intervals on the outer fire cover 30, making the distribution of gas more uniform when burning on the outer fire cover 30, which is beneficial to fully heating the pot body. At the same time, the flame length can be shortened to prevent burning the claws of the pot support and causing high smoke.

[0118] It should be noted that the gas is divided into an inner ring air flow and an outer ring air flow. The inner ring air flow enters the burner plate 20 through the inner ring air flow channel below the burner plate 20 (the gas refers to the mixed gas of primary air and gas); the inside of the outer fire cover 30 includes a channel for the outer ring air flow to pass through. The outer ring air flow reaches the outer wall 316-c of the outer fire cover 30 through the channel. It should be noted that the outer wall 316-c of the outer fire cover 30 includes a circle of fire outlet holes 3084 arranged around the outer wall 316-c, and the outer ring air flow reaches the fire outlet holes 3084 from the cavity.

[0119] In this embodiment, the fire outlet holes 3084 include a first fire outlet hole 3084-a and a second fire outlet hole 3084-b which are distributed above and below the outer wall 316-c of the outer fire cover 30. The first fire outlet hole 3084-a is arranged close to the upper edge of the outer fire cover 30, and the first fire outlet hole 3084-a is inclined towards the fire cover base 40, communicating the outer ring air flow channel 702 with the outside.

[0120] Specifically, the fire outlet end of the first fire outlet hole 3084-a is arranged on the outer wall 316-c close to the outside. An outer ring air flow channel 702 is defined between the lower surface of the outer fire cover 30 and the upper surface of the fire cover base 40. The intake end is arranged on the upper surface of the outer ring air flow channel 702. That is to say, one end of the first fire outlet hole 3084-a is connected to the outer ring air flow channel 702, and the other end is connected to the outside. And it is arranged close to the upper edge of the outer fire cover 30, and the intake end of the first fire outlet hole 3084-a is arranged inside the outer fire cover 30.

[0121] It is worth noting that the first fire outlet hole 3084-a is inclined from the intake end side to the fire outlet end side. The gas flows upward along the first fire outlet hole 3084-a from the intake end to the fire outlet end, converting into a flame to provide heat. There is a height difference between the intake end and the fire outlet end, and the height of the intake end is less than the height of the fire outlet end, so that the gas in the outer ring air flow channel 702 can better fill the first fire outlet hole 3084-a along the intake end, improving the combustion efficiency of the burner and meeting the user's needs.

[0122] In this embodiment, the axis of the first flame outlet hole 3084-a forms an angle greater than 90 degrees and less than or equal to 180 degrees with the radial direction of the outer fire cover 30. It can also be understood that the first flame outlet hole 3084-a is inclined towards the fire cover base 40. The first flame outlet hole 3084-a penetrates through the outer ring air flow channel 702 and the outside world obliquely. The flame of the burner emerges from the first flame outlet hole 3084-a on the outer wall 316-c of the outer fire cover 30. That is to say, the angle at which the flame emerges from the outer wall 316-c is limited by the inclination angle of the first flame outlet hole 3084-a.

[0123] It should be noted that in this embodiment, the axis of the first flame outlet hole 3084-a forms an angle greater than 90 degrees and less than or equal to 180 degrees with the radial direction of the outer fire cover 30. Within this inclination angle range of the first flame outlet hole 3084-a, that is, the angle at which the flame emerges, it can better enhance the flame coverage area of the burner and further improve the combustion efficiency.

[0124] In this embodiment, the flame outlet hole 3084 further includes a second flame outlet hole 3084-b. The second flame outlet hole 3084-b is arranged below the first flame outlet hole 3084-a, and the second flame outlet hole 3084-b and the first flame outlet hole 3084-a are arranged staggeredly. In other words, there are two circles of flame outlet holes 3084, the upper circle is the first flame outlet hole 3084-a, and the lower circle is the second flame outlet hole 3084-b, which are arranged at intervals, making the distribution of the gas more uniform when burning on the outer fire cover 30 and facilitating the full heating of the pot body.

[0125] Furthermore, the second flame outlet hole 3084-b is communicated with the outer ring air flow channel 702 through the second hole 3084-2. One end of the second hole 3084-2 is communicated with the second flame outlet hole 3084-b, and the other end opens into the outer ring air flow channel 702. The angle between the axes of the second flame outlet hole 3084-b and the second hole 3084-2 is an obtuse angle. The flame emerges from the second hole 3084-2 towards the second flame outlet hole 3084-b, and the flame length can be shortened in the second flame outlet hole 3084-b to prevent burning the pot support. The obtuse angle between them makes it easier for the flame to emerge from the second flame outlet hole 3084-b after shortening the length, ensuring the heating effect.

[0126] In this embodiment, the angle between the axis of the first flame outlet hole 3084-a and the radial direction of the outer fire cover 30 in the clockwise direction is smaller than the angle between the axis of the first flame outlet hole 3084-a and the radial direction of the outer fire cover 30 in the counterclockwise direction. The angle between the second flame outlet hole 3084-b and the radial direction of the outer fire cover 30 in the clockwise direction is larger than the angle between the second flame outlet hole 3084-b and the radial direction of the outer fire cover 30 in the counterclockwise direction. The first flame outlet hole 3084-a and the second flame outlet hole 3084-b face different directions respectively, making the flame more uniform and conducive to fully heating the pot body. There is a height difference between the end of the second flame outlet hole 3084-b connected to the outside and the bottom surface of the second flame outlet hole 3084-b. The height of the end of the second flame outlet hole 3084-b connected to the outside is less than the height of the bottom surface of the second flame outlet hole 3084-b. At the same time, the second flame outlet hole 3084-b is inclined from the end close to the outside towards the bottom surface of the first flame outlet hole 3084-a.

[0127] It should be noted that the second flame outlet hole 3084-b is inclined towards the upper surface of the outer fire cover 30. One end of the second flame outlet hole 3084-b is connected to the outside, and a collecting part 3084-3 is arranged at the other end. The flame emitted by the burner is deflected and emitted below the outer fire cover 30 under the guidance of the second flame outlet hole 3084-b, making the distribution of the gas more uniform when burning on the outer fire cover 30 and preventing the pot support claws from being burned and causing high smoke.

[0128] In this embodiment, the first flame outlet hole 3084-a and the second flame outlet hole 3084-b are not 180 degrees at the same time.

[0129] It should be noted that the first flame outlet hole 3084-a and the second flame outlet hole 3084-b are inclined in different directions respectively. This setting method enables each flame outlet hole to generate airflows in different directions, can achieve more uniform combustion and higher combustion efficiency, and at the same time enhances the flame coverage area of the burner, further improving the combustion efficiency.

[0130] In this embodiment, a collecting part 3084-3 is formed by the bottom of the first hole 3084-1 being recessed towards the upper surface of the outer fire cover 30, and the surface of the collecting part 3084-3 is a conical surface.

[0131] Specifically, a collecting part 3084-3 is arranged opposite to the end of the second flame outlet hole 3084-b communicating with the outside. The collecting part is recessed towards the side away from the outside along the axis direction of the second flame outlet hole 3084-b to form a recessed space. The upper surface of the collecting part 3084-3 is a conical surface, which is more conducive to collecting the flame.

[0132] In this embodiment, a first annular wall 314 is inclined radially outward on the upper surface of the outer fire cover 30, and a second annular wall 309 inclined radially outward and connected to the first annular wall 314 is provided. A thick wall is formed between the second annular wall 309 and the outer wall 316-c, and a first fire outlet hole 3084-a, a second fire outlet hole 3084-b and a second hole 3084-2 are formed in the thick wall. The inner outlet of the first fire outlet hole 3084-a is formed on the annular surface 316-1. The annular surface 316-1 is at the top of the outer annular gas flow channel 702, and the inclined annular surface 316-1 is an inclined surface. Such a design enables the gas in the outer annular gas flow channel 702 to more conveniently reach the first fire outlet hole 3084-a, and the flame emitted from the outer fire cover 30 is more stable.

[0133] Further, a first annular wall 314 and a second annular wall 309 are provided on the upper surface of the outer fire cover 30. The first annular wall 314 is inclined from the side close to the burner plate 20 to the edge of the outer fire cover 30 on the upper surface of the outer fire cover 30, and the second annular wall 309 is inclined from a position away from the first annular wall 314 towards the edge of the outer fire cover 30 on the upper surface of the outer fire cover 30. The included angle between the first annular wall 314 and the horizontal plane is smaller than the included angle between the second annular wall 309 and the horizontal plane.

[0134] In this embodiment, the lower part of the inclined annular surface 316-1 is connected to the bent surface 316-3 of the outer fire cover 30 through a smooth transition part 316-2. The angle between the smooth transition part 316-2 and the radial direction of the outer annular gas flow channel 702 is smaller than the angle of the inclined annular surface 316-1. The inner outlet of the second fire outlet hole 3084-b or the second hole 3084-2 is formed on the smooth transition part 316-2. There is a certain included angle between the smooth transition part 316-2 and the inclined annular surface 316-1 and they are not on the same inclined plane. When the gas in the outer annular gas flow channel 702 flows through, it respectively plays a guiding role for the gas, guiding the gas into the first fire outlet hole 3084-a or the second fire outlet hole 3084-b formed on their respective surfaces.

[0135] An inclined annular surface 316-1 connected to the first annular wall 314, a smooth transition part 316-2 connected to the inclined annular surface 316-1 and a bent surface 316-3 connected to the outer wall 316-c are provided above the outer annular gas flow channel 702. One end of the first fire outlet hole 3084-a is communicated with the outer wall 316-c, and the other end is communicated with the inclined annular surface 316-1.

[0136] In this embodiment, the outer ring air flow channel 702 formed by the insertion connection of the outer fire cap 30 and the fire cap seat 40 is a variable cross-section channel. A secondary air channel is formed in the outer ring air flow channel, and a side ring wall 304-1 is arranged outside the secondary air channel. The side ring surface 316-4 outside the outer ring air flow channel 702 is parallel to the inner ring surface 316-5, and the distance between the side ring surface 316-4 and the side ring wall 304-1 is less than the distance between the inner ring surface 316-5 and the side ring wall 304-1. The distance between the smooth transition part 316-2 and the side ring wall 304-1 is greater than the distance between the inclined ring surface 316-1 and the side ring wall 304-1. The outer ring air flow channel 702 changes its diameter four times in the height direction, and the distance of the outer ring air flow channel 702 gradually decreases in the height direction. The gas is pressurized by the reduction of the space, so that the gas flow rate becomes larger. It can also be understood that the flow rate of the gas at the inner outlet of the first fire outlet hole 3084-a becomes larger, timely supplementing the gas to ensure the stable combustion of the fire outlet flame and ensuring the combustion efficiency.

[0137] In this embodiment, the upper end of the inclined ring surface 316-1 is connected to the side ring wall 304-1 of the secondary air channel through the inclined surface 316-6. The radial angle between the inclined surface 316-6 and the outer ring air flow channel 702 is less than 90 degrees in the counterclockwise direction. The upper part of the outer ring air flow channel 702 is inclined towards the fire outlet hole 3084. The gas is guided by the inclined surface 316-6 to ensure the stable combustion of the fire outlet flame, thereby ensuring the combustion efficiency. The aperture of the second fire outlet hole 3084-b is larger than the aperture of the second hole 3084-2. The fire outlet area is increased through the second fire outlet hole 3084-b, ensuring the combustion efficiency. The second fire outlet hole 3084-b is communicated with the outer ring air flow channel 702 through the second hole 3084-2, and one end of the second hole 3084-2 is communicated with the smooth transition part 316-2.

[0138] In this embodiment, the second fire outlet hole 3084-b is communicated with a second hole 3084-2. The second hole 3084-2 is inclined from the lower surface of the first hole 3084-1 towards the lower bottom surface of the outer fire cap 30, communicating the second fire outlet hole 3084-b and the outer ring air flow channel 702.

[0139] Furthermore, the second fire outlet hole 3084-b is communicated with the outer ring air flow channel 702 through the second hole 3084-2, and the gas flows towards the second fire outlet hole 3084-b through the second hole 3084-2.

[0140] It should be noted that the intake end of the second hole 3084-2 is arranged on the upper surface of the outer ring air flow channel 702, and the outlet end of the second hole 3084-2 is arranged in the first hole 3084-1. At the same time, the height of the intake end of the second hole 3084-2 is less than the height of the outlet end of the second hole 3084-2, so that the gas can flow upward more conveniently and then fill the second fire outlet hole 3084-b.

[0141] Further, the gas outlet end of the second flame outlet hole 3084-b is arranged on the bottom surface of the second flame outlet hole 3084-b, and is arranged close to one side of the gathering part 3084-3 at the same time, so as to better gather the flame in the second flame outlet hole 3084-b, and then emerge from the first hole 3084-1.

[0142] In this embodiment, the aperture of the second flame outlet hole 3084-b is larger than that of the second hole 3084-2, and the second hole 3084-2 communicates the first hole 3084-1 with the outer ring air flow channel 702.

[0143] Further, the gas passes from the outer ring air flow channel 702 through the second hole 3084-2 and enters the first hole 3084-1. After ignition, the flame of the second hole 3084-2 rushes into the second flame outlet hole 3084-b, and after being blocked by the second flame outlet hole 3084-b, it emerges to the outside.

[0144] In this embodiment, the included angle between the axes of the second flame outlet hole 3084-b and the second hole 3084-2 is an obtuse angle.

[0145] In this embodiment, the outer periphery of the outer fire cap 30 is set as a vertical annular surface which is the outer wall 316-c. The upper surface of the outer fire cap 30 is inclined from the side close to the burner plate 20 to the edge of the outer fire cap 30 to form a first annular wall 314. The air outlet 304-a of the secondary air channel is arranged on the first annular wall 314. The ignition part 305 is arranged in any one of the air outlets 304-a, and divides the air outlet 304-a into a first air outlet 405 and a second air outlet 406. The ignition needle 90 is arranged in the first air outlet 405.

[0146] In this embodiment, a part of the first flame outlet hole 3084-a is set as a stepped hole, or is arranged as a stepped hole at intervals. Specifically, the aperture of the first flame outlet hole 3084-a becomes smaller at the end facing the outer ring air flow channel 702, and the aperture of the first flame outlet hole 3084-a becomes larger at the end facing the outside. The first flame outlet hole 3084-a communicates with the outer ring air flow channel 702 through the first hole 3084-1. The axis of the first hole 3084-1 is parallel to the axis of the first flame outlet hole 3084-a. At the connection of the first hole 3084-1 and the first flame outlet hole 3084-a, the bottom of the first flame outlet hole 3084-a is a conical surface, which is convenient for guiding the flame, making the flame emerge more easily, ensuring the combustion efficiency, and the first hole 3084-1 points to the outer ring air flow channel 702 in the radial direction. The gas is pressurized to the first hole 3084-1, and the flow rate increases, ensuring the combustion efficiency. The flame emerges from the first hole 3084-1 to the first flame outlet hole 3084-a. Due to the increase in aperture, the flame length is shortened, preventing the burner support claws from being burned.

[0147] Preferably, a first fire outlet hole 3084-a and a first hole 3084-1 are respectively formed in the outer wall 316-c of the outer fire cap 30 at the connection between the high-transparency plate 10 and the outer fire cap 30. The position of the first fire outlet hole 3084-a corresponds to the pawl of the pot support. The first fire outlet hole 3084-a is set as a stepped hole, that is, one end connected to the outer ring air flow channel 702 is set as the first hole 3084-1, and the aperture of the first hole 3084-1 is smaller than that of the first fire outlet hole 3084-a. The stepped hole is provided to prevent the pawl of the pot support from being burned and causing high smoke.

[0148] For the sake of description, Figure 10 The arrow in the figure indicates the flow direction of the smoke in the smoke exhaust passage.

[0149] In this embodiment, a smoke exhaust passage is formed between the upper cover (including a high-transparency plate 10 and an annular support plate 102 for fixing the high-transparency plate 10), the outer fire cap 10, and the combustion plate 20. The smoke exhaust passage communicates the combustion plate 20 with the outside, so that the smoke generated by the combustion plate 20 can flow to the outside, reducing the resistance at the combustion plate 20, thereby facilitating the gas supply speed and supply amount of the combustion plate 20, improving the thermal efficiency of the combustion plate 20, and ensuring the combustion effect.

[0150] It should be noted that the smoke exhaust passage is the gap between the upper cover and the outer fire cap 30 formed by connecting several columns and the passage between the columns. The high-temperature smoke flows out of the outside along the smoke exhaust passage from the combustion plate 20.

[0151] In this way, the smoke generated by the combustion of the combustion plate 20 can flow out of the burner, reducing the combustion resistance of the combustion plate 20, thereby ensuring the amount of primary air entrained by the combustion plate 20, ensuring sufficient combustion of the combustion plate 20, and further ensuring that the combustion plate 20 can emit infrared rays.

[0152] In this embodiment, the high-transparency plate 10 is covered above the outer fire cap 30 at a certain interval. It can also be understood that the high-transparency plate 10 is covered above the combustion plate 20 at a certain interval. The heat of the combustion plate 20 can pass through the high-transparency plate 10 and be transferred to the bottom of the pot. That is to say, the high-transparency plate 10 will not affect the heating effect of the combustion plate 20, or has a small impact on the heating effect of the combustion plate 20, so as to ensure the combustion effect of the burner.

[0153] At the same time, the high-transparency plate 10 can block above the combustion plate 20. Since the combustion plate 20 is made of porous material, the high-transparency plate 10 can prevent the soup, impurities, etc. generated by overflowing the pot from flowing onto the combustion plate 20 and causing blockage of the combustion plate 20, so as to ensure the stable combustion of the combustion plate 20 and further ensure the stable combustion of the entire burner.

[0154] The diameter of the support plate 102 is slightly larger than that of the outer burner cap 30. High-temperature flue gas flows from the smoke exhaust passage to the upper part of the outer burner cap 30 and then flows out to the outside. The outer edge of the support plate 102 slopes downward, which can gather the high-temperature flue gas above the outer burner cap 30. The flame emitted from the outer burner cap 30 burns again, making the combustion more complete.

[0155] In this embodiment, the high-temperature flue gas discharged from the smoke exhaust passage can also flow upward to the bottom of the pot and continue to convect and exchange heat with the bottom of the pot, improving the thermal efficiency of the burner. In addition, the flue gas generated by the combustion plate 20 can flow out through the smoke exhaust passage, and the secondary air can flow to the combustion plate 20, thereby improving the combustion efficiency of the combustion plate 20.

[0156] In this embodiment, the fire outlet holes 3084 are arranged below the smoke exhaust passage. When the high-temperature flue gas flows out of the smoke exhaust passage and passes through the gap above the outer burner cap 30, the flame emitted from the fire outlet holes 3084 burns the high-temperature flue gas again.

[0157] It should be noted that the high-temperature flue gas flows from the smoke exhaust passage to the upper part of the outer burner cap 30 and then flows out to the outside. The high-temperature flue gas is gathered above the outer burner cap 30, and the flame emitted from the outer burner cap 30 burns again, making the combustion more complete. In addition, the high-temperature flue gas discharged from the smoke exhaust passage can also flow upward to the bottom of the pot and continue to convect and exchange heat with the bottom of the pot, improving the thermal efficiency of the burner. In addition, the flue gas generated by the combustion plate 20 can flow out through the smoke exhaust passage, and the secondary air can flow to the combustion plate 20, thereby improving the combustion efficiency of the combustion plate 20. The secondary air flows in from below the smoke exhaust passage to supplement the secondary air for the combustion plate, and at the same time exchanges heat with the high-temperature flue gas. The high-temperature flue gas follows the smoke exhaust passage, flows out through the gap above the outer burner cap 30, and is burned again by the flame emitted from the fire outlet holes 3084 provided on the outer burner cap 30, making the combustion more complete.

[0158] The above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content to be equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. An ignition device for a burner, characterized in that, it includes, a combustion plate (20) arranged at an interval from the inner wall of the outer fire cover (30), an ignition part (305) and an ignition needle (90) opposite thereto are arranged between the combustion plate (20) and the outer fire cover (30); The ignition part (305) includes a fire transfer channel connecting the combustion plate (20) and the outer wall (316-c) of the outer fire cover (30), and an ignition hole (3057) arranged on the side of the fire transfer channel close to the combustion plate (20); The flame of the ignition hole (3057) is transmitted to the combustion plate (20) and the outer wall (316-c) of the outer fire cover (30) through the fire transfer channel.

2. The ignition device for a burner according to claim 1, characterized in that, the ignition hole (3057) is arranged on the side wall of the ignition inlet (308-a) of the fire transfer channel; A gas transmission structure is arranged at the lower end of the fire transfer channel. The gas transmission structure provides gas for the fire transfer channel and the ignition hole (3057) through at least an air outlet and a first ignition channel respectively, and the cross-sectional areas of the air outlet and the ignition hole (3057) are different.

3. The ignition device for a burner according to claim 2, characterized in that, the ignition inlet (308-a) and the side wall where the ignition hole (3057) is located are connected through an ignition groove (3051); The setting position of the ignition groove (3051) is higher than the ignition hole (3057).

4. The ignition device for a burner according to claim 3, characterized in that, a small hole (3051-a) in the groove is opened on the side wall of the ignition groove (3051) close to the ignition hole; The gas transmission structure provides gas for the small hole (3051-a) in the groove through a second ignition channel.

5. The ignition device for a burner according to claim 2, characterized in that, the gas transmission structure is provided with one or more air outlets communicating with the fire transfer channel, and at least one air outlet is arranged at the bottom end of the fire transfer channel close to the ignition inlet (308-a).

6. The ignition device for a burner according to any one of claims 1-5, characterized in that, the gas transmission structure includes a first gas transmission channel (3054) and a second gas transmission channel (3053) connected in sequence; The second gas transmission channel (3053) is located at the upper end of the first gas transmission channel (3054) and is connected to the fire transfer channel through an air outlet; The gas enters the second gas transmission channel (3053), the first ignition channel and the second ignition channel respectively from the first gas transmission channel (3054) and is transmitted to the fire transfer channel, the ignition hole (3057) and the small hole (3051-a) in the groove.

7. The ignition device for a burner according to claim 6, characterized in that, a plurality of gas transmission structures are arranged below the fire transfer channel from the ignition inlet (308-a) to the ignition outlet (308); The gas inlets of the first ignition channel and the second ignition channel are located in the gas transmission structure close to the inner side of the outer fire cover (30).

8. The ignition device for a burner according to any one of claims 3 or 4, characterized in that, the depth of the ignition groove (3051) on the side close to the ignition needle (90) is deeper than that on the side close to the ignition inlet (308-a) of the fire transfer channel; The ignition groove (3051) is level with the top end of the combustion plate (20) at a height close to the combustion plate (20); and the height of the ignition groove (3051) at one end close to the combustion plate (20) is higher than the height of the ignition groove (3051) at the end far from the combustion plate (20).

9. An ignition device for a burner according to claim 2, characterized in that, two ignition holes (3057) are provided, and the two ignition holes (3057) are arranged in a cross with the ignition needle (90), and the discharge end of the ignition needle (90) is located between the two ignition holes (3057).

10. An ignition method applied to the ignition device of the burner according to any one of claims 1-9, characterized in that, the ignition end of the ignition needle (90) ignites the gas in the ignition hole (3057), the flame overflowing from the ignition hole (3057) ignites the gas overflowing from the small holes (3051-a) in the groove, and then the flame is transmitted to the ignition groove (3082), and the flame of the ignition groove (3082) is further transmitted to the fire transfer channel, and the flame is respectively transmitted to the combustion plate (20) and the ignition outlet (308) on the outer wall of the outer fire cover through the fire transfer channel.

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