Ignition device of combustor

Abstract

The invention discloses an ignition device of a combustor, the combustor comprises a combustion plate spaced from the inner wall of an outer fire cover, an ignition part is arranged between the combustion plate and the outer fire cover, and at least part of the ignition part extends into the inner wall of the outer fire cover; the ignition part comprises a fire transfer channel and a first cavity, and the fire transfer channel communicates with the combustion plate and the outer wall of the outer fire cover; and the first cavity is communicated with fuel gas, and is communicated with the inner cavity of the fire transfer channel through the gas transfer structure to transfer the fuel gas. According to the combustor ignition device, fuel gas is conveyed to the combustion plate and the outer wall of the outer fire cover through the fire transfer channel and the first cavity formed in the fire transfer part, the fuel gas flow speed is adjusted through the ignition part, and the fuel gas conveying efficiency and the ignition efficiency of the combustor ignition device are improved.

Description

Technical Field

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

[0002] A gas stove is a commonly used burner 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 the prior art, the invention patent with the publication number of CN 111780113 A discloses an outer fire cap and a gas stove. The outer fire cap includes a fire cap body, a fire transfer structure, and an adjusting part. The fire transfer structure is arranged on the fire cap body, and the adjusting part can move away from or close to the fire transfer structure. The adjusting part is used to adjust the size of the fire transfer groove of the outer ring fire cap. This solution realizes the adjustment of the size of the fire transfer groove of the outer ring fire cap by arranging the adjusting part and enabling the adjusting part to move away from or close to the fire transfer structure. Furthermore, it can adapt to different sizes of fire transfer grooves according to different gas flows, improve the stability and reliability of the flame in the fire transfer groove, and avoid the flame from extinguishing in the fire transfer groove. However, this solution ignores the problem of the change in gas flow velocity during the transmission process. Whether the gas flow velocity is too fast or too slow when reaching the outer fire cap and the inner fire cap, it will affect the ignition efficiency of the ignition device.

[0006] In view of this, the present invention is specifically proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide an ignition device for a burner. An ignition part is included between the outer fire cap of the burner and the combustion plate, and the ignition part performs multi-stage speed regulation on the gas and then distributes it to the outer fire cap and the combustion plate respectively.

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

[0009] An ignition device for a burner, characterized by including

[0010] A combustion plate arranged at an interval from the inner wall of the outer fire cap,

[0011] An ignition part is arranged between the combustion plate and the outer fire cap, and at least part of the ignition part extends into the inner wall of the outer fire cap;

[0012] The ignition part includes

[0013] A fire transfer channel that connects the combustion plate and the outer wall of the outer fire cover;

[0014] A first cavity is connected to the gas, and is connected to the inner cavity of the fire transfer channel through a gas transfer structure to transfer gas. The ignition part sends the gas to the combustion plate and the outer wall of the outer fire cover through the first cavity and the gas transfer structure, improving the ignition efficiency of the ignition device.

[0015] Optionally, the fire transfer channel includes an ignition inlet and an ignition outlet. The ignition inlet is located on the side of the fire transfer channel close to the combustion plate; the ignition outlet is arranged on the outer wall of the outer fire cover. The first cavity is arranged below the fire transfer channel and partially lower than the combustion plate. The ignition part diverts the gas sent to the combustion plate into the first cavity, and the gas entering the first cavity then enters the fire transfer channel through the gas transfer structure. The fire transfer channel diverts the gas to the combustion plate through the ignition inlet and diverts the gas to the outer wall of the outer fire cover through the ignition outlet.

[0016] Optionally, the first cavity is connected to the inner ring air flow channel that supplies gas to the combustion plate, and part of the gas is diverted to the first cavity by the inner ring air flow before entering the combustion plate;

[0017] Or the first cavity is connected to the inner ring air flow channel that supplies gas to the combustion plate and the outer ring air flow channel that supplies gas to the outer wall of the outer fire cover. Before the inner ring air flow and the outer ring air flow enter the combustion plate and the outer wall of the outer fire cover, part of the gas is diverted to the first cavity, and the air flow entering the first cavity is diverted to the combustion plate and the outer wall of the outer fire cover after passing through the fire transfer channel, ensuring sufficient gas for the combustion plate and the outer wall of the outer fire cover and improving the ignition efficiency of the ignition device.

[0018] Optionally, one end of the first cavity is close to the peripheral wall of the inner ring air flow channel and is connected to the inner ring air flow channel, and the gas directly enters the first cavity through the peripheral wall of the inner ring air flow channel, ensuring sufficient gas in the first cavity;

[0019] Optionally, the other end of the first cavity extends in the radial direction along the direction of the outer fire cover to the inner wall of the outer fire cover, or at least partially extends into the outer fire cover. When the other end of the first cavity extends to the inner wall of the outer fire cover, the inner wall of the outer fire cover serves as a part of the peripheral wall of the first cavity. When the first cavity at least partially extends into the outer fire cover, the first cavity serves as a part of the inner wall of the outer fire cover, and is adjusted according to the specific structure inside the burner to improve the applicability of the ignition part.

[0020] Optionally, the inner diameter of the inner ring air flow channel gradually increases in the direction close to the combustion plate to a trumpet shape;

[0021] The combustion plate is arranged at the trumpet opening of the inner ring airflow channel with the largest inner diameter. When the gas reaches the combustion plate through the inner ring airflow channel, the trumpet-shaped inner ring airflow channel can reduce the flow rate of the inner ring airflow when it reaches the combustion plate, thereby ensuring that the combustion plate fully burns the inner ring airflow.

[0022] The side wall of the inner ring airflow channel is connected to the first cavity through a through hole; when the gas reaches the combustion plate through the inner ring airflow channel, part of the gas will be blocked by the combustion plate and subjected to a force opposite to the air intake direction. Under the force, the gas enters the first cavity through the through holes set on the peripheral wall of the inner ring airflow channel.

[0023] Or the side wall of the inner ring airflow channel is connected to the first cavity through a through channel. When there is a gap between the first cavity and the inner ring airflow channel, the first cavity and the inner ring airflow channel are connected through the through channel. The connection method between the first cavity and the inner ring airflow channel is adjusted according to the actual situation of the burner to improve the applicability of the present invention.

[0024] Optionally, the opening height of the through hole or the through channel in the inner ring airflow channel is higher than the opening height in the first cavity. The gas diverted from the inner ring airflow channel to the first cavity is pressed into the first cavity in the opposite air intake direction after being blocked by the combustion plate. The through channel is set at a height higher than the opening height of the first cavity by the height close to the side wall of the trumpet. While conforming to the flow direction of the airflow, it can also buffer the airflow velocity and reduce the flow velocity of the gas after entering the first cavity, thereby improving the ignition stability of the ignition device.

[0025] Optionally, the gas transmission structure includes an air inlet and an air outlet connecting the first cavity and the fire transmission channel;

[0026] The air inlet is arranged at the upper end of the first cavity, and the air outlet is arranged at the lower end of the fire transmission channel;

[0027] The cross-sectional area of ​​the air inlet is larger than that of the air outlet. In the process of the gas entering the fire transfer channel from the first cavity, the cross-sectional area between the air inlet and the air outlet changes, so that the fire transfer channel can be quickly filled after entering the fire transfer channel, and further diverted to the combustion plate and the outer wall of the outer fire cover through the air inlet and air outlet of the fire transfer channel.

[0028] Optionally, the air transmission structure includes a first air transmission channel and a second air transmission channel;

[0029] The first gas transmission channel includes at least one second gas transmission channel. After the gas enters the first gas transmission channel, it is dispersed to various parts of the fire transmission channel through the second gas transmission channel, thereby improving the transmission efficiency of the gas.

[0030] The cross-sectional area of the first gas transmission channel is larger than that of the second gas transmission channel. The fuel gas entering the gas transmission structure is buffered by the first gas transmission channel and then enters the flame transmission channel through the second gas transmission channel, further slowing down the flow rate of the fuel gas entering the flame transmission channel and improving the ignition efficiency of the ignition device.

[0031] Optionally, the cross-sectional area of the upper end of the first gas transmission channel gradually contracts to form a gas transmission surface;

[0032] The second gas transmission channel is arranged on the gas transmission surface. The fuel gas in the first gas transmission channel will be buffered by the gas transmission surface before entering the second gas transmission channel, further reducing the flow rate of the fuel gas and improving the stability during the gas transmission process.

[0033] Optionally, there are three gas transmission structures between the flame transmission channel and the first cavity;

[0034] The second gas transmission channel in the gas transmission structure on the side of the combustion plate is inclined towards the ignition inlet;

[0035] The gas transmission structure on the outer wall side of the outer fire cover includes two second gas transmission channels. One second gas transmission channel is vertically arranged, and the other second gas transmission channel is inclined towards the ignition outlet, improving the efficiency of the gas transmission structure in transmitting air flow to the fire channel.

[0036] The second gas transmission channel in the gas transmission structure arranged in the middle is vertically arranged.

[0037] The present invention has at least the following beneficial effects:

[0038] 1. By arranging an ignition part between the combustion plate and the outer fire cover in the present invention, the ignition part includes a flame transmission channel connecting the combustion plate and the outer wall of the outer fire cover, and a first cavity communicated with the lower part of the flame transmission channel. Before the fuel gas enters the outer wall of the combustion plate and the outer fire cover, it reaches the flame transmission channel after passing through the first cavity, and then is respectively transmitted to the outer wall of the combustion plate and the outer wall of the outer fire cover through the flame transmission channel. Through the shunt connection of the fuel gas, the ignition efficiency and ignition stability of the ignition device are improved.

[0039] 2. The through-channel inclined between the first cavity and the inner ring air intake channel in the present invention is located below the combustion plate. When the fuel gas enters the combustion plate through the inner ring air flow channel, part of the fuel gas will be blocked by the combustion plate and pressed into the first cavity. The fuel gas then enters the flame transmission channel through the gas transmission channel and is shunted to the combustion plate. During this process, the flow rate of the fuel gas is adjusted to ensure the ignition success rate of the ignition device.

[0040] 3. The gas transmission channel of the present invention includes a first gas transmission airway and a second gas transmission airway, as well as a gas transmission surface formed between the first gas transmission airway and the second gas transmission airway. The second gas transmission airway is arranged above the gas transmission surface. During the process of the gas entering the flame transmission channel from the first cavity, the first gas transmission airway, the second gas transmission airway, and the gas transmission surface will further adjust the flow rate of the gas, thereby improving the stability of the gas filling the flame transmission channel and further enhancing the ignition stability of the ignition device. Description of the Drawings

[0041] 10. High-permeability 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 hole in the groove; 3052. Avoidance structure; 3053. First gas transmission airway; 3054. Second gas transmission airway; 3055. First cavity; 3057. Ignition hole; 315. Through hole; 308. Ignition outlet; 308-a. Ignition inlet; 3081. U-shaped groove; 3082. Flame transmission groove; 3083. Flame stabilization hole; 3084. Flame outlet hole; 3084-a. First flame outlet hole; 3084-b. Second flame outlet hole; 3084-1. First hole; 3084-2. Second hole; 3084-3. Collection part; 316-c. Outer wall; 316-1. Inclined ring surface; 316-2. Smooth transition part; 316-3. Bent surface; 316-4. Side ring surface; 316-5. Inner ring surface; 316-6. Inclined surface.

[0042] Figure 1 Schematic cross-sectional view of the burner according to the present invention

[0043] Figure 2 Schematic diagram of the ignition inlet according to the present invention;

[0044] Figure 3 Schematic diagram of the ignition outlet according to the present invention;

[0045] Figure 4 Schematic diagram of the cooperation between the combustion plate and the fire cover seat according to the present invention;

[0046] Figure 5 Schematic diagram of the structure of the flame outlet hole

[0047] Figure 6 is Figure 5 Cross-sectional view at A-A in

[0048] Figure 7 is Figure 5 Cross-sectional view at B-B in

[0049] Figure 8 is Figure 7 Partial enlarged view at C in

[0050] Figure 9It is a schematic structural diagram of the first hole;

[0051] Figure 10 It is a schematic structural diagram of the high-transparency plate;

[0052] Figure 11 It is Figure 10 a sectional schematic diagram of Detailed implementation manners

[0053] The exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Those skilled in the art can understand 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.

[0054] In the description of the present invention, unless otherwise clearly defined 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.

[0055] 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 to the present invention.

[0056] The burner of the present invention includes an inner fire cover and an outer fire cover 30. The outer fire cover 30 is integrally annular. The outer fire cover 30 is integrally installed on the fire cover seat and cooperates with the fire cover seat to form an inner ring air flow channel. The inner fire cover is coaxially and spacedly arranged inside the inner circle of the outer fire cover 30 (the inner fire cover in this application includes a combustion plate and will not be elaborated later). 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 a 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 later); 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.

[0057] Further, a high-transparency plate is provided above the combustion plate 20. When the user uses the burner, the heat generated by the combustion plate 20 passes through the high-transparency plate to reach the cooking pot, heating the bottom of the pot. Since the combustion plate 20 is made of a porous structure material, the presence of the high-transparency plate can prevent the soup, residue, etc. generated by over-boiling from flowing onto the combustion plate 20, 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.

[0058] 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 is installed in place with the outer fire cover 30, 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.

[0059] As Figure 1 As shown, 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 at 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 holes 3084 arranged around the outer wall 316-c are 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.

[0060] 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. The fire transfer channel at least partially extends into the outer fire cover 30 or extends to the outer wall 316-c of the outer fire cover 30.

[0061] Specifically, for 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 that reaches 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.

[0062] Further, during the process that the gas flows 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 the 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.

[0063] Further, the fire transfer channel includes an ignition inlet 308-a and an ignition outlet 308. The ignition inlet 308-a is at least partially oppositely arranged with the side wall of the combustion plate 20. The ignition inlet 308-a is at least partially higher than the top end of the combustion plate 20, and 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 to ignite the combustion plate 20. The ignition outlet 308 is arranged 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 outlet holes 3084 on the outer fire cover 30, thereby improving the efficiency of the ignition device to ignite the outer fire cover. Generally speaking, the diameter of the ignition outlet 308 is larger than the diameter of the fire outlet holes 3084, and the flame of the ignition outlet 308 extends from the fire outlet holes 3084 on both sides of the ignition outlet 308 to the outer wall 316-c of the outer fire cover 30.

[0064] As a specific implementation manner of this embodiment, after the outer burner cap 30 is properly installed on the burner cap base, the burner cap base serves as the bottom wall of the first cavity 3055, enabling the first cavity 3055 to form a closed cavity. 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 recessing from the lower edge where the outer burner cap 30 and the burner cap base are cooperatively installed in a direction away from the lower end. The first cavity 3055 is generally rectangular and is located below the flame transfer channel. The top of the first cavity 3055 is communicated with the flame transfer channel through a gas transfer structure; the first cavity 3055 can be provided with a bottom, or when the outer burner cap 30 and the burner cap base are properly installed, the first cavity 3055 cooperates with the upper surface of the base to achieve sealing. At this time, the burner cap base serves as the bottom of the first cavity 3055 to prevent leakage of the gas flowing into the first cavity 3055 and 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 channel.

[0065] Further, the first cavity 3055 is communicated with the lower end of the combustion plate 20 and the inner ring air flow channel 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.

[0066] Specifically, at one end of the first cavity 3055 close to the inner ring air flow channel, it is communicated with the peripheral wall of the inner ring air flow channel; at the end of the first cavity 3055 far from the inner ring air flow channel, it 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 at the end of the first cavity 3055 far from the inner ring air 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 far from the inner ring air flow channel, the cavity wall at the end of the first cavity 3055 far from the inner ring air flow channel serves as part of the inner wall of the outer burner cap 30.

[0067] As a specific implementation manner of this embodiment, at both ends of the first cavity 3055 in the radial direction of the outer burner cap 30, it is respectively close to the inner ring air flow channel and the outer ring air flow channel, so that before the inner ring air flow or the outer ring air flow reaches the combustion plate 20 or the outer wall 316 - c of the outer burner cap 30, the gas is diverted into the first cavity 2055; the first cavity 3055 can be selectively communicated with the inner ring air flow channel, or the first cavity 3055 can be communicated with both the inner ring air flow and the outer ring air flow.

[0068] As a specific implementation manner of this embodiment, when the cavity wall of the first cavity 3055 is a part of the peripheral wall of the inner-ring air flow channel, the first cavity 3055 is communicated with the inner-ring air flow channel through the through hole 315. When the gas passes through the inner-ring air flow channel, a part of the gas is diverted and enters the first cavity 3055 through the through hole 315, and then enters the flame transmission channel through the gas transmission structure, and then is respectively transmitted to the combustion plate 20 and the outer wall 316-c of the outer fire cover 30 through the ignition outlet 308-a and the ignition outlet 308.

[0069] As a specific implementation manner of this embodiment, when the cavity wall of the first cavity 3055 is arranged at an interval from the peripheral wall of the inner-ring air flow channel, the first cavity 3055 is communicated with the inner-ring air flow channel through the through channel, and the connection mode between the first cavity 3055 and the inner-ring air 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-ring air flow channel is communicated with the inner-ring air flow channel through the through hole or the through channel; the first cavity 3055 can be communicated with the inner-ring air flow through one through hole or through channel, or one through channel or one through hole can be provided to be communicated with both the inner-ring air flow and the outer-ring air flow at the same time, so as to ensure that enough gas enters the first cavity 3055, thereby improving the ignition stability of the ignition device.

[0070] As a specific implementation manner of this embodiment, the inner wall of the outer fire cover 30 forms an inner-ring air flow channel below the installation position of the combustion plate 20. The inner-ring air flow channel has an inner diameter that gradually increases in the direction of the outer fire cover 30 approaching the combustion plate 20. The inner-ring air flow channel is in a horn shape as a whole. When the gas passes through the horn-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.

[0071] Further, the combustion plate 20 is installed at the horn opening with the largest inner diameter of the inner-ring air flow inlet channel. Before the inner-ring air flow reaches the combustion plate 20, the flow rate is gradually reduced, so as to improve the combustion efficiency of the combustion plate 20.

[0072] As an implementation manner 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 the through channel. One end of the through channel communicated with the inner-ring air flow channel is the air inlet end, and the end communicated with the first cavity 3055 is the air outlet end.

[0073] Further, the air inlet 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 air inlet 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 air inlet direction of the inner ring air flow is formed. Due to the horn-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 air inlet end is arranged at the position where the inner diameter of the inner ring air flow channel is relatively large. At this time, the air inlet 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 horn-shaped setting of the inner ring air flow channel, the air flow affected by the blocking force acts on the peripheral wall of the inner ring air flow channel with a relatively large inner diameter and will not affect the subsequent inner ring air flow supplied.

[0074] Further, the air inlet end of the through-channel on the peripheral wall of the inner ring air flow channel is higher than the air outlet end on the cavity wall of the first cavity 3055, that is, the through-channel is inclined as a whole between the air inlet end and the air 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.

[0075] Further, a drainage structure is formed on the cavity wall of the first cavity 3055 near the air 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.

[0076] Further, the gas transmission structure includes an air inlet and an air outlet connecting the first cavity 3055 and the flame transmission channel. The air inlet is arranged at the top of the first cavity 3055, and the air outlet is arranged at the bottom of the flame 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.

[0077] 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 flame transmission channel. By controlling the rate of filling the gas channel with the gas, the flow rate of the gas is adjusted, thereby ensuring that the flow rate of the gas at the ignition outlet 308-a and the ignition outlet 308 of the flame transmission channel is suitable for ignition stability or flame transmission stability.

[0078] Furthermore, the gas transmission structure includes a first gas transmission channel 3054 and a second gas transmission channel 3053. The cross-sectional area of the 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.

[0079] 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 through the second gas transmission channel 3053 to fill the fire transmission channel. The second gas transmission channel 3053 is arranged 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.

[0080] Furthermore, 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 arranged at the lower end of the fire transmission channel, further improving the efficiency of filling the fire transmission channel with gas.

[0081] Furthermore, the cross-sectional area of the first gas transmission channel 3054 gradually contracts near the second gas transmission channel 3053 to form a gas transmission surface. The second gas transmission channel 3053 is arranged on the gas transmission surface to communicate with the fire transmission channel. When the air flow in the first gas transmission channel 3054 enters the second gas transmission channel 3053 through the gas transmission surface, the air flow is buffered by the gas 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.

[0082] Furthermore, the position of the air outlet of the second gas transmission channel 3053 adjusts the direction according to the position of the first gas transmission channel 3054 between the first cavity 3055 and the fire transmission channel. For example, if the first gas transmission channel 3054 is arranged at a position close to the ignition inlet 308-a, then at least one second gas transmission channel 3054 is inclined on the first gas transmission channel 3053 in the direction towards the ignition outlet 308, ensuring that the gas evenly fills the fire transmission channel.

[0083] Furthermore, the ignition part 305 is provided with a plurality of gas transmission structures. The plurality of gas transmission structures are arranged in 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 gas transmission structures is evenly transmitted to each section of the fire transmission channel, improving the rate of airflow filling the fire transmission channel, and improving the ignition efficiency of the burner.

[0084] 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 close to the inner side of the outer fire cover 30 is higher than the end close to the outer side of the outer fire cover 30; due to the inclined arrangement 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 gas transmission channels 3053 located between the fire transmission channel and the cavity gradually decrease, and the height difference formed between the plurality of first gas 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 airflow.

[0085] As a specific implementation manner of this embodiment, there are three gas transmission structures between the fire transmission channel and the first cavity 3055;

[0086] The first gas transmission structure is close to the combustion plate 20. In the first gas transmission structure, the second gas transmission channel 3054 is inclined from the first gas transmission channel 3053 towards the ignition outlet 308-a;

[0087] The third gas transmission structure is close to the outer wall 316-c of the outer fire cover 30. The third gas transmission structure includes two second gas transmission channels 3054. One second gas transmission channel 3054 is vertically arranged between the fire transmission channel and the first gas transmission channel 3053, and the other second gas transmission channel 3054 is inclined from the first gas transmission channel 3053 towards the ignition outlet 308, further improving the rate of gas filling the fire transmission channel.

[0088] 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.

[0089] A gas transmission method for an ignition device of a burner: The outer fire cover 30 cooperates with the fire cover seat to form an outer ring air flow channel. 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 reduced, 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.

[0090] As Figure 2 shown, in the ignition device of the burner in this embodiment, the combustion plate 20 is arranged at intervals on the inner wall of the outer fire cover 30 of the burner; in addition to the ignition part 305, an ignition needle 90 is also arranged 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.

[0091] 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. The two ignition holes 3057 are arranged in sequence in the axial direction of the outer fire cover 30. 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.

[0092] Further, a gas transmission structure is arranged at the lower end of the fire transmission channel. The gas transmission structure provides gas for the fire transmission channel and the ignition hole 3057 at least through the air outlet; and the cross-section of the air outlet of the gas transmission structure is different from the cross-section of the ignition hole 3057, and the air 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 arranged on the side wall of the ignition inlet 308-a of the fire transmission channel, and the height of the ignition hole 3057 is lower than the set height of the ignition inlet 308-a.

[0093] Further, the ignition inlet 308-a communicates with the side wall where the ignition hole 3057 is located through an ignition groove 3051, and the ignition groove 3051 is arranged at a position higher than 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. 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, thus realizing the ignition of the burner.

[0094] Further, a small hole 3051-a is provided in the lower wall of the ignition groove 3051; the gas transmission structure provides gas for the small hole 3051-a in the groove through a second ignition channel, and the gas fills the fire transmission 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 fire transmission channel through the fire transmission groove more quickly, improving the fire transmission efficiency of the burner.

[0095] Further, 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 communicates with the fire transmission 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 to communicate with the fire 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 divided by the second gas transmission channel 3053, the first ignition channel, and the second ignition channel, while the flow rate is reduced, it is dispersed to multiple positions, improving the ignition stability of the ignition device.

[0096] 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 fire 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 that on the side of the fire 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 fire transmission channel, improving the fire transmission efficiency of the burner.

[0097] Further, the height of the ignition groove 3051 close to the combustion plate 20 is flush with the top end of the combustion plate 20; due to the connection between the ignition groove 3051 and the ignition inlet 308-a, and the fire outlet in the fire transmission 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 transmitted out of the fire transmission groove, the combustion plate 20 can be ignited, thus improving the ignition efficiency of the combustion plate 20.

[0098] Further, the height of the ignition groove 3051 near one end close to the combustion plate 20 is higher than that of the ignition groove 3051 far 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 mix with the gas overflowing from the combustion plate 20 due to 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.

[0099] Further, the gas transmission structure provides gas for the fire transfer channel through multiple gas outlets, ensuring that after the fire transfer channel is filled with gas as soon as possible, the gas is transmitted to the combustion plate 20 and the outer wall of the outer fire cover 30 through the ignition inlet 308-a and the ignition outlet 308 respectively; the multiple gas outlets can be realized by arranging multiple second gas transmission channels 3053 on a first gas transmission channel 3054, or can be realized by arranging multiple gas transmission structures, and are flexibly set according to the actual distance between the combustion plate 20 and the outer wall 307 of the outer fire cover 30.

[0100] As a specific implementation manner of this embodiment, there are three gas transmission structures between the fire transfer channel and the first cavity 3055;

[0101] On the side of the first gas transmission structure close to the combustion plate 20, in the first gas transmission structure, the second gas transmission channel 3054 is inclined from the first gas transmission channel 3053 towards the ignition outlet 308-a;

[0102] The third gas transmission structure is on the side close to the outer wall 316-c of the outer fire cover 30. The third gas transmission structure includes two second gas transmission channels 3054. One second gas transmission channel 3054 is vertically arranged between the fire transfer channel and the first gas transmission channel 3053, and the other second gas transmission channel 3054 is inclined from the first gas transmission channel 3053 towards the ignition outlet 308, further improving the rate of filling the fire transfer channel with gas.

[0103] 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.

[0104] 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 cover 30.

[0105] Further, for the ignition device of a burner described in this embodiment, the ignition method is as follows:

[0106] 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, along with the ignition of the ignition groove 3051, 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.

[0107] Such as Figure 3As shown, in the ignition device of the burner in this embodiment, combustion plates 20 are arranged at intervals on the inner wall of the outer fire cover 30 of the burner; in addition to the ignition part 305, ignition needles 90 are also arranged between the combustion plates 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 wall of the combustion plate 20 and the outer fire cover 30 respectively through the fire transfer channel via the ignition inlet 308-a and the ignition outlet 308, and transmits the 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 outer walls of the combustion plate 20 and the outer fire cover 30 respectively through the fire transfer channel; 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.

[0108] Further, 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.

[0109] The difference is that when the flame stabilizing hole 3083 is opened on the ignition part 305, a first flame stabilizing channel is arranged in the ignition part 305 to provide gas for the flame stabilizing hole 3083.

[0110] 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.

[0111] It should be noted that the ignition part 305 and the outer fire cover 30 can be integrated. In addition to this situation, the ignition part 305 can also be separately installed with the outer fire cover 30. After the ignition part 305 is installed in place on the outer wall of the outer fire cover, one end of the ignition part 305 where the ignition outlet 308 is arranged 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 further described.)

[0112] Further, a thermocouple 80 is arranged opposite to the ignition outlet 308 and the flame stabilizing hole 3083 on the outer wall 316-c of the outer fire cover 30. After the ignition device ignites the burner, the flames at the ignition outlet 308 and the flame stabilizing hole 3083 continuously burn the thermocouple 80.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] Furthermore, the outer wall 316-c of the external fire cover 30 includes two layers of first fire holes 3084-a and second fire holes 3084-b that are staggered; the fire transfer groove 3082 connects the ignition outlet 308 and the second fire hole 3084-b that is closest to the ignition outlet 308. When the ignition device is ignited, the flame is transferred from the fire transfer groove 3082 to the second fire hole 3084-b. Since the first fire hole 3084-a and the second fire hole 3084-b are staggered on the external fire cover 30, the distance between the fire holes 3084 is reduced, which improves the combustion intensity of the outer wall 316-c of the external fire cover 30 and further improves the flame transfer speed on the outer wall 316-c of the external fire cover 30.

[0118] Further, after the fire transfer groove 3082 communicates with the side of the second fire outlet hole 3084-b close to the ignition outlet 308, it continues to extend to the outer wall 316-c of the outer fire cover 20 between the two second fire outlet holes 3084-b, close to the first fire outlet hole 3084-a. And for the fire transfer groove 3082 between the two second fire outlet holes 3084-b, the farther it is from the second fire outlet hole 3084-b close to the ignition outlet 308, the shallower the depth of the fire transfer groove 3082, enhancing the fire transfer efficiency of the second fire outlet hole to transfer the flame to the first fire outlet hole 3084-a.

[0119] Further, for the ignition device of a burner described in this embodiment, its ignition method is as follows:

[0120] 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, as the fire transfer groove 3082 ignites the fire transfer passage and the combustion plate 20, the flame in the fire transfer passage is transferred from the ignition outlet 308 to the fire transfer groove 3082. After the flame ignites the second fire outlet hole 3084-b close to the ignition outlet 308 through the fire transfer groove 3082, it continues to ignite the first fire outlet hole 3084-a close to the second fire outlet hole 3084-b along the fire transfer groove 3082, and then the flame is transferred to the entire outer wall 316-c of the outer fire cover 30.

[0121] This embodiment provides a burner, as Figures 4 to 11 shown, including an outer fire cover 30 and a fire cover seat 40. The lower surface of the outer fire cover 30 and the upper surface of the fire cover seat 40 define an outer ring air flow channel 702. The outer wall 316-c of the outer fire cover 30 is a vertical ring surface, and upper and lower two circles of fire outlet 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 cover 30, and the axes of each circle of fire outlet holes 3084 are respectively arranged at different angles with respect to the radius of the outer fire cover 30.

[0122] In the present invention, the fire outlet holes 3084 are arranged at intervals on the outer fire cover 30, so that the distribution of the gas during combustion on the outer fire cover 30 is more uniform, which is beneficial to the full heating of the pot body. At the same time, the flame length can be shortened, preventing the burning of the pot support claws and resulting in high smoke.

[0123] 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 combustion plate 20 through the inner ring air flow channel below the combustion 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, and the outer ring air flow reaches the outer wall 316-c of the outer fire cover 30. 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.

[0124] In this embodiment, the flame outlet holes 3084 include a first flame outlet hole 3084-a and a second flame outlet hole 3084-b which are distributed up and down on the outer wall 316-c of the outer fire cap 30. The first flame outlet hole 3084-a is arranged close to the upper edge of the outer fire cap 30, and the first flame outlet hole 3084-a is inclined towards the fire cap base 40 to communicate the outer ring air flow channel 702 with the outside.

[0125] Specifically, the fire outlet end of the first flame 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 cap 30 and the upper surface of the fire cap base 40. The air inlet end is arranged on the upper surface of the outer ring air flow channel 702. That is to say, one end of the first flame 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 cap 30. The air inlet end of the first flame outlet hole 3084-a is arranged inside the outer fire cap 30.

[0126] It should be noted that the first flame outlet hole 3084-a is inclined from the air inlet end side to the fire outlet end side. The gas flows upward along the first flame outlet hole 3084-a from the air inlet end to the fire outlet end and is converted into a flame to provide heat. There is a height difference between the air inlet end and the fire outlet end, and the height of the air inlet end is less than that of the fire outlet end, so that the gas in the outer ring air flow channel 702 can better fill the first flame outlet hole 3084-a along the air inlet end, improving the combustion efficiency of the burner and meeting the user's needs.

[0127] 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 cap 30. It can also be understood that the first flame outlet hole 3084-a is inclined towards the fire cap base 40. The first flame outlet hole 3084-a penetrates the outer ring air flow channel 702 and the outside 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 cap 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.

[0128] 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 cap 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.

[0129] In this embodiment, the flame outlet hole 3084 further includes a second flame outlet hole 3084-b, which 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 in a staggered manner. In other words, there are two circles of flame outlet holes 3084, an upper circle and a lower circle, on the outer wall 316-c of the outer fire cover 30. The upper circle of flame outlet holes is the first flame outlet hole 3084-a, and the lower circle of flame outlet holes is the second flame outlet hole 3084-b. The first flame outlet hole 3084-a and the second flame outlet hole 3084-b are arranged at intervals, so that the distribution of the gas during combustion on the outer fire cover 30 is more uniform, which is beneficial to the full heating of the pot body.

[0130] Further, 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 included 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 included 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.

[0131] In this embodiment, the included angle between the axis of the first flame outlet hole 3084-a and the radius of the outer fire cover 30 in the clockwise direction is smaller than the included angle between the axis of the first flame outlet hole 3084-a and the radius of the outer fire cover 30 in the counterclockwise direction. The included angle between the second flame outlet hole 3084-b and the radius of the outer fire cover 30 in the clockwise direction is larger than the included angle between the second flame outlet hole 3084-b and the radius 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, making the emerging flame more uniform, which is beneficial to the full heating of 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.

[0132] 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 communicated with the outside, and the other end is provided with a collecting part 3084-3. The flame emerging from the burner is guided by the second flame outlet hole 3084-b and emerges below the outer fire cover 30, so that the distribution of the gas during combustion on the outer fire cover 30 is more uniform, preventing the pot support claws from being burned and causing high smoke.

[0133] In this embodiment, the first flame outlet hole 3084-a and the second flame outlet hole 3084-b are not both 180 degrees at the same time.

[0134] It should be noted that the first flame outlet hole 3084-a and the second flame outlet hole 3084-b are respectively inclined in different directions. This setting method enables each flame outlet hole to generate airflows in different directions, which can achieve more uniform combustion and higher combustion efficiency. At the same time, it enhances the flame coverage area of the burner and further improves the combustion efficiency.

[0135] In this embodiment, a collecting portion 3084-3 is formed by the bottom of the first hole 3084-1 being recessed towards the upper surface direction of the outer fire cover 30, and the surface of the collecting portion 3084-3 is a conical surface.

[0136] Specifically, a collecting portion 3084-3 is provided opposite to the end of the second flame outlet hole 3084-b communicating with the outside. The collecting portion is recessed 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 portion 3084-3 is a conical surface, which is more conducive to collecting the flame.

[0137] 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 are provided. A thick wall is formed between the second annular wall 309 and the outer wall 316-c, and the first flame outlet hole 3084-a, the second flame outlet hole 3084-b, and the second hole 3084-2 are opened on the thick wall. The inner outlet of the first flame outlet hole 3084-a is opened 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 flame outlet hole 3084-a, and the flame emerging from the outer fire cover 30 is more stable.

[0138] Furthermore, 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 radially outward from the side close to the combustion plate 20 towards 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 radially outward from the position away from the first annular wall 314 towards the edge 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.

[0139] In this embodiment, the lower part of the inclined toroidal surface 316-1 is connected to the bent surface 316-3 of the outer burner cap 30 through a smooth transition part 316-2. The angle of the smooth transition part 316-2 with respect to the radial direction of the outer annular gas flow channel 702 is smaller than the angle of the inclined toroidal surface 316-1. The inner outlet of the second flame outlet hole 3084-b or the second hole 3084-2 is opened on the smooth transition part 316-2. There is a certain included angle between the smooth transition part 316-2 and the inclined toroidal 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 guides the gas respectively, and guides the gas into the first flame outlet hole 3084-a or the second flame outlet hole 3084-b opened on their respective surfaces.

[0140] Above the outer annular gas flow channel 702, there are provided an inclined toroidal surface 316-1 connected to the first annular wall 314, a smooth transition part 316-2 connected to the inclined toroidal surface 316-1, and a bent surface 316-3 connected to the outer wall 316-c. One end of the first flame outlet hole 3084-a communicates with the outer wall 316-c, and the other end communicates with the inclined toroidal surface 316-1.

[0141] In this embodiment, the outer annular gas flow channel 702 formed by the insertion connection of the outer burner cap 30 and the burner cap base 40 is a variable cross-section channel. A secondary air channel is formed in the outer annular gas flow channel, and a side annular wall 304-1 is provided outside the secondary air channel. The side toroidal surface 316-4 outside the outer annular gas flow channel 702 is parallel to the inner toroidal surface 316-5, and the distance between the side toroidal surface 316-4 and the side annular wall 304-1 is smaller than the distance between the inner toroidal surface 316-5 and the side annular wall 304-1. The distance between the smooth transition part 316-2 and the side annular wall 304-1 is greater than the distance between the inclined toroidal surface 316-1 and the side annular wall 304-1. The outer annular gas flow channel 702 changes its diameter four times in the height direction. The distance of the outer annular gas flow channel 702 gradually decreases in the height direction. The gas is pressurized by reducing the space, so that the gas flow rate becomes larger. It can also be understood that the gas flow rate at the inner outlet of the first flame outlet hole 3084-a becomes larger, timely supplementing the gas, ensuring the stable combustion of the flame and ensuring the combustion efficiency.

[0142] In this embodiment, the upper end of the inclined toroidal surface 316-1 is connected to the side annular wall 304-1 of the secondary air passage through the inclined surface 316-6. The radial angle of the inclined surface 316-6 with respect to the outer annular gas flow passage 702 is less than 90 degrees in the counterclockwise direction. The upper part of the outer annular gas flow passage 702 is inclined by 3084 towards the flame outlet hole. The gas is guided by the inclined surface 316-6 to ensure the stable combustion of the flame emerging from the fire hole, thereby ensuring the combustion efficiency. The aperture of the second flame outlet hole 3084-b is larger than that of the second hole 3084-2. The area of the flame outlet is increased through the second flame outlet hole 3084-b, ensuring the combustion efficiency. The second flame outlet hole 3084-b communicates with the outer annular gas flow passage 702 through the second hole 3084-2. One end of the second hole 3084-2 communicates with the smooth transition part 316-2.

[0143] In this embodiment, the second flame outlet hole 3084-b communicates with the 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 cover 30 to communicate the second flame outlet hole 3084-b and the outer annular gas flow passage 702.

[0144] Furthermore, the second flame outlet hole 3084-b communicates with the outer annular gas flow passage 702 through the second hole 3084-2, and the gas flows towards the second flame outlet hole 3084-b through the second hole 3084-2.

[0145] It should be noted that the intake end of the second hole 3084-2 is arranged on the upper surface of the outer annular gas flow passage 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 flame outlet hole 3084-b.

[0146] Furthermore, the outlet end of the second flame outlet hole 3084-b is arranged on the lower bottom surface of the second flame outlet hole 3084-b and is arranged close to one side of the gathering part 3084-3, so as to better gather the flame in the second flame outlet hole 3084-b and then emerge from the first hole 3084-1.

[0147] 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 annular gas flow passage 702.

[0148] Furthermore, the gas passes through the second hole 3084-2 from the outer annular gas flow passage 702 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 then emerges to the outside after being blocked by the second flame outlet hole 3084-b.

[0149] 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.

[0150] In this embodiment, the outer ring of the outer fire cover 30 is set as a vertical toroidal surface for the outer wall 316-c. The upper surface of the outer fire cover 30 is inclined with a first ring wall 314 from the side close to the combustion plate 20 towards the edge of the outer fire cover 30. The air outlet 304-a of the secondary air passage is arranged on the first ring wall 314. The ignition part 305 is arranged in any one of the air outlets 304-a, and the air outlet 304-a is separated into a first air outlet 405 and a second air outlet 406. The ignition needle 90 is arranged in the first air outlet 405.

[0151] In this embodiment, a part of the first flame outlet hole 3084-a is set as a stepped hole, or is spaced as a stepped hole. Specifically, the diameter of the first flame outlet hole 3084-a at the end facing the outer ring air flow passage 702 becomes smaller, and the diameter of the first flame outlet hole 3084-a at the end facing the outside becomes larger. The first flame outlet hole 3084-a is connected to the outer ring air flow passage 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 between 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 more likely to emerge, ensuring the combustion efficiency. And the first hole 3084-1 points to the radial outer ring air flow passage 702. 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 the hole diameter, the flame length is shortened, preventing the burning of the claws of the pot support.

[0152] Preferably, the first flame outlet hole 3084-a and the first hole 3084-1 are respectively opened on the outer wall 316-c of the outer fire cover 30 at the connection between the high-transparency plate 10 and the outer fire cover 30. The position of the first flame outlet hole 3084-a corresponds to the claws of the pot support. The first flame outlet hole 3084-a is set as a stepped hole, that is, the end connected to the outer ring air flow passage 702 is set as the first hole 3084-1, and the diameter of the first hole 3084-1 is smaller than that of the first flame outlet hole 3084-a. By setting the stepped hole, it is prevented that the burning of the claws of the pot support causes the smoke to be too high.

[0153] For the sake of description, Figure 10 The arrows in the figure indicate the flow direction of the smoke in the smoke exhaust passage.

[0154] 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 cover 10, and the combustion plate 20. The smoke exhaust passage communicates the combustion plate 20 with the outside world, so that the flue gas generated by the combustion plate 20 can flow to the outside world, reducing the resistance at the combustion plate 20, thereby facilitating the gas supply speed and supply volume of the combustion plate 20, improving the thermal efficiency of the combustion plate 20, and ensuring the combustion effect.

[0155] It should be noted that the smoke exhaust passage is the gap between the upper cover and the outer fire cover 30 formed by connecting several columns and the passage between the columns. The high-temperature flue gas flows out of the outside world along the smoke exhaust passage from the combustion plate 20.

[0156] In this way, the flue gas 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 full combustion of the combustion plate 20, and further ensuring that the combustion plate 20 can emit infrared rays.

[0157] In this embodiment, the high-transparency plate 10 is covered above the outer fire cover 30 at a certain distance. It can also be understood that the high-transparency plate 10 is covered above the combustion plate 20 at a certain distance. 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, thus ensuring the combustion effect of the burner.

[0158] 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 the overflow of the pot from flowing onto the combustion plate 20 and causing blockage of the combustion plate 20, thus ensuring the stable combustion of the combustion plate 20 and further ensuring the stable combustion of the entire burner.

[0159] The diameter of the support plate 102 is slightly larger than the diameter of the outer fire cover 30. The high-temperature flue gas flows from the smoke exhaust passage to above the outer fire cover 30 and then flows out of the outside world. The outer edge of the support plate 102 slopes downward, which can gather the high-temperature flue gas above the outer fire cover 30, and the flame emitted from the outer fire cover 30 burns again, making the combustion more complete.

[0160] 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.

[0161] In this embodiment, the flame 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 fire cover 30, the flame emerging from the flame outlet holes 3084 burns the high-temperature flue gas again.

[0162] It should be noted that when the high-temperature flue gas flows from the smoke exhaust passage to the outside above the outer fire cover 30, the high-temperature flue gas gathers above the outer fire cover 30 and is burned again by the flame emerging from the outer fire cover 30, resulting in more complete combustion. 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 flows out through the gap above the outer fire cover 30 along with the smoke exhaust passage and is burned again by the flame emerging from the flame outlet holes 3084 provided on the outer fire cover 30, making the combustion more complete.

[0163] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the technical solution scope of the present invention, can make some changes or modifications to the above-mentioned technical content as 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 technical solution content 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), and an ignition part (305) is arranged between the combustion plate (20) and the outer fire cover (20); The ignition part (305) includes, a fire transmission channel, and the fire transmission channel communicates with the outer wall (316-c) of the combustion plate (20) and the outer fire cover (30); a first cavity (3055), which communicates with the gas, and conveys the gas to the fire transmission channel through a gas transmission structure.

2. The ignition device for a burner according to claim 1, characterized in that, at least part of the ignition part (305) extends into the outer fire cover (30), and the ignition inlet (308-a) of the fire transmission channel is located on the side of the fire transmission channel close to the combustion plate (20); the ignition outlet (308) is arranged on the outer wall of the outer fire cover (30), and the first cavity (3055) is located below the fire transmission channel and at least part of it is lower than the combustion plate (20).

3. The ignition device for a burner according to claim 1, characterized in that, the first cavity (3055) communicates with the inner ring air flow channel that supplies gas to the combustion plate (20); or the first cavity (3055) communicates with the inner ring air flow channel that supplies gas to the combustion plate (20) and the outer ring air flow channel that supplies gas to the outer wall (316-c) of the outer fire cover (20).

4. The ignition device for a burner according to claim 3, characterized in that, the peripheral wall of the first cavity (3055) close to the inner ring air flow channel communicates with the inner ring air flow channel; the other end extends in the radial direction along the direction of the outer fire cover (20) to the inner wall (316-c) of the outer fire cover (30) or at least part of it extends into the outer fire cover (30).

5. The ignition device for a burner according to claim 4, characterized in that, the inner diameter of the inner ring air flow channel gradually increases in the direction close to the combustion plate (20) to be in a trumpet shape; the combustion plate (20) is arranged at the trumpet opening with the largest inner diameter of the inner ring air flow channel; the first cavity (3055) communicates with the side wall of the inner ring air flow channel through a through hole (315); or the first cavity (3055) communicates with the side wall of the inner ring air flow channel through a through channel.

6. The ignition device for a burner according to claim 5, characterized in that, the opening height of the through hole (315) or the through channel in the inner ring air flow channel is higher than the opening height in the first cavity.

7. The ignition device for a burner according to claim 1, characterized in that, the gas transmission structure includes an air inlet and an air outlet that communicate the first cavity (3055) with the fire transmission channel; the air inlet is arranged at the upper end of the first cavity (3055), and the air outlet is arranged at the lower end of the fire transmission channel; the cross-sectional area of the air inlet is larger than the cross-sectional area of the air outlet.

8. The ignition device according to claim 7, characterized in that, the gas transmission structure includes a first gas transmission channel (3053) and a second gas transmission channel (3054) that are connected in sequence; the cross-sectional area of the first gas transmission channel (3053) is larger than the cross-sectional area of the second gas transmission channel (3054) the air inlet is arranged at the bottom end of the first gas transmission channel, and the air outlet is arranged at the top end of the second gas transmission channel.

9. An ignition device according to claim 8, characterized in that, the cross-sectional area at the top of the first air passage (3053) gradually contracts to form an air transmission surface; the second air passage (3054) is arranged on the air transmission surface.

10. An ignition device according to claim 9, characterized in that, there are three air transmission structures between the fire transmission channel and the first cavity (3055).

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