A three-ring fire burner

Abstract

The present invention discloses a three-ring fire burner, comprising: a burner body, having an inner air cavity, an inner ring air cavity, a middle ring air cavity, an outer air cavity with a top opening, and an outer ring air cavity arranged radially from the inside to the outside, an air outlet connected to the inner air cavity and an inner fire hole group connected to the inner ring air cavity provided at the top of the burner body; an ignition hole group, provided on the burner body and located below the air outlet, the inner air cavity being connected to the inner ring air cavity and / or the middle ring air cavity through the ignition hole group; and an ignition sensing needle, provided in the inner air cavity and located below the air outlet, the air outlet direction of the ignition hole group being toward the ignition sensing needle. The three-ring fire burner of the present invention has uniform firepower distribution, the inner ring fire burns more fully, and the ignition sensing needle is hidden in the inner air cavity, making the appearance of the entire burner more concise.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, in particular to a triple-ring fire burner. Background Art

[0002] The three rings of a triple-ring burner are often arranged on three or two flame covers. If arranged on three flame covers, the burner structure becomes relatively complex and larger in size. If arranged on two flame covers, one of the flame covers will need to have two rings. If the inner flame cover has two rings, the inner ring often burns poorly due to the lack of a separate secondary air supply channel.

[0003] The ignition sensing pin of a gas stove is usually placed on the outside of the inner fire cover, which can not only ignite but also sense the flame when the fire is low. However, the exposed ignition pin usually makes the burner difficult to clean. If food or spilled liquid during cooking covers it, it will affect ignition and sensing, affecting the user experience. Summary of the Invention

[0004] The present invention aims to solve, at least to a certain extent, one of the problems existing in the existing related technologies. To this end, the present invention proposes a three-ring fire burner with uniform fire distribution, more complete combustion of the inner ring fire, and the ignition sensing needle hidden in the inner air cavity, which not only realizes the low-fire ignition function and the low-fire flame sensing function, but also makes the appearance of the entire burner simpler.

[0005] According to the triple-ring fire burner provided above, it is realized by the following technical solutions:

[0006] A three-ring fire burner comprises: a burner body, having an inner air cavity, an inner ring air cavity, a middle ring air cavity, an outer air cavity with a top opening, and an outer ring air cavity arranged from the inside to the outside in a radial direction, an air outlet connected to the inner air cavity and an inner fire hole group connected to the inner ring air cavity provided at the top of the burner body; an ignition hole group, arranged on the burner body and located below the air outlet, the inner air cavity being connected to the inner ring air cavity and / or the middle ring air cavity through the ignition hole group; and an ignition sensing needle, arranged in the inner air cavity and located below the air outlet, the air outlet direction of the ignition hole group being toward the ignition sensing needle.

[0007] In some embodiments, the ignition hole group includes inner ring ignition holes and / or middle ring ignition holes, the inner ring air cavity is connected to the inner air cavity through the inner ring ignition holes, and the middle ring air cavity is connected to the inner air cavity through the middle ring ignition holes.

[0008] In some embodiments, the number of the inner ring ignition holes is not less than three, and all of the inner ring ignition holes are spaced apart in the circumferential direction; the number of the middle ring ignition holes is not less than three, and all of the middle ring ignition holes are spaced apart in the circumferential direction.

[0009] In some embodiments, the top of the inner air cavity is open to form an upper air vent, which constitutes the air outlet; or an air hole group connected to the inner air cavity is provided at the top center position of the burner body, and the air hole group constitutes the air outlet.

[0010] In some embodiments, the air hole group is composed of a plurality of secondary air holes arranged at intervals.

[0011] In some embodiments, the bottom of the inner air cavity is open to form a lower air vent for secondary air to pass through, and the lower air vent is connected to the inner air cavity; the burner body also has a transversely arranged secondary air channel, and the outer air cavity is connected to the inner air cavity or the external atmosphere outside the burner body through the secondary air channel.

[0012] In some embodiments, a mounting hole for the ignition sensing needle to pass through is provided at the bottom of the inner air cavity, and the hole wall of the mounting hole is sealedly connected to the ignition sensing needle; the burner body has a transversely arranged secondary air channel, and the radial outer end of the secondary air channel passes through the outer side wall of the burner body, and the radial inner end is respectively connected to the outer air cavity and the inner air cavity.

[0013] In some embodiments, a support seat extending inward is integrally formed on the cavity wall of the inner air cavity, and the support seat is provided with a vertically arranged mounting hole. The lower end of the ignition sensor needle is passed through the mounting hole and abuts or is fastened to the support seat.

[0014] In some embodiments, the inner fire hole group includes at least one circle of inner ring fire hole group, and the inner ring fire hole group includes a plurality of inner ring straight fire holes evenly spaced along the circumferential direction.

[0015] In some embodiments, a middle fire hole group connected to the middle ring air cavity is provided on the top of the burner body, or a middle fire hole group connected to the middle ring air cavity and the outer air cavity respectively is provided on the outer ring wall of the middle ring air cavity; an outer fire hole group connected to the outer ring air cavity is provided on the top or outer side wall of the burner body.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. The triple-ring burner of the present invention has an inner air cavity, an inner ring air cavity, a middle ring air cavity, an outer air cavity with a top opening, and an outer ring air cavity arranged radially from the inside to the outside. The inner air cavity provides secondary air to the inner side of the inner ring fire, while the outer air cavity provides secondary air to the outer side of the middle ring fire. This results in evenly distributed firepower without crossover, more complete combustion of each ring fire, and higher heat exchange efficiency.

[0018] 2. By placing the ignition sensing needle in the inner air cavity and below the air outlet, and providing an ignition hole group below the air outlet on the burner body, the inner air cavity is connected to the inner ring air cavity and / or the outer ring air cavity through the ignition hole group. This allows the ignition sensing needle to be hidden in the inner air cavity and below the air outlet, preventing it from being exposed, and making the entire burner look simpler.

[0019] 3. The air outlet is composed of an air hole group, which in turn is composed of multiple secondary air holes arranged at intervals. The ignition sensing needle is placed in the inner air cavity and below the air hole group. This not only hides the ignition sensing needle within the burner body, making the burner look simpler, but also prevents food from falling into the inner air cavity and onto the ignition sensing needle during cooking, effectively ensuring more reliable ignition and sensing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a triple-ring fire burner in Example 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the three-ring fire burner in Example 1 of the present invention. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the structure of the three-ring fire burner in Example 1 of the present invention. Figure 2 ;

[0023] Figure 4 is a cross-sectional view of the burner body in Example 1 of the present invention;

[0024] Figure 5 is a cross-sectional view of another burner body in Example 1 of the present invention;

[0025] Figure 6 is a cross-sectional view of another burner body in Example 1 of the present invention;

[0026] Figure 7 This is a schematic structural diagram of another burner body in Example 1 of the present invention;

[0027] Figure 8 is a cross-sectional view of a triple-ring fire burner in Example 2 of the present invention;

[0028] Figure 9 Schematic diagram of the structure of the triple-ring fire burner in Example 2 of the present invention;

[0029] Figure 10 is a cross-sectional view of the burner body in Example 3 of the present invention;

[0030] Figure 11 It is a cross-sectional view of the burner body in Example 4 of the present invention.

[0031] In the figure: 1-burner body, 11-inner air cavity, 1101-secondary air hole, 1102-upper air vent, 111-lower air vent, 112-support seat, 113-anti-overflow boss, 1121-mounting hole, 12-inner ring air cavity, 121-inner ring straight fire hole, 13-middle ring air cavity, 131-middle ring fire hole, 14-outer air cavity, 15-outer ring air cavity, 151-outer ring fire hole, 16-secondary air channel; 21-inner ring ignition hole, 22-middle ring ignition hole; 3-ignition sensor needle. DETAILED DESCRIPTION

[0032] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0033] Example 1

[0034] refer to Figure 1-3 This embodiment provides a three-ring fire burner, comprising a burner body 1, an ignition hole group (not shown), and an ignition sensor needle 3. The burner body 1 is composed of a burner head and a fire cover. The burner head can be integrally cast or comprise a separate burner head body and gas distribution plate. The fire cover can be integrally cast or comprise a separate inner fire cover and outer fire cover.

[0035] The burner body 1 has five cavities, which include an inner air cavity 11, an inner ring cavity 12, a middle ring cavity 13, an outer air cavity 14 with a top opening, and an outer ring cavity 15, arranged radially from the inside out. An air outlet (not shown) communicating with the inner air cavity 11 is provided at the top center of the burner body 1. An inner fire hole group (not shown) located peripherally to the air outlet and communicating with the inner ring cavity 12 is provided at the top of the burner body 1. Gas burns in the inner fire hole group to form an inner ring fire (i.e., a small fire). Secondary air flows upward from the inner air cavity 11 and the air outlet in sequence, supplying the radially inner side of the inner ring fire, ensuring more complete combustion of the inner ring fire. A group of medium fire holes is provided at the top of the burner body 1, connecting to the medium ring air cavity 13. Alternatively, a group of medium fire holes is provided on the outer ring wall of the medium ring air cavity 13, connecting to the medium ring air cavity 13 and the outer air cavity 14, respectively. Gas burns in the medium fire hole group to form a medium ring fire (i.e., medium fire). An outer fire hole group is provided at the top or outer wall of the burner body 1, connecting to the outer ring air cavity 15. Gas burns in the outer fire hole group to form an outer ring fire (i.e., large fire). This shows that the burner is equipped with a three-ring fire, which evenly distributes the firepower and improves the combustion thermal efficiency.

[0036] The burner body 1 is provided with an ignition hole group located below the air outlet. The radial inner end of the ignition hole group is connected to the inner air cavity 11, and the radial outer end of the ignition hole group is connected to the inner ring air cavity 12 and / or the middle ring air cavity 13. In this embodiment, the inner air cavity 11 is connected to the inner ring air cavity 12 via the ignition hole group as an example. The ignition sensing needle 3 is arranged in the inner air cavity 11 and below the air outlet. The gas outlet direction of the ignition hole group is toward the ignition sensing needle 3. When the burner is ignited, the ignition sensing needle 3 can ignite the inner ring gas ejected from the ignition hole group. Because the inner fire hole group is arranged outside and close to the air outlet, the ignition flame is transmitted upward from the air outlet, quickly igniting the inner ring gas ejected from the inner fire hole group, realizing the low-fire ignition function. During the burner combustion process, the ignition sensing needle 3 can sense the low-fire flame through the air outlet above it, thereby realizing the low-fire flame sensing function. It can be seen that the air outlet of this embodiment is not only a secondary air supply channel when the burner is burning, but also a flame transmission channel when the burner is ignited and a flame sensing channel when the burner is working.

[0037] refer to Figure 1-3 In this embodiment, an air hole group (not shown in the figure) connected to the inner air cavity 11 is provided at the top center of the burner body 1, and the air hole group constitutes an air outlet. Optionally, the air hole group is composed of a plurality of secondary air holes 1101 arranged at intervals, and the secondary air holes 1101 serve as a secondary air supply channel during combustion. As a result, the ignition sensing needle 3 is placed in the inner air cavity and below the air hole group. On the one hand, the ignition sensing needle 3 is hidden in the burner body 1, making the burner appearance simpler. On the other hand, it prevents food from falling into the inner air cavity 11 and the ignition sensing needle 3 during cooking to a certain extent, effectively ensuring more reliable ignition and induction.

[0038] The secondary air sources of the inner air cavity 11 and the outer air cavity 14 include but are not limited to any of the following:

[0039] The first one, reference Figure 3-4 The bottom of the inner air cavity 11 is open to form a lower air vent 111. The inner air cavity 11 is connected to the atmosphere at the bottom of the burner through the lower air vent 111. At this time, the secondary air at the bottom of the burner flows into the inner air cavity 11 through the lower air vent 111, and then ejected upward from the air hole group, providing the secondary air required for combustion of the inner ring fire. The burner body 1 also has a plurality of transversely arranged secondary air channels 16. Each secondary air channel 16 passes through the outer ring air cavity 15 and the outer side wall of the burner body 1, and the radial inner end is connected to the outer air cavity 14. In this way, the outer air cavity 14 is connected to the external atmosphere outside the burner body 1 through the secondary air channel 16. It can be seen that the secondary air of the inner air cavity 11 and the outer air cavity 14 comes from different positions, ensuring that the secondary air supply of the two does not interfere with each other.

[0040] The second one, reference Figure 5 The difference from the first type is that the secondary air in the outer air cavity 14 comes from a different source. The burner body 1 also has multiple horizontally arranged secondary air passages 16, each of which penetrates the inner ring air cavity 12 and the middle ring air cavity 13. The outer air cavity 14 is connected to the inner air cavity 11 through the secondary air passages 16. In this way, the outer air cavity 14 is connected to the atmosphere at the bottom of the burner through the secondary air passages 16, the inner air cavity 11, and the lower air vent 111. It can be seen that the secondary air in the inner air cavity 11 and the outer air cavity 14 originates from the same location: the atmosphere at the bottom of the burner.

[0041] The third type, reference Figure 6-7 The difference from the first scenario is that the secondary air in the inner air cavity 11 has a different source. In the third scenario, the bottom of the inner air cavity 11 is sealed. To facilitate the assembly of the ignition sensor needle 3, a mounting hole 1121 is provided at the bottom of the inner air cavity 11 for the ignition sensor needle 3 to pass through. The wall of the mounting hole 1121 is sealed with the ignition sensor needle 3 to ensure the airtightness of the fitting between the wall of the mounting hole 1121 and the ignition sensor needle 3. This prevents the atmosphere at the bottom of the burner from flowing into the inner air cavity 11 through the fitting. Furthermore, any overflow into the inner air cavity 11 is prevented from flowing downward into the gas stove bottom shell. Furthermore, this prevents the heat of combustion from radiating into the gas stove bottom shell through the inner air cavity 11, thereby reducing the temperature rise inside the gas stove bottom shell.

[0042] Since the atmosphere at the bottom of the burner cannot flow into the inner air cavity 11 through the fitting, in order to provide secondary air to the inner air cavity 11, the burner body 1 also has a plurality of transversely arranged secondary air channels 16, each of which passes through the outer wall of the burner body 1, the outer ring air cavity 15, the middle ring air cavity 13 and the inner ring air cavity 12, and each of which is connected to the outer air cavity 14 and the inner air cavity 11, respectively. Thus, the inner air cavity 11 and the outer air cavity 14 are both connected to the outside atmosphere outside the burner body 1 through the secondary air channels 16. It can be seen that the secondary air of the inner air cavity 11 and the outer air cavity 14 comes from the same location, that is, from the outside atmosphere outside the burner body 1. In addition, the secondary air channels 16 can be used as drainage channels in the event of overflow, so as to facilitate the discharge of overflow into the inner air cavity 11 and / or the outer air cavity 14 outside the burner.

[0043] refer to Figure 6 To further prevent overflowing liquid from the inner air cavity 11 from flowing into the gas stove bottom housing through the interface between the mounting hole 1121 and the ignition sensor pin 3, an upwardly extending overflow prevention boss 113 is integrally formed on the wall of the mounting hole 1121 and positioned around the periphery thereof. This overflow prevention boss is in sealed connection or has a clearance fit with the ignition sensor pin 3. Optionally, the overflow prevention boss and the ignition sensor pin 3 can be sealed by a sealing ring or an interference fit.

[0044] refer to Figure 1-4 In order to firmly and reliably install the ignition sensing needle 3 in the inner air cavity 11, a support seat 112 extending inward is integrally formed on the cavity wall of the inner air cavity 11. The support seat 112 is provided with a vertically arranged mounting hole 1121 for the ignition sensing needle 3 to pass through. The lower end of the ignition sensing needle 3 is passed through the mounting hole 1121 and abuts or is tightly connected to the support seat 112. Optionally, the mounting hole 1121 includes a lower through hole and an upper through hole that are connected to each other. The horizontal cross-sectional area of the upper through hole is larger than the horizontal cross-sectional area of the lower through hole, so as to form a support platform at the joint of the two. The support platform abuts the ignition sensing needle and limits the ignition sensing needle to the lower position to prevent the ignition sensing needle from falling out downward. Of course, the ignition sensing needle 3 can also be fastened to the support seat 112 by screws, so that the ignition sensing needle 3 is more firmly and reliably connected to the burner body 1.

[0045] refer to Figure 1-2 The inner fire hole group includes at least one circle of inner ring fire hole groups. In this embodiment, the number of inner ring fire hole groups is three circles. Each circle of inner ring fire hole groups includes a plurality of inner ring straight fire holes 121 evenly spaced along the circumferential direction. Each inner ring straight fire hole 121 is connected to the inner ring air cavity 12. Gas is ejected upward from the inner ring straight fire hole 121 and ignited to form a straight jet fire or an inner concentrated fire, so that the low fire power is evenly distributed at the bottom of the pot without dead angles, providing a good cooking experience and high heat exchange efficiency. In this embodiment, the diameter of the secondary air hole 1101 is larger than the diameter of the inner ring straight fire hole 121 to ensure a larger secondary air unit ventilation area so that the inner ring fire can burn fully.

[0046] The middle fire hole group includes a plurality of middle ring fire holes 131 evenly spaced circumferentially. Each middle ring fire hole 131 communicates with the middle ring air cavity 13. In this embodiment, all the middle ring fire holes 131 are circumferentially spaced on the outer wall of the middle ring air cavity 13, so that the middle ring air cavity 13 communicates with the outer air cavity 14 through the middle ring fire holes 131. Of course, all the middle ring fire holes 131 can also be circumferentially spaced on the top of the burner body 1 and located outside the inner fire hole group.

[0047] The outer fire hole group includes a plurality of outer ring fire holes 151 evenly spaced circumferentially. Each outer ring fire hole 151 communicates with the outer ring air cavity 15. In this embodiment, all outer ring fire holes 151 are circumferentially spaced on the outer cavity wall of the outer ring air cavity 15 (i.e., the outer wall of the burner body 1). Of course, all outer ring fire holes 151 can also be circumferentially spaced radially outward from the top of the burner body 1 and located outside the outer air cavity 14.

[0048] refer to Figure 1 The ignition hole group includes an inner ring ignition hole 21, and the inner ring air cavity 12 is connected to the inner air cavity 11 through the inner ring ignition hole 21. In this way, the ignition sensing needle 3 can ignite the gas ejected from the inner ring ignition hole 21, and then quickly ignite or ignite a small fire.

[0049] In order to increase the unit ignition gas volume and the ignition flame range, and to make ignition and induction more reliable, the present embodiment sets the number of inner ring ignition holes 21 to six, and of course it can also be set to ten, wherein three or five inner ring ignition holes 21 are circumferentially spaced at the upper end of the cavity wall of the inner air cavity 11 and arranged close to the air outlet to form upper ignition holes; another three or five inner ring ignition holes 21 are circumferentially spaced at the upper end of the cavity wall of the inner air cavity 11 and arranged close to the air outlet to form lower ignition holes located directly below the upper ignition holes. Thus, the upper ignition holes and the lower ignition holes cooperate to form two steps of ignition gas, and the lower ignition holes can act as flame stabilizing holes, thereby improving ignition reliability and ignition success rate.

[0050] Example 2

[0051] refer to Figure 8-9 The difference between this embodiment and embodiment 1 is that the structure of the air outlet is different. In this embodiment, the top of the inner air cavity 11 is opened to form an upper air vent 1102, that is, an upper air vent 1102 is opened at the top center position of the burner body 1. The upper air vent 1102 constitutes an air outlet so that the ignition sensor needle 3 is not hidden. In this way, it is not only beneficial to increase the secondary air unit supply area of the inner ring fire, but also does not need to remove the fire cover, which is more convenient for maintenance of the ignition sensor needle 3.

[0052] Example 3

[0053] refer to Figure 10 This embodiment differs from Embodiments 1 or 2 in the structure and connection method of the ignition hole group. In this embodiment, the ignition hole group transversely extends through the inner ring air cavity 12, and the inner air cavity 11 is connected to the middle ring air cavity 13 via the ignition hole group. This shows that by connecting the outer ends of the ignition hole group to the middle ring air cavity 13, a portion of the middle ring gas is utilized as ignition gas. Compared to connecting the outer ends of the ignition hole group to the inner ring air cavity 12, this embodiment provides a greater amount of ignition gas, further improving the ignition success rate.

[0054] The ignition hole group includes a middle ring ignition hole 22, and the middle ring air cavity 13 is connected to the inner air cavity 11 through the middle ring ignition hole 22, so that the ignition sensing needle 3 can ignite the gas ejected from the middle ring ignition hole 22, and then quickly ignite or ignite a small fire.

[0055] Optionally, the number of the center ring ignition holes 22 is set to six, or of course, ten. Three or five of the center ring ignition holes 22 are circumferentially spaced apart at the upper end of the cavity wall of the inner air cavity 11 and arranged near the air outlet to form upper ignition holes; another three or five center ring ignition holes 22 are circumferentially spaced apart at the upper end of the cavity wall of the inner air cavity 11 and arranged relatively close to the air outlet to form lower ignition holes located directly below the upper ignition holes. The upper and lower ignition holes cooperate to form two steps of ignition gas, and the lower ignition holes can act as flame stabilizing holes, thereby increasing ignition reliability and success rate.

[0056] Example 4

[0057] refer to Figure 11 This embodiment differs from Embodiments 1 or 2 in the structure and connection method of the ignition hole group. In this embodiment, the inner air cavity 11 connects to the inner ring air cavity 12 and the middle ring air cavity 13 through the ignition hole group. This allows for the utilization of both the inner ring gas and the middle ring gas as ignition gas, by connecting the outer ends of the ignition hole group to the inner ring air cavity 12 and the middle ring air cavity 13, respectively. Compared to a case where the outer ends of the ignition hole group connect only to the inner ring air cavity 12 or the middle ring air cavity 13, this embodiment provides a greater amount of ignition gas, further improving both the success rate and reliability of ignition.

[0058] The ignition hole group includes an inner ring ignition hole 21 and a middle ring ignition hole 22. The inner ring air cavity 12 is connected to the inner air cavity 11 through the inner ring ignition hole 21; the middle ring ignition hole 22 passes through the inner ring air cavity 12 horizontally, and the middle ring air cavity 13 is connected to the inner air cavity 11 through the middle ring ignition hole 22.

[0059] Optionally, the number of inner ring ignition holes 21 is set to three or five, and all inner ring ignition holes 21 are circumferentially spaced at the upper end of the cavity wall of the inner air cavity 11 and arranged closer to the air outlet to form lower ignition holes. The number of middle ring ignition holes 22 is set to three or five, and all middle ring ignition holes 22 are circumferentially spaced at the upper end of the cavity wall of the inner air cavity 11 and arranged closer to the air outlet to form upper ignition holes located directly above the lower ignition holes. In this way, the upper and lower ignition holes cooperate to form two steps of ignition gas, and the lower ignition holes can act as flame stabilizing holes, thereby increasing ignition reliability and success rate.

[0060] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A triple-ring fire burner, characterized in that: include: A burner body (1) is provided with an inner air cavity (11), an inner ring air cavity (12), a middle ring air cavity (13), an outer air cavity (14) with a top opening, and an outer ring air cavity (15) arranged from the inside to the outside in a radial direction. An air outlet communicating with the inner air cavity (11) and an inner fire hole group communicating with the inner ring air cavity (12) are provided at the top of the burner body (1); An ignition hole group is provided on the burner body (1) and is located below the air outlet, and the inner air cavity (11) is connected to the inner ring cavity (12) and / or the middle ring cavity (13) through the ignition hole group; and an ignition sensing needle (3) is provided in the inner air cavity (11) and is located below the air outlet, and the air outlet direction of the ignition hole group is toward the ignition sensing needle (3), and the ignition hole group includes an inner ring ignition hole (21) and / or a middle ring ignition hole (22), the inner ring cavity (12) is connected to the inner air cavity (11) through the inner ring ignition hole (21), and the middle ring cavity (13) is connected to the inner air cavity (11) through the middle ring ignition hole (22).

2. A triple-ring fire burner according to claim 1, characterized in that: The number of the inner ring ignition holes (21) is not less than three, and all the inner ring ignition holes (21) are arranged at intervals along the circumferential direction; the number of the middle ring ignition holes (22) is not less than three, and all the middle ring ignition holes (22) are arranged at intervals along the circumferential direction.

3. A triple-ring fire burner according to claim 1, characterized in that: The top of the inner air cavity (11) is open to form an upper air vent (1102), and the upper air vent (1102) constitutes the air outlet; or an air hole group connected to the inner air cavity (11) is provided at the top center position of the burner body (1), and the air hole group constitutes the air outlet.

4. A triple-ring fire burner according to claim 3, characterized in that: The air hole group is composed of a plurality of secondary air holes (1101) arranged at intervals.

5. A triple-ring fire burner according to claim 1 or 3, characterized in that: The bottom of the inner air cavity (11) is open to form a lower air vent (111) for secondary air to pass through, and the lower air vent (111) is connected to the inner air cavity (11); the burner body (1) also has a transversely arranged secondary air channel (16), and the outer air cavity (14) is connected to the inner air cavity (11) or the external atmosphere outside the burner body (1) through the secondary air channel (16).

6. A triple-ring fire burner according to claim 1 or 3, characterized in that: A mounting hole (1121) for the ignition sensing needle (3) to pass through is provided at the bottom of the inner air cavity (11), and the hole wall of the mounting hole (1121) is sealedly connected to the ignition sensing needle (3); The burner body (1) has a transversely arranged secondary air channel (16), the radial outer end of the secondary air channel (16) passes through the outer side wall of the burner body (1), and the radial inner end is connected to the outer air cavity (14) and the inner air cavity (11).

7. The triple-ring fire burner according to claim 1, characterized in that: A support seat (112) extending inward is integrally formed on the cavity wall of the inner air cavity (11), and the support seat (112) is provided with a vertically arranged mounting hole (1121). The lower end of the ignition sensor needle (3) is passed through the mounting hole (1121) and is abutted against or fastened to the support seat (112).

8. The triple-ring fire burner according to claim 1, characterized in that: The inner fire hole group comprises at least one inner ring fire hole group, and the inner ring fire hole group comprises a plurality of inner ring straight fire holes (121) uniformly spaced along the circumferential direction.

9. The triple-ring fire burner according to claim 1, characterized in that: A middle fire hole group connected to the middle ring air cavity (13) is provided on the top of the burner body (1), or a middle fire hole group connected to the middle ring air cavity (13) and the outer air cavity (14) is provided on the outer ring wall of the middle ring air cavity (13); and an outer fire hole group connected to the outer ring air cavity (15) is provided on the top or outer side wall of the burner body (1).

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