A high-efficiency burner

Abstract

The present invention discloses a high-efficiency burner, comprising: a burner body, having an inner ring air cavity, an inner 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 high-efficiency burner of the present invention has uniform firepower distribution, and each ring fire can burn more fully. It can also realize the ignition function of low and medium fire and the flame sensing function of low and medium fire.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and in particular to a high-efficiency burner. Background Art

[0002] Burners are often installed on either three or two burner covers. Installing on three covers results in a relatively complex and larger burner structure. Installing on two covers requires one burner cover to have two rings. When the inner burner cover is installed with two rings, the inner ring often lacks a separate secondary air supply channel, resulting in poor combustion.

[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 high-efficiency burner with uniform fire distribution, more complete combustion of each ring fire, and the ability to realize low and medium fire ignition functions and low and medium fire flame sensing functions.

[0005] According to the above-mentioned high-efficiency burner, it is achieved through the following technical solutions:

[0006] A high-efficiency burner comprises: a burner body, having an inner ring air cavity, an inner 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 ignition holes are arranged on the inner ring wall of the inner ring air cavity, and the inner ring air cavity is connected to the inner air cavity through the inner ring ignition holes; the middle ring ignition holes are arranged on the outer ring wall of the inner ring air cavity, 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 arranged at intervals along the circumferential direction of the inner ring wall of the inner ring air cavity; the number of the middle ring ignition holes is not less than three, and all of the middle ring ignition holes are arranged at intervals along the circumferential direction of the outer ring wall of the inner ring air cavity.

[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 includes at least one circle of air hole groups, and the sub-air hole group is composed of a plurality of secondary air holes arranged at intervals in the circumferential direction; the inner fire hole group includes a plurality of inner ring straight fire holes arranged at intervals.

[0011] In some embodiments, the horizontal cross-sectional area of the secondary air hole is larger than the horizontal cross-sectional area of the inner ring straight fire hole.

[0012] 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.

[0013] In some embodiments, the inner air cavity includes a lower placement cavity and an upper air cavity having the air outlet and connected to the ignition hole group. A mounting hole for the ignition sensing needle to pass through is provided at the bottom of the upper air cavity, and the placement cavity is connected to the upper air cavity through the mounting hole; the ignition sensing needle is arranged in the lower placement cavity, and its upper end extends into the upper air cavity after passing through the mounting hole.

[0014] In some embodiments, the burner body has a transversely arranged secondary air channel, wherein 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 connected to the outer air cavity and the upper air cavity respectively.

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

[0016] In some embodiments, the middle fire hole group is arranged on the outer ring wall of the middle ring air cavity, and an internal fire transfer structure connected to the middle ring air cavity is provided on the top of the burner body, the radial inner end of the internal fire transfer structure is close to or connected to the air outlet, and the radial outer end of the internal fire transfer structure is close to or connected to the middle fire hole group.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. The high-efficiency fire burner of the present invention has a burner body with an inner ring air cavity, an inner 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 and middle ring fires, while the outer air cavity provides secondary air to the outside of the middle ring fire. This results in evenly distributed firepower, more complete combustion of each ring fire, and higher heat exchange efficiency.

[0019] 2. By arranging 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, which can not only realize the ignition function of low and medium fire, but also realize the flame sensing function of low and medium fire;

[0020] 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

[0021] Figure 1 is a cross-sectional view of a high-efficiency burner in Example 1 of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the high-efficiency burner in Example 1 of the present invention;

[0023] Figure 3 is a cross-sectional view of the burner body in Example 1 of the present invention;

[0024] Figure 4 is a cross-sectional view of another burner body in Example 1 of the present invention;

[0025] Figure 5 is a cross-sectional view of another burner body in Example 1 of the present invention;

[0026] Figure 6 Schematic diagram of the structure of another high-efficiency burner in Example 2 of the present invention;

[0027] Figure 7 is a top view of a high-efficiency burner in Example 3 of the present invention;

[0028] Figure 8 is a cross-sectional view of a high-efficiency burner in Example 4 of the present invention;

[0029] Figure 9 Schematic diagram of the structure of a high-efficiency burner in Example 4 of the present invention;

[0030] Figure 10 is a cross-sectional view of a burner body in Example 5 of the present invention;

[0031] Figure 11 It is a cross-sectional view of the burner body in Example 6 of the present invention.

[0032] In the figure: 1-burner body, 11-inner air cavity, 1101-secondary air hole, 1102-upper air vent, 1103-lower air vent, 111-lower placement cavity, 112-upper air cavity, 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, 171-inner fire transfer groove, 172-outer fire transfer groove; 21-inner ring ignition hole, 22-middle ring ignition hole; 3-ignition sensor needle. DETAILED DESCRIPTION

[0033] 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.

[0034] Example 1

[0035] refer to Figure 1-3 This embodiment provides a high-efficiency burner, comprising a burner body 1, an ignition hole group (not shown in the figure), and an ignition induction needle 3. The burner body 1 consists of a burner head and a fire cover. The burner head can be cast as one piece, or it can include a separate burner head body and a gas distribution plate; the fire cover can be cast as one piece, or it can include a separate inner fire cover and an outer fire cover. The burner body 1 has five cavities, which include an inner ring air cavity 12, an inner air cavity 11, 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 the radial direction.

[0036] At the top center of the burner body 1, an inner fire hole group (not shown) is provided, connecting to the inner ring air cavity 12. Gas burns in the inner fire hole group, forming an inner ring fire (i.e., a small fire). A medium fire hole group is provided at the top of the burner body 1 or on the outer ring wall of the middle ring air cavity 13. The medium fire hole group is located outside the air outlet and connected to the middle ring air cavity 13. In this embodiment, the medium fire hole group is provided on the outer ring wall of the middle ring air cavity 13 as an example. Gas burns in the medium fire hole group, forming a medium ring fire (i.e., a medium fire). At the top or outer wall of the burner body 1, an outer fire hole group is provided, connecting to the outer ring air cavity 15. In this embodiment, the medium fire hole group is provided on the outer wall of the burner body 1 as an example. Gas burns in the outer fire hole group, forming an outer ring fire (i.e., a large fire). This shows that the burner is equipped with a three-ring fire layout, with evenly distributed firepower and high combustion thermal efficiency.

[0037] An air outlet (not shown) communicating with the inner air cavity 11 is provided at the top of the burner body 1. This outlet is located between the middle and inner fire hole groups. Secondary air, flowing upward from the inner air cavity 11 and the air outlet, is supplied radially outward from the inner fire ring and radially inward from the middle fire ring, ensuring more complete combustion of low and medium fires. The top opening of the outer air cavity 14 is located between the middle and outer fire hole groups. Secondary air, flowing upward from the top opening of the outer air cavity 14, is supplied radially outward from the middle fire ring and radially inward from the outer fire ring, ensuring more complete combustion of medium and high fires.

[0038] The burner body 1 is provided with an ignition hole group located below the air outlet. The inner air cavity 11 is connected to the inner ring air cavity 12 and / or the middle ring air cavity 13 through the ignition hole group. This embodiment uses the example of the inner air cavity 11 connecting to the inner ring air cavity 12 through the ignition hole group. The ignition sensing needle 3 is disposed within the inner air cavity 11 and below the air outlet. The exhaust 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 air outlet is located between the inner fire hole group and the middle fire hole group, the ignition flame is transmitted upward from the air outlet, quickly igniting the inner ring gas ejected from the inner fire hole group and the middle ring gas ejected from the middle fire hole group, thereby achieving the low and medium fire ignition functions. During the burner combustion process, the ignition sensing needle 3 can sense the low flame and medium fire fireworks through the air outlet above it, thus achieving the low and medium fire flame sensing functions. 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 also a flame sensing channel when the burner is working.

[0039] refer to Figure 1-3In this embodiment, an air hole group (not shown) is provided at the top of the burner body 1, located outside the inner fire hole group and connected to the inner air cavity 11. The air hole group constitutes an air outlet. Optionally, the air hole group includes at least one circle of air hole groups. In this embodiment, the number of air hole groups is three circles. Each circle of air hole groups is composed of a plurality of secondary air holes 1101 arranged at circumferential intervals. The secondary air holes 1101 serve as a secondary air supply channel during combustion. Therefore, by placing the ignition sensing needle 3 within the inner air cavity and below the air hole group, the ignition sensing needle 3 is hidden within the burner body 1, making the burner appearance simpler. Secondly, it prevents food from falling into the inner air cavity 11 and onto the ignition sensing needle 3 during cooking, effectively ensuring more reliable ignition and induction.

[0040] 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:

[0041] The first one, reference Figure 3 The bottom of the inner air cavity 11 is open to form a lower air vent 1103. The inner air cavity 11 is connected to the atmosphere at the bottom of the burner through the lower air vent 1103. At this time, the secondary air at the bottom of the burner flows into the inner air cavity 11 through the lower air vent 1103, 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 respectively. 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.

[0042] The second one, reference Figure 4 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. This connects the outer air cavity 14 to the atmosphere at the bottom of the burner via the secondary air passages 16, the inner air cavity 11, and the lower air vent 1103. Clearly, the secondary air in the inner and outer air cavities 11 and 14 originates from the same location: the atmosphere at the bottom of the burner.

[0043] The third type, reference Figure 5The difference from the first scenario is that the secondary air source of the inner air cavity 11 is different. In the third scenario, the inner air cavity 11 includes a lower storage cavity 111 and an upper air cavity 112 with an air outlet and connected to the ignition hole group. The bottom of the upper air cavity 112 is sealed. To facilitate the assembly of the ignition sensor needle 3, a mounting hole 1121 is provided at the bottom of the upper air cavity 112 for the ignition sensor needle 3 to pass through. The lower storage cavity 111 and the upper air cavity 112 are connected through the mounting hole 1121. The ignition sensor needle 3 is disposed in the lower storage cavity 111, and its upper end extends through the mounting hole 1121 and into the upper air cavity 112. Optionally, the hole wall of the mounting hole 1121 is sealed and connected to the ignition sensing needle 3 to ensure the airtightness of the fitting point between the hole wall of the mounting hole 1121 and the ignition sensing needle 3. Firstly, the atmosphere at the bottom of the burner cannot flow into the upper air cavity 112 through the lower placement cavity 111 and the fitting point in sequence; secondly, the overflow flowing into the upper air cavity 112 cannot flow downward into the bottom shell of the gas stove through the fitting point; thirdly, the combustion heat is prevented from being radiated into the bottom shell of the gas stove through the inner air cavity 11, thereby reducing the temperature rise inside the bottom shell of the gas stove.

[0044] Since the atmosphere at the bottom of the burner cannot flow into the upper air cavity 112 through the fitting, in order to provide secondary air to the upper air cavity 112, 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 and the middle ring air cavity 13, and each of which is connected to the outer air cavity 14 and the upper air cavity 112, respectively, so that the upper air cavity 112 and the outer air cavity 14 are both 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 upper air cavity 112 and the outer air cavity 14 comes from the same location, that is, from the external atmosphere outside the burner body 1. In addition, the secondary air channel 16 can be used as a drainage channel when overflow occurs, so as to facilitate the discharge of overflow from the upper air cavity 112 that flows into the outer air cavity 14 and / or the inner air cavity 11 outside the burner.

[0045] refer to Figure 1-3 The inner fire hole group includes a plurality of inner ring straight fire holes 121 arranged at intervals. 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, that is, the horizontal cross-sectional area of the secondary air hole 1101 is larger than the horizontal cross-sectional area of the inner ring straight fire hole 121, to ensure a larger secondary air unit ventilation area, so that both the inner ring fire and the middle ring fire can burn fully.

[0046] The middle fire hole group includes a plurality of middle ring fire holes 131 that are evenly spaced circumferentially. Each middle ring fire hole 131 is connected to the middle ring air cavity 13. In this embodiment, all the middle ring fire holes 131 are circumferentially spaced on the outer cavity wall of the middle ring air cavity 13 so that the middle ring air cavity 13 is connected to the outer air cavity 14 through the middle ring fire holes 131.

[0047] The outer fire hole group includes multiple 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, so that the inner ring fire is closer to the top opening of the outer air cavity 14.

[0048] refer to Figure 2 An external flame transfer structure (not shown) is provided on the top and outside of the burner body 1, communicating with the outer annular air cavity 15. This external flame transfer structure can be a radially arranged external flame transfer groove 172 communicating with the outer annular air cavity 15. The radial inner end of the external flame transfer groove 172 is adjacent to or connected to the top opening of the outer air cavity 14, while the radial outer end passes through the upper end of the outer cavity wall of the burner body 1 and is adjacent to or connected to the external flame hole group. Alternatively, the external flame transfer structure can be designed as a plurality of radially spaced external flame transfer holes, each communicating with the outer annular air cavity 15.

[0049] 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 or a medium fire.

[0050] 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 inner ring 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 outer ring 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.

[0051] Example 2

[0052] refer to Figure 7This embodiment differs from Example 1 in that the burner body further includes an internal flame transfer structure. A group of intermediate flame holes is disposed on the outer annular wall of the intermediate annular air cavity 13. An internal flame transfer structure (not shown) is provided at the top of the burner body 1, communicating with the intermediate annular air cavity 13. The radially inner end of the internal flame transfer structure is adjacent to or connected to the air outlet, while the radially outer end of the internal flame transfer structure is adjacent to or connected to the group of intermediate flame holes. Consequently, after the ignition sensor needle 3 hidden within the internal air cavity 11 successfully ignites, the ignition flame, as it propagates upward from the air hole group, rapidly ignites a small flame while simultaneously igniting a medium flame through the internal flame transfer structure.

[0053] Optionally, the internal flame transmission structure includes internal flame transmission grooves 171 arranged radially and connected to the central ring air cavity 13. The radial inner ends of the internal flame transmission grooves 171 are adjacent to or connected to the air hole group, while the radial outer ends extend through the upper end of the outer cavity wall of the central ring air cavity 13 and are adjacent to or connected to the central flame hole group. Of course, the internal flame transmission structure can also be designed as a plurality of internal flame transmission holes spaced apart in the radial direction.

[0054] Example 3

[0055] refer to Figure 7 This embodiment differs from Example 1 in the placement of the center fire hole group. In this embodiment, the center fire hole group is located at the top of the burner body 1 and outside the air hole group. The center fire hole group includes two or three rings of center fire hole groups. Each ring of center fire hole groups includes center ring fire holes 131 spaced evenly along the circumference. Each center ring fire hole 131 communicates with the center ring air cavity 13. This placement of the inner ring fire closer to the air hole group ensures that the secondary air ejected upward from the air hole group is better supplied to the inner side of the center fire, ensuring more complete combustion within the center fire. Furthermore, the ignition flame, when transmitted upward from the air hole group, ignites the center fire more quickly.

[0056] Example 4

[0057] 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 sensing 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 and the middle ring fire, but also there is no need to remove the fire cover, which is more convenient for the maintenance of the ignition sensing needle 3.

[0058] Example 5

[0059] refer to Figure 10This embodiment differs from any of Embodiments 1-4 in the structure and connection method of the ignition hole group. In this embodiment, the inner air cavity 11 is connected to the middle ring air cavity 13 via the ignition hole group. This allows for the utilization of a portion of the middle ring gas as ignition gas by connecting the outer ends of the ignition hole group to the middle ring air cavity 13. Compared to connecting 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.

[0060] 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 or a medium fire.

[0061] Optionally, the number of the middle ring ignition holes 22 is set to six, or of course, ten. Three or five of the middle ring ignition holes 22 are circumferentially spaced apart at the upper end of the outer ring wall of the inner air cavity 11 and arranged close to the air outlet to form upper ignition holes; another three or five middle ring ignition holes 22 are circumferentially spaced apart at the upper end of the outer ring 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. 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.

[0062] Example 6

[0063] refer to Figure 11 This embodiment differs from any of Embodiments 1-5 in the structure and connection method of the ignition hole groups. In this embodiment, the inner air cavity 11 is connected to the inner ring air cavity 12 and the middle ring air cavity 13 through the ignition hole groups. This allows for the utilization of both the inner ring gas and the middle ring gas as ignition gas, by connecting the ignition hole groups to the inner ring air cavity 12 and the middle ring air cavity 13. Compared to a case where the ignition hole groups 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 ignition success rate and ignition reliability.

[0064] The ignition hole group includes inner ring ignition holes 21, the number of which is set to three or five, and all middle ring ignition holes 22 are circumferentially spaced apart at the upper end of the inner cavity wall of the inner air cavity 11 and spaced apart in the circumferential direction. Each inner ring ignition hole 21 is arranged near the air outlet, and the inner ring air cavity 12 is connected to the inner air cavity 11 through the inner ring ignition hole 21. The ignition hole group also includes middle ring ignition holes 22, the number of which is set to three or five, and all middle ring ignition holes 22 are arranged at the upper end of the outer cavity wall of the inner air cavity 11 and spaced apart in the circumferential direction. Each middle ring ignition hole 22 is arranged near the air outlet, and the middle ring air cavity 13 is connected to the inner air cavity 11 through the middle ring ignition holes 22.

[0065] Optionally, the inner ring ignition hole 21 can be set above or below the middle ring ignition hole 22 to form upper and lower ignition holes, thereby forming upper and lower steps of ignition gas, and the lower ignition hole can act as a flame stabilizing hole, making the ignition reliability and success rate higher.

[0066] 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 high efficiency burner, characterized in that: include: A burner body (1) is provided with an inner ring air cavity (12), an inner air cavity (11), 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, and 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, arranged on the burner body (1) and located below the air outlet, the inner air cavity (11) being connected to the inner ring air cavity (12) and / or the middle ring air cavity (13) through the ignition hole group; and An ignition sensing needle (3) is disposed in the inner air cavity (11) and below the air outlet, with the air outlet direction of the ignition hole group facing the ignition sensing needle (3); The ignition hole group includes an inner ring ignition hole (21) and / or a middle ring ignition hole (22), wherein the inner ring ignition hole (21) is arranged on the inner ring wall of the inner ring air cavity (12), and the inner ring air cavity (12) is connected to the inner air cavity (11) through the inner ring ignition hole (21); and the middle ring ignition hole (22) is arranged on the outer ring wall of the inner ring air cavity (12), and the middle ring air cavity (13) is connected to the inner air cavity (11) through the middle ring ignition hole (22).

2. A high efficiency 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 of the inner ring wall of the inner ring air cavity (12); 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 of the outer ring wall of the inner ring air cavity (12).

3. A high efficiency 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 high efficiency burner according to claim 3, characterized in that: The air hole group comprises at least one circle of air hole groups, the sub-air hole group being composed of a plurality of secondary air holes (1101) arranged at intervals in the circumferential direction; and the inner fire hole group comprises a plurality of inner ring straight fire holes (121) arranged at intervals.

5. A high efficiency burner according to claim 4, characterized in that: The horizontal cross-sectional area of the secondary air hole (1101) is larger than the horizontal cross-sectional area of the inner ring straight fire hole (121).

6. A high efficiency burner according to claim 1 or 3, characterized in that: The bottom of the inner air cavity (11) is open to form a lower vent (1103) for secondary air to pass through, and the lower vent (1103) is connected to the inner air cavity (11); The burner body (1) further has a transversely arranged secondary air passage (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 passage (16).

7. A high efficiency burner according to claim 1 or 3, characterized in that: The inner air cavity (11) comprises a lower placement cavity (111) and an upper air cavity (112) having the air outlet and communicating with the ignition hole group, a mounting hole (1121) for the ignition sensing needle (3) to pass through is provided at the bottom of the upper air cavity (112), and the lower placement cavity (111) and the upper air cavity (112) are communicated with each other through the mounting hole (1121); The ignition sensing needle (3) is arranged in the lower placement cavity (111), and its upper end passes through the mounting hole (1121) and extends into the upper air cavity (112).

8. A high efficiency burner according to claim 7, characterized in that: 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 upper air cavity (112).

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

10. A high efficiency burner according to claim 9, characterized in that: The middle fire hole group is arranged on the outer ring wall of the middle ring air cavity (13), and an inner fire transfer structure connected to the middle ring air cavity (13) is provided on the top of the burner body (1), the radial inner end of the inner fire transfer structure is close to or connected to the air outlet, and the radial outer end of the inner fire transfer structure is close to or connected to the middle fire hole group.

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