A method for improving the ignition success rate of a burner

Abstract

The present application relates to a kind of methods for improving the ignition success rate of burner, the burner includes burner head, center fire cover, ignition needle, thermocouple and mounting seat, the center fire cover is covered on the burner head, and is formed with accommodating cavity in middle, the mounting seat is fixed in the bottom of burner head, the ignition needle and thermocouple are all set on the mounting seat;The ignition needle and thermocouple at least have part in the accommodating cavity, and are located below the center fire cover;The ignition needle and / or thermocouple can be moved up and down in its axial direction, and carry out the height adjustment.The burner provided by the present application, the ignition needle and thermocouple can be adjusted in height, so as to realize corresponding adjustment to the discharge distance of ignition needle and the feeling flame distance of thermocouple according to different use conditions, further improve the success rate of ignition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas stoves, in particular to a method for improving the ignition success rate of a burner. BACKGROUND

[0002] In existing gas stoves, the ignition needle and thermocouple are usually fixedly installed, that is, the height of the ignition needle / thermocouple cannot be adjusted, and it is also not conducive to disassembling the ignition needle / thermocouple. Therefore, Chinese Patent CN211476001U discloses a burner head ignition needle lifting device, which specifically discloses that "by setting a limiting shaft table on the ignition needle, and setting a spring between the limiting shaft table and the fixed support, the ignition needle can have a telescopic function, and the installation and removal of the ignition needle lifting device are facilitated, and the user's use is facilitated".

[0003] The ignition needle in the above-mentioned patent is provided with a spring on its surface, which achieves a certain adjustment function. However, as the use time increases, the spring force will decrease relatively with time, thereby reducing the adjustment effect. Moreover, due to the spring force, the ignition needle is prone to shaking during use, thereby resulting in unsatisfactory ignition effect. At the same time, the ignition needle needs to be pressed down by the finger, so that the spring is contracted, thereby driving the ignition needle to descend. When the hand is released, the spring expands, and the ignition needle returns to the original height. However, in actual use, the user cannot always press the ignition needle down with the hand, otherwise accidents such as burns and scalds are likely to occur, which results in the great disadvantages of the method of maintaining the height adjustment of the ignition needle by external force.

[0004] In addition, in the patent, the ignition needle is installed on the side of the burner head relatively close to the outside. During cooking, it is extremely easy for soup, foreign matter, etc. to drop onto the needle, or to be affected by external factors such as wind, thereby causing the flameout during cooking, which affects the user's use.

[0005] Therefore, it is necessary to improve the prior art, and provide a burner and stove which can conveniently disassemble and assemble the ignition needle and / or thermocouple, and can conveniently adjust the height of the ignition needle and / or thermocouple, and has better ignition effect. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a burner and stove which can conveniently adjust the height and has better ignition effect.

[0007] In order to solve the above technical problems, the technical solution used by the present application is:

[0008] The application discloses a method for improving the ignition success rate of a burner, and belongs to the technical field of burners.

[0009] Preferably, the ignition needle and / or the thermocouple are axially adjusted at least at three heights, when the ignition needle is at the first height, the discharge end of the ignition needle and the air outlet hole of the center fire cap form a first distance; when the ignition needle is at the second height, the discharge end of the ignition needle and the air outlet hole of the center fire cap form a second distance; when the ignition needle is at the third height, the discharge end of the ignition needle and the air outlet hole of the center fire cap form a third distance; the first distance is greater than the second distance, and the second distance is greater than the third distance.

[0010] Preferably, the line between the center point of the top end face of the ignition needle and the center point of the end face of the air outlet hole is the distance between the discharge end of the ignition needle and the air outlet hole of the center fire cap; the first distance, the second distance and the third distance are all the distances between the discharge end of the ignition needle and the air outlet hole of the center fire cap.

[0011] Preferably, the first distance is 5.5-6.5mm, the second distance is 4-5mm, and the third distance is 2.5-3.5mm.

[0012] Preferably, the mounting seat is provided with a clamping groove, and the ignition needle and / or the thermocouple are provided with a protrusion matched with the clamping groove, or;

[0013] The mounting seat is provided with a protrusion, and the ignition needle and / or the thermocouple are provided with a clamping groove matched with the protrusion.

[0014] The protrusion can be inserted into the clamping groove, so that the height of the ignition needle and / or the thermocouple is fixed; the clamping groove and / or the protrusion are at least three, and the three clamping grooves and / or the three protrusions are arranged at intervals along the height direction of the mounting seat.

[0015] Preferably, the mounting base comprises a first bracket and a second bracket connected detachably, the ignition needle and / or thermocouple is arranged between the first bracket and the second bracket; the first bracket and the second bracket are respectively provided with a clamping groove, the ignition needle and / or thermocouple is provided with a protrusion on the outer surface, the protrusion is arranged around the ignition needle and / or thermocouple, when the first bracket and the second bracket are connected, the protrusion can be inserted into the clamping groove, so that the height of the ignition needle and / or thermocouple is fixed; when the first bracket and the second bracket are separated, the height of the ignition needle and / or thermocouple can be adjusted.

[0016] Preferably, the central fire cover is provided with a guide boss extending into the accommodating cavity, and the discharge end of the ignition needle can be oriented to discharge towards the guide boss.

[0017] Preferably, the central fire cover is provided with at least one gas outlet hole communicating with the accommodating cavity, the gas outlet hole is arranged obliquely towards the accommodating cavity, the discharge direction of the discharge end of the ignition needle towards the guide boss and the gas outlet direction of the gas outlet hole are arranged crossly, and the included angle between the discharge direction and the gas outlet direction is α, 0°<α<90°.

[0018] Preferably, the burner head is provided with a positioning groove, and the central fire cover is provided with a positioning block; or, the burner head is provided with a positioning block, and the central fire cover is provided with a positioning groove; the positioning block and the positioning groove are matched and connected, and when the central fire cover is arranged on the burner head, the positioning block can be inserted into the positioning groove, so that the central fire cover and the burner head are fixed.

[0019] The burner further comprises an outer fire cover connected with the burner head, the outer fire cover is arranged at the outer side of the central fire cover in a spaced manner, a first gas mixing chamber is formed between the burner head and the outer fire cover, a second gas mixing chamber is formed between the burner head and the central fire cover, the second gas mixing chamber communicates with the accommodating cavity; the burner head is further provided with a first ejecting pipe and a second ejecting pipe, the first ejecting pipe and the second ejecting pipe are arranged to extend outwardly relative to the burner head, the first ejecting pipe communicates with the first gas mixing chamber, and the second ejecting pipe communicates with the second gas mixing chamber.

[0020] A stove comprises a panel, and further comprises the burner according to any one of the preferred embodiments, and the panel is provided with a mounting position, and the burner head is connected with the panel through the mounting position.

[0021] The beneficial effects of the present application mainly embody: first, by hiding the ignition needle and thermocouple in the accommodating cavity below the center fire cover, the situation of unsuccessful ignition of the ignition needle or extinguishing in the middle caused by wind blowing and soup splashing can be avoided; meanwhile, the gas concentration during ignition can be improved, and the success rate of ignition is effectively improved. Second, the ignition needle and thermocouple can be adjusted in height, so that the discharge distance of the ignition needle and the flame sensing distance of the thermocouple can be adjusted correspondingly according to different use conditions, and the success rate of ignition is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and other objects, features and advantages of the present application will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the present application.

[0023] Figure 1 It is an explosion structure schematic view of the burner in the present application;

[0024] Figure 2 It is a cross-sectional view structure schematic view of the burner in the present application;

[0025] Figure 3 It is a distance relationship schematic view between the discharge end of the ignition needle and the gas outlet hole of the center fire cover in the present application;

[0026] Figure 4 It is a relationship schematic view between the discharge direction of the ignition needle and the gas outlet direction of the gas outlet hole in the present application;

[0027] Figure 5 It is a whole structure schematic view of the center fire cover in the present application;

[0028] Figure 6 It is a whole structure schematic view of the burner head in the present application;

[0029] Figure 7 It is an explosion structure schematic view of the mounting seat, ignition needle and thermocouple in the present application.

[0030] In the drawing: burner head 1, accommodating cavity 10, positioning groove 11, first injection pipe 12, second injection pipe 13, center fire cover 2, guide boss 20, gas outlet hole 21, positioning block 22, second gas mixing chamber 23, fire transmission groove 24, cover plate 25, connecting column 26, smoke exhaust passage 27, ignition needle 3, protruding block 30, thermocouple 4, mounting seat 5, clamping groove 50, first support 51, second support 52, locking piece 53, outer fire cover 6, first gas mixing chamber 60. DETAILED DESCRIPTION

[0031] For the purpose of facilitating the understanding of the present application, a more comprehensive description will be made below with reference to the relevant drawings.

[0032] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated as a whole, or a middle element can exist at the same time. The terms "mount", "one end", "the other end" and the like used herein are only for illustrative purposes.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this technology belongs. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0034] Reference Figures 1-7 , the present application provides a method for improving the ignition success rate of a burner, which comprises a burner head 1, a center fire cover 2, an ignition needle 22, a thermocouple 4 and a mounting seat 5, the center fire cover 2 is covered on the burner head 1 and forms a containing cavity 10 in the middle, the mounting seat 5 is fixed on the bottom of the burner head 1, the ignition needle 22 and the thermocouple 4 are both arranged on the mounting seat 5; at least part of the ignition needle 22 and the thermocouple 4 are located in the containing cavity 10 and below the center fire cover 2; the ignition needle 22 / thermocouple 4 of the current market stove is separately fixed on a mounting hole of the burner head 1, which causes great inconvenience during disassembly and assembly. In the present embodiment, the ignition needle 22 and the thermocouple 4 are integrally arranged on the mounting seat 5, which is more conducive to the disassembly, assembly and adjustment of the ignition needle 22 and the thermocouple 4. At the same time, the mounting seat 5 is arranged on the bottom of the burner head 1, which does not affect the normal use of the stove on the one hand, and is convenient for the user to adjust / disassemble the position of the ignition needle 22 and the thermocouple 4 on the other hand. In the present embodiment, the mounting seat 5 can be fixed on the bottom of the burner head 1 by means of fastening bolts, which is convenient for disassembly and assembly. In addition, the ignition needle 22 and the thermocouple 4 are arranged in the containing cavity 10 and below the center fire cover 2, which can be protected by the center fire cover 2, avoiding the situation that the ignition needle 22 / thermocouple 4 is splashed by foreign matters such as soup during cooking, resulting in the out-of-service situation. The ignition needle 22 and / or the thermocouple 4 can move up and down in the axial direction and adjust the height (refer to Figure 2 , the axial direction refers to the height direction of the ignition needle 22 / thermocouple 4, i.e. the up-down direction in Figure 2 ). That is to say, the ignition needle 22 and / or the thermocouple 4 can be relatively raised or lowered in the containing cavity 10. By adjusting the corresponding height, the discharge arc of the ignition needle 22 and the flame sensing distance of the thermocouple 4 can be further accurately controlled, so as to improve the ignition success rate and avoid the out-of-service situation during use.

[0035] Compared with the burner in the prior art, the burner provided by the application has the following beneficial effects:

[0036] First, by hiding the ignition needle 22 and the thermocouple 4 in the accommodating cavity 10 below the central fire cap 2, the situation that the ignition needle 22 fails to ignite or is extinguished halfway due to wind blowing or soup splashing can be avoided; meanwhile, the gas concentration during ignition can be improved, and the success rate of ignition is effectively improved. Second, the height of the ignition needle 22 and the thermocouple 4 can be adjusted accordingly, so that the discharge distance of the ignition needle 22 and the flame sensing distance of the thermocouple 4 can be adjusted correspondingly according to different use conditions, and the success rate of ignition is further improved.

[0037] Reference Figure 2 and 3 In the preferred embodiment, the ignition needle 22 and / or the thermocouple 4 have at least three height adjustments in the axial direction. When the ignition needle 22 is at the first height, the discharge end (i.e., the top end of the ignition needle) of the ignition needle 22 and the gas outlet hole 21 of the central fire cap 2 form a first distance. When the ignition needle 22 is at the second height, the discharge end of the ignition needle 22 and the gas outlet hole 21 of the central fire cap 2 form a second distance. When the ignition needle 22 is at the third height, the discharge end of the ignition needle 22 and the gas outlet hole 21 of the central fire cap 2 form a third distance. The first distance is greater than the second distance, and the second distance is greater than the third distance.

[0038] Specifically, since the ignition needle 22 is powered by a battery, the battery power will decrease over time. Due to the problem of power supply, the arc intensity of the ignition needle 22 will be greatly weakened after the battery power decreases, which may result in difficult ignition. In this case, the height of the ignition needle 22 can be adjusted to shorten the ignition distance, thereby solving the problem and improving the success rate of ignition. Similarly, the flame sensing distance of the thermocouple 4 also has a relatively high requirement for the stability of the flame during combustion. If the flame is unstable and cannot burn to the flame sensing end of the thermocouple 4, it is easy to determine that the flame is accidentally extinguished, which may result in automatic gas pressure cut-off and automatic gas-off, thereby greatly affecting the user experience. Therefore, the height adjustment of the thermocouple 4 is also very important.

[0039] In this embodiment, when the ignition needle 22 and / or thermocouple 4 are at three different heights, they represent three different states of the battery (i.e., fully charged, half-charged, and low-charged). When the battery is fully charged, the arc intensity of the ignition needle 22 is strongest, and the distance between the discharge end of the ignition needle 22 and the vent 21 of the center burner cap 2 (i.e., the first distance) is the greatest, with the ignition needle 22 at the first height. When the battery is half-charged, the power supply is slightly insufficient, and the arc intensity of the ignition needle 22 is weaker. Therefore, the ignition needle 22 can be raised by one height (i.e., the second height) to shorten the distance between the discharge end of the ignition needle 22 and the vent 21 of the center burner cap 2 (i.e., the second distance) before discharging, thus ensuring that the arc emitted from the discharge end of the ignition needle 22 can successfully ignite. When the battery is low-charged, the arc intensity of the ignition needle 22 is weakest. Therefore, the ignition needle 22 can be raised by another height (i.e., the third height) to further shorten the distance between the discharge end of the ignition needle 22 and the vent 21 of the center burner cap 2 (i.e., the third distance) before discharging, thus ensuring that the arc emitted from the discharge end of the ignition needle 22 can successfully ignite.

[0040] In this embodiment, by setting these three optimal distances to match the three different states of the battery, a precise control effect is achieved. During use, the user can directly select three different heights to adjust the height of the ignition needle 22 according to the different battery charge states. This makes the user's operation more convenient and greatly improves the ignition success rate. Therefore, this technology is also one of the main inventive points of this invention.

[0041] refer to Figure 3 In a preferred embodiment, the line connecting the center point of the top end face of the ignition needle 22 and the center point of the end face of the vent 21 is the distance between the discharge end of the ignition needle 22 and the vent 21 of the central flame cap 2; for ease of understanding, refer to... Figure 3 The center point of the top end face of the ignition needle 22 refers to the midpoint position on the central axis of the ignition needle 22 (specifically...). Figure 3 The positions indicated by A1, A2, and A3 are the center points of the top end face of the ignition needle 22. The center point of the end face of the vent 21 of the center flame cap 2 is the center point of the end face of the vent 21 closest to the receiving cavity 10 (i.e., Figure 3 (The position indicated by point B in the middle); the lines connecting the center point of the top end face of the ignition needle 22 and the center point of the end face of the vent 21 are L1, L2, and L3, respectively. The first distance (L3), the second distance (L2), and the third distance (L1) all refer to the distance between the discharge end of the ignition needle 22 and the vent 21 of the center flame cap 2, that is, L3 > L2 > L1.

[0042] In the preferred embodiment, the first distance is 5.5-6.5mm, the second distance is 4-5mm, and the third distance is 2.5-3.5mm. In the embodiment, the first distance can be 5.5mm, 6mm, or 6.5mm, preferably 6mm; the second distance can be 4mm, 4.5mm, or 5mm, preferably 4.5mm; and the third distance can be 2.5mm, 3mm, or 3.5mm, preferably 3mm. The preferred distances in the embodiment are the best ignition distances after testing, which match the three different power states (full power, half power, and low power) of the battery, so that the user can directly adjust the control according to the actual situation, improve the ignition success rate, and achieve the effect of precise control.

[0043] Reference Figure 2 and 7 In the preferred embodiment, the mounting seat 5 is provided with a clamping groove 50, and the ignition needle 22 and / or the thermocouple 4 is provided with a protrusion 30 matched with the clamping groove 50, or

[0044] The mounting seat 5 is provided with a protrusion 30, and the ignition needle 22 and / or the thermocouple 4 is provided with a clamping groove 50 matched with the protrusion 30;

[0045] The protrusion 30 can be inserted into the clamping groove 50 to fix the height of the ignition needle 22 and / or the thermocouple 4. The clamping groove 50 and / or the protrusion 30 are at least three, and the three clamping grooves 50 and / or protrusions 30 are spaced apart along the height direction of the mounting seat 5. In the embodiment, the mounting seat 5 can facilitate the overall disassembly or installation of the ignition needle 22 and the thermocouple 4. The three clamping grooves 50 correspond to the three adjustable heights, so when the height of the ignition needle 22 or the thermocouple 4 needs to be adjusted, the protrusion 30 only needs to be inserted into the clamping groove 50 of the corresponding height, which is very convenient to operate.

[0046] Reference Figure 7 In the preferred embodiment, the mounting seat 5 includes a first bracket 51 and a second bracket 52 connected detachably, and the first bracket 51 and the second bracket 52 can be locked by a locking member 53. The ignition needle 22 and / or the thermocouple 4 is placed between the first bracket 51 and the second bracket 52. The first bracket 51 and the second bracket 52 are respectively provided with clamping grooves 50, and the ignition needle 22 and / or the thermocouple 4 is provided with protrusions 30 around the ignition needle 22 and / or the thermocouple 4. When the first bracket 51 and the second bracket 52 are connected, the protrusions 30 can be inserted into the clamping grooves 50 to fix the height of the ignition needle 22 and / or the thermocouple 4. When the first bracket 51 and the second bracket 52 are separated, the height of the ignition needle 22 and / or the thermocouple 4 can be adjusted.

[0047] When installing, the ignition needle 22 and / or the thermocouple 4 are placed between the first bracket 51 and the second bracket 52, according to the height required to be set, the protrusions 30 on the ignition needle 22 and / or the thermocouple 4 are inserted into the clamping grooves 50 on the brackets, and then the first bracket 51 and the second bracket 52 are locked by the locking member 53, at this time the ignition needle 22 and the thermocouple 4 are fixed on the mounting seat 5. When it is required to adjust the height of the ignition needle 22 or the thermocouple 4, only need to unscrew the locking member 53, so that the first bracket 51 and the second bracket 52 are separated, at this time the ignition needle 22 or the thermocouple 4 is in a freely movable state, then the protrusions 30 are inserted into the clamping grooves 50 at different heights, so that the height adjustment of the ignition needle 22 or the thermocouple 4 can be realized, and finally the locking member 53 is locked and fixed.

[0048] With reference to Figure 4 and 5 In the preferred embodiment, the central fire cap 2 is provided with a guide boss 20 extending into the accommodating cavity 10, and the discharge end of the ignition needle 22 can be oriented to discharge towards the guide boss 20. By providing the guide boss 20, when the discharge end of the ignition needle 22 discharges, the electric arc directly hits the position of the boss, thereby forming directional discharge, and the ignition effect is better.

[0049] With reference to Figure 4 and 5 In the preferred embodiment, the central fire cap 2 is provided with at least one gas outlet hole 21 communicating with the accommodating cavity 10, the gas outlet hole 21 is obliquely arranged towards the accommodating cavity 10, the discharge direction of the discharge end discharging towards the guide boss 20 and the gas outlet direction of the gas outlet hole 21 are cross arranged Figure 4 The directions indicated by the arrows are the discharge direction and the gas outlet direction respectively); the included angle between the discharge direction and the gas outlet direction is α, 0°<α<90°. With reference to Figure 4 Since the direction of the electric arc discharge of the discharge end of the ignition needle 22 is upward, when the electric arc hits the guide boss 20, it just forms a cross with the gas outlet direction of the gas outlet hole 21, and the cross angle between the two is α (see Figure 4 By the cross arrangement, the contact area between the electric arc and the gas is further increased, and the directional discharge formed by the arrangement of the guide boss 20 makes the ignition effect better. If there is no boss, the electric arc will be randomly radiated during use, causing the ignition effect to be reduced.

[0050] With reference to Figure 4 and 5In a further preferred embodiment, a cover plate 25 and a connecting column 26 are arranged above the center fire cover 2, the two ends of the connecting column 26 are connected with the cover plate 25 and the center fire cover 2 respectively, a smoke exhaust passage 27 is arranged between the cover plate 25 and the center fire cover 2, the smoke exhaust passage 27 is connected with the accommodating cavity 10, the diameter of the cover plate 25 is larger than the outer diameter of the accommodating cavity 10, so as to protect the ignition needle 22 and the thermocouple 4, and avoid the ignition needle 22 and the thermocouple 4 from being affected by external factors.

[0051] With reference to Figure 5 And 6 In a preferred embodiment, a positioning slot 11 is arranged on the burner head 1, and a positioning block 22 is arranged on the center fire cover 2, or a positioning block 22 is arranged on the burner head 1, and a positioning slot 11 is arranged on the center fire cover 2, the positioning block 22 and the positioning slot 11 are matched and connected, when the center fire cover 2 is arranged on the burner head 1, the positioning block 22 can be inserted into the positioning slot 11, so as to fix the center fire cover 2 and the burner head 1, in this embodiment, the positioning block 22 and the positioning slot 11 are matched, so as to prevent the center fire cover 2 and the burner head 1 from being installed incorrectly, and the center fire cover 2 and the burner head 1 can be quickly and accurately installed.

[0052] With reference to Figure 1 And 7 In a further preferred embodiment, the burner further comprises an outer fire cover 6 connected with the burner head 1, the outer fire cover 6 is arranged on the outer side of the center fire cover 2 in a spaced manner, a first mixing chamber 60 is formed between the burner head 1 and the outer fire cover 6, a second mixing chamber 23 is formed between the burner head 1 and the center fire cover 2, the second mixing chamber 23 is connected with the accommodating cavity 10, a first injection pipe 12 and a second injection pipe 13 are further arranged on the burner head 1, the first injection pipe 12 and the second injection pipe 13 extend outward relative to the burner head 1, the first injection pipe 12 is connected with the first mixing chamber 60, and the second injection pipe 13 is connected with the second mixing chamber 23. The injection pipe is used for connecting a gas source, and the gas enters the mixing chamber through the injection pipe.

[0053] With reference to Figure 1 And 5 In a further preferred embodiment, a fire transmission groove 24 is further arranged on the center fire cover 2 and the outer fire cover 6 respectively, the fire transmission groove 24 extends along the radial direction of the center fire cover 2 and the outer fire cover 6, and is connected with the gas outlet hole 21 of the center fire cover 2 and the outer fire cover 6. The fire transmission groove 24 mainly plays a role of fire transmission, and the ignition effect is further improved by arranging the fire transmission groove 24 on the center fire cover 2 and the outer fire cover 6, so that the fire transmission speed is faster.

[0054] A stove comprises a panel (not shown in the figure), and further comprises the burner as described in any one of the above preferred embodiments, and a mounting position (not shown in the figure) is arranged on the panel, and the burner head 1 is connected with the panel through the mounting position.

[0055] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A method for improving the ignition success rate of a burner, characterized in that: The burner includes a burner head, a central flame cap, an ignition needle, a thermocouple, and a mounting base. The central flame cap covers the burner head and forms a receiving cavity in the middle. The mounting base is fixed to the bottom of the burner head. The ignition needle and thermocouple are both disposed on the mounting base. At least a portion of the ignition needle and thermocouple are located within the receiving cavity and below the central flame cap. The ignition needle and thermocouple are movable up and down in their axial direction and their height can be adjusted. The central flame cap is provided with at least one vent that communicates with the receiving cavity, and the vent is inclined toward the receiving cavity; The ignition needle and thermocouple are adjustable in at least three axial heights. When the ignition needle is at a first height, a first distance is formed between its discharge end and the vent of the central burner cap. When the ignition needle is at a second height, a second distance is formed between its discharge end and the vent of the central burner cap. When the ignition needle is at a third height, a third distance is formed between its discharge end and the vent of the central burner cap. The first distance is greater than the second distance, and the second distance is greater than the third distance. The ignition needle is powered by a battery; when the battery is fully charged, the ignition needle is controlled at a first height; when the battery is half-charged, the ignition needle is controlled at a second height; when the battery is low on power, the ignition needle is controlled at a third height.

2. The method for improving the ignition success rate of a burner as described in claim 1, characterized in that, The line connecting the center point of the top end face of the ignition needle and the center point of the end face of the vent hole is the distance between the discharge end of the ignition needle and the vent hole of the central flame cap.

3. The method for improving the ignition success rate of a burner as described in claim 2, characterized in that, The first distance is 5.5-6.5 mm, the second distance is 4-5 mm, and the third distance is 2.5-3.5 mm.

4. The method for improving the ignition success rate of a burner as described in claim 1, characterized in that, The mounting base is provided with a slot, and the ignition needle and / or thermocouple are provided with a protrusion that mates with the slot, or; The mounting base is provided with a protrusion, and the ignition needle and / or thermocouple is provided with a groove that mates with the protrusion; The protrusion can be inserted into the slot to fix the height of the ignition needle and the thermocouple; there are at least three slots and / or protrusions, and the three slots and / or protrusions are respectively spaced apart along the height direction of the mounting base.

5. The method for improving the ignition success rate of a burner as described in claim 1, characterized in that, The mounting base includes a detachably connected first bracket and a second bracket, with the ignition needle and / or thermocouple positioned between the first bracket and the second bracket. The first bracket and the second bracket are each provided with a slot, and the ignition needle and / or thermocouple have protrusions on their outer surfaces, the protrusions surrounding the ignition needle and / or thermocouple. When the first bracket and the second bracket are connected, the protrusions can be inserted into the slots to fix the height of the ignition needle and / or thermocouple. When the first bracket and the second bracket are separated, the height of the ignition needle and / or thermocouple can be adjusted.

6. The method for improving the ignition success rate of a burner as described in claim 1, characterized in that, The central flame cap is provided with a guide protrusion extending into the receiving cavity, and the discharge end of the ignition needle can discharge in a directional manner toward the guide protrusion.

7. The method for improving the ignition success rate of a burner as described in claim 6, characterized in that, The discharge direction of the discharge end towards the guide boss and the venting direction of the vent are intersected; the angle formed by the intersection of the discharge direction and the venting direction is α, where 0° < α < 90°.

8. The method for improving the ignition success rate of a burner as described in claim 1, characterized in that, The burner head is provided with a positioning groove, and the center burner cover is provided with a positioning block; or, the burner head is provided with a positioning block, and the center burner cover is provided with a positioning groove; the positioning block and the positioning groove are matched and connected, and when the center burner cover is placed on the burner head, the positioning block can be inserted into the positioning groove to fix the center burner cover to the burner head. The burner also includes an outer flame cap connected to the burner head, the outer flame cap being spaced apart outside the central flame cap, a first mixing chamber being formed between the burner head and the outer flame cap, and a second mixing chamber being formed between the burner head and the central flame cap, the second mixing chamber being in communication with the receiving cavity; the burner head is also provided with a first ejector tube and a second ejector tube, the first ejector tube and the second ejector tube being extended outward relative to the burner head, the first ejector tube being in communication with the first mixing chamber, and the second ejector tube being in communication with the second mixing chamber.

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