Upper air inlet burner capable of being independently controlled in partition mode

Abstract

The utility model discloses an upper air inlet burner capable of being independently controlled in a zoning mode, which comprises a base and a support, the support is arranged on the base, an outer-layer annular groove, a middle annular groove and an inner-layer annular groove are sequentially arranged on the support from the outer edge to the center, a first air inlet nozzle, a second air inlet nozzle and a third air inlet nozzle are arranged on the base, and the first air inlet nozzle, the second air inlet nozzle and the third air inlet nozzle are arranged on the support. The support is provided with an outer-layer injection pipe communicated with the outer-layer annular groove, a middle injection pipe communicated with the middle annular groove and an inner-layer injection pipe communicated with the inner-layer annular groove, and the support is provided with a first air port, a second air port and a third air port which are connected with an external air source. According to the present invention, the first gas port communicates with the outer layer annular groove, the second gas port communicates with the middle annular groove, the third gas port communicates with the inner layer annular groove, and the first gas port, the second gas port and the third gas port are respectively connected with the external gas source; therefore, fire outlet of the inner-layer annular groove, the middle annular groove and the outer-layer annular groove can be independently controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to an upper air inlet burner which can be controlled independently by partition. Background Art

[0002] Currently, most household gas burners are atmospheric burners, also known as partially premixed burners. Their operating principle is as follows: Gas, under a certain pressure and at a certain velocity, flows from a nozzle into an ejector tube. The ejector tube, powered by the gas's own energy, draws in a certain amount of surrounding air, known as "primary air." The primary air and gas mix in the ejector tube and the burner's mixing chamber before flowing out through the flame holes and burning. During the combustion process, air surrounding the flame is drawn in to aid combustion, known as "secondary air."

[0003] After searching, the structure of the current atmospheric air intake burner refers to an upper air intake burner provided by the Chinese utility model patent (authorization announcement number: CN216384171U), which includes a base and a bracket. The bracket is fixedly connected to the base. An outer annular groove, an intermediate annular groove and an inner annular groove are arranged on the bracket from the outer edge to the center. An unobstructed central through hole is arranged in the center of the bracket. A first air intake nozzle, a second air intake nozzle and a central air intake nozzle are arranged on the side of the base. A first ejector tube connected to the first air intake nozzle, a second ejector tube connected to the second air intake nozzle and a central ejector tube connected to one end of the central air intake nozzle are arranged at the bottom of the bracket. The second ejector tube and the first ejector tube are connected to the outer annular groove, and the outer annular groove is connected to the intermediate annular groove. The central ejector tube is a J-shaped structure. The central ejector tube is located on the side of the central through hole. A central ejection outlet connected to the other end of the central ejector tube is provided in the inner annular groove.

[0004] The outer annular groove of the above-mentioned prior art is connected to the middle annular groove, so that the middle annular groove and the outer annular groove are both supplied with air through the first ejection tube and the second ejection tube. In addition, the central ejection tube is connected to the inner annular groove, so that the inner annular groove is supplied with air through the central ejection tube, so that the activity of the inner annular groove is independently controlled by the central ejection tube, and the outer annular groove and the middle annular groove are simultaneously controlled by the first ejection tube and the second ejection tube.

[0005] Therefore, there is a problem with the above-mentioned prior art. The above-mentioned prior art belongs to a three-ring fire burner, but the three partitions of the three-ring fire cannot be controlled individually. Although the inner annular groove can be controlled individually, the outer annular groove and the middle annular groove can only be opened and closed at the same time. Therefore, the three-ring fire in the prior art cannot realize individual control of each partition, which leads to fewer fire output control modes when the burner is in use. There are only three modes: opening the fire of the inner annular groove alone, opening the fire of the middle annular groove and the outer annular groove alone, and opening the fire of the inner annular groove, the middle annular groove and the outer annular groove at the same time. There are fewer modes for controlling the fire output, so this shortcoming needs to be improved urgently. Utility Model Content

[0006] The purpose of the present invention is to solve the above problems. The present invention provides an upper air inlet burner which can be independently controlled by partitions and has the advantage of more optional fire output modes.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: it includes a base and a bracket, the bracket is arranged on the base, and an outer annular groove, an intermediate annular groove and an inner annular groove are arranged on the bracket in sequence from the outer edge to the center, the base is provided with a first air inlet nozzle, a second air inlet nozzle and a third air inlet nozzle, the bracket is respectively provided with an outer ejection tube connected to the outer annular groove, an intermediate ejection tube connected to the intermediate annular groove and an inner ejection tube connected to the inner annular groove, the first air inlet nozzle corresponds to the outer ejection tube, the second air inlet nozzle corresponds to the intermediate ejection tube, the third air inlet nozzle corresponds to the inner ejection tube, the bracket is provided with a first air port, a second air port and a third air port respectively connected to the air source, the first air port is connected to the first air inlet nozzle through a first channel, the second air port is connected to the second air inlet nozzle through a second channel, and the third air port is connected to the third air inlet nozzle through a third channel.

[0008] Preferably, the first air inlet nozzle includes a first outer air inlet nozzle and a second outer air inlet nozzle, the outer ejector tube includes a first outer ejector tube and a second outer ejector tube respectively connected to the outer annular groove, the first outer air inlet nozzle corresponds to the first outer ejector tube, the second outer air inlet nozzle corresponds to the second outer ejector tube, and the air outlet end of the first outer ejector tube and the air outlet end of the second outer ejector tube extend in the same clockwise direction in the outer annular groove.

[0009] Preferably, the bracket is provided with an inner ventilation annular groove located between the middle annular groove and the inner annular groove, and the bracket is also provided with a through hole passing through the bottom of the bracket, and the through hole connects the inner ventilation annular groove with the outside air.

[0010] Preferably, the bracket is further provided with an outer ventilation annular groove located between the outer annular groove and the middle annular groove, and an air vent is provided on the outer edge of the bracket which passes through the outer ventilation annular groove, and the air vent connects the outer ventilation annular groove with the outside air.

[0011] Preferably, the bracket is provided with a first annular step, a second annular step and a third annular step, the first annular step is provided with an outer annular fire cover which is arranged above the outer annular groove, the second annular step is provided with an intermediate annular fire cover which is arranged above the intermediate annular groove, and the third annular step is provided with an inner annular fire cover which is arranged above the inner annular groove.

[0012] Preferably, an ignition needle mounting seat and a thermocouple mounting seat are provided on the base, and a first mounting tube cooperating with the ignition needle mounting seat and a second mounting tube cooperating with the thermocouple mounting seat are provided on the bracket.

[0013] Preferably, the ignition needle mounting seat is provided with a first plug-in portion that is plug-matched with the first mounting cylinder, and the thermocouple mounting seat is provided with a second plug-in portion that is plug-matched with the second mounting cylinder.

[0014] Preferably, a mounting bracket is provided on the base, and a connecting hole is provided on the mounting bracket.

[0015] Preferably, the second channel extends in a straight line from the second air port to the second air inlet nozzle, the first outer air inlet nozzle and the second outer air inlet nozzle are located at the diagonals of the bracket, the first channel is arranged in an "L" shape, and the first outer air inlet nozzle and the second outer air inlet nozzle are respectively located at both ends of the first channel.

[0016] Preferably, the third air inlet nozzle is arranged on a side close to the third air port.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The utility model provides a partitioned and independently controlled upper air inlet burner, which is connected to the outer annular groove through the first air port, the middle annular groove through the second air port, and the inner annular groove through the third air port, and the first air port, the second air port and the third air port are respectively connected to the external air source, so that the fire of the inner annular groove, the middle annular groove and the outer annular groove can be controlled separately, and the three air ports, the first air port, the second air port and the third air port, can be combined and ventilated with each other to achieve adjustment of the fire output according to different needs of users, and the utility model has a total of seven adjustable fire output modes to meet the needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the bracket of the utility model from the first perspective;

[0021] Figure 3 This is a schematic diagram of the top view of the structure of the bracket of the utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the bracket of the utility model from a second perspective;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the base from the first perspective of the present invention;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the base from a second perspective of the present invention;

[0025] Figure 7 This is a schematic cross-sectional view of the airflow adjustment assembly of the present invention;

[0026] Figure 8 This is a side structural diagram of the airflow adjustment assembly of the present invention;

[0027] Figure 9 for Figure 7 Schematic diagram of the enlarged structure of A in the figure.

[0028] Description of the drawings: 1. Base; 10. Connecting hole; 101. First air port; 102. Second air port; 103. Third air port; 11. Mounting bracket; 12. First outer air inlet nozzle; 13. Second air inlet nozzle; 14. Third air inlet nozzle; 15. Second outer air inlet nozzle; 16. Ignition needle mounting seat; 161. First plug-in portion; 17. Thermocouple mounting seat; 171. Second plug-in portion; 181. First channel; 182. Second channel; 183. Third channel; 2. Bracket; 201. Ventilation hole; 202. Through hole; 211. First annular step; 212. Second annular step; 213. Third annular step shaped step; 21, outer annular groove; 22, outer ventilation annular groove; 23, middle annular groove; 24, inner ventilation annular groove; 25, inner annular groove; 26, outer ejector tube; 261, first outer ejector tube; 262, second outer ejector tube; 27, middle ejector tube; 28, inner ejector tube; 291, first mounting tube; 292, second mounting tube; 31, outer annular fire cover; 32, middle annular fire cover; 33, inner annular fire cover; 401, adjustment hole; 402, mounting hole; 41, connecting seat; 42, adjustment shaft; 421, clamping shaft; 43, matching block; 44, baffle; 45, spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figures 1-6 As shown, a partitioned and independently controlled upper air inlet burner includes a base 1 and a bracket 2, the bracket 2 is fixedly connected to the base 1, and an outer annular groove 21, an intermediate annular groove 23 and an inner annular groove 25 are sequentially arranged on the bracket 2 from the outer edge to the center. The base 1 is provided with a first air inlet nozzle, a second air inlet nozzle 13 and a third air inlet nozzle 14, and the bracket 2 is provided with an outer ejector pipe 26, an intermediate ejector pipe 27 and an inner ejector pipe 28. The first air inlet nozzle corresponds to the outer annular groove 21 and the outer ejector pipe 26, and the second The air inlet nozzle 13 corresponds to the middle annular groove 23 and the middle ejection tube 27, and the third air inlet nozzle 14 corresponds to the inner annular groove 25 and the inner ejection tube 28. The bracket 2 is provided with a first air port 101, a second air port 102 and a third air port 103 respectively connected to the external air source. The first air port 101 is connected to the first air inlet nozzle through the first channel 181, the second air port 102 is connected to the second air inlet nozzle 13 through the second channel 182, and the third air port 103 is connected to the third air inlet nozzle 14 through the third channel 183.

[0031] The first air inlet nozzle includes a first outer air inlet nozzle 12 and a second outer air inlet nozzle 15, and the outer layer ejector tube 26 includes a first outer layer ejector tube 261 and a second outer layer ejector tube 262 which are respectively connected to the outer annular groove 21. The first outer layer air inlet nozzle 12 corresponds to the first outer layer ejector tube 261, and the second outer layer air inlet nozzle 15 corresponds to the second outer layer ejector tube 262. The outlet end of the first outer layer ejector tube 261 and the outlet end of the second outer layer ejector tube 262 extend in the same clockwise direction in the outer annular groove 21.

[0032] Mixing chambers are formed between the first outer air inlet nozzle 12 and the first outer ejector tube 261, between the second air inlet nozzle 13 and the middle ejector tube 27, between the third air inlet nozzle 14 and the inner ejector tube 28, and between the second outer air inlet nozzle 15 and the second outer ejector tube 262. The gas nozzle blows gas into the ejector tube so that the gas can mix with the air and enter the ejector tube, thereby enabling the gas and oxygen in the air to burn.

[0033] The first outer layer air inlet nozzle 12 and the second outer layer air inlet nozzle 15 are communicated with each other through a first channel 181 .

[0034] When it is necessary to control the fire of the outer annular groove 21, it is only necessary to pass gas to the first gas port 101, and the gas is transmitted to the first outer gas inlet nozzle 12 and the second outer gas inlet nozzle 15 through the first channel 181, so that the first outer gas inlet nozzle 12 and the second outer gas inlet nozzle 15 can be ventilated to the first outer ejector tube 261 and the second outer ejector tube 262 respectively, so that the gas can enter the outer annular groove 21, thereby realizing the function of individually controlling the fire of the outer annular groove 21.

[0035] When it is necessary to control the ignition of the middle annular groove 23, it is only necessary to pass gas to the second gas port 102, and the gas is transmitted to the second gas inlet nozzle 13 through the second channel 182, and then the second gas inlet nozzle 13 can pass gas to the middle ejector pipe 27, so that the gas can enter the middle annular groove 23, thereby realizing the function of individually controlling the ignition of the middle annular groove 23.

[0036] When it is necessary to control the ignition of the inner annular groove 25, it is only necessary to pass gas to the third gas port 103, and the gas is transmitted to the third gas inlet nozzle 14 through the third channel 183, and then the third gas inlet nozzle 14 can pass gas to the inner ejector tube 28, so that the gas can enter the inner annular groove 25, thereby realizing the function of individually controlling the ignition of the inner annular groove 25.

[0037] In addition to individually controlling the outer annular groove 21, the middle annular groove 23 and the inner annular groove 25, it is also possible to adjust flames of different sizes by supplying gas to the first gas port 101, the second gas port 102 and the third gas port 103 in any combination, such as opening the first gas port 101 and the second gas port 102 at the same time, opening the first gas port 101 and the third gas port 103 at the same time, opening the second gas port 102 and the third gas port 103 at the same time, or opening the first gas port 101, the second gas port 102 and the third gas port 103 at the same time. The above four fire modes are supplemented by the three fire modes of individually opening the first gas port 101, the second gas port 102 and the third gas port 103. The present invention has a total of seven fire output modes to choose from, and the size of the fire output can be adjusted in multiple modes according to user needs.

[0038] The bracket 2 is provided with an inner ventilation annular groove 24 located between the middle annular groove 23 and the inner annular groove 25. The bracket 2 is also provided with a through hole 202 running through the bottom of the bracket 2. The through hole 202 connects the inner ventilation annular groove 24 with the outside air. Secondary air is introduced into the inner ventilation annular groove 24 through the through hole 202, so that the gas in the inner annular groove 25 burns more fully.

[0039] The bracket 2 is also provided with an outer ventilation annular groove 22 located between the outer annular groove 21 and the middle annular groove 23. The outer edge of the bracket 2 is provided with an air vent 201 that passes through the outer ventilation annular groove 22. The air vent 201 connects the outer ventilation annular groove 22 with the outside air, and secondary air is introduced into the outer ventilation annular groove 22 through the air vent 201, so that the gas in the middle annular groove 23 burns more fully.

[0040] The bracket 2 is provided with a first annular step 211, a second annular step 212 and a third annular step 213. The first annular step 211 is provided with an outer annular fire cover 31 covering the outer annular groove 21. The second annular step 212 is provided with an intermediate annular fire cover 32 covering the intermediate annular groove 23. The third annular step 213 is provided with an inner annular fire cover 33 covering the inner annular groove 25. The outer annular fire cover 31, the intermediate annular fire cover 32 and the inner annular fire cover 33 are all provided with a plurality of fire holes.

[0041] The base 1 is provided with an ignition needle mount 16 and a thermocouple mount 17. The bracket 2 is provided with a first mounting tube 291 that cooperates with the ignition needle mount 16 and a second mounting tube 292 that cooperates with the thermocouple mount 17. The ignition needle is used to ignite the gas, and the thermocouple can quickly cut off the gas if the flame is accidentally extinguished to prevent gas leakage. The ignition needle mount 16 and the thermocouple mount 17 are both circular in cross-section, and the first mounting tube 291 and the second mounting tube 292 are correspondingly circular. Both the first mounting tube 291 and the second mounting tube 292 are located within the inner ventilation annular groove 24, so that the ignition needle mount 16 and the thermocouple mount 17 can play a positioning and fixing role when the bracket 2 and the base 1 are installed.

[0042] The ignition needle mounting seat is provided with a first plug-in portion 161 that is plugged into and matched with the first mounting tube 291, and the thermocouple mounting seat 17 is provided with a second plug-in portion 171 that is plugged into and matched with the second mounting tube 292. The positioning and fixing function between the bracket 2 and the base 1 is achieved by plugging and matching the first plug-in portion 161 with the first mounting tube 291 and the second plug-in portion 171 with the second mounting tube 292.

[0043] The base 1 is provided with a mounting bracket 11 , and the mounting bracket 11 is provided with a connecting hole 10 , and the connecting hole 10 is used for installing bolts, so that the base 1 is installed on the gas stove.

[0044] The upper ends of the first outer air inlet nozzle 12 , the second air inlet nozzle 13 , the third air inlet nozzle 14 and the second outer air inlet nozzle 15 abut against the bottom of the bracket 2 , thereby making the bracket 2 more stable during use and preventing the bracket 2 from tipping over.

[0045] The second channel 182 extends in a straight line from the second gas port 102 to the second gas inlet nozzle 13. The second channel 182 is a straight line, which can reduce the loss of gas flow rate, thereby reducing the loss of gas flow rate. The first outer gas inlet nozzle 12 and the second outer gas inlet nozzle 15 are located at the diagonal points of the bracket 2. The first channel 181 is set in an "L" shape, and the first outer gas inlet nozzle 12 and the second outer gas inlet nozzle 15 are respectively located at the two end portions of the first channel 181, and the first channel 181 and the second channel 182 do not intersect each other. In addition, since the distance between the first outer gas inlet nozzle 12 and the second outer gas inlet nozzle 15 is relatively far, and in order to prevent the first channel 181 and the second channel 182 from intersecting each other, the first channel 181 is set in an "L" shape in this embodiment, and the third gas inlet nozzle 14 is set on the side close to the third gas port 103, thereby shortening the distance from the third gas port 103 to the third gas inlet nozzle 14, thereby reducing the loss of gas flow rate.

[0046] Reference Attachment Figure 7-Figure 9 , the present application is further improved, and the first air port 101, the second air port 102, and the third air port 103 are respectively provided with an air flow adjustment component, and the air flow adjustment component includes a connecting seat 41, an adjustment shaft 42 and a baffle 44. In this embodiment, the connecting seat 41 of the air flow adjustment component of the first air port 101 is connected to the first air port 101, and accordingly, the connecting seat 41 of the air flow adjustment component of the second air port 102 is connected to the second air port 102, and the connecting seat 41 of the air flow adjustment component of the third air port 103 is connected to the third air port 103.

[0047] The connecting seat 41 is provided with a mounting hole 402 and an adjustment hole 401, the adjusting shaft 42 is slidably arranged in the mounting hole 402, the adjusting shaft 42 has a connecting end and an adjusting end, the connecting end is rotatably matched with the baffle 44, the adjusting shaft 42 rotates along its own circumferential direction, the baffle 44 is slidably installed in the connecting seat 41, the baffle 44 slides axially along the adjusting shaft 42, and the baffle 44 moves in the adjusting hole 401 to adjust the size of the adjusting hole 401, and the adjusting shaft 42 can slide along the radial direction of the adjusting hole 401 while being able to rotate around the axial direction of the mounting hole 402. There are several clamping shafts 421, and a matching block 43 is provided on the connecting seat 41. A clamping slot is provided on the matching block 43. The clamping slot is arranged in cooperation with the clamping shaft 421. The clamping slot is cooperated with different clamping shafts 421 to adjust the position of the baffle 44 in the adjusting hole 401. When the clamping shaft 421 closest to the connecting seat 41 is cooperated with the clamping slot, the adjusting hole 401 is in a fully open state, that is, the baffle 44 does not block the adjusting hole 401. When the clamping shaft 421 farthest from the connecting seat 41 is cooperated with the clamping slot, the adjusting hole 401 is in a half-open state, that is, half of the adjusting hole 401 is blocked by the baffle 44, so the air flow is halved.

[0048] A spring 45 for resetting the baffle 44 is provided between the baffle 44 and the connecting seat 41 . The spring 45 always tends to pull the baffle 44 to move away from the axis of the adjustment hole 401 .

[0049] It should be noted that the baffle 44 described in this application is a semicircular baffle 44. In addition to the semicircular shape, it can also be a circle or any other shape. In addition, the area of ​​the baffle 44 is moderately smaller than the area of ​​the adjustment hole 401, and the second air port 102 and the third air port 103 can also be installed with airflow adjustment components.

[0050] During specific adjustment, first rotate the adjusting shaft 42 to disengage the coupling shaft 421 on the adjusting shaft 42 from the coupling connection with the coupling slot, and then manually move the adjusting shaft 42 along the axial direction of the mounting hole 402. By matching different coupling shafts 421 with the coupling slot, the position of the baffle 44 is adjusted, thereby adjusting the size of the adjusting hole 401, and then adjusting the air flow of the adjusting hole 401, so as to meet the needs of different customers.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A partitioned and independently controlled upper air inlet burner, comprising a base (1) and a bracket (2), wherein the bracket (2) is arranged on the base (1), and an outer annular groove (21), an intermediate annular groove (23) and an inner annular groove (25) are sequentially arranged on the bracket (2) from the outer edge to the center, a first air inlet nozzle, a second air inlet nozzle (13) and a third air inlet nozzle (14) are provided on the base (1), an outer ejector tube (26) communicating with the outer annular groove (21), an intermediate ejector tube (27) communicating with the intermediate annular groove (23) and an inner ejector tube (28) communicating with the inner annular groove (25) are respectively provided on the bracket (2), the first air inlet nozzle is matched with the outer ejector tube (26), the second air inlet nozzle (13) is matched with the intermediate ejector tube (27), and the third air inlet nozzle (14) is matched with the inner ejector tube (28), characterized in that: The bracket (2) is provided with a first air port (101), a second air port (102) and a third air port (103) respectively connected to an air source, the first air port (101) being connected to the first air inlet nozzle via a first channel (181), the second air port (102) being connected to the second air inlet nozzle (13) via a second channel (182), and the third air port (103) being connected to the third air inlet nozzle (14) via a third channel (183).

2. The independently controllable upper air inlet burner according to claim 1, characterized in that: The first air inlet nozzle comprises a first outer air inlet nozzle (12) and a second outer air inlet nozzle (15); the outer ejector tube (26) comprises a first outer ejector tube (261) and a second outer ejector tube (262) respectively connected to the outer annular groove (21); the first outer air inlet nozzle (12) corresponds to the first outer ejector tube (261); the second outer air inlet nozzle (15) corresponds to the second outer ejector tube (262); the air outlet end of the first outer ejector tube (261) and the air outlet end of the second outer ejector tube (262) extend in the same clockwise direction in the outer annular groove (21).

3. The independently controllable upper air inlet burner according to claim 1, characterized in that: The bracket (2) is provided with an inner ventilation annular groove (24) located between the middle annular groove (23) and the inner annular groove (25), and the bracket (2) is further provided with a through hole (202) penetrating the bottom of the bracket (2), and the through hole (202) connects the inner ventilation annular groove (24) with the outside air.

4. The independently controllable upper air inlet burner according to claim 1, characterized in that: The bracket (2) is further provided with an outer ventilation annular groove (22) located between the outer annular groove (21) and the middle annular groove (23); an air vent (201) penetrating the outer ventilation annular groove (22) is provided on the outer edge of the bracket (2); the air vent (201) connects the outer ventilation annular groove (22) with the outside air.

5. The independently controllable upper air inlet burner according to claim 1, characterized in that: The bracket (2) is provided with a first annular step (211), a second annular step (212) and a third annular step (213); the first annular step (211) is provided with an outer annular fire cover (31) covering the outer annular groove (21); the second annular step (212) is provided with an intermediate annular fire cover (32) covering the intermediate annular groove (23); and the third annular step (213) is provided with an inner annular fire cover (33) covering the inner annular groove (25).

6. The independently controllable upper air inlet burner according to claim 1, characterized in that: An ignition needle mounting seat (16) and a thermocouple mounting seat (17) are provided on the base (1), and a first mounting tube (291) cooperating with the ignition needle mounting seat (16) and a second mounting tube (292) cooperating with the thermocouple mounting seat (17) are provided on the bracket (2).

7. The independently controllable upper air inlet burner according to claim 6, characterized in that: The ignition needle mounting seat is provided with a first plug-in portion (161) pluggable with the first mounting cylinder (291), and the thermocouple mounting seat (17) is provided with a second plug-in portion (171) pluggable with the second mounting cylinder (292).

8. The partitioned and independently controlled upper air inlet burner according to claim 1, characterized in that: A mounting bracket (11) is provided on the base (1), and a connecting hole (10) is provided on the mounting bracket (11).

9. The independently controllable upper air inlet burner according to claim 2, characterized in that: The second channel (182) extends in a straight line from the second air port (102) to the second air inlet nozzle (13), the first outer layer air inlet nozzle (12) and the second outer layer air inlet nozzle (15) are located at diagonal positions of the bracket (2), the first channel (181) is arranged in an "L" shape, and the first outer layer air inlet nozzle (12) and the second outer layer air inlet nozzle (15) are respectively located at two ends of the first channel (181).

10. The partitioned and independently controlled upper air inlet burner according to claim 1, characterized in that: The third air inlet nozzle (14) is arranged on a side close to the third air port (103).

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