Upper air inlet burner

Abstract

The utility model discloses an upper air inlet burner, which comprises a base assembly, a gas inlet assembly and a gas outlet assembly, the base assembly is provided with a circular support table and a gas outlet seat, the gas outlet seat is arranged outside the support table and fixedly connected with the support table, and the gas outlet seat comprises an outer ring gas outlet seat and an inner ring gas outlet seat which are parallel and arranged in the same direction; the fire distributor is installed at the top of the supporting table, the orthographic projection of the fire distributor covers the supporting table and the air outlet base, and an outer injection pipe and an inner injection pipe which are parallel and arranged in the same direction are arranged at the bottom of the fire distributor. According to the upper air inlet burner, the size of the base assembly is reduced, and meanwhile the problem that the upper air inlet burner is not easy to clean is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to an upper air inlet burner. Background Art

[0002] In order to solve the problem of nozzles being easily clogged, most of the upper air inlet burners currently on the market adopt an external ejector, with the corresponding nozzle seat exposed on the stove panel and the nozzle arranged horizontally. In order to solve the problems of short ejectors, low ejection coefficients, and poor combustion conditions of upper air inlet burners, a multi-ejector design is usually adopted, with more than three inner and outer ring ejectors and more than three corresponding exposed nozzle seats. However, the nozzle seats are exposed too much on the stove panel, and the nozzle seats are arranged relatively to each other, so users are prone to cleaning dead corners when cleaning the stove panel, which is not conducive to cleaning the stove panel. Summary of the invention

[0003] The utility model aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the utility model proposes an upper air inlet burner, which is conducive to reducing the volume of the base component and solving the problem that the upper air inlet burner is difficult to clean.

[0004] According to the above-mentioned upward air inlet burner, it is realized by the following technical solution:

[0005] A top air inlet burner comprises: a base assembly having a circular support platform and an air outlet seat, the air outlet seat being arranged outside the support platform and fixedly connected to the support platform, the air outlet seat comprising an outer ring air outlet seat and an inner ring air outlet seat arranged in parallel and in the same direction; and a flame divider, which is installed on the top of the support platform and whose orthographic projection covers the support platform and the air outlet seat respectively, and an outer ejection tube and an inner ejection tube arranged in parallel and in the same direction are provided at the bottom of the flame divider.

[0006] In some embodiments, the ignition divider has an upwardly opening air cavity, and a downwardly extending annular retaining ring is integrally formed at the bottom of the air cavity, the bottom surface of the annular retaining ring abuts and fits against the top surface of the support platform, and the ignition divider has a channel connected to the air cavity and located radially outside the annular retaining ring; part or all of the inner ejection tube and the outer ejection tube are arranged in the annular retaining ring.

[0007] In some embodiments, the diameter of the support platform is greater than or equal to the outer diameter of the annular retaining ring and smaller than the maximum outer diameter of the spark divider.

[0008] In some embodiments, a plurality of circumferentially spaced notches are provided at the lower end of the annular retaining ring; and / or the bottom surface of the air cavity is in the shape of a truncated cone with a larger lower end and a smaller upper end, and the channel is provided on the outer cavity wall or the lower end of the cavity bottom surface of the air cavity.

[0009] In some embodiments, an outwardly extending annular step is integrally formed at the lower end of the peripheral wall of the support platform, and a plurality of installation positions spaced circumferentially are provided on the annular step, and the orthographic projection of the ignition divider covers the annular step and all the installation positions.

[0010] In some embodiments, the outer ring air outlet seat and the inner ring air outlet seat are staggered and the distance between them is greater than 35 mm; the distance between the outer ejector tube and the central axis of the ignition divider is 25 to 35 mm, and the distance between the inner ejector tube and the central axis of the ignition divider is 5 to 15 mm.

[0011] In some embodiments, one end of the support platform close to the air outlet seat is integrally formed with two bosses extending outward and arranged side by side at intervals, and the two bosses are respectively integrally formed with the outer ring air outlet seat and the inner ring air outlet seat.

[0012] In some embodiments, the outer ring air outlet seat is a vertically arranged outer ring air duct, which has a vertically arranged outer ring air channel, and the inner ring air outlet seat is a vertically arranged inner ring air duct, which has a vertically arranged inner ring air channel; and / or a positioning structure is provided between the ignition divider and the outer ring air outlet seat and / or the inner ring air outlet seat.

[0013] In some embodiments, the lower ends of the outer ring air duct and the inner ring air duct both extend downward to the bottom of the support platform; a plurality of support feet extending downward and a connecting arm are integrally formed at the bottom of the support platform, and the opposite ends of the connecting arm are respectively integrally formed with the lower end of the outer ring air duct and the lower end of the inner ring air duct.

[0014] In some embodiments, an ignition assembly is also included, wherein an assembly hole is provided at one end of the support platform away from the air outlet seat, and an assembly hole is provided at a position of the ignition distributor corresponding to the assembly hole, and the upper and lower ends of the ignition assembly are vertically penetrated through the installation hole and the assembly hole respectively.

[0015] In some embodiments, the ignition assembly is provided with a support that rests against the top of the support platform, and a clamping portion extending toward the support is integrally formed at the bottom of the ignition distributor, and the clamping portion presses the support tightly against the top surface of the support platform.

[0016] In some embodiments, a slope or arc surface that is inclined or curved from bottom to top is formed at a position near the support at the bottom of the annular retaining ring, and the portion of the slope or arc surface that is pressed tightly against the support constitutes a pressing portion.

[0017] In some embodiments, a downward extending and downward opening slot is integrally formed at the bottom of the fire divider at a position corresponding to the support, and the slot is configured to be placed outside the support and press the support against the top surface of the support platform, and the pressing portion is composed of the slot.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The upper air inlet burner of the utility model is designed to have a circular support platform of the base assembly, and only an inner ring air outlet seat and an outer ring air outlet seat are arranged in parallel and in the same direction on the outer side of the support platform. The structure is simple, which is conducive to reducing the volume of the base assembly, reducing the air outlet seat exposed on the cooker panel, reducing cleaning dead corners, and making cleaning more convenient;

[0020] 2. By setting a downwardly extending annular retaining ring at the bottom of the ignition distributor, the annular retaining ring contacts the top surface of the support platform of the base assembly, so that the ignition distributor remains horizontal after installation, preventing the ignition distributor from shaking due to pressing, and at the same time positioning the ejector of the ignition distributor, ensuring the concentricity of the ejector of the ignition distributor and the nozzle of the base assembly;

[0021] 3. A channel connected to the air cavity and located radially outside the annular retaining ring is provided on the ignition distributor to facilitate the replenishment of secondary air while allowing the overflow in the air cavity to be discharged from the channel and flow into the liquid receiving tray along the annular retaining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded view of an upper air inlet burner in an embodiment of the utility model;

[0023] Figure 2 This is a cross-sectional view of the upper air inlet burner in the embodiment of the utility model. Figure 1 ;

[0024] Figure 3 This is a cross-sectional view of the upper air inlet burner in the embodiment of the utility model. Figure 2 ;

[0025] Figure 4 It is a structural schematic diagram of the base assembly in the embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the base body in the embodiment of the utility model;

[0027] Figure 6 It is a cross-sectional view of the base assembly in the embodiment of the utility model Figure 1 ;

[0028] Figure 7 It is a cross-sectional view of the base assembly in the embodiment of the utility model Figure 2 ;

[0029] Figure 8 This is a schematic diagram of the structure of the fire distributor in the embodiment of the utility model. Figure 1 ;

[0030] Fig. 9 This is a schematic diagram of the structure of the fire distributor in the embodiment of the utility model. Figure 2 ;

[0031] Fig.10 It is a cross-sectional view of the fire distributor in the embodiment of the utility model.

[0032] In the figure: 1-base assembly, 101-base body, 102-outer ring nozzle, 103-inner ring nozzle, 104-air inlet connector, 11-support platform, 121-outer ring air outlet seat, 1211-outer ring air duct, 122-inner ring air outlet seat, 1221-inner ring air guide pipe, 13-annular step, 131-installation position, 14-boss, 15-positioning column, 16-support foot, 17-connecting arm, 171-support part, 18-assembly hole;

[0033] 2-fire distributor, 211-outer ejector tube, 212-inner ejector tube, 221-air cavity, 222-outer ring air cavity, 223-inner ring air cavity, 2231-center protrusion, 2232-upper fixing hole, 2233-lower groove, 2234-stopper, 2235-positioning portion, 23-annular retaining ring, 2301-first arc segment, 2302-second arc segment, 2303-third arc segment, 231-notch, 24-channel, 25-positioning groove, 26-mounting hole, 27-pressing portion;

[0034] 3-ignition assembly, 31-support; 4-fire cover assembly. DETAILED DESCRIPTION

[0035] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific implementation of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed for protection in the present invention.

[0036] refer to Figure 1-10 The present embodiment provides an upper air inlet burner, including a base assembly 1 and a ignition distributor. The base assembly 1 includes a base body 101, the base body 101 has a support platform 11 and an air outlet seat (not shown in the figure), the support platform 11 is circular, the air outlet seat is arranged outside the support platform 11 and is integrally formed with the support platform 11, and the air outlet seat includes an outer ring air outlet seat 121 and an inner ring air outlet seat 122 arranged in parallel and in the same direction, so that the structure of the base body 101 is simpler, which is conducive to reducing the volume of the base body 101. At the same time, only an outer ring air outlet seat 121 and an inner ring air outlet seat 122 are exposed on the stove panel, reducing the exposure of the air seat and the cleaning dead corner, making cleaning more convenient; in addition, by arranging the air outlet seat outside the support platform 11 and fixedly connected to the support platform 11, the positive projection of the outer ring air cavity 222 of the ignition distributor 2 can cover the air outlet seat and the nozzle installed on the air outlet seat, thereby preventing the overflow after the pot overflows from falling and blocking the aperture of the nozzle.

[0037] The nozzle includes an outer ring nozzle 102 and an inner ring nozzle 103. The outer ring nozzle 102 is horizontally or obliquely installed at the upper end of the outer ring air outlet seat 121, and the air outlet direction of the outer ring nozzle 102 is toward the upper end of the support platform 11. The inner ring nozzle 103 is horizontally or obliquely installed at the upper end of the inner ring air outlet seat 122, and the air outlet direction of the inner ring nozzle 103 is toward the upper end of the support platform 11. In this embodiment, the outer ring air outlet seat 121 and the inner ring air outlet seat 122 are staggered, and the distance between the two is greater than 35mm, which is conducive to cleaning, so that the air flow flowing when the nozzle injects air once will not interfere with each other due to the close distance. In addition, the base assembly 1 also includes two air inlet connectors 104, which are respectively installed at the lower ends of the outer ring air outlet seat 121 and the inner ring air outlet seat 122.

[0038] The fire distributor 2 is installed on the top of the support platform 11, and its orthographic projection covers the support platform 11, the gas outlet seat and the nozzle installed on the gas outlet seat, so that the support platform 11, the gas outlet seat and the nozzle are hidden at the bottom of the fire distributor 2 to prevent the overflow from falling and blocking the aperture of the nozzle. The outer ejector tube 211 and the inner ejector tube 212 arranged in parallel and in the same direction are integrally formed at the bottom of the fire distributor 2. The inlet of the outer ejector tube 211 is connected to the upper end of the outer ring gas outlet seat 121 through the outer ring nozzle 102, and the upper end of the inner ejector tube 212 is connected to the upper end of the inner ring gas outlet seat 122 through the inner ring nozzle 103. In this embodiment, the outer ejector tube 211 and the inner ejector tube 212 are respectively located at the opposite outer sides of the central axis of the fire distributor 2, and the distance between the outer ejector tube 211 and the central axis of the fire distributor 2 is 25-35 mm, and the distance between the inner ejector tube 212 and the central axis of the fire distributor 2 is 5-15 mm.

[0039] refer to Figure 1-3 and Figure 8-10The igniter 2 has an air cavity 221, an outer ring cavity 222 and an inner ring cavity 223 which are coaxially arranged and open upwards, the air cavity 221 is located between the inner ring cavity 223 and the outer ring cavity 222, the outer ring cavity 222 is connected to the outlet of the outer ejection tube 211, and the inner ring cavity 223 is connected to the outlet of the inner ejection tube 212. In this embodiment, the orthographic projections of the air cavity 221 and the inner ring cavity 223 cover the entire support platform 11, while the outer ring cavity 222 covers the entire nozzle and the entire or most of the gas outlet seat. Furthermore, a central protrusion 2231 extending upward is formed integrally on the bottom surface of the inner ring air cavity 223, an upper fixing hole 2232 opening upward is provided at the upper end of the central protrusion 2231, and is used to fix the gas distribution plate installed on the top of the central protrusion 2231, and a lower groove 2233 opening downward is provided at the lower end of the central protrusion 2231, so as to save materials and demould, thereby reducing costs. A stopper 2234 located between the central protrusion 2231 and the cavity wall surface of the inner ring air cavity 223 is formed integrally in the inner ring air cavity 223, and the stopper 2234 is arranged close to the outlet of the inner ejector tube 212, and is used to make the inner ring gas flowing out of the inner ejector tube 212 flow to the space between the central protrusion 2231 and the cavity wall surface of the inner ring air cavity 223 in the same direction (for example, counterclockwise), thereby reducing the diversion of the inner ring gas. A positioning portion 2235 arranged vertically and close to the outlet of the inner ejector tube 212 is provided on the top of the stopper 2234 . The positioning portion 2235 is used to pre-position the gas distributor plate of the burner to prevent the gas distributor plate from rotating and shifting relative to the central protrusion 2231 .

[0040] refer to Figure 1-5 A downwardly extending annular retaining ring 23 is integrally formed at the bottom of the air cavity 221, and the annular retaining ring 23 is in contact with the top surface of the support platform 11. In the present embodiment, the top surface of the support platform 11 is a horizontal plane, which forms a surface contact with the bottom surface of the annular retaining ring 23, thereby increasing the contact area and allowing the ignition divider 2 to remain horizontal after installation, thereby improving the stability and reliability of the installation of the ignition divider 2, and preventing the ignition divider 2 from shaking due to pressing. At the same time, it can position the ejector of the ignition divider 2, thereby ensuring the concentricity of the ejector of the ignition divider 2 and the nozzle of the base assembly 1.

[0041] A channel 24 is provided on the ignition distributor 2, which is connected to the air cavity 221 and is located radially outside the annular retaining ring 23. This makes it convenient to replenish secondary air for the air cavity 221 through the channel 24, while allowing the overflow liquid in the air cavity 221 to be discharged from the channel 24 and flow into the liquid storage pan of the burner along the annular retaining ring 23. In the present embodiment, the bottom surface of the air cavity 221 is in the shape of a truncated cone with a larger lower end and a smaller upper end, and includes an inclined section and a plane section. The plane section is integrally formed and arranged between the peripheral wall of the inner ring air cavity 223 and the upper end of the inclined section. A downwardly extending annular retaining ring 23 is formed on the lower peripheral edge of the inclined section of the air cavity 221, and a channel 24 is arranged on the outer cavity wall of the air cavity 221. In this way, the secondary air flows upward along the inclined section of the ignition divider, which is beneficial to lowering the height of the burner. At the same time, the secondary air flows upward along the inclined section due to the thermal effect, which is also beneficial to the flow of the secondary air and reduces the flow resistance. After the overflow falls to the bottom surface of the air cavity 221, it flows along the inclined section and the annular retaining ring 23 to the liquid receiving tray in turn. In other embodiments, the annular retaining ring 23 can be integrally formed and arranged at the lower end of the inclined section of the air cavity 221. In this case, the channel 24 can be arranged at the lower end of the inclined section of the air cavity 221 and located radially outside the annular retaining ring 23. In this way, the diameter of the annular retaining ring 23 can be further reduced, and correspondingly, the volume of the support platform 11 can also be further reduced.

[0042] Furthermore, the diameter of the support platform 11 is greater than or equal to the outer diameter of the annular retaining ring 23 and is smaller than the maximum outer diameter of the fire divider 2. In this embodiment, the outer diameter of the annular retaining ring 23 is the same as the diameter of the support platform 11, so that the support platform 11 can stably and reliably support the annular retaining ring 23 while reducing the volume of the base body 101, so that the support platform 11 is completely covered by the positive projection of the fire divider 2, and the support platform 11 is completely hidden at the bottom of the fire divider 2. A plurality of notches 231 arranged at intervals in the circumferential direction are provided at the lower end of the annular retaining ring 23 to allow air and overflow to pass through while saving materials.

[0043] refer to Fig.10, part or all of the inner ejection tube 212 and the outer ejection tube 211 are arranged in the annular retaining ring 23. In this embodiment, the annular retaining ring 23 includes a first arc segment 2301, a second arc segment 2302 and a third arc segment 2303 arranged at intervals in the circumferential direction. The first arc segment 2301 is arranged at the radial outer side of the inner ejection tube 212, and one end thereof is integrally formed with the air inlet end of the inner ejection tube 212, and the other end is integrally formed with the air outlet end of the outer ejection tube 211. The air outlet end of the inner ejection tube 212 is arranged at intervals with the first arc segment 2301, so that the first arc segment 2301 can cover most of the inner ejection tube 212. The second arc segment 2302 is arranged at the radial outer side of the outer ejection tube 211, and its opposite ends are respectively integrally formed with the air inlet end and the air outlet end of the outer ejection tube 211, so as to cover the middle section of the outer ejection tube 211. The third arc segment 2303 is integrally formed and arranged between the entrance of the inner ejector tube and the entrance of the outer ejector tube. Notches 231 are respectively provided at the lower ends of the first arc segment 2301 and the second arc segment 2302, and channels 24 are provided on the radial outer sides of the first arc segment 2301, the second arc segment 2302 and the third arc segment 2303 to increase the secondary air replenishment area and solve the problem that the CO content in the flue gas of the upper air intake burner is easily exceeded. Of course, the channel 24 in the third arc segment 2303 can also be omitted to prevent the overflow from flowing along the channel 24 near the nozzle and clogging the nozzle.

[0044] refer to Figure 4-7 An annular step 13 extending outward is integrally formed at the lower end of the peripheral wall of the support platform 11. In this embodiment, the annular step 13 is the installation surface of the stove panel. The top surface of the annular step 13 is 2 to 3 mm lower than the top surface of the support platform 11, and the width of the annular step 13 is 2 to 3 mm. A plurality of mounting positions 131 arranged at intervals in the circumferential direction are provided on the annular step 13. The mounting positions 131 can be connected to the stove panel by screws. The orthographic projection of the ignition distributor 2 covers the annular step 13 and all the mounting positions 131. In this way, the mounting positions 131 are closer to the center of the burner and will not be exposed outside the ignition distributor 2, thereby preventing the panel mounting screws from rusting due to being exposed outside the ignition distributor 2 without shielding.

[0045] In this embodiment, one end of the support platform 11 close to the gas outlet seat is integrally formed with two bosses 14 extending outward and arranged side by side at intervals, and the free ends of the two bosses 14 are respectively integrally formed with the outer ring gas outlet seat 121 and the inner ring gas outlet seat 122. In other embodiments, the two bosses 14 can be omitted.

[0046] refer to Figure 6The outer ring air outlet seat 121 is a vertically arranged outer ring air guide tube, which has a vertically arranged outer ring air passage 1211. An outer ring air inlet and an outer ring air outlet connected to the outer ring air passage 1211 are respectively provided at the upper and lower ends of the outer ring air guide tube. The outer ring air outlet is connected to the outer ejector tube 211 through the outer ring nozzle 102. Figure 7 The inner ring air outlet seat 122 is a vertically arranged inner ring air guide pipe 1221, and the inner ring air guide pipe 1221 has a vertically arranged inner ring air passage 1221. The inner ring air inlet and the inner ring air outlet connected to the inner ring air passage are respectively arranged at the upper and lower ends of the inner ring air guide pipe 1221, and the inner ring air outlet is connected to the inner ejection pipe 212 through the inner ring nozzle 103. It can be seen that both the inner and outer ring air guide pipes have no branch structure. When the gas with a certain pressure flows directly into the nozzle through the vertical air guide pipe without a branch structure, the resistance loss of the flow channel branch is reduced, and the speed and flow rate of the gas ejected from the nozzle 102 are increased, which is conducive to improving the performance of the gas ejection of the primary air, more complete combustion, and reducing the content of CO in the flue gas.

[0047] A positioning structure is provided between the igniter 2 and the inner ring air outlet seat 122 and / or the outer ring air outlet seat 121 to achieve positioning of the igniter 2 and prevent the eccentricity problem when the igniter 2 is installed on the base assembly 1. In this embodiment, the positioning structure includes a positioning column 15 and a positioning groove 25 that are matched and plugged in. The positioning column 15 is integrally formed and arranged on the top of the inner ring air outlet seat 122 and / or the outer ring air outlet seat 121, and the positioning groove 25 is recessed at the bottom of the igniter 2 at a position corresponding to the positioning column 15.

[0048] refer to Figure 4-7 , the lower ends of the outer ring air duct and the inner ring air duct 1221 both extend downward to the bottom of the support platform 11. A plurality of support legs 16 extending downward and a connecting arm 17 are integrally formed at the bottom of the support platform 11, and the opposite ends of the connecting arm 17 are integrally formed with the lower end of the outer ring air duct and the lower end of the inner ring air duct 1221, respectively. In this embodiment, a support portion 171 is integrally formed at the bottom or the lower end of the outer wall of the connecting arm 17, and the support portion 171 is located between the outer ring air duct and the inner ring air duct 1221. The bottom of each support leg 16 and the bottom of the support portion 171 of the connecting arm 17 are used to contact the bottom shell of the stove, so that the connecting arm 17 can serve as a support leg 16, and can also play a role in connecting and fixing the inner and outer air ducts and strengthening the strength of the base body 101.

[0049] refer to Figure 1-10The burner also includes an ignition assembly 3. An assembly hole 18 is provided at one end of the support platform 11 away from the air outlet seat. A mounting hole 26 is provided at a position of the igniter 2 corresponding to the assembly hole 18. The mounting hole 26 is provided on the cavity bottom surface of the air cavity 221 and is located radially inside the annular retaining ring 23. In this embodiment, the mounting hole 26 is provided radially inside the first arc segment 2301 of the annular retaining ring 23. The upper and lower ends of the ignition assembly 3 are vertically penetrated in the mounting hole 26 and the assembly hole 18, respectively. In this way, only the inner and outer air seats and an ignition assembly are exposed on the support platform 11 of the base assembly 1, ensuring the simplicity of the base body 101 and easy cleaning.

[0050] The ignition assembly 3 is provided with a support 31 resting against the top of the support platform 11, and a clamping portion 27 extending toward the support 31 is integrally formed at the bottom of the ignition distributor 2. In the present embodiment, an inclined surface or arcuate surface inclined or curved from bottom to top is formed at a position near the support 31 at the bottom of the annular retaining ring 23. Specifically, an inclined surface or arcuate surface inclined or curved from bottom to top is formed at one end of the bottom surface of the first arc segment 2301 near the gas outlet end of the external ejection tube 211. The portion of the inclined surface or arcuate surface constitutes the clamping portion 27, and the clamping portion 27 can press the support 31 against the top surface of the support platform 11, see Figure 3 In this way, the inclined surface or arc surface of the annular retaining ring 23 is fully utilized to press the support 31 of the ignition component 3 against the top surface of the support platform 11, thereby improving the reliability of the installation of the ignition component 3. In other embodiments, a downward extending and downwardly opening card slot can be integrally formed at the position of the cavity bottom surface of the air cavity 221 corresponding to the support 31, and the card slot is configured to be clamped outside the support 31 and press the support 31 against the top surface of the support platform 11. In this case, the pressing portion 27 is composed of the card slot.

[0051] refer to Figure 1-3 The burner further comprises a fire cover assembly 4, which is disposed on the top of the fire distributor 2 and covers the upward openings of the outer ring air cavity 222 and the inner ring air cavity 223 respectively.

[0052] 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 belong to the protection scope of the present invention.

Claims

1. An upward air inlet burner, characterized in that: include: A base assembly (1) comprising a circular support platform (11) and an air outlet seat, wherein the air outlet seat is arranged outside the support platform (11) and is fixedly connected to the support platform (11), and the air outlet seat comprises an outer ring air outlet seat (121) and an inner ring air outlet seat (122) arranged in parallel and in the same direction; and The fire distributor (2) is installed on the top of the support platform (11) and its orthographic projection covers the support platform (11) and the gas outlet seat respectively. An outer ejector tube (211) and an inner ejector tube (212) arranged in parallel and in the same direction are provided at the bottom of the fire distributor (2).

2. The upward air inlet burner according to claim 1, characterized in that: The ignition divider (2) has an upwardly opening air cavity (221), and a downwardly extending annular retaining ring (23) is integrally formed at the bottom of the air cavity (221), and the bottom surface of the annular retaining ring (23) abuts and fits against the top surface of the support platform (11). The ignition divider (2) is provided with a channel (24) which is connected to the air cavity (221) and is located radially outside the annular retaining ring (23); part or all of the inner ejection tube (212) and the outer ejection tube (211) are arranged in the annular retaining ring (23).

3. The upward air inlet burner according to claim 2, characterized in that: The diameter of the support platform (11) is greater than or equal to the outer diameter of the annular retaining ring (23), and is smaller than the maximum outer diameter of the ignition distributor (2).

4. The upward air inlet burner according to claim 2, characterized in that: A plurality of notches (231) arranged at intervals in the circumferential direction are provided at the lower end of the annular retaining ring (23); and / or the bottom surface of the air cavity (221) is in the shape of a truncated cone with a larger lower end and a smaller upper end, and the channel (24) is provided on the outer cavity wall surface or the lower end of the cavity bottom surface of the air cavity (221).

5. The upward air inlet burner according to claim 1, characterized in that: An outwardly extending annular step (13) is integrally formed at the lower end of the peripheral wall of the support platform (11), and a plurality of mounting positions (131) arranged at circumferential intervals are provided on the annular step (13), and the orthographic projection of the ignition distributor (2) covers the annular step (13) and all of the mounting positions (131).

6. The upward air inlet burner according to claim 1, characterized in that: The outer ring air outlet seat (121) and the inner ring air outlet seat (122) are arranged in a staggered manner, and the distance between the two is greater than 35 mm; the distance between the outer ejector tube (211) and the central axis of the ignition divider (2) is 25 to 35 mm, and the distance between the inner ejector tube (212) and the central axis of the ignition divider (2) is 5 to 15 mm.

7. The upward air inlet burner according to claim 1 or 6, characterized in that: One end of the support platform (11) close to the air outlet seat is integrally formed with two bosses (14) extending outward and arranged side by side at intervals, and the two bosses (14) are respectively integrally formed with the outer ring air outlet seat (121) and the inner ring air outlet seat (122).

8. The upward air inlet burner according to claim 1 or 6, characterized in that: The outer ring air outlet seat (121) is a vertically arranged outer ring air duct, and the outer ring air duct has a vertically arranged outer ring air channel (1211); the inner ring air outlet seat (122) is a vertically arranged inner ring air duct (1221), and the inner ring air duct (1221) has a vertically arranged inner ring air channel; and / or a positioning structure is provided between the ignition distributor (2) and the outer ring air outlet seat (121) and / or the inner ring air outlet seat (122).

9. The upward air inlet burner according to claim 8, characterized in that: The lower ends of the outer ring air guide tube and the inner ring air guide tube (1221) both extend downward to below the support platform (11); a plurality of support legs (16) extending downward and a connecting arm (17) are integrally formed at the bottom of the support platform (11), and the opposite ends of the connecting arm (17) are integrally formed with the lower end of the outer ring air guide tube and the lower end of the inner ring air guide tube (1221), respectively.

10. The upward air inlet burner according to claim 1, characterized in that: It also comprises an ignition assembly (3), wherein an assembly hole (18) is provided at one end of the support platform (11) away from the gas outlet seat, and the ignition distributor (2) is provided with a mounting hole (26) at a position corresponding to the mounting hole (18), and the upper and lower ends of the ignition assembly (3) are respectively vertically penetrated through the mounting hole (26) and the mounting hole (18).

11. The upward air inlet burner according to claim 10, characterized in that: The ignition assembly (3) is provided with a support (31) resting against the top of the support platform (11), and a clamping portion (27) extending toward the support (31) is integrally formed at the bottom of the ignition distributor (2), and the clamping portion (27) presses the support (31) against the top surface of the support platform (11).

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