A burner assembly and an air inlet burner therefor

Abstract

The application discloses a kind of fire divider assemblies and its upper air inlet burner, fire divider assembly includes fire divider, the air cavity of the fire divider has coaxial arrangement, outer ring gas cavity and inner ring gas cavity, the air cavity is located between the outer ring gas cavity and the inner ring gas cavity, outer ejector pipe and inner ejector pipe are arranged in parallel and in the same direction at the bottom of the fire divider, the outlet of the outer ejector pipe is communicated with the outer ring gas cavity, the outlet of the inner ejector pipe is communicated with the inner ring gas cavity, annular baffle ring is provided downwards at the bottom of the air cavity, channel is opened in the outer cavity wall surface or cavity bottom surface of the air cavity, which is located at the radial outer side of the annular baffle ring.The fire divider assembly of the application realizes the guidance of secondary air and overflow liquid at the same time, solves the problem of pressing shaking of fire divider assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burners, in particular to a burner assembly and an updraft burner thereof. BACKGROUND

[0002] In order to solve the problem of nozzle blockage, the existing updraft burners on the market mostly adopt an external ejector, and the corresponding nozzle seat is exposed on the stove panel, and the nozzle is horizontally arranged. In order to solve the problem of short ejector, low ejector coefficient and poor combustion of the updraft burner, a multi-ejector design is usually adopted, and the number of inner and outer ring ejectors reaches more than 3, and the corresponding exposed nozzle seat reaches more than 3. However, too many nozzle seats are exposed on the stove panel, and the nozzle seats are arranged relatively, so that there are cleaning dead angles when the user cleans the stove panel, which is not conducive to the cleaning of the stove panel.

[0003] In addition, the existing burner is generally installed on the top of the base assembly through the cooperation of the positioning column and the positioning groove, and the installation balance of the burner is poor, and the pressing shaking phenomenon may occur. SUMMARY

[0004] The present application aims to at least solve one of the problems existing in the prior art to some extent, and for this purpose, the present application provides a burner assembly, which can guide secondary air and overflow liquid at the same time and solve the problem of pressing shaking of the burner assembly.

[0005] According to the above-mentioned burner assembly, the following technical solutions are adopted:

[0006] A burner assembly includes a burner, the burner has coaxially arranged air cavity, outer ring air cavity and inner ring air cavity, the air cavity is located between the outer ring air cavity and the inner ring air cavity, and parallel and same direction arranged outer ejector pipe and inner ejector pipe are arranged at the bottom of the burner, the outlet of the outer ejector pipe is in communication with the outer ring air cavity, the outlet of the inner ejector pipe is in communication with the inner ring air cavity, a downward extending annular retaining ring is arranged at the bottom of the air cavity, and a channel located radially outside the annular retaining ring is arranged on the outer cavity wall surface or cavity bottom surface of the air cavity.

[0007] In some embodiments, part or all of the inner ejector pipe and the outer ejector pipe are arranged in the annular retaining ring; and / or the distance between the outer ejector pipe and the central axis of the burner is 25-35mm, and the distance between the inner ejector pipe and the central axis of the burner is 5-15mm.

[0008] In some embodiments, the bottom surface of the air cavity is in the shape of a circular truncated cone with a large lower end and a small upper end, which comprises a flat section and an inclined section, the flat section is fixedly connected between the peripheral wall of the inner ring air cavity and the upper end of the inclined section; the annular retaining ring is integrally formed at the bottom of the inclined section, and the passage is arranged at the lower end or the radially outer side of the inclined section.

[0009] In some embodiments, a plurality of circumferentially spaced gaps are arranged at the lower end of the annular retaining ring; and / or a mounting hole is arranged at the bottom surface of the air cavity radially inward of the annular retaining ring; and / or a pressing portion extending downward is integrally formed at the bottom of the burner.

[0010] In some embodiments, the pressing portion is a clamping groove arranged between the annular retaining ring and the mounting hole and opening downward; or an inclined surface or an arc surface inclined or curved from top to bottom is formed at the bottom of the annular retaining ring, and the pressing portion is formed by the inclined surface or the arc surface.

[0011] In some embodiments, a central protrusion extending upward is integrally formed at the bottom surface of the inner ring air cavity, an annular cavity is formed between the central protrusion and the outer cavity wall surface of the inner ring air cavity, and the annular cavity is in communication with the outlet of the inner ejector pipe.

[0012] In some embodiments, a stop portion is arranged in the annular cavity close to the outlet of the inner ejector pipe, and the stop portion causes the inner ring gas flowing out of the inner ejector pipe to flow in the same direction into the annular cavity.

[0013] In some embodiments, a gas blocking plate is further arranged in the inner ring air cavity above the outlet of the inner ejector pipe, one end of the gas blocking plate is connected to the central protrusion, and the other end abuts against or is clamped to the outer cavity wall surface of the inner ring air cavity.

[0014] In some embodiments, the gas blocking plate comprises a circular plate and an arc plate, the circular plate is arranged on the top of the central protrusion, and one end of the arc plate is integrally formed with the circular plate and the other end abuts against or is clamped to the outer cavity wall surface of the inner ring air cavity.

[0015] In some embodiments, a plurality of gas holes are arranged on the arc plate; and / or a limiting groove is recessed at the end of the arc plate away from the circular plate, and a positioning portion is protruded on the outer cavity wall surface of the inner ring air cavity corresponding to the position of the limiting groove, and the positioning portion is clamped to the limiting groove.

[0016] According to the above-mentioned updraft burner, the technical scheme is implemented as follows:

[0017] An upwind burner, comprising: a base assembly having a support table in a circular shape and a gas outlet seat arranged outside the support table and fixedly connected with the support table, the gas outlet seat comprising an outer ring gas outlet seat and an inner ring gas outlet seat arranged in parallel and in the same direction; and a burner assembly as described above, the burner being arranged on the top of the support table, the bottom surface of the annular baffle ring abutting and fitting with the top surface of the support table, the inlet of the outer ejector pipe being in communication with the outer ring gas outlet seat, and the inlet of the inner ejector pipe being in communication with the inner ring gas outlet seat.

[0018] The upwind burner, the diameter of the support table is greater than or equal to the outer diameter of the annular baffle ring, and is less than the maximum outer diameter of the burner; and / or the outer ring gas outlet seat and the inner ring gas outlet seat are arranged in a staggered manner, and the distance between the two is greater than 35 mm.

[0019] The upwind burner, the support table is integrally formed with two bosses extending outward and arranged side by side and spaced apart near one end of the gas outlet seat, and the two bosses are integrally formed with the outer ring gas outlet seat and the inner ring gas outlet seat, respectively; and / or a plurality of support feet extending downward and a connecting arm are integrally formed at the bottom of the support table, the opposite ends of the connecting arm are integrally formed with the lower end of the outer ring gas guide pipe 1211 and the lower end of the inner ring gas guide pipe, respectively, and a support portion is arranged at the bottom or the lower end of the outer side wall of the connecting arm.

[0020] Compared with the prior art, the present application has at least the following advantages:

[0021] 1. The burner assembly of the present application, by arranging an annular baffle ring at the bottom of the air cavity of the burner, the annular baffle ring can be in contact with the top surface of the support table of the base assembly to keep the burner assembly horizontal after installation, prevent the burner assembly from pressing and shaking, and at the same time, the annular baffle ring can position the ejector of the burner to ensure the concentricity of the ejector of the burner and the nozzle of the base assembly.

[0022] 2. By arranging a channel on the outer cavity wall surface or the cavity bottom surface of the air cavity of the burner, which is located radially outward of the annular baffle ring, the secondary air can flow into the channel upward along the annular baffle ring, thereby supplementing the secondary air in the air cavity, and after the overflow liquid in the air cavity is discharged from the channel, it can flow into the liquid container along the annular baffle ring. It can be seen that the annular baffle ring can guide the secondary air and the overflow liquid. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is an exploded view of the burner assembly in the embodiment of the present application;

[0024] Figure 2 is a sectional view of the burner assembly in the embodiment of the present application;

[0025] Figure 3 is a structural diagram of the igniter in an embodiment of the present application Figure 1 ;

[0026] Figure 4 is a structural diagram of the igniter in an embodiment of the present application Figure 2 ;

[0027] Figure 5 is an exploded view of the upper air inlet burner in an embodiment of the present application

[0028] Figure 6 is a sectional view of the upper air inlet burner in an embodiment of the present application Figure 1 ;

[0029] Figure 7 is a sectional view of the upper air inlet burner in an embodiment of the present application Figure 2 ;

[0030] Figure 8 is a structural diagram of the base assembly in an embodiment of the present application

[0031] Figure 9 is a structural diagram of the base body in an embodiment of the present application

[0032] Figure 10 is a sectional view of the base assembly in an embodiment of the present application Figure 1 ;

[0033] Figure 11 is a sectional view of the base assembly in an embodiment of the present application Figure 2 .

[0034] In the figure: 1 - base assembly, 101 - base body, 102 - outer ring nozzle, 103 - inner ring nozzle, 104 - air inlet connector, 11 - support table, 121 - outer ring air outlet seat, 1211 - outer ring air guide pipe, 122 - inner ring air outlet seat, 1221 - inner ring air guide pipe, 13 - annular step, 131 - mounting position, 14 - boss, 15 - positioning column, 16 - support leg, 17 - connecting arm, 171 - support part, 18 - assembly hole

[0035] 2 - igniter, 211 - outer ejector pipe, 212 - inner ejector pipe, 221 - air cavity, 222 - outer ring air cavity, 223 - inner ring air cavity, 2231 - center protrusion, 2232 - upper fixing hole, 2233 - lower groove, 2234 - stop part, 2235 - positioning part, 23 - annular stop 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 part

[0036] 3 - Ignition assembly, 31 - Support; 4 - Flame cap assembly; 5 - Baffle, 51 - Circular plate, 52 - Arc plate, 521 - Air hole, 522 - Limiting slot. DETAILED DESCRIPTION

[0037] The following examples illustrate the present application but do not limit the present application. Modifications and equivalent replacements to the specific embodiments of the present application or to some technical features without departing from the spirit of the present application should be covered in the technical solution range claimed by the present application.

[0038] REFERENCE Figures 1-7 The present embodiment provides a burner assembly, which comprises a burner 2 and a baffle 5, wherein the burner 2 has coaxially arranged and upwardly open air cavity 221, outer ring air cavity 222 and inner ring air cavity 223, the air cavity 221 is located between the outer ring air cavity 222 and the inner ring air cavity 223, in the present embodiment, the orthographic projection of the air cavity 221 and the inner ring air cavity 223 is configured to cover the support table 11 of the base assembly 1 together, while the outer ring air cavity 222 is configured to cover the nozzle and the air outlet seat of the base assembly 1 respectively.

[0039] An outer ejector pipe 211 and an inner ejector pipe 212 are integrally formed at the bottom of the burner 2 and arranged in parallel and in the same direction, the outlet of the outer ejector pipe 211 is communicated with the outer ring air cavity 222, and the gas flows along the clockwise direction after entering the outer ring air cavity 222 from the outer ejector pipe 2111, the outlet of the inner ejector pipe 212 is communicated with the inner ring air cavity 223. In addition, a downwardly extending annular baffle 23 is integrally formed at the bottom of the air cavity 221, the annular baffle 23 is configured to contact the top surface of the support table 1 of the base assembly 1 to keep the burner assembly horizontal after installation, prevent the burner assembly from pressing and shaking, and at the same time, the annular baffle 23 plays a positioning role for the ejector of the burner 1, and ensures the concentricity of the ejector of the burner and the nozzle of the base assembly.

[0040] A channel 24 located radially outside the annular baffle 23 is opened on the outer cavity wall surface or the cavity bottom surface of the air cavity 221, so that the secondary air can flow into the channel 24 upward along the annular baffle 23, realizing the supplement of the secondary air to the air cavity 2211, and after the overflow liquid in the air cavity 221 is discharged from the channel 24, it can flow into the liquid container along the annular baffle, it can be seen that the annular baffle 23 can play a guiding role for the secondary air and the overflow liquid.

[0041] REFERENCE Figure 4In the embodiment, the outer ejector pipe 211 and the inner ejector pipe 212 are respectively located at opposite sides of the inner ring air cavity 223 or the central axis of the distributor 2, and part or all of the inner ejector pipe 212 and the outer ejector pipe 211 are arranged in the annular retaining ring 23, so that the annular retaining ring 23 can shield part or all of the inner ejector. In addition, the distance between the outer ejector pipe 211 and the central axis of the distributor 2 is 25-35 mm, and the distance between the inner ejector pipe 212 and the central axis of the distributor 2 is 5-15 mm, so as to avoid the air flow of the inner and outer ejector pipes when ejecting primary air, and the air flow will not interfere with each other due to too close distance.

[0042] Reference Figures 1-5 In the embodiment, the bottom surface of the air cavity 221 is a circular truncated cone with a large lower end and a small upper end, which includes a flat section and an inclined section, and the flat section is integrally formed between the peripheral wall of the inner ring air cavity 223 and the upper end of the inclined section. An annular retaining ring 23 extending downward is integrally formed at the lower periphery of the inclined section of the air cavity 221, and a channel 24 is arranged on the outer cavity wall surface of the air cavity 221, so that the channel 24 is located radially outside the inclined section. Thus, the secondary air flows upward along the inclined section of the distributor, which is beneficial to reduce the height of the upper air inlet burner, and the secondary air flowing upward along the inclined section due to thermal action is also beneficial to the flow of the secondary air, reducing the flow resistance; the overflow liquid falls to the bottom surface of the air cavity 221 and then flows along the inclined section and the annular retaining ring 23 to the liquid container. In other embodiments, the annular retaining ring 23 can be integrally formed at the lower end of the inclined section of the air cavity 221, and at this time, the channel 24 can be arranged at the lower end of the inclined section of the air cavity 221 and radially outside the annular retaining ring 23, so that the diameter of the annular retaining ring 23 can be further reduced, and correspondingly, the volume of the support table 11 can be further reduced.

[0043] A plurality of notches 231 are arranged at the lower end of the annular retaining ring 23 in a circumferential direction, which can save materials while not affecting the supporting effect, and facilitate the passage of air and overflow liquid. Figure 4In the embodiment, the annular retaining ring 23 comprises a first arc segment 2301, a second arc segment 2302 and a third arc segment 2303 arranged circumferentially and spaced apart. The first arc segment 2301 is arranged radially outside the inner ejector pipe 212 and integrally formed at one end with the gas inlet end of the inner ejector pipe 212 and at the other end with the gas outlet end of the outer ejector pipe 211. The gas outlet end of the inner ejector pipe 212 is spaced apart from the first arc segment 2301, so that the first arc segment 2301 can cover most of the inner portion of the inner ejector pipe 212. The second arc segment 2302 is arranged radially outside the outer ejector pipe 211 and integrally formed at opposite ends with the gas inlet end and the gas outlet end of the outer ejector pipe 211, respectively, for covering the middle segment of the outer ejector pipe 211. The third arc segment 2303 is integrally formed between the inlet of the inner ejector pipe and the inlet of the outer ejector pipe. A notch 231 is provided at the lower end of the first arc segment 2301 and the second arc segment 2302, respectively. A passage 24 is provided radially outside the first arc segment 2301, the second arc segment 2302 and the third arc segment 2303 to increase the secondary air supplement area and solve the problem of excessive CO content in the flue gas of the burner. In other embodiments, the passage 24 in the third arc segment 2303 can be omitted to avoid liquid overflow along the passage 24 to the inlets of the inner and outer ejector pipes, thereby blocking the nozzles at the inlets of the ejector pipes.

[0044] Reference Figures 1-4 An installation hole 26 is formed in the bottom surface of the air cavity 221 radially inside the annular retaining ring 23 for vertically passing through the ignition assembly 3. In addition, a pressing portion 27 extending downward is integrally formed at the bottom of the air cavity 221 of the distributor 2, which is configured to tightly press the support 31 of the ignition assembly 3 against the top surface of the support table 11 of the base assembly 1, as shown in Figure 7 to improve the installation stability and reliability of the ignition assembly 3. The specific structure of the pressing portion 27 includes but is not limited to any one of the following:

[0045] Firstly, an inclined or curved surface is formed at the bottom of the annular retaining ring 23 near the support 31 or the installation hole 26. In the embodiment, an inclined or curved surface is formed at the bottom of the first arc segment 2301 near one end of the gas outlet end of the outer ejector pipe 211, which constitutes the pressing portion 27.

[0046] Secondly, the pressing portion 27 is a clamping groove located between the installation hole and the annular retaining ring and opening downward, which is configured to be clamped outside the support 31 of the ignition assembly 3 and tightly press the support 31 against the top surface of the support table 11.

[0047] Reference Figures 1-4A center protrusion 2231 extending upward is integrally formed on the bottom surface of the inner ring gas cavity 223, and an annular cavity (not shown in the figure) is formed between the center protrusion 2231 and the outer cavity wall surface of the inner ring gas cavity 223, which is in communication with the outlet of the inner ejector pipe 212. At this time, the gas flows clockwise after flowing into the annular cavity from the inner ejector pipe 212. It can be seen that the center protrusion 2231 is used to support and fix the gas baffle 5, and also to make the gas flow clockwise after entering the inner ring gas cavity 223. In this embodiment, an upwardly opening upper fixing hole 2232 is formed on the upper end of the center protrusion 2231, which is used to fix the gas baffle 5 installed on the top of the center protrusion 2231; a downwardly opening lower groove 2233 is formed on the lower end of the center protrusion 2231, which is used to save material and facilitate demolding, thereby reducing the cost.

[0048] A stop portion 2234 is arranged near the outlet of the inner ejector pipe 212 in the annular cavity, and the stop portion 2234 is integrally formed with the cavity bottom surface and the inner and outer cavity wall surfaces of the annular cavity, respectively, and the top of the stop portion 2234 is lower than the top of the center protrusion. The stop portion is used to prevent the inner ring gas flowing from the inner ejector pipe 212 from being divided and flowing out along the opposite two outer sides of the center protrusion 2231, so that the inner ring gas flowing from the inner ejector pipe 212 flows in the same direction (for example, counterclockwise) into the annular cavity. A positioning portion 2235 vertically arranged and close to the outlet of the inner ejector pipe 212 is provided on the top of the stop portion 2234, and the positioning portion 2235 is integrally formed with the top of the center protrusion 2231 and the outer side wall surface of the inner ring gas cavity 223, respectively, which is used to pre-position the gas baffle 5 to prevent the gas baffle 5 from rotating relative to the center protrusion 2231 and moving.

[0049] Embodiment 2

[0050] Reference Figures 1-2 The difference between this embodiment and embodiment 1 is that the spark distributor assembly further includes a gas baffle 5, which is arranged in the inner ring gas cavity 223 and located above the stop portion 2234 and the outlet of the inner ejector pipe 212, respectively. One end of the gas baffle 5 is connected with the center protrusion 2231, and the other end is in abutment or clamped with the outer cavity wall surface of the inner ring gas cavity 223, which is used to prevent the inner ring gas flowing out of the inner ejector pipe 212 from flowing directly upward, prevent the gas flow rate at the outlet of the inner ejector pipe 212 from being too fast, solve the problem of uneven distribution of gas pressure, and solve the problem of uneven length of the flame.

[0051] The air baffle 5 comprises a circular plate 51 and an arc-shaped plate 52, the circular plate 51 is arranged on the top of the central protrusion and is positioned on the central protrusion 2231 through a connecting member (for example, a positioning pin or a screw), one end of the arc-shaped plate 52 is integrally formed with the circular plate 51, and the other end abuts or is clamped with the outer cavity wall surface of the inner ring air cavity 223. In this embodiment, a plurality of gas holes 521 for the gas to pass through are arranged on the arc-shaped plate 52, so that part of the gas can flow into the air baffle 5 through the gas holes 521, preventing the size of the combustion flame above the air baffle 5 from being affected due to the arrangement of the air baffle 5. A limiting groove 522 is recessed at one end of the arc-shaped plate 52 away from the circular plate 51, and a positioning portion 2235 is protruded at a position corresponding to the limiting groove 522 on the outer cavity wall surface of the inner ring air cavity 223, the positioning portion 2235 is clamped with the limiting groove 522 to pre-position the air baffle 5, preventing the air baffle 5 from rotating and moving relative to the central protrusion 2231.

[0052] Embodiment 3

[0053] Reference Figures 5-11 The present embodiment provides an updraft burner, which comprises a base assembly 1 and a burner assembly as described in Embodiment 1 or 2. The base assembly 1 comprises a base body 101 having a support table 11 and a gas outlet seat (not shown in the figure), the support table 11 is circular, and the gas outlet seat is arranged outside the support table 11 and integrally formed with the support table 11. The gas outlet seat comprises an outer ring gas outlet seat 121 and an inner ring gas outlet seat 122 arranged in parallel and in the same direction, so that the structure of the base body 101 is simpler, which is beneficial to reducing the volume of the base body 101, and only the outer ring gas outlet seat 121 and the inner ring gas outlet seat 122 are exposed on the cooktop panel, reducing the exposed gas outlet seat and the cleaning dead angle, making cleaning more convenient. In addition, by arranging the gas outlet seat outside the support table 11 and fixedly connecting the gas outlet seat with the support table 11, the outer projection of the outer ring air cavity 222 of the burner 2 can cover the gas outlet seat and the nozzle mounted on the gas outlet seat, thereby preventing the overflow liquid after the pot overflow from blocking the pore diameter of the nozzle. In this embodiment, the outer ring gas outlet seat 121 and the inner ring gas outlet seat 122 are arranged in a staggered manner, and the distance between the two is greater than 35 mm, which is beneficial to cleaning, so that the air flow flowing when the nozzle injects primary air will not interfere with each other due to too close distance.

[0054] The base assembly 1 further comprises nozzles, the nozzles comprising an outer ring nozzle 102 and an inner ring nozzle 103, the outer ring nozzle 102 being 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 being directed upward above the support table 11, and the inner ring nozzle 103 being 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 being directed upward above the support table 11. The base assembly 1 further comprises two air inlet joints 104, which are respectively installed at the lower end of the outer ring air outlet seat 121 and the inner ring air outlet seat 122.

[0055] The diffuser is arranged on the top of the support table 11, the bottom surface of the annular retaining ring 23 abuts against and is in close contact with the top surface of the support table 11, the inlet of the outer ejector pipe 211 is connected in communication with the outer ring air outlet seat 121 through the outer ring nozzle 102, and the inlet of the inner ejector pipe 212 is connected in communication with the inner ring air outlet seat 122 through the inner ring nozzle 103, so that the annular retaining ring 23 is in surface contact with the top surface of the support table 11 of the base assembly 1, so that the diffuser 2 is kept horizontal after installation, and the phenomenon of pressing and shaking of the diffuser 2 is prevented, and the ejector of the diffuser 2 plays a positioning role, and the concentricity of the ejector of the diffuser 2 and the nozzle of the base assembly 1 is ensured. In the embodiment, the orthographic projection of the diffuser 2 covers the support table 11, the air outlet seat and the nozzle installed on the air outlet seat, so as to hide the support table 11, the air outlet seat and the nozzle at the bottom of the diffuser 2, and prevent the splashed liquid from blocking the nozzle after the pot overflows.

[0056] With reference to Figures 6-7 , the diameter of the support table 11 is greater than or equal to the outer diameter of the annular retaining ring 23, and is less than the maximum outer diameter of the diffuser 2. In the embodiment, the outer diameter of the annular retaining ring 23 is the same as the diameter of the support table 11, so as to ensure that the support table 11 stably and reliably supports the annular retaining ring 23, reduce the volume of the base body 101, and make the support table 11 be completely covered by the orthographic projection of the diffuser 2, so as to completely hide the support table 11 at the bottom of the diffuser 2.

[0057] With reference to Figures 8-11 , an annular step 13 extending outward is integrally formed at the lower end of the peripheral wall of the support table 11, the annular step 13 serves as a stove panel mounting surface, the top surface of the annular step 13 is 2-3 mm lower than the top surface of the support table 11, and the width of the annular step 13 is 2-3 mm. A plurality of mounting positions 131 are arranged on the annular step 13 in a circumferential direction, the mounting positions 131 can be connected with the stove panel through screws, and the orthographic projection of the diffuser 2 covers the annular step 13 and all the mounting positions 131, so that the mounting positions 131 are closer to the center of the upper air inlet burner and are not exposed outside the diffuser 2, thereby preventing the panel mounting screws from rusting due to being exposed outside the diffuser 2 without being shielded.

[0058] The outer ring gas outlet seat 121 is a vertically arranged outer ring gas guide pipe 1211, which has a vertically arranged outer ring gas channel (see Figure 10 ). The upper and lower ends of the outer ring gas guide pipe 1211 are respectively provided with an outer ring gas inlet and an outer ring gas outlet which are in communication with the outer ring gas channel. The outer ring gas outlet is in communication with the outer ejector pipe 211 through the outer ring nozzle 102. The inner ring gas outlet seat 122 is a vertically arranged inner ring gas guide pipe 1221, which has a vertically arranged inner ring gas channel (see Figure 11 ). The upper and lower ends of the inner ring gas guide pipe 1221 are respectively provided with an inner ring gas inlet and an inner ring gas outlet which are in communication with the inner ring gas channel. The inner ring gas outlet is in communication with the inner ejector pipe 212 through the inner ring nozzle 103. It can be seen that the inner and outer ring gas guide pipes 1211 are both free of branch structures. When the gas with a certain pressure flows directly into the nozzle through the vertically arranged gas guide pipe without branch structure, the resistance loss of the flow channel branch is reduced, the speed and flow rate of the gas out of the nozzle 102 are improved, which is beneficial to improve the performance of the gas in ejecting primary air, the combustion is more complete, and the content of CO in the flue gas is reduced.

[0059] A positioning structure is arranged between the inner ring gas outlet seat 122 and / or the outer ring gas outlet seat 121 and the distributor 2 to position the distributor and prevent eccentricity of the distributor 2 installed on the base assembly 1. In the embodiment, the positioning structure includes a positioning column 15 and a positioning groove 25 which are matched and inserted. The positioning column 15 is integrally formed on the top of the inner ring gas outlet seat 122 and / or the outer ring gas outlet seat 121, and the positioning groove 25 is recessed on the bottom of the distributor 2 at a position corresponding to the positioning column 15.

[0060] Referring to Figures 8-11 , two bosses 14 which are extended outward and arranged side by side are integrally formed on one end of the support table 11 close to the gas outlet seat. The free ends of the two bosses 14 are integrally formed with the outer ring gas outlet seat 121 and the inner ring gas outlet seat 122 respectively. Of course, the two bosses 14 can also be omitted. The lower ends of the outer ring gas guide pipe 1211 and the inner ring gas guide pipe 1221 are both extended downward below the support table 11. A plurality of support legs 16 and a connecting arm 17 which are extended downward are integrally formed on the bottom of the support table 11. The opposite ends of the connecting arm 17 are integrally formed with the lower ends of the outer ring gas guide pipe 1211 and the inner ring gas guide pipe 1221 respectively. In the embodiment, a support portion 171 is integrally formed on the bottom or the outer side wall lower end of the connecting arm 17. The support portion 171 is located between the outer ring gas guide pipe 1211 and the inner ring gas guide pipe 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. In this way, the connecting arm 17 can not only serve as a support leg 16, but also play a role in connecting and fixing the inner and outer gas guide pipes and strengthening the strength of the base body 101.

[0061] Referring to Figures 5-9The updraft combustion burner further comprises an ignition assembly 3, an assembly hole 18 is arranged at one end of the support platform 11 away from the air outlet seat, and the lower end of the ignition assembly 3 is vertically arranged in the assembly hole 18, so that only the inner and outer air outlet seats and one ignition assembly 3 are exposed on the support platform 11 of the base assembly 1, and the base body 101 is simple and easy to clean. The damper 2 is provided with a mounting hole 26 at a position corresponding to the assembly hole 18, the mounting hole 26 is arranged on the bottom surface of the air cavity 221 and is located on the radially inner side of the annular retaining ring 23, and in this embodiment, the mounting hole 26 is arranged on the radially inner side of the first arc segment 2301 of the annular retaining ring 23, and the upper end of the ignition assembly 3 is vertically arranged in the mounting hole 26.

[0062] The ignition assembly 3 is provided with a support 31 abutting against the top of the support platform 11, and the bottom of the damper 2 is integrally formed with a pressing portion 27 extending towards the support 31, the pressing portion 27 can tightly press the support 31 on the top surface of the support platform 11, so as to improve the installation stability and reliability of the ignition assembly 3.

[0063] Reference Figures 5-7 The updraft combustion burner further comprises a fire cover assembly 4, the fire cover assembly 4 is arranged on the top of the damper 2 and covers the upward opening of the outer ring air cavity 222 and the inner ring air cavity 223, respectively.

[0064] The above only describes some embodiments of the present application. For ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A flasher assembly, characterized by, The igniter (2) has coaxially arranged air cavity (221), outer ring air cavity (222) and inner ring air cavity (223), the air cavity (221) is located between the outer ring air cavity (222) and the inner ring air cavity (223), The outer ejector pipe (211) and the inner ejector pipe (212) are arranged in parallel and in the same direction at the bottom of the igniter (2), the outlet of the outer ejector pipe (211) is communicated with the outer ring air cavity (222), and the outlet of the inner ejector pipe (212) is communicated with the inner ring air cavity (223), The annular retaining ring (23) extending downward is arranged at the bottom of the air cavity (221), and the passage (24) located on the radial outside of the annular retaining ring (23) is arranged on the outer cavity wall surface or the cavity bottom surface of the air cavity (221). The cavity bottom surface of the air cavity (221) is in the shape of a circular truncated cone with a large lower end and a small upper end, and includes a flat section and an inclined section, the flat section is fixedly connected between the peripheral wall of the inner ring air cavity (223) and the upper end of the inclined section, the annular retaining ring (23) is integrally formed at the bottom of the inclined section, and the passage (24) is arranged at the lower end or the radial outside of the inclined section. The center protrusion (2231) extending upward is integrally formed on the cavity bottom surface of the inner ring air cavity (223), and the annular cavity is formed between the center protrusion (2231) and the outer cavity wall surface of the inner ring air cavity (223), and the annular cavity is communicated with the outlet of the inner ejector pipe (212).

2. A flasher assembly according to claim 1, wherein Part or all of the inner ejector pipe (212) and the outer ejector pipe (211) are arranged in the annular retaining ring (23), and / or the distance between the outer ejector pipe (211) and the central axis of the igniter (2) is 25-35 mm, and the distance between the inner ejector pipe (212) and the central axis of the igniter (2) is 5-15 mm.

3. A spark distributor assembly according to claim 1 or 2, wherein A plurality of notches (231) are arranged in a circumferential direction at the lower end of the annular retaining ring (23); and / or The mounting hole (26) located on the radial inside of the annular retaining ring (23) is arranged on the cavity bottom surface of the air cavity (221); and / or The pressing part (27) extending downward is integrally formed at the bottom of the igniter (2).

4. A distributor assembly according to claim 3, wherein The pressing part (27) is a clamping groove located between the annular retaining ring (23) and the mounting hole (26) and opening downward, or the inclined surface or the arc surface inclined or curved from top to bottom is formed at the bottom of the annular retaining ring (23), and the pressing part (27) is formed by the inclined surface or the arc surface.

5. A flasher assembly according to claim 4, wherein The stop part (2234) is arranged close to the outlet of the inner ejector pipe (212) in the annular cavity, and the stop part (2234) makes the inner ring gas flowing out of the inner ejector pipe (212) flow in the same direction into the annular cavity.

6. A spark distributor assembly according to claim 4 or 5, wherein Further comprising a baffle plate (5) arranged in the inner ring air cavity (223) and above the outlet of the inner ejector pipe (212), one end of the baffle plate (5) is connected with the center protrusion (2231), and the other end is in abutment or clamped with the outer cavity wall surface of the inner ring air cavity (223).

7. A flasher assembly according to claim 6, wherein The baffle plate (5) comprises a circular plate (51) and an arc-shaped plate (52), the circular plate (51) is installed on the top of the center protrusion (2231), one end of the arc-shaped plate (52) is integrally formed with the circular plate (51), and the other end is in abutment or clamped with the outer cavity wall surface of the inner ring air cavity (223).

8. A flasher assembly according to claim 7, wherein A plurality of air holes (521) are arranged on the arc-shaped plate (52); and / or a limiting groove (522) is concavely arranged at one end of the arc-shaped plate (52) away from the circular plate (51), a positioning portion (2235) is protrusively arranged on the outer cavity wall surface of the inner ring air cavity (223) at a position corresponding to the limiting groove (522), and the positioning portion (2235) is clamped in cooperation with the limiting groove (522).

9. A top air fired burner characterized by, Comprise: A base assembly (1) having a support table (11) in a circular shape and an air outlet seat, the air outlet seat is arranged outside the support table (11) and fixedly connected with the support table (11), 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 A kind of distributor assembly as claimed in any one of claims 1-8, the distributor (2) is arranged on the top of the support table (11), the bottom surface of the annular baffle ring (23) is in abutment and fits with the top surface of the support table (11), the inlet of the outer ejector pipe (211) is communicated with the outer ring air outlet seat (121), and the inlet of the inner ejector pipe (212) is communicated with the inner ring air outlet seat (122).

10. A top air burner as claimed in claim 9, wherein The diameter of the support table (11) is greater than or equal to the outer diameter of the annular baffle ring (23), and less than the maximum outer diameter of the distributor (2); and / or the outer ring air outlet seat (121) and the inner ring air outlet seat (122) are arranged in staggered positions, and the distance between them is greater than 35 mm.

11. A top air burner as claimed in claim 9, wherein Two bosses (14) integrally formed on one end of the support table (11) close to the air outlet seat are arranged in extension and in parallel and spaced apart, and the two bosses (14) are integrally formed with the outer ring air outlet seat (121) and the inner ring air outlet seat (122) respectively; and / or a plurality of support legs (16) and a connecting arm (17) integrally formed on the bottom of the support table (11) extend downward, the opposite ends of the connecting arm (17) are integrally formed with the lower end of the outer ring air guide pipe (1211) and the lower end of the inner ring air guide pipe (1221) respectively, and a supporting portion (171) is arranged on the bottom or the lower end of the outer side wall of the connecting arm (17).

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