A fire distributor and its upper air inlet burner

Abstract

The present invention discloses a fire divider and an upper air inlet burner thereof. The fire divider comprises: a fire divider body having an inner air mixing chamber opening upward and an outer air mixing chamber opening upward, a mounting port being provided at the lower end of the outer side wall of the inner air mixing chamber, and a secondary air inlet being formed between the inner air mixing chamber and the outer air mixing chamber; an inner ejector tube being transversely passed through the mounting port and detachably connected to the fire divider body, the inner ejector tube comprising a diffuser section, part or all of which is transversely passed through the mounting port and extends into the inner air mixing chamber; and an outer ejector tube being integrally formed and arranged at the bottom of the fire divider body and located radially outward of the secondary air inlet. The fire divider of the present invention has a simple structure, reduces the resistance loss of the inner ejector tube, improves the ejection capacity of the inner ejector tube, meets the burner performance and processing and manufacturing process requirements, and at the same time ensures that the area of the secondary air inlet is maximized.

Description

Technical Field

[0001] The present invention relates to the technical field of stoves, in particular to a fire distributor and an upper air inlet burner thereof. Background Art

[0002] The ejector tube of the existing upper air inlet burner has the following shortcomings: the inner ring ejector tube adopts a straight tube design, which results in insufficient primary air, causing the inner ring fire to be weak; the outer ring ejector crosses the mixing chamber or secondary air inlet of the inner ring fire, causing insufficient secondary air area, resulting in excessive CO content in the flue gas.

[0003] The base or ignition distributor of an updraft burner is typically made of cast iron or die-cast aluminum, which is prone to corrosion. This can lead to poor contact between the base and the ignition distributor, resulting in ignition failure or accidental extinction. Furthermore, the inner ring nozzles of existing updraft burners are mounted vertically, making them prone to clogging. Furthermore, the two nozzles are located on the same side of the base, which can easily cause airflow interference between the nozzles, affecting combustion performance. Summary of the Invention

[0004] The present invention aims to at least partially address one of the problems existing in the prior art. To this end, the present invention provides a flame distributor with a simple structure that reduces resistance losses in the inner ejector tube, improves the ejection capacity of the inner ejector tube, meets burner performance and manufacturing requirements, and maximizes the area of the secondary air inlet. The present invention also provides an upper air intake burner.

[0005] According to the above-mentioned fire distributor, it is realized by the following technical solutions:

[0006] A fire divider comprises: a fire divider body, having an inner air mixing chamber opening upward and an outer air mixing chamber opening upward, the outer air mixing chamber being located outside the inner air mixing chamber, a mounting port communicating with the inner air mixing chamber being provided at the lower end of the outer side wall of the inner air mixing chamber, and a secondary air inlet being formed between the inner air mixing chamber and the outer air mixing chamber; an inner ejector tube being transversely passed through the mounting port and detachably connected to the fire divider body, the inner ejector tube comprising a diffuser section, part or all of the diffuser section being transversely passed through the mounting port and extending into the inner air mixing chamber, the inner air mixing chamber being communicated with the diffuser section; and an outer ejector tube being integrally formed and arranged at the bottom of the fire divider body and being located radially outside the secondary air inlet, the air outlet end of the outer ejector tube being communicated with the outer air mixing chamber.

[0007] In some embodiments, the inner ejector tube further includes a suction section and a mixing section, the diffuser section is connected to the suction section through the mixing section, and a limiting flange extending outward is provided on the circumference of the outer side wall of the diffuser section or the mixing section, and the limiting flange is sealed and connected to the edge of the mounting port.

[0008] In some embodiments, a small plane is provided at the bottom of the diffuser section, and the small plane is flush with and abuts against the bottom surface of the mounting port and the bottom surface of the inner mixing cavity, respectively.

[0009] In some embodiments, the length of the diffuser extending into the inner mixing chamber is equal to the diameter of the inner mixing chamber.

[0010] In some embodiments, the inner ejector tube is made of aluminum alloy.

[0011] In some embodiments, there are two external ejector tubes, which are respectively arranged in parallel on the opposite outer sides of the internal ejector tube and located below the bottom of the internal mixing chamber. At least one external ejector tube is arranged opposite to the internal ejector tube, and the gas outlet end of the external ejector tube extends into the external mixing chamber.

[0012] In some embodiments, the external gas mixing chamber includes an annular mixing chamber, an outer ring air outlet and two head mixing grooves, the outer ring air outlet and the two head mixing grooves are respectively connected to the upper and lower ends of the annular mixing chamber, and the two head mixing grooves are arranged on the relatively outer sides of the inner gas mixing chamber, and the head mixing groove is formed by a partial integral downward extension of the bottom of the ignition divider body, and the head mixing groove has an inner groove wall facing the inner gas mixing chamber, and the gas outlet end of the external ejector tube passes through the inner groove wall horizontally and extends into the head mixing groove.

[0013] In some embodiments, the inner groove wall is arranged to be inclined or curved from top to bottom and radially inward; the head mixing groove also has two side groove walls arranged opposite to each other, and both of the side groove walls are arranged to be inclined from bottom to top and toward the direction away from the head mixing groove, and the slopes of the two side groove walls are different.

[0014] In some embodiments, a downwardly concave air guide groove is provided on the bottom surface of the head mixing tank at a position corresponding to the outlet of the external ejection tube, and the air guide groove is respectively connected to the outlet of the external ejection tube and the head mixing tank.

[0015] In some embodiments, the width of the annular mixing chamber in the radial direction is greater than the width of the outer ring air outlet in the radial direction; and / or the diameter of the outer ring air outlet gradually decreases from bottom to top.

[0016] In some embodiments, the external ejector tube includes an air inlet section and a straight pipe section, the straight pipe section transversely passes through the inner tank wall and extends into the head mixing tank, and the upper end of the straight pipe section is located above one of the side tank walls of the head mixing tank.

[0017] In some embodiments, a surface of the outer ejector tube facing the outer annular wall of the outer gas mixing chamber is an inclined surface, and the inclined surface is arranged obliquely along the circumferential direction of the outer gas mixing chamber.

[0018] In some embodiments, a downwardly opening positioning ring is provided at the bottom of the fire distributor body, and the positioning ring is coaxially arranged with the inner gas mixing chamber.

[0019] In some embodiments, an anti-overflow portion is provided on the circumference of the outer wall of the inner mixing chamber and extends toward the secondary air inlet.

[0020] In some embodiments, the overflow prevention portion is umbrella-shaped, and / or a positioning notch is provided on the radially outer side of the overflow prevention portion.

[0021] In some embodiments, a plurality of outwardly extending connecting ribs are circumferentially spaced apart at the radial outer end of the overflow prevention portion. The connecting ribs span the secondary air inlet and have radial outer ends fixedly connected to the inner annular wall of the outer mixing chamber.

[0022] In some embodiments, the connecting ribs are arranged from the inside out and tilted or curved downward; and / or at least one of the connecting ribs is provided with a positioning hole.

[0023] In some embodiments, the fire divider body includes a bottom shell and an upper cover, the bottom shell has the inner gas mixing chamber opening upward and the outer ring chamber opening upward, the upper cover is arranged on the top of the bottom shell and covers part or all of the top opening of the outer ring chamber, and the outer gas mixing chamber is formed between the bottom shell and the upper cover.

[0024] According to the above-mentioned upward air inlet burner, it is realized by the following technical solutions:

[0025] A top air inlet burner, comprising: an ignition distributor as described above; a base assembly, arranged at the bottom of the ignition distributor and having an inner ring air duct and an outer ring air duct, the inner ring air duct being connected to the air inlet end of the inner ejector tube, and the outer ring air duct being connected to the air inlet end of the outer ejector tube; a fire cover assembly, arranged at the top of the ignition distributor and covering the top opening of the inner mixing chamber and the top opening of the outer mixing chamber, respectively; and an ignition assembly, vertically penetrating the secondary air inlet of the ignition distributor, and the lower end of which is connected to the base assembly.

[0026] In some embodiments, the base assembly is fixed with an upwardly extending current conducting portion at a position corresponding to the inner gas mixing chamber, and the current conducting portion abuts or connects with the positioning ring on the ignition distributor to form reliable contact between the current conducting portion and the positioning ring.

[0027] In some embodiments, the base assembly is fixed with a positioning column extending upward, and the positioning column is plugged into a positioning hole on the ignition distributor.

[0028] In some embodiments, a mounting seat for supporting the ignition assembly is fixedly provided on the base assembly, the lower end of the ignition assembly is inserted into the mounting seat, and the upper end vertically passes through the positioning notch on the ignition distributor.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] 1. The ignition distributor of the present invention utilizes a split design for the inner ejector tube, which is detachably mounted at the bottom of the ignition distributor body. The diffuser section of the inner ejector tube extends into the inner gas mixing chamber, thereby improving the ejection capacity of the inner ejector tube and reducing resistance loss, thereby meeting the burner performance and inner ejector tube processing and manufacturing requirements.

[0031] 2. By integrally molding the external ejector tube at the bottom of the ignition distributor body and positioning it radially outward from the secondary air inlet, the external ejector tube is prevented from crossing the secondary air inlet or the internal mixing chamber, maximizing the area of the secondary air inlet, thereby improving combustion efficiency and resolving the issue of excessive CO content in the flue gas due to insufficient secondary air.

[0032] 3. By extending the outlet end of the external ejector tube into the external mixing chamber, it is beneficial to lengthen the external ejector tube, improve the ejection coefficient, and make the mixing more uniform;

[0033] 4. By arranging a positioning ring with a downward opening and a coaxial arrangement with the inner mixing chamber at the bottom of the ignition divider body, the positioning ring can form a reliable contact with the current conducting part on the base assembly, making full use of the bottom space of the ignition divider body while ensuring the conduction performance of the upper air inlet burner during ignition, thereby improving the ignition success rate and avoiding easy flameout due to poor contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of the fire distributor in the embodiment of the present invention. Figure 1 ;

[0035] Figure 2 This is a schematic diagram of the structure of the fire distributor in the embodiment of the present invention. Figure 2 ;

[0036] Figure 3 This is a cross-sectional view of the fire distributor in the embodiment of the present invention. Figure 1 ;

[0037] Figure 4 This is a cross-sectional view of the fire distributor in the embodiment of the present invention. Figure 2 ;

[0038] Figure 5This is a cross-sectional view of the fire distributor in the embodiment of the present invention. Figure 3 ;

[0039] Figure 6 2 is a schematic structural diagram of a bottom shell according to an embodiment of the present invention;

[0040] Figure 7 is a cross-sectional view of an upper cover according to an embodiment of the present invention;

[0041] Figure 8 2 is a schematic structural diagram of an inner ejector tube according to an embodiment of the present invention;

[0042] Figure 9 is a cross-sectional view of an inner ejector tube according to an embodiment of the present invention;

[0043] Figure 10 1 is a schematic structural diagram of a burner in an embodiment of the present invention;

[0044] Figure 11 This is a schematic structural diagram of a burner in an embodiment of the present invention with the fire cover assembly hidden;

[0045] Figure 12 is a cross-sectional view of an embodiment of the present invention wherein the fire distributor is mounted on top of a base assembly;

[0046] Figure 13 is a structural diagram of a base assembly in an embodiment of the present invention;

[0047] Figure 14 2 is a top view of the base assembly in an embodiment of the present invention.

[0048] In the figure: 1-base assembly, 11-base body, 111-inner ring air outlet seat, 112-outer ring air outlet seat, 113-convex edge, 114-inner ring air channel, 12-current conducting portion, 13-mounting seat, 141-positioning column, 1411-guide surface, 142-positioning protrusion, 151-inner ring nozzle, 152-outer ring nozzle;

[0049] 2-ignition distributor, 21-ignition distributor body, 2101-bottom shell, 2102-upper cover, 211-inner mixing chamber, 2111-mounting port, 2112-bump, 212-outer mixing chamber, 2120-head mixing tank, 21201-inner tank wall, 21202-side tank wall, 2121-annular mixing chamber, 2122-outer ring air outlet, 2123-air guide groove, 2124-inner ring wall, 213-secondary air inlet , 2141-upper flange, 2142-lower flange, 22-inner ejector tube, 221-suction section, 222-mixing section, 223-diffuser section, 224-limiting flange, 2241-lug, 225-small plane, 23-outer ejector tube, 231-inlet section, 232-straight pipe section, 233-inclined surface, 25-positioning ring, 26-anti-overflow part, 261-positioning notch, 262-connecting rib, 263-positioning hole;

[0050] 31-inner ignition cover, 32-outer ignition cover; 4-ignition assembly. DETAILED DESCRIPTION

[0051] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0052] Example 1

[0053] refer to Figure 1-4 This embodiment provides a flame divider, which is applied to an upper air inlet burner. The flame divider 2 includes a flame divider body 21, an inner ejector tube 22, and an outer ejector tube 23. The flame divider body 21 has an inner mixing chamber 211 opening upward and an outer mixing chamber 212 opening upward. The outer mixing chamber 212 is located outside the inner mixing chamber 211. A mounting port 2111 extending radially outward and communicating with the inner mixing chamber 211 is provided at the lower end of the outer side wall of the inner mixing chamber 211. The mounting port 2111 can be used to meet the requirements of the core pulling process. A secondary air inlet 213 for secondary air to pass through is formed between the outer mixing chamber 212 and the inner mixing chamber 211, so that secondary air can be added to the burner through the secondary air inlet 213 to make the combustion more complete.

[0054] The inner ejection tube 22 is transversely arranged through the mounting opening 2111 and is detachably connected to the ignition device body 21. In this embodiment, the inner ejection tube 22 is made of aluminum alloy. Figure 1-3 and Figure 8-9The inner ejector tube 22 includes an intake section 221, a mixing section 222, and a diffuser section 223, which are sequentially connected. Part or all of the diffuser section 223 is transversely arranged through the mounting opening 2111 and extends into the inner gas mixing chamber 211, thereby connecting the diffuser section 223 with the inner gas mixing chamber 211. It can be seen that by designing the inner ejector tube 22 as a split body and detachably mounting it at the bottom of the igniter body 21, the diffuser section 223 of the inner ejector tube 22 extends into the inner gas mixing chamber 211, thereby improving the ejection capacity of the inner ejector tube 22, reducing resistance loss, and effectively reducing the CO content in the flue gas. At the same time, it can meet the burner performance and the aluminum alloy processing and manufacturing process requirements of the inner ejector tube. Specific test results are shown in Table 1.

[0055] Table 1 Influence of the relationship between the inner ejector tube and the inner mixing chamber on the burner performance

[0056] Test indicators The inner ejector tube extends into the inner mixing chamber The inner ejector tube does not extend into the inner mixing chamber Inner ring nozzle φ0.94 φ0.94 Primary air coefficient a 0.7 0.60 Heat load (KW) 5.12 5.12 CO content in flue gas (ppm) 250 520

[0057] The national standard for CO content in burner flue gas sets a limit of 500 ppm. Table 2 clearly shows that extending the inner ejector tube 22 into the inner mixing chamber 211 increases the primary air coefficient (i.e., the ejection coefficient), significantly reducing the CO content in the flue gas. Furthermore, the diameter of the inner ring nozzle can be appropriately increased to further increase the burner's heat load.

[0058] The outer ejector tube 23 is integrally formed and disposed at the bottom of the ignition divider body 21, radially outward from the secondary air inlet 213. The air outlet of the outer ejector tube 23 communicates with the outer gas mixing chamber 212. Thus, by integrally forming the outer ejector tube at the bottom of the outer gas mixing chamber 212 of the ignition divider body 21, radially outward from the secondary air inlet 213, the outer ejector tube 23 is prevented from crossing the secondary air inlet 213 or the inner gas mixing chamber 211, maximizing the area of the secondary air inlet. This facilitates improved combustion efficiency and effectively addresses the issue of excessive CO content in the flue gas due to insufficient secondary air.

[0059] refer to Figure 1-3 and Figure 8-9 The suction section 221 forms the air inlet end of the inner ejector tube 22 and is trumpet-shaped, with its diameter gradually decreasing along the airflow direction; the mixing section 222 is a straight tube; and the diffuser section 223 forms the air outlet end of the inner ejector tube 22 and its diameter gradually increases along the airflow direction. In this embodiment, the central axis of the diffuser section 223 is eccentrically positioned relative to the center point of the bottom of the inner mixing chamber 211, and the length D1 of the diffuser section 223 extending into the inner mixing chamber 211 is equal to the diameter D2 of the inner mixing chamber 211. More preferably, the length D1 is equal to the diameter D2 The extension line of the cross section of the outlet of the inner ejector tube 22 passes through the central axis of the inner mixing chamber 211. In this way, without affecting the gas supply to the inner mixing chamber 211, it is beneficial to lengthen the overall length of the inner ejector tube 22, facilitate adding a diffusion section to the inner ejector tube 22, and improve the ejection capacity.

[0060] Furthermore, an outwardly extending limiting flange 224 is circumferentially provided on the outer sidewall of the diffuser section 223 or the mixing section 222. The limiting flange 224 is sealedly connected to the edge of the mounting opening 2111 to limit the installation depth of the inner ejector tube 22 and prevent air leakage at the connection. Furthermore, the limiting flange 224 and the edge of the mounting opening 2111 can be connected by screws or rivets. In this embodiment, outwardly extending protrusions 2112 are integrally formed on the opposing outer sidewalls of the mounting opening 2111. Lugs 2241 are integrally formed on the limiting flange 224 at positions corresponding to the protrusions, and the lugs are connected to the protrusions by screws or rivets.

[0061] Furthermore, a small plane 225 is provided at the bottom of the air outlet end of the inner ejector tube 22, that is, at the bottom of the diffuser section 223. When the inner ejector tube 22 is installed on the ignition distributor body 21, the small plane 225 is parallel to and abuts against the bottom surface of the mounting port 2111 and the bottom surface of the inner mixing chamber 211, respectively. In this way, the small plane 225 of the inner ejector tube 22 is closely abutted against the bottom surface of the inner mixing chamber 211 to improve the air tightness. Secondly, it serves as a guide for the installation of the inner ejector tube 22 to prevent installation misalignment. Thirdly, it can prevent the inner ejector tube 22 from rotating relative to the mounting port 2111.

[0062] refer to Figure 1-5 Furthermore, the outer ejector tube 23 is arranged below the bottom of the outer mixing chamber 212 to ensure that the arrangement of the outer ejector tube 23 does not interfere with the secondary air inlet 213, and the air outlet end of the outer ejector tube 23 extends into the outer mixing chamber 212, and the distance between the outlet of the outer ejector tube 23 and the outer ring wall of the outer mixing chamber 212 is not less than the distance between the inner and outer ring walls of the outer mixing chamber 212. and no greater than Preferably This is beneficial for extending the length of the external ejector tube 23, improving the ejection coefficient, making the mixed gas more uniform, and effectively reducing the CO content in the flue gas. For specific test results, see Table 2.

[0063] Table 2 Influence of the relationship between the external ejector tube and the external mixing chamber on the burner performance

[0064] Test indicators The external ejector tube extends into the external mixing chamber The external ejector tube does not extend into the external mixing chamber Outer ring nozzle φ1.08 φ1.08 Primary air coefficient a 0.71 0.65 Heat load (KW) 5.12 5.12 CO content in flue gas (ppm) 250 560

[0065] It can be directly seen from Table 2 that compared with the case where the external ejector tube is not extended into the external mixing chamber, the present application significantly improves the primary air coefficient (i.e., the ejection coefficient) by extending the external ejector tube 23 into the head mixing tank 2120 of the external mixing chamber 212, while greatly reducing the CO content in the flue gas; in addition, the diameter of the outer ring nozzle can be appropriately increased to further increase the heat load of the burner.

[0066] Furthermore, there are two outer ejector tubes 23, each arranged parallel to the inner ejector tube 22 on opposite sides thereof and located below the bottom of the inner mixing chamber 211. At least one outer ejector tube 23 is arranged in the opposite direction of the inner ejector tube 22. This arrangement increases the spacing between the two outer ejector tubes 23, thereby increasing the spacing between the two outer ejector tubes 23 to 80 mm. This also prevents interference with the secondary air inlet 213, maximizing the area of the secondary air passage. In this embodiment, the two outer ejector tubes 23 are arranged in parallel and in opposite directions. This increases the unit intake area of the outer mixing chamber 212 while ensuring that the two outer ring gases flow in a clockwise or counterclockwise direction after entering the outer mixing chamber 212, facilitating rapid filling of the outer mixing chamber 212. The two outer ejector tubes 23 are arranged in parallel and in opposite directions, and one of the outer ejector tubes 23 is arranged in parallel and in the same direction as the inner ejector tube 22. This reduces the mutual interference between the airflows and is beneficial to improving the primary air coefficient.

[0067] refer to Figure 2-4 and Figure 6 In this embodiment, the external ejector tube 23 includes an air inlet section 231 and a straight tube section 232 that are connected in sequence. The air inlet section 231 constitutes the air inlet end of the external ejector tube 23 and is trumpet-shaped, with its diameter gradually decreasing along the air flow direction. The straight tube section 232 constitutes the air outlet end of the external ejector tube 23, and the air outlet section of the straight tube section 232 extends into the external mixing chamber 212. In addition, the side of the external ejector tube 23 facing the outer ring wall of the external mixing chamber 212 is an inclined surface 233. The inclined surface 233 is arranged obliquely along the circumferential direction of the external mixing chamber 212. Specifically, the inclined surface 233 is arranged obliquely from the inner ring wall 2124 of the external mixing chamber 212 to the outer ring wall of the external mixing chamber 212 and to the air inlet end of the external ejector tube 23. In this way, the distance between the inclined surface 233 and the outer ring wall of the external mixing chamber 212 is increased, thereby making the outlet of the external ejector tube 23 A large distance is left between the outer ring wall of the outer mixing chamber 212, which does not affect the flow of the outer ring gas into the outer mixing chamber 212, while lengthening the length of the outer ejector tube 23; secondly, when the outer ring gas is ejected from the outlet of the outer ejector tube 23, airflows in different directions can be formed, which facilitates part of the outer ring gas to be directly transmitted upward, and the other part of the gas is quickly transmitted along the circumferential direction of the outer mixing chamber 212 under the guidance of the inclined surface 233, so that the outer ring gas quickly fills the entire outer mixing chamber 212.

[0068] refer to Figure 1-6 , the inner mixing chamber 211 is cylindrical. The outer mixing chamber 212 is larger in the middle and arranged at the upper and lower ends. In this embodiment, the outer mixing chamber 212 includes an annular mixing chamber 2121, an outer ring air outlet 2122 and two head mixing grooves 2120. The outer ring air outlet 2122 and the two head mixing grooves 2120 are respectively connected to the upper and lower ends of the annular mixing chamber 2121. The volume of the annular mixing chamber 2121 is larger than the volume of the outer ring air outlet 2122 and the head mixing groove 2120. Specifically, the width of the annular mixing chamber 2121 in the radial direction is larger than the width of the outer ring air outlet 2122 in the radial direction. Of course, the diameter of the outer ring air outlet 2122 can also be designed to gradually decrease from bottom to top. As a result, the premixing resistance of the mixed gas of the outer ring gas and air in the sufficiently large annular mixing chamber 2121 is small and the mixing is sufficient, which is beneficial to reducing the CO content in the flue gas. At the same time, the diameter of the outer ring air outlet 2122 is reduced, which is not only beneficial to improving the heat exchange efficiency between the high-temperature flue gas of the burner and the bottom of the pot, but also avoids the backfire phenomenon caused by the residual gas in the outer mixing chamber 212 due to the large volume of the outer mixing chamber 212.

[0069] Two head mixing grooves 2120 are located on opposite sides of the inner gas mixing chamber 211. These grooves are formed by integrally extending downward from a portion of the bottom of the bottom shell 2101 of the ignition source body 21, forming a downwardly extending convex shape on the bottom of the bottom shell 2101. The head mixing grooves 2120 have inner groove walls 21201 facing the inner gas mixing chamber 211. These inner groove walls 21201 are arranged to slope or curve downward and radially inward from top to bottom. Thus, the provision of the inner groove walls 21201 serves both to increase the volume of the head mixing grooves 2120 and to guide gas. The head mixing trough 2120 also has two side trough walls 21202 arranged opposite to each other. The two side trough walls 21202 are arranged to be inclined from bottom to top and in a direction away from the head mixing trough 2120, and the slopes of the two side trough walls 21202 are different. In this way, the setting of the side trough walls 21202 plays a dual role of increasing the volume of the head mixing trough 2120 and guiding air.

[0070] The inlet end (i.e., the inlet section) of the outer ejector tube 23 is integrally formed and disposed at the bottom of the annular mixing chamber 2121. The outlet end of the outer ejector tube 23 extends transversely through the inner tank wall 21201 and into the head mixing tank 2120. Thus, after the mixture of outer ring gas and air is ejected from the outer ejector tube 23 at a certain speed, it first enters the head mixing tank 2120, which is sufficiently large to facilitate further mixing. The gases then flow into the annular mixing chamber 2121 for further premixing. Furthermore, the upper end of the outlet end of the outer ejector tube 23 (i.e., the upper end of the straight tube section 232) extends upward above one of the side tank walls 21202 of the head mixing tank 2120. Thus, by moving the outer ejector tube 23 upward, the overall height of the bottom shell 2101 of the ignition distributor body 21 is shortened, making the ignition distributor thinner in the vertical direction.

[0071] refer to Figure 6 A downwardly recessed air guide groove 2123 is provided on the bottom surface of the head mixing tank 2120 at a position corresponding to the outlet of the external ejection tube 23. The air guide groove 2123 is respectively connected to the outlet of the external ejection tube 23 and the head mixing tank 2120 to reduce resistance loss through the air guide groove.

[0072] refer to Figure 1-7 To meet the requirements of the core-pulling process and reduce manufacturing costs, the ignition divider body 21 adopts a split design, that is, the ignition divider body 21 includes a bottom shell 2101 and an upper cover 2102. The bottom shell 2101 is integrally formed with an inner gas mixing chamber 211 opening upward and an outer ring chamber (not shown in the figure) opening upward. The outer ring chamber includes two head mixing grooves 2120 and the lower part of the annular mixing chamber 2121. A secondary air inlet 213 is formed between the inner gas mixing chamber 211 and the outer ring chamber. The upper cover 2102 has an annular structure and is detachably mounted on the top of the bottom shell 2101 by screws. The upper cover 2102 covers part or all of the top opening of the outer ring chamber, forming the outer gas mixing chamber 212 between the bottom shell 2101 and the upper cover 2102.

[0073] When the upper cover 2102 covers the radial outer side of the top opening of the outer ring cavity, the radial outer end of the upper cover 2102 is provided with a lower flange 2142 inserted into the outer ring cavity, and the radial inner end of the upper cover 2102 is integrally formed with an upper flange 2141 extending upward, and the upper flange 2141 and the upper end of the outer ring wall 2124 of the outer ring cavity are enclosed to form the outer ring outlet 2122 of the outer mixing cavity 212. Figure 3 When the upper cover 2102 covers the entire top opening of the outer ring cavity, the radial inner end of the upper cover 2102 abuts against the upper end of the outer ring wall 2124 of the outer ring cavity, and the radial outer end is provided with a lower flange 2142 inserted into the outer ring cavity. A plurality of air outlet holes uniformly distributed circumferentially are provided on the upper cover 2102, and all the air outlet holes constitute the outer ring air outlet 2122 of the outer mixing cavity 212.

[0074] refer to Figure 2-3 and Figure 12 Furthermore, a downward-opening positioning ring 25 is provided at the center position of the bottom of the ignition divider body 21. The positioning ring 25 is coaxially arranged with the inner mixing chamber 211 and is used to abut or connect with the current conducting portion 12 on the base assembly 1, so that the ignition divider body 21 forms a reliable contact with the base body 11 on the base assembly 1, while making full use of the bottom space of the ignition divider body, ensuring the conduction performance of the upper air inlet burner during ignition, improving the ignition success rate, and avoiding easy flameout due to poor contact.

[0075] refer to Figure 5-6 Furthermore, an overflow prevention portion 26 is provided on the outer circumferential wall of the inner mixing chamber 211, extending toward the secondary air inlet 213. The overflow prevention portion 26 is umbrella-shaped and is used to direct overflow liquid along the overflow prevention portion 26 to the liquid receiving pan of the upper air inlet burner, thereby preventing the liquid from flowing into the ejector of the ignition distributor 2 and affecting combustion. In addition, a positioning notch 261 is provided radially outwardly of the overflow prevention portion 26. The positioning notch 261 is configured to cooperate with the ignition assembly 4, as shown in FIG. Figure 11 In this way, the ignition assembly 4 is positioned by the positioning notch 261, which can, on the one hand, limit the ignition assembly 4 and improve the reliability of the installation of the ignition assembly 4, and on the other hand, prevent the ignition distributor 2 from rotating during use and affecting normal combustion.

[0076] Furthermore, a plurality of connecting ribs 262 extending outward and arranged at intervals in the circumferential direction are integrally formed on the radial outer side of the overflow prevention portion 26. The connecting ribs 262 span the secondary air inlet 213 and the radial outer ends thereof are fixedly connected to the lower end of the inner annular wall 2124 of the outer air mixing chamber 212. In this way, through the provision of the overflow prevention portion 26 and the connecting ribs 262, the inner air mixing chamber 211 and the outer air mixing chamber 212 are connected to form a whole.

[0077] In this embodiment, there are two connecting ribs 262, which divide the secondary air inlet 213 into two parts. By reducing the number of connecting ribs 262 and their width in the circumferential direction, the area of the secondary air inlet is increased. The connecting ribs 262 are arranged from the inside out and tilted or curved downward. One of the connecting ribs 262 is provided with a positioning hole 263, which is configured to be compatible with the positioning post 141 on the base assembly 1. It can be seen that by designing the connecting ribs 262 to tilt or curve from the inside out and downward, the overflowing liquid is drained downward and the height of the positioning hole 263 is reduced, which helps to shorten the vertical height of the positioning post 141 that cooperates with the positioning hole 263, saving material for the positioning post 141 and reducing costs.

[0078] Example 2

[0079] refer to Figure 10-14 , this embodiment provides an upper air inlet burner, comprising a base assembly 1, an ignition divider as described in Example 1, a fire cover assembly (not shown in the figure) and an ignition assembly 4. The base assembly 1 is arranged at the bottom of the ignition divider 2, and a gap (not shown in the figure) for secondary air to pass through is formed between the bottom of the ignition divider 2 and the top of the base assembly 1. The gap is connected to the secondary air inlet 213 on the ignition divider 2 to form a secondary air supply channel. In this embodiment, the base assembly 1 has an inner ring air duct and an outer ring air duct. The inner ring air duct is connected to the air inlet end of the inner ejector tube 22, and the outer ring air duct is connected to the air inlet end of the outer ejector tube 23. The fire cover assembly is arranged at the top of the ignition divider 2 and comprises an inner fire cover 31 and an outer fire cover 32. The inner fire cover 31 covers the top opening of the inner mixing chamber 211, and the outer fire cover 32 covers the top opening of the outer mixing chamber 212. The ignition assembly 4 is vertically disposed through the secondary air inlet 213 of the ignition distributor, and the lower end thereof is matched and connected with the mounting seat 13 of the base assembly 1 .

[0080] refer to Figure 12-14 The base assembly 1 includes a base body 11 and a current conducting portion 12. The current conducting portion 12 is integrally formed and arranged at the center position of the top of the base body 11, and extends upward. The current conducting portion 12 is abutted or connected to the positioning ring 25 on the ignition divider. It can be seen that the setting of the current conducting portion 12, on the one hand, enables the base body 11 to be reliably connected or contacted with the ignition divider 2 through the current conducting portion 12, ensuring that the burner has stable and reliable conduction performance, and on the other hand, it can position and limit the installation of the ignition divider 2, ensure the concentricity of the ignition divider 2 after being installed on the base assembly 1, and prevent the ignition divider 2 from radial displacement.

[0081] Furthermore, in order to prevent the base body 11 from being easily corroded, a high-temperature resistant protective layer (not shown in the figure) is provided on the outer surface of the base body 11 and is located outside the current conducting part 12; there is no high-temperature resistant protective layer on the surface of the current conducting part 12, which has an annular structure and is plugged into and matched with the positioning ring 25 on the ignition distributor 2 to form reliable contact to ensure the conductive performance.

[0082] The top of the base body 11 is provided with an upwardly extending inner ring air outlet seat 111 and two outer ring air outlet seats 112. The two outer ring air outlet seats 112 are respectively arranged on opposite sides of the top of the base body 11 and are arranged diagonally. Each outer ring air outlet seat 112 is mounted with an outer ring nozzle 152. The air discharge direction of the outer ring nozzle 152 is toward the inlet of the outer ejection tube 2 on the ignition distributor 1. The outer ring air channel is formed by the outer ring air outlet seat 112 and the outer ring nozzles 152. Therefore, by increasing the distance between the two outer ring nozzles 152, the mutual interference caused by the high-speed airflow from the outer ring nozzles 152 when ejecting the primary air can be reduced, thereby avoiding affecting combustion performance. Furthermore, an upward-extending positioning protrusion 142 is integrally formed on the top of the two outer ring air outlet seats 112. The positioning protrusion 142 is used to cooperate with the ignition distributor body 21. The line connecting the central axes of the two positioning protrusions 142 coincides with the central axis of the base body 11, so that the distance between the two outer ring air outlet seats 112 is maximized.

[0083] An inner ring air outlet seat 111 is disposed at the top of the base body 11 and is located on the same side as one of the outer ring air outlet seats 112. An inner ring nozzle 151 is mounted on the inner ring air outlet seat 111, with the air outlet direction of the inner ring nozzle 151 directed toward the inlet of the inner ejector tube 22 on the igniter 1. The inner ring air passage is formed by the inner ring air outlet seat 111 and the inner ring nozzle 151. Thus, compared to the inner ring nozzle being mounted vertically upward at the center of the top of the base body, the inner ring nozzle 151 is mounted at one end of the top of the base body 11 via the inner ring air outlet seat 111, effectively preventing the inner ring nozzle 151 from becoming easily clogged. Furthermore, the center of the top of the base body 11 is reserved for the arrangement of the current conducting portion 12, enabling reliable contact between the current conducting portion 12 and the igniter.

[0084] In this embodiment, the length of the top of the base body 11 in the front-to-back direction is greater than the width L of the top of the base body 11 in the left-to-right direction, and the distance L1 between the inner ring air outlet seat 111 and the outer ring air outlet seat 112 arranged adjacent to it is not less than 3 / 10 of the width L of the top of the base body. Preferably, L1 = (0.4-0.7) × L. In this way, the distance between the inner ring nozzle 151 and the adjacent outer ring nozzle 152 is increased to prevent airflow interference from affecting combustion performance.

[0085] refer to Figure 14Furthermore, in order to further increase the distance between adjacent nozzles, a flange 113 extending outward is integrally formed at the position of the base body 11 corresponding to the outer ring air outlet seat 112, that is, a flange 113 extending rightward is provided on the right side of the front end of the base body 11, and a flange 113 extending leftward is provided on the left end of the rear end of the base body 11. Parts of the two outer ring air outlet seats 112 are fixed on the top of the flange 113, and the inner ring air outlet seat 111 is placed on the top of the rear end of the base body 11. Therefore, by providing the flange 113, the outer ring air outlet seat 112 can be moved outward toward the flange 113 while saving material, thereby increasing the distance between the inner ring air outlet seat 111 and the outer ring air outlet seat 112 at the rear end as much as possible, avoiding airflow interference between the inner ring nozzle 151 and the outer ring nozzle 152 at the rear end.

[0086] refer to Figure 11-14 The base assembly 1 also includes a mounting seat 13. An upwardly extending mounting seat 13 is integrally formed on the top of the base body 11. The mounting seat 13 is located outside the current conducting portion 12 and is used to secure and support the ignition assembly 4. The surface of the mounting seat 13 may or may not have a high-temperature resistant protective layer. The lower end of the ignition assembly 4 is inserted into the mounting seat 13 and the upper end vertically passes through the positioning notch 261 on the igniter. In this way, the mounting seat 13 and the positioning notch 261 cooperate to achieve vertical positioning of the ignition assembly 14, improving the stability and reliability of the ignition assembly 4. At the same time, it can prevent the ignition divider 2 from rotating during use and affecting normal combustion.

[0087] refer to Figure 12-14 A positioning post 141 extending upward is integrally formed on the top of the base body 11. The positioning post 141 is located outside the current conducting portion 12. The horizontal cross-section of the positioning post 141 is polygonal or elliptical, and is used to cooperate with the positioning hole 263 on the ignition divider 2 to prevent the ignition divider 2 from tipping over and rotating relative to the base body 11. It should be noted that the positioning post 141 can be configured to have an interference fit with the positioning hole 263 of the ignition divider. In this way, the positioning post 141 and the hole wall of the positioning hole 263 of the ignition divider 2 can form a reliable contact, that is, form another flame induction circuit, which is beneficial to further ensure the conduction performance of the upper air inlet burner during ignition, improve the ignition success rate, and avoid easy flameout due to poor contact.

[0088] To facilitate quick assembly and disassembly of the positioning post 141 and the positioning hole 263 of the ignition dispenser 2, a guide surface 1411 is provided on at least one outer sidewall of the positioning post 141. The guide surface 1411 is inclined or curved from bottom to top and toward the interior of the positioning post 141, thereby gradually decreasing the diameter of the positioning post 141 from bottom to top. In this embodiment, the side of the positioning post 141 facing the current conducting portion 12 and the side facing away from the current conducting portion 12 are designed as guide surfaces. Furthermore, the top edge of the positioning post 141 is chamfered or curved to provide guidance while preventing scratches on the user.

[0089] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A fire dispenser, characterized in that: include: The ignition device body (21) comprises an inner air mixing chamber (211) opening upward and an outer air mixing chamber (212) opening upward, wherein the outer air mixing chamber (212) is located outside the inner air mixing chamber (211), a mounting opening (2111) communicating with the inner air mixing chamber (211) is provided at the lower end of the outer side wall of the inner air mixing chamber (211), and a secondary air inlet (213) is formed between the inner air mixing chamber (211) and the outer air mixing chamber (212); an inner ejector tube (22) which is transversely disposed through the mounting opening (2111) and is detachably connected to the ignition distributor body (21); the inner ejector tube (22) includes a diffuser section (223); a portion or all of the diffuser section (223) is transversely disposed through the mounting opening (2111) and extends into the inner gas mixing chamber (211); the inner gas mixing chamber (211) is in communication with the diffuser section (223); and An external ejector tube (23) is integrally formed and arranged at the bottom of the ignition distributor body (21) and is located radially outside the secondary air inlet (213); an air outlet end of the external ejector tube (23) is connected to the external mixing chamber (212); The outer gas mixing chamber (212) includes an annular mixing chamber (2121), an outer ring air outlet (2122) and two head mixing grooves (2120), wherein the outer ring air outlet (2122) and the two head mixing grooves (2120) are respectively connected to the upper and lower ends of the annular mixing chamber (2121), and the two head mixing grooves (2120) are arranged on two opposite outer sides of the inner gas mixing chamber (211), and the head mixing grooves (2120) are formed by a partial integral downward extension of the bottom of the ignition divider body (21), and the head mixing grooves (2120) have an inner groove wall (21201) facing the inner gas mixing chamber (211), and the gas outlet end of the outer ejector tube (23) passes through the inner groove wall (21201) transversely and extends into the head mixing grooves (2120); The inner groove wall (21201) is arranged to be inclined or curved from top to bottom and radially inward; the head mixing groove (2120) further comprises two side groove walls (21202) arranged opposite to each other, both of the side groove walls (21202) are arranged to be inclined from bottom to top and in a direction away from the head mixing groove (2120), and the slopes of the two side groove walls (21202) are different; The inner ejector tube (22) further comprises an intake section (221) and a mixing section (222); the diffuser section (223) is connected to the intake section (221) via the mixing section (222); a limiting flange (224) extending outward is provided on the circumference of the outer side wall of the diffuser section (223) or the mixing section (222); the limiting flange (224) is sealed and connected to the edge of the mounting port (2111).

2. A fire distributor according to claim 1, characterized in that: A small plane (225) is provided at the bottom of the diffuser section (223), and the small plane (225) is flush with and abuts against the bottom surface of the installation opening (2111) and the bottom surface of the inner mixing chamber (211), respectively.

3. A fire distributor according to any one of claims 1-2, characterized in that: The length of the expansion section (223) extending into the inner mixing chamber (211) is equal to the diameter of the inner mixing chamber (211).

4. A fire distributor according to any one of claims 1-2, characterized in that: The inner ejector tube (22) is made of aluminum alloy.

5. The ignition distributor according to claim 1, characterized in that: There are two outer ejection tubes (23), which are respectively arranged in parallel on two opposite outer sides of the inner ejection tube and located below the bottom of the inner gas mixing chamber (211). At least one outer ejection tube (23) is arranged opposite to the inner ejection tube (22), and the gas outlet end of the outer ejection tube (23) extends into the outer gas mixing chamber (212).

6. The ignition distributor according to claim 1, characterized in that: A downwardly recessed air guide groove (2123) is provided on the bottom surface of the head mixing groove (2120) at a position corresponding to the outlet of the external ejection tube (23), and the air guide groove (2123) is respectively connected to the outlet of the external ejection tube (23) and the head mixing groove (2120).

7. The ignition distributor according to claim 1, characterized in that: The width of the annular mixing chamber (2121) in the radial direction is greater than the width of the outer ring air outlet (2122) in the radial direction; and / or the diameter of the outer ring air outlet (2122) gradually decreases from bottom to top.

8. The ignition distributor according to claim 1, characterized in that: The external ejector tube (23) includes an air inlet section (231) and a straight pipe section (232), wherein the straight pipe section (232) transversely penetrates the inner tank wall (21201) and extends into the head mixing tank (2120), and the upper end of the straight pipe section (232) is located above one of the side tank walls (21202) of the head mixing tank (2120).

9. A fire distributor according to any one of claims 1 or 5-8, characterized in that: A side of the outer ejector tube (23) facing the outer annular wall of the outer gas mixing chamber (212) is an inclined surface (233), and the inclined surface (233) is arranged obliquely along the circumferential direction of the outer gas mixing chamber (212).

10. The ignition distributor according to claim 1, characterized in that: A positioning ring (25) with a downward opening is provided at the bottom of the fire distributor body (21), and the positioning ring (25) is coaxially arranged with the inner gas mixing chamber (211).

11. The ignition distributor according to claim 1, characterized in that: An overflow prevention portion (26) extending in the direction of the secondary air inlet (213) is provided on the circumference of the outer side wall of the inner mixing chamber (211).

12. The ignition distributor according to claim 11, characterized in that: The overflow prevention portion (26) is umbrella-shaped, and / or a positioning notch (261) is provided on the radially outer side of the overflow prevention portion (26).

13. The ignition distributor according to claim 11, characterized in that: A plurality of outwardly extending connecting ribs (262) are circumferentially spaced apart at the radial outer end of the overflow prevention portion (26). The connecting ribs (262) span the secondary air inlet (213) and have radial outer ends fixedly connected to the inner annular wall of the outer mixing chamber (212).

14. The ignition distributor according to claim 13, characterized in that: The connecting ribs (262) are arranged from the inside out and tilted or curved downward; and / or at least one of the connecting ribs (262) is provided with a positioning hole (263).

15. A fire distributor according to any one of claims 1 or 5-8 or 10-13, characterized in that: The fire distributor body (21) includes a bottom shell (2101) and an upper cover (2102), wherein the bottom shell (2101) has an inner gas mixing chamber (211) opening upward and an outer ring chamber opening upward, and the upper cover (2102) is arranged on the top of the bottom shell (2101) and covers part or all of the top opening of the outer ring chamber, and the outer gas mixing chamber (212) is formed between the bottom shell (2101) and the upper cover (2102).

16. An upward air inlet burner, characterized in that: include: A fire distributor according to any one of claims 1 to 15; A base assembly (1) is arranged at the bottom of the ignition distributor and has an inner ring air passage and an outer ring air passage, wherein the inner ring air passage is connected to the air inlet end of the inner ejection tube (22), and the outer ring air passage is connected to the air inlet end of the outer ejection tube (23); a fire cover assembly, arranged on the top of the fire distributor and covering the top opening of the inner gas mixing chamber (211) and the top opening of the outer gas mixing chamber (212) respectively; as well as An ignition assembly (4) is vertically arranged through the secondary air inlet (213) of the ignition distributor, and its lower end is connected to the base assembly (1).

17. The upward air inlet burner according to claim 16, characterized in that: The base assembly (1) is fixedly provided with a current conducting portion (12) extending upward at a position corresponding to the inner gas mixing chamber (211), and the current conducting portion (12) abuts or connects with a positioning ring (25) on the ignition distributor, so that the current conducting portion (12) and the positioning ring (25) form reliable contact.

18. The upward air inlet burner according to claim 16, characterized in that: The base assembly (1) is fixed with a positioning column (141) extending upward, and the positioning column (141) is matched and plugged into a positioning hole (263) on the ignition distributor.

19. The upward air inlet burner according to claim 16, characterized in that: A mounting seat (13) for supporting the ignition assembly (4) is fixedly provided on the base assembly (1); the lower end of the ignition assembly (4) is inserted into the mounting seat (13), and the upper end vertically passes through the positioning notch (261) on the ignition distributor.

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