Combustor

Abstract

The invention provides a burner which comprises a fixing support, an adjusting piece, an air door plate, an injection pipe, a fire distributor and an outer ring fire cover, the adjusting piece, the air door plate, the injection pipe, the fire distributor and the outer ring fire cover are sequentially connected in the gas flowing direction, and the air door plate comprises a bottom plate structure and an annular flanging structure surrounding the bottom plate structure by a circle. The annular flanging structure protrudes in the direction of installing the injection pipe relative to the bottom plate structure, an injection pipe installation position is formed in the flanging structure, the injection pipe is installed in the injection pipe installation position, and the annular flanging structure of the air door plate surrounds the air inlet end of the injection pipe by a circle; the air door plate is provided with a turnup part which is turned up towards the adjusting piece at the air inlet, the turnup part is turned over towards the peripheral side from the air inlet, and the adjusting piece is limited in a limiting space formed by the turnup part. According to the combustor provided by the invention, the air tightness inspection difficulty of the injection pipe can be well reduced, and the air tightness inspection efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of burners, and in particular to a burner. Background Art

[0002] The burner is an important part of the gas stove, which determines the performance of the gas stove. The gas stove generally includes: a panel, a bottom shell and a burner; the panel is fixedly arranged on the top of the bottom shell, and a pot holder for supporting the pot is arranged on the panel; the panel and the bottom shell together form a cavity, and the bottom of the burner head of the burner extends into the cavity and is fixedly connected to the bottom shell; the burner includes a burner head for mixing gas and primary air, and the burner head has an ejector pipe connected to the gas supply device, and the ejector pipe is mainly used to mix the gas provided by the gas supply device with the primary air.

[0003] The outer ring fire cover is one of the parts of the gas stove, which is used to transmit gas to the circumferential side wall of the outer ring fire cover. When ignited, an annular fire ring is formed on the circumference of the outer ring fire cover. In the related art, the fire cover of the gas stove includes an outer ring fire cover and an inner ring fire cover. A pulse igniter is provided between the outer ring fire cover and the inner ring fire cover. The pulse igniter is used to ignite the inner ring fire cover. The outer ring fire cover is provided with an ignition groove. One side of the ignition groove is opened toward the inner ring fire cover, so that when the gas fills the outer ring fire cover and overflows from the ignition groove, the open flame on the inner ring fire cover can be ignited by the gas overflowing from the ignition groove, and the flame gradually spreads to the outer ring fire cover until the gas ejected from the outer wall of the outer ring fire cover is ignited, and an annular fire wall is formed. The ejector tube needs to be expanded, contracted, bent and other processes during the production process, and there is an inevitable risk of tearing. During the combustion process, the ejector tube will leak, which will cause serious accidents. Therefore, we need to check the air tightness of the ejector tube during the production process. However, existing burners still have air leaks during the seal inspection, which greatly increases the difficulty of air tightness testing of the ejector tube. It is impossible to correctly determine whether the ejector tube is leaking, resulting in an increase in the ejector tube scrap rate and cost. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a burner.

[0005] The technical solution used in the present invention is: to provide a burner, including a fixed bracket, an adjusting plate, an air damper plate, an ejector tube, a flame divider and an outer ring fire cover, wherein the adjusting plate, the air damper plate, the ejector tube, the flame divider and the outer ring fire cover are connected and arranged in sequence along the gas flow direction, the air damper plate includes a base plate structure and an annular flange structure surrounding the base plate structure, the annular flange structure protrudes relative to the base plate structure toward the direction of installing the ejector tube, an ejector tube mounting position is formed in the flange structure, the ejector tube is installed in the ejector tube mounting position, so that the annular flange structure of the air damper plate surrounds the air inlet end of the ejector tube; the air damper plate has a flange portion flipped up toward the adjusting plate at the air inlet, and the flange portion is folded from the air inlet to the outer peripheral side, and the adjusting plate is limited to the limiting space formed by the flange portion.

[0006] Preferably, the flange portion includes a first flange and a second flange connected to each other, the first flange is turned up from the bottom plate toward the adjustment sheet, the first flange surrounds the air inlet, the second flange is folded toward the outer peripheral side relative to the first flange, the bottom plate, the first flange and the second flange are connected in sequence and form the limiting space therebetween;

[0007] The first flange is perpendicular to the bottom plate, and the second flange is perpendicular to the first flange;

[0008] Preferably, the annular flange structure of the damper plate and the ejector tube are fully welded by a brazing process.

[0009] Preferably, the ejector tube comprises an ejector tube body and a sleeve in sequence along the gas flow direction, the end of the sleeve is used to connect the ignition divider, the sleeve is fixed on the fixed bracket, and protrudes toward the ignition divider relative to the fixed bracket, and the wall thickness of the sleeve is greater than the wall thickness of the ejector tube body; a sleeve mounting position for mounting the sleeve is provided on the ignition divider, the end of the sleeve is installed in the sleeve mounting position, and the sleeve mounting position has an end face matching portion, and the end face of the sleeve is matched and sealed with the end face of the end face matching portion.

[0010] Preferably, the length of the sleeve extending outward relative to the fixed bracket is 3mm-8mm; the wall thickness of the sleeve is 1.5 to 3 times the wall thickness of the ejector tube body, and the wall thickness of the sleeve is 1mm to 3mm.

[0011] Preferably, the sleeve installation position has a mounting portion extending toward the ejector tube body, the mounting portion surrounds the sleeve installation position, the end surface matching portion protrudes toward the inside of the installation position, and the sleeve end is inserted into the sleeve installation position;

[0012] The fixed bracket has a flange mounting structure that is turned out toward the direction of the ejector tube body at the place where the sleeve is installed, the head end of the sleeve is inserted into the flange hole formed by the flange structure, and the ejector tube body has a flared section at the tail end. After the head end of the sleeve is inserted into the flange hole, it passes through the flange hole and extends into the flared section of the ejector tube body to be connected with the ejector tube body; the lower end face of the flange mounting structure is cooperatively connected with the upper end face of the flared section, and the lower end face of the flange mounting structure is welded to the upper end face of the flared section.

[0013] Preferably, the ignition divider includes an outer ring wall, an inner ring wall, and a bottom wall, the outer ring wall and the inner ring wall are connected to the two sides of the bottom wall respectively, the ignition divider also includes an outer ring gas intake structure and an inner ring gas intake structure, the inner ring gas intake structure is located in the space surrounded by the inner ring wall, a gas flow channel is formed between the outer ring wall and the inner ring wall, the outer ring gas intake structure has an outer ring gas channel that passes through the bottom wall, the outer ring gas channel is connected to the gas flow channel, the diameter of the outer ring gas channel is D1, the width of the gas flow channel is D2, and D1>D2.

[0014] Preferably, the outer ring gas intake structure has a first wall body and a second wall body on both sides of the outer ring gas channel, the first arm body is connected to the outer ring wall and has a first arc groove, and protrudes outward relative to the outer side of the outer ring wall, the second wall body is connected to the inner ring wall and has a second arc groove, and protrudes inward relative to the inner ring wall, the first wall arc groove and the second wall arc groove constitute a part of the outer ring gas channel.

[0015] Preferably, a plurality of main fire holes are arranged at intervals on the circumferential direction of the outer side of the outer wall of the fire cover body of the outer ring fire cover, the outer side surface of the fire cover body has a flame stabilizing groove with an opening facing outward and extending circumferentially, the flame stabilizing groove is located below the main fire hole, and a plurality of lower flame stabilizing holes are arranged at intervals on the circumferential direction of the inner side of the outer wall of the fire cover body, the lower flame stabilizing holes are connected with the flame stabilizing groove, and the flame stabilizing groove is connected with the main fire hole;

[0016] A plurality of upper flame stabilizing holes are also arranged at intervals on the circumferential direction of the outer side of the outer wall of the fire cover body, and some adjacent upper flame stabilizing holes are separated from each other by the main fire hole, and the aperture of the upper flame stabilizing hole is smaller than the aperture of the main fire hole;

[0017] The outer ring fire cover is provided with a plurality of 4-9 secondary fire holes at the outlet of the outer ejection tube, and the aperture of the secondary fire hole is smaller than the aperture of the main fire hole.

[0018] Preferably, the fixed bracket comprises a bracket body, a bottom shell mounting plate, a mounting plate and a fixed plate, the bracket body is provided with an ejector tube mounting position for mounting the ejector tube, the bottom shell mounting plate is bent relative to the bracket body and extends downward, the mounting plate extends downward relative to the bracket body, the fixing plate is detachably connected to the mounting plate, and when the fixing plate and the mounting plate are fixed, an installation space is formed between the fixing plate and the mounting plate;

[0019] The mounting plate is formed by bending a portion of the bracket body downward, and the mounting plate has a first mounting groove with a side opening. When the mounting plate and the fixing plate are fixed, the opening of the first mounting groove is closed by the fixing plate to form a mounting space;

[0020] The fixing plate has a second mounting groove with a side opening, and when the mounting plate and the fixing plate are fixed, the openings of the first mounting groove and the second mounting groove are opposite to each other, and the first mounting groove and the second mounting groove constitute the mounting space;

[0021] One end of the fixing plate has a bent plug, and one end of the mounting plate has an opening, the thickness of the bent plug in a natural state is L1, the width of the opening is L2, L1>L2, the bent plug can be confined in the opening in a natural state, and the thickness of the bent plug can be compressed under the action of an external force, so that the bent plug can be inserted into or pulled out of the opening;

[0022] The other end of the fixing plate has a first screw hole, and the other end of the mounting plate has a second screw hole. The mounting plate and the fixing plate are detachably fixed by bolts passing through the first screw hole and the second screw hole.

[0023] The burner provided by the present invention can effectively reduce the difficulty of air tightness inspection of the ejector tube, greatly improve the efficiency of air tightness inspection, and provide better guarantee for the production and preparation of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0025] Figure 1 This is a schematic diagram of the burner structure provided by the present invention.

[0026] Figure 2 This is a schematic diagram of the ejector tube structure provided by the present invention.

[0027] Figure 3This is a schematic diagram of the structure of the damper plate provided by the present invention.

[0028] Figure 4 This is a schematic diagram of the connection structure between the damper plate and the ejector tube provided by the present invention.

[0029] Figure 5 This is a schematic diagram of the connection structure between the adjustment piece and the damper plate provided by the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the regulating piece provided by the present invention.

[0031] Figure 7 This is a schematic cross-sectional structure diagram of the connection between the adjustment piece and the damper plate provided by the present invention.

[0032] Figure 8 This is a schematic diagram of the structure of the fire distributor provided by the present invention.

[0033] Fig. 9 The present invention provides a schematic diagram of the cross-sectional structure of the fire distributor.

[0034] Fig.10 This is a schematic diagram of the connection structure between the ejector tube and other components provided by the present invention.

[0035] Fig.11 This is a schematic diagram of the outer ring fire cover structure provided by the present invention.

[0036] Fig.12 This is a schematic diagram of the cross-sectional structure of the outer ring fire cover provided by the present invention.

[0037] Fig.13 This is a schematic diagram of the structure of the fixed bracket fixing the ignition needle and the thermocouple provided by the present invention.

[0038] Fig.14 This is a schematic diagram of the fixing bracket structure provided by the present invention.

[0039] Fig.15 This is a schematic diagram of the first angle structure of the fixing plate provided by the present invention.

[0040] Fig.16 This is a schematic diagram of the second angle structure of the fixing part provided by the present invention.

[0041] Fig.17 A schematic diagram of the structure of another fire distributor provided by the present invention.

[0042] Fig.18 for Fig.17 The cross-section result of the ignition divider is shown. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments cited are not intended to limit the present invention. In the present embodiment, it should be understood that the orientations or positional relationships indicated by terms such as "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0044] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used in the present invention are for illustrative purposes only.

[0045] Please refer to Figure 1-18 The present invention provides a burner, comprising a fixing bracket 50, an adjusting plate 60, a damper plate 10, an ejector tube 20, a flame distributor 40 and an outer ring fire cover 90. The adjusting plate 60, the damper plate 10, the ejector tube 20, the flame distributor 40 and the outer ring fire cover 90 are sequentially connected and arranged along the gas flow direction.

[0046] refer to Figure 2 The ejector tube 20 has two pieces, namely, an outer ejector tube 20a and an inner ejector tube 20b, both of which are fixed on a fixed bracket 50. The ejector tube 20 includes an ejector tube body 201 and a sleeve 202 in sequence along the gas flow direction, and the sleeve 202 protrudes toward the igniter 40 relative to the fixed bracket 50. The wall thickness of the sleeve 202 is greater than the wall thickness of the ejector tube body 201. The ejector tube 20 provided by the present invention is divided into an ejector tube body 201 and a sleeve 202. The wall thickness of the ejector tube body 201 can be made relatively thin, and the cost can be maintained at a relatively low level to ensure better processing and molding. The wall thickness of the end face of the sleeve 202 is relatively thick. The relatively thick wall thickness allows the sleeve 202 and the igniter 40 to be sealed through the end face, which better ensures that the sleeve 202 and the igniter 40 are not easy to leak.

[0047] refer to Figure 3-5The damper plate 10 includes a bottom plate structure 101 and an annular flange structure 102 that surrounds the bottom plate structure 101. The annular flange structure 102 protrudes relative to the bottom plate structure 101 toward the direction of installing the ejector tube 20. An ejector tube installation position is formed in the flange structure 102. The ejector tube 20 is installed in the ejector tube installation position, so that the annular flange structure 102 of the damper plate surrounds the air inlet end of the ejector tube 20. The damper plate 10 has a flange portion 103 that is turned up toward the regulating sheet 60 at the air inlet 601, and the flange portion 103 is folded from the air inlet 602 to the outer peripheral side, and the regulating sheet 60 is limited in the limited space formed by the flange portion 103.

[0048] The annular flange structure 102 is provided so that it can be in 360° contact with the entrance of the ejector tube 20, ensuring a 360° close fit between the damper plate 10 and the entrance of the ejector tube 20 without a gap. The close fit between the damper plate and the entrance of the ejector tube is ensured without a gap, solving the problem of air tightness detection. Compared with the existing structure, this damper plate structure is easy to weld, greatly improving production efficiency, and this damper plate structure can be fully welded by brazing process, further reducing the gap between the damper plate and the ejector tube, which can reduce the difficulty of air tightness inspection of the ejector tube.

[0049] By providing the flange portion 103, this outer flange structure of the damper plate can ensure that when the burner base is subjected to an air tightness test, there will be no gap between the adjustment piece 60 and the damper plate 10, and there will be no air leakage from the contact surface gap between the damper plate and the adjustment piece, thereby improving the accuracy of the air tightness test.

[0050] The burner provided by the present invention can effectively avoid air leakage at the connection between the damper plate 10 and the ejector tube 20 by means of the annular flange structure 102. The outer flange structure of the damper plate 10 at the air inlet can avoid air leakage at the contact surface between the adjustment plate 60 and the damper plate 10. The burner provided by the present invention can effectively reduce the difficulty of air tightness inspection of the ejector tube and greatly improve the efficiency of air tightness inspection.

[0051] refer to Figure 5 In a preferred embodiment, the damper plate 10 and the adjusting piece 60 constitute a damper adjusting device, which has an air inlet 601 and an air regulating port 602 penetrating the damper plate 10 and the adjusting piece 20. The adjusting piece 60 can rotate relative to the damper plate 10. The adjusting piece 60 has a shielding portion 601. When the adjusting piece 60 rotates relative to the damper plate 10, the shielding portion 601 can make the air regulating port 602 larger or smaller. One side of the damper plate 10 is connected to the ejector tube 20, and the other side is connected to the adjusting piece 60.

[0052] refer to Figure 3 , Figure 5-6In a preferred embodiment, a plurality of adjustment holes 1013 are provided on the damper plate 10, and a positioning convex bump 602 is provided on the shielding portion 601 of the adjustment sheet 60. The positioning convex bump 602 cooperates with the adjustment hole 1013. When the adjustment sheet 60 rotates relative to the damper plate 10, the positioning convex bump 602 can be inserted into one of the plurality of adjustment holes 1013. When the burner is working, primary air will enter the ejector tube 20 from the air regulating port 602. There is a matching opening 603 on the regulating plate 60. When the regulating plate 60 is at zero position, the air inlet 1012 of the damper tube 10 and the matching opening 603 coincide with each other. At this time, the area of ​​the air regulating port 602 is the largest, the cross-sectional area from the air regulating port to the ejector is the largest, and the ejection performance is the best. When the regulating plate 60 rotates, the air inlet 1012 of the damper tube 10 and the matching opening 603 on the regulating plate 60 slowly become offset, and the shielding portion 601 partially shields the air inlet 1012 of the damper tube 10, making the area 602 of the air regulating port 603 smaller. At this time, the cross-sectional area of ​​the primary air entering the ejector tube slowly decreases, and the ejection performance gradually decreases. When the flame appears to be flame-lifting, the adjusting plate 60 can be rotated to reduce the cross-sectional area of ​​the primary induced air inlet, thereby reducing the induced air capacity of the burner and solving the flame-lifting problem. When the flame appears to be yellow, the adjusting plate 60 can be rotated to increase the cross-sectional area of ​​the primary induced air inlet, thereby increasing the induced air capacity of the burner and solving the yellow flame problem.

[0053] refer to Figure 7 In a preferred embodiment, the flange portion 103 includes a first flange 1031 and a second flange 1032 connected to each other. The first flange 1031 is turned up from the bottom plate 1033 toward the direction of the adjustment piece 60. The first flange 1031 surrounds the air inlet 601. The second flange 1032 is folded toward the outer peripheral side relative to the first flange 1031. The bottom plate 1033, the first flange 1031 and the second flange 1032 are connected in sequence, and a limiting space for fixing the adjustment piece 60 is formed therebetween. This structure can ensure that there is no air leakage.

[0054] refer to Figure 7 In a preferred embodiment, the first flange 1031 is perpendicular to the bottom plate 1033, and the second flange 1032 is perpendicular to the first flange 1031. The verticality referred to in the present invention allows an error of plus or minus 5 degrees.

[0055] refer to Figure 3-4 In a preferred embodiment, the annular flange structure 102 of the damper plate 10 and the ejector tube 20 are fully welded by a brazing process, and a welding structure is formed at the connection between the two, and the welding structure surrounds the ejector tube. The gap between the damper plate and the ejector tube is further reduced, which can reduce the difficulty of the airtightness inspection of the ejector tube.

[0056] refer to Figure 1-2 and Fig.10In a preferred embodiment, the ejector tube includes an ejector tube body 201 and a sleeve 202 in sequence along the gas flow direction. The end of the sleeve 202 is used to connect the ignition divider 40. The sleeve 202 is fixed on the fixed bracket 50 and protrudes toward the ignition divider 40 relative to the fixed bracket 50. The wall thickness of the sleeve 202 is greater than the wall thickness of the ejector tube body 201.

[0057] The ejector tube assembly provided by the present invention divides the ejector tube into an ejector tube body 201 and a sleeve 202. The wall thickness of the ejector tube body 201 can be made relatively thin, and the cost can be kept relatively low to ensure good processing and forming. At the same time, the present invention is also equipped with a sleeve 202 with a relatively thick wall thickness. Because the wall thickness of the end face of the sleeve 202 is relatively thick, the sleeve 202 and the ignition divider 40 can be sealed through the end face, and it is better to ensure that the sleeve 202 and the ignition divider 40 are not easy to leak. At the same time, because the present invention adopts a sleeve 202 with a relatively thick wall thickness, the length of the sleeve 202 extending out of the fixed bracket 50 can be shortened, and the problem of the difficulty in taking and placing the ignition divider can be solved, and if the ignition divider is not put in place, it is avoided that a fire leak will occur and cause a safety accident.

[0058] refer to Figure 8-10 In a preferred embodiment, the ignition distributor 40 is provided with a sleeve installation position for installing the sleeve 202, that is, the sleeve 202 of the outer ejector tube can be installed at the outer ring gas channel 851, and the sleeve 202 of the inner ejector tube can be installed at the inner ring gas channel 841. The end of the sleeve 202 is installed in the sleeve installation position. The sleeve installation position has an end surface matching portion 41, and the end surface of the sleeve 202 is tightly matched with the end surface matching portion 41. Fig. 9 The schematic diagram of the connection structure of the outer ejector tube is shown, and the inner ejector tube and the ignition distributor 40 also adopt end face matching sealing. The present invention uses a relatively thick sleeve 202 wall thickness to enable the sleeve 202 and the ignition distributor 40 to achieve better end face matching sealing, have a better sealing effect, and avoid gas leakage.

[0059] refer to Fig.10 In a preferred embodiment, the sleeve installation position has a mounting portion 42 extending toward the ejector tube body, the mounting portion 42 surrounds the sleeve installation position, the end surface matching portion 41 protrudes toward the inside of the installation position, the end of the sleeve 202 is inserted into the sleeve installation position, and the end surface is tightly matched with the end surface matching portion 41. This structure can achieve better installation and positioning of the sleeve 202 on the one hand, and can better seal through the end surface matching, so that the installation and sealing of the ejector tube and the ignition distributor have a better effect.

[0060] refer to Fig.10In a preferred embodiment, the length of the sleeve extending outward relative to the fixed bracket is 3mm-8mm. Because the present invention uses a thicker sleeve 202, the gas leakage problem when assembled with the ignition distributor 40 can be better solved. On this basis, the length of the sleeve extending outward through the fixed bracket 50 is 3mm-8mm. On the basis of further providing the extension length to ensure the installation sealing, the shorter extension length can also make the ignition distributor more convenient to take and put.

[0061] refer to Figure 2 and Fig.10 In a preferred embodiment, the wall thickness of the sleeve 202 is 1.5 to 3 times the wall thickness of the ejector tube body 201; the wall thickness of the sleeve 202 is 1 mm to 3 mm. By reasonably limiting the wall thickness of the sleeve 202, on the one hand, it does not affect the function of the ejector tube itself, and on the other hand, the reasonable wall thickness of the sleeve can better achieve the sealing of the sleeve 20 and the ignition distributor 40 through the end face to better avoid gas leakage.

[0062] In a preferred embodiment, the fixed bracket 50 has a flanged mounting structure 502 that is turned out toward the ejector tube body 201 at the mounting sleeve 202, and the head end of the sleeve 202 is inserted into the flanged hole formed by the flanged mounting structure. In a further preferred embodiment, the flanged mounting structure 502 is perpendicular to the body 503 of the fixed bracket. The flanged mounting structure 502 provided on the fixed bracket 50 plays a limiting role and ensures that the sleeve 202 is vertical. The head end and tail end referred to in the present invention are the head end and tail end defined along the gas flow direction.

[0063] refer to Figure 2 , Figure 4 , Fig.10 In a preferred embodiment, the ejector tube body 201 has a flared section 2014 at the tail end, and the sleeve 202 is inserted into the flange hole at the head end and then passes through the flange hole to extend into the flared section 2014 of the ejector tube body 201 to connect with the ejector tube body 201. The sleeve 202 and the ejector tube body 201 are closely matched. The lower end surface of the flange structure 502 is matched and connected with the upper end surface of the ejector tube body 201, and the lower end surface of the flange structure 502 is welded and connected with the upper end surface of the ejector tube body 201 to ensure that the welding is sealed and airtight, and the sleeve 202 and the ejector tube body 201 are better connected and airtight. The "upper" and "lower" referred to in this embodiment refer to the installation direction according to the accompanying drawings.

[0064] refer to Figure 8-9 and Figure 17-18In a preferred embodiment, the ignition distributor 80 includes an outer ring wall 81, an inner ring wall 82, and a bottom wall 83. The outer ring wall 81 and the inner ring wall 82 are connected on both sides of the bottom wall 83. The ignition distributor also includes an outer ring gas intake structure and an inner ring gas intake structure 84. The inner ring gas intake structure is located in the space surrounded by the inner ring wall 82. A gas flow channel 85 is formed between the outer ring wall 81 and the inner ring wall 82. The outer ring gas intake structure has an outer ring gas channel 851 that penetrates the bottom wall 83. The outer ring gas channel 851 is connected to the gas flow channel 85. The diameter of the outer ring gas channel 851 is D1, and the width of the gas flow channel 85 is D2, where D1>D2. The outer ring gas intake structure referred to in the present invention refers to a part that can realize the outer ring gas intake, which does not mean that the outer ring gas intake structure is an independent structure, and may also be a structure that is integrated with one or more parts of the outer ring wall 81, the inner ring wall 82, and the bottom wall 83.

[0065] The ignition distributor 80 provided by the present invention increases the cross-sectional area of ​​the outer ring gas channel of the ignition distributor while ensuring that the outer diameter and inner diameter of the ignition distributor and the fire cover are not increased, thereby enhancing the injection capability of the burner and improving the thermal efficiency. By not increasing the outer diameter, the size and preparation cost of the outer fire cover matched with the ignition distributor will not be increased. By not reducing the inner diameter, the problem of less sufficient inner ring combustion due to a smaller area of ​​the inner ring fire cover to supplement secondary air caused by a too small inner diameter can be avoided.

[0066] refer to Figure 8-9 In a preferred embodiment, the inner side of the outer ring wall 81 has a first arc groove 811, and the outer side of the inner ring wall 82 has a second arc groove 821. The first arc groove 811 and the second arc groove 821 constitute a part of the outer ring gas channel 851. Figure 17-18 In another preferred embodiment, the inner side of the outer ring wall 81 is not grooved, and the outer side of the inner ring wall 82 has a second arc groove 821, and the second arc groove 821 constitutes a part of the outer ring gas channel 851. The "inside" referred to in the present invention refers to the area close to the center of the igniter 80; the "outside" refers to the area relatively far from the center of the igniter 80. The present invention can further increase the diameter of the outer ring gas channel 851 on the basis of the fixed width of the gas flow channel 85 by opening arc grooves on the inner side of the outer ring wall 81 and the outer side of the inner ring wall 82, thereby increasing the cross-sectional area of ​​the outer ring gas channel of the igniter, thereby enhancing the induced injection capability of the burner and improving the thermal efficiency.

[0067] refer to Figure 8-9In a preferred embodiment, the outer ring gas intake structure has a first wall body 852 and a second wall body 853 on both sides of the outer ring gas channel 851. The first arm body 852 is connected to the outer ring wall 81 and has a first arc groove 811, and protrudes outward relative to the outer side of the outer ring wall 81. The second wall body 853 is connected to the inner ring wall 82 and has a second arc groove 821, and protrudes inward relative to the inner ring wall 82. Because the first arc groove 811 and the second arc groove 821 are provided in the present invention, the wall thickness of the outer ring wall 81 and the inner ring wall 82 at the outer ring gas channel 851 is reduced. The first wall body 852 and the second wall body 853 can further compensate for the reduced wall thickness of the outer ring wall 81 and the inner ring wall 82, thereby ensuring the structural stability of the outer ring gas intake structure. Reference Figure 17-18 In another preferred embodiment, the outer ring gas intake structure has a second wall 853 on one side of the outer ring gas channel 851 , and the second wall 853 is connected to the inner ring wall 82 where a second arc groove 821 is provided, and protrudes inward relative to the inner ring wall 82 .

[0068] refer to Figure 8-9 and Figure 17-18 In a preferred embodiment, the inner ring gas intake structure 84 has an inner ring gas passage 841, and a secondary air intake port 86 is provided between the inner ring gas intake structure 84 and the inner ring wall 82. The present invention does not need to reduce the radius of the inner ring wall 82, so that a larger inner ring gas passage 841 and a secondary air intake port can be provided.

[0069] refer to Figure 11-12 In a preferred embodiment, a plurality of main fire holes 911 are arranged at intervals on the circumference of the outer wall of the fire cover body of the outer ring fire cover 90, and a flame stabilizing groove 92 with an opening facing outward and extending circumferentially is provided on the outer side of the fire cover body. The flame stabilizing groove 92 is located below the main fire hole 911, and a plurality of lower flame stabilizing holes 94 are arranged at intervals on the circumference of the inner side of the outer wall of the fire cover body. The lower flame stabilizing holes 94 are connected to the flame stabilizing groove 92, and the flame stabilizing groove 92 is connected to the main fire hole 911. In the burner provided by the present invention, the gas forms a large flame of stable combustion at the main fire hole 911, which is used to heat cooking utensils. The gas forms a small flame of stable combustion at the flame stabilizing groove 92, which is connected to the lower flame stabilizing hole 94 through the flame stabilizing groove 92, and the probability of flame separation and flashback at the main fire hole is reduced, and the stable combustion range is increased.

[0070] refer to Figure 11-12In a preferred embodiment, a plurality of upper flame stabilizing holes 93 are arranged at intervals on the circumferential direction of the outer side of the outer wall of the fire cover body, at least some of the adjacent upper flame stabilizing holes 93 are separated from each other by the main fire hole 911, the aperture of the upper flame stabilizing holes 93 is smaller than the aperture of the main fire hole 911, and the outer ring wall, the inner ring wall, the bottom wall and the outer ring fire cover form a gas flow channel 85. Through the cooperation of the upper flame stabilizing holes 93, firstly, the stable combustion range of the main fire hole 911 is increased, and it is not easy to separate the flame and fall out of the fire, and secondly, the unburned gas above the main fire hole 911 is re-ignited, which improves the thermal efficiency and reduces the smoke.

[0071] refer to Figure 1 , Figure 11-12 In a preferred embodiment, the outer ring fire cover is provided with a plurality of 4-9 secondary fire holes 912 at the outlet of the outer ejector tube 20b, and the aperture of the secondary fire holes 912 is smaller than the aperture of the main fire hole 911. Because the gas outlet speed at the outlet of the outer ejector tube 20a is faster, the flame here is longer than that at other positions. By providing the secondary fire holes 912 and reducing the aperture, the gas outlet speed of the fire holes at this location can be reduced, so that the flames of the fire holes of the entire fire cover burn evenly.

[0072] refer to Figure 13-14 In a preferred embodiment, the fixed bracket includes a bracket body 503, a bottom shell mounting plate 501, a mounting plate 51 and a fixing plate 52. The bracket body 503 has an ejector tube mounting position 504 for mounting the ejector tube. The bottom shell mounting plate 501 is bent relative to the bracket body and extends downward (see the attached Fig.13 The mounting plate 51 extends downward relative to the bracket body 503. The mounting plate 51 provided by the present invention can be obtained by stamping and bending a part of the bracket body 503 downward, or it can be an independent mounting plate 51, and then fixed on the bracket body 503 by, for example, welding. The mounting plate 51 and the fixing plate 52 are detachably connected. The detachable referred to in this embodiment can be partially detachable (for example, one end is hinged and the other end is detachable), or the fixing plate 52 can be completely removed. When the fixing plate 52 and the mounting plate 51 are fixed, an installation space for installing the ignition needle 701 and / or the thermocouple 702 is formed between the fixing plate 52 and the mounting plate 51, and the ignition needle 701 and / or the thermocouple 702 can be installed in the space. By extending the mounting plate downward, the ignition needle and the thermocouple can be installed from the side of the burner bracket. Compared with the method of installing from the bottom in the prior art, it has a larger operating space, and it is more convenient to disassemble and assemble. The burner does not need to be disassembled and the thermocouple and the ignition needle can be replaced, which is conducive to after-sales maintenance.

[0073] refer to Fig.14In a preferred embodiment, the mounting plate 21 is a part of the bracket body, and this part is bent downward by stamping to obtain the mounting plate 51. The mounting plate 51 has a first mounting groove 511 with a side opening. When the fixing plate 52 is opened relative to the mounting plate 51, the ignition needle and / or the thermocouple are installed from the side opening of the first mounting groove 511. When the mounting plate 51 and the fixing plate 52 are locked and fixed, the side opening of the first mounting groove 511 is closed by the fixing plate 52, and the ignition needle 701 and / or the thermocouple 702 are installed in the formed installation space. This method of obtaining the mounting plate by stamping the bracket body can save parts and improve installation efficiency, and can further realize the disassembly and assembly of the thermocouple and / or the ignition needle from the side of the burner, making after-sales maintenance more convenient.

[0074] refer to Figure 15-16 In a preferred embodiment, the fixing plate 52 has a second mounting groove 521 with a side opening. When the mounting plate 51 and the fixing plate 52 are fixed, the openings of the first mounting groove 511 and the second mounting groove 521 are opposite to each other, and the first mounting groove 511 and the second mounting groove 521 form an installation space.

[0075] refer to Figure 14-16 In a preferred embodiment, one end of the fixing plate 52 is hinged to the mounting plate 51, and the other end can be detached or fixed relative to the mounting plate 51, so that the installation space is opened or closed to achieve the installation of the thermocouple 701 and / or the ignition needle 702. When disassembling the thermocouple and / or the ignition needle, only one end of the fixing plate 52 needs to be opened, which improves the convenience of after-sales maintenance.

[0076] refer to Figure 14-16 In a preferred embodiment, one end of the fixing plate 52 has a bending plug 523, and one end of the mounting plate 51 has an opening 513. The thickness of the bending plug 523 in a natural state is L1, and the width of the opening is L2, L1>L2. The bending plug 523 can be limited in the opening 513 in a natural state. The thickness of the bending plug 523 can be compressed under the action of an external force, so that the bending plug can be inserted into or pulled out of the opening 513. This structure allows the fixing plate 52 to be replaced and is easy for after-sales maintenance. During installation, the bending plug 523 is pinched by hand to compress the thickness and inserted into the opening 513. The bending plug 523 can be limited in the opening 513 in a natural state, achieving the effect of one end being hinged. When disassembling and assembling the thermocouple and / or the ignition needle, only the other end needs to be disassembled. Because this end of the fixing plate 52 is hinged and limited, it will not fall out, making disassembly and assembly simpler and more conducive to maintenance.

[0077] refer to Figure 14-16In a preferred embodiment, the other end of the fixing plate 52 has a first screw hole 522, and the other end of the mounting plate 51 has a second screw hole 512. The mounting plate 51 and the fixing plate 52 are detachably fixed by bolts passing through the first screw hole 522 and the second screw hole 512.

[0078] In this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0079] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0080] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A burner, characterized in that: It includes a fixed bracket, an adjusting plate, an air damper plate, an ejector tube, an ignition divider and an outer ring fire cover, wherein the adjusting plate, the air damper plate, the ejector tube, the ignition divider and the outer ring fire cover are sequentially connected and arranged along the direction of gas flow, the air damper plate includes a base plate structure and an annular flange structure surrounding the base plate structure, the annular flange structure protrudes relative to the base plate structure toward the direction of installing the ejector tube, an ejector tube mounting position is formed in the flange structure, the ejector tube is installed in the ejector tube mounting position, so that the annular flange structure of the air damper plate surrounds the air inlet end of the ejector tube; the air damper plate has a flange portion flipped up toward the adjusting plate at the air inlet, and the flange portion is folded from the air inlet to the outer peripheral side, and the adjusting plate is limited to the limiting space formed by the flange portion.

2. The burner according to claim 1, characterized in that The flange portion includes a first flange and a second flange connected to each other, the first flange is turned up from the bottom plate toward the adjustment plate, the first flange surrounds the air inlet, the second flange is folded toward the outer peripheral side relative to the first flange, and the bottom plate, the first flange and the second flange are connected in sequence and form the limiting space therebetween; The first flange is perpendicular to the bottom plate, and the second flange is perpendicular to the first flange.

3. The burner according to claim 1, characterized in that The annular flange structure of the damper plate and the ejector tube are fully welded by a brazing process.

4. The burner according to claim 1, characterized in that The ejector tube includes an ejector tube body and a sleeve in sequence along the gas flow direction, the end of the sleeve is used to connect to the ignition divider, the sleeve is fixed on the fixed bracket, and protrudes toward the ignition divider relative to the fixed bracket, and the wall thickness of the sleeve is greater than the wall thickness of the ejector tube body; a sleeve mounting position for mounting the sleeve is provided on the ignition divider, the end of the sleeve is installed in the sleeve mounting position, and the sleeve mounting position has an end face matching portion, and the end face of the sleeve is matched and sealed with the end face of the end face matching portion.

5. The burner according to claim 4, characterized in that The length of the sleeve extending outward relative to the fixed bracket is 3mm-8mm; the wall thickness of the sleeve is 1.5 to 3 times the wall thickness of the ejector tube body, and the wall thickness of the sleeve is 1mm to 3mm.

6. The burner according to claim 4, characterized in that The sleeve installation position has a mounting portion extending toward the ejector tube body, the mounting portion surrounds the sleeve installation position, the end surface matching portion protrudes toward the inside of the installation position, and the sleeve end is inserted into the sleeve installation position; The fixed bracket has a flange mounting structure that is turned out toward the direction of the ejector tube body at the place where the sleeve is installed, the head end of the sleeve is inserted into the flange hole formed by the flange structure, and the ejector tube body has a flared section at the tail end. After the head end of the sleeve is inserted into the flange hole, it passes through the flange hole and extends into the flared section of the ejector tube body to be connected with the ejector tube body; the lower end face of the flange mounting structure is cooperatively connected with the upper end face of the flared section, and the lower end face of the flange mounting structure is welded to the upper end face of the flared section.

7. The burner according to claim 1, characterized in that The ignition divider includes an outer ring wall, an inner ring wall, and a bottom wall, the outer ring wall and the inner ring wall are connected to the two sides of the bottom wall respectively, the ignition divider also includes an outer ring gas intake structure and an inner ring gas intake structure, the inner ring gas intake structure is located in the space surrounded by the inner ring wall, a gas flow channel is formed between the outer ring wall and the inner ring wall, the outer ring gas intake structure has an outer ring gas channel that passes through the bottom wall, the outer ring gas channel is connected to the gas flow channel, the diameter of the outer ring gas channel is D1, the width of the gas flow channel is D2, and D1>D2.

8. The burner according to claim 7, characterized in that The outer ring gas intake structure has a first wall body and a second wall body on both sides of the outer ring gas channel. The first arm body is connected to the outer ring wall at a first arc groove and protrudes outward relative to the outer side of the outer ring wall. The second wall body is connected to the inner ring wall at a second arc groove and protrudes inward relative to the inner ring wall. The first wall arc groove and the second wall arc groove constitute a part of the outer ring gas channel.

9. The burner according to claim 1, characterized in that A plurality of main fire holes are arranged at intervals on the circumferential direction of the outer side of the outer wall of the fire cover body of the outer ring fire cover, and a flame stabilizing groove with an opening facing outward and extending circumferentially is provided on the outer side of the fire cover body, and the flame stabilizing groove is located below the main fire hole, and a plurality of lower flame stabilizing holes are arranged at intervals on the circumferential direction of the inner side of the outer wall of the fire cover body, and the lower flame stabilizing holes are connected to the flame stabilizing groove, and the flame stabilizing groove is connected to the main fire hole; A plurality of upper flame stabilizing holes are also arranged at intervals on the circumferential direction of the outer side of the outer wall of the fire cover body, and some adjacent upper flame stabilizing holes are separated from each other by the main fire hole, and the aperture of the upper flame stabilizing hole is smaller than the aperture of the main fire hole; The outer ring fire cover is provided with a plurality of 4-9 secondary fire holes at the outlet of the outer ejection tube, and the aperture of the secondary fire hole is smaller than the aperture of the main fire hole.

10. The burner according to claim 1, characterized in that The fixed bracket comprises a bracket body, a bottom shell mounting plate, a mounting plate and a fixing plate, the bracket body is provided with an ejector tube mounting position for installing the ejector tube, the bottom shell mounting plate is bent relative to the bracket body and extends downward, the mounting plate extends downward relative to the bracket body, the fixing plate is detachably connected to the mounting plate, and when the fixing plate and the mounting plate are fixed, an installation space is formed between the fixing plate and the mounting plate; the mounting plate is obtained by bending a part of the bracket body downward, and the mounting plate is provided with a first mounting groove with a side opening, and when the mounting plate and the fixing plate are fixed, the opening of the first mounting groove is closed by the fixing plate to form an installation space; The fixing plate has a second mounting groove with a side opening, and when the mounting plate and the fixing plate are fixed, the openings of the first mounting groove and the second mounting groove are opposite to each other, and the first mounting groove and the second mounting groove constitute the mounting space; One end of the fixing plate has a bent plug, and one end of the mounting plate has an opening, the thickness of the bent plug in a natural state is L1, the width of the opening is L2, L1>L2, the bent plug can be confined in the opening in a natural state, and the thickness of the bent plug can be compressed under the action of an external force, so that the bent plug can be inserted into or pulled out of the opening; The other end of the fixing plate has a first screw hole, and the other end of the mounting plate has a second screw hole. The mounting plate and the fixing plate are detachably fixed by bolts passing through the first screw hole and the second screw hole.

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