A burner

Abstract

The application provides a burner, which comprises a fixed support, an adjusting sheet, a damper plate, an ejector pipe, a distributor and an outer ring fire cover, the adjusting sheet, the damper plate, the ejector pipe, the distributor and the outer ring fire cover are sequentially connected and arranged along the direction of gas flow, the damper plate comprises a bottom plate structure and an annular flange structure around the bottom plate structure, the annular flange structure protrudes towards the direction of installing the ejector pipe relative to the bottom plate structure, the flange structure is formed with an ejector pipe mounting position, the ejector pipe is mounted in the ejector pipe mounting position, and the annular flange structure of the damper plate surrounds the air inlet end of the ejector pipe; the damper plate is provided with a flange part at the air inlet, which is turned up towards the adjusting sheet, the flange part is folded outward from the air inlet to the peripheral side, and the adjusting sheet is limited in the limiting space formed by the flange part. The burner provided by the application can better reduce the difficulty of air tightness inspection of the ejector pipe and greatly improve the efficiency of air tightness inspection.

Description

TECHNICAL FIELD

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

[0002] The burner is an important component of the gas stove, which determines the performance of the gas stove. The gas stove generally comprises a panel, a bottom shell and a burner. The panel is fixedly arranged on the top of the bottom shell, and a pot support for supporting a pot is arranged on the panel. The panel and the bottom shell jointly form a cavity, and the bottom of the burner head extends into the cavity and is fixedly connected with the bottom shell. The burner comprises a burner head for mixing gas and primary air. The burner head has an injection pipe in communication with a gas supply device. The injection pipe is mainly used for mixing the gas supplied by the gas supply device with the primary air.

[0003] The outer ring fire cover is one of the components of the gas stove, which is used to transmit the gas to the circumferential side wall of the outer ring fire cover. When ignited, the circumferential side of the outer ring fire cover forms an annular fire ring. In the related art, the fire cover of the gas stove comprises an outer ring fire cover and an inner ring fire cover. A pulse igniter is arranged 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 open towards the inner ring fire cover. 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 sprayed from the outer wall of the circumferential side of the outer ring fire cover is ignited and forms an annular fire wall. The injection pipe needs to be expanded, necked, bent and other processes during production, which inevitably has the risk of cracking. During the combustion process, the injection pipe will leak, which will cause serious accidents. Therefore, during the production process, the gas tightness of the injection pipe needs to be checked. However, the existing burner still has the problem of gas leakage during the sealing check, which greatly increases the difficulty of the gas tightness detection of the injection pipe, cannot correctly judge whether the injection pipe leaks or not, and increases the scrap rate of the injection pipe and the cost. SUMMARY

[0004] Therefore, the present application aims to provide a burner.

[0005] The technical scheme used by the present application is: a burner is provided, comprising a fixed support, an adjusting sheet, a damper plate, an ejector pipe, a distributor and an outer ring flame cover, the adjusting sheet, the damper plate, the ejector pipe, the distributor and the outer ring flame cover are sequentially connected and arranged along the gas flow direction, the damper plate comprises a bottom plate structure and an annular flange structure around the bottom plate structure, the annular flange structure protrudes towards the direction of installing the ejector pipe relative to the bottom plate structure, an ejector pipe mounting position is formed in the flange structure, the ejector pipe is mounted in the ejector pipe mounting position, and the annular flange structure of the damper plate surrounds the gas inlet end of the ejector pipe; the damper plate has a flange part turned up towards the adjusting sheet at the gas inlet, and the flange part is folded outward from the gas inlet, and the adjusting sheet is limited in the limiting space formed by the flange part.

[0006] Preferably, the flange part comprises a first flange and a second flange connected to each other, the first flange is turned up from the bottom plate towards the direction of the adjusting sheet, and the first flange surrounds the gas inlet, and the second flange is folded outward relative to the first flange, and the bottom plate, the first flange and the second flange are sequentially connected 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 pipe are fully welded by brazing process.

[0009] Preferably, the ejector pipe comprises an ejector pipe body and a sleeve in sequence along the gas flow direction, the sleeve is used for connecting the distributor at the end, the sleeve is fixed on the fixed support and protrudes towards the distributor relative to the fixed support, and the wall thickness of the sleeve is greater than that of the ejector pipe body; the distributor is provided with a sleeve mounting position for mounting the sleeve, the end of the sleeve is mounted in the sleeve mounting position, the sleeve mounting position has an end face matching part, and the end face of the end of the sleeve matches and seals with the end face of the end face matching part.

[0010] Preferably, the sleeve protrudes outward relative to the fixed support by a length of 3mm-8mm; the wall thickness of the sleeve is 1.5 times to 3 times of the wall thickness of the ejector pipe body, and the wall thickness of the sleeve is 1mm to 3mm.

[0011] Preferably, the sleeve mounting position has a mounting part extending towards the direction of the ejector pipe body, the mounting part surrounds the sleeve mounting position, the end face matching part protrudes towards the inside of the mounting position, and the end of the sleeve is inserted into the sleeve mounting position.

[0012] The fixed support has a flange installation structure turned outwards towards the direction of the ejector pipe body at the installation position of the sleeve, the sleeve is inserted into a flange hole formed by the flange installation structure, the ejector pipe body has a flared section at the tail end, the sleeve is inserted into the flange hole and then extends into the flared section of the ejector pipe body to be connected with the ejector pipe body, the lower end surface of the flange installation structure is connected with the upper end surface of the flared section, and the lower end surface of the flange installation structure is welded with the upper end surface of the flared section.

[0013] Preferably, the distributor comprises an outer ring wall, an inner ring wall, a bottom wall, the bottom wall is connected with the outer ring wall and the inner ring wall respectively, the distributor further comprises an outer ring gas inlet structure and an inner ring gas inlet structure, the inner ring gas inlet 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 inlet structure has an outer ring gas passage penetrating through the bottom wall, the outer ring gas passage is in communication with the gas flow channel, the diameter of the outer ring gas passage is D1, the width of the gas flow channel is D2, and D1>D2.

[0014] Preferably, the outer ring gas inlet structure has a first wall body and a second wall body on both sides of the outer ring gas passage, the first arm body is connected with 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 with the inner ring wall at a second arc groove, and protrudes inward relative to the inner ring wall, and the first wall arc groove and the second wall arc groove form part of the outer ring gas passage.

[0015] Preferably, the outer wall of the fire cover body of the outer ring fire cover is provided with a plurality of main fire holes arranged at intervals in the circumferential direction of the outer side of the outer wall, the outer side of the fire cover body has a flame stabilizing groove extending outward in the circumferential direction, the flame stabilizing groove is located below the main fire hole, the inner side of the outer wall of the fire cover body is provided with a plurality of lower flame stabilizing holes arranged at intervals in the circumferential direction, the lower flame stabilizing holes are in communication with the flame stabilizing groove, and the flame stabilizing groove is in communication with the main fire hole.

[0016] The outer side of the outer wall of the fire cover body is further provided with a plurality of upper flame stabilizing holes arranged at intervals in the circumferential direction, part of adjacent upper flame stabilizing holes are separated from each other by the main fire hole, and the diameter of the upper flame stabilizing hole is smaller than the diameter of the main fire hole.

[0017] The outer ring fire cover is provided with 4-9 auxiliary fire holes at the outlet of the outer ejector pipe, and the diameter of the auxiliary fire hole is smaller than the diameter of the main fire hole.

[0018] Preferably, the fixing support comprises a support body, a bottom shell mounting plate, a mounting plate and a fixing plate, the support body is provided with an ejector pipe mounting position for mounting an ejector pipe, the bottom shell mounting plate extends downward after being bent relative to the support body, the mounting plate extends downward relative to the support body, and the fixing plate is detachably connected to the mounting plate.

[0019] The mounting plate is obtained by bending a part of the support body downward, and the mounting plate is provided with a first mounting groove with a side opening, and the first mounting groove opening is closed to form an installation space when the mounting plate and the fixing plate are fixed.

[0020] The fixing plate is provided with a second mounting groove with a side opening, and the openings of the first mounting groove and the second mounting groove are opposite when the mounting plate and the fixing plate are fixed, and the first mounting groove and the second mounting groove constitute the installation space.

[0021] One end of the fixing plate is provided with a bent plug, one end of the mounting plate is provided with 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 in a natural state can be limited in the opening, and the thickness of the bent plug can be compressed under 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 is provided with a first screw hole, and the other end of the mounting plate is provided with a second screw hole, and the mounting plate and the fixing plate are detachably fixed by a bolt passing through the first screw hole and the second screw hole.

[0023] The burner provided by the application can better reduce the difficulty of air tightness inspection of the ejector pipe, greatly improve the efficiency of air tightness inspection, and provide better protection for product production and preparation. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which preferred embodiments of the application are shown. Like reference numerals refer to like elements throughout. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the application.

[0025] Figure 1 The burner structure schematic diagram provided by the application.

[0026] Figure 2 The ejector pipe structure schematic diagram provided by the application.

[0027] Figure 3The air door plate structure schematic diagram provided by the present application.

[0028] Figure 4 The air door plate and the injection pipe connection structure schematic diagram provided by the present application.

[0029] Figure 5 The adjusting piece and the air door plate connection structure schematic diagram provided by the present application.

[0030] Figure 6 The adjusting piece structure schematic diagram provided by the present application.

[0031] Figure 7 The adjusting piece and the air door plate connection cross section structure schematic diagram provided by the present application.

[0032] Figure 8 The igniter structure schematic diagram provided by the present application.

[0033] Figure 9 The igniter cross section structure schematic diagram provided by the present application.

[0034] Figure 10 The injection pipe and other components connection structure schematic diagram provided by the present application.

[0035] Figure 11 The outer ring fire cover structure schematic diagram provided by the present application.

[0036] Figure 12 The outer ring fire cover cross section structure schematic diagram provided by the present application.

[0037] Figure 13 The fixed support fixed point needle and thermocouple structure schematic diagram provided by the present application.

[0038] Figure 14 The fixed support structure schematic diagram provided by the present application.

[0039] Figure 15 The fixed plate first angle structure schematic diagram provided by the present application.

[0040] Figure 16 The fixed part second angle structure schematic diagram provided by the present application.

[0041] Figure 17 The another igniter structure schematic diagram provided by the present application.

[0042] Figure 18 The igniter cross section structure schematic diagram provided by the present application. Figure 17 DETAILED DESCRIPTION

[0043] ​The technical solutions of the present application will be described in further detail below with reference to the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. However, the embodiments are not intended to limit the present application. In the embodiments, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated as a whole, or a middle element can exist at the same time. The terms "mounting", "one end", "the other end" and the like used in the present application are only for the purpose of description.

[0045] Please refer to Figures 1-18 The present application provides a burner, which comprises a fixed support 50, an adjusting sheet 60, a damper plate 10, an ejector pipe 20, a pilot burner 40 and an outer ring flame cover 90. The adjusting sheet 60, the damper plate 10, the ejector pipe 20, the pilot burner 40 and the outer ring flame cover 90 are sequentially connected and arranged along the direction of gas flow.

[0046] Reference Figure 2 The ejector pipe 20 has two, namely an outer ejector pipe 20a and an inner ejector pipe 20b, both of which are fixed to the fixed support 50, and sequentially comprise an ejector pipe body 201 and a sleeve 202 along the direction of gas flow, and the sleeve 202 protrudes towards the pilot burner 40 relative to the fixed support 50. The wall thickness of the sleeve 202 is greater than that of the ejector pipe body 201. The ejector pipe 20 provided by the present application is divided into the ejector pipe body 201 and the sleeve 202, the wall thickness of the ejector pipe body 201 can be relatively thin, and the cost can be maintained relatively low to ensure better processing and molding. The wall thickness of the end surface of the sleeve 202 is relatively thick, and the relatively thick wall thickness allows the sleeve 202 and the pilot burner 40 to be sealed by the end surface, thereby better ensuring that the sleeve 202 and the pilot burner 40 are not easy to leak.

[0047] Reference Figures 3-5, the damper plate 10 comprises a bottom plate structure 101 and a ring-shaped flange structure 102 around the bottom plate structure 101, the ring-shaped flange structure 102 protrudes towards the direction of installing the ejector pipe 20 relative to the bottom plate structure 101, the flange structure 102 is formed with an ejector pipe installation position, and the ejector pipe 20 is installed in the ejector pipe installation position, so that the ring-shaped flange structure 102 of the damper plate surrounds the air inlet end of the ejector pipe 20. The damper plate 10 has a flange part 103 turned up towards the adjusting piece 60 at the air inlet 601, and the flange part 103 is turned over to the outer circumferential side at the air inlet 602, and the adjusting piece 60 is limited in the limiting space formed by the flange part 103.

[0048] The ring-shaped flange structure 102 is provided, so that the 360° contact with the inlet of the ejector pipe 20 is realized, the close fit of the damper plate 10 and the inlet of the ejector pipe 20 is ensured, and there is no gap. The close fit of the damper plate and the inlet of the ejector pipe is ensured, and there is no gap, so that the problem of air tightness detection is solved. Compared with the prior art, the damper plate structure is convenient to weld, the production efficiency is greatly improved, and the damper plate structure can be fully welded by using a brazing process, so that the gap between the damper plate and the ejector pipe is further reduced, and the difficulty of air tightness detection of the ejector pipe is reduced.

[0049] The flange part 103 is provided, so that the air tightness detection accuracy of the burner base is improved, the gap between the adjusting piece 60 and the damper plate 10 is avoided, and air leakage is avoided from the gap between the contact surface of the damper plate and the adjusting piece.

[0050] The burner provided by the present application is provided with the ring-shaped flange structure 102, so that air leakage at the connection between the damper plate 10 and the ejector pipe 20 can be avoided. The outer flange structure of the damper plate 10 at the air inlet can avoid air leakage at the contact surface between the adjusting piece 60 and the damper plate 10. The burner provided by the present application can reduce the difficulty of air tightness detection of the ejector pipe, and greatly improve the efficiency of air tightness detection.

[0051] Reference Figure 5 In the preferred embodiment, the damper plate 10 and the adjusting piece 60 form a damper adjusting device, the damper adjusting device has an air inlet 601 and an air adjusting opening 602 penetrating through 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 is provided with a shielding part 601, when the adjusting piece 60 rotates relative to the damper plate 10, the shielding part 601 can make the air adjusting opening 602 larger or smaller, one side of the damper plate 10 is connected with the ejector pipe 20, and the other side of the damper plate 10 is connected with the adjusting piece 60.

[0052] Reference Figure 3 , Figures 5-6In the preferred embodiment, the damper plate 10 is provided with a plurality of adjustment holes 1013, the blocking part 601 of the adjustment piece 60 is provided with a positioning protrusion 602, the positioning protrusion 602 is matched with the adjustment hole 1013, when the adjustment piece 60 rotates relative to the damper plate 10, the positioning protrusion 602 can be clamped into one of the plurality of adjustment holes 1013. When the burner is working, primary air will enter the injection pipe 20 from the air adjusting port 602, the adjustment piece 60 is provided with a matched opening 603, when the adjustment piece 60 is at zero position, the air inlet 1012 of the damper pipe 10 and the matched opening 603 are coincident, at this time, the area of the air adjusting port 602 is maximum, the cross-sectional area of the air adjusting port to the injector is maximum, and the injection performance is best, when the adjustment piece 60 rotates, the air inlet 1012 of the damper pipe 10 and the matched opening 603 on the adjustment piece 60 are slowly misaligned, the blocking part 601 partially blocks the air inlet 1012 of the damper pipe 10, so that the area of the air adjusting port 603 is reduced, at this time, the cross-sectional area of the primary air entering the injection pipe is slowly reduced, and the injection performance is gradually reduced. When the flame appears to be off-flame, the adjustment piece 60 can be rotated to reduce the cross-sectional area of the primary injection air inlet, so as to reduce the injection capacity of the burner and solve the off-flame problem, when the flame appears to be yellow, the adjustment piece 60 can be rotated to increase the cross-sectional area of the primary injection air inlet, so as to increase the injection capacity of the burner and solve the yellow flame problem.

[0053] Reference Figure 7 In the preferred embodiment, the flange part 103 comprises a first flange 1031 and a second flange 1032 connected to each other, the first flange 1031 is folded upwards from the bottom plate 1033 towards the direction of the adjustment piece 60, the first flange 1031 surrounds the air inlet 601, the second flange 1032 is folded outwardly relative to the first flange 1031, the bottom plate 1033, the first flange 1031 and the second flange 1032 are connected in sequence and form a limiting space for fixing the adjustment piece 60. This structure can ensure that there is no air leakage.

[0054] Reference Figure 7 In the 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 perpendicularity referred to in the present application allows an error of plus or minus 5 degrees.

[0055] Reference Figures 3-4 In the preferred embodiment, the annular flange structure 102 of the damper plate 10 is fully welded with the injection pipe 20 by brazing process, and a welding structure is formed at the connection between the two, and the welding structure surrounds the injection pipe once. Further reducing the gap between the damper plate and the injection pipe can reduce the difficulty of air tightness test of the injection pipe.

[0056] Reference Figures 1-2 And Figure 10In the preferred embodiment, the ejector pipe sequentially comprises the ejector pipe body 201 and the sleeve 202 along the direction of the gas flow, the sleeve 202 is used to connect the distributor 40, the sleeve 202 is fixed on the fixed support 50 and protrudes towards the distributor 40 relative to the fixed support 50, and the wall thickness of the sleeve 202 is greater than that of the ejector pipe body 201.

[0057] The ejector pipe assembly provided by the present application divides the ejector pipe into the ejector pipe body 201 and the sleeve 202, the wall thickness of the ejector pipe body 201 can be relatively thin, the cost can be maintained relatively low and the good processing and molding are ensured. Meanwhile, the present application is also matched with the sleeve 202 with the relatively thick wall thickness, because the wall thickness of the end surface of the sleeve 202 is relatively thick, the sleeve 202 and the distributor 40 can be sealed through the end surface, and the gas leakage between the sleeve 202 and the distributor 40 is avoided. Meanwhile, because the sleeve 202 with the relatively thick wall thickness is adopted in the present application, the length of the sleeve 202 protruding from the fixed support 50 can be short, and the problem that the distributor is difficult to take and place is solved, and the safety accidents caused by the fire leakage if the distributor is not placed in place are avoided.

[0058] Reference Figures 8-10 In the preferred embodiment, the distributor 40 is provided with a sleeve installation position for installing the sleeve 202, that is, the sleeve 202 of the outer ejector pipe can be installed at the outer ring gas passage 851, and the sleeve 202 of the inner ejector pipe can be installed at the inner ring gas passage 841. The end of the sleeve 202 is installed in the sleeve installation position. The sleeve installation position is provided with an end surface matching portion 41, and the end surface of the sleeve 202 is tightly matched with the end surface matching portion 41. Figure 9 The connection structure of the outer ejector pipe is shown, and the inner ejector pipe is also sealed through the end surface matching with the distributor 40. The sleeve 202 and the distributor 40 can be well sealed through the relatively thick wall thickness of the sleeve 202, have good sealing effect, and the gas leakage can be avoided.

[0059] Reference Figure 10 In the preferred embodiment, the sleeve installation position is provided with an installation portion 42 extending towards the direction of the ejector pipe body, the installation portion 42 surrounds the sleeve installation position, the end surface matching portion 41 protrudes towards 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 realize the good installation and positioning of the sleeve 202 on the one hand, and can be well sealed through the end surface matching on the other hand, so that the installation and sealing of the ejector pipe and the distributor have good effect.

[0060] Reference Figure 10In the preferred embodiment, the length of the sleeve extending outward relative to the fixed support is 3mm-8mm. Because the sleeve 202 of the present application has a relatively thick wall, the air leakage problem during assembly with the igniter 40 can be better solved. On this basis, the length of the fixed support 50 extending outward is 3mm-8mm, which further provides the extending length to ensure the sealing during installation, and the shorter extending length also makes the igniter easier to take and place.

[0061] With reference to Figure 2 and Figure 10 In the preferred embodiment, the wall thickness of the sleeve 202 is 1.5 times to 3 times the wall thickness of the main body 201 of the ejector pipe, and the wall thickness of the sleeve 202 is 1mm to 3mm. Through the reasonable limitation of the wall thickness of the sleeve 202, on the one hand, the function of the ejector pipe itself is not affected, and on the other hand, the reasonable wall thickness of the sleeve can better realize the sealing of the sleeve 202 and the igniter 40 through the end face to better avoid air leakage.

[0062] In the preferred embodiment, the fixed support 50 has a folded edge installation structure 502 at the position of installing the sleeve 202, which is folded towards the direction of the main body 201 of the ejector pipe, and the first end of the sleeve 202 is inserted into the folded edge hole formed by the folded edge structure. In the further preferred embodiment, the folded edge installation structure 502 is perpendicular to the main body 503 of the fixed support. The folded edge installation structure 502 of the fixed support 50 plays a limiting role and ensures the verticality of the sleeve 202. The first end and the tail end referred to in the present application are defined along the direction of the gas flow.

[0063] With reference to Figure 2 , Figure 4 , Figure 10 In the preferred embodiment, the main body 201 of the ejector pipe has a flared section 2014 at the tail end, and after the first end of the sleeve 202 is inserted into the folded edge hole, the sleeve 202 extends into the flared section 2014 of the main body 201 of the ejector pipe to connect with the main body 201 of the ejector pipe. The sleeve 202 and the main body 201 of the ejector pipe are tightly matched. The lower end surface of the folded edge structure 502 is connected with the upper end surface of the main body 201 of the ejector pipe, and the lower end surface of the folded edge structure 502 is welded with the upper end surface of the main body 201 of the ejector pipe to ensure that the welding position is sealed and does not leak air, and the sleeve 202 and the main body 201 of the ejector pipe are better connected and do not leak air. In the present embodiment, "upper" and "lower" refer to the installation direction shown in the drawings.

[0064] With reference to Figures 8-9 and Figures 17-18In the preferred embodiment, the distributor 80 comprises an outer ring wall 81, an inner ring wall 82, a bottom wall 83 connected to the outer ring wall 81 and the inner ring wall 82 respectively, an outer ring gas inlet structure and an inner ring gas inlet structure 84, the inner ring gas inlet 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 inlet structure has an outer ring gas passage 851 penetrating through the bottom wall 83, the outer ring gas passage 851 is in communication with the gas flow channel 85, the diameter of the outer ring gas passage 851 is D1, the width of the gas flow channel 85 is D2, and D1>D2. The outer ring gas inlet structure referred to in the present application refers to the part that can realize the outer ring gas inlet, and does not mean that the outer ring gas inlet structure is an independent structure, but also can be a structure integrated with one or more parts of the outer ring wall 81, the inner ring wall 82 and the bottom wall 83.

[0065] The distributor 80 provided by the present application can increase the cross-sectional area of the outer ring gas passage of the distributor without increasing the outer diameter and the inner diameter of the distributor and the fire cap, thereby enhancing the injection capacity of the burner and improving the thermal efficiency. Without increasing the outer diameter, the size and the manufacturing cost of the outer fire cap matched with the distributor can not be increased. Without reducing the inner diameter, the problem that the smaller the inner diameter is, the smaller the area of the inner ring fire cap for supplementing secondary air is and the less sufficient the inner ring combustion is can be avoided.

[0066] Reference Figures 8-9 In the preferred embodiment, the inner side of the outer ring wall 81 has a first arc groove 811, the outer side of the inner ring wall 82 has a second arc groove 821, and the first arc groove 811 and the second arc groove 821 form part of the outer ring gas passage 851. Reference Figures 17-18 In another preferred embodiment, the inner side of the outer ring wall 81 is not grooved, the outer side of the inner ring wall 82 has a second arc groove 821, and the second arc groove 821 forms part of the outer ring gas passage 851. In the present application, “inner” refers to the position close to the center of the distributor 80, and “outer” refers to the position relatively far away from the center of the distributor 80. By means of the arc grooves on the inner side of the outer ring wall 81 and the outer side of the inner ring wall 82, the diameter of the outer ring gas passage 851 can be further increased on the basis of the fixed width of the gas flow channel 85, the cross-sectional area of the outer ring gas passage of the distributor can be increased, thereby enhancing the injection capacity of the burner and improving the thermal efficiency.

[0067] Reference Figures 8-9In the preferred embodiment, the outer ring gas inlet structure has a first wall 852 and a second wall 853 on both sides of the outer ring gas passage 851. The first wall 852 is connected to the outer ring wall 81 at the first arc groove 811 and protrudes outward relative to the outer side of the outer ring wall 81. The second wall 853 is connected to the inner ring wall 82 at the second arc groove 821 and protrudes inward relative to the inner ring wall 82. Because of the first arc groove 811 and the second arc groove 821, the thickness of the outer ring wall 81 and the inner ring wall 82 at the outer ring gas passage 851 is reduced. The first wall 852 and the second wall 853 can further compensate for the reduced thickness of the outer ring wall 81 and the inner ring wall 82, ensuring the structural stability of the outer ring gas inlet structure. Figures 17-18 In another preferred embodiment, the outer ring gas inlet structure has a second wall 853 on one side of the outer ring gas passage 851. The second wall 853 is connected to the inner ring wall 82 at the second arc groove 821 and protrudes inward relative to the inner ring wall 82.

[0068] Reference Figures 8-9 And Figures 17-18 In the preferred embodiment, the inner ring gas inlet structure 84 has an inner ring gas passage 841, and the inner ring gas inlet structure 84 has a secondary air inlet 86 between the inner ring gas inlet structure 84 and the inner ring wall 82. The radius of the inner ring wall 82 is not reduced, so that the inner ring gas passage 841 and the secondary air inlet 86 can be larger.

[0069] Reference Figures 11-12 In the preferred embodiment, the outer ring flame cover 90 has a plurality of main flame holes 911 spaced apart on the outer wall of the flame cover body. The outer side of the flame cover body has an outwardly open and circumferentially extending flame stabilizing groove 92 located below the main flame holes 911. The inner side of the outer wall of the flame cover body has a plurality of lower flame stabilizing holes 94 spaced apart circumferentially. The lower flame stabilizing holes 94 are in communication with the flame stabilizing groove 92, and the flame stabilizing groove 92 is in communication with the main flame holes 911. The burner provided by the present application forms a stable and large flame at the main flame holes 911 for heating a cooking appliance. The stable and small flame is formed at the flame stabilizing groove 92 through the connection of the flame stabilizing groove 92 and the lower flame stabilizing holes 94, reducing the probability of flame deviation and backfire at the main flame holes, and increasing the stable combustion range.

[0070] Reference Figures 11-12In the preferred embodiment, a plurality of upper stable flame holes 93 are arranged on the outer wall of the fire cap body in the circumferential direction, and at least some adjacent upper stable flame holes 93 are separated from each other by the main fire hole 911. The diameter of the upper stable flame hole 93 is smaller than that of the main fire hole 911. The outer ring wall, the inner ring wall, the bottom wall and the outer ring fire cap form a gas flow channel 85. Through the cooperation of the upper stable flame hole 93, firstly, the stable combustion range of the main fire hole 911 is increased, and off-flame and off-fire are less likely to occur. Secondly, the unburned gas above the main fire hole 911 is re-ignited, which improves the thermal efficiency and reduces the flue gas.

[0071] Reference Figure 1 , Figures 11-12 In the preferred embodiment, the outer ring fire cap is provided with 4-9 auxiliary fire holes 912 at the outlet of the outer ejector pipe 20b. The diameter of the auxiliary fire hole 912 is smaller than that of the main fire hole 911. Because the gas outlet velocity is fast at the outlet of the outer ejector pipe 20a, the flame is longer at this position than at other positions. By arranging the auxiliary fire hole 912, reducing the diameter can reduce the gas outlet velocity of the fire hole at this position, so that the combustion flame of the fire holes of the entire fire cap is uniform.

[0072] Reference Figures 13-14 In the preferred embodiment, the fixing 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 is provided with an ejector pipe mounting position 504 for mounting the ejector pipe. The bottom shell mounting plate 501 extends downward after being bent relative to the bracket body (see FIG. 4). Figure 13 As can be understood, the mounting plate 51 extends downward relative to the bracket body 503. The mounting plate 51 provided by the present application can be a part of the bracket body 503 punched and bent downward, or can be a separate mounting plate 51 which is then fixed to the bracket body 503 by welding, for example. The mounting plate 51 and the fixing plate 52 are detachably connected. In the present embodiment, detachable can mean partially detachable (for example, one end is hinged, and the other end is detachable), or the fixing plate 52 can be completely detached. When the fixing plate 52 and the mounting plate 51 are fixed, an installation space for mounting the ignition needle 701 and / or the thermocouple 702 is formed between the fixing plate 52 and the mounting plate 51, so that the ignition needle 701 and / or the thermocouple 702 can be installed in the space. By arranging the mounting plate to extend downward, the ignition needle and the thermocouple can be installed from the side of the burner support, which has a larger operable space relative to the installation from the bottom in the prior art, and 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 beneficial to after-sales maintenance.

[0073] Reference Figure 14In the preferred embodiment, the mounting plate 21 is part of the bracket body, which is obtained by punching and bending downward the mounting plate 51, and the mounting plate 51 has a first mounting slot 511 with a side opening. When the fixing plate 52 is opened relative to the mounting plate 51, the ignition needle and / or thermocouple are loaded from the side opening of the first mounting slot 511. When the mounting plate 51 and the fixing plate 52 are locked and fixed, the side opening of the first mounting slot 511 is closed by the fixing plate 52, forming an installation space for mounting the ignition needle 701 and / or thermocouple 702. This way of obtaining the mounting plate by punching the bracket body can save parts, improve installation efficiency, and further realize the disassembly of the thermocouple and / or ignition needle from the side of the burner head, making after-sales maintenance more convenient.

[0074] Reference Figures 15-16 In the preferred embodiment, the fixing plate 52 has a second mounting slot 521 with a side opening, and when the mounting plate 51 and the fixing plate 52 are fixed, the openings of the first mounting slot 511 and the second mounting slot 521 are opposite, and the first mounting slot 511 and the second mounting slot 521 form an installation space.

[0075] Reference Figures 14-16 In the 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, and the thermocouple 701 and / or ignition needle 702 are installed. When disassembling the thermocouple and / or ignition needle, only one end of the fixing plate 52 needs to be opened, improving the convenience of after-sales maintenance.

[0076] Reference Figures 14-16 In the preferred embodiment, one end of the fixing plate 52 has a bent plug 523, and one end of the mounting plate 51 has an opening 513. The thickness of the bent plug 523 in the natural state is L1, and the width of the opening is L2, L1>L2. The bent plug 523 in the natural state can be limited in the opening 513, and the thickness of the bent plug 523 can be compressed under external force, so that the bent plug can be inserted into or pulled out of the opening 513. This structure makes the fixing plate 52 also replaceable, easy for after-sales maintenance. When installing, the bent plug 523 is pinched and compressed in thickness by hand, inserted into the opening 513, and the bent plug 523 in the natural state can be limited in the opening 513, achieving the effect of hinging one end. When disassembling the thermocouple and / or ignition needle, only the other end needs to be disassembled. The fixing plate 52 will not fall out because of the hinged and limited one end, making disassembly simpler and more convenient for maintenance.

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

[0078] In the present specification, unless explicitly defined and limited, a first feature is "on" or "under" a second feature can be 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, the first feature "over", "above" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0079] In the description of the present specification, the description of the terms "preferred embodiment", "further embodiment", "other embodiment" or "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0080] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A burner, characterized by The fixed support, the adjusting sheet, the damper plate, the ejector pipe, the igniter and the outer ring fire cover are sequentially connected and arranged along the gas flow direction, the damper plate comprises a bottom plate structure and an annular flange structure around the bottom plate structure, the annular flange structure protrudes towards the direction of installing the ejector pipe relative to the bottom plate structure, the annular flange structure is formed with an ejector pipe mounting position, the ejector pipe is mounted in the ejector pipe mounting position, and the annular flange structure of the damper plate surrounds the gas inlet end of the ejector pipe; the damper plate is provided with a flange part turned up towards the adjusting sheet at the gas inlet, the flange part is folded outward from the gas inlet, and the adjusting sheet is limited in the limiting space formed by the flange part.

2. The burner of claim 1, wherein The flange part comprises a first flange and a second flange connected to each other, the first flange is turned up from the bottom plate towards the direction of the adjusting sheet, and the first flange surrounds the gas inlet; the second flange is folded outward relative to the first flange, and the bottom plate, the first flange and the second flange are sequentially connected 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 of claim 1, wherein The annular flange structure of the damper plate and the ejector pipe are fully welded through a brazing process.

4. The burner of claim 1, wherein The ejector pipe sequentially comprises an ejector pipe body and a sleeve along the gas flow direction, the sleeve is used for connecting the igniter, the sleeve is fixed on the fixed support and protrudes towards the igniter relative to the fixed support, and the wall thickness of the sleeve is greater than that of the ejector pipe body; the igniter is provided with a sleeve mounting position for mounting the sleeve, the end of the sleeve is mounted in the sleeve mounting position, and the sleeve mounting position is provided with an end face matching part, and the end face of the sleeve is matched and sealed with the end face of the end face matching part.

5. The burner of claim 4, wherein The sleeve protrudes outward relative to the fixed support by a length of 3mm-8mm, the wall thickness of the sleeve is 1.5 times to 3 times the wall thickness of the ejector pipe body, and the wall thickness of the sleeve is 1mm to 3mm.

6. The burner of claim 4, wherein The sleeve mounting position is provided with a mounting part extending towards the direction of the ejector pipe body, the mounting part surrounds the sleeve mounting position, the end face matching part protrudes towards the inside of the sleeve mounting position, and the end of the sleeve is inserted into the sleeve mounting position; The fixed support is provided with a flange mounting structure turned outwards towards the direction of the ejector pipe body at the position of mounting the sleeve, the first end of the sleeve is inserted into a flange hole formed by the flange mounting structure, the ejector pipe body is provided with a flared section at the tail end, the first end of the sleeve is inserted into the flange hole and then extends into the flared section of the ejector pipe body to be connected with the ejector pipe body, the lower end face of the flange mounting structure is matched and connected with the upper end face of the flared section, and the lower end face of the flange mounting structure is welded with the upper end face of the flared section.

7. The burner of claim 1, wherein The spark distributor comprises an outer ring wall, an inner ring wall, a bottom wall, the bottom wall is connected with the outer ring wall and the inner ring wall respectively, the spark distributor further comprises an outer ring gas inlet structure and an inner ring gas inlet structure, the inner ring gas inlet 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 inlet structure has an outer ring gas passage penetrating through the bottom wall, the outer ring gas passage is communicated with the gas flow channel, the diameter of the outer ring gas passage is D1, the width of the gas flow channel is D2, and D1>D2.

8. The burner of claim 7, wherein The outer ring gas inlet structure has a first wall body and a second wall body on both sides of the outer ring gas passage, the inner side of the outer ring wall has a first arc groove, the outer side of the inner ring wall has a second arc groove, the first wall body is connected to the outer ring wall with the 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 with the second arc groove and protrudes inward relative to the inner ring wall, and the first arc groove and the second arc groove form part of the outer ring gas passage.

9. The burner of claim 1, wherein The outer wall of the fire cover body of the outer ring fire cover is provided with a plurality of main fire holes arranged at intervals in the circumferential direction, the outer side of the fire cover body has a flame stabilizing groove which is open outward and extends in the circumferential direction, the flame stabilizing groove is located below the main fire hole, the inner side of the outer wall of the fire cover body is provided with a plurality of lower flame stabilizing holes arranged at intervals in the circumferential direction, the lower flame stabilizing holes are communicated with the flame stabilizing groove, and the flame stabilizing groove is communicated with the main fire hole. The outer side of the outer wall of the fire cover body is further provided with a plurality of upper flame stabilizing holes arranged at intervals in the circumferential direction, part of adjacent upper flame stabilizing holes are separated from each other by the main fire hole, and the hole diameter of the upper flame stabilizing hole is smaller than the hole diameter of the main fire hole. The outer ring fire cover is provided with 4-9 auxiliary fire holes at the outlet of the outer ejection pipe, and the hole diameter of the auxiliary fire hole is smaller than the hole diameter of the main fire hole.

10. The burner of claim 1, wherein The fixing support comprises a support body, a mounting plate and a fixing plate, the support body is provided with an ejection pipe mounting position for mounting the ejection pipe, the mounting plate extends downward after being bent relative to the support 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 support body downward, the mounting plate is provided with a first installation groove which is open in the side surface, and when the mounting plate and the fixing plate are fixed, the opening of the first installation groove is closed by the fixing plate to form the installation space. The fixing plate is provided with a second installation groove which is open in the side surface, and when the mounting plate and the fixing plate are fixed, the openings of the first installation groove and the second installation groove are opposite to each other, and the first installation groove and the second installation groove form the installation space. One end of the fixed plate has a bent plug, one end of the mounting plate has an opening, the thickness of the bent plug in the natural state is L1, the width of the opening is L2, L1>L2, the bent plug in the natural state can be limited in the opening, the thickness of the bent plug can be compressed under external force, so that the bent plug can be inserted into the opening or pulled out of the opening; The other end of the fixed plate has a first screw hole, the other end of the mounting plate has a second screw hole, and the mounting plate and the fixed plate are detachably fixed by a bolt passing through the first screw hole and the second screw hole.

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