Air door adjusting device of gas stove and burner

Abstract

The utility model provides an air door adjusting device of a gas stove and a burner. The air door adjusting device of the gas stove comprises an air door plate and an adjusting sheet, the air door adjusting device is provided with an air inlet and an air adjusting opening which penetrate through the air door plate and the adjusting sheet, the adjusting sheet can rotate relative to the air door plate, the adjusting sheet is provided with a shielding part, and when the adjusting sheet rotates relative to the air door plate, the shielding part can enable the air adjusting opening to become larger or smaller. One side of the air door plate is connected with the injection pipe, the other side of the air door plate is connected with the adjusting sheet, the air door plate is provided with a flanging part turned up towards the adjusting sheet at the air inlet, the flanging part is turned over towards the peripheral side from the air inlet, and the adjusting sheet is limited in a limiting space formed by the flanging part. According to the air door adjusting device provided by the utility model, the air door plate flanging structure can ensure that air cannot leak from a contact surface gap between the air door plate and the adjusting sheet when the combustor base is subjected to air tightness detection, and the accuracy of air tightness detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to an air door regulating device for a gas stove and a burner. Background Art

[0002] A gas stove is a combustion device that ignites a mixture of gas and air to generate a flame, heating items placed on the stove, such as pots. In existing burner structures, a damper plate is installed at the air inlet end of the ejector tube. This damper plate has a through-hole. During combustion, primary air ejected by the ejector enters the ejector tube through this through-hole. The damper plate opening is not adjustable. High gas pressure in a user's home can easily cause flame separation, leading to flame extinguishment. Weaker ejection from the burner can also result in yellow flames, blackening the bottom of the pot.

[0003] There are also some designs of air damper adjustment mechanisms in the prior art, but the structures of the existing air damper adjustment mechanisms are relatively complex. In addition, the existing air damper adjustment mechanism makes it easy for air leakage to occur when the burner base is tested for air tightness, and the accuracy of the air tightness test is poor. For example, Figure 1 The installation method of the damper plate 01 and the regulating piece 02, where the regulating piece 02 is riveted inward with its edges turned inward, does not allow for a completely gap-free connection between the damper plate 01 and the regulating piece 02. This can lead to air leakage between the contact surfaces of the damper plate and the regulating piece during airtightness testing, thus failing to improve the accuracy of airtightness testing. However, in the prior art, it is not recognized that the installation method of the damper plate 01 and the regulating piece 02 causes air leakage, and therefore, no better solution has been found. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a damper adjustment device and a burner for a gas stove.

[0005] The utility model provides a damper adjustment device for a gas stove, comprising a damper plate and an adjustment piece, the damper adjustment device having an air inlet and an air adjustment port penetrating the damper plate and the adjustment piece, the adjustment piece being rotatable relative to the damper plate, the adjustment piece being provided with a shielding portion, and when the adjustment piece is rotated relative to the damper plate, the shielding portion can make the air adjustment port larger or smaller, the damper plate being connected to an ejector tube on one side and the adjustment piece being connected to the adjustment piece on the other side, the damper plate being provided with a flange portion at the air inlet which is turned up toward the adjustment piece, and the flange portion being folded from the air inlet toward the outer peripheral side, and the adjustment piece being limited within a limiting space formed by the flange portion.

[0006] Preferably, the damper plate is provided with a plurality of adjustment holes, and a positioning convex bump is provided on the shielding portion of the adjustment piece. When the adjustment piece rotates relative to the damper plate, the positioning convex bump can be stuck into one of the plurality of adjustment holes.

[0007] Preferably, the 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, and an ejector tube installation position is formed in the flange structure.

[0008] Preferably, the flange portion includes a first flange and a second flange that are connected to each other, the first flange is flipped up from the bottom plate of the damper plate toward the direction of the adjusting plate, the first flange surrounds to form the air inlet, and 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.

[0009] Preferably, the first flange is perpendicular to the base plate, and the second flange is perpendicular to the first flange.

[0010] The utility model also provides a burner, comprising the air damper adjustment device of the gas stove, an ejector tube, a flame distributor and an outer ring fire cover, the air outlet end of the ejector tube is connected to the flame distributor, the air inlet end of the ejector tube is connected to the air damper plate, and the outer ring fire cover is located above the flame distributor.

[0011] Preferably, the burner also includes a fixed bracket for fixing the ejector tube, and the ejector tube includes an ejector tube body and a sleeve in sequence along the gas flow direction. The sleeve is fixed on the fixed bracket and extends outward relative to the fixed bracket. The wall thickness of the sleeve is greater than the wall thickness of the ejector tube body. The ignition divider has a step portion, and the end face of the sleeve is sealed in cooperation with the step portion.

[0012] Preferably, the length of the sleeve extending outward relative to the fixing bracket is 3mm-8mm.

[0013] Preferably, the sleeve wall thickness is 1.5 mm to 3 mm.

[0014] Preferably, the outer ring fire cover includes a fire cover body, and a plurality of main fire holes are provided at intervals on the circumference of the outer side of the outer wall of the fire cover body. The outer ring fire cover is provided with a plurality of 4-9 secondary fire holes at the outlet of the outer ejector tube, and the aperture of the secondary fire hole is smaller than the aperture of the main fire hole. The outer side surface of the fire cover body has a flame stabilizing groove with an opening facing outward and extending circumferentially, and the flame stabilizing groove is located below the main fire hole. A plurality of lower flame stabilizing holes are provided on the circumference of the inner side of the outer wall of the fire cover body, and the lower flame stabilizing holes are connected with the flame stabilizing groove, and the flame stabilizing groove is connected with the main fire hole; a plurality of upper flame stabilizing holes are also provided on the circumference 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 main fire holes or secondary fire holes.

[0015] The outer flange structure of the damper plate of the damper regulating device provided by the utility model can ensure that when the burner base is tested for air tightness, there will be no air leakage from the contact surface gap between the damper plate and the regulating piece, thereby improving the accuracy of the air tightness test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other purposes, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally scaled to actual size. The emphasis is on illustrating the subject matter of the present invention.

[0017] Figure 1 A schematic diagram illustrating the risk of air leakage in the damper adjustment device provided in the prior art.

[0018] Figure 2 This is a structural schematic diagram of the air door adjustment device provided by the utility model.

[0019] Figure 3 This is a schematic diagram of the damper plate structure provided by the utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the adjustment piece provided by the utility model.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the air door adjustment device provided by the utility model.

[0022] Figure 6 This is a schematic diagram of the burner structure provided by the utility model.

[0023] Figure 7 The figure is a schematic diagram of the ejector tube structure provided by the utility model.

[0024] Figure 8 The figure is a schematic diagram of the outer ring fire cover structure provided by the utility model.

[0025] Figure 9 The figure is a schematic diagram of the cross-sectional structure of the outer ring fire cover provided by the present utility model. DETAILED DESCRIPTION

[0026] 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 given do not limit the present invention. In this embodiment, it should be understood that the directions or positional relationships indicated by terms such as "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention.

[0027] 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. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0028] Please refer to Figures 1 to 9 The utility model provides a damper adjustment device for a gas stove, including a damper plate 10 and an adjusting piece 60. The damper adjustment device has an air inlet 601 and an air adjustment port 602 that penetrates 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 adjustment 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. The damper plate 10 has a flange portion 103 that is flipped up toward the adjusting piece 60 at the air inlet 601, and the flange portion 103 is folded toward the outer peripheral side from the air inlet 602, and the adjusting piece 60 is limited in the limited space formed by the flange portion 103.

[0029] The damper adjustment device of the present invention includes an adjustment plate 60, which can be rotated to increase or decrease the air opening, further adjusting the ejection performance. Furthermore, the damper plate outer flange structure of the damper adjustment device provided by the present invention ensures that there is no gap between the adjustment plate 60 and the damper plate 10 during the air tightness test of the burner base, preventing air leakage from the contact gap between the damper plate and the adjustment plate, thereby improving the accuracy of the air tightness test.

[0030] refer to Figure 2 -,5. In 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 piece 60. The positioning convex bump 602 cooperates with the adjustment hole 1013. When the adjustment piece 60 rotates relative to the damper plate 10, the positioning convex bump 602 can be stuck in one of the plurality of adjustment holes 1013.

[0031] The damper adjustment device provided by the utility model is applied to a burner. 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 adjustment plate 60. When the adjustment 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 adjustment plate 60 rotates, the air inlet 1012 of the damper tube 10 and the matching opening 603 on the adjustment plate 60 slowly stagger, and the shielding portion 601 partially blocks the air inlet 1012 of the damper tube 10, so that the area 602 of the air regulating port 603 becomes 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 capacity of the burner and solving the flame-lifting problem. When the flame appears to be yellow flame, the adjusting plate 60 can be rotated to increase the cross-sectional area of ​​the primary induced air inlet, thereby increasing the induced capacity of the burner and solving the yellow flame problem.

[0032] The damper adjustment device provided in this embodiment has segmented adjustment holes 1013 on the damper plate 10. During the rotation of the adjustment piece 60, the positioning protrusion 602 thereon can extend into the segmented adjustment hole 1013, thereby achieving a clicky feel and precise adjustment.

[0033] refer to Figure 5 In a preferred embodiment, the flange portion 103 includes a first flange 1031 and a second flange 1032 that are interconnected. The first flange 1031 is raised from the bottom plate 1033 toward the adjustment plate 60, surrounding the air inlet 601. The second flange 1032 is folded outward relative to the first flange 1031. The bottom plate 1033, the first flange 1031, and the second flange 1032 are sequentially connected, forming a space between them to secure the adjustment plate 60. This structure ensures airtightness.

[0034] refer to Figure 5 In a further 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.

[0035] refer to Figure 3In a preferred embodiment, the damper plate 10 includes a base plate structure 101 and an annular flange structure 102 that surrounds the base plate structure 101. The annular flange structure 102 protrudes relative to the base plate structure 101 toward the direction of installing the ejector tube 20. An ejector tube installation position is formed in the flange structure 102. An air inlet 1011 and an air inlet 1012 are provided on the base plate structure 101. The air inlet is located in the middle of the base plate structure 101, and the air inlet 1012 is located on the outside of the air inlet 1011. The outside referred to here refers to the outside relative to the center of the damper plate 10. The outside is closer to the outer circle relative to the center of the damper plate 10. This ensures a 360° tight fit at the entrance of the damper plate 10 and the ejector tube 20 without a gap. This ensures a tight fit at the entrance of the damper plate and the ejector tube without a gap. Figure 3 , solving the problem of air tightness testing. Compared with existing structures, this damper plate structure is easier to weld, greatly improving production efficiency. In addition, this damper plate structure can be fully welded using a brazing process, further reducing the gap between the damper plate and the ejector tube, which can reduce the difficulty of air tightness testing of the ejector tube.

[0036] refer to Figure 6 The present invention also provides a burner, comprising the damper adjustment device of the gas stove of any of the above embodiments, the ejector tube 20, the flame distributor 40 and the outer ring fire cover 90, the air outlet end of the ejector tube 2040 is connected to the flame distributor, the air inlet end of the ejector tube 20 is connected to the damper plate 10, and the outer ring fire cover 90 is located above the flame distributor 40.

[0037] refer to Figure 7 In a preferred embodiment, the ejector tube 20 includes an ejector tube body 201 and a sleeve 202 in sequence along the direction of gas flow. The wall thickness of the sleeve 202 is greater than that of the ejector tube body 201. The ignition divider 40 has a step portion, and the end face of the sleeve 202 cooperates with the step portion for sealing. 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, which better ensures that there is no leakage between the sleeve 202 and the ignition divider 40. 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 from the fixed bracket 50 can be shortened, and the problem of the difficulty in taking and placing the ignition divider can be solved, avoiding the occurrence of fire leakage and safety accidents if the ignition divider is not put in place. The ignition divider has a simple structure, is sealed with the end face of the burner base, is not prone to leakage, is easy to take and place, and greatly improves user experience and safety performance. The fixed installation method of the flange structure 502 and the sleeve 202 can further prevent air leakage.

[0038] refer to Figure 7In a preferred embodiment, the sleeve 202 extends outward from the fixing bracket 50 by 3mm-8mm. Because the present invention utilizes a thicker sleeve 202, it can effectively solve the problem of gas leakage during assembly with the ignition distributor 40. Furthermore, the 3mm-8mm extension from the fixing bracket 50 further ensures a tight installation seal. The shorter extension also makes it easier to remove and place the ignition distributor.

[0039] refer to Figure 7 In a preferred embodiment, the wall thickness of the sleeve 202 is 1.5 mm to 3 mm. By properly limiting the wall thickness of the sleeve 202, on the one hand, the function of the ejector tube itself is not affected, and on the other hand, the reasonable wall thickness of the sleeve can better achieve a seal between the sleeve 20 and the ignition distributor 40 through the end surface, thereby effectively preventing gas leakage.

[0040] refer to Figure 6 and Figure 8-9 In a preferred embodiment, a plurality of main fire holes 911 are provided at intervals on the circumference of the outer side of the outer wall of the fire cover body of the outer ring fire cover, and a plurality of 4-9 secondary fire holes 912 are provided at the outlet of the outer ejector tube 20b of the outer ring fire cover. The aperture of the secondary fire hole 912 is smaller than the aperture of the main fire hole 911. The outer side surface of the fire cover body has a flame stabilizing groove 92 with an opening facing outward and extending circumferentially. The flame stabilizing groove is located below the main fire hole 911, and a plurality of lower flame stabilizing holes 94 are provided 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 with the flame stabilizing groove 92, and the flame stabilizing groove 92 is connected with the main fire hole 911; a plurality of upper flame stabilizing holes 93 are also provided at intervals on the circumference of the outer wall of the fire cover body, and some adjacent upper flame stabilizing holes 93 are separated from each other by the main fire hole 911 or the secondary fire hole 912.

[0041] The burner provided by the present invention forms a large, stable flame at the main fire hole 911, which is used to heat cooking utensils. The flame stabilization groove 92 is connected to the lower flame stabilization hole 94, forming a small, stable flame at the flame stabilization groove 92. This reduces the probability of flame separation and flashback at the main fire hole and increases the stable combustion range. The upper flame stabilization hole 93 cooperates with the main fire hole 911 to increase the stable combustion range, making it less likely to experience flame separation and flameout. Furthermore, it reignites the unburned gas above the main fire hole 911, improving thermal efficiency and reducing smoke.

[0042] Because the gas outlet speed at the outlet of the external ejector tube 20a is faster and the flame is longer than at other positions, by setting the auxiliary fire hole 912 and reducing the aperture, the gas outlet speed of the fire hole at this location can be reduced, making the fire holes of the entire fire cover burn evenly.

[0043] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0044] 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 damper adjustment device for a gas stove, characterized in that: The air damper comprises an air damper plate and an adjusting piece, wherein the air damper adjusting device has an air inlet and an air regulating outlet which pass through the air damper plate and the adjusting piece, the adjusting piece can rotate relative to the air damper plate, and the adjusting piece has a shielding portion, and when the adjusting piece rotates relative to the air damper plate, the shielding portion can make the air regulating outlet larger or smaller, the air damper plate is connected to the ejector tube on one side and the adjusting piece on the other side, the air damper plate has a flange portion which is flipped up toward the adjusting piece at the air inlet, and the flange portion is folded from the air inlet to the outer peripheral side, and the adjusting piece is limited to the limited space formed by the flange portion.

2. The air door regulating device for a gas stove according to claim 1, characterized in that: The damper plate is provided with a plurality of adjustment holes, and a positioning convex bump is provided on the shielding portion of the adjustment piece. When the adjustment piece rotates relative to the damper plate, the positioning convex bump can be stuck in one of the plurality of adjustment holes.

3. The air door regulating device for a gas stove according to claim 1, wherein: The 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, and an ejector tube installation position is formed in the flange structure.

4. The air door regulating device for a gas stove according to claim 1, wherein: The flange portion includes a first flange and a second flange that are connected to each other. The first flange is flipped up from the bottom plate of the damper plate toward the adjustment plate. The first flange surrounds to form 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.

5. The air door regulating device for a gas stove according to claim 4, characterized in that: The first flange is perpendicular to the bottom plate, and the second flange is perpendicular to the first flange.

6. A burner, characterized in that: It comprises a damper adjustment device of a gas stove as described in any one of claims 1 to 5, an ejector tube, a flame distributor and an outer ring fire cover, the air outlet end of the ejector tube is connected to the flame distributor, the air inlet end of the ejector tube is connected to the damper plate, and the outer ring fire cover is located above the flame distributor.

7. The burner according to claim 6, characterized in that The burner also includes a fixing bracket for fixing the ejector tube, and the ejector tube includes an ejector tube body and a sleeve in sequence along the direction of gas flow. The sleeve is fixed on the fixing bracket and extends outward relative to the fixing bracket. The wall thickness of the sleeve is greater than the wall thickness of the ejector tube body. The ignition divider has a step portion, and the end face of the sleeve cooperates and seals with the step portion.

8. The burner according to claim 7, wherein The length of the sleeve extending outward relative to the fixing bracket is 3mm-8mm.

9. The burner according to claim 7, wherein The sleeve wall thickness is 1.5 mm to 3 mm.

10. The burner according to claim 7, wherein The outer ring fire cover includes a fire cover body, and a plurality of main fire holes are arranged at intervals on the circumference of the outer side of the outer wall of the fire cover body. The outer ring fire cover is provided with a plurality of 4-9 secondary fire holes at the outlet of the outer ejector tube, and the aperture of the secondary fire hole is smaller than the aperture of the main fire hole. The outer side surface of the fire cover body has a flame stabilizing groove with an opening facing outward and extending circumferentially, and the flame stabilizing groove is located below the main fire hole. A plurality of lower flame stabilizing holes are arranged at intervals on the circumference of the inner side of the outer wall of the fire cover body, and the lower flame stabilizing holes are connected with the flame stabilizing groove, and the flame stabilizing groove is connected with the main fire hole; a plurality of upper flame stabilizing holes are also arranged at intervals on the circumference 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 main fire holes or secondary fire holes.

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