Ignition needle assembly and combustor comprising the same

Abstract

The utility model provides a kind of ignition needle assembly and including its combustor, the ignition needle assembly includes ignition needle, furnace head and load guiding structure, furnace head includes gas mixing chamber and is set on the fire cover of gas mixing chamber, the top of fire cover is provided with protruding flange that extends horizontally, ignition needle includes the discharge end for discharging with protruding flange, load guiding structure is set on the outer wall surface of gas mixing chamber, the minimum distance between load guiding structure and ignition needle is d, d <2mm, the minimum distance between load guiding structure and discharge end is h, h <10mm.The combustor includes the ignition needle assembly as above.The ignition needle assembly is set gap between load guiding structure and ignition needle, utilize the thermal expansion when load guiding structure is heated to make load guiding structure contact ignition needle to guide away static charge, if gap is too large to cause thermal expansion to also not contact, so control gap to be within 2mm.Load guiding structure is not directly contacted with ignition needle when cold shrink, reduce the possibility of mechanical damage to ignition needle.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to an ignition needle assembly and a burner including the same. Background Technology

[0002] The ignition needle of a gas stove has a discharge tip that breaks down the gas between itself and the burner rim to create a path for ignition. However, over time, the ignition needle is prone to becoming covered in grease. This grease, acting as an insulating medium, adheres to the discharge tip and significantly increases the breakdown voltage threshold of the gas medium between the tip and the rim. As the grease layer thickens, the actual electric field strength at the discharge tip weakens due to charge diffusion, causing the operating voltage to fail to reach the critical value required to break down the gas, thus leading to discharge failure.

[0003] To overcome the aforementioned shortcomings, conventional technology employs a structure that adds a metal energy-concentrating ring around the ignition needle. This metal ring conducts the charge on the needle surface, forcing the discharge energy to concentrate at the discharge tip, thereby increasing the instantaneous voltage intensity at the discharge tip and thus improving the discharge success rate. In existing burners that improve ignition needle discharge, another method involves adding a metal spring around the ignition needle, with the spring having an upward-extending needle tip for electrostatic shielding. This approach places the metal spring and needle tip not in the ignition area, but rather on one side of the ignition needle, reducing the impact of environmental static electricity on the ignition needle discharge. In other words, by adding a protective device, the anti-interference capability is improved, thereby increasing the ignition success rate.

[0004] However, the complex structure of the condenser coil and the embedded metal spring is inconvenient to install, requiring additional structures on the ignition needle. Adding the condenser coil increases costs and incurs additional expenses. Furthermore, it significantly impacts the appearance, compromising the overall aesthetics. In addition, the voltage boost at the tip is greatly affected by oil contamination; when the tip is completely covered by oil, charge still dissipates along the surface of the contaminant, significantly attenuating the electric field enhancement effect and resulting in a low ignition success rate. When the burner is subjected to vibration, the metal spring may shift, deform, or even come into contact with the ignition needle or grounding components, causing a permanent short circuit and completely disabling the ignition function. Therefore, the mechanical stability of the metal spring is poor. Moreover, the spring structure is not effective at electrostatic shielding. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defect of low ignition success rate in the prior art, and to provide an ignition needle assembly and a burner including the same.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This embodiment provides an ignition needle assembly, which includes an ignition needle, a burner head, and a grounded load-conducting structure. The burner head includes a mixing chamber and a flame cap disposed on the mixing chamber. The top of the flame cap has a laterally extending protruding edge. The ignition needle includes a discharge end for discharging with the protruding edge. The load-conducting structure is disposed on the outer wall surface of the mixing chamber. The minimum distance between the load-conducting structure and the ignition needle is d, where d < 2 mm. The minimum distance between the load-conducting structure and the discharge end is h, where h < 10 mm.

[0008] In this design, the ignition needle assembly uses a gap between the load-conducting structure and the outer wall of the ignition needle. The load-conducting structure expands under heat, causing it to contact the ignition needle and dissipate its static charge. If the gap is too large, it may not make contact during thermal expansion; therefore, the gap needs to be controlled within 2mm. During cooling and contraction, the load-conducting structure does not directly contact the ignition needle, reducing the possibility of mechanical damage. Furthermore, since static charge tends to accumulate at the discharge end of the ignition needle head, placing the load-conducting structure close to this end improves the efficiency of dissipating static charge, thereby increasing the ignition success rate.

[0009] Preferably, the load-guiding structure is a metal column that extends from the bottom to the top of the mixing chamber.

[0010] In this scheme, the above-mentioned structure is used to specifically achieve the removal of electrostatic charge by the load-conducting structure.

[0011] Preferably, the mixing chamber and the load-conducting structure are integrally formed.

[0012] In this solution, the structural strength of the load-conducting structure is improved by the above-mentioned settings, and the impact of mechanical vibration on the distance between the load-conducting structure and the ignition needle is reduced.

[0013] Preferably, the top of the load-conducting structure is a plane.

[0014] In this design, the above-mentioned arrangement facilitates the avoidance of the fire holes above the load-guiding structure.

[0015] Preferably, the surface of the load-conducting structure facing the ignition needle is a plane.

[0016] In this design, the above-mentioned settings facilitate the avoidance of the ignition needle.

[0017] Preferably, the minimum distance d between the load-conducting structure and the ignition needle satisfies d > 0.2 mm.

[0018] In this solution, the above-mentioned settings prevent interference between the load-conducting structure and the ignition needle during thermal expansion.

[0019] Preferably, the distance between the top of the load-guiding structure and the top of the mixing chamber is b, where 0 < b < 3 mm.

[0020] In this scheme, the maximum breakdown voltage can be reduced as long as the distance between the load-conducting structure and the top of the mixing chamber is within the above range.

[0021] Preferably, the distance b between the top of the load-guiding structure and the top of the mixing chamber is 2 mm.

[0022] In this scheme, the maximum breakdown voltage is reduced most effectively when the distance between the load-conducting structure and the top of the mixing chamber is 2mm.

[0023] Preferably, the width of the load-conducting structure is c, where 2 < c < 5 mm.

[0024] In this scheme, the strength of the load-conducting structure is guaranteed through the above-mentioned settings.

[0025] This embodiment also provides a burner that includes the ignition needle assembly described above.

[0026] In this design, the ignition needle assembly uses a gap between the load-conducting structure and the outer wall of the ignition needle. The load-conducting structure expands under heat, causing it to contact the ignition needle and dissipate its static charge. If the gap is too large, it may not make contact during thermal expansion; therefore, the gap needs to be controlled within 2mm. During cooling and contraction, the load-conducting structure does not directly contact the ignition needle, reducing the possibility of mechanical damage. Furthermore, since static charge tends to accumulate at the discharge end of the ignition needle head, placing the load-conducting structure close to this end improves the efficiency of dissipating static charge, thereby increasing the ignition success rate.

[0027] The positive and progressive effects of this utility model are as follows:

[0028] This invention provides an ignition needle assembly and a burner including the assembly. A gap is created between the load-conducting structure and the outer wall of the ignition needle. The load-conducting structure expands under heat, causing it to contact the ignition needle and dissipate static charge. If the gap is too large, contact will be impossible during thermal expansion; therefore, the gap needs to be controlled within 2mm. During cooling and contraction, the load-conducting structure does not directly contact the ignition needle, reducing the possibility of mechanical damage. Furthermore, since static charge tends to accumulate at the discharge end of the ignition needle head, placing the load-conducting structure close to this end improves the efficiency of dissipating static charge, thereby increasing the ignition success rate. Attached Figure Description

[0029] Figure 1 This is one of the perspective views of the ignition needle assembly according to an embodiment of the present utility model.

[0030] Figure 2 This is a second perspective view of the ignition needle assembly according to an embodiment of the present utility model.

[0031] Figure 3 This is a perspective view of the ignition needle assembly of this utility model embodiment without the ignition needle.

[0032] Figure 4 This is a side view of the ignition needle assembly according to an embodiment of the present invention.

[0033] Figure 5 for Figure 4 A magnified view of a portion of region A in the middle.

[0034] Explanation of reference numerals in the attached figures:

[0035] Ignition needle assembly 1000

[0036] Ignition needle 1

[0037] Stove 2

[0038] Base 3

[0039] Load-conducting structure 4

[0040] Mixing chamber 5

[0041] Fire cap 6

[0042] 7-inch flange

[0043] Discharge terminal 8

[0044] Fire hole 9 Detailed Implementation

[0045] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0046] like Figures 1 to 5 As shown, this embodiment provides an ignition needle assembly 1000, which includes an ignition needle 1, a burner head 2, a base 3, and a load-conducting structure 4, as follows. Figure 1 As shown, the ignition needle 1, the burner head 2, and the load-conducting structure 4 are mounted on the base 3, which is grounded. The burner head 2 includes a mixing chamber 5 and a flame cap 6 mounted on the mixing chamber 5. The top of the flame cap 6 has a laterally extending flange 7, and multiple flame outlet holes 9 are formed on the circumferential sidewalls of the flame cap 6. Among the flame outlet holes 9 is an ignition hole located below the flange 7, such as... Figure 2 As shown, the ignition needle 1 includes a discharge end 8 for discharging with the raised edge 7. The discharge end 8 is used to discharge and break down the air between the discharge end 8 and the raised edge 7, thereby igniting the combustion gas in the ignition hole. Figure 1 and Figure 2 As shown, the load-guiding structure 4 is disposed on the outer wall surface of the mixing chamber 5, such as... Figure 5As shown, the minimum distance between the load-conducting structure 4 and the ignition needle 1 is d, where d < 2mm. The ignition needle assembly 1000 uses a gap between the load-conducting structure 4 and the outer wall of the ignition needle 1. The load-conducting structure 4 expands under heat, causing it to contact the outer wall of the ignition needle 1 and dissipate the electrostatic charge. If the gap is too large, it will not make contact during thermal expansion; therefore, the gap needs to be controlled within 2mm. During cooling and contraction, the load-conducting structure 4 does not directly contact the ignition needle 1, reducing the possibility of mechanical damage. Figure 5 As shown, the minimum distance between the charge-conducting structure 4 and the discharge end 8 is h, where h < 10 mm. Static charge tends to accumulate at the discharge end 8 of the ignition needle 1. Bringing the charge-conducting structure 4 closer to the discharge end 8 of the ignition needle 1 can improve the efficiency of dispersing the static charge from the head of the ignition needle 1, thereby increasing the ignition success rate of the ignition needle 1.

[0047] In this embodiment, the minimum distance d between the load-conducting structure 4 and the ignition needle 1 further satisfies d > 0.2 mm.

[0048] Thus, the above settings prevent interference between the load-conducting structure 4 and the ignition needle 1 due to insufficient spacing during thermal expansion.

[0049] Specifically, such as Figure 3 As shown, the load-conducting structure 4 is a metal column that extends from the bottom to the top of the mixing chamber 5. This structure effectively conducts electrostatic charge away from the load. The metal column can be designed separately from the outer wall of the mixing chamber 5 or integrally formed. In this embodiment, the mixing chamber 5 and the metal column are integrally formed. This design improves the structural strength of the load-conducting structure 4 and reduces the impact of mechanical vibration on the distance between the load-conducting structure 4 and the ignition needle 1. The metal column protrudes laterally from the outer wall of the mixing chamber 5 and extends towards the ignition needle 1.

[0050] Furthermore, such as Figure 3 As shown, the top of the load-guiding structure 4 is a plane.

[0051] Thus, the above-mentioned arrangement facilitates the avoidance of the fire outlet 9 above the load guiding structure 4.

[0052] In this embodiment, rounded corners are provided around the plane to prevent scratches. In other embodiments, the top of the load-conducting structure 4 can also be a turbulence structure with a pointed tip, the end closer to the convex edge 7 being the pointed tip and the end farther from the convex edge 7 being the distal end, with the cross-sectional area gradually increasing from the pointed tip to the distal end. Since the strength of the electric field is related to the radius of curvature of the discharge or receiving end, the smaller the radius of curvature, the higher the electric field strength. Therefore, this turbulence structure gradually increases the cross-sectional area to form a pointed tip with a smaller radius of curvature, thereby enhancing the strength of the auxiliary electric field between the discharge end 8 and the turbulence structure. This further increases the strength and non-uniformity of the main electric field when superimposed with the main electric field, thereby further improving the ignition success rate.

[0053] Specifically, such as Figure 3 and Figure 5 As shown, the surface of the load-guiding structure 4 facing the ignition needle 1 is flat. This arrangement facilitates the avoidance of the ignition needle 1. It also facilitates the integral manufacturing of the mixing chamber 5 and the metal column.

[0054] In other embodiments, the surface of the load-conducting structure 4 facing the ignition needle 1 is an arc surface, which has an arc that conforms to the outer wall surface of the ignition needle 1.

[0055] Specifically, such as Figure 5 As shown, the distance between the top of the load-guiding structure 4 and the top of the mixing chamber 5 is b, where 0 < b < 3 mm.

[0056] Thus, the maximum breakdown voltage can be reduced within the aforementioned range by maintaining the distance between the load-conducting structure 4 and the top of the mixing chamber 5.

[0057] In this embodiment, the distance b between the top of the load-conducting structure 4 and the top of the mixing chamber 5 is 2mm. Thus, when the distance between the load-conducting structure 4 and the top of the mixing chamber 5 is 2mm, the effect of reducing the maximum breakdown voltage is optimal.

[0058] Specifically, such as Figure 3 As shown, the width of the load-carrying structure 4 is c, where 2 < c < 5 mm.

[0059] Thus, the strength of the load-carrying structure 4 is guaranteed through the above settings.

[0060] In this embodiment, preferably, the width of the load-guiding structure 4 is less than 0.7 times the radial width of the ignition needle 1, so that the load-guiding structure 4 and the ignition needle 1 can maintain a suitable ratio and avoid excessive volume change of the load-guiding structure 4 from damaging the ignition needle 1.

[0061] This embodiment also provides a burner, which includes the ignition needle assembly 1000 as described above.

[0062] Thus, the ignition needle assembly 1000 has a gap between the load-conducting structure 4 and the outer wall of the ignition needle 1. The load-conducting structure 4 expands under heat, causing it to contact the ignition needle 1 and dissipate its static charge. If the gap is too large, it will not make contact during thermal expansion; therefore, the gap needs to be controlled within 2mm. During cooling and contraction, the load-conducting structure 4 does not directly contact the ignition needle 1, reducing the possibility of mechanical damage. Furthermore, since static charge tends to accumulate at the discharge end 8 of the ignition needle 1, bringing the load-conducting structure 4 closer to the discharge end 8 improves the efficiency of dissipating static charge from the ignition needle 1's head, thereby increasing the ignition success rate of the ignition needle 1.

[0063] The burner can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the burner to perform corresponding operations, thereby realizing intelligent control of ignition on and off and improving the user experience.

[0064] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An ignition needle assembly, characterized in that, The ignition needle assembly includes an ignition needle, a burner head, and a grounded load-conducting structure. The burner head includes a mixing chamber and a flame cap disposed on the mixing chamber. The top of the flame cap has a laterally extending protruding edge. The ignition needle includes a discharge end for discharging with the protruding edge. The load-conducting structure is disposed on the outer wall surface of the mixing chamber. The minimum distance between the load-conducting structure and the ignition needle is d, where d < 2 mm. The minimum distance between the load-conducting structure and the discharge end is h, where h < 10 mm.

2. The ignition needle assembly as described in claim 1, characterized in that, The load-guiding structure is a metal column that extends from the bottom to the top of the mixing chamber.

3. The ignition needle assembly as described in claim 1, characterized in that, The gas mixing chamber and the load-conducting structure are integrally formed.

4. The ignition needle assembly as described in claim 1, characterized in that, The top of the load-conducting structure is a plane.

5. The ignition needle assembly as described in claim 1, characterized in that, The surface of the load-conducting structure facing the ignition needle is a plane.

6. The ignition needle assembly as described in claim 1, characterized in that, The minimum distance d between the load-conducting structure and the ignition needle satisfies d > 0.2 mm.

7. The ignition needle assembly as described in claim 1, characterized in that, The distance between the top of the load-guiding structure and the top of the mixing chamber is b, where 0 < b < 3 mm.

8. The ignition needle assembly as described in claim 7, characterized in that, The distance b between the top of the load-guiding structure and the top of the mixing chamber is 2mm.

9. The ignition needle assembly as claimed in claim 1, characterized in that, The width of the load-conducting structure is c, where 2 < c < 5 mm.

10. A burner, characterized in that, It includes the ignition needle assembly as described in any one of claims 1-9.

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