Ignition device and stove burner comprising same
By pre-buried the metal energy-concentrating ring in the insulator and optimizing its position, the problem of inconcentration of discharge under the influence of oil pollution is solved, the ignition success rate and breakdown capability of the stove burner are improved, and a more efficient ignition effect is achieved.
Patent Information
- Application Number
- CN202420117681.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-17
AI Technical Summary
The metal energy-concentrating rings in existing stove burners are easily affected by oil stain adhesion, resulting in inconcentration of discharge, weak breakdown ability, and low ignition success rate.
The metal energy-concentration ring is pre-embedded in the insulator, and a reasonable relative position is designed to avoid oil pollution. By controlling the distance between the electrode needle and the metal energy-concentration ring and the position of the connection point, the charge distribution and potential difference are improved to improve the discharge efficiency.
It effectively avoids oil pollution, improves the breakdown capability and success rate of the ignition device, and ensures efficient and reliable ignition of the stove burner.
Smart Images
Figure CN222164892U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an ignition device and a stove burner comprising the ignition device. Background Art
[0002] At present, stove burners mostly use ignition needle pulse discharge to ignite gas. The ignition needle is usually set near the fire outlet of the stove burner. During ignition, the discharge end of the ignition needle generates high voltage electricity, which breaks through the air between the ignition needle and the fire cover to form an arc, thereby igniting the gas ejected from the fire outlet, thus realizing the ignition of the stove burner.
[0003] In order to achieve better ignition effect, a metal energy focusing ring is currently provided on the outer sleeve of the ignition needle. Since the metal energy focusing ring is exposed to the outside, it is easily affected by the adhesion of oil and dirt, resulting in the unconcentrated charge current during discharge and weak breakdown ability, which can easily cause ignition discharge failure and result in a low ignition success rate of the product. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the metal energy-gathering ring sleeved outside the ignition needle is easily affected by the adhesion of oil stains, and to provide an ignition device and a stove burner including the same.
[0005] The utility model solves the above technical problems through the following technical solutions:
[0006] An ignition device is characterized in that it includes an ignition needle and a metal energy focusing ring for grounding, the ignition needle includes an electrode needle and an insulator, the insulator is coated on the electrode needle, the metal energy focusing ring is pre-buried in the insulator, and the metal energy focusing ring surrounds the electrode needle.
[0007] In the present scheme, the above-mentioned structural form is adopted, and the metal energy focusing ring is pre-buried and hidden in the insulator, which not only makes the appearance of the ignition device simpler, but more importantly, the metal energy focusing ring is no longer affected by the adhesion of oil stains, so that the charge current is more concentrated when the ignition needle discharges, the breakdown ability is stronger, and the product ignition success rate is improved.
[0008] Preferably, the metal energy focusing ring is close to the outer side surface of the insulator, and the distance between the metal energy focusing ring and the outer side surface of the insulator is 1-2 mm.
[0009] In this solution, the above structure is adopted, the metal energy-gathering ring is far away from the ignition needle it surrounds, and is close to the outer peripheral surface of the insulator. The closer the metal energy-gathering ring is to the outer peripheral surface of the insulator, the more conducive it is for the charge to be adsorbed on the metal energy-gathering ring and introduced into the grounding terminal. However, considering the high-temperature firing strength and mechanical strength of the insulator, the distance cannot be too small, so the distance between 1-2mm can achieve the ideal effect.
[0010] Preferably, the electrode needle comprises a needle body and a wire, the insulator covers the needle body and the wire, the bottom of the needle body is connected to the top of the wire to form a connection point, and the connection point is located in the metal energy focusing ring.
[0011] In this scheme, the above-mentioned structural form is adopted, and the wire, insulator, and needle body form a discharge system. The needle body provides a high-voltage pulse electric energy terminal device, which can transmit the ignition high voltage to the fire cover, pulse ignite the gas, and thus make the stove burner work normally. The connection point is located in the metal energy-gathering ring. Since the metal energy-gathering rings on both sides of the electrode needle will carry an equal amount of positive charge during ignition, the connection point at this time is similar to being between thin-walled metal plates with equal amounts of the same charge. The electric field in the area is at the same potential, and the electric field strength is equal everywhere. For the needle tip that carries a large amount of positive charge at a high potential during discharge, the potential at the connection point is close to zero, so a potential difference is generated between the needle tip and the connection point, which is more conducive to tip discharge.
[0012] Preferably, the distance between the upper end of the metal energy-gathering ring and the connection point is 3-5 mm;
[0013] And / or, the distance between the lower end of the metal energy focusing ring and the connection point is 3-5 mm.
[0014] When the ignition device ignites, analysis of the discharge pulse waveform shows that the first wave of the pulse is a forward voltage and the high voltage value is the largest, and then the voltage values of the pulse waves decay successively. Therefore, it is easiest to break through the air discharge within the range of the first pulse wave. At this time, the metal energy focusing ring carries a positive charge. In this scheme, the above-mentioned structural form is adopted, and the distance between the upper end of the metal energy focusing ring and the connection point is controlled to be 3-5mm, so as to ensure that the connection point is in the equipotential electric field formed by the metal energy focusing ring, increase the potential difference between the tip of the needle body and the connection point, and improve the charge distribution between the electrode needle and the insulator, thereby improving the ignition energy field distribution, which is more conducive to tip discharge and enables the ignition device to ignite reliably and efficiently. Similarly, the distance between the lower end of the metal energy focusing ring and the connection point is 3-5mm.
[0015] Preferably, the tip of the electrode needle is exposed on the top surface of the insulator, and the distance between the upper end of the metal energy focusing ring and the tip of the electrode needle is not less than 10 mm.
[0016] In this solution, in order to prevent the tip of the electrode needle from directly discharging to the metal energy focusing ring when the needle body releases a high-voltage pulse, thereby affecting normal ignition, the distance between the upper end of the metal energy focusing ring and the tip of the electrode needle is not less than 10 mm.
[0017] Preferably, the outer side surface of the insulator has a boss extending outward, and the bottom surface of the boss is supported and placed on the base of the stove burner.
[0018] In this solution, a boss extending outwards and supporting the base of the stove burner is provided on the outer side surface of the insulator, so that the ignition device is firmly and reliably mounted on the base of the stove burner.
[0019] Preferably, the metal energy focusing ring extends into the boss, and the lower end of the metal energy focusing ring is flush with the bottom surface of the boss, so that the metal energy focusing ring is in contact with the base.
[0020] In this solution, the lower end of the metal energy focusing ring extends all the way to the bottom surface of the boss of the insulator that abuts against the base, ensuring a reliable connection between the metal energy focusing ring and the base, thereby ensuring the grounding discharge stability of the metal energy focusing ring and ensuring the success rate of ignition.
[0021] Preferably, the insulator is made of A95 ceramic.
[0022] In this scheme, because the insulator works in a high temperature environment, the insulator should have the characteristic of high temperature resistance. In addition, the ignition device ignites through high-voltage pulse discharge, so the insulator should also have the characteristic of high voltage resistance. In addition, the mechanical strength and acid and alkali corrosion resistance of the insulator should also be considered. A95 ceramics have the excellent characteristics of high temperature resistance, good electrical insulation performance at high temperature, high mechanical strength, wear resistance, and strong acid and alkali corrosion resistance.
[0023] Preferably, the metal energy focusing ring is made of copper alloy or stainless steel.
[0024] In this solution, the metal energy ring is made of copper alloy or stainless steel in consideration of strength, corrosion resistance, processing difficulty, aesthetics, cost and other issues.
[0025] A stove burner comprises the ignition device as described above.
[0026] In the present scheme, the above-mentioned structural form is adopted, and the metal energy focusing ring is pre-buried in the insulator to form an integrated structure, thereby avoiding the influence of oil pollution on the metal energy focusing ring. In addition, the lower end of the metal energy focusing ring is in contact with the base to ensure the normal grounding discharge of the metal energy focusing exchanger. In addition, the distance between the upper and lower ends of the metal energy focusing ring and the connection points of the needle body and its wires, the distance between the metal energy focusing ring and the outer peripheral surface of the insulator, and the upper end of the metal energy focusing ring and the tip of the electrode needle are controlled. These relative position designs increase the potential difference between the tip of the needle body and the connection point, improve the charge distribution between the electrode needle and the insulator, thereby improving the ignition energy field distribution, and are more conducive to tip discharge. The above structural designs ensure efficient and reliable ignition of the ignition device.
[0027] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.
[0028] The positive and progressive effects of the utility model are:
[0029] The ignition device of the utility model and the stove burner including the same, by pre-burying the metal energy gathering ring in the insulator to form an integrated structure, avoids the influence of oil pollution of the metal energy gathering ring. In addition, the lower end of the metal energy gathering ring is in contact with the base to ensure the normal grounding discharge of the metal energy gathering ring. At the same time, the distance between the upper and lower ends of the metal energy gathering ring and the connection point of the needle body and its wire is 3-5mm, and the metal energy gathering ring is close to the outer peripheral surface of the insulator, with a distance of 1-2mm. These relative position designs increase the potential difference between the tip of the needle body and the connection point, improve the charge distribution between the electrode needle and the insulator, thereby improving the ignition energy field distribution, and are more conducive to tip discharge. In addition, the spacing between the upper end of the metal energy gathering ring and the tip of the electrode needle is not less than 10mm, which avoids the tip of the electrode needle directly discharging to the metal energy gathering ring when the needle body releases a high-voltage pulse, thereby affecting normal ignition. The above structural designs greatly improve the ignition success rate of the ignition device. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 The figure is a schematic diagram of the structure of a stove burner according to an embodiment of the utility model.
[0031] Figure 2 The figure is a partial internal schematic diagram of a stove burner according to an embodiment of the present utility model.
[0032] Figure 3 The figure is a schematic diagram of the internal structure of the ignition device according to the embodiment of the utility model.
[0033] Description of reference numerals:
[0034] Ignition needle 1
[0035] Electrode needle 11
[0036] Needle 111
[0037] Wire 112
[0038] Connection point 113
[0039] Insulator 12
[0040] Boss 123
[0041] Metal Energy Ring 2
[0042] Base 30 DETAILED DESCRIPTION
[0043] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.
[0044] like Figure 1 , Figure 2 and Figure 3 As shown, the embodiment of the utility model discloses a stove burner, which includes an ignition device and a base 30. The ignition device is installed on the base 30 and realizes ignition through high-voltage pulse discharge. The ignition device includes an ignition needle 1 and a metal energy-gathering ring 2 for grounding. The ignition needle 1 includes an electrode needle 11 and an insulator 12. The insulator 12 is coated on the electrode needle 11. The metal energy-gathering ring 2 is pre-buried in the insulator 12, and the metal energy-gathering ring 2 surrounds the electrode needle 11.
[0045] By pre-burying the metal energy focusing ring 2 in the insulator 12, the metal energy focusing ring 2 is effectively isolated from being polluted by impurities such as oil, so that the metal energy focusing ring 2 can efficiently perform its grounding discharge function and ensure the success rate of discharge ignition of the ignition device.
[0046] In this embodiment, if Figure 2 , Figure 3 As shown, in order to prevent impurities such as oil from contaminating the insulator 12 and affecting its grounding discharge function, a metal energy focusing ring 2 is pre-placed in the mold for manufacturing the insulator 12, and then fired at high temperature to make them integrated. The metal energy focusing ring 2 is completely hidden in the insulator 12. This design structure ensures the cleanliness of the metal energy focusing ring 2, so that it can discharge efficiently and reliably. In addition, this hidden structure also makes the overall appearance of the ignition device more concise.
[0047] The metal energy-gathering ring 2 is close to the outer side of the insulator 12, and the distance between the metal energy-gathering ring 2 and the outer side of the insulator 12 is 1-2 mm. The closer the metal energy-gathering ring 2 is to the outer peripheral surface of the insulator 12, the more conducive it is for the metal energy-gathering ring 2 to absorb the charges on the outer peripheral surface of the insulator 12 and introduce them to the ground terminal. However, considering the high-temperature firing strength and mechanical strength of the insulator 12, the deviation distance cannot be too small, so the distance is set to 1-2 mm. In this embodiment, if Figure 2 , Figure 3 As shown, the metal energy focusing ring 2 is equidistantly offset from the outer peripheral surface D of the insulator 12 and is pre-buried in the insulator 12, and D is 1.5 mm. The distance between the outer surface of the metal energy focusing ring 2 and the outer peripheral surface of the insulator 12 is conducive to the adsorption of charges onto the metal energy focusing ring 2, and ensures the high-temperature firing strength and mechanical strength of the insulator 12.
[0048] The electrode needle 11 includes a needle body 111 and a wire 112. The insulator 12 is coated on the needle body 111 and the wire 112. The bottom of the needle body 111 is connected to the top of the wire 112 to form a connection point 113. The connection point 113 is located in the metal energy focusing ring 2. Since the metal energy focusing rings 2 on both sides of the electrode needle 11 will carry an equal amount of positive charge during ignition, when the connection point 113 is located in the metal energy focusing ring 2, the connection point 113 at this time is similar to being between thin-walled metal plates with equal amounts of the same charge. The electric field in the area is at an equipotential, the electric field strength is equal everywhere, and the potential at the connection point 113 is close to zero, thereby generating a potential difference between the tip of the needle body 111 and the connection point 113, which is more conducive to tip discharge. In this embodiment, Figure 2 , Figure 3 As shown, the needle body 111 and the wire 112 are firmly connected together by welding, and their welding point is the connection point 113. This welding point is located between the upper and lower ends of the metal energy focusing ring 2, that is, the welding point is surrounded by the metal energy focusing ring 2. With this position arrangement, an electric potential difference is generated between the tip of the needle body 111 and the welding point, which is more conducive to tip discharge and improves the ignition success rate.
[0049] The distance between the upper end of the metal energy gathering ring 2 and the connection point 113 is 3-5 mm. The distance between the lower end of the metal energy gathering ring 2 and the connection point 113 is 3-5 mm. When the ignition device ignites, analysis of the waveform of the sinusoidal discharge pulse shows that the first wave of the pulse is a positive voltage and has the largest high voltage value, and the voltage values of the subsequent pulse waves decay in sequence. Therefore, it is easiest to break through the air discharge within the range of the first pulse wave. At this time, the metal energy focusing ring 2 carries a positive charge, and the internal electric field of the entire metal energy focusing ring 2 is similar to a thin-walled metal plate with an equal amount of the same charge. The electric field in the region is at an equipotential, and the electric field strength is equal everywhere. Relative to the electric field at the tip of the needle body 111, which carries a large amount of positive charge and is at a high potential, the electric potential inside the metal energy focusing ring 2 is almost zero. The distance between the upper end of the metal energy focusing ring 2 and the connection point 113 is 3-5mm, ensuring that the connection point 113 is located in the equipotential electric field of the metal energy focusing ring 2, that is, ensuring that the electric field at the connection point 113 is also close to zero, thereby increasing the potential difference between the tip of the needle body 111 and the connection point 113. In this embodiment, Figure 3 As shown, by controlling the distance H1 between the upper end of the metal energy focusing ring 2 and the connection point 113 to be 3-5mm, the connection point 113 is surrounded by the electric field of the metal energy focusing ring 2, thereby improving the charge distribution between the electrode needle 11 and the insulator 12, thereby improving the ignition energy field distribution, being more conducive to tip discharge, and enabling the ignition device to ignite reliably and efficiently. Similarly, the distance H2 between the lower end of the metal energy focusing ring 2 and the connection point 113 is 3-5mm.
[0050] The tip of the electrode needle 11 is exposed on the top surface of the insulator 12 , and the distance between the upper end of the metal energy focusing ring 2 and the tip of the electrode needle 11 is not less than 10 mm.
[0051] In order to prevent the tip of the electrode needle 11 from directly discharging to the metal energy-gathering ring 2 when the needle body 111 releases a high-voltage pulse, thereby affecting normal ignition, the distance between the upper end of the metal energy-gathering ring 2 and the tip of the electrode needle 11 is not less than 10 mm. Figure 3 As shown, in this embodiment, the metal energy focusing ring 2 is arranged below the tip of the electrode needle 11 at a straight-line distance L of 10 mm. This distance avoids the tip creepage phenomenon of the electrode needle 11 and ensures the ignition stability of the ignition device.
[0052] The outer side surface of the insulator 12 has a boss 123 extending outward, and the bottom surface of the boss 123 is supported and placed on the base 30 of the stove burner. Figure 2 , Figure 3 As shown, a cylindrical boss 123 extending outward is provided on the outer side of the insulator 12, and the boss 123 is placed on the base 30 of the stove burner, so that the ignition device is firmly and reliably mounted on the base 30 of the stove burner.
[0053] The metal energy focusing ring 2 extends into the boss 123 , and the lower end of the metal energy focusing ring 2 is flush with the bottom surface of the boss 123 , so that the metal energy focusing ring 2 is in contact with the base 30 .
[0054] In order to ensure that the metal energy-gathering ring 2 is reliably connected to the base 30, the lower end of the metal energy-gathering ring 2 should be flush with the bottom surface of the boss 123 of the insulator 12 and cannot be sunken inside the boss 123. Figure 2 , Figure 3 As shown, in the present embodiment, the lower end of the metal energy gathering ring 2 is a vertical bending structure that adapts to the outward and downward direction of the boss 123 and extends to the bottom surface of the boss 123. Of course, in other embodiments, the lower end of the metal energy gathering ring can also be a structure that directly tilts outward and downward to the bottom surface of the boss 123. This design structure ensures the grounding discharge stability of the metal energy gathering ring 2 and ensures the success rate of ignition.
[0055] The material of the insulator 12 is A95 ceramic. Considering the working environment requirements of the insulator 12, the insulator 12 should have the characteristics of high temperature resistance, good electrical insulation performance at high temperature, high mechanical strength, wear resistance, acid and alkali resistance and other corrosion resistance, and A95 ceramic just has the above excellent characteristics. In addition, A95 ceramic also has the advantages of thermal stability and good finish.
[0056] The metal energy gathering ring 2 is made of copper alloy or stainless steel. Due to the need to meet the requirements of strength, corrosion resistance, ease of processing, aesthetics, cost, etc., the metal energy gathering ring 2 is made of copper alloy or stainless steel. In this embodiment, in order to obtain better electrical conductivity, the metal energy gathering ring 2 is made of copper alloy.
[0057] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.
Claims
1. An ignition device, characterized in that: It includes an ignition needle and a metal energy-gathering ring for grounding. The ignition needle includes an electrode needle and an insulator. The insulator is coated on the electrode needle. The metal energy-gathering ring is pre-buried in the insulator and surrounds the electrode needle.
2. The ignition device according to claim 1, characterized in that: The metal energy focusing ring is close to the outer side surface of the insulator, and the distance between the metal energy focusing ring and the outer side surface of the insulator is 1-2 mm.
3. The ignition device according to claim 1, characterized in that: The electrode needle comprises a needle body and a wire, the insulator covers the needle body and the wire, the bottom of the needle body is connected to the top of the wire to form a connection point, and the connection point is located in the metal energy focusing ring.
4. The ignition device according to claim 3, characterized in that: The distance between the upper end of the metal energy-gathering ring and the connection point is 3-5 mm; And / or, the distance between the lower end of the metal energy focusing ring and the connection point is 3-5 mm.
5. The ignition device according to claim 1, characterized in that: The tip of the electrode needle is exposed on the top surface of the insulator, and the distance between the upper end of the metal energy focusing ring and the tip of the electrode needle is not less than 10 mm.
6. The ignition device according to claim 1, characterized in that: The outer side surface of the insulator is provided with a boss extending outwards, and the bottom surface of the boss is supported and placed on the base of the stove burner.
7. The ignition device according to claim 6, characterized in that The metal energy focusing ring extends into the boss, and the lower end of the metal energy focusing ring is flush with the bottom surface of the boss, so that the metal energy focusing ring is in contact with the base.
8. The ignition device according to claim 1, characterized in that: The insulator is made of A95 ceramic.
9. The ignition device according to claim 1, characterized in that: The metal energy-gathering ring is made of copper alloy or stainless steel.
10. A stove burner, characterized in that: It comprises an ignition device as claimed in any one of claims 1-9.