Ignition device and stove burner comprising same

Abstract

The ignition device comprises an ignition needle and a metal energy-gathering ring used for being grounded, the ignition needle comprises an electrode needle and an insulator, the insulator wraps the electrode needle, the metal energy-gathering ring comprises a metal energy-gathering ring body and a grounding end, the metal energy-gathering ring body is connected with the metal energy-gathering ring body, and the grounding end is connected with the metal energy-gathering ring body. The metal energy-gathering ring body is embedded in the insulator and surrounds the ignition needle, the grounding end is connected to the bottom of the metal energy-gathering ring body, and the grounding end is exposed out of the insulator and used for supporting and abutting against a base. The stove burner comprises the ignition device. Due to the fact that the metal energy-gathering ring body is hidden in the insulator, the metal energy-gathering ring body is not affected by attachment of greasy dirt any more, in addition, the grounding end can ensure that the metal energy-gathering ring is reliably grounded, charge current is more concentrated during discharging, the breakdown capacity is higher, and the success rate of product ignition is increased.

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, most household gas stoves use ignition needle pulse discharge to ignite gas. The ignition needle is usually set near the burner fire hole of the gas stove. 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 hole and realizing the ignition of the gas stove.

[0003] In order to achieve a better ignition effect, a metal energy focusing ring is currently provided on the outer sleeve of the ignition needle. However, in the existing technology, the metal energy focusing ring is provided on the outer peripheral surface of the ignition needle insulator and is exposed to the outside, making it susceptible to the adhesion of oil stains. In addition, since the metal energy focusing ring is generally a part with a smaller wall thickness, its contact area with the base of the stove burner is smaller, and reliable grounding cannot be guaranteed. In addition, oil stains can easily penetrate through the gap between the base and the metal energy focusing ring, resulting in 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 comprises an ignition needle and a metal energy focusing ring for grounding, the ignition needle comprises an electrode needle and an insulator, the insulator is coated on the electrode needle, the metal energy focusing ring comprises a metal energy focusing ring body and a grounding end, the metal energy focusing ring body is pre-buried in the insulator, and the metal energy focusing ring body surrounds the ignition needle, the grounding end is connected to the bottom of the metal energy focusing ring body, the grounding end is exposed from the insulator and is used to support against a base.

[0007] In the present scheme, the above-mentioned structural form is adopted, and the metal energy focusing ring body is pre-buried and hidden in the insulator, which not only makes the appearance of the ignition device more concise, but more importantly, the metal energy focusing ring is no longer affected by the adhesion of oil and dirt. In addition, a grounding terminal supported against the base is provided at the bottom of the metal energy focusing ring body to ensure that the metal energy focusing ring is reliably grounded and discharged. The above structural design makes the charge current more concentrated when the ignition needle discharges, and the breakdown ability is stronger, thereby improving the product ignition success rate.

[0008] Preferably, the grounding end extends outwardly along the radial direction of the ignition needle and abuts against the top surface of the base.

[0009] In this scheme, in order to ensure that the metal energy focusing ring has sufficient contact area with the base, thereby ensuring that the metal energy focusing ring can reliably and efficiently ground and discharge, the grounding end located at the bottom of the metal energy focusing ring body is extended radially outward along the ignition needle, and the lower surface of the grounding end is abutted against the top surface installed on the base.

[0010] Preferably, the outer side surface of the insulator has a boss extending outward, and the grounding end is pressed between the bottom surface of the boss and the top surface of the base.

[0011] In the present scheme, in order to better install the ignition device on the base, an outwardly extending boss supported on the base is provided on the outer side surface of the insulator, and the grounding end which is connected to the bottom of the metal energy focusing ring body embedded in the insulator and exposed from the insulator is pressed between the bottom surface of the boss and the top surface of the base. By utilizing the axial pressure between the ignition device and the base, on the one hand, the grounding end can be reliably contacted with the base, and on the other hand, the lower surface of the grounding end and the top surface of the base can also be subjected to the axial pressure to form a sealing surface, thereby preventing oil from entering between the ignition needle and the stove burner, thereby ensuring reliable ignition.

[0012] Preferably, the grounding end is flush with the outer side surface of the boss.

[0013] In this scheme, in order to ensure that the grounding terminal has sufficient area to contact the base, and at the same time consider that if the boundary of the grounding terminal extends to the outside of the boss of the insulator, the oil stains dripping on the ignition device are likely to penetrate into the space between the grounding terminal and the boss along the upper surface of the grounding terminal exposed outside the boss, affecting the normal ignition of the ignition device, the grounding terminal is set to be flush with the outer side surface of the boss.

[0014] Preferably, the metal energy focusing ring further includes a snap-on portion, which is pre-buried in the insulator, one end of which is connected to the top of the metal energy focusing ring body, and the other end of which extends radially inwardly along the ignition needle.

[0015] In this solution, in order to prevent the metal energy focusing ring from falling off from the insulator and to make the metal energy focusing ring more firmly installed in the insulator, a buckle portion extending radially inward along the ignition needle and embedded in the insulator is provided at the top of the metal energy focusing ring body.

[0016] Preferably, the metal energy focusing ring body is close to the outer side surface of the insulator, and the distance between the metal energy focusing ring body and the outer side surface of the insulator is 1-2 mm.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Preferably, the distance between the upper end of the metal energy focusing ring body and the connection point is 3-5 mm;

[0021] And / or, the distance between the lower end of the metal energy focusing ring body and the connection point is 3-5 mm.

[0022] In the present scheme, 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 the present 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 that the connection point is in the equipotential electric field formed by the metal energy focusing ring, and the potential difference between the tip of the needle body and the connection point is increased, and the charge distribution between the electrode needle and the insulator is improved, 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.

[0023] A stove burner comprises the ignition device as described above.

[0024] In the present scheme, the above-mentioned structural form is adopted, and the metal energy focusing ring body is pre-buried in the insulator to form an integrated structure, thereby avoiding the metal energy focusing ring from being contaminated by oil pollution. At the same time, a grounding terminal is set at the bottom end of the metal energy focusing ring body to be in contact with the base to ensure the normal grounding and discharge of the metal energy focusing ring. 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, and the distance between the metal energy focusing ring body and the outer peripheral surface of the insulator 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 being more conducive to tip discharge. The above structural designs ensure efficient and reliable ignition of the ignition device.

[0025] Preferably, the stove burner further comprises a base, the top surface of the base is provided with an upwardly protruding mounting boss, the ignition needle is passed through the mounting boss, and the grounding end abuts against and contacts the top surface of the mounting boss.

[0026] In the present solution, an upwardly protruding mounting boss is provided on the base through which the ignition needle of the stove burner is penetrated, and the grounding end of the ignition device is in contact with the top surface of the boss. The design of the mounting boss can ensure that even if there is a large amount of oil stains and overflowing liquid on the ignition device, the oil stains and overflowing liquid can flow along the ignition device to the stove burner and will not accumulate on the ignition device, thereby ensuring that the ignition device can discharge and ignite normally.

[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, prevent the metal energy gathering ring from being polluted by oil by pre-burying the metal energy gathering ring body in the insulator, and at the same time, a grounding end abutting against the base is arranged at the bottom end of the metal energy gathering ring body 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 at 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, a mounting boss is arranged on the base of the stove burner to ensure that oil and overflow will not accumulate on the ignition device. 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 121

[0041] Metal Energy Ring 2

[0042] Metal energy ring body 21

[0043] Ground terminal 22

[0044] Buckle portion 23

[0045] Base 30

[0046] Mounting boss 301 DETAILED DESCRIPTION

[0047] 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.

[0048] 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 includes a metal energy-gathering ring body 21 and a grounding terminal 22. The metal energy-gathering ring body 21 is pre-buried in the insulator 12, and the metal energy-gathering ring body 21 surrounds the ignition needle 1. The grounding terminal 22 is connected to the bottom of the metal energy-gathering ring body 21. The grounding terminal 22 is exposed from the insulator 12 and is used to support against the base 30.

[0049] like Figure 2 , Figure 3 As shown, in the present embodiment, the main structure of the metal energy focusing ring 2 is a metal energy focusing ring body 21 surrounding the ignition needle 1, and the metal energy focusing ring body 21 is pre-buried in the insulator 12. This structural design not only makes the appearance of the ignition device more concise, but more importantly, it makes the metal energy focusing ring 2 no longer affected by the adhesion of oil stains. In addition, a circular ring-shaped grounding terminal 22 supported against the base 30 is provided at the bottom of the metal energy focusing ring body 21 to ensure that the metal energy focusing ring 2 is reliably grounded and discharged. The above structural design makes the charge current more concentrated when the ignition needle 1 discharges, and the breakdown ability is stronger, thereby improving the product ignition success rate.

[0050] The grounding terminal 22 extends outwardly along the radial direction of the ignition needle 1 and abuts against the top surface of the base 30. Figure 2 , Figure 3 As shown, the grounding end 22 is a horizontal annular surface connected to the bottom of the metal energy focusing ring body 21. This annular surface ensures that the metal energy focusing ring 2 has sufficient contact area with the base 30, thereby ensuring that the metal energy focusing ring 2 can reliably and efficiently ground and discharge.

[0051] The outer side surface of the insulator 12 has a boss 121 extending outward, and the grounding terminal 22 is pressed between the bottom surface of the boss 121 and the top surface of the base 30. Figure 2 , Figure 3 As shown, in this embodiment, a cylindrical boss 121 extending outward and supported on the base 30 is provided on the outer side surface of the insulator 12. The boss 121 can make the ignition device better installed on the base 30, and the grounding terminal 22 is pressed between the bottom surface of the boss 121 and the top surface of the base 30. This structural design makes good use of the axial pressure between the ignition device and the base 30. On the one hand, the grounding terminal 22 can be reliably contacted with the base 30. On the other hand, the lower surface of the grounding terminal 22 and the top surface of the base 30 are also subjected to the axial pressure to form a sealing surface, thereby preventing oil from entering between the ignition needle 1 and the stove burner, thereby ensuring reliable ignition.

[0052] The grounding terminal 22 is flush with the outer side surface of the boss 121. Figure 2 , Figure 3 As shown, the grounding terminal 22 is a circular ring having the same size and area as the boss 121. This matching structure ensures that the grounding terminal 22 has enough area to contact the base 30, and prevents oil stains dripping on the ignition device from penetrating into the space between the grounding terminal 22 and the boss 121 along the upper surface of the grounding terminal 22 exposed outside the boss 121, thereby improving the ignition success rate of the ignition device.

[0053] The metal energy-gathering ring 2 further includes a buckle portion 23, which is pre-buried in the insulator 12, one end of which is connected to the top of the metal energy-gathering ring body 21, and the other end of which extends radially inwardly along the ignition needle 1. Figure 2 , Figure 3 As shown, the buckle portion 23 is a circular ring structure which is perpendicular to the metal energy gathering ring body 21 and extends inward from the top of the metal energy gathering ring body 21. The buckle portion 23, the metal energy gathering ring body 21 and the grounding terminal 22 connected in sequence make the cross-section of the metal energy gathering ring 2 present a "Z"-shaped structure. This buckle portion 23 is embedded in the insulator 12, which can prevent the metal energy gathering ring 2 from falling off from the insulator 12, so that the metal energy gathering ring 2 can be more firmly installed in the insulator 12.

[0054] The metal energy-gathering ring body 21 is close to the outer side of the insulator 12, and the distance between the metal energy-gathering ring body 21 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 charge on the outer peripheral surface of the insulator 12 and introduce it into the ground terminal 22. 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, 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.

[0055] 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 region is at an equipotential, and the electric field strength is equal everywhere. The potential at the connection point 113 is close to zero, so that a potential difference is generated 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.

[0056] The distance between the upper end of the metal energy focusing ring body 21 and the connection point 113 is 3-5 mm; and / or, the distance between the lower end of the metal energy focusing ring body 21 and the connection point 113 is 3-5 mm. When the ignition device ignites, analysis of the sinusoidal waveform of the discharge pulse shows that the first wave of the pulse is a positive voltage and has the largest high voltage value, 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 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 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, and 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.

[0057] The stove burner further comprises a base 30 , the top surface of the base 30 is provided with an upwardly protruding mounting boss 301 , the ignition needle 1 is passed through the mounting boss 301 , and the grounding terminal 22 abuts against and contacts the top surface of the mounting boss 301 .

[0058] In this embodiment, if Figure 2 , Figure 3 As shown, a cylindrical mounting boss 301 protruding upward is provided on the base 30 through which the ignition needle 1 of the stove burner is passed, and the lower surface of the grounding terminal 22 of the ignition device is in contact with the top surface of the boss 121, and the boundaries of the grounding terminal 22, the boss 121 of the insulator 12, and the mounting boss 301 are aligned, which can effectively reduce impurities such as oil and dirt that penetrate from their contact surfaces. More importantly, the design of this mounting boss 301 can ensure that even if there is a large amount of oil and liquid overflow on the ignition device, the oil and liquid overflow can flow along the ignition device to the stove burner, and will not accumulate on the ignition device, thereby ensuring that the ignition device can discharge and ignite normally.

[0059] 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 focusing ring for grounding, the ignition needle includes an electrode needle and an insulator, the insulator is covered on the electrode needle, the metal energy focusing ring includes a metal energy focusing ring body and a grounding end, the metal energy focusing ring body is pre-buried in the insulator, and the metal energy focusing ring body surrounds the ignition needle, the grounding end is connected to the bottom of the metal energy focusing ring body, the grounding end is exposed from the insulator and is used to support against the base.

2. The ignition device according to claim 1, characterized in that The grounding end extends outwardly along the radial direction of the ignition needle and abuts against the top surface of the base.

3. The ignition device according to claim 2, characterized in that: The outer side surface of the insulator is provided with a boss extending outward, and the grounding end is pressed between the bottom surface of the boss and the top surface of the base.

4. The ignition device according to claim 3, characterized in that: The grounding end is flush with the outer side surface of the boss.

5. The ignition device according to claim 1, characterized in that: The metal energy focusing ring further comprises a buckle portion, which is pre-buried in the insulator, one end of which is connected to the top of the metal energy focusing ring body, and the other end of which extends radially inwardly along the ignition needle.

6. The ignition device according to claim 1, characterized in that: The metal energy focusing ring body is close to the outer side surface of the insulator, and the distance between the metal energy focusing ring body and the outer side surface of the insulator is 1-2 mm.

7. 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.

8. The ignition device according to claim 7, characterized in that The distance between the upper end of the metal energy-gathering ring body and the connection point is 3-5 mm; And / or, the distance between the lower end of the metal energy focusing ring body and the connection point is 3-5 mm.

9. A stove burner, characterized in that: It comprises an ignition device as claimed in any one of claims 1-8.

10. The stove burner according to claim 9, characterized in that: The stove burner also includes a base, the top surface of the base is provided with an upwardly protruding mounting boss, the ignition needle is penetrated through the mounting boss, and the grounding end abuts against and contacts the top surface of the mounting boss.

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