Fuel-free intensified ignition device

Abstract

The invention discloses a fuel-free intensified ignition device, and relates to the field of ignition, the fuel-free intensified ignition device comprises an electrode assembly, and the electrode assembly at least comprises two electrodes which are arranged at intervals; the high-voltage pack is used for generating high-voltage electricity; the high-voltage wire is connected between the high-voltage pack and the electrode assembly; an air supply unit for generating an air flow; one end of the hollow pipe is communicated with the air supply unit, and the other end of the hollow pipe is arranged at the electrode assembly; after the ignition coil and the electrode assembly are powered on, a high-voltage arc can be generated between two electrodes of the electrode assembly, airflow generated by the air supply unit is sprayed out of the electrode assembly through the hollow pipe, the high-voltage arc can be stretched under the action of the airflow and guided to the external space, and fuel-free arc flames are formed. The burner has the advantages that fuel is not needed, energy is adjustable, flames are stable, and the structure is simple.

Description

Technical Field

[0001] This invention relates to the field of ignition technology, and more specifically to an enhanced ignition device for fuelless systems. Background Technology

[0002] In the field of combustion equipment and energy utilization, the ignition device is a key component for achieving reliable fuel combustion, and its performance directly affects the start-up success rate, safety, and operational stability of the combustion system. Existing ignition methods typically include spark ignition, gas-assisted ignition, and plasma ignition, which are widely used in gas burners, industrial boilers, engines, and various thermal energy devices.

[0003] Traditional spark ignition typically relies on instantaneous discharge between electrodes, which has limited discharge energy and range. Ignition success rates are low under conditions of low fuel concentration, poor fuel atomization, or complex environmental conditions. To improve ignition reliability, some ignition systems require the introduction of auxiliary fuel or a continuous flame as an ignition source, which not only increases system complexity and operating costs but also raises safety risks.

[0004] While existing plasma or arc ignition technologies can provide high ignition energy, they still have certain shortcomings in practical applications. For example, high-voltage arcs are easily disturbed in airflow environments, resulting in unstable arc morphology and phenomena such as deflection and arc breakage, affecting ignition performance. Simultaneously, precise control of discharge energy is difficult, easily leading to severe electrode erosion and short service life. Furthermore, existing devices often require structural changes or parameter rematching when adapting to different fuel types and operating conditions, lacking versatility and flexibility. Summary of the Invention

[0005] This invention aims to address, to a certain extent, one of the technical problems in related technologies. To this end, this invention provides a fuel-free enhanced ignition device with advantages such as no fuel required, adjustable energy, stable flame, and simple structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An enhanced ignition device for fuelless combustion, comprising: An electrode assembly, the electrode assembly comprising at least two electrodes spaced apart from each other; A high-voltage transformer is used to generate high-voltage electricity; A high-voltage line, which connects the high-voltage transformer and the electrode assembly; An air supply unit is used to generate airflow; A hollow tube, one end of which is connected to the air supply unit, and the other end of which is disposed at the electrode assembly; When the high-voltage pack and the electrode assembly are energized, a high-voltage arc can be generated between the two electrodes of the electrode assembly. The airflow generated by the air supply unit is ejected from the electrode assembly through the hollow tube. The high-voltage arc can be stretched and guided to the external space under the action of the airflow to form a fuelless arc flame.

[0007] Through the synergistic effect of high-voltage discharge and airflow stretching, this device can form a stable electric arc flame without introducing any fuel, thus providing a reliable ignition source for different types of fuels and reducing the ignition system's dependence on auxiliary fuel. The stretching effect of the airflow on the electric arc allows it to extend outward from the electrode gap, forming an electric arc flame of adjustable length, thereby improving the ignition success rate. By adjusting the output parameters of the high-voltage transformer and the airflow intensity generated by the air supply unit, the energy intensity, length, and stability of the electric arc flame can be adjusted, enabling the device to adapt to the ignition requirements of different fuels and operating conditions. Furthermore, by adopting a modular combination structure of electrode components, high-voltage transformer, and air supply unit, the overall structure is relatively simple, with low manufacturing and maintenance costs, and is easy to integrate into existing ignition systems or combustion equipment.

[0008] Optionally, the electrode assembly includes a connecting bracket and two or more electrodes. The connecting bracket is connected to the high-voltage line. The connecting bracket is provided with a first through hole and a plurality of second through holes. The first through hole penetrates the connecting bracket along its axial direction, and the plurality of second through holes are evenly distributed around the periphery of the first through hole in a circumferential direction. Each electrode passes through a corresponding second through hole. The polarities of two oppositely arranged electrodes are opposite, and each electrode is electrically connected to the corresponding high-voltage line. The end of the hollow tube away from the air supply unit passes through the first through hole and is located in the discharge space formed by the plurality of electrodes.

[0009] Optionally, an annular plate is provided at one end of the hollow tube within the first through hole, and the annular plate is provided with a plurality of micro air holes.

[0010] Optionally, the air supply unit generates an airflow pressure of 0.5 kPa to 0.8 kPa.

[0011] Optionally, the outlet of the hollow tube is provided with a honeycomb-shaped rectifier hole.

[0012] Optionally, the multiple electrodes discharge using a staggered ignition method, with a preset phase difference between the discharges of adjacent electrodes.

[0013] Optionally, the high-voltage transformer is equipped with a pulse control circuit based on IGBT or MOSFET for adjusting the pulse width, pulse frequency and number of pulses during discharge.

[0014] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of the present invention will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. In addition, each of these features, elements and components appearing in the following text and drawings is a plurality of, and different symbols or numbers are used for convenience of representation, but all represent parts with the same or similar construction or function. Attached Figure Description

[0015] The following description, in conjunction with the accompanying drawings, further illustrates this application: Figure 1 This is a schematic diagram of the structure of one embodiment of this application; Figure 2 This is a cross-sectional view of the connecting bracket in the above embodiment; Figure 3 This is a schematic diagram showing the connection between the high-voltage line and the electrode in the above embodiment; Figure 4 This is a schematic diagram of the internal structure of the hollow tube in another embodiment of this application; Figure 5 This is a schematic diagram of the internal structure of the hollow tube in another embodiment of this application.

[0016] Among them, 1. Electrode; 11. Electrode tip; 2. Connecting bracket; 3. High voltage line; 4. Air supply unit; 5. Hollow tube; 6. High voltage transformer; 7. Annular plate; 7a. Micro air hole; 8. Honeycomb rectifier hole. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this application and should not be construed as limiting it.

[0018] The terms "an embodiment," "example," or "example" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this application. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0019] This embodiment provides a fuelless enhanced ignition device, comprising: an electrode assembly 1, which includes at least two electrodes 1 spaced apart from each other; a high-voltage transformer 6 for generating high-voltage electricity; a high-voltage wire 3 connecting the high-voltage transformer 6 and the electrode assembly 1; an air supply unit 4 for generating airflow; and a hollow tube 5, one end of which is connected to the air supply unit 4, and the other end of which is located at the electrode assembly 1. When the high-voltage transformer 6 and the electrode assembly 1 are energized, a high-voltage arc is generated between the two electrodes 1 of the electrode assembly 1. The airflow generated by the air supply unit 4 is ejected from the electrode assembly 1 through the hollow tube 5. Under the action of the airflow, the high-voltage arc is stretched and guided into the external space, forming a fuelless arc flame.

[0020] The high-voltage transformer 6 generates high-voltage electrical energy and is electrically connected to the electrode 1 assembly via the high-voltage line 3 to apply a high-voltage voltage to the electrode 1 assembly. When the high-voltage transformer 6 and the electrode 1 assembly are energized, a high electric field is formed between the two electrodes 1, causing gas breakdown at the gap between the electrodes 1, thereby generating a high-voltage electric arc. The air supply unit 4 generates an airflow with a certain pressure and flow rate. One end of the hollow tube 5 is connected to the air supply unit 4, and the other end is located at the electrode 1 assembly, allowing the airflow to be guided along the hollow tube 5 to the area where the electrode 1 assembly is located. When the airflow is ejected from the electrode 1 assembly through the hollow tube 5, the airflow direction is basically consistent with the extension direction of the electric arc. The high-voltage electric arc generated between the electrodes 1 is stretched under the action of the airflow and guided to the external space along the airflow direction, thereby forming a fuelless electric arc flame with a certain length and temperature. Specifically, the length of the fuelless electric arc flame generated by this device is 30 mm to 50 mm, and the flame temperature is 300℃ to 500℃.

[0021] Through the synergistic effect of high-voltage discharge and airflow stretching, this device can form a stable electric arc flame without introducing any fuel, thus providing a reliable ignition source for different types of fuels and reducing the ignition system's dependence on auxiliary fuel. The stretching effect of the airflow on the electric arc allows it to extend outward from the gap of electrode 1, forming an electric arc flame of adjustable length, thereby improving the ignition success rate. By adjusting the output parameters of the high-voltage coil 6 and the airflow intensity generated by the air supply unit 4, the energy intensity, length, and stability of the electric arc flame can be adjusted, enabling the device to adapt to the ignition requirements of different fuels and operating conditions. Furthermore, by adopting a modular combination structure of electrode 1 assembly, high-voltage coil 6, and air supply unit 4, the overall structure is relatively simple, with low manufacturing and maintenance costs, and is easy to integrate into existing ignition systems or combustion equipment.

[0022] Optionally, the electrode 1 assembly includes a connecting bracket 2 and two or more electrodes 1. The connecting bracket 2 is connected to the high-voltage line 3. The connecting bracket 2 is provided with a first through hole and multiple second through holes. The first through hole penetrates the connecting bracket 2 along the axial direction, and the multiple second through holes are evenly distributed around the periphery of the first through hole in the circumferential direction. Each electrode 1 is inserted through the corresponding second through hole. The polarities of two electrodes 1 arranged opposite to each other are opposite, and each electrode 1 is electrically connected to the corresponding high-voltage line 3. The end of the hollow tube 5 away from the air supply unit 4 is inserted through the first through hole and is located in the discharge space formed by the multiple electrodes 1.

[0023] Each electrode 1 is inserted into a corresponding second through hole, so that multiple electrodes 1 are distributed around the first through hole along the circumference. The electric fields generated by the multiple electrodes 1 are spatially superimposed, forming a stable discharge region around the first through hole. This helps to improve the certainty of arc initiation and the stability of the arc, and reduce the randomness of discharge. The multiple electrodes 1 are symmetrically distributed around the first through hole, and the airflow is ejected along the axis of the first through hole, so that both the discharge region and the airflow field have an axisymmetric structure. This allows the arc to be stably stretched axially under the action of the airflow, forming a fuel-free arc flame with a concentrated shape and consistent direction. The connecting bracket 2 can be made of ceramic material.

[0024] Understandably, in order to further improve the success rate of arc initiation, the structure of the electrode tip 11 of each electrode 1 is designed to extend into the discharge space and then continue to extend along the abstract shape of the electrode 1, presenting an L-shape, thereby reducing the spacing between the discharge electrodes 1 and avoiding arc initiation failure caused by excessive spacing between the electrodes 1.

[0025] In one alternative embodiment, an annular plate 7 is disposed at one end of the hollow tube 5 within the first through hole, and the annular plate 7 is provided with a plurality of micro air holes 7a.

[0026] The airflow generated by the air supply unit 4 enters the first through-hole through the hollow tube 5, and is then split at the annular plate 7. The central portion of the airflow passes directly along the inner channel of the annular plate 7, forming a central main airflow with a high axial velocity. The edge portion of the airflow must pass through multiple micro-holes 7a on the annular plate 7 before it can pass. Due to the throttling effect of the micro-holes 7a on the airflow, the velocity of this portion of the airflow is reduced, thus forming a circumferential auxiliary airflow with a lower axial velocity and uniform distribution around the central main airflow. The central main airflow is ejected axially and acts on the middle and rear section of the arc, stretching and guiding the arc. The circumferential auxiliary airflow surrounds the central main airflow and acts on the area of ​​the arc near the electrode 1, reducing the disturbance of the airflow to the root of the arc, thereby stabilizing the arc's starting position.

[0027] In one specific embodiment, the air supply unit 4 generates an airflow pressure of 0.5 kPa to 0.8 kPa. When the airflow pressure is set within the range of 0.5 kPa to 0.8 kPa, the axial tensile force generated by the airflow on the arc is sufficient to stably guide the high-voltage arc formed between the electrodes 1 to the external space, while avoiding significant disturbance to the arc root due to excessive airflow, thereby preventing the arc from being blown off or deviated, which is beneficial for maintaining a stable fuelless arc flame.

[0028] Optionally, the outlet of the hollow tube 5 is provided with a honeycomb-shaped rectifier hole 8.

[0029] After the airflow generated by the air supply unit 4 is transmitted through the hollow tube 5, it is divided into multiple small airflow channels flowing along the axial direction when passing through the honeycomb rectifier hole 8. The original transverse velocity component and rotation component in the airflow are weakened under the constraint of the rectifier hole, so that the airflow tends to flow axially uniformly at the outlet, thereby providing a more stable aerodynamic environment for arc stretching.

[0030] In one optional embodiment, multiple electrodes 1 discharge using a staggered ignition method, with a preset phase difference between the discharges of adjacent electrodes 1. Under the action of a control signal, the high-voltage discharge unit applies high voltage to each electrode 1 according to a preset phase relationship, causing the multiple electrodes 1 to sequentially enter the discharge state. By setting the discharge phase difference between adjacent electrodes 1, only some electrodes 1 are in a discharge or strong discharge state at any given time, while other electrodes 1 are in a waiting-to-discharge or weak discharge state. The multiple electrodes 1 form a continuous alternating discharge process in the time dimension, and the electric arcs generated by the discharge superimpose in space and are continuously stretched and guided by the airflow, thereby forming a continuous fuel-free electric arc flame. This avoids the instantaneous energy superposition caused by the simultaneous application of high voltage to multiple electrodes 1, improving the stability and reliability of the system operation.

[0031] Optionally, the high-voltage transformer 6 is equipped with a pulse control circuit based on IGBT or MOSFET for adjusting the pulse width, pulse frequency and number of pulses during discharge.

[0032] By adjusting the pulse width, pulse frequency, and number of pulses, the energy of a single discharge and the total discharge energy can be precisely controlled, allowing the energy output range of the fuelless arc flame to be flexibly adjusted within a large range to meet the ignition energy requirements of different fuels and different ignition conditions.

[0033] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art should understand that this application includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this application will be included within the scope of the claims.

Claims

1. A fuel-free enhanced ignition device, characterized in that, include: An electrode assembly, the electrode assembly comprising at least two electrodes spaced apart from each other; A high-voltage transformer is used to generate high-voltage electricity; A high-voltage line, which connects the high-voltage transformer and the electrode assembly; An air supply unit is used to generate airflow; A hollow tube, one end of which is connected to the air supply unit, and the other end of which is disposed at the electrode assembly; When the high-voltage pack and the electrode assembly are energized, a high-voltage arc can be generated between the two electrodes of the electrode assembly. The airflow generated by the air supply unit is ejected from the electrode assembly through the hollow tube. The high-voltage arc can be stretched and guided to the external space under the action of the airflow to form a fuelless arc flame.

2. The enhanced ignition device according to claim 1, characterized in that... The electrode assembly includes a connecting bracket and two or more electrodes. The connecting bracket is provided with a first through hole and a plurality of second through holes. The first through hole penetrates the connecting bracket along its axial direction, and the plurality of second through holes are evenly distributed around the periphery of the first through hole in a circumferential direction. Each electrode passes through a corresponding second through hole, and the polarities of two oppositely arranged electrodes are opposite, and each electrode is electrically connected to a corresponding high-voltage line. The end of the hollow tube away from the air supply unit passes through the first through hole and is located in the discharge space formed by the plurality of electrodes.

3. The enhanced ignition device according to claim 2, characterized in that, The hollow tube is provided with an annular plate at one end inside the first through hole, and the annular plate is provided with multiple micro air holes.

4. The enhanced ignition device according to claim 3, characterized in that, The air supply unit generates an airflow pressure of 0.5 kPa to 0.8 kPa.

5. The enhanced ignition device according to claim 3, characterized in that, The outlet of the hollow tube is provided with a honeycomb-shaped rectifier hole.

6. The enhanced ignition device according to claim 2, characterized in that, The multiple electrodes discharge using a staggered ignition method, and there is a preset phase difference in the discharge of adjacent electrodes.

7. The enhanced ignition device according to claim 6, characterized in that, The high-voltage transformer is equipped with a pulse control circuit based on IGBT or MOSFET to adjust the pulse width, pulse frequency and number of pulses during discharge.

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