Electric torch head with single anode

Abstract

The application discloses a single anode electric flame burner, comprising a ceramic shell, a single anode needle, a cathode pot ring, a spiral heating pipe, a heating coil and a blower. The single electrode structure of the application completely solves the problems of voltage drop and asynchronous discharge of multiple electrodes in parallel. The single anode needle of the application discharges with the annular cathode pot ring, improving the stability of the electric flame burner. The spiral heating pipe prolongs the heat exchange stroke, and the heat insulation cotton reduces heat loss, so that the air preheating efficiency is improved. The long discharge gap makes the ionization coverage wide, increasing the ionization efficiency, and thus the thermal efficiency of the electric flame burner is improved. The high-energy plasma flame generated by the long discharge gap can meet the high-power heating demand, and is suitable for high-temperature heating of commercial kitchens and industries.

Description

Technical Field

[0001] This invention specifically relates to an electric flame stove. Background Technology

[0002] Electric flame stoves employ multiple high-voltage discharge devices (connected by air-to-ground discharge between positive and negative electrodes) connected in parallel. Each device generates an electric field by blasting gas flow through high voltage. The gas flow collides with electrons in this electric field, ionizing gas molecules and exciting plasma. This plasma, with a temperature exceeding 1000 degrees Celsius, is used to heat cookware. Currently, electric flame stoves on the market are also known as electric fire stoves, electric fire starters, electric flame stoves, electric gas stoves, electric open flame stoves, plasma stoves, etc. All of these stoves utilize the working principle of high-voltage breakdown to excite plasma for heating cookware.

[0003] The breakdown voltage of the high-voltage discharge device in existing electric flame stoves is affected by factors such as the gap distance between the two electrode heads, the gas medium, and temperature. Multiple high-voltage discharge devices cannot be completely identical, therefore the timing of their breakdown discharge will also differ. For example, one group of high-voltage discharge devices may have a lower breakdown voltage, reaching the breakdown threshold first. Instantly, current conduction occurs between the two electrodes, forming a low-resistance arc path and allowing a large current to flow. Because multiple high-voltage discharge devices are connected in parallel to the secondary winding of the same transformer, they share a common power supply, resulting in a current / voltage imbalance. When one load discharges prematurely, generating a large current, the internal resistance and leakage inductance of the transformer's secondary winding will cause a significant voltage drop, drastically reducing the secondary output voltage. This leads to insufficient input voltage for other high-voltage discharge devices, preventing them from reaching the target high voltage and breaking down the air. Consequently, the circuits of other high-voltage discharge devices remain open, with no current and no work performed.

[0004] In addition, for high-power electric flame stoves, dozens or even hundreds of high-voltage discharge devices are usually set up in order to achieve the required power, which not only increases the difficulty of assembly and manufacturing costs, but also leads to a higher failure rate and inconvenient maintenance.

[0005] Meanwhile, in order to ensure circuit stability, existing technologies typically set the breakdown voltage between 8,000 and 10,000 volts. In order for the high-voltage discharge device to maintain stable breakdown of air, the discharge distance between the two electrode heads is usually set at 0.5-1 cm. The plasma formed by the short arc has a low probability of colliding with gas molecules, poor ionization efficiency, and limited electric flame temperature and heating efficiency.

[0006] If a single discharge device is used to achieve high-power, long-distance discharge, the discharge distance between the two electrode heads (anode and cathode) is set at 10-30 cm, which is much greater than the discharge distance of existing technologies. This will cause the gas between the two electrode heads to fail to break down properly, and the discharge device will not work properly.

[0007] Therefore, there is an urgent need for an electric flame furnace head that can simplify the structure, solve the problem of synchronous discharge of multiple electrodes, improve ionization efficiency, and increase the temperature of the electric flame. Summary of the Invention

[0008] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0009] A single-anode electric flame furnace head includes: a ceramic shell, a single anode needle, a cathode ring, a spiral heating tube, a heating coil, and a blower;

[0010] The cathode pot ring is installed on the top of the ceramic shell, and its interior is in communication with the interior of the ceramic shell;

[0011] The hot air outlet end of the spiral heating tube is connected to the interior of the ceramic shell, the air inlet end of the spiral heating tube is connected to the blower, and the heating coil is wound around the outside of the spiral heating tube.

[0012] The middle section of the anode needle is installed at the bottom of the ceramic shell, the lower end of the anode needle passes through the bottom of the ceramic shell and is connected downward to the anode of the power supply, and the discharge gap between the upper end of the anode needle and the cathode ring is greater than the preset discharge distance.

[0013] Preferably, the cathode pot ring has an annular structure, and the cathode pot ring is electrically connected to the cathode of the power supply;

[0014] Preferably, the spiral heating tube is made of steel, and heat insulation cotton is also placed between the heating coil and the spiral heating tube;

[0015] Preferably, the bottom of the ceramic shell is provided with a ceramic sleeve, the interior of which is a hollow structure with interconnected upper and lower parts, and the middle section of the anode needle is threadedly installed inside the ceramic sleeve;

[0016] Preferably, the preset discharge distance is the minimum critical distance for air cold breakdown under normal temperature and pressure, and its value ranges from 0.5 to 1 cm; the value range of the discharge gap is 10 to 30 cm.

[0017] Preferably, the heating method of the single-anode electric flame furnace head according to any one of the above claims is as follows:

[0018] S1. A high-frequency current is passed through the heating coil, which causes eddy currents to form inside the spiral heating tube. The eddy currents are quickly converted into heat, thus achieving rapid heating of the spiral heating tube.

[0019] S2. Simultaneously start the blower. External air enters the spiral heating tube through the air inlet end of the spiral heating tube for heat exchange, forming a high-temperature airflow.

[0020] S3. The high-temperature gas flowed out from the hot gas outlet and eventually entered the discharge gap between the upper end of the anode needle and the inner wall of the cathode pot ring.

[0021] S4. When the anode needle and cathode ring are energized, a stable high-voltage electric field is formed in the discharge gap.

[0022] S5. The high-temperature gas flow in the discharge gap undergoes thermal breakdown. The long-distance discharge between the upper end of the anode needle and the inner wall of the cathode pot ring increases the probability of collision between gas molecules and electrons, forming a high-energy plasma flame with higher heat.

[0023] S6. The blower continuously delivers air, causing the high-energy plasma flame to move upwards, thus achieving stable heating of the cookware.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] The single-electrode structure of this invention completely solves the problems of voltage drop and asynchronous discharge in multi-electrode parallel connection, thus improving the stability of electric flame stoves.

[0026] This invention features a single anode needle that discharges to a ring-shaped cathode, simplifying the structure of the electric flame furnace head.

[0027] The spiral heating tube of this invention extends the heat exchange path, and the insulation cotton reduces heat loss, thereby improving the air preheating efficiency. In addition, the long discharge gap allows for a wide ionization coverage, increasing ionization efficiency and thus improving the thermal efficiency of the electric flame stove.

[0028] The long discharge spacing of this invention generates a high-energy plasma flame, which increases the temperature of the electric flame, meeting the high-power heating requirements and is suitable for stir-frying in commercial kitchens and high-temperature heating in industry.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 This is a cross-sectional view of the structure of the present invention. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Please see Figures 1-2 In this embodiment of the invention, a single-anode electric flame stove head includes: a ceramic shell 1, a single anode needle 2, a cathode pot ring 3, a spiral heating tube 4, a heating coil 5, and a blower 6. The single-electrode structure of the present invention completely solves the problems of voltage drop and asynchronous discharge in multi-electrode parallel connection, and reduces complex circuits, thereby improving the stability of the electric flame stove.

[0038] In an embodiment of the present invention, the cathode pot ring 3 is installed on the top of the ceramic shell 1, and its interior is connected to the interior of the ceramic shell 1; the hot air outlet end 41 of the spiral heating tube 4 is connected to the interior of the ceramic shell 1, the air inlet end 42 of the spiral heating tube 4 is connected to the blower 6, and the heating coil 5 is wound around the outside of the spiral heating tube 4; the middle section of the anode needle 2 is installed at the bottom of the ceramic shell 1, the lower end of the anode needle 2 passes through the bottom of the ceramic shell 1 and connects downward to the anode of the power supply, and the discharge gap between the upper end of the anode needle 2 and the cathode pot ring 3 is greater than the preset discharge distance; the cathode pot ring 3 is a ring structure, and the cathode pot ring 3 is electrically connected to the cathode of the power supply; the bottom of the ceramic shell 1 is provided with a ceramic sleeve 11, the interior of the ceramic sleeve 11 is a hollow structure with interconnected upper and lower parts, and the middle section of the anode needle 2 is threadedly installed inside the ceramic sleeve 11.

[0039] The spiral heating tube 4 of this invention extends the heat exchange path, and the heat insulation cotton reduces heat loss, thereby improving the air preheating efficiency. The air can still be thermally broken down using the stable breakdown voltage of existing technology without the need to increase the voltage, thus ensuring the stability of the discharge circuit.

[0040] It should be noted that the high-temperature airflow generated inside the spiral heating tube 4 reaches the "easily ionized temperature" (the high temperature of hot air is usually around 300℃). Therefore, thermal breakdown can be achieved by using a voltage similar to the breakdown voltage of existing technologies, without the need to apply a higher starting breakdown voltage, thus ensuring the stability of the circuit.

[0041] In an embodiment of the present invention, the spiral heating tube 4 is made of steel, and heat insulation cotton (not shown in the attached drawings) is also placed between the heating coil 5 and the spiral heating tube 4. The heat insulation cotton prevents the high temperature of the spiral heating tube 4 from being conducted to the heating coil 5, thus preventing the insulation layer of the heating coil 5 from aging, short-circuiting, or having its service life shortened due to close contact with high temperature, and ensuring the stable operation of the heating coil 5.

[0042] The preset discharge distance described in this invention is the minimum critical distance for cold breakdown of air under normal temperature and pressure, and its value ranges from 0.5 to 1 cm.

[0043] This invention employs a single anode needle 2 discharge setting, which greatly increases the discharge gap to 10-30cm. The longer discharge gap results in a wider ionization coverage, increases ionization efficiency, and thus improves the thermal efficiency of the electric flame stove. At the same time, the longer discharge gap increases the probability of collisions between gas molecules and electrons in the electric field, triggering electron avalanche. The temperature of the resulting high-energy plasma flame far exceeds that of ordinary plasma in existing technologies, which can meet the high-power heating requirements and is suitable for stir-frying in commercial kitchens.

[0044] The heating method of the single-anode electric flame furnace head of the present invention is as follows:

[0045] S1. A high-frequency current is passed through the heating coil 5 to generate a high-intensity high-frequency alternating magnetic field. This magnetic field penetrates the spiral heating tube 4, causing countless closed eddy currents to form inside the heating tube. The eddy currents flow rapidly in the tube wall and generate Joule heat, which enables the spiral heating tube 4 to heat up rapidly. With the help of the heat insulation cotton between the heating coil 5 and the spiral heating tube 4, the heat loss is greatly reduced, ensuring that the spiral heating tube 4 heats up to about 300°C in a short time, providing a sufficient heat source for air preheating.

[0046] S2. Simultaneously start the blower 6. External air enters the spiral heating tube 4 through the air inlet end 42 of the spiral heating tube 4 for heat exchange, forming a high-temperature airflow that reaches the temperature threshold where the air is easily ionized.

[0047] S3. The high-temperature airflow inside the spiral heating tube 4 flows out from the hot gas outlet end 41 and remains in a rotating state. It eventually concentrates and flows to the discharge gap area between the upper end of the anode needle 2 and the inner wall of the cathode pot ring 3, forming a stable high-temperature airflow field.

[0048] S4. When the anode needle 2 and the cathode pot ring 3 are energized, a uniformly distributed and stable high-voltage electric field is formed in the discharge gap between the tip structure at the upper end of the anode needle 2 and the annular discharge surface of the inner wall of the cathode pot ring 3.

[0049] S5. The high-temperature gas flow in the discharge gap undergoes thermal breakdown under the action of the high-voltage electric field. The long-distance discharge between the upper end of the anode needle 2 and the inner wall of the cathode pot ring 3, coupled with the inertia of the high-temperature gas flow maintaining rotational motion, extends the movement path of gas molecules in the electric field, increases the probability of collision between gas molecules and electrons, and forms a high-energy plasma flame with higher heat.

[0050] S6 and blower 6 continuously deliver air, forming an upward airflow thrust, which causes the high-energy plasma flame to move upward and act on the bottom of the pot above the cathode pot ring 3, achieving stable and efficient heating of the pot.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A single-anode electric flame furnace head, characterized in that, include: Ceramic housing, single anode needle, cathode ring, spiral heating tube, heating coil, and blower; The cathode pot ring is installed on the top of the ceramic shell, and its interior is in communication with the interior of the ceramic shell; The hot air outlet end of the spiral heating tube is connected to the interior of the ceramic shell, the air inlet end of the spiral heating tube is connected to the blower, and the heating coil is wound around the outside of the spiral heating tube. The middle section of the anode needle is installed at the bottom of the ceramic shell, the lower end of the anode needle passes through the bottom of the ceramic shell and is connected downward to the anode of the power supply, and the discharge gap between the upper end of the anode needle and the cathode ring is greater than the preset discharge distance. The preset discharge distance is the minimum critical distance for cold breakdown of air under normal temperature and pressure, and its value ranges from 0.5 to 1 cm; the value range of the discharge gap is 10 to 30 cm. The heating method for the single-anode electric flame furnace head is as follows: S1. A high-frequency current is passed through the heating coil, which causes eddy currents to form inside the spiral heating tube. The eddy currents are quickly converted into heat, thus achieving rapid heating of the spiral heating tube. S2. Simultaneously start the blower. External air enters the spiral heating tube through the air inlet end of the spiral heating tube for heat exchange, forming a high-temperature airflow. S3. The high-temperature gas flowed out from the hot gas outlet and eventually entered the discharge gap between the upper end of the anode needle and the inner wall of the cathode pot ring. S4. When the anode needle and cathode ring are energized, a stable high-voltage electric field is formed in the discharge gap. S5. The high-temperature gas flow in the discharge gap undergoes thermal breakdown. The long-distance discharge between the upper end of the anode needle and the inner wall of the cathode pot ring increases the probability of collision between gas molecules and electrons, forming a high-energy plasma flame with higher heat. S6. The blower continuously delivers air, causing the high-energy plasma flame to move upwards, thus achieving stable heating of the cookware.

2. The electric flame furnace head with a single anode according to claim 1, characterized in that, The cathode pot ring has a ring structure and is electrically connected to the cathode of the power supply.

3. The electric flame furnace head with a single anode according to claim 2, characterized in that, The spiral heating tube is made of steel, and heat insulation cotton is also placed between the heating coil and the spiral heating tube.

4. The electric flame furnace head with a single anode according to claim 3, characterized in that, The bottom of the ceramic shell is provided with a ceramic sleeve, the interior of which is a hollow structure with the upper and lower parts interconnected, and the middle section of the anode needle is threadedly installed inside the ceramic sleeve.

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