Furnace end capable of improving flaming stability

Abstract

The invention discloses a furnace end capable of improving flaming stability. The furnace end comprises a shell with an inner cavity and N plasma combustion assemblies arranged in the shell. The deceleration blocks distributed in the gas inlet pipe in a staggered manner are used for decelerating the gas flow, so that the retention time of the gas in the plasma combustion assembly is prolonged, and the ionization efficiency and the plasma generation quality are improved; the first flow blocking ring in the fire spraying pipe and the second flow blocking ring at the upper end of the electrode needle can block direct impact of airflow, so that the airflow flows upwards in a more stable state, concentration increase of plasma near the electrode needle is facilitated, and plasma jet flow can be stably sprayed out; the conductive pipe and the air inlet pipe are integrated stainless steel fittings, so that the integrated stainless steel fittings are manufactured through a mold, only a relatively simple and standardized process of mold forming needs to be completed, batch production can be realized, and the production period can be greatly shortened.

Description

Technical Field

[0001] The invention relates to an electric flame cooker. Background Art

[0002] The electric flame stove, also known as the plasma stove, is a new type of flame generation method. It uses a high-frequency changing electric field. An arc occurs between two electrodes under a certain voltage. The arc is a beam of high-temperature ionized gas. The electric flame stove uses a continuous arc as the energy for heating the pot.

[0003] For example, the patent application number 202322561701X discloses a burner head for an electric flame stove, including: an air supply device, provided with a cover and an air supply chamber. An arc is generated between the ion needle and the conductive flamethrower of the patent, and then the air flow is introduced by the air inlet with an inclined design on the side wall of the air vortexer to mix with the plasma to form a rotating working medium jet that can protect the arc generation and heat the pot body. However, in actual experiments, since the rotating working medium jet is squeezed by the air flow continuously introduced by the air inlet, it moves upward passively, so the flow rate of the jet cannot achieve a good effect.

[0004] In response to the above problems, the patent application number is 202311369153.9, a burner head with a rotating working medium jet, including: a cathode plate, a plurality of cathode flamethrowers arranged on the cathode plate and having a hollow structure, a plurality of insulating seats, and a plurality of anode needles arranged on the insulating seats; the bottom of the insulating seat is provided with a plurality of air inlets, and the air inlets are inclined and used to produce an air fluid rotating in the arc generation space. The patent provides a plurality of inclined air inlets at the bottom of the insulating seat, and the airflow introduced into the arc generation space forms a rotating plasma airflow to protect the arc generation under the restriction of the inner wall of the cathode flamethrower. Since the air inlet is connected to the top of the cathode flamethrower, the plasma airflow forms a more effective jet to heat the bottom of the pot. The existing technology still has problems. The air enters the flamethrower at a high flow rate and is quickly ejected from the flamethrower nozzle. The air stays in the flamethrower for a very short time, so the gas is not fully ionized, which has a great impact on the quality of plasma generation, and the plasma jet cannot reach the ideal high temperature.

[0005] Furthermore, the existing technology for opening air inlet holes on ceramic tubes has a complicated process and requires special equipment and technicians to operate, such as laser drilling, mechanical drilling, etc. The equipment also needs to be precisely debugged and maintained to ensure the size accuracy and position accuracy of the air inlet holes, which increases the cost. At the same time, the scrap rate of ceramic tubes is high, and defects such as cracks and broken edges are prone to occur during the hole digging process. In addition, the aperture of the air inlet hole is prone to be smaller or the hole depth is larger, or the air inlet hole is easily blocked. These problems can lead to an increase in the scrap rate. Summary of the invention

[0006] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0007] A burner head for improving flame spraying stability, comprising: a shell with an internal cavity and N plasma combustion components arranged inside the shell; the shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are respectively provided with N upper mounting holes and lower mounting holes corresponding to the plasma combustion components; the plasma combustion component comprises a flame spraying tube, a conductive tube, a ceramic tube and an electrode needle, the flame spraying tube, the conductive tube and the ceramic tube are abutted in sequence, and the lower end of the electrode needle is installed in the ceramic tube; an air intake pipe is provided on the tube wall of the conductive tube, and a plurality of semicircular speed reduction blocks are arranged in the air intake pipe, and the speed reduction blocks close to each other are staggered, and the axis of the air intake pipe forms an angle of 90° with the axis of the conductive tube; Preferably, a first annular baffle ring is provided at the bottom of the inner wall of the flame-spraying tube, and a second annular baffle ring is provided at the upper end of the electrode needle; Preferably, a mounting platform is provided on the outer side of the bottom of the flame-spraying tube, the mounting platform abuts against the upper shell along the edge of the upper mounting hole, and the bottom surface of the mounting platform abuts against the top surface of the conductive tube; Preferably, a mounting ring is provided on the outer side of the top surface of the ceramic tube, the lower side of the mounting ring abuts against the lower shell along the edge of the lower mounting hole, and the ceramic tube extends downward through the lower mounting hole; Preferably, the nozzle of the flame-spraying tube is in a contracted shape; Preferably, an air intake fan is provided on the housing; Preferably, the flame-spraying tube, the conductive tube and the shell are all made of conductive materials and are connected to a ground wire.

[0008] Compared with the prior art, the advantages of the present invention are: The invention decelerates the airflow by means of deceleration blocks staggeredly distributed in the air inlet pipe, and the blocking of the electrode needles weakens the kinetic energy of the airflow, thereby prolonging the residence time of the gas in the plasma combustion component, thereby increasing the time for the gas to be ionized, and improving the ionization efficiency and the quality of plasma generation.

[0009] The first baffle ring in the flamethrower tube of the present invention and the second baffle ring at the upper end of the electrode needle can block the direct impact of the airflow, reduce the turbulence of the airflow and the generation of eddies, so that the airflow flows upward in a more stable state, which is beneficial to increase the concentration of plasma near the electrode needle, and the plasma jet can be stably ejected.

[0010] The conductive tube and the air intake pipe of the present invention are integral stainless steel accessories. Therefore, by adopting the method of manufacturing the integral stainless steel accessories through a mold, it is only necessary to complete the relatively simple and standardized process of mold forming, which can realize mass production and greatly shorten the production cycle.

[0011] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a perspective view of the present invention.

[0014] Figure 2 It is a structural stereogram of the plasma burner of the present invention.

[0015] Figure 3 It is a structural cross-sectional view of the plasma burner of the present invention.

[0016] Figure 4 1 is an exploded view of the housing of the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0019] In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal communication of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the technical features involved in the different embodiments of the present invention described later can be combined with each other as long as they do not conflict with each other.

[0021] See also Figure 1 and Figure 4 In an embodiment of the present invention, a burner head for improving flame spraying stability comprises: a shell 1 with an internal cavity and N plasma combustion components 2 arranged inside the shell 1; the shell 1 comprises an upper shell 110 and a lower shell 120, and the upper shell 110 and the lower shell 120 are respectively provided with N upper mounting holes 111 and lower mounting holes 121 corresponding to the plasma combustion components 2; See also Figure 2 and Figure 3 The plasma combustion assembly 2 includes a flame-spraying tube 210, a conductive tube 220, a ceramic tube 230 and an electrode needle 240. The flame-spraying tube 210, the conductive tube 220 and the ceramic tube 230 are abutted in sequence, and the lower end of the electrode needle 240 is installed in the ceramic tube 230; An air inlet pipe 221 is disposed on the wall of the conductive pipe 220 . A plurality of semicircular speed reduction blocks 222 are disposed in the air inlet pipe 221 . Adjacent speed reduction blocks 222 are staggeredly distributed, so that the airflow is continuously blocked and slowed down when passing through the air inlet pipe 221 .

[0022] The axis of the air inlet pipe 221 and the axis of the conductive tube 220 form an angle of 90°, so that the incoming gas collides with the electrode needle 240. This collision will block the forward direction of the gas, and part of the kinetic energy will be converted into internal energy and other forms of energy, thereby further reducing the outflow speed of the gas; therefore, the slowdown in the gas flow rate means that the residence time of the gas in the plasma combustion component 2 is extended, thereby increasing the time for the gas to be ionized, improving the ionization efficiency and the quality of plasma generation.

[0023] In the embodiment of the present invention, a first annular baffle ring 211 is provided at the bottom of the inner wall of the flamethrower 210, and a second annular baffle ring 241 is provided at the upper end of the electrode needle 240; the double baffle rings can block the direct impact of the airflow, reduce the turbulence of the airflow and the generation of eddies, so that the airflow flows upward in a more stable state, which is beneficial to increase the concentration of plasma near the electrode needle 240, and the plasma jet can be stably ejected.

[0024] In the embodiment of the present invention, a mounting platform 212 is provided on the outer side of the bottom of the flamethrower tube 210, the mounting platform 212 abuts against the upper shell 110 along the edge of the upper mounting hole 111, and the bottom surface of the mounting platform 212 abuts against the top surface of the conductive tube 220; a mounting ring 231 is provided on the outer side of the top surface of the ceramic tube 230, and the lower side of the mounting ring 231 abuts against the lower shell 120 along the edge of the lower mounting hole 121, and the ceramic tube 230 extends downward through the lower mounting hole 121.

[0025] In the embodiment of the present invention, the nozzle of the flamethrower 210 is contracted. According to the Bernoulli principle in fluid mechanics, when the gas flows through the contracted nozzle, the flow rate of the gas will increase significantly. When the plasma density in the plasma combustion component 2 continues to increase and the heat causes the plasma pressure to continue to expand, the energy contained in it is more and the momentum is greater. Therefore, in the embodiment of the present invention, when a plasma jet is formed and ejected from the nozzle of the flamethrower 210, the intensity of the jet will increase, and at the same time, the temperature of the plasma itself in the embodiment of the present invention is maintained at a higher temperature value.

[0026] In the embodiment of the present invention, an air intake fan 3 is provided on the housing 1; the air intake fan 3 can introduce fresh air from the outside into the housing 1, so that the air entering the plasma combustion component 2 is replenished. The entry of new air helps to provide a more sufficient material basis for the generation of plasma, ensures that plasma can be continuously and stably generated, and improves the quality and efficiency of the plasma jet.

[0027] In the embodiment of the present invention, the flamethrower 210, the conductive tube 220 and the housing 1 are all made of conductive materials and are connected to the ground wire to form a complete current loop, so that when the electrode needle 240 discharges to generate plasma, the current can flow smoothly, which helps to maintain the continuous generation of plasma and avoid problems such as poor current loops that affect the normal generation and working state of plasma. In addition, the housing 1 is a conductor and is grounded, which can play a role in shielding the electric field from interference with external circuits to a certain extent.

[0028] In the embodiment of the present invention, the conductive tube 220 and the air intake pipe 221 are integral stainless steel accessories. Therefore, by adopting the method of manufacturing the integral stainless steel accessories through molds, it is only necessary to complete the relatively simple and standardized process of mold forming, which can realize mass production and greatly shorten the production cycle.

[0029] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A burner head for improving flame spraying stability, comprising: A shell with an internal cavity and N plasma combustion components arranged inside the shell; characterized in that: The housing comprises an upper housing and a lower housing, and the upper housing and the lower housing are respectively provided with N upper mounting holes and lower mounting holes corresponding to the plasma combustion assembly; The plasma combustion assembly comprises a flame-spraying tube, a conductive tube, a ceramic tube and an electrode needle. The flame-spraying tube, the conductive tube and the ceramic tube are abutted in sequence, and the lower end of the electrode needle is installed in the ceramic tube. An air intake pipe is arranged on the wall of the conductive tube. A plurality of semicircular speed reduction blocks are arranged in the air intake pipe, and adjacent speed reduction blocks are staggered and distributed. An angle of 90° is formed between the axis of the air intake pipe and the axis of the conductive tube.

2. The burner head for improving flame spraying stability according to claim 1, characterized in that: A first annular baffle ring is provided at the bottom of the inner wall of the flame-spraying tube, and a second annular baffle ring is provided at the upper end of the electrode needle.

3. The burner head for improving flame spraying stability according to claim 2, characterized in that: A mounting platform is arranged outside the bottom of the flame-spraying tube, the mounting platform abuts against the upper shell along the edge of the upper mounting hole, and the bottom surface of the mounting platform abuts against the top surface of the conductive tube.

4. The burner head for improving flame spraying stability according to claim 3, characterized in that: A mounting ring is arranged on the outer side of the top surface of the ceramic tube, and the lower side of the mounting ring abuts against the lower shell along the edge of the lower mounting hole, and the ceramic tube extends downward through the lower mounting hole.

5. The burner head for improving flame spraying stability according to claim 4, characterized in that: The nozzle of the flame-spraying tube is in a contraction shape.

6. The burner head for improving flame spraying stability according to claim 5, characterized in that: An air suction fan is arranged on the shell.

7. The burner head for improving flame spraying stability according to claim 6, characterized in that: The flame-spraying tube, the conductive tube and the shell are all made of conductive materials and are connected to a ground wire.

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