Alternating current jet type furnace end unit and electric arc stove

Abstract

The utility model belongs to the technical field of electric gas stoves, and relates to an alternating current jet type furnace end unit and an electric arc stove, and the furnace end unit comprises a shell assembly, an electrode assembly and a circuit board assembly; the electrode assembly comprises a first electrode and a second electrode, and the first electrode and the second electrode are installed on the shell assembly; the bottom surface of the shell assembly is provided with a first accommodating cavity and a second accommodating cavity which are independent from each other; the circuit board assembly comprises a first circuit board and a second circuit board which are not connected, the first circuit board is arranged in the first containing cavity, one end of the first circuit board is electrically connected with the tail end of the first electrode, the other end of the first circuit board is used for being electrically connected with one output end of the transformer, and the second circuit board is arranged in the second containing cavity, and one end of the second circuit board is electrically connected with the tail end of the second electrode. The other end is electrically connected with the other output end of the transformer; the electric gas stove has the beneficial effects that the technical problems that an arc discharge phenomenon is easy to occur in the existing electric gas stove and the working stability is insufficient are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric stoves, in particular to an AC jet type burner unit and an electric arc stove. Background Art

[0002] The electric stove utilizes the characteristics of plasma, uses high voltage electricity to break through the air to form thermal plasma, converts electrical energy into thermal energy, and ultimately obtains a thermal plasma beam with ideal functions. It generates a thermal plasma beam similar to the characteristics of a plasma jet to heat the pot for cooking. This is a new type of stove.

[0003] The existing electric stove is equipped with positive and negative electrodes for generating plasma. Each positive electrode and negative electrode are connected to a circuit board through a plasma needle. The circuit board and the transformer are connected by wires. At this time, there may be a risk of arcing at these locations, which may damage the internal structure of the electric stove and its working stability is insufficient. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides an AC jet burner unit and an electric arc stove, which solve the technical problems of the prior electric stoves being prone to arcing and having insufficient working stability.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] In the first aspect, an embodiment of the utility model provides an AC jet-type burner unit, comprising a shell assembly, an electrode assembly and a circuit board assembly; the electrode assembly comprises a first electrode and a second electrode, the first electrode and the second electrode are installed in the shell assembly, and their upper ends extend out of the top surface of the shell assembly, and their ends extend out of the bottom surface of the shell assembly; the bottom surface of the shell assembly is provided with a first accommodating cavity and a second accommodating cavity independent of each other; the circuit board assembly comprises a first circuit board and a second circuit board that are not connected to each other, the first circuit board is placed in the first accommodating cavity, one end of which is electrically connected to the end of the first electrode, and the other end is used to be electrically connected to one output end of the transformer, and the second circuit board is placed in the second accommodating cavity, one end of which is electrically connected to the end of the second electrode, and the other end is used to be electrically connected to the other output end of the transformer.

[0009] Optionally, the electrode assembly also includes an electrode ceramic cover and a ceramic fitting, the ceramic fitting is fixedly mounted on the top surface of the shell assembly, and the electrode ceramic cover is covered on the top surface of the ceramic fitting to form an electrode chamber; a fire outlet is provided on the top of the electrode ceramic cover, and a ventilation duct is provided on the ceramic fitting at a position opposite to the fire outlet, the heads of the first electrode and the second electrode are both mounted in the electrode chamber, and the lower parts of both extend out of the ceramic fitting.

[0010] Optionally, the first electrode and the second electrode each include an electrode head and an electrode needle, which are threadedly connected; the upper end of the electrode head is conical, and the two electrode needles pass through the mounting tube in the shell assembly and are electrically connected to the first circuit board and the second circuit board respectively.

[0011] Optionally, the shell assembly includes a burner bottom shell, a burner plate installed on the top of the burner bottom shell, and a burner frame mounted above the burner plate, the burner frame and the burner plate form a heating chamber, and the burner bottom shell and the burner plate form an insulating chamber; the electrode head is placed in the heating chamber, the electrode needle is placed in the insulating chamber and extends from the bottom wall of the burner bottom shell, and the ceramic matching parts are fixed on the burner plate; a blower is installed on the burner bottom shell, the air outlet of the blower is connected to the insulating chamber, and the insulating chamber is connected to the electrode chamber through a ventilation duct.

[0012] Optionally, the fire outlet is arranged in the middle of the electrode ceramic cover, and the first electrode and the second electrode are symmetrically arranged on both sides of the fire outlet.

[0013] Optionally, a gap is reserved between the electrode head and the electrode ceramic cover, and inclined surfaces are symmetrically provided on both sides of the inner wall surface of the top of the electrode ceramic cover, and the inclined surfaces extend upward and toward the fire outlet.

[0014] Optionally, spring pins are installed on the front sides of the first circuit board and the second circuit board;

[0015] Among them, a spring pin of the first circuit board and a spring pin of the second circuit board serve as a group of connecting parts and correspond to an electrode assembly, and are electrically connected to the first electrode and the second electrode of the electrode assembly; a plurality of capacitors are arranged on the bottom surface of the first circuit board and / or the second circuit board, and the current on the circuit board is input into the spring pin through the capacitor.

[0016] In the second aspect, an embodiment of the utility model provides an electric arc stove, including the aforementioned AC jet burner unit and an outer shell, the burner unit is installed in the outer shell, and its upper part is exposed on the upper surface of the outer shell; a transformer is arranged in the outer shell, the transformer is connected to the power supply, and the transformer is provided with two output terminals, and the two output terminals are electrically connected to the first circuit board and the second circuit board respectively.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the utility model are:

[0019] 1. An AC jet burner unit and an electric arc stove of the utility model adopt a first circuit board and a second circuit board, and the first circuit board and the second circuit board are correspondingly installed in the first accommodating cavity and the second accommodating cavity of the burner bottom shell, and the first accommodating cavity and the second accommodating cavity are separated by an insulator, which indirectly increases the distance between the two poles, avoids the high voltage at the two output ends of the transformer from arcing when passing through the first circuit board and the second circuit board, and solves the technical problems of the existing electric stove being prone to arcing and insufficient working stability.

[0020] 2. The two electrode heads of the electrode assembly are protected by the electrode chamber, and the outer walls of the two electrode needles are protected by the ceramic fittings and the mounting tubes on the bottom shell of the stove head, which further reduces the occurrence of arcing and makes the operation of the arc stove more stable and reliable.

[0021] 3. The electrode ceramic cover is provided with a fire outlet, and the ceramic matching part is correspondingly provided with a ventilation duct. A wind duct is formed at the position between the first electrode and the second electrode in the electrode chamber. Under the action of the blower, wind passes through the wind duct to blow the ions and arcs generated by the ionization of the first electrode and the second electrode out of the fire outlet, and sprays them to the bottom surface of the pot body on the stove head frame to heat the pot body. In other words, the ions and the arc are blown higher, and the contact between the arc and the pot body is more uniform, which greatly increases the utilization rate of the heat brought by the arc and provides a better cooking experience. At the same time, it also reduces the temperature of the electrode head and the electrode ceramic cover, protects the electrode head and the electrode ceramic cover, and prolongs the service life of the arc stove.

[0022] 4. The heads of the first electrode and the second electrode are both installed in the electrode chamber. A fire outlet is provided on the top of the electrode ceramic cover. A blower is used to blow the arc out of the fire outlet. Therefore, it is difficult for oil, water or other foreign matter to enter the electrode assembly, and electric shock is not likely to occur. It is safer, more reliable and cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of a burner unit of an arc range in an embodiment of an AC jet burner unit and an arc range of the utility model;

[0024] Figure 2 It is an exploded schematic diagram of a burner unit of an arc range in an embodiment of an AC jet burner unit and an arc range of the utility model;

[0025] Figure 3 It is a cross-sectional schematic diagram of an arc range along the length direction of an embodiment of an AC jet burner unit and an arc range of the utility model;

[0026] Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0027] Figure 5 It is a schematic structural diagram of a circuit board assembly of an arc range in an embodiment of an AC jet burner unit and an arc range of the utility model;

[0028] Figure 6 It is an exploded schematic diagram of an arc range electrode assembly of an embodiment of an AC jet burner unit and an arc range of the utility model;

[0029] Figure 7 It is a partially exploded schematic diagram of an arc range of an embodiment of an AC jet burner unit and an arc range of the utility model;

[0030] Figure 8 The utility model is an AC jet burner unit and an arc range embodiment of the utility model and an exploded schematic diagram of the outer shell of the arc range.

[0031] [Description of Reference Numerals]

[0032] 1. outer shell; 11. protective panel; 12. upper shell; 13. lower shell; 130. electronic device cavity;

[0033] 2. Burner unit; 21. Burner frame; 22. Burner plate; 220. Heat-generating chamber; 23. Burner bottom shell; 230. Heat-insulating chamber; 231. First accommodating chamber; 232. Second accommodating chamber; 233. Mounting pipe;

[0034] 24. electrode assembly; 2401. electrode head; 2402. electrode needle; 241. first electrode; 242. second electrode; 243. electrode ceramic cover; 2431. fire outlet; 2432. tubular air guide; 2433. inclined surface; 2434. flow guide inclined surface; 244. ceramic matching piece; 2441. ventilation duct; 245. electrode chamber;

[0035] 25. Circuit board assembly; 251. First circuit board; 252. Second circuit board; 253. Spring pin; 254. Silicone member; 255. Capacitor;

[0036] 3. Transformer;

[0037] 4. Blower;

[0038] 5. Control main board;

[0039] 6. Knob switch. DETAILED DESCRIPTION

[0040] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific implementation methods. Figure 3With reference to the orientation, the direction where the furnace head frame 21 is located is regarded as "up", and the direction where the lower shell 13 is located is regarded as "down".

[0041] The utility model provides an AC jet burner unit and an electric arc stove. The burner unit comprises a shell assembly, an electrode assembly and a circuit board assembly. The electrode assembly comprises a first electrode and a second electrode, which are mounted in the shell assembly, and the upper ends of the first electrode and the second electrode extend out of the top surface of the shell assembly, and the ends of the first electrode and the second electrode extend out of the bottom surface of the shell assembly. The bottom surface of the shell assembly is provided with a first accommodating cavity and a second accommodating cavity which are independent of each other. The circuit board assembly comprises a first circuit board and a second circuit board which are not connected to each other. The first circuit board is placed in the first accommodating cavity, one end of which is electrically connected to the end of the first electrode, and the other end is used to be electrically connected to an output end of a transformer. The second circuit board is placed in the second accommodating cavity, one end of which is electrically connected to the end of the second electrode, and the other end is used to be electrically connected to the other output end of the transformer. Since the first circuit board and the second circuit board are adopted, and the first circuit board and the second circuit board are correspondingly mounted in the first accommodating cavity and the second accommodating cavity of the burner bottom shell, the distance between the two poles is indirectly increased, so as to avoid the arcing phenomenon of the high voltage at the two output ends of the transformer when passing through the first circuit board and the second circuit board, and solve the technical problems that the arcing phenomenon is easy to occur in the existing electric stove and the working stability is insufficient.

[0042] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0043] Embodiment 1:

[0044] See also Figure 1 and Figure 2 , this embodiment provides an AC jet burner unit, which is applied to an electric arc stove.

[0045] See also Figure 2 and Figure 6The furnace head unit 2 includes a shell assembly, an electrode assembly 24 and a circuit board assembly 25. There are a plurality of electrode assemblies 24, each of which includes a first electrode 241, a second electrode 242, an electrode ceramic cover 243 and a ceramic matching piece 244. A fire outlet 2431 is provided on the top of the electrode ceramic cover 243. The top surfaces of the electrode ceramic cover 243 and the ceramic matching piece 244 form an electrode chamber 245. The electrode heads 2401 of the first electrode 241 and the second electrode 242 are both installed in the electrode chamber 245. The electrode needles 2402 of both extend from the ceramic matching piece 244 and pass through the heat insulation cavity 230 to be electrically connected with the circuit board assembly 25.

[0046] See also Figures 2 to 5 The circuit board assembly 25 includes a first circuit board 251 and a second circuit board 252 that are independent of each other. A transformer 3 is provided in the outer shell 1, and the transformer 3 is provided with two output ends. One end of the first circuit board 251 is electrically connected to the first electrode 241, and the other end thereof is connected to one output end of the transformer 3. One end of the second circuit board 252 is electrically connected to the second electrode 242, and the other end thereof is connected to the other output end of the transformer 3.

[0047] It should be noted that after the transformer 3 is connected to the power supply and energized, a large number of ions are generated at the top of the electrode heads 2401 of the first electrode 241 and the second electrode 242 according to the principle of voltage tip discharge. The weight of ions is lighter than air, and the ions drift upward. Due to the characteristics of alternating current, a voltage difference occurs in the ion voltages generated by the two electrodes, and finally an ion discharge is formed. Since the two electrode heads 2401 do not discharge in a straight line, but the ions move upward and then discharge, the arc finally forms an upward waveform, which hits the bottom of the pot body from the fire outlet 2431. Therefore, it is more friendly to the electrode heads 2401 of the first electrode 241 and the second electrode 242, effectively reduces the temperature of the electrode heads 2401, and extends the service life of the electrode heads 2401.

[0048] See also Figure 4 and Figure 6In some feasible schemes, the first electrode 241 and the second electrode 242 both include an electrode head 2401 and an electrode needle 2402, and the upper end of the electrode head 2401 is set to be conical, and the lower end thereof is generally set to be cylindrical. The upper end of the electrode needle 2402 is threadedly connected to the electrode head 2401, and the lower end thereof is electrically connected to the circuit board assembly 25 through the spring pin 253. The electrode needle 2402 is usually made of stainless steel. The two electrode heads 2401 of the electrode assembly 24 are symmetrically arranged at the lower position on both sides of the fire outlet 2431, and a gap is reserved between the top surface of the electrode ceramic cover 243, which provides space for the ions to move upward in the electrode chamber 245, so that the ions move upward for a distance before discharging, so that the discharge position deviates from the electrode head 2401, and the electrode head 2401 is prevented from being burned by the high temperature of the discharge.

[0049] Continue reading Figure 4 and Figure 6 In actual application, the middle of the top surface of the electrode ceramic cover 243 is concave downward and provided with an opening, forming a fire outlet 2431. The fire outlet 2431 is located directly above the line connecting the first electrode 241 and the second electrode 242, and the fire outlet 2431 extends along the line connecting the first electrode 241 and the second electrode 242. An inclined surface 2433 is provided on the inner surface of the top end of the electrode ceramic cover 243, and the upper end of the inclined surface 2433 is connected to the fire outlet 2431, guiding the ions and arcs to move toward the fire outlet 2431.

[0050] See also Figure 3 The ceramic matching piece 244 is fixed on the burner head plate 22 described later by high temperature ceramic glue, and its lower end extends into the heat insulation cavity 230, effectively reducing water from entering the burner head and avoiding damage to various electronic devices. The burner head plate 22 is connected with a grounding wire, which greatly protects the safety of the user and avoids electric shock.

[0051] See also Figure 6 The top surface of the electrode ceramic cover 243 is provided with guide slopes 2434 on both sides of the fire outlet 2431. The closer the top surface of the electrode ceramic cover 243 is to the fire outlet 2431, the higher the position is, that is, the top surface of the electrode ceramic cover 243 is cone-shaped as a whole, which is convenient for guiding water that falls on the edge of the fire outlet 2431 of the electrode ceramic cover 243, and avoiding water from falling into the fire outlet 2431 as much as possible.

[0052] See also Figure 2 and Figure 3In some feasible solutions, the housing assembly includes a burner bottom shell 23, a burner plate 22 mounted on the top of the burner bottom shell 23, and a burner frame 21 mounted above the burner plate 22. The burner frame 21 and the burner plate 22 enclose a heating chamber 220, and the burner bottom shell 23 and the burner plate 22 enclose a heat-insulating chamber 230. The upper end of the electrode assembly 24 is installed in the heating chamber 220, and the lower end thereof is placed in the heat-insulating chamber 230. The electrode needle 2402 extends from the bottom wall of the burner bottom shell 23 and is electrically connected to the circuit board assembly 25 mounted on the outer bottom surface of the burner bottom shell 23. When in use, the pot body is placed on the burner frame 21, and the arc will spray on the bottom of the pot body to heat it after the arc cooker is powered on.

[0053] It should be noted that the burner plate 22, the burner bottom shell 23 and the burner frame 21 can be made of stainless steel or other materials with good heat resistance. The burner frame 21 is fixed on the burner plate 22, and a gap is reserved between the two. When water enters the heating chamber 220, it can quickly flow out through this gap; the ceramic fitting 244 is assembled on the burner plate 22 and sealed with high-temperature ceramic glue, so only a very small amount of water may enter the insulation chamber 230 through the fire outlet 2431 of the electrode ceramic cover 243 and the ventilation channel 2441 of the ceramic fitting 244. The water entering the insulation chamber 230 can be discharged into the electronic device chamber 130 through the drainage port of the burner bottom shell 23, and then flow out to the outside through the opening of the lower shell 13. In addition, the guide slopes 2434 of the electrode ceramic cover 243 located on both sides of the fire outlet 2431 can also guide the water falling on the edge of the fire outlet 2431 of the electrode ceramic cover 243. The top surface of the electrode ceramic cover 243 is a cone as a whole, which reduces the possibility of water entering the fire outlet 2431. The high-temperature ceramic glue has the effects of heat conduction, heat dissipation and waterproofing.

[0054] See also Figure 1 , Figure 3 and Figure 4 In order to make the pot body heated more evenly and improve the utilization efficiency of the heat generated by ionization, the ceramic matching part 244 is provided with a ventilation channel 2441 just below the fire outlet 2431, and the ventilation channel 2441 is respectively connected to the electrode chamber 245 and the heat insulation chamber 230. A blower 4 is installed on the furnace head bottom shell 23, and the air outlet of the blower 4 is connected to the heat insulation chamber 230, and the air inlet of the blower 4 is connected to the electronic device chamber 130 described later. The blower 4 is electrically connected to the control mainboard 5.

[0055] Furthermore, a tubular air guide 2432 is provided at the bottom of the electrode ceramic cover 243 at a position opposite to the ventilation duct 2441, so as to centrally convey the wind of the blower 4 to the position of the conical portion of the electrode head 2401. That is, in the electrode chamber 245, at the position between the tubular air guide 2432 and the fire outlet 2431, an air duct is formed at the position of the first electrode 241 and the second electrode 242, so that the wind blowing toward the ions and the arc is more concentrated, and the arc is blown out from the fire outlet 2431, and the wind is blown higher and more steadily, so that the arc heating effect is better.

[0056] Under the action of the blower 4, air is continuously sent from the electronic device cavity 130 into the insulation cavity 230, and enters the electrode cavity 245 through the ventilation duct 2441 and the tubular air guide 2432 in turn, blowing the arc generated by the first electrode 241 and the second electrode 242 out from the fire outlet 2431 and hitting the pot body. The ions drift upward a longer distance and the arc height is higher, forming a flame combustion effect, which not only reduces the temperature of the electrode cavity 245 and protects the electrode head 2401, the electrode ceramic cover 243 and the ceramic matching part 244, but also prolongs the service life of the arc stove, improves the utilization efficiency of thermal energy, and makes the contact between the arc and the pot body better, so that the pot body is heated more evenly.

[0057] See also Figure 4A fire outlet 2431 is provided on the top of the electrode ceramic cover 243, and the upper parts of the electrode heads 2401 of the first electrode 241 and the second electrode 242 are set to be cone-shaped. The two electrode heads 2401 are covered by the electrode ceramic cover 243 and the ceramic matching piece 244, and the lower ends of the two electrode heads 2401 are separated by the tubular air guide 2432. The purpose of such a setting is to cover the part other than the top of the electrode head 2401 with a ceramic material to ensure that the tip of the electrode head 2401 is ionized, to achieve voltage tip discharge, to ensure that the arc is generated above the electrode head 2401, to reduce the influence of the arc on the two electrode heads 2401, to protect the electrode heads 2401, and after the two electrode heads 2401 are wrapped, it is not easy to get an electric shock if foreign objects enter the furnace head. At the same time, under the action of the blower 4 continuously supplying air, the wind blows the arc from the air duct to the outside of the fire outlet 2431, and the arc forms an upward waveform to achieve the effect of flame combustion, so that the heat reaches the bottom surface of the pot body, which is more efficient and energy-saving, and blows the heat of the electrode ceramic cover 243 to the pot body, cools the electrode ceramic cover 243, and effectively protects the electrode head 2401 and the electrode ceramic cover 243. The middle section and the lower section of the electrode needle 2402 are respectively covered by the ceramic matching piece 244 and the mounting tube 233, and the first circuit board 251 and the second circuit board 252 for connecting the first electrode 241 and the second electrode 242 are installed in two independent accommodating chambers, which indirectly increases the distance between the two poles, avoids the high voltage at the two output ends of the transformer 3 from arcing when passing through the first circuit board 251 and the second circuit board 252, and the operation of the arc stove is more stable and reliable.

[0058] Discharge is performed through the first electrode 241 and the second electrode 242. The pot body is not limited to a metal pot. Non-metal pots such as ceramic pots and casseroles can also be used on the arc stove. The arc stove can adapt to more application scenarios. At the same time, there is no need to use the pot body as a discharge electrode to avoid the pot body being burned through by high temperature.

[0059] In actual production and application, the distance between the two electrode heads 2401 of the electrode assembly 24 is usually set to 8 mm-12 mm. The number of electrode assemblies 24 is not limited and is set according to actual needs.

[0060] See also Figure 1 and Figure 5 In some feasible solutions, the first circuit board 251 is arranged around the outer peripheral edge of the second circuit board 252, and the first circuit board 251 and the second circuit board 252 are separated.

[0061] Specifically, the outer surface of the bottom wall of the furnace head bottom shell 23 is provided with a first accommodating cavity 231 and a second accommodating cavity 232, which are independent of each other and separated by an insulator. The first accommodating cavity 231 is used to install the first circuit board 251, and the second accommodating cavity 232 is used to install the second circuit board 252. Therefore, the first circuit board 251 and the second circuit board 252 are separated by the insulator to avoid arcing of the high voltage at the two output ends of the transformer 3 when passing through the first circuit board 251 and the second circuit board 252. The arcing phenomenon, also known as the arc phenomenon, refers to the fact that when the voltage between two electrodes in a circuit exceeds the breakdown voltage of the gas medium, an arc will be formed between the electrodes, thereby generating a continuous discharge phenomenon.

[0062] See also Figure 4 and Figure 5 In the actual production and application process, the front of the first circuit board 251 and the second circuit board 252 are evenly installed with spring pins 253. The silicone member 254 is wrapped around the outer peripheral side wall of the spring pin 253, one end of the silicone member 254 abuts against the top surface of the first circuit board 251 or the second circuit board 252, and the other end abuts against the inner wall surface of the first accommodating cavity 231 or the second accommodating cavity 232. Among them, a spring pin 253 of the first circuit board 251 and a spring pin 253 of the second circuit board 252 serve as a pair of connecting parts, and correspond to an electrode assembly 24, and are electrically connected to the first electrode 241 and the second electrode 242 of the electrode assembly 24. The two circuit boards of the furnace head are electrically connected to the electrode assembly 24 by means of the spring pin 253 contact, which eliminates the welding process and optimizes the production process.

[0063] See also Figure 1 A plurality of capacitors 255 are disposed on the bottom surface of the first circuit board 251 and / or the second circuit board 252 . The number of the capacitors 255 is equal to the number of the spring pins 253 on the circuit board. The current on the circuit board passes through the capacitors 255 and is then input into the spring pins 253 .

[0064] In actual application, the first circuit board 251 is not provided with capacitor 255, and capacitor 255 is only provided on the second circuit board 252. The capacitor 255 on the second circuit board 252 shunts the total current so that the ions released at the same time by the multiple electrode heads 2401 corresponding to the second circuit board 252 are of the same positive and negative polarity. According to the principle of positive and negative ion correspondence, the number of positive ions released by an electrode head 2401 of the second circuit board 252 per unit time is equal to the number of negative ions neutralized by the corresponding electrode head 2401 on the first circuit board 251. Based on this principle, the first circuit board 251 does not need to be shunted by capacitor 255, and can be shunted by capacitor 255 of the second circuit board 252, thereby simplifying the production process and reducing production costs.

[0065] Embodiment 2:

[0066] On the basis of Embodiment 1, Embodiment 2 provides an electric arc range, comprising an outer shell 1 and the aforementioned burner unit 2.

[0067] See also Figure 7 The burner unit 2 is installed in the outer shell 1, and its upper part is exposed on the upper surface of the outer shell 1. The outer shell 1 is provided with a transformer 3, which is connected to the power supply. The transformer 3 is provided with two output terminals, which are electrically connected to the first circuit board 251 and the second circuit board 252 respectively.

[0068] See also Figure 8 In some feasible schemes, the outer shell 1 includes a protection panel 11, an upper shell 12 and a lower shell 13 from top to bottom, the protection panel 11 covers the top surface of the upper shell 12, the upper shell 12 and the lower shell 13 cover each other to form an electronic device cavity 130, and a control main board 5 and a transformer 3 are arranged in the electronic device cavity 130, one end of the control main board 5 is externally connected to a power supply, and the other end thereof is electrically connected to an input end of the transformer 3, a knob switch 6 is arranged on the control main board 5, and the upper end of the knob switch 6 passes through the upper shell 12 and the protection panel 11, and is exposed on the outer surface of the protection panel 11.

[0069] In actual use, the protective panel 11 is generally made of a tempered glass plate. The transformer 3 is an AC transformer. The electronic device cavity 130 is connected to the outside, and the air inlet of the blower 4 is connected to the electronic device cavity 130.

[0070] When in use, the power cord of the arc stove is connected to the external power supply, the knob switch 6 is rotated, the control mainboard 5 supplies power to the transformer 3, the transformer 3 supplies power to the first circuit board 251 and the second circuit board 252 respectively, the first circuit board 251 divides the current equally to the spring needle 253, the second circuit board 252 divides the current equally to the spring needle 253 after passing the current through the capacitor 255, the spring needle 253 guides the current to the electrode needle 2402, the electrode needle 2402 then guides the current to the electrode head 2401, the current of the first circuit board 251 is finally only guided to the electrode head 2401 of the first electrode 241 of the electrode assembly 24, and the current of the second circuit board 252 is finally only guided to the second The electrode head 2401 of the electrode 242 is connected to the two poles of the output end of the transformer 3 respectively. According to the characteristics of the AC transformer, there is a voltage difference between the two poles of the output end. The electrode head 2401 of the first electrode 241 and the electrode head 2401 of the second electrode 242 are ionized to generate an arc. At the same time, the main board 5 is controlled to start the blower 4, and the wind enters the insulation cavity 230. The wind passes through the ventilation duct 2441 of the ceramic matching part 244 and the tubular air guide part 2432 in turn, and the arc generated by the two electrode heads 2401 of the electrode assembly 24 is ejected through the fire outlet 2431 of the electrode ceramic cover 243 to heat the pot body.

[0071] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An AC jet burner unit, characterized in that: The furnace head unit (2) comprises a housing assembly, an electrode assembly (24) and a circuit board assembly (25); The electrode assembly (24) comprises a first electrode (241) and a second electrode (242), wherein the first electrode (241) and the second electrode (242) are installed in the shell assembly, and their upper ends extend out of the top surface of the shell assembly, and their ends extend out of the bottom surface of the shell assembly; The bottom surface of the housing assembly is provided with a first accommodating cavity (231) and a second accommodating cavity (232) which are independent of each other; The circuit board assembly (25) comprises a first circuit board (251) and a second circuit board (252) which are not connected to each other; the first circuit board (251) is placed in the first accommodating cavity (231), one end of which is electrically connected to the end of the first electrode (241), and the other end is used to be electrically connected to an output end of the transformer (3); the second circuit board (252) is placed in the second accommodating cavity (232), one end of which is electrically connected to the end of the second electrode (242), and the other end is used to be electrically connected to the other output end of the transformer (3).

2. An AC jet burner unit as claimed in claim 1, characterized in that: The electrode assembly (24) further comprises an electrode ceramic cover (243) and a ceramic matching piece (244), wherein the ceramic matching piece (244) is fixedly mounted on the top surface of the housing assembly, and the electrode ceramic cover (243) covers the top surface of the ceramic matching piece (244) to form an electrode chamber (245); The top of the electrode ceramic cover (243) is provided with a fire outlet (2431), and the ceramic matching piece (244) is provided with a ventilation duct (2441) at a position opposite to the fire outlet (2431) to form an air duct between the first electrode (241) and the second electrode (242) in the electrode chamber (245). The heads of the first electrode (241) and the second electrode (242) are both installed in the electrode chamber (245), and the lower parts of both extend out of the ceramic matching piece (244).

3. An AC jet burner unit as claimed in claim 2, characterized in that: The first electrode (241) and the second electrode (242) both include an electrode head (2401) and an electrode needle (2402), which are threadedly connected; the upper end of the electrode head (2401) is conical, and the two electrode needles (2402) pass through the mounting tube (233) in the shell assembly and are electrically connected to the first circuit board (251) and the second circuit board (252) respectively.

4. An AC jet burner unit as claimed in claim 3, characterized in that: The shell assembly comprises a burner bottom shell (23), a burner plate (22) mounted on the top of the burner bottom shell (23), and a burner frame (21) mounted above the burner plate (22); the burner frame (21) and the burner plate (22) enclose a heating cavity (220); and the burner bottom shell (23) and the burner plate (22) enclose a heat-insulating cavity (230); The electrode head (2401) is placed in the heating chamber (220), the electrode needle (2402) is placed in the heat-insulating chamber (230) and extends out from the bottom wall of the furnace head bottom shell (23), and the ceramic matching piece (244) is fixed on the furnace head plate (22); A blower (4) is installed on the furnace head bottom shell (23); an air outlet of the blower (4) is connected to the heat insulation cavity (230); and the heat insulation cavity (230) is connected to the electrode chamber (245) through the ventilation duct (2441).

5. An AC jet burner unit as claimed in claim 4, characterized in that: The fire outlet (2431) is arranged at a middle position of the electrode ceramic cover (243), and the first electrode (241) and the second electrode (242) are symmetrically arranged at two sides of the fire outlet (2431).

6. An AC jet burner unit as claimed in claim 3, characterized in that: A gap is reserved between the electrode head (2401) and the electrode ceramic cover (243), and inclined surfaces (2433) are symmetrically provided on both sides of the inner wall surface of the top of the electrode ceramic cover (243), and the inclined surfaces (2433) extend upward and toward the fire outlet (2431).

7. An AC jet burner unit as claimed in claim 1, characterized in that: The front surfaces of the first circuit board (251) and the second circuit board (252) are both provided with spring pins (253); Wherein, a spring pin (253) of the first circuit board (251) and a spring pin (253) of the second circuit board (252) serve as a set of connecting parts, and correspond to one electrode assembly (24), and are electrically connected to the first electrode (241) and the second electrode (242) of the electrode assembly (24); A plurality of capacitors (255) are provided on the bottom surface of the first circuit board (251) and / or the second circuit board (252), and the current on the circuit board passes through the capacitors (255) and is then input into the spring pins (253).

8. An electric arc range, characterized in that: Comprising a burner unit (2) according to any one of claims 1 to 7 and an outer shell (1), wherein the burner unit (2) is installed in the outer shell (1) and an upper part thereof is exposed on an upper surface of the outer shell (1); A transformer (3) is arranged in the outer shell (1), the transformer (3) is connected to a power supply, and the transformer (3) is provided with two output ends, the two output ends are electrically connected to the first circuit board (251) and the second circuit board (252) respectively.

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