CN212319803U - Safe type plasma kitchen - Google Patents

Abstract

The utility model discloses a safety plasma stove, which comprises a base, a stove head and an electric control unit, wherein a plurality of discharge electrodes are arranged in the stove head, and a voltage transformation circuit unit is arranged in the base and is electrically connected with the electric control unit and the discharge electrodes; the electric control unit is provided with a grounding detection circuit and a total electric quantity leakage detection circuit, the grounding detection circuit detects whether all protection grounding points of the plasma stove are effectively grounded, and the total electric quantity leakage detection circuit is used for detecting the difference between the inflow current and the outflow current of the positive electrode and the negative electrode of the electric control unit so as to judge whether the plasma stove leaks electricity; the grounding detection circuit is electrically connected with a protective grounding wire in the three-wire plug; but still be provided with lifting earthing device in the kitchen range, lifting earthing device is provided with the end that stretches out that can rise elastically and is used for with pan bottom elastic contact. The utility model discloses make the plasma kitchen can carry out top pot operation safely, and have ground connection detection and electric leakage detection multiple protection.

Description

Safe type plasma kitchen

Technical Field

The utility model relates to a cooking utensils technical field especially relates to a safe type plasma kitchen.

Background

Plasma (plasma), also known as plasma, is an ionized gaseous substance consisting of atoms deprived of part of electrons and positive and negative ions produced by ionization of radicals, a macroscopic electrically neutral ionized gas with dimensions greater than the debye length, whose motion is dominated mainly by electromagnetic forces and exhibits a pronounced collective behavior. The plasma is a good electric conductor, and the plasma can be captured, moved and accelerated by utilizing a magnetic field which is skillfully designed. The development of plasma physics provides new technology and process for the further development of science such as materials, energy, information, environmental space, space physics, geophysical and the like. Plasma is a fourth state of matter different from solid, liquid and gas. A substance is composed of molecules, which are composed of atoms, which are composed of a positively charged nucleus and negatively charged electrons surrounding it. When heated to a sufficiently high temperature or for other reasons, the outer electrons become free electrons free from the nuclei, as if the student after class runs to the playground to play at will. The electrons leave the nucleus, a process known as "ionization". At this point, the material becomes a uniform "paste" of positively charged nuclei and negatively charged electrons, and is thus called a plasma because it is called a "paste" by chance, which is a paste of ions of equal total positive and negative charge and therefore nearly electrically neutral.

The plasma stove is a novel stove which utilizes the characteristics of plasma, uses high-voltage electricity to breakdown air to form thermal plasma, converts electric energy into heat energy, finally obtains thermal plasma beams with ideal length and function, and generates the thermal plasma beams with similar flame characteristics to heat a pot for cooking.

The plasma cooker uses electric energy as direct energy input, and needs to boost the commercial power to a high voltage of about 10KV for generating plasma beams, so that under such a high working voltage, how to ensure the power utilization safety of users and prevent electric shock accidents becomes a very important matter.

The plasma cookers on the market at present have the following defects:

1. for safety, the user cannot turn the pot when using the plasma cooker to cook (the pot turning means that the pot is lifted up and away from the cooker and is repeatedly bumped to fully heat the cooked food). Because among the prior art, once lift up the pan and leave the kitchen range, then the pan is no longer effective ground connection, like this, if discharge electrode if towards the pot bottom discharge will make the pan electrified and easily arouse the human electric shock. Therefore, when the plasma stove is completely separated from a cooker, the current plasma stove simply and roughly adopts a method of immediately and directly turning off fire to prevent electric shock, but the design ensures that the power supply is immediately cut off and the fire is turned off by circuit control every time the cooker is lifted to be separated from a cooking range, then the cooker is put back to control to turn on fire, and the repeated turning off fire and the fire are repeatedly turned on, so that the heat supply of the cooker bottom is discontinuous, and the pot-turning cooking operation of the existing plasma stove cannot be normally carried out.

2. The existing plasma stove is only simply grounded on a stove shell, but whether the whole circuit, particularly an external power supply part is effectively grounded is not detected. In some old districts/rural areas and other areas, when a plurality of residential houses are connected with the power-on, the grounding wire is not strictly installed according to the national standard, so that even if the existing plasma stove product is provided with a grounding arrangement for the metal exposed part of the product in the internal circuit part, if the existing plasma stove product is used in the old district without the grounding wire, the grounding protection effect cannot be achieved, and the potential safety hazard exists.

3. The existing plasma stove is only connected with an electric leakage switch at an incoming line, and does not perform electric leakage detection on an internal circuit of the stove, so that the existing plasma stove also has potential safety hazards.

Therefore, the prior art has yet to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing prior art, an object of the utility model is to provide a safe type plasma kitchen aims at making the plasma kitchen can carry out the top pot operation safely, and has ground connection detection and electric leakage detection multiple protection.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a safety plasma stove comprises a base, a stove head arranged on the base and an electric control unit arranged in the base, wherein a plurality of discharge electrodes exposed above the base are arranged in the stove head;

the electric control unit is provided with a grounding detection circuit and a total electric quantity leakage detection circuit, the grounding detection circuit detects whether all protection grounding points of the plasma stove are effectively grounded, and the total electric quantity leakage detection circuit is used for detecting the difference between the inflow current and the outflow current of the positive electrode and the negative electrode of the electric control unit so as to judge whether the plasma stove leaks electricity;

the lead is a fire-earth three-wire lead, a three-wire plug is arranged on the lead, and the grounding detection circuit is electrically connected with a protective grounding wire in the three-wire plug;

but still be provided with lifting earthing device in the kitchen range, lifting earthing device upwards the protrusion be provided with the end that stretches out that can rise elastically and be used for with pan bottom elastic contact, stretch out end electric property ground connection and be connected with ground connection detection circuit electricity.

And the lead is also provided with a leakage protection switch connected with the three-wire plug and the electric control unit.

The lifting grounding device is also provided with a highest position switch circuit for detecting the highest position of the extending end, and the highest position switch circuit is electrically connected with the electric control unit.

The electronic control unit comprises a main control circuit and a power circuit electrically connected with the main control circuit, wherein the output end of the power circuit is electrically connected with the input end of the voltage transformation circuit unit;

the grounding detection circuit and the total electric quantity leakage detection circuit are electrically connected with the main control circuit.

The cooking range comprises a transformer circuit unit, a cooking range head and a connecting device, wherein the cooking range head also comprises an installation shell for installing the transformer circuit unit, the installation shell comprises an upper shell and a lower shell, the upper shell is provided with a grounding device installation cavity, and a grounding connecting wire is arranged in the grounding device installation cavity;

the lifting grounding device comprises a seat body, a sleeve arranged in the seat body, a spring arranged in the sleeve and abutted against the sleeve and the base, and a lifting rod sleeved in the spring, wherein the upper end of the lifting rod penetrates out of the sleeve for extending out, and the seat body is fixed in a grounding device mounting cavity of the upper shell and connected with the grounding connecting wire.

The part of the upper end of the sleeve, which is exposed out of the upper shell, is also sleeved with a ceramic protection tube;

the sleeve top still is provided with the direction mouth, the upper end of lifter wears to locate the direction mouth.

The upper surface of the upper shell is provided with a first wire groove communicated with the grounding device installation cavity, and a grounding connecting wire connected with the liftable grounding device in a grounding mode is arranged on the upper surface of the upper shell, first resistance grooves are further formed in the two sides of the first wire groove and the periphery of the grounding device installation cavity, and insulating glue for resistance is filled in the first wire groove and the first resistance grooves.

The cooking range further comprises a high-temperature-resistant insulating plate located above the installation shell, and the high-temperature-resistant insulating plate is provided with the plurality of discharge electrodes.

The high-temperature-resistant insulating plate is provided with a plurality of discharge electrodes, wherein a negative electrode used for forming a discharge loop with the plurality of discharge electrodes is further arranged above the high-temperature-resistant insulating plate;

the upper surface of the upper shell is also provided with a negative support mounting cavity and a second wire groove communicated with the negative support mounting cavity, and the second wire groove is used for laying a negative connecting wire connected with the negative electrode, the two sides of the second wire groove and the periphery of the negative support mounting cavity are also provided with second resistance grooves, and insulating glue for resistance is filled in the second wire groove and the second resistance grooves.

Wherein, still be provided with temperature sensor on the installation casing and be connected with the electrical control unit electricity.

The utility model discloses a safe type plasma kitchen, through set up liftable earthing device in the kitchen range for the end and the pan bottom elastic contact that stretch out of lift earthing device, like this when top pot operation, even the pan breaks away from the kitchen range and does not have under the condition of turning off the fire, the pan still can be through with the effective ground connection of contact that stretches out the end, once more, upwards break away from when stretching out the end again when the pan, have had enough big distance and make the discharge electrode can not discharge to the bottom of a boiler again and guarantee safety between bottom of a boiler and the discharge electrode. Whether external commercial power and the stove shell are effectively grounded or not is detected by arranging a three-wire plug and a grounding detection circuit, if the grounding is invalid, the power supply of the circuit is turned off through an electric control unit. Still be provided with total electric quantity electric leakage detection circuitry simultaneously and whether have the electric leakage to cooking utensils at the power consumption in-process and effectively detect, if have the electric leakage, then close the power supply, like this, the utility model discloses a plasma kitchen has ground connection detection, electric leakage detection, the multiple protection of lift earthing device and guarantees the safe in utilization of product, and can carry out top pot operation safely and needn't turn off the fire repeatedly and fire.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of a first embodiment of the safety type plasma stove of the present invention;

FIG. 2 is an exploded view of the structure of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the structure of FIG. 1;

fig. 4 is a schematic cross-sectional view of the contact state between the lifting grounding device and the bottom surface of the pot in the structure of fig. 1.

Fig. 5 is a schematic circuit diagram of a first embodiment of the safety plasma stove of the present invention;

fig. 6 is a schematic structural view of the mounting housing of the present invention;

fig. 7 is a schematic structural diagram of the liftable grounding device of the present invention;

FIG. 8 is an exploded view of the structure of FIG. 7;

description of reference numerals:

100-plasma cooker, 1-cooking range, 11-pot support, 12-installation shell, 121-upper shell, 1210-grounding device installation cavity, 1211-first wire groove, 1212-first resistance groove, 1213-negative pole support installation cavity, 1214-second wire groove, 1215-second resistance groove, 13-high temperature resistant insulation board, 14-negative pole, 122-lower shell, 13-switch button, 14-adjusting button, 15-temperature sensor, 16-cooling fan, 17-air inlet, 18-air outlet, 191-inlet wire connection port, 192-ground wire connection port, 2-base, 21-man-machine interaction panel, 22-switch button, 23-adjusting button, 3-electric control unit, 31-grounding detection circuit, 32-total electric quantity leakage detection circuit, 33-main control circuit, 34-power circuit, 4-discharge electrode, 5-transformation circuit unit, 6-lead, 7-three-wire plug, 7-high temperature resistant insulation board, 8-lifting grounding device, 81-lifting rod, 811-extending end, 82-seat body, 83-sleeve, 84-spring, 85-ceramic protection tube; 86-guide nozzle, 87-first electrode plate, 88-second electrode plate, 9-leakage protection switch, 10-highest switch circuit and 200-cooker.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection or a removable connection, or may be integral therewith; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 5, the present invention provides a safety plasma cooking range 100, which includes a base 2, and one or more cooking ranges 1 disposed on the base 2. The electric control unit 3 is arranged in the base 2, a plurality of discharge electrodes 4 exposed above the base 2 are arranged in the cooking range 1, a voltage transformation circuit unit 5 is further arranged in the base 2 and electrically connected with the electric control unit 3 and the discharge electrodes 4, a lead 6 connected with the electric control unit 3 and used for an external power supply extends out of the base 2, and the base 2 and the shell of the cooking range 1 are protected and grounded. The cooking range 1 further comprises a pot support 11 disposed on the base 1 for supporting a pot 200. The pot 200 may be made of metal pot or ceramic pot. The lead 6 is used for connecting external commercial power: 220V alternating current power supply. The protective grounding mode of the housing of the base 2 and the cooking range 1 may be to set a uniform protective grounding point (protective grounding terminal) inside the plasma range, and then the protective grounding terminal is connected to the housing of each metal component of the plasma range, such as the base 2, the cooking range 1, etc., through a circuit line, and simultaneously the protective grounding terminal is connected to a ground line in the wire 6 to connect a protective grounding line (PE) in an external utility power grid.

The electric control unit 3 is used for generating a driving power supply required by the voltage transformation circuit unit 5, and controlling the voltage transformation circuit unit 5 to be switched on and off and output power. The driving power supply generated by the electric control unit 3 is a high-frequency or low-frequency low-voltage power supply, the transformation circuit unit 5 converts the low-voltage power input by the electric control unit 3 into high-voltage power and outputs the high-voltage power to the discharge electrode 4 for discharging, and the electric arc generated by the discharge of the discharge electrode 4 ionizes air to generate high-temperature plasma to heat the pot bottom. In the embodiment of the present invention, the electric control unit 3 and the voltage transformation circuit unit 5 are separated in the base 2.

The discharge electrode 4 of the plasma cooker 100 of the present invention is a positive electrode, and when the cookware 200 is a metal cookware, the metal cookware can be directly used as a negative electrode to form a discharge circuit; when the cookware is ceramic cookware, the cooking range 1 is internally provided with a negative electrode independently.

As shown in fig. 5, the utility model discloses plasma kitchen 100's electrical unit 3 is provided with ground connection detection circuit 31 and total electric quantity electric leakage detection circuit 32, whether effective ground connection is protected to all protection ground points that ground connection detection circuit 31 detected plasma kitchen 100, total electric quantity electric leakage detection circuit 32 is used for detecting the difference between the 3 positive negative poles of electrical unit inflow and the outflow current in order to judge whether electric leakage of plasma kitchen 100.

The lead 6 is a fire-earth three-wire lead, a three-wire plug 7 is arranged on the lead 6, and the grounding detection circuit 31 is electrically connected with a protective grounding wire in the three-wire plug 7. The live wire, the zero wire and the ground wire are arranged on the live wire, the zero wire and the ground wire.

Because three-wire plug 7 and ground connection detection circuit 31's combination, in the wiring of going into the house of connecting the commercial power when the user family like this, if do not connect commercial power electric wire netting in protection earth connection (PE), then the utility model discloses a plasma kitchen 100's three-wire plug 7 inserts the socket after, ground connection detection circuit 31 can send detected signal to the protection earth connection in wire 6, when detecting to fail effective ground connection (if detect through feedback voltage or feedback current), then close the electric control unit 3 electric energy of exporting outward, and make the utility model discloses a plasma kitchen 100 can't use. Thus, in some old districts or rural areas where no protective earth wire is installed, the plasma oven 100 of the present invention can perform effective grounding detection to achieve the protective effect.

And simultaneously, the utility model discloses a ground detection circuitry 31 can also carry out effective ground connection to the shell of the metal component of plasma kitchen 100 itself like base 2, kitchen range 1 etc. and with the pan 200 of putting on kitchen range 1 and detect, if do not have effective ground connection, close the use that automatically controlled unit 3 forbids plasma kitchen 100 to the outer output electric energy equally. This prevents electric shock due to ground fault.

The utility model discloses plasma kitchen 100's total electric quantity electric leakage detection circuitry 32 can detect the size of automatically controlled unit 3 "anodal" outflow current, including flowing out to vary voltage circuit unit 5 then to all discharge electrode's current sum, also detect the size of the inflow current of "negative pole" simultaneously, if the negative pole return current that switches on with discharge electrode, current sum such as each earthing device, and judge, if negative pole and each earthing device inflow current sum are less than anodal outflow current, then explain that there is the electric leakage, then automatically controlled unit 3 can cut off the power supply immediately and shut off the fire. Thereby preventing electric shock accidents caused by electric leakage.

As shown in fig. 3 and 4, the utility model discloses still be provided with liftable earthing device 8 in the kitchen range 1 of plasma kitchen 100, liftable earthing device 8 upwards the protrusion be provided with can elasticity go up and down stretch out end 811 be used for with pan bottom elastic contact, stretch out end 811 electric ground connection and be connected with ground connection detection circuitry 31 electricity. The electrical grounding of the protruding end 811 may be to connect to the ground through the grounding point of the circuit board on the electronic control unit 3, or directly connect to the ground through the internal protective grounding terminal of the plasma stove to connect to the protective grounding wire PE, so that the potential is zero.

The end 811 that stretches out of liftable earthing device 8 can be lifted and make elastic contact with the bottom of pan 200, and in the extension scope that stretches out end 811 like this, even lift pan 200 off pan support 11, because the bottom of a boiler still with stretch out end 811 and be protection ground connection, pan 200 is still ground connection like this, does not have the potential safety hazard, if stretch out end 811 and do not effectively ground connection, then ground connection detection circuit 31 can take effect and turn off the power supply. Thirdly, even if the pot 200 is lifted to the highest extending height higher than the extending end 101, the discharging electrode 5 can not discharge towards the bottom of the pot because the bottom of the pot 200 is far enough from the discharging electrode 5, and the pot 200 is safe, so that a user can turn the pot upside down during cooking without potential safety hazards. The maximum protruding height of the protruding end 811 can be designed by experiment, for example, the height of the maximum protruding height of the protruding end 811 from the plane of the discharge electrode 5 is 50mm or more, or the distance of the maximum protruding height of the protruding end 811 from the plane of the discharge electrode 5 is 3 times or more the distance from the discharge electrode 5 to the bottom of the pot or the negative electrode.

Simultaneously, because liftable earthing device 8's safe action, leave pan support 11 back at pan 200, the utility model discloses a plasma kitchen 100 need not to close the fire immediately, has avoided if need "top pot" among the prior art, then cooking utensils need reciprocal close fire in order to guarantee the safety and open a fire and make the heat discontinuous, influence the defect of culinary art.

That is, the utility model discloses a setting of liftable earthing device 8 can make the utility model discloses a plasma kitchen 100 can be safe, normal top pot operation, need not the repetition switch fire.

Thus, the utility model discloses a plasma kitchen 100 has ground connection detection, leakage detection, the multiple protection of lift earthing device and guarantees the safe in utilization of product.

As shown in fig. 5, the electronic control unit 3 of the embodiment of the present invention includes a main control circuit 33, a power circuit 34 electrically connected to the main control circuit 33, and an output terminal of the power circuit 34 is electrically connected to an input terminal of the voltage transformation circuit unit 5; the ground detection circuit 31 and the total electric quantity leakage detection circuit 32 are electrically connected to the main control circuit 33.

The main control circuit 33 can be controlled by a single chip microcomputer in combination with a program, the main control circuit 33 controls the output of the voltage transformation circuit unit 5, and the power supply circuit 34 provides a driving current for the voltage transformation circuit unit 5. The power circuit 34 is connected to the external commercial power through a lead 5 and a three-wire plug 6.

In the embodiment of the present invention, a man-machine interaction panel 21 is further disposed on the base 2 for controlling the plasma oven 100. The man-machine interaction panel 21 may be provided as a key or a touch screen. The base 2 is further provided with a switch button 22 and an adjusting knob 23 for switching on and off the plasma stove 100 and adjusting output power. The man-machine interaction panel 21, the switch keys 22 and the adjusting knob 23 are all electrically connected with the main control circuit 33.

Further, as shown in fig. 1, the wire 6 of the embodiment of the present invention is further provided with a leakage protection switch 9 connected to the three-wire plug 7 and the electronic control unit 3. The arrangement of the leakage protection switch 9 can be matched with the total electric quantity leakage detection circuit 32 to play a role of double leakage protection. The earth leakage switch 9 also has short circuit and overload protection to ensure the utility model discloses the safe in utilization of plasma kitchen 100.

Further, as shown in fig. 5, the lifting grounding device 8 of the present invention is further provided with a highest switch circuit 10 for detecting the extension end 811 at the highest position and electrically connected to the electronic control unit 3. The highest switch circuit 10 is used to detect whether the extending end 811 is at the highest position, and the extending end 811 is at the highest position, which indicates that the pot 200 is detached from the cooking range 1. The highest switch circuit 10 sends the detection information to the electronic control unit 3, the electronic control unit 3 can time the time when the cookware 200 is separated from the cooking range 1, when the separation time reaches the preset time, for example, 20s, the power supply is turned off to shut down the fire, and the accident caused by forgetting to shut down the fire by the user is prevented.

Specifically, as shown in fig. 6 to 8, the cooking range 1 of the plasma cooking range 100 of the present invention further includes an installation casing 12 of the voltage transformation circuit unit 5, the installation casing 12 includes an upper casing 121 and a lower casing 122, the upper casing 121 is provided with an earthing device installation cavity 1210, and an earthing connection line (not shown) is provided in the earthing device installation cavity 1210. The grounding device installation cavity 1210 is used for installing the liftable grounding device 8. The mounting shell 12 protects the transformer circuit unit 5 and can support the lifting grounding device 8, the pot support 11, the discharge electrode 4 and the like on the cooking range 1. Preferably, a temperature sensor 15 is also arranged on the mounting shell 12 and is electrically connected with the electronic control unit 3. The temperature sensor 15 can detect the temperature of the heat generated by the transformer circuit unit 5 or the heat generated by the plasma beam conducted to the mounting housing 12, and when the actual temperature of the mounting housing 12 exceeds the preset temperature during the operation, the power supply of the transformer circuit unit 5 is cut off, so that the transformer circuit unit 5 stops outputting the electric energy to the discharge electrode to stop the discharge operation, thereby ensuring the use safety.

Preferably, as shown in fig. 2, the base 2 of the embodiment of the present invention is further provided with a heat dissipation fan 16 facing the side wall of the mounting housing 12, and an air inlet 17 and an air outlet 18 for supplying air to and from the heat dissipation fan 16. Therefore, heat generated by the voltage transformation circuit unit 5 can be quickly blown out of the base 2, and the heat dissipation effect of the whole machine is ensured.

As shown in fig. 6, the mounting housing 12 is also provided with an incoming wiring port 191 and an earth wiring port 192. The incoming line connection port 191 is used to connect the voltage transformation circuit unit 5 and the power supply circuit 34. The ground wiring port 192 is used to protect the metal case from ground. For the insulation between the discharge electrodes 4 and the insulation of the connection line between the discharge electrodes 4 and the voltage transformation circuit unit 5, preferably, the upper case 121 of the embodiment of the present invention is made of a plastic insulating material.

The utility model discloses a liftable earthing device 8 includes pedestal 82, sets up the sleeve 83 in pedestal 82, installs in sleeve 83 and butt sleeve 83 and base 82's spring 84, and the lifter 81 in spring 84 is located to the cover, and the upper end of lifter 81 is worn out for stretching out end 811 sleeve 83, pedestal 82 be fixed in the earthing device installation cavity 1210 of epitheca 121 and with the ground connection line is connected. The lift lever 81 is lifted and lowered by the spring 84 to slide up and down in the sleeve 83. Meanwhile, because the lifting rod 81 is sleeved in the spring 84, the spring 84 abuts against the base 82, the base 82 is connected with a grounding connecting line to realize grounding, the spring 84, the lifting rod 81 and the sleeve 83 are all electrically grounded, the cooker 200 is placed on the cooker support 11 and is grounded when being contacted with the extending end 811 of the lifting rod 81, and the lifting rod 81 is elastically lifted in the range of the lowest position and the highest position arranged in the sleeve 83, so that the cooker 200 is elastically contacted with the extending end 811 of the lifting rod 81 when being lifted in the range of the lowest position and the highest position, and the cooker 200 can be effectively grounded when being overturned in the range of the lowest position and the highest position, thereby ensuring the safety of a cooker operator.

Preferably, as shown in fig. 8, the portion of the upper end of the sleeve 83 exposed out of the upper shell 121 is further sleeved with a ceramic protection tube 85, the ceramic protection tube 85 is sleeved outside the sleeve 83, and the discharge electrode 4 on the upper shell 121 is prevented from discharging metal and wires in the liftable grounding device 8 to cause abnormal discharge of the product.

The utility model discloses sleeve 83 top still is provided with direction mouth 86, the upper end of lifter 81 is worn to locate direction mouth 86. The extending end 811 of the lifting rod 81 penetrates through and is exposed out of the guide nozzle 86, and the guide nozzle 86 is used for guiding the lifting rod 81 and preventing the lifting rod 81 from shaking left and right in the lifting process to influence the contact with the pot bottom. Preferably, the guide nozzle 86 is made of an insulating material such as ceramic or plastic.

Specifically, the utility model discloses highest position switch circuit 10 is including fixing the first electrode piece 87 on the inside top of sleeve 83 and fixing the second electrode piece 88 in lifter 81 bottom, second electrode piece 88 along with lifter 81 rebound, when upwards stretching out the arrival highest position of end 811, second electrode piece 88 and first electrode piece 87 contact, highest position switch circuit 10 switches on and sends signal to main control circuit 33 this moment, main control circuit 33 begins to time in order to calculate the time that pan 200 breaks away from end 811, whether to shut off the fire in order to decide.

Please continue to refer to fig. 6, further, the upper surface of the upper shell 121 of the plasma cooker 100 of the present invention is provided with a first wire groove 1211 communicated with the grounding device installation cavity 1210, for laying a grounding connection wire connected with the grounding device 8, two sides of the first wire groove 1211 and the periphery of the grounding device installation cavity 1210 are further respectively provided with a first resistance groove 1212, and the first wire groove 1211 and the first resistance groove 1212 are filled with an insulating glue for resistance. The first wire slot 1211 is used for leading out a ground wire of the liftable grounding device. When the transformer circuit unit 5 is connected to the discharge electrodes 4, a plurality of wires are required to be disposed above the upper case 121 to be connected to the bottom of the discharge electrodes 4, and the wires and the discharge electrodes 4 are charged with positive polarity, and a grounding connection wire with negative polarity is disposed in the first wire slot 1211, which is easy to cause the discharge electrodes 4 to discharge to the ground wire in the first wire slot 1211, so that a layer of first resistive slot 1212 is further disposed on both sides of the first wire slot 1211 and on the periphery of the grounding device mounting cavity 1210, and an insulating glue is disposed in the first wire slot 1211 and the first resistive slot 1212 for preventing abnormal discharge, thereby preventing the normal use of the product from being affected by abnormal discharge.

Referring to fig. 3, preferably, the cooking range 1 of the plasma cooking range 100 of the present invention further includes a high temperature-resistant insulating plate 13 located above the installation case 12, wherein the high temperature-resistant insulating plate 13 is installed with the plurality of discharge electrodes 4.

In the embodiment of the utility model provides an in, the epitheca 121 of installation casing 12 supports high temperature resistant insulation board 13 and pan support 11. The high temperature insulation board 13 can prevent the heat loss of the pan bottom on one hand, and can prevent the heat from flowing downwards to the installation shell 12 on the other hand, so as to prevent the temperature of the installation shell 12 from being too high to influence the transformation circuit unit 5 therein. Meanwhile, the high temperature-resistant insulating plate 13 is also used for mounting and supporting the plurality of discharge electrodes 4.

Preferably, a negative electrode 14 for forming a discharge loop with the plurality of discharge electrodes 4 is further disposed above the high temperature resistant insulating plate 13.

The embodiment of the utility model provides a set up negative electrode 14 alone, like this in the use, pan 200 no longer is as the partly of electric return circuit, has changed the method that some present plasma kitchen 100 its plasma beam produced between "discharge electrode" and "pot", let plasma beam produce between "discharge electrode" and "negative electrode", thereby realize that metal and non-metal pan all can the utility model discloses plasma kitchen 100 is last to be used, when having avoided using the pot to be the negative pole simultaneously, and plasma directly hits the bottom of a boiler, causes the pan to puncture under the long-time effect, influences the problem of pan life-span.

Further, with reference to fig. 6, the upper surface of the upper shell 121 of the embodiment of the present invention is further provided with a negative pole support installation cavity 1213 and a communicating part, the second wire groove 1214 of the negative pole support installation cavity 1213 is used for laying a negative pole connecting wire (not shown) connected to the negative pole 14, the second resistance groove 1215 is further provided on two sides of the second wire groove 1214 and the periphery of the negative pole support installation cavity 1213, and the second wire groove 1214 and the second resistance groove 1215 are filled with an insulating glue for resistance. The negative support mounting cavity 1213 is used to house a mounting seat for supporting the negative electrode 14. The negative connecting wire is connected with the power ground of the electronic control unit 3.

The second wire groove 1214 is used to lead out a negative connection wire of the negative electrode 14. Similarly, since the plurality of leads and the discharge electrode 4 are disposed above the upper case 121, the leads and the discharge electrode 4 are charged with positive polarity, the negative connecting wire is disposed in the second wire slot 1214, and the discharge electrode 4 is easily discharged to the negative connecting wire in the second wire slot 1214, a layer of second resistive slot 1215 is disposed on two sides of the second wire slot 1214 and on the periphery of the negative holder mounting cavity 1213, and an insulating adhesive is disposed in the second wire slot 1214 and the second resistive slot 1215 to prevent the discharge, thereby preventing the normal use of the product from being affected by the abnormal discharge.

The embodiment of the utility model provides a safe type plasma kitchen 100, through set up liftable earthing device 8 in cooking range 1, make the end 811 and pan 200 bottom elastic contact that stretch out of lift earthing device 8, when top pot operation like this, even pan 200 breaks away from the cooking range and does not have under the condition of turning off the fire, pan 200 still can be through with the effective ground connection of contact that stretches out the end, once more, when pan 200 upwards breaks away from when stretching out the end again, have had enough big distance and make the discharge electrode can not discharge to the bottom of a boiler again and guarantee safety between bottom of a boiler and the discharge electrode. The utility model discloses still detect external commercial power and whether effective ground connection of cooking utensils shell through setting up three-way plug 6 and ground connection detection circuitry 31. Meanwhile, a total electric quantity leakage detection circuit 32 is further arranged to effectively detect whether the electric leakage exists in the power utilization process of the cooker. Thus, the utility model discloses a plasma kitchen 100 has ground connection detection, leakage detection, the multiple protection of lift earthing device and guarantees the safe in utilization of product, and it can carry out the top pot operation safely.

The above only for the purpose of clearly illustrating the examples of the present invention, not limiting the scope of the present invention, can't be exhausted to all the embodiments, all the concepts of the present invention, utilize the equivalent structure transformation of the content of the technical solution of the present invention, or directly/indirectly use in other related technical fields and are all included in the protection scope of the present invention.

Claims (10)

1. A safety plasma stove comprises a base, a stove head arranged on the base and an electric control unit arranged in the base, wherein a plurality of discharge electrodes exposed above the base are arranged in the stove head;

it is characterized in that the preparation method is characterized in that,

the electric control unit is provided with a grounding detection circuit and a total electric quantity leakage detection circuit, the grounding detection circuit detects whether all protection grounding points of the plasma stove are effectively grounded, and the total electric quantity leakage detection circuit is used for detecting the difference between the inflow current and the outflow current of the positive electrode and the negative electrode of the electric control unit so as to judge whether the plasma stove leaks electricity;

the lead is a fire-earth three-wire lead, a three-wire plug is arranged on the lead, and the grounding detection circuit is electrically connected with a protective grounding wire in the three-wire plug;

but still be provided with lifting earthing device in the kitchen range, lifting earthing device upwards the protrusion be provided with the end that stretches out that can rise elastically and be used for with pan bottom elastic contact, stretch out end electric property ground connection and be connected with ground connection detection circuit electricity.

2. The safety plasma cooker according to claim 1, wherein a leakage protection switch is further disposed on the wire to connect the three-wire plug and the electric control unit.

3. The safety plasma stove according to claim 1, wherein the liftable grounding device is further provided with a highest switch circuit for detecting that the extension end is at the highest position, and the highest switch circuit is electrically connected with the electric control unit.

4. The safety plasma stove according to claim 1, wherein the electric control unit comprises a main control circuit, a power circuit electrically connected with the main control circuit, and an output end of the power circuit is electrically connected with an input end of the voltage transformation circuit unit;

the grounding detection circuit and the total electric quantity leakage detection circuit are electrically connected with the main control circuit.

5. The safety plasma stove according to claim 3, wherein the stove head further comprises a mounting housing for mounting the voltage transformation circuit unit, the mounting housing comprises an upper shell and a lower shell, the upper shell is provided with a grounding device mounting cavity, and a grounding connecting wire is arranged in the grounding device mounting cavity;

the lifting grounding device comprises a seat body, a sleeve arranged in the seat body, a spring arranged in the sleeve and abutted against the sleeve and the base, and a lifting rod sleeved in the spring, wherein the upper end of the lifting rod penetrates out of the sleeve for extending out, and the seat body is fixed in a grounding device mounting cavity of the upper shell and connected with the grounding connecting wire.

6. The safety plasma stove according to claim 5, wherein a ceramic protection pipe is further sleeved on the part of the upper end of the sleeve exposed out of the upper shell;

the sleeve top still is provided with the direction mouth, the upper end of lifter wears to locate the direction mouth.

7. The safety plasma stove according to claim 5, wherein a first wire groove communicated with the grounding device installation cavity is formed in the upper surface of the upper shell and used for laying a grounding connecting wire connected with the liftable grounding device in a grounding mode, first resistance grooves are further formed in two sides of the first wire groove and the periphery of the grounding device installation cavity, and insulating glue for resistance electricity is filled in the first wire groove and the first resistance grooves.

8. The safety plasma cooker according to claim 5, wherein the burner further includes a high temperature-resistant insulating plate over the mounting case, the high temperature-resistant insulating plate mounting the plurality of discharge electrodes.

9. The safety plasma stove according to claim 8, wherein a negative electrode for forming a discharge loop with a plurality of discharge electrodes is further arranged above the high-temperature-resistant insulating plate;

the upper surface of the upper shell is also provided with a negative support mounting cavity and a second wire groove communicated with the negative support mounting cavity, and the second wire groove is used for laying a negative connecting wire connected with the negative electrode, the two sides of the second wire groove and the periphery of the negative support mounting cavity are also provided with second resistance grooves, and insulating glue for resistance is filled in the second wire groove and the second resistance grooves.

10. The safety plasma cooker according to claim 5, wherein a temperature sensor is further disposed on the mounting housing and electrically connected to the electronic control unit.

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