CN112834954A

CN112834954A - Plasma kitchen range with pan detects and ground protection

Info

Publication number: CN112834954A
Application number: CN202110127244.6A
Authority: CN
Inventors: 李峰
Original assignee: Zhejiang Banai Plasma Technology Co ltd
Current assignee: Zhejiang Banai Plasma Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-05-25
Anticipated expiration: 2041-01-29
Also published as: CN112834954B

Abstract

The invention discloses a plasma stove with pot detection and ground protection, which comprises a base, a stove head and a power control circuit, wherein the stove head comprises a high-voltage bag, an electrode mounting plate, a plurality of discharge electrodes arranged on the electrode mounting plate and a pot support ring arranged on the high-voltage bag; a plurality of elastic contacts protruding upwards are arranged on the cookware support ring at intervals in the circumferential direction; the high-voltage package is also provided with a grounding probe, the grounding probe is provided with a needle rod capable of elastically lifting, and the needle rod upwards penetrates out of the electrode mounting plate; the power control circuit is provided with a cooker detection circuit, and the elastic contact and the grounding probe are electrically connected with the cooker detection circuit. The invention enables the cooker to be moved on the plasma stove without turning off fire, is convenient for cooking operation, and ensures that the product can be well grounded through the elastic contact and the grounding probe.

Description

Plasma kitchen range with pan detects and ground protection

Technical Field

The invention relates to the technical field of cookers, in particular to a plasma cooker with cookware detection and ground protection.

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 pan on the plasma kitchen among the prior art detects the design unreasonable, and the pan moves slightly on the cooking utensils and will break away from the contact with the pan lock ring on the kitchen range, then will cut off the power supply flame-out at once, leads to the user to cook the operation well like this, can't remove the pan. What is more feared is that in the prior art, the condition that the control circuit is turned off after the grounding of the cookware is disconnected may occur in the cookware detection design of the plasma cooker, so that a user may get an electric shock, and potential safety hazards are caused.

2. The existing plasma stove is grounded after being contacted with a pan supporting ring arranged on a cooking range, but because the contact surface of a pan and the pan supporting ring is an inclined plane, poor contact is easy to generate, and the existing plasma stove cannot be effectively grounded, so that the use safety is influenced.

Therefore, the prior art has yet to be improved.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a plasma cooker with cookware detection and ground protection, which aims to ensure that the cookware can be moved on the cooker at will without flameout, and the product can be well grounded by a liftable ground probe arranged in the center of a cooker head to ensure the use safety; moreover, even if the fire is turned off, the electric shock danger of a user is not caused because the lifting grounding probe always keeps the grounding of the cookware in the stroke range; furthermore, through the reasonable stroke design of the liftable grounding probe, a user can slightly toss the pot (the wok tossing means lifting the pot and jolting repeatedly to enable the cooked food to be heated fully) without flameout, so that better cooking experience is achieved.

In order to realize the purpose, the invention adopts the following technical scheme:

a plasma cooker with pot detection and ground protection comprises a base, a cooking range head arranged on the base, and a power control circuit arranged on the base, wherein,

the cooking range comprises a high-voltage bag, an electrode mounting plate covered above the high-voltage bag, a plurality of discharge electrodes arranged on the electrode mounting plate, and a cooker support ring arranged on the high-voltage bag and surrounding the discharge electrodes, wherein a high-voltage circuit is arranged in the high-voltage bag and electrically connected with the discharge electrodes and a power supply control circuit;

a plurality of elastic contacts protruding upwards are arranged on the cookware support ring at intervals in the circumferential direction;

the high-voltage package is also provided with a grounding probe, the grounding probe is provided with a needle rod capable of elastically lifting, and the needle rod upwards penetrates out of the electrode mounting plate;

the power control circuit is provided with a cooker detection circuit, and the elastic contact and the grounding probe are electrically connected with the cooker detection circuit.

The grounding probe comprises a sleeve, a cover body, a needle rod, a reset spring, a ceramic sleeve and a lead-out wire, wherein the cover body is covered at the top end of the sleeve;

the lower end of the sleeve is fixed on the high-voltage pack, and the upper ends of the sleeve, the ceramic sleeve and the needle rod penetrate out of the electrode mounting plate;

a first anti-creeping clearance is arranged between the ceramic sleeve and the cover body, and a second anti-creeping clearance is arranged between the ceramic sleeve and the outer wall of the upper part of the sleeve.

And a third creepage preventing gap is formed between the position where the electrode mounting plate is penetrated through by the outer wall of the ceramic sleeve and the electrode mounting plate.

And the third creepage preventing gap is hermetically filled with a sealant.

And the outer wall of the lower part of the sleeve is annularly provided with an assembling boss for tightly matching with the inner wall of the lower part of the ceramic sleeve.

The needle rod sequentially comprises a cuspate head, a first rod body and a second rod body, wherein the diameter of the second rod body is smaller than that of the first rod body;

the telescopic bottom is inwards extended and is provided with the taper pipe and is used for wearing out the second body of rod, the lower part joint of the first body of rod has the E shape jump ring, reset spring is conical spring, and its upper end and E shape jump ring butt, its lower extreme and the bottom butt of taper pipe.

The high-voltage pack comprises an insulating support and a shielding shell which is positioned at the lower end of the insulating support and connected with the insulating support, and the high-voltage circuit is arranged in the shielding shell;

the upper end surface of the insulating support is provided with a probe mounting blind hole in a downward sunken mode, and the lower portion of the sleeve is provided with a mounting table fixed to the bottom of the probe mounting blind hole;

the insulating support outwards extends in the lateral wall of probe installation blind hole and is provided with the trough, the bottom of trough is provided with the card wire casing and is used for the joint to lay the lead-out wire, the trough is filled with insulating cement and is sealed.

The cooker support ring is electrically connected with the cooker detection circuit, the elastic contacts are arranged on the cooker support ring at equal intervals, each elastic contact comprises a cylindrical shell, a contact, a lifting spring and a limiting piece, the cylindrical shell is arranged in the shell and moves up and down relative to the shell, the lifting spring is arranged in the shell and abuts against the contact and the shell at the upper end and the lower end of the lifting spring respectively, the limiting piece.

The electrode mounting plate comprises an electrode mounting plate body, wherein a heat dissipation cavity is formed between the bottom end face of the electrode mounting plate body and the upper end face of an insulating support at intervals, and a heat dissipation opening communicated with the outside and the heat dissipation cavity is formed in the side wall of the insulating support.

The electrode mounting plate comprises a protective layer, a first electric shock resistant layer, a high temperature resistant heat insulation layer and a second electric shock resistant layer, wherein the protective layer is sequentially attached to the electrode mounting plate from top to bottom.

According to the plasma cooker with the functions of pot detection and ground protection, the plurality of elastic contacts are arranged on the pot supporting ring of the cooking range, the ground probe is arranged on the high-pressure bag of the cooking range, the liftable needle rod of the ground probe is contacted with the bottom surface of a pot, and the elastic contacts and the ground probe are electrically connected with the pot detection circuit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 diagram of a plasma cooker with pot detection and ground protection according to a first embodiment of the present invention;

FIG. 2 is a schematic circuit diagram of a first embodiment of the present invention with a dual ground protection structure;

FIG. 3 is a schematic view showing a grounding probe of the plasma cooker contacting with the bottom surface of the pot according to the present invention;

FIG. 4 is an exploded view of the structure of FIG. 1;

FIG. 5 is a schematic structural view of the cooking range of FIG. 4;

FIG. 6 is an exploded view of the structure of FIG. 5;

FIG. 7 is an exploded view of the pot support ring and the pop-up grounding contact;

FIG. 8 is a schematic cross-sectional view of the cooking range with the pan support ring removed;

FIG. 9 is an enlarged schematic view at A of FIG. 8;

FIG. 10 is a schematic structural diagram of a ground probe;

FIG. 11 is an exploded view of the structure of FIG. 10;

FIG. 12 is a schematic structural view of the upper end face of the insulating support;

FIG. 13 is an enlarged schematic view at B of FIG. 12;

FIG. 14 is a schematic structural view of a spring contact;

fig. 15 is a schematic cross-sectional view of a spring contact.

Description of reference numerals:

100-plasma cooker, 1-base, 2-cooking range, 3-power control circuit, 31-pot detection circuit, 4-high voltage package, 41-insulating support, 411-probe installation blind hole, 412-wiring groove, 4121-wiring groove, 413-heat dissipation port, 42-shielding shell, 43-connecting column, 5-electrode installation plate, 51-protective layer, 52-first electric shock resistant layer, 53-high temperature resistant heat insulation layer, 54-second electric shock resistant layer, 6-discharge electrode, 7-pot support ring, 8-high voltage circuit, 9-elastic contact, 91-shell, 92-touch, 93-lifting spring, 94-spacing piece, 10-grounding probe, 11-needle rod, 111-head, 112-first rod body, 113-a second rod body, 114-an E-shaped clamp spring, 12-a sleeve, 121-an assembly boss, 122-a taper pipe, 123-a mounting table, 13-a cover body, 14-a reset spring, 15-a ceramic sleeve, 16-a leading-out wire, 17-a first anti-creeping clearance, 18-a second anti-creeping clearance, 19-a third anti-creeping clearance, 20-a heat dissipation cavity, 21-a plug, 22-a man-machine interaction panel, 23-a heat dissipation fan and 200-a cooker.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, 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 movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "connected" may be fixedly connected, detachably connected, or integrally formed; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating 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 8, the present invention provides a plasma cooker 100 with pot detection and ground protection, including a base 1, a cooking range 2 disposed on the base 1, and a power control circuit 3 disposed on the base 1, wherein the cooking range 2 includes a high voltage pack 4, an electrode mounting plate 5 covering the high voltage pack, a plurality of discharge electrodes 6 mounted on the electrode mounting plate 5, and a pot support ring 7 mounted on the high voltage pack 4 and surrounding the plurality of discharge electrodes 6, and a high voltage circuit 8 disposed in the high voltage pack 4 and electrically connected to the discharge electrodes 6 and the power control circuit 3. The base 1 is used for installing the cooking range 2 and the power supply control circuit 3 and plays a supporting role. The base 1 may be formed by combining upper and lower housings made of plastic. The pot supporting ring 7 of the present invention is used for placing and supporting the pot 200.

The power control circuit 3 is used for generating a driving power required by the high-voltage package 4 and controlling the high-voltage circuit 8 in the high-voltage package 4 to be switched on and off to output power or stop power output. The driving power supply generated by the power supply control circuit 3 is a high-frequency or low-frequency low-voltage power supply, the high-voltage circuit 8 in the high-voltage bag 4 converts the low voltage input by the power supply control circuit 3 into high voltage and outputs the high voltage to the discharge electrode 6 for discharging, and the electric arc generated by the discharge electrode 6 is used for ionizing air to generate plasma to heat the bottom of the pot. In the embodiment of the present invention, the power control circuit 3 is connected to an external power source through a plug 21.

The control of the power control circuit 3 can be realized by combining a single chip microcomputer with a program.

The discharge electrode 6 of the plasma cooker 100 of the present invention directly discharges electricity to the pots, so that the pots 200 of the present invention need to use metal pots.

In the embodiment of the present invention, a man-machine interaction panel 22 is further disposed on the base 1 for controlling the plasma stove 100. The man-machine interaction panel 9 may be provided as a key or a touch screen.

Preferably, the base 1 of the plasma cooker 100 of the present invention may further be provided with a heat dissipation fan 23, and an air inlet and an air outlet for supplying air to and discharging air from the heat dissipation fan 23. Therefore, heat generated by the high-voltage pack 4 can be quickly blown out of the base 1, and the heat dissipation effect of the whole machine is ensured.

As shown in fig. 7, a plurality of upwardly protruded elastic contacts 9 are circumferentially spaced on the pot support ring 7 of the plasma cooker 100 of the present invention. The pan support ring 7 of the invention is electrically connected with the pan detection circuit, and the elastic contact 9 can be directly electrically connected with the pan detection circuit or electrically connected with the pan detection circuit through the pan support ring 7. It can be understood that the pot supporting ring 7 can also be electrically connected with the pot detection circuit through the elastic contact 9. The elastic contact 9 of the invention is convexly arranged on the cooker support ring 7, so the elastic contact 9 is higher than the cooker support ring 7, and simultaneously, the elastic contact is elastically arranged and can be lifted up and down, so even if the contact surface of the cooker 200 and the cooker support ring 7 is an inclined surface, the elastic contact 9 higher than the cooker support ring 7 can be well contacted with the inclined surface of the bottom of the cooker, the cooker 200 on the plasma cooker 100 can be well contacted all the time, and the use safety is ensured.

Referring to fig. 3 and 8, the high-pressure bag of the plasma cooker 100 of the present invention is further provided with a ground probe 10, wherein the ground probe 10 is provided with a needle bar 11 capable of elastically lifting, and the needle bar 11 extends upward out of the electrode mounting plate 5. As shown in fig. 3, the needle bar 11 is extended out of the electrode mounting plate 5 and contacts with the bottom surface of the pot 200. As shown in fig. 2, the power control circuit 3 of the present invention is provided with a pot detection circuit 31, and the elastic contact 9 and the grounding probe 10 are electrically connected to the pot detection circuit 31. The ground probe 10 of the present invention is electrically grounded.

Because the grounding probe 10 is provided with the liftable needle rod 11, the top end of the needle rod 11 is contacted with the bottom surface of the cooker 200, in this way, in the extension range of the needle rod 11, even if the cooker 200 is lifted away from the cooker support ring 7, because the cooker bottom is also contacted with the needle rod 11, and the needle rod 11 is grounded, the cooker 200 is grounded without potential safety hazard, and again, even if the cooker 200 is lifted away from the cooker support ring higher than the highest extension height of the needle rod 11, the cooker bottom of the cooker 200 is far enough away from the discharge electrode 6 at the moment, the discharge electrode 5 cannot discharge towards the cooker bottom, the cooker 200 at the moment is also safe, so that a user can turn the cooker during cooking without potential safety hazard. The highest projecting height of the needle bar 11 can be designed by experiments, for example, the height of the highest projecting height of the needle bar 11 from the plane of the discharge electrode 6 is 50mm or more. Through reasonable stroke design of the liftable grounding probe, the situation that the control circuit is turned off after grounding is disconnected is completely avoided, so that the use safety is ensured; furthermore, through the reasonable stroke design of the liftable grounding probe, a user can slightly toss the pot (the wok tossing means lifting the pot and jolting repeatedly to enable the cooked food to be heated fully) without flameout, so that better cooking experience is achieved.

The pot detection circuit 31 of the present invention detects whether a pot 200 is placed on the plasma cooker 100, and judges by detecting whether the liftable needle bar 11 of the ground probe 10 is connected to the pot support ring 7 or not, and the elastic contact 9, and the power control circuit 3 controls to turn off the power of the plasma cooker 100 once the pot 200 is connected to or disconnected from the liftable needle bar 11 and the pot support ring 7.

Preferably, at least 3 elastic contacts 9 of the pot support ring 7 are arranged at equal intervals, so that the pot 200 can be stably supported, and meanwhile, the pot 200 can be in good contact with the pot support ring 7, even if the pot 200 is slightly moved on the pot support ring 7, the pot 200 can still be electrically connected with the pot detection circuit.

When the cookware 200 is placed on the plasma cooker 100, the bottom surface of the cookware 200 is in elastic contact with the lifting needle rod 11 of the grounding probe 10, and the bottom surface of the cookware 200 is also in contact with the cookware support ring 7 (on which at least 3 elastic contacts are arranged), which is equivalent to the cookware 200 electrically connecting the lifting needle rod 11 with the cookware support ring 7, and the cookware is detected by the cookware detection circuit 31 to be stolen, and then the cookware is fed back to the power control circuit 3 to signal that the cookware 200 is placed on the plasma cooker 100, and the control circuit receives the firing instruction, otherwise, the control circuit does not receive the firing instruction. By judging whether the cookware 200 is on the plasma cooker 100 or not in this way, once the cookware 200 completely leaves the plasma cooker 100, the fire is turned off immediately to realize safe use.

Thirdly, as the grounding probe 10 is provided with the liftable needle rod 11, then the elastic contact 9 can be lifted elastically, and the top end of the needle rod 11 and the top end of the elastic contact 9 are contacted with the bottom surface of the cooker 200, so long as the cooker 200 can be freely moved on the plasma cooker 100 and slightly overturns the cooker within the elastic extension range of the needle rod 11 and the elastic contact 9, the plasma cooker 100 keeps working continuously without turning off fire, thus the plasma cooker of the invention is convenient for the cooking operation of users. In the embodiment of the present invention, the maximum protruding height of the needle bar 11 can be designed through experiments, for example, the height of the maximum protruding height of the needle bar 11 from the plane of the discharge electrode 6 is greater than or equal to 50 mm.

Preferably, the power supply control circuit 3 of the present invention further includes a leakage detecting circuit. The leakage detection circuit detects whether there is leakage in the base 1, the cooking range 2, and the like, and the pot 200, and the like, and once the leakage occurs, the power control circuit 3 controls to turn off the power of the plasma cooking range 100. Thereby ensuring the use safety.

Specifically, as shown in fig. 9 to 11, the ground probe 10 of the present invention includes a sleeve 12, a cover 13 covering the top end of the sleeve 12, the needle rod 11 axially passing through the cover 13 and the sleeve 12, a return spring 14 sleeved outside the needle rod 11 and having upper and lower ends respectively abutting against the needle rod 11 and the sleeve 12, a ceramic sleeve 15 sleeved outside the sleeve 12, and a lead 16 connected to the needle rod 11. The lower end of the sleeve 12 is fixed on the high-voltage package 4, and the upper ends of the sleeve 12, the ceramic sleeve 15 and the needle rod 11 penetrate out of the electrode mounting plate 5. The upper end opening of the sleeve 12 is connected with the cover 13 by screw thread, and the leading-out wire 16 is connected with the pot detection circuit 31.

After the top end of the needle rod 11 contacts with the pan bottom, the pot 200 presses down to make the needle rod 11 move downwards on the sleeve 12, the downward movement of the needle rod 11 causes the return spring 14 to compress, and the return spring 14 makes the needle rod 11 always keep contact with the pan bottom. Meanwhile, the needle bar 11 is electrically connected with the outgoing line 16, so that the pot 200 is grounded after the pot bottom is contacted with the needle bar 11. The ceramic sleeve 15 is sleeved outside the sleeve 12, and prevents the discharge electrode 6 of the electrode mounting plate 5 from directly discharging to the sleeve 12 of the grounding probe 10.

Preferably, as shown in fig. 9, a first anti-creeping gap 17 is provided between the ceramic bushing 15 and the cover 13, and a second anti-creeping gap 18 is provided between the ceramic bushing 15 and the outer wall of the upper portion of the sleeve 12. Due to the arrangement of the first anti-creeping gap 17 and the second anti-creeping gap 18, when the discharge electrode 6 on the electrode mounting plate 5 discharges to the sleeve 12, it is required to extend downwards along the top end surface of the ceramic bushing 15 and the surface of the inner wall of the ceramic bushing 15 to the joint of the lower part of the ceramic bushing 15 and the sleeve 12, which is equivalent to increase the creepage distance between the discharge electrode 6 and the sleeve 12 to prevent creepage.

Further, a third creepage preventing gap 19 is provided between the electrode mounting plate 5 and the position where the outer wall of the ceramic bushing 15 of the present invention penetrates through the electrode mounting plate 5. Thus, the creepage distance can be further increased to prevent creepage.

Preferably, the third creepage preventing clearance 19 of the present invention is sealingly filled with a sealant. The electrode mounting plate 5 and the high-voltage package 4 below are sealed by the sealant, so that sundries on the cooking range 2 are prevented from entering the high-voltage package 4, and heat can be prevented from being conducted downwards along the gap.

As shown in fig. 11, the outer wall of the lower portion of the sleeve 12 of the present invention is provided with a fitting projection 121 for tight fitting with the inner wall of the lower portion of the ceramic bushing 15. The fitting bosses 121 facilitate the positioning and installation of the ceramic bushing 15.

Specifically, the needle shaft 11 of the present invention includes, from top to bottom, a pointed tooth-shaped head 111, a first rod 112 and a second rod 113 having a smaller diameter than the first rod 112. The bottom of the sleeve 12 extends inwards to be provided with a taper pipe 122 for penetrating out of the second rod body 113, the lower part of the first rod body 112 is clamped with an E-shaped clamp spring 114, the return spring 14 is a conical spring, the upper end of the return spring is abutted against the E-shaped clamp spring 114, and the lower end of the return spring is abutted against the bottom of the taper pipe 122.

The pointed head 111 can increase the contact area with the bottom of the pan. The taper tube 122 supports and guides the return spring 14.

Referring to fig. 6, the high voltage package 4 of the present invention includes an insulating support 41 and a shielding shell 42 located at a lower end of the insulating support 41 and connected to the insulating support 41, wherein the high voltage circuit 8 is disposed in the shielding shell 42. The insulating support 41 and the shielding shell 42 form a closed cavity for installing the high-voltage circuit 6, so as to play a role in shielding and protecting.

As shown in fig. 8 to 10, the upper end surface of the insulating support 41 is recessed downward to form a probe mounting blind hole 411, and the lower portion of the sleeve 12 is provided with a mounting block 123 fixed to the bottom of the probe mounting blind hole 411. In the embodiment of the present invention, the probe mounting blind hole 411 is provided with a connection column, the mounting platform 123 is provided with a connection hole, and the connection column and the connection hole are connected by a screw. The bottom surface of the probe mounting blind hole 411 is blind, i.e., not in communication with the inside of the shield case 42.

Further, as shown in fig. 12 and 13, the insulating support 41 of the present invention is provided with a wiring groove 412 extending outward from a side wall of the probe mounting blind hole 411, a wire clamping groove 4121 is provided at a bottom of the wiring groove 412 for clamping and laying the outgoing line 16, and the wiring groove 412 is filled with an insulating glue for sealing.

The lead-out wire 16 is laid exclusively in the wiring groove 412 and sealed by an insulating paste, so that the discharge electrode 6 on the electrode mounting board 5 is prevented from discharging to the lead-out wire 16. Meanwhile, the lead-out wire 16 is clamped at the bottom of the wiring groove 412 by the clamping groove 4121, so that the lead-out wire 16 is prevented from being lifted in the gluing process, and the distance between the lead-out wire 16 and the discharge electrode 5 is shortened to cause discharge.

As shown in fig. 14 and 15, each of the elastic contacts 9 of the present invention includes a cylindrical housing 91 mounted on the pot support ring 7, a contact 92 mounted in the housing 91 and moving up and down relative to the housing, a lifting spring 93 mounted in the housing 91 and having upper and lower ends respectively abutting against the contact 92 and the housing 91, and a stopper 94 located outside the housing 91 and mounted on the bottom of the contact. The pot supporting ring 7 is electrically connected with the pot detection circuit 31. After the elastic contact 9 is arranged on the cooker support ring 7, the elastic contact 9 and the cooker support ring 7 are electrically grounded. The stopper piece 94 is used to prevent the contact 92 from coming out of the housing 91 during the upward reset process.

Preferably, as shown in fig. 5 and 8, a heat dissipation cavity 20 is formed between the bottom end surface of the electrode mounting plate 5 and the upper end surface of the insulating support 41 at an interval, and a heat dissipation port 413 for communicating the outside with the heat dissipation cavity 20 is formed on the side wall of the insulating support 41. Can accelerate 2 inside heat dissipations of kitchen range like this, promote the radiating effect.

Preferably, as shown in fig. 9, the electrode mounting plate 5 of the embodiment of the present invention includes a protective layer 51, a first electric shock resistant layer 52, a high temperature resistant thermal insulation layer 53, and a second electric shock resistant layer 54, which are sequentially attached from top to bottom.

The protective layer 51 is used to prevent impurities, such as water, oil, dishes, etc., from falling into the cooking range 2 during cooking, which is difficult to clean and affects the use. While the protective layer 51 is positioned at the uppermost layer, which is directly exposed under the discharge electrode 6, the protective layer 51 can prevent a part of heat from being transferred downward.

The high temperature resistant heat insulation layer 53 is mainly used for heat insulation, and prevents heat generated at the discharge electrode 6 in the cooking range 2 from being conducted to the high-voltage circuit 8 in the high-voltage bag 4 to affect the performance of the high-voltage circuit 8.

Since the plurality of discharge electrodes 6 are arranged on the high-temperature-resistant heat-insulating layer 53 in a penetrating manner, if the discharge arc between the discharge electrodes 6 directly acts on the high-temperature-resistant heat-insulating layer 53, the high-temperature-resistant heat-insulating layer 53 is easily damaged by electric shock, and the service life is affected. According to the invention, the upper surface and the lower surface of the high-temperature-resistant heat-insulating layer 53 are respectively provided with the first electric shock-resistant layer 52 and the second electric shock-resistant layer 54 in a bonding manner. Thereby preventing the high temperature resistant heat insulating layer 53 from being damaged by electric shock, so that the electrode mounting plate 5 of the present invention realizes both good heat insulation and prevention of electric shock damage.

According to the plasma cooker 100 with the pot detection and ground protection provided by the embodiment of the invention, the plurality of elastic contacts 9 are arranged on the pot support ring 7 of the cooker head 2, the ground probe 10 is arranged on the high-voltage bag 4 of the cooker head 2, the ground probe 10 is provided with the liftable needle rod 11 which is contacted with the bottom surface of the pot 200, and the elastic contacts 9 and the probe 10 are electrically connected with the pot detection circuit 31, so that the plasma cooker 200 has the functions of pot detection and ground protection, whether the pot 200 exists on the plasma cooker 100 can be detected in the using process, the good grounding of a product is ensured, and meanwhile, the liftable needle rod 11 can also enable the plasma cooker 100 to enable the pot 200 to move on the cooker and slightly tilt the pot without repeatedly turning off the fire and firing.

The above description is only for clearly illustrating the invention and is not therefore to be considered as limiting the scope of the invention, and all embodiments are not intended to be exhaustive, and all equivalent structural changes made by using the technical solutions of the present invention or other related technical fields directly/indirectly applied under the concept of the present invention are included in the scope of the present invention.

Claims

1. A plasma cooker with pot detection and ground protection comprises a base, a cooking range head arranged on the base, and a power control circuit arranged on the base, and is characterized in that,

2. The plasma cooker with cookware detection and ground protection as claimed in claim 1, wherein the ground probe includes a sleeve, a lid covering the top of the sleeve, a needle rod axially passing through the lid and the sleeve, a return spring sleeved outside the needle rod and having upper and lower ends respectively abutting against the needle rod and the sleeve, a ceramic sleeve sleeved outside the sleeve, and a lead wire connected to the needle rod;

3. The plasma cooker with pot detection and ground protection as claimed in claim 2, wherein a third creepage preventing gap is provided between the electrode mounting plate and the position where the outer wall of the ceramic sleeve penetrates through the electrode mounting plate.

4. The plasma cooker with pot detection and ground protection as claimed in claim 3, wherein the third creepage preventing gap is sealed and filled with sealant.

5. The plasma cooker with pot detection and ground protection as claimed in claim 2, wherein the outer wall of the lower portion of the sleeve is provided with an assembling boss for tight fit with the inner wall of the lower portion of the ceramic bushing.

6. The plasma cooker with pot detection and ground protection as claimed in claim 2, wherein the needle rod comprises a pointed tooth head, a first rod and a second rod with a smaller diameter than the first rod in sequence from top to bottom;

7. The plasma cooker with pot detection and ground protection according to claim 2, wherein the high voltage package comprises an insulating support and a shielding shell located at the lower end of the insulating support and connected with the insulating support, and the high voltage circuit is arranged in the shielding shell;

8. The plasma cooker with pot detection and ground protection as claimed in claim 1, wherein the number of the elastic contacts is at least three, each elastic contact comprises a cylindrical shell installed on the pot support ring, a contact installed in the shell and moving up and down relative to the shell, a lifting spring installed in the shell and having upper and lower ends respectively abutted against the contact and the shell, and a limiting piece located outside the shell and installed at the bottom of the contact, and the pot support ring is connected to the pot detection circuit.

9. The plasma cooker with pot detection and ground protection as claimed in claim 7, wherein a heat dissipation cavity is formed between the bottom end face of the electrode mounting plate and the upper end face of the insulating support at an interval, and a heat dissipation port communicating the outside with the heat dissipation cavity is formed in a side wall of the insulating support.

10. The plasma cooker with pot detection and ground protection according to claim 1, wherein the electrode mounting plate comprises a protective layer, a first electric shock resistant layer, a high temperature resistant thermal insulation layer and a second electric shock resistant layer which are sequentially attached from top to bottom.