CN112834954B

CN112834954B - Plasma kitchen with pan detects and ground connection protection

Info

Publication number: CN112834954B
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: 2023-09-19
Anticipated expiration: 2041-01-29
Also published as: CN112834954A

Abstract

The invention discloses a plasma cooker with a cooker detection function and a grounding protection function, which comprises a base, a cooker head and a power supply control circuit, wherein the cooker head comprises a high-voltage bag, an electrode mounting plate, a plurality of discharge electrodes arranged on the electrode mounting plate, and a cooker support ring arranged on the high-voltage bag, and a high-voltage circuit is arranged in the high-voltage bag and electrically connected with the discharge electrodes and the power supply control circuit; a plurality of elastic contacts protruding upwards are arranged on the pot support ring at intervals in the circumferential direction; the high-voltage bag is also provided with a grounding probe, the grounding probe is provided with a needle bar which can be lifted elastically, and the needle bar penetrates out of the electrode mounting plate upwards; the power supply control circuit is provided with a pot detection circuit, and the elastic contact and the grounding probe are electrically connected with the pot detection circuit. The invention can move the cooker on the plasma kitchen without fire, which 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 with pan detects and ground connection protection

Technical Field

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

Background

Plasma (plasma) is also called plasma, and is an ionized gaseous substance composed of positive and negative ions generated after ionization of atoms and atomic groups of which partial electrons are deprived, macroscopic electrically neutral ionized gas with a dimension larger than debye length, and the movement of the macroscopic electrically neutral ionized gas is mainly governed by electromagnetic force and shows remarkable collective behavior. The plasma is a good conductor, and can be captured, moved and accelerated by means of a magnetic field which is skillfully designed. The development of plasma physics provides new techniques and processes for the further development of materials, energy, information, environmental space, spatial physics, geophysics, etc. science. The plasma is a fourth state of matter other than solids, liquids, and gases. 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 other reasons, the outer electrons break away from the confinement of the nuclei into free electrons, just as students after class run on the playground to play at will. Electrons leave the nuclei, a process called "ionization". At this point, the material becomes a uniform mass of "paste" of positively charged nuclei and negatively charged electrons, and is therefore known as a plasma, in which the total amount of positive and negative charges is equal, and is thus approximately electrically neutral, and is therefore known as a plasma.

The plasma kitchen range is a novel kitchen range which utilizes the characteristic of plasma, uses high-voltage electric 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 flame-like characteristics to heat a cooker for cooking.

Since the plasma cooker uses electric energy as direct energy input, in order to generate plasma beams, the commercial power needs to be boosted to about 10KV high voltage, and under such high working voltage, how to ensure the safety of the electricity consumption of a user and prevent electric shock accidents is very important.

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

1 the pan on the plasma kitchen in 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 support circle on the kitchen range, will cut off the power supply and put out the fire immediately afterwards, leads to the user to carry out the culinary art operation well like this, can't remove the pan. The terrible condition is that the control circuit is turned off after the cooker is grounded and disconnected in the cooker detection design of the plasma cooker in the prior art, so that a user can be shocked, and potential safety hazards exist.

2. The grounding of the existing plasma kitchen range is realized by grounding after contacting with the pot supporting ring arranged on the kitchen range, but because the contact surface of the pot and the pot supporting ring is an inclined surface, poor contact is easy to generate, and the grounding cannot be effectively realized, thereby influencing the use safety.

Accordingly, there is a need in the art for improvement.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a plasma cooker with pan detection and grounding protection, which aims to ensure that the plasma cooker can move the pan on the cooker at will without flameout, ensure the use safety by ensuring good grounding of a product through a lifting grounding probe arranged in the center of the cooker, keep the contact between the pan and the grounding probe after fire closing to keep good grounding through reasonable stroke design of the lifting grounding probe, and completely avoid the condition that a control circuit is closed after grounding is disconnected so as to ensure the use safety; moreover, even if the fire is delayed, the lifting grounding probe always keeps the grounding of the cooker in the travel range, so that the danger of electric shock to a user is avoided; furthermore, through reasonable stroke design of the liftable ground probe, a user can slightly turn the pot to operate (the pot is lifted by the pot turning means, and the pot is repeatedly jolted, so that the cooked food is heated to be in a sufficient cooking action) without flameout, and better cooking experience is achieved.

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

a plasma kitchen range with pan detection and grounding protection comprises a base, a kitchen range arranged on the base, and a power supply control circuit arranged on the base,

the cooking range comprises a high-voltage bag, an electrode mounting plate, a plurality of discharge electrodes, a pot supporting ring and a power supply control circuit, wherein the electrode mounting plate is arranged above the high-voltage bag in a covering mode;

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

the high-voltage bag is also provided with a grounding probe, the grounding probe is provided with a needle bar which can be lifted elastically, and the needle bar penetrates out of the electrode mounting plate upwards;

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

The grounding probe comprises a sleeve, a cover body, a needle bar, a reset spring, a ceramic sleeve and an outgoing line, wherein the cover body is covered on the top end of the sleeve, the needle bar axially penetrates through the cover body and the sleeve, the reset spring is sleeved outside the needle bar, the upper end and the lower end of the reset spring are respectively in butt joint with the needle bar and the sleeve, the ceramic sleeve is sleeved outside the sleeve, and the outgoing line is connected with the needle bar;

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

the ceramic sleeve is characterized in that a first creepage preventing gap is arranged between the ceramic sleeve and the cover body, and a second creepage preventing gap is arranged between the ceramic sleeve and the outer wall of the upper part of the sleeve.

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

And the third creepage prevention gap is filled with sealant in a sealing way.

Wherein, the outer wall ring of sleeve lower part is equipped with the assembly boss and is used for with the inner wall tight fit of ceramic sleeve lower part.

The needle rod sequentially comprises a sharp-tooth-shaped head part, 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 inwards extends and is provided with the taper pipe and is used for wearing out the second body of rod, the lower part joint of first body of rod has E shape jump ring, reset spring is conical spring, its upper end and E shape jump ring butt, its lower extreme and the bottom butt of taper pipe.

The high-voltage package 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 installation blind hole in a downward sunken mode, and the lower portion of the sleeve is provided with an installation table fixed at the bottom of the probe installation blind hole;

the insulation support is provided with a wiring groove in the outward extension of the side wall of the probe installation blind hole, the bottom of the wiring groove is provided with a clamping groove for clamping and laying the outgoing line, and the wiring groove is filled with insulation glue for sealing.

Wherein, at least three elastic contacts are arranged at equal intervals, each elastic contact comprises a cylindrical shell arranged on a pot support ring, a contact arranged in the shell and moving up and down relative to the shell, lifting springs which are arranged in the shell, the upper end and the lower end of the lifting springs are respectively abutted with the contact and the shell, limiting pieces which are arranged outside the shell and at the bottom of the contact are arranged, and the pot support ring is electrically connected with the pot detection circuit.

The electrode mounting plate comprises an electrode mounting plate, an insulating support and a heat dissipation plate, 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 intervals, and a heat dissipation opening for communicating the outside with the heat dissipation cavity is formed in the side wall of the insulating support.

Wherein, the electrode mounting panel includes from last protective layer to laminating setting down in proper order, and first resistant electric shock layer, high temperature resistant insulating layer, the resistant electric shock layer of second.

According to the plasma kitchen range with the pan detection and grounding protection functions, the plurality of elastic contacts are arranged on the pan supporting ring of the kitchen range, the grounding probe is arranged on the high-voltage bag of the kitchen range, the grounding probe is provided with the liftable needle rod which is in contact with the bottom surface of the pan, and the elastic contacts and the grounding probe are electrically connected with the pan detection circuit, so that the plasma kitchen range has the pan detection and grounding protection functions, the grounding probe can ensure good grounding of a product in the use process, and meanwhile, the liftable needle rod can enable the pan to be moved on the plasma kitchen range at will without flameout.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first embodiment of a plasma oven with pan detection and ground protection according to the present invention;

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

FIG. 3 is a schematic view of a ground probe of the plasma oven of the present invention contacting the bottom surface of a pot;

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

FIG. 5 is a schematic 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 pan support ring and the pop-up ground 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 of FIG. 8 at A;

FIG. 10 is a schematic view of the structure of a ground probe;

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

FIG. 12 is a schematic view of the structure of the upper end surface of the insulating support;

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

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

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

Reference numerals illustrate:

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

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be either a fixed connection or a removable connection or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 8, the present invention proposes a plasma oven 100 with pan detection and grounding protection, comprising a base 1, a cooking stove 2 disposed on the base 1, and a power control circuit 3 disposed on the base 1, wherein the cooking stove 2 comprises a high voltage package 4, an electrode mounting plate 5 covering the upper side of the high voltage package, a plurality of discharge electrodes 6 mounted on the electrode mounting plate 5, a pan support ring 7 mounted on the high voltage package 4 and enclosing the plurality of discharge electrodes 6, and the high voltage package 4 is internally provided with a high voltage circuit 8 electrically connected with the discharge electrodes 6 and the power control circuit 3. The base 1 is used for installing a cooking range 2 and a power supply control circuit 3 and plays a supporting role. The base 1 can be formed by combining an upper shell and a lower shell which are made of plastic materials. The pot supporting ring 7 is used for placing and supporting the pot 200.

The power control circuit 3 is used for generating a driving power source required by the high-voltage package 4, and controlling the high-voltage circuit 8 in the high-voltage package 4 to be turned 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 high-voltage power input by the power supply control circuit 3 into high-voltage power and outputs the high-voltage power to the discharge electrode 6 for discharging, and the electric arc generated by the discharge of the discharge electrode 6 ionizes 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 the plug 21.

The control implementation of the power supply control circuit 3 can be realized by adopting a singlechip and a combined program.

The discharge electrode 6 of the plasma oven 100 of the present invention directly discharges the cooker, so the cooker 200 of the present invention needs to use a metal cooker.

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

Preferably, the base 1 of the plasma oven 100 of the present invention may further be provided with a cooling fan 23, and an air inlet and an air outlet for the cooling fan 23 to inlet and outlet air. Therefore, heat generated by the high-pressure bag 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 elastic contacts 9 protruding upwards are arranged on a pot support ring 7 of the plasma oven 100 at intervals in the circumferential direction. According to the invention, the pot supporting ring 7 is electrically connected with the pot detection circuit, and the elastic contact 9 can be directly and electrically connected with the pot detection circuit or electrically connected with the pot detection circuit through the pot supporting ring 7. It will be appreciated that the pot support ring 7 may also be electrically connected to the pot detection circuit via the elastic contacts 9. The elastic contact 9 is arranged on the pot supporting ring 7 in a protruding way, so the elastic contact 9 is higher than the pot supporting ring 7, and can be lifted up and down because of being arranged elastically, even if the contact surface of the pot 200 and the pot supporting ring 7 is an inclined surface, the elastic contact 9 higher than the pot supporting ring 7 can be well contacted with the inclined surface of the pot bottom, so that the pot 200 on the plasma cooker 100 can be well contacted all the time, and the use safety is ensured.

As shown in fig. 3 and 8, the high voltage pack of the plasma oven 100 of the present invention is further provided with a ground probe 10, the ground probe 10 is provided with a needle bar 11 which can be elastically lifted, and the needle bar 11 passes upward out of the electrode mounting plate 5. As shown in fig. 3, the needle bar 11 passes upward out of the electrode mounting plate 5 and contacts 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 ground probe 10 are electrically connected to the pot detection circuit 31. The ground probe 10 of the present invention is electrically grounded.

Because the lifting needle bar 11 is arranged on the grounding probe 10, the top end of the needle bar 11 is contacted with the bottom surface of the pot 200, so that in the extending range of the needle bar 11, even if the pot 200 is lifted away from the pot supporting ring 7, because the pot bottom is still contacted with the needle bar 11, the needle bar 11 is grounded, the pot 200 is grounded without potential safety hazard, and again, even if the lifting height of the pot 200 is higher than the highest extending height of the needle bar 11, the discharge electrode 5 is not discharged towards the pot bottom because the pot bottom of the pot 200 is far enough, and the pot 200 is safe, so that a user can perform 'pot-turning' without potential safety hazard during cooking. The highest protruding height of the needle bar 11 can be designed by experiments, for example, the highest protruding height of the needle bar 11 is 50mm or more from the plane of the discharge electrode 6. Through reasonable stroke design of the liftable grounding probe, the condition that the control circuit is closed after the grounding is disconnected is completely avoided, so that the use safety is ensured; furthermore, through reasonable stroke design of the liftable ground probe, a user can slightly turn the pot to operate (the pot is lifted by the pot turning means, and the pot is repeatedly jolted, so that the cooked food is heated to be in a sufficient cooking action) without flameout, and better cooking experience is achieved.

The pot detection circuit 31 detects whether the pot 200 is placed on the plasma kitchen range 100 or not, and judges whether the liftable needle bar 11 of the grounding probe 10 is connected with the pot support ring 7 and the elastic contact 9 or not, and the power supply control circuit 3 controls the power supply of the plasma kitchen range 100 to be turned off once the connection and disconnection of the pot 200, the liftable needle bar 11 and the pot support ring 7 occur.

Preferably, at least 3 elastic contacts 9 of the pan supporting ring 7 are arranged at equal intervals, so that the pan 200 can be stably supported, and meanwhile, the pan 200 can be well contacted with the pan supporting ring 7, and even if the pan 200 is slightly moved in the pan supporting ring 7, the pan 200 can be electrically connected with the pan detection circuit.

When the cooker 200 is placed on the plasma cooker 100, the bottom surface of the cooker 200 is elastically contacted with the lifting needle bar 11 of the grounding probe 10, and meanwhile, the bottom surface of the cooker 200 is also contacted with the cooker support ring 7 (at least 3 elastic contacts are arranged on the bottom surface), which is equivalent to that the cooker 200 is electrically connected with the lifting needle bar 11 and the cooker support ring 7, and is detected to be stolen by the cooker detection circuit 31, and then fed back to the power supply control circuit 3, a signal that the cooker 200 is placed on the plasma cooker 100 is fed back to the control circuit, and the control circuit receives an ignition command, otherwise, the control circuit does not receive the ignition command. In this way, whether the cooker 200 is on the plasma kitchen range 100 is judged, and the cooker 200 is turned off immediately once completely leaving the plasma kitchen range 100, so that safe use is realized.

In addition, as the needle bar 11 which can be lifted is arranged on the grounding probe 10, and then the elastic contact 9 can be lifted elastically, the top end of the needle bar 11 and the top end of the elastic contact 9 are contacted with the bottom surface of the cooker 200, so that the cooker 200 can be moved randomly on the plasma cooker 100 and slightly overturned in the range of elastic extension of the needle bar 11 and the elastic contact 9, and the plasma cooker 100 keeps working continuously without turning off fire, thereby facilitating the cooking operation of a user. In the embodiment of the present invention, the highest protruding height of the needle bar 11 may be designed through experiments, for example, the highest protruding height of the needle bar 11 is 50mm or more from the plane of the discharge electrode 6.

Preferably, the power supply control circuit 3 of the present invention further includes a leakage detection circuit. The leakage detection circuit detects whether or not there is leakage in the housing such as the base 1 and the cooking range 2, the cooker 200, and the like, and the power control circuit 3 controls the power of the plasma oven 100 to be turned off when the leakage occurs. Thereby ensuring the use safety.

Specifically, as shown in fig. 9 to 11, the grounding probe 10 of the present invention includes a sleeve 12, a cover 13 provided on the tip of the sleeve 12, the needle shaft 11 axially penetrating the cover 13 and the sleeve 12, a return spring 14 provided outside the needle shaft 11 and having upper and lower ends respectively contacting the needle shaft 11 and the sleeve 12, a ceramic sleeve 15 provided outside the sleeve 12, and a lead wire 16 connected to the needle shaft 11. The lower end of the sleeve 12 is fixed on the high-voltage bag 4, and the upper ends of the sleeve 12, the ceramic sleeve 15 and the needle rod 11 all penetrate out of the electrode mounting plate 5. The upper end opening of the sleeve 12 is connected with the cover 13 through threads, and the outgoing line 16 is connected with the pot detection circuit 31.

After the top end of the needle bar 11 is contacted with the bottom of the pot, the pot 200 is pressed down, so that the needle bar 11 moves downwards in the sleeve 12, the downward movement of the needle bar 11 causes the return spring 14 to compress, and the return spring 14 enables the needle bar 11 to always keep contact with the bottom of the pot. Meanwhile, since the needle bar 11 is electrically connected with the outgoing line 16, the pot 200 is grounded after the bottom of the pot contacts 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 creepage preventing gap 17 is arranged between the ceramic sleeve 15 and the cover 13, and a second creepage preventing gap 18 is arranged between the ceramic sleeve 15 and the outer wall of the upper part of the sleeve 12. Due to the arrangement of the first creepage preventing gap 17 and the second creepage preventing gap 18, when the discharge electrode 6 on the electrode mounting plate 5 is to discharge the sleeve 12, the surface of the top end of the ceramic sleeve 15 and the surface of the inner wall of the ceramic sleeve 15 need to be downward until the connection position of the lower part of the ceramic sleeve 15 and the sleeve 12, thus, the creepage distance between the discharge electrode 6 and the sleeve 12 is increased to prevent creepage.

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

Preferably, the third creepage prevention gap 19 of the present invention is sealed filled with a sealant. The electrode mounting plate 5 is sealed with the high-pressure bag 4 below by the sealant, so that sundries in the kitchen range 2 part are prevented from entering the high-pressure bag 4, and heat can be prevented from being conducted downwards along a gap.

As shown in fig. 11, the outer wall of the lower portion of the sleeve 12 of the present invention is provided with an assembling boss 121 for tight-fitting with the inner wall of the lower portion of the ceramic sleeve 15. The mounting boss 121 facilitates the positioning and mounting of the ceramic sleeve 15.

Specifically, the needle bar 11 of the present invention includes a pointed head 111, a first bar 112 and a second bar 113 having a smaller diameter than the first bar 112 in this order from top to bottom. The bottom of the sleeve 12 extends inwards to form 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 with the E-shaped clamp spring 114, and the lower end of the return spring is abutted with the bottom of the taper pipe 122.

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

With continued reference to fig. 6, the high-voltage package 4 of the present invention includes an insulation support 41 and a shielding shell 42 connected to the insulation support 41 at the lower end of the insulation support 41, and 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 protection.

As shown in fig. 8 to 10, the upper end surface of the insulating support 41 is provided with a probe mounting blind hole 411 in a downward recessed manner, and the lower portion of the sleeve 12 is provided with a mounting table 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 post, the mounting table 123 is provided with a connection hole, and the connection post and the connection hole are connected by a screw. The bottom surface of the probe mounting blind hole 411 is not through-hole, i.e., is not communicated 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 wire groove 412 extending outwards from the side wall of the probe mounting blind hole 411, the bottom of the wire groove 412 is provided with a wire clamping groove 4121 for clamping and laying the outgoing wire 16, and the wire groove 412 is filled with insulating glue for sealing.

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

As shown in fig. 14 and 15, each elastic contact 9 of the present invention includes a cylindrical housing 91 mounted on a pot support ring 7, a contact 92 mounted in the housing 91 and moving up and down with respect to the housing, a lift 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 piece 94 located outside the housing 91 and mounted at the bottom of the contact. The pot supporting ring 7 is electrically connected with the pot detecting circuit 31. After the elastic contact 9 is arranged on the pot supporting ring 7, the elastic contact 9 and the pot supporting ring 7 are electrically grounded. The limiting tab 94 is used to prevent the contact 92 from coming out of the housing 91 during upward return.

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 intervals, and a heat dissipation opening 413 for communicating the outside with the heat dissipation cavity 20 is formed on the side wall of the insulating support 41. Therefore, the heat dissipation inside the cooking range 2 can be quickened, and the heat dissipation effect is improved.

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 shock-resistant layer 52, a high-temperature-resistant heat-insulating layer 53, and a second shock-resistant layer 54, which are sequentially laminated from top to bottom.

The protective layer 51 serves to prevent foreign materials such as water, oil, dishes, etc. from falling into the cooking range 2 during cooking, and is difficult to clean and thus affects use. Meanwhile, the protective layer 51 is positioned at the uppermost layer, which is directly exposed under the discharge electrode 6, so that the protective layer 51 can prevent a portion 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 stove 2 from being conducted to the high-voltage circuit 8 in the high-voltage bag 4 to influence the performance of the high-voltage circuit 8.

Since the plurality of discharge electrodes 6 are penetrated on the high temperature resistant insulating layer 53, if the discharge arc between the discharge electrodes 6 directly acts on the high temperature resistant insulating layer 53, the high temperature resistant insulating layer 53 is easily damaged by electric shock to affect the service life. The invention respectively adheres and arranges a first electric shock resistant layer 52 and a second electric shock resistant layer 54 on the upper and lower surfaces of a high temperature resistant heat insulation layer 53. Thus, the high temperature resistant insulating layer 53 is prevented from being electrically damaged, so that the electrode mounting plate 5 of the present invention achieves both good heat insulation and prevention of electric shock damage.

According to the plasma kitchen range 100 with the pan detection and grounding protection provided by the embodiment of the invention, the plurality of elastic contacts 9 are arranged on the pan supporting ring 7 of the kitchen range 2, meanwhile, the grounding probe 10 is arranged on the high-voltage bag 4 of the kitchen range 2, the grounding probe 10 is provided with the liftable needle rod 11 which is in contact with the bottom surface of the pan 200, and the elastic contacts 9 and the probe 10 are electrically connected with the pan detection circuit 31, so that the plasma kitchen range 200 has the pan detection and grounding protection functions, whether the pan 200 is arranged on the plasma kitchen range 100 can be detected in the use process, good grounding of products is guaranteed, and meanwhile, the liftable needle rod 11 can enable the pan 200 to move on the kitchen range and slightly turn over the pan without repeated ignition.

The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims, rather, as the description of the invention covers all embodiments of the invention.

Claims

1. The plasma kitchen range with pan detection and grounding protection comprises a base, a kitchen range arranged on the base, and a power supply control circuit arranged on the base, and is characterized in that,

the power supply control circuit is provided with a cooker detection circuit, the elastic contact and the grounding probe are electrically connected with the cooker detection circuit, and when a cooker is placed on the cooker support ring, the cooker is communicated with the elastic contact, the grounding probe and the cooker detection circuit;

2. The plasma cooker with pan detection and grounding protection according to claim 1, wherein a third creepage prevention gap is arranged between the position where the electrode mounting plate penetrates through the outer wall of the ceramic sleeve and the electrode mounting plate.

3. The plasma cooker with pan detection and grounding protection according to claim 2, wherein the third creepage prevention gap seal is filled with sealant.

4. The plasma cooker with pan detection and grounding protection according to claim 1, wherein an assembling boss is provided on the outer wall of the lower portion of the sleeve in a surrounding manner for tightly fitting with the inner wall of the lower portion of the ceramic sleeve.

5. The plasma cooker with pan detection and grounding protection according to claim 1, wherein the needle bar sequentially comprises a pointed head part from top to bottom, a first bar body and a second bar body with a diameter smaller than that of the first bar body;

6. The plasma cooker with pan detection and grounding protection according to claim 1, wherein the high-voltage package 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;

7. The plasma cooker with cooker detection and grounding protection according to claim 1, wherein at least three elastic contacts are arranged at equal intervals, each elastic contact comprises a cylindrical shell installed in a cooker support ring, a contact installed in the shell and moving up and down relative to the shell, a lifting spring installed in the shell, the upper end and the lower end of which are respectively abutted with the contact and the shell, and a limiting piece positioned outside the shell and installed at the bottom of the contact, wherein the cooker support ring is connected with a cooker detection circuit.

8. The plasma cooker with pan detection and grounding protection according to claim 6, wherein a heat dissipation cavity is formed between the bottom end surface of the electrode mounting plate and the upper end surface of the insulating support at intervals, and a heat dissipation opening for communicating the outside with the heat dissipation cavity is formed in the side wall of the insulating support.

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