A heat-insulating plasma stove

Abstract

The invention discloses a heat-insulating plasma stove, comprising a base, a stove head, and an electric control unit, wherein the stove head comprises a plurality of discharge electrodes exposed from the base and a transformer module arranged below the discharge electrodes, wherein the transformer module comprises a mounting shell and a transformer circuit unit; the stove head also comprises a high-temperature resistant insulating plate covering the upper end of the mounting shell and forming a first heat-insulating cavity at intervals, wherein the upper end of the mounting shell is provided with a plurality of wire posts, and the two ends of each wire post are respectively located in the first heat-insulating cavity and the mounting shell; a first conductive member is electrically connected to the upper end of each wire post in the first heat-insulating cavity, and the first conductive member is electrically connected to a discharge electrode upward, and the lower end of each wire post in the mounting shell is electrically connected to the transformer circuit unit. The invention enables a good heat-insulating effect between the discharge electrode at the stove head of the plasma stove and the transformer circuit unit, and heat is difficult to be conducted downward to the transformer circuit unit, thereby ensuring the stability of the transformer circuit unit.

Description

Technical Field

[0001] The invention relates to the technical field of stoves, and in particular to a heat-insulating plasma stove. Background Art

[0002] Plasma, also known as plasma, is an ionized gaseous substance composed of positive and negative ions produced by ionization of atoms and atomic groups after some electrons are deprived. It is a macroscopic electrically neutral ionized gas with a scale larger than the Debye length. Its movement is mainly dominated by electromagnetic force and exhibits significant collective behavior. Plasma is a very good conductor. Plasma can be captured, moved and accelerated by cleverly designed magnetic fields. The development of plasma physics has provided new technologies and processes for the further development of sciences such as materials, energy, information, environmental space, space physics, and geophysics. Plasma is the fourth state of matter, different from solid, liquid and gas. Matter is composed of molecules, molecules are composed of atoms, and atoms are composed of positively charged nuclei and negatively charged electrons surrounding them. When heated to a high enough temperature or for other reasons, the outer electrons break free from the constraints of the nucleus and become free electrons, just like students running to the playground to play freely after class. The process of electrons leaving the nucleus is called "ionization". At this time, the matter becomes a uniform "paste" composed of positively charged atomic nuclei and negatively charged electrons, so people jokingly call it ion plasma. The total amount of positive and negative charges in these ion plasmas is equal, so it is approximately electrically neutral, so it is called plasma.

[0003] A plasma stove is a new type of stove that utilizes the characteristics of plasma, uses high voltage electricity to break through the air to form thermal plasma, converts electrical energy into thermal energy, and ultimately obtains a thermal plasma beam of ideal length and function, generating a thermal plasma beam similar to flame characteristics to heat the pot for cooking.

[0004] The stove heads of plasma stoves currently on the market have defects in heat insulation:

[0005] The discharge electrode on the stove generates a large amount of plasma due to the discharge arc ionizing the air, and the plasma releases heat energy for cooking. However, a circuit such as a transformer circuit unit is generally arranged in the base below the discharge electrode. The existing plasma stove does not have a good heat insulation measure between the discharge electrode below the stove and the transformer circuit unit, which makes it very easy for the heat generated by the stove to be transferred downward to the transformer circuit unit, thereby affecting the stability of the transformer circuit unit.

[0006] Therefore, the prior art needs to be improved. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an insulated plasma stove, aiming to ensure that there is a good thermal insulation effect between the discharge electrode and the transformer circuit unit at the stove head of the plasma stove, so that heat is difficult to be transferred downward to the transformer circuit unit, thereby ensuring the stability of the operation of the transformer circuit unit.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A heat-insulated plasma stove, comprising a base, a stove head arranged on the base, and an electric control unit arranged on the base, wherein the stove head comprises a plurality of discharge electrodes exposed above the base, and the stove head further comprises a voltage transformation module arranged below the discharge electrodes, wherein the voltage transformation module comprises a mounting shell mounted on the base and a voltage transformation circuit unit arranged in the mounting shell, wherein the voltage transformation circuit unit is electrically connected to the electric control unit and the discharge electrodes;

[0010] The stove head further comprises a high temperature resistant insulating plate which covers the upper end of the mounting shell and is spaced apart from the upper end of the mounting shell to form a first heat insulation cavity, and the plurality of discharge electrodes are mounted on the high temperature resistant insulating plate;

[0011] A plurality of wire posts are provided on the upper end of the installation shell, and two ends of each wire post are respectively located in the first heat insulation cavity and the installation shell;

[0012] A first conductive member is electrically connected to the upper end of each conductor post in the first heat-insulating cavity, the first conductive member is electrically connected to a discharge electrode upward, and the lower end of each conductor post in the mounting shell is electrically connected to the transformer circuit unit.

[0013] Wherein, the first conductive member is a first wire spring.

[0014] Wherein, a second conductive member is spaced apart and electrically connected between the lower end of each conductive post in the installation shell and the upper end of the transformer circuit unit.

[0015] Wherein, the second conductive member is a second wire spring.

[0016] Wherein, the installation housing comprises an upper cover and a lower cover, and the transformer circuit unit is arranged in a cavity between the upper cover and the lower cover;

[0017] The upper cover comprises a first cover plate portion and a second cover plate portion which are stepped downward from the inside to the outside, and a connecting ring which is vertically arranged at the periphery of the second cover plate portion, the first cover plate portion is penetrated by the plurality of wire posts, the upper end surface of the connecting ring is higher than the upper end surface of the first cover plate portion, and the upper end surface of the connecting ring overlaps with the lower end surface of the high temperature resistant insulating plate, and the lower end surface of the connecting ring overlaps with the upper end surface of the lower cover;

[0018] The gap between the lower end surface of the high temperature resistant insulation board and the upper end surface of the first cover plate portion forms the first heat insulation cavity;

[0019] A gap between the lower end surface of the first cover plate portion and the upper end surface of the transformer circuit unit forms a second heat-insulating cavity, and the plurality of second wire springs are accommodated in the second heat-insulating cavity.

[0020] Wherein, the upper end surface of the connecting ring and the lower end surface of the high temperature resistant insulating plate are covered with a first supporting step protruding in an annular direction, and a sealant seal is provided;

[0021] The upper end surface at the middle position of the first cover plate portion is also protrudingly provided with a second supporting step that abuts against the lower end surface at the middle position of the high temperature resistant insulation board.

[0022] Wherein, a high temperature resistant insulating plate is passed through the bottom of the discharge electrode and a locking washer and a locking screw are exposed in the first heat insulation cavity, the upper end of the first wire spring is sleeved outside the locking screw and pressed against the locking washer, and the lower end of the first wire spring is sleeved outside the upper end of the wire column and pressed against the upper end surface of the upper cover;

[0023] The upper end of the second wire spring is sleeved outside the lower end of the wire column and pressed against the lower end surface of the upper cover, and the lower end of the second wire spring is pressed against the upper end of the transformer circuit unit.

[0024] Wherein, the upper cover is made of plastic, and the lead post is integrally formed with the upper cover by injection molding.

[0025] Wherein, a negative electrode for forming a discharge loop with a plurality of discharge electrodes is also arranged above the high temperature resistant insulation plate.

[0026] Wherein, the electric control unit comprises a main control circuit, a power supply circuit electrically connected to the main control circuit, and an output end of the power supply circuit is electrically connected to an input end of the voltage conversion circuit unit;

[0027] The electric control unit also includes a leakage detection circuit electrically connected to the main control circuit;

[0028] A temperature sensor is also arranged on the outer wall of the installation shell and is electrically connected to the main control circuit.

[0029] The heat-insulating plasma stove of the present invention is provided with a high-temperature-resistant insulating plate between the discharge electrode of the stove head and the installation shell of the transformer module, and the high-temperature-resistant insulating plate covers the upper end of the installation shell, and forms a first heat-insulating cavity with the upper end of the installation shell, so that the installation shell is sealed in the cavity below the high-temperature-resistant insulating plate, and there are three layers of heat-insulating protection between the discharge electrode and the transformer circuit unit, the first layer is the high-temperature-resistant insulating plate directly blocking most of the heat conducted downward, the second layer is the first heat-insulating cavity so that the high-temperature-resistant insulating plate and the installation shell are non-contact, avoiding the heat on the high-temperature-resistant insulating plate from being conducted to the installation shell through contact, and the third layer is the installation shell, which blocks the heat in the first heat-insulating cavity from being conducted to the transformer circuit unit. In this way, the stove head of the plasma stove of the present invention makes it difficult for the heat generated at the discharge electrode position to be conducted downward to the transformer circuit unit through the three-layer heat-insulating protection structure, and there can be a good heat-insulating effect between the discharge electrode and the transformer circuit unit, thereby ensuring the stability of the operation of the transformer circuit unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of a first embodiment of the heat-insulating plasma stove of the present invention;

[0032] Figure 2 for Figure 1 Schematic diagram of the structure.

[0033] Figure 3 for Figure 1 Schematic cross-section of the structure;

[0034] Figure 4 A schematic diagram of the circuit principle of the first embodiment of the heat-insulating plasma stove of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the housing, high temperature resistant insulation board and discharge electrode installed in the present invention;

[0036] Figure 6 for Figure 5 Schematic diagram of the structure.

[0037] Figure 7 for Figure 5 Schematic cross-section of the structure;

[0038] Figure 8 for Figure 7Schematic diagram of the structure.

[0039] Fig. 9 A cross-sectional schematic diagram of installing the upper cover of the housing;

[0040] Fig.10 for Figure 7 A magnified schematic diagram of center A.

[0041] Description of reference numerals:

[0042] 100-plasma stove, 1-base, 2-cooker head, 3-electronic control unit, 31-main control circuit, 32-power supply circuit, 33-leakage detection circuit, 4-discharge electrode, 41-locking gasket, 42-locking screw, 5-transformer module, 6-installation shell, 61-upper cover, 611-first cover plate part, 6111-second support step, 612-second cover plate part, 613-connecting ring, 6131-first support step, 62-lower cover, 621-incoming wiring port, 622-ground wiring port, 7-transformer circuit unit, 8-high temperature resistant insulation board, 9-conductor column, 10-first conductive member, 11-second conductive member, 12-negative electrode, 13-temperature sensor, 15-cooker support, 16-plug, 17-human-machine interaction panel, 18-switch button, 19-adjusting knob, 201-first insulation cavity, 202-second insulation cavity. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0047] Please refer to Figures 1 to 4 The present invention proposes an insulated plasma stove 100, comprising a base 1, a stove head 2 arranged on the base 1, and an electric control unit 3 arranged on the base, wherein the stove head 2 comprises a plurality of discharge electrodes 4 exposed above the base, and the stove head 2 further comprises a transformer module 5 arranged below the discharge electrodes 4, wherein the transformer module 5 comprises a mounting shell 6 mounted on the base 1 and a transformer circuit unit 7 arranged in the mounting shell 6, wherein the transformer circuit unit 7 is electrically connected to the electric control unit 3 and the discharge electrodes 4. The housings of the base 1 and the stove head 2 of the present invention are grounded for protection. The stove head 2 further comprises a pot support 15 arranged above the base 1 for supporting pots. The pots can be made of materials such as metal pots or ceramic pots.

[0048] The electric control unit 3 is used to generate the driving power required by the transformer circuit unit 7, and control the on and off of the transformer circuit unit 7 and the output power. The driving power generated by the electric control unit 3 is a high-frequency or low-frequency low-voltage power supply. The transformer circuit unit 7 converts the low-voltage electricity input by the electric control unit 3 into high-voltage electricity and outputs it to the discharge electrode 4 for discharge. The arc generated by the discharge of the discharge electrode 4 ionizes the air to generate high-temperature plasma to heat the bottom of the pot. In the embodiment of the present invention, the electric control unit 3 and the transformer module 5 are isolated and arranged in the base 1. The electric control unit 3 is connected to an external power supply through a plug 16.

[0049] The discharge electrode 4 of the plasma stove 100 of the present invention is a positive electrode. When the cookware is a metal cookware, the metal cookware can be directly used as a negative electrode to form a discharge circuit; when the cookware is a ceramic cookware, a negative electrode needs to be separately provided in the stove head 2.

[0050] like Figure 4 As shown, the electric control unit 3 of the embodiment of the present invention includes a main control circuit 31 , a power supply circuit 32 electrically connected to the main control circuit 31 , and an output end of the power supply circuit 32 is electrically connected to an input end of the voltage conversion circuit unit 7 .

[0051] The main control circuit 31 can be controlled by a single chip microcomputer combined with a program. The main control circuit 31 controls the output of the voltage conversion circuit unit 7. The power supply circuit 32 provides driving current for the voltage conversion circuit unit 7. The power supply circuit 32 is connected to an external mains power supply through a plug 16.

[0052] Preferably, the electric control unit 3 of the present invention further includes a leakage detection circuit 33 electrically connected to the main control circuit 31. The leakage detection circuit 33 detects whether there is leakage in the base 1, the pot support 15 of the stove head 2, the mounting housing 6 of the transformer module 5, the pot, etc. Once leakage occurs, the main control circuit 31 controls to turn off the power supply of the plasma cooker 100, thereby ensuring safety in use.

[0053] Preferably, if Figure 5 As shown, a temperature sensor 13 is also provided on the outer wall of the installation shell 6 of the plasma stove 100 of the present invention and is electrically connected to the main control circuit 31. The temperature sensor 13 can detect the temperature of the installation shell 6 when the heat generated by the transformer circuit unit 7 or the plasma beam is conducted to the installation shell 6. When the actual temperature of the installation shell 6 exceeds the preset temperature during operation, the power supply of the transformer circuit unit 7 will be cut off, so that the transformer circuit unit 7 stops outputting electrical energy to the discharge electrode and stops the discharge operation to ensure safety in use. An incoming line connection port 621 and a grounding line connection port 622 are also provided on the outer wall of the installation shell 6. The incoming line connection port 621 electrically connects the transformer circuit unit 7 in the installation shell 6 with the power supply circuit 32, and the grounding line connection port 622 is used to protect the installation shell from grounding.

[0054] In the embodiment of the present invention, a human-machine interaction panel 17 is also provided on the base 1 for controlling the plasma stove 100. The human-machine interaction panel 17 can be set as a button or a touch screen. A switch button 18 and an adjustment knob 19 are also provided on the base 1 for turning on and off the plasma stove 100 and adjusting the output power. The human-machine interaction panel 17, the switch button 18 and the adjustment knob 19 are all electrically connected to the main control circuit 31.

[0055] like Figures 5 to 10 As shown, the stove head 2 of the plasma 100 of the present invention further includes a high temperature resistant insulating plate 8 covering the upper end of the mounting shell 6 and forming a first heat insulation cavity 201 with the upper end of the mounting shell 6, and the plurality of discharge electrodes 4 are mounted on the high temperature resistant insulating plate 8. Since the mounting shell 6 is covered by the high temperature resistant insulating plate 8, it is equivalent to that the mounting shell 6 is sealed in the cavity below the high temperature resistant insulating plate 8. The discharge electrode 4 is mounted on the high temperature resistant insulating plate 8, and the bottom of the discharge electrode 4 can be fixed on the high temperature resistant insulating plate 8 and extend through the high temperature resistant insulating plate 8 into the first heat insulation cavity 201.

[0056] At the same time, since the transformer circuit unit 7 in the installation shell 6 needs to be electrically connected to the discharge electrode 4, a plurality of wire posts 9 are passed through the upper end of the installation shell 6 of the present invention, and the two ends of each wire post 9 are respectively located in the first insulation cavity 201 and the installation shell 6; a first conductive member 10 is electrically connected to the upper end of each wire post 9 in the first insulation cavity 201, and the first conductive member 10 is electrically connected to a discharge electrode 4 upward, and the lower end of each wire post 9 in the installation shell 6 is electrically connected to the transformer circuit unit 7.

[0057] That is, multiple wire posts 9 are passed through the installation shell 6, the upper end of each wire post 9 extends into the first insulation cavity 201 and is electrically connected to the discharge electrode 4 fixed on the high temperature resistant insulation board 8 through the first conductive member 10, and the lower end of each wire post 9 extends into the interior of the installation shell 6 and is directly electrically connected to the transformer circuit unit 7 or connected through a wire.

[0058] The first heat-insulating cavity 201 makes the high-temperature-resistant insulating plate 8 non-contact with the upper end of the mounting shell 6 , while the mounting shell 6 protects the transformer circuit unit 7 therein.

[0059] The structural design in the stove head 2 of the plasma stove 100 of the present invention provides three layers of heat insulation protection between the heat generated at the position of the discharge electrode 4 in the stove head 2 and the transformer circuit unit 7. The first layer is the high temperature resistant insulating board 8, which directly blocks most of the heat conducted downward. The second layer is the first heat insulation cavity 201, which makes the high temperature resistant insulating board 8 non-contact with the installation shell 6, thereby preventing the heat on the high temperature resistant insulating board 8 from being conducted to the installation shell 6 through direct contact. The third layer is the installation shell 6, which blocks the heat in the first heat insulation cavity 201 from being conducted to the transformer circuit unit 7. Such a three-layer heat insulation protection structure enables the stove head of the plasma stove 100 of the present invention to have a good heat insulation effect, making it difficult for the heat generated at the position of the discharge electrode 4 to be conducted downward to the transformer circuit unit 7, thereby ensuring the stability of the operation of the transformer circuit unit 7.

[0060] Preferably, the high temperature resistant insulating plate 8 of the present invention is made of mica and can withstand high temperatures of about 1000 to 1200 degrees.

[0061] Furthermore, the first conductive member 10 of the present invention is a first wire spring. That is, the present invention uses a conductive spring as a wire connecting the upper end of the wire column 9 and the discharge electrode 4. Because the bottom of the discharge electrode 4 must be connected to the upper end of the wire column 9 by a wire, the wire inevitably conducts part of the heat at the bottom of the discharge electrode 4 to the wire column 9. However, the present invention uses a wire spring as a conductive member, which can greatly lengthen the heat conduction path on the wire, so that most of the heat on the wire is dissipated in the first insulation cavity 201 for heat dissipation and will not be quickly conducted to the wire column 9. It has the effect of blocking and slowing down the heat conduction downward to the transformer circuit unit 7.

[0062] Preferably, a second conductive member 11 is spaced and electrically connected between the lower end of each wire post 9 in the mounting housing 6 of the present invention and the upper end of the transformer circuit unit 7. This makes the inner wall of the mounting housing 6 and the upper end of the transformer circuit unit 7 non-contact, avoiding rapid heat conduction caused by direct contact and improving the heat insulation effect.

[0063] Furthermore, the second conductive member 11 of the present invention is a second conductive wire spring. Similarly, using the second conductive wire spring as a conductive member between the lower end of the conductive wire column 9 and the upper end of the transformer circuit unit 7 can greatly lengthen the heat conduction path on the conductive wire, thereby preventing and slowing down the heat conduction downward to the transformer circuit unit 7.

[0064] Specifically, Figure 7 and Figure 8 As shown, the mounting housing 6 of the present invention comprises an upper cover 61 and a lower cover 62, and the transformer circuit unit 7 is arranged in a cavity between the upper cover 61 and the lower cover 62. The mounting housing 6 not only mounts the transformer circuit unit 7 in the base 1, but also protects the transformer circuit unit 7 from external interference.

[0065] Preferably, the upper cover 61 is made of plastic, and the wire post 9 is integrally molded with the upper cover 61. The plastic material makes the upper cover 61 have a good insulation effect, which facilitates the wire post 9 and the upper cover 61 to be integrally molded by injection molding. After the integral structure is formed by injection molding, the position where the wire post 9 passes through the upper cover 61 can be well sealed to prevent heat from being conducted downward through the perforation.

[0066] like Fig. 9 As shown, the upper cover 61 includes a first cover portion 611 and a second cover portion 612 which are stepped downward from the inside to the outside, and a connecting ring 613 vertically arranged on the periphery of the second cover portion 612. The first cover portion 611 is penetrated by the multiple wire posts 9, the upper end surface of the connecting ring 613 is higher than the upper end surface of the first cover portion 611, and the upper end surface of the connecting ring 613 overlaps with the lower end surface of the high temperature resistant insulating plate 8, and the lower end surface of the connecting ring 613 overlaps with the upper end surface of the lower cover 62.

[0067] The gap between the lower end surface of the high temperature resistant insulating plate 8 and the upper end surface of the first cover portion 611 forms the first thermal insulation cavity 201; the gap between the lower end surface of the first cover portion 611 and the upper end surface of the transformer circuit unit 7 forms the second thermal insulation cavity 202, and the multiple second wire springs are accommodated in the second thermal insulation cavity 202.

[0068] The upper cover 61 is configured to be a first cover plate portion 611, a second cover plate portion 612 and a connecting ring 613, and the upper end surface of the connecting ring 613 is higher than the upper end surface of the first cover plate portion 611, so that the upper end surface of the upper cover 61 forms a downwardly recessed cavity, which is separated from the high temperature resistant insulating board 8 to form a first insulation cavity 201.

[0069] The first cover plate portion 611 and the second cover plate portion 612 of the upper cover 61 are arranged downward in a stepped manner from the inside to the outside, that is, the height of the upper end surface of the first cover plate portion 611 is higher than the height of the upper end surface of the second cover plate portion 612, so that the lower end surface of the upper cover 61 forms an upwardly recessed cavity, which is spaced from the upper end of the transformer circuit unit 7 to form a second insulation cavity 202.

[0070] The formation of the first heat insulation cavity 201 prevents the high temperature resistant insulating plate 8 from directly contacting the second cover plate portion 612. The formation of the second heat insulation cavity 202 prevents the second cover plate portion 612 from directly contacting the upper end of the transformer circuit unit 7, achieving a double-layer heat insulation effect.

[0071] Preferably, a heat dissipation port (not shown) is provided on the inner wall where the connecting ring 613 and the second cover plate portion 612 of the embodiment of the present invention are connected, so as to allow the hot air in the first heat insulation cavity 201 to flow out and accelerate heat dissipation.

[0072] like Fig. 9 As shown, the upper end surface of the connection ring 613 of the present invention overlaps with the lower end surface of the high temperature resistant insulation board 8 and is provided with a first support step 6131 protruding in an annular direction, and is provided with a sealant seal. The first support step 6131 overlaps with the lower end surface of the high temperature resistant insulation board 8 and is sealed by the sealant to prevent heat from penetrating from the overlapped position.

[0073] The upper end surface of the middle position of the first cover plate portion 611 is also protrudingly provided with a second support step 6111 to abut against the lower end surface of the middle position of the high temperature resistant insulation board 8. The second support step 6111 supports the high temperature resistant insulation board 8 at the middle position to enhance the support effect.

[0074] Please continue to refer to Fig.10 The bottom of the discharge electrode 4 of the present invention is penetrated by a high temperature resistant insulating plate 8 and a locking gasket 41 and a locking screw 42 are exposed in the first heat insulation cavity. The upper end of the first wire spring is sleeved outside the locking screw 42 and pressed against the locking gasket 41. The lower end of the first wire spring is sleeved outside the upper end of the wire column 9 and pressed against the upper end surface of the upper cover 61. The upper end of the second wire spring is sleeved outside the lower end of the wire column 9 and pressed against the lower end surface of the upper cover 61. The lower end of the second wire spring is pressed against the upper end of the transformer circuit unit 7.

[0075] The locking washer 41 and the locking screw 42 can fix the discharge electrode 4 on the high temperature resistant insulating plate 8, and facilitate the first wire spring to be sleeved on the locking screw 42 and pressed against the locking washer 41. The lower end of the first wire spring is in contact with the upper end surface of the first cover plate portion 611 of the upper cover, and the upper end of the second wire spring is in contact with the lower end surface of the first cover plate portion 611 of the upper cover 61.

[0076] Please continue to refer to Figure 3 Preferably, the plasma stove 100 of the present invention is further provided with a negative electrode 12 above the high temperature resistant insulating plate 8 for forming a discharge circuit with the plurality of discharge electrodes 4. The negative electrode 12 is connected to the power ground on the circuit of the electric control unit 3.

[0077] The plasma stove 100 of the present invention is provided with a separate negative electrode 12, so that during use, the cookware is no longer a part of the electrical circuit, which changes the method of some existing plasma stoves 100 in which the plasma beam is generated between the "discharge electrode" and the "pot", and allows the plasma beam to be generated between the "discharge electrode" and the "negative electrode", thereby achieving the use of both metal and non-metal cookware on the plasma stove 100 of the present invention, while avoiding the problem that when the pot is used as the negative electrode, the plasma directly hits the bottom of the pot, causing the pot to break down under the action of a long time, thereby shortening the life of the pot.

[0078] It is understood that the base 1 of the plasma stove 100 of the present invention may also be provided with a cooling fan and an air inlet and an air outlet for the cooling fan to take in and out air, so that the heat generated by the transformer module 5 can be quickly blown out of the base 1 to ensure the heat dissipation effect of the whole machine.

[0079] The heat-insulated plasma stove 100 proposed in the embodiment of the present invention is provided with a high-temperature-resistant insulating plate 8 between the discharge electrode 4 of the stove head 2 and the mounting shell 6 of the transformer module 5, and the high-temperature-resistant insulating plate 8 covers the upper end of the mounting shell 6, and forms a first heat-insulating cavity 201 with the upper end of the mounting shell 6, so that the mounting shell 1 is sealed in the cavity below the high-temperature-resistant insulating plate 8, and three layers of heat-insulating protection are formed between the discharge electrode 4 and the transformer circuit unit 7, the first layer is the high-temperature-resistant insulating plate 8 directly blocking most of the heat conducted downward, the second layer is the first heat-insulating cavity 201 avoiding the high-temperature-resistant insulating plate 8 from directly contacting the mounting shell 6 to conduct heat, and the third layer is the mounting shell 6 blocking the heat in the first heat-insulating cavity 201 from being conducted to the transformer circuit unit 7. In this way, there is a good heat-insulating effect between the position of the discharge electrode 4 in the stove head 2 of the plasma stove 100 of the present invention and the transformer circuit unit, and the heat generated by the discharge electrode 4 is difficult to be conducted downward to the transformer circuit unit 7, so as to ensure that the transformer circuit unit 7 works reliably.

[0080] The above description is only an example to clearly illustrate the present invention, and does not limit the patent scope of the present invention. It is impossible to list all the implementation methods here. All equivalent structural changes made by using the contents of the technical solution of the present invention under the concept of the present invention, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A heat-insulated plasma stove, comprising a base, a stove head arranged on the base, and an electric control unit arranged on the base, wherein the stove head comprises a plurality of discharge electrodes exposed above the base, the stove head further comprises a voltage transformation module arranged below the discharge electrodes, the voltage transformation module comprises a mounting shell mounted on the base and a voltage transformation circuit unit arranged in the mounting shell, the voltage transformation circuit unit being electrically connected to the electric control unit and the discharge electrodes; It is characterized in that The stove head also includes a high temperature resistant insulating plate which covers the upper end of the mounting shell and is spaced apart from the upper end of the mounting shell to form a first heat insulation cavity, and the plurality of discharge electrodes are mounted on the high temperature resistant insulating plate; A plurality of wire posts are provided on the upper end of the installation shell, and two ends of each wire post are respectively located in the first heat insulation cavity and the installation shell; A first conductive member is electrically connected to the upper end of each conductor post in the first heat-insulating cavity, the first conductive member is electrically connected to a discharge electrode upward, and the lower end of each conductor post in the mounting shell is electrically connected to the transformer circuit unit.

2. The heat-insulated plasma cooker according to claim 1, characterized in that: The first conductive member is a first wire spring.

3. The heat-insulated plasma cooker according to claim 2, characterized in that: A second conductive member is spaced and electrically connected between the lower end of each conductive wire column in the installation shell and the upper end of the transformer circuit unit.

4. The heat-insulated plasma cooker according to claim 3, characterized in that: The second conductive member is a second wire spring.

5. The heat-insulated plasma cooker according to claim 4, characterized in that: The installation housing comprises an upper cover and a lower cover, and the transformer circuit unit is arranged in a cavity between the upper cover and the lower cover; The upper cover comprises a first cover plate portion and a second cover plate portion which are stepped downward from the inside to the outside, and a connecting ring which is vertically arranged at the periphery of the second cover plate portion, the first cover plate portion is penetrated by the plurality of wire posts, the upper end surface of the connecting ring is higher than the upper end surface of the first cover plate portion, and the upper end surface of the connecting ring overlaps with the lower end surface of the high temperature resistant insulating plate, and the lower end surface of the connecting ring overlaps with the upper end surface of the lower cover; The gap between the lower end surface of the high temperature resistant insulation board and the upper end surface of the first cover plate portion forms the first heat insulation cavity; A gap between the lower end surface of the first cover plate portion and the upper end surface of the transformer circuit unit forms a second heat-insulating cavity, and the plurality of second wire springs are accommodated in the second heat-insulating cavity.

6. The heat-insulated plasma cooker according to claim 5, characterized in that: The upper end surface of the connecting ring and the lower end surface of the high temperature resistant insulating plate are covered with a first supporting step protruding in an annular direction, and are sealed with a sealant; The upper end surface at the middle position of the first cover plate portion is also protrudingly provided with a second supporting step that abuts against the lower end surface at the middle position of the high temperature resistant insulation board.

7. The heat-insulated plasma cooker according to claim 5, characterized in that: A high temperature resistant insulating plate is provided at the bottom of the discharge electrode and a locking washer and a locking screw are exposed in the first heat insulation cavity; the upper end of the first wire spring is sleeved outside the locking screw and pressed against the locking washer; the lower end of the first wire spring is sleeved outside the upper end of the wire column and pressed against the upper end surface of the upper cover; The upper end of the second wire spring is sleeved outside the lower end of the wire column and pressed against the lower end surface of the upper cover, and the lower end of the second wire spring is pressed against the upper end of the transformer circuit unit.

8. The heat-insulated plasma cooker according to claim 5, characterized in that: The upper cover is made of plastic, and the lead post is integrally formed with the upper cover by injection molding.

9. The heat-insulated plasma cooker according to claim 1, characterized in that: A negative electrode for forming a discharge loop with a plurality of discharge electrodes is also arranged above the high temperature resistant insulation plate.

10. The heat-insulated plasma cooker according to claim 1, characterized in that: The electric control unit comprises a main control circuit, a power supply circuit electrically connected to the main control circuit, and an output end of the power supply circuit is electrically connected to an input end of the voltage conversion circuit unit; The electric control unit also includes a leakage detection circuit electrically connected to the main control circuit; A temperature sensor is also arranged on the outer wall of the installation shell and is electrically connected to the main control circuit.

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