CN112820502B

CN112820502B - High-frequency transformer structure for plasma oven and plasma oven

Info

Publication number: CN112820502B
Application number: CN202110127507.3A
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: CN112820502A

Abstract

The invention discloses a high-frequency transformer structure for a plasma oven and the plasma oven, wherein the transformer structure comprises an insulating bracket with an opening on one surface, and a mounting groove is concavely arranged on the opening surface of the insulating bracket; the transformer is accommodated in the mounting groove and comprises two U-shaped magnetic cores which are mutually abutted, and the two U-shaped magnetic cores enclose a closed frame; the transformer also comprises a first insulating sleeve, a second insulating sleeve and a primary coil, wherein the first insulating sleeve and the second insulating sleeve are sleeved on two connecting sides of the closed frame body, the primary coil is wound on the first insulating sleeve, and the secondary coil is wound on the second insulating sleeve; the self-adaptive tightening mechanism is abutted against one end of at least one U-shaped magnetic core so that the two U-shaped magnetic cores are kept in mutual abutting. The invention ensures that the transformer in the plasma oven has an anti-loosening effect, the two magnetic cores can still keep original contact after the bracket is deformed, the influence of the increase of the air gap on the efficiency of the transformer is avoided, and the heat dissipation is facilitated.

Description

High-frequency transformer structure for plasma oven and plasma oven

Technical Field

The invention relates to the technical field of stoves, in particular to a high-frequency transformer structure for a plasma stove and the plasma stove.

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 stove 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 a transformer is arranged in the plasma stove to boost the voltage.

The transformer of the plasma oven generally comprises a bracket and an iron core arranged in the bracket, and the iron core is generally formed by combining and installing two parts.

The structure of the transformer in the existing plasma oven has the following defects:

1. the coil is enclosed by a fully-enclosed bracket, which is unfavorable for heat dissipation.

2. When the transformer changes the high voltage of high-frequency alternating current, the generated heat is easy to cause deformation of the bracket, the connection part of the iron core in the transformer is easy to loosen after the bracket is deformed, the air gap is overlarge, and the magnetic resistance is increased to influence the efficiency of the transformer. The existing transformer in the plasma oven has no anti-loosening measure, so that the iron core is easy to loosen along with the deformation of the bracket, and the efficiency of the transformer is finally affected.

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

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a high-frequency transformer structure for a plasma oven and a plasma oven, which aims to make a transformer in the plasma oven have an anti-loosening effect, and two magnetic cores can still keep original contact after a bracket is deformed, so that the efficiency of the transformer is prevented from being affected due to the increase of an air gap, and meanwhile, heat dissipation is facilitated.

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

a high frequency transformer structure for a plasma oven, comprising:

an insulating bracket with an opening on one surface, wherein a mounting groove is concavely arranged on the opening surface of the insulating bracket;

the transformer is accommodated in the mounting groove and comprises two U-shaped magnetic cores which are mutually abutted, and the two U-shaped magnetic cores enclose a closed frame;

the transformer also comprises a first insulating sleeve, a second insulating sleeve and a primary coil, wherein the first insulating sleeve and the second insulating sleeve are sleeved on two connecting sides of the closed frame body, the primary coil is wound on the first insulating sleeve, and the secondary coil is wound on the second insulating sleeve;

the self-adaptive tightening mechanism is abutted against one end of at least one U-shaped magnetic core so that the two U-shaped magnetic cores are kept in mutual abutting.

The self-adaptive tightening mechanism comprises an adjusting gap formed between the end face of the closed frame body and the inner wall of the insulating bracket, and an adjusting inclined block inserted into the adjusting gap and fixed on the insulating bracket.

The self-adaptive tightening mechanism further comprises a push rod structure, wherein the push rod structure comprises a push rod hole penetrating through one end of the insulating support and communicated with the mounting groove, and the push rod is screwed into the push rod hole and is abutted to one end face of the closed frame body.

The insulation support is provided with two mounting grooves for mounting two transformers, two primary coils of the two transformers are connected in parallel, and two secondary coils of the two transformers are connected in series.

Wherein, a plurality of partial pressure baffles are arranged on the second insulating sleeve at intervals.

Wherein, an anti-creepage rib plate is arranged between the primary coil and the secondary coil in each mounting groove;

the anti-creep rib plate position still is equipped with the spliced pole, is provided with the connecting hole that wears out insulating support on the spliced pole.

And the wire outlet end of the second insulating sleeve is provided with an anti-creepage shielding groove.

The first insulating sleeve and the second insulating sleeve are respectively provided with a first positioning groove block and a second positioning groove block which are in butt joint with the bottom surface of the mounting groove;

an air gap piece which is abutted with the two U-shaped magnetic cores is further arranged between the two U-shaped magnetic cores.

The invention also provides a plasma stove which comprises a high-voltage bag, wherein a closed cavity is formed in the high-voltage bag, the transformer structure is arranged in the closed cavity, the insulating support is hung and fixed in the closed cavity with an opening facing downwards, and transformer oil is poured into the closed cavity.

The invention relates to a high-frequency transformer structure for a plasma oven, which is characterized in that an insulating bracket with an opening at one end face is arranged, a transformer is arranged in the insulating bracket, the transformer comprises two U-shaped magnetic cores which are oppositely arranged, and at least one end of the transformer is provided with a self-adaptive tightening mechanism which is always abutted against one end of one U-shaped magnetic core, so that mutual abutting of the two U-shaped magnetic cores in the transformer is kept. Therefore, in the heating process of the transformer coil, after the insulating support is deformed due to the physical effect of thermal expansion and cold contraction, the two U-shaped magnetic cores can always keep an initial abutting state, and the efficiency of transformation is not affected due to the fact that an air gap between the two magnetic cores is increased due to deformation. Meanwhile, the insulating support adopts an opening structure instead of a closed structure, so that the transformer can rapidly dissipate heat.

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 structure view of a first embodiment of a high frequency transformer structure for a plasma oven according to the present invention;

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

FIG. 3 is an exploded view of the transformer of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 1;

FIG. 5 is a schematic view showing the structure of a first embodiment of a plasma oven according to the present invention; the method comprises the steps of carrying out a first treatment on the surface of the

Fig. 6 is a schematic cross-sectional view of the cooking range of fig. 5.

Reference numerals illustrate:

100-transformer structure, 1-insulating support, 11-opening, 12-mounting groove, 121-creepage preventing rib plate, 122-connecting column, 1221-connecting hole, 2-transformer, 21-closed frame, 211-U-shaped magnetic core, 212-air gap piece, 22-first insulating sleeve, 221-first positioning groove block, 23-second insulating sleeve, 231-partial pressure partition plate, 232-creepage preventing shielding groove, 233-second positioning groove block, 3-self-adapting adjusting mechanism, 31-adjusting gap, 32-adjusting inclined block, 33-ejector rod structure, 331-ejector rod, 332-ejector rod hole, 200-base, 300-cooking range, 400-high voltage package, 401-upper cover, 402-shielding shell, 403-closed cavity and 500-plasma cooking range.

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 3, the present invention provides a high frequency transformer structure 100 for a plasma oven, comprising: an insulating bracket 1 with one surface opened 11, and a mounting groove 12 is concavely arranged on the opening surface of the insulating bracket 1. The insulating support 1 can be made of plastic. Because one surface of the insulating support 1 is provided with an opening 11, the insulating support is favorable for rapid heat dissipation after heat generation of the coil in the transformer.

The transformer 2 is accommodated in the installation groove 12, the transformer 2 comprises two mutually abutted U-shaped magnetic cores 211, the two U-shaped magnetic cores 211 enclose a closed frame 21, and as shown in fig. 3, the U-shaped protruding walls of the two U-shaped magnetic cores 211 mutually abutted and enclose the closed frame 21. In the embodiment of the invention, the U-shaped magnetic core 211 adopts a ferrite soft magnetic core, so as to ensure the excitation effect in the high-frequency transformer circuit. The closed frame 21 enclosed by the two U-shaped magnetic cores 211 forms a magnetic circuit to complete electromagnetic conversion.

The transformer 2 further includes a first insulating sheath 22 and a second insulating sheath 23 which are sleeved on both connection sides of the closed frame 21, and a primary coil (not shown) wound on the first insulating sheath 22, and a secondary coil (not shown) wound on the second insulating sheath 23. The primary coil inputs the low voltage and the secondary coil outputs the high voltage, thereby realizing the boost conversion of the voltage. The transformer structure 100 of the present invention may be provided with a plurality of mounting slots 12 to mount a plurality of transformers 2.

As shown in fig. 1, the transformer structure 100 of the present invention further includes an adaptive tightening mechanism 3 that abuts against one end of at least one U-shaped magnetic core 211 so that the two U-shaped magnetic cores 211 remain abutted against each other. The self-adaptive tightening mechanism 3 is always abutted against one U-shaped magnetic core 211, so that the two U-shaped magnetic cores 211 are always kept in a tight abutting state. Thus, in the working process of the transformer 2, even if the insulating support 1 deforms due to the physical effect of thermal expansion and contraction, the self-adaptive tightening mechanism 3 can also automatically adjust to be abutted against the U-shaped magnetic cores 211, and the two U-shaped magnetic cores 211 can always keep an initial abutting state, so that the problem that the efficiency of the transformer is affected due to the increase of the air gap between the two magnetic cores 211 caused by the deformation of the insulating support 1 in the prior art is avoided.

Specifically, as shown in fig. 4, the adaptive tightening mechanism 3 of the present invention includes an adjustment gap 31 formed between the end surface of the closed frame 21 and the inner wall of the insulating bracket 1, and an adjustment slope 32 inserted into the adjustment gap 31 and fixed to the insulating bracket 1. The adjusting inclined block 32 plays a role in self-adaptive adjustment, when in installation, the adjusting inclined block 32 is tightly pressed against one end of the closed frame body 21 (one U-shaped magnetic core 211), and the adjusting inclined block 32 is elastically deformed, so that even if the insulating support 1 is deformed to enlarge the distance between two ends of the mounting groove 12, the elastic deformation of the adjusting inclined block 32 can still keep clamping the two U-shaped magnetic cores 211 all the time after the distance between the mounting groove 12 is enlarged.

Preferably, the adjustment ramp 32 of the present invention is a resilient ramp that facilitates adjustment of the clamping force between the adjustment ramp 32 and the closure frame 21.

Preferably, the upper end and the lower end of the closed frame 21 are both provided with the adjusting inclined blocks 32, namely, the two opposite end surfaces of the two U-shaped magnetic cores 211 are both provided with the adjusting inclined blocks 32 to firmly clamp the two U-shaped magnetic cores 211.

It will be appreciated that the adaptive tightening mechanism 3 of the present invention may also be configured as a spring ejector mechanism to automatically clamp the two U-shaped cores 211.

Further, as shown in fig. 1 and 2, the self-adaptive tightening mechanism 3 further includes a ram structure 33, the ram structure 33 includes a ram 331, a ram hole 332 penetrating through one end of the insulating support 1 and communicating with the mounting groove 12, and the ram 331 is screwed into the ram hole 332 and abuts against one end surface of the closed frame 21.

The ejector rod structure 33 is arranged to clamp the two U-shaped magnetic cores 211 in advance and then is matched with the adjusting inclined block 32 to realize self-adaptive tightening.

In the embodiment of the present invention, as shown in fig. 1, the insulating bracket 1 is provided with two mounting slots 12 for mounting two transformers 2, two primary coils of the two transformers 2 are connected in parallel, and two secondary coils of the two transformers 2 are connected in series. The invention adopts the arrangement mode that 2 primary coils of two transformers are connected in parallel and 2 secondary coils are connected in parallel, can doubly improve the voltage of the output end of the transformers 2, and can obtain higher output voltage to meet the boosting requirement on the premise of the same number of transformers 2.

Preferably, as shown in fig. 3, a plurality of voltage dividing partitions 231 are disposed on the second insulating cover 23 of the transformer 2 of the present invention at intervals. The voltage dividing partition 231 can divide the coils on the second insulating sleeve 23 into groups to achieve the purpose of voltage division, so as to meet different voltage regulation requirements.

Further, as shown in fig. 2, an anti-creepage rib 121 is further disposed between the primary coil and the secondary coil in each of the mounting grooves 12. As a result of the very high voltage output from the secondary coil, creepage is easily caused between the high voltage and the low voltage to damage the insulating bracket 1, and the creepage arc between the primary coil and the secondary coil needs to turn over the two surfaces of the creepage preventing rib plate 121, the creepage distance is increased, and the creepage can be prevented.

As shown in fig. 4, the anti-creepage rib 121 is further provided with a connection post 122, and the connection post 122 is provided with a connection hole 1221 penetrating out of the insulating bracket 1. The connection post 122 is used to mount the entire transformer structure 100 to other structures.

Preferably, as shown in fig. 2 and 3, the outgoing line ends of the second insulating sleeves 23 on the two transformers 2 of the present invention are provided with anti-creep shielding grooves 232. The high voltage is output from the outlet end of the second insulating sleeve 23, and the connection wire of the outlet end is shielded in the anti-creepage shielding groove 232 by the arrangement of the anti-creepage shielding groove 232, so that creepage can be effectively prevented, and damage to the wiring position due to creepage is avoided.

Preferably, as shown in fig. 4, a first positioning groove block 221 and a second positioning groove block 233 are respectively arranged on the first insulating sleeve 22 and the second insulating sleeve 23 of the transformer 2 of the present invention, and are abutted against the bottom surface of the mounting groove 12. The first positioning groove block 221 and the second positioning groove block 233 enable the first insulating sleeve 22 and the second insulating sleeve 23 to be positioned and installed in the installation groove 12 of the insulating bracket 1 rapidly, and the first insulating sleeve 22 and the second insulating sleeve 23 are prevented from rotating in the installation groove 12 to affect installation.

Preferably, as shown in fig. 2, an air gap piece 212 abutting against the two U-shaped magnetic cores 211 is further provided between the two U-shaped magnetic cores 211 of the present invention. The air gap piece 212 allows a certain gap to be left between the two U-shaped magnetic cores 211 after abutting, so that magnetic saturation is prevented.

The invention also provides a plasma kitchen range 500, which comprises a high-voltage bag 400, wherein a closed cavity 403 is formed in the high-voltage bag 400, the transformer structure 100 is arranged in the closed cavity 403, an opening 11 of the insulating support 1 is hung downwards and fixed in the closed cavity 403, and transformer oil is poured into the closed cavity 201.

As shown in fig. 5, the plasma cooking range 500 includes a base 200, a cooking range 300 provided on the base 200, and the cooking range 300 includes the high pressure package 400, and the high pressure package 400 is installed in the base 200. The high voltage package 400 is used to mount a high voltage circuit portion, which in the embodiment of the present invention is the high frequency transformer structure 100 of the present invention.

As shown in fig. 6, the high-voltage package 400 includes an upper cover 401 and a metal shielding shell 402, where the upper cover 401 and the shielding shell 402 enclose a closed cavity 403, and the closed cavity 403 accommodates the transformer structure 100. In the plasma oven 500 of the present invention, the opening 11 of the insulating support 1 of the transformer structure 100 is suspended and fixed in the closed cavity 403 downward, so that the upper and lower bottom surfaces of the transformer structure 100 are not contacted with the bottom surface and the top surface in the high-voltage package 400, which is beneficial to heat dissipation. The transformer structure 100 of the present invention is suspended in the closed cavity 403 by connecting and fixing the connecting post 122 on the insulating bracket 1 and the upper cover 401 of the high voltage package 400.

Further, the enclosed cavity 403 of the plasma cooker 500 is filled with transformer oil. In this way, the heat generated by the transformer 2 can be quickly led out to the shell of the high-voltage package 400 and outwards, and meanwhile, the transformer oil plays a good insulating role.

According to the high-frequency transformer structure 100 for the plasma oven and the plasma oven 500 provided by the embodiment of the invention, the insulating support 1 with the end face opening 11 is arranged, the transformer 2 is arranged in the insulating support 1, the transformer 2 comprises two U-shaped magnetic cores 211 which are oppositely arranged, and the self-adaptive tightening mechanism 3 is arranged at least one end of the transformer 2 and is always abutted against one end of one U-shaped magnetic core 211, so that mutual abutting of the two U-shaped magnetic cores 211 in the transformer 2 is kept. In this way, in the heating process of the coil of the transformer 2, after the insulating support 1 is deformed due to the physical effect of thermal expansion and cold contraction, the two U-shaped magnetic cores 211 can always maintain the initial abutting state, and the efficiency of the transformer 2 is not affected due to the increase of the air gap between the two magnetic cores 211 caused by deformation. Meanwhile, the insulating support 1 adopts an opening structure instead of a closed structure, so that the transformer 2 can rapidly dissipate heat.

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. A high frequency transformer structure for a plasma oven, comprising:

the self-adaptive tightening mechanism is abutted against one end of at least one U-shaped magnetic core so that the two U-shaped magnetic cores are kept in mutual abutting;

the self-adaptive tightening mechanism comprises an adjusting gap formed between the end face of the closed frame body and the inner wall of the insulating support, an adjusting inclined block which is inserted into the adjusting gap and fixed on the insulating support, the adjusting inclined block is an elastic inclined block, two opposite wall faces of the adjusting inclined block are respectively abutted against the insulating support and the U-shaped magnetic core, the adjusting inclined block is in an elastic deformation state after being abutted against the insulating support and the U-shaped magnetic core, and the elastic deformation of the adjusting inclined block always keeps the two U-shaped magnetic cores clamped.

2. The structure of claim 1, wherein the adaptive tightening mechanism further comprises a push rod structure, the push rod structure comprises a push rod hole penetrating through one end of the insulating support and communicated with the mounting groove, and the push rod is screwed into the push rod hole and is abutted against one end face of the closed frame.

3. The structure of claim 1, wherein the insulating bracket is provided with two mounting grooves for mounting two transformers, two primary coils of the two transformers are connected in parallel, and two secondary coils of the two transformers are connected in series.

4. The structure of claim 1, wherein the second insulating cover is provided with a plurality of dividing partitions at intervals.

5. The high-frequency transformer structure for a plasma oven according to claim 1, wherein an anti-creep rib is further provided between the primary coil and the secondary coil in each of the installation grooves;

6. The structure of claim 1, wherein the second insulating sleeve is provided with an anti-creep shielding groove at the outlet end.

7. The structure of claim 1, wherein the first insulating sleeve and the second insulating sleeve are respectively provided with a first positioning groove block and a second positioning groove block which are abutted with the bottom surface of the mounting groove;

8. A plasma kitchen, including the high-pressure package, be formed with airtight cavity in the high-pressure package, characterized in that, be provided with the transformer structure of any one of claims 1-7 in the airtight cavity, insulating support opening hangs down to be fixed in airtight cavity in, and the airtight cavity is filled with transformer oil.