CN112953452A - Symmetric double-output radio frequency resonance generator - Google Patents
Symmetric double-output radio frequency resonance generator Download PDFInfo
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- 238000005859 coupling reaction Methods 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 230000001954 sterilising effect Effects 0.000 claims abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 5
- 230000007704 transition Effects 0.000 claims description 29
- 230000000903 blocking effect Effects 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
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- 239000003985 ceramic capacitor Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- 230000000749 insecticidal effect Effects 0.000 claims description 4
- 230000009123 feedback regulation Effects 0.000 claims 2
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- 238000010586 diagram Methods 0.000 description 4
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- 230000008859 change Effects 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/24—Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive
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Abstract
The invention discloses a bottom edge double-output high-frequency resonance generator for disinsection and sterilization, and belongs to the technical field of disinsection and sterilization. The symmetrical double-output radio frequency resonance generator comprises a side-output high-frequency resonance generator and a distributed resonance circuit formed by adopting a semi-closed box structure to distribute parameters, wherein the distributed resonance circuit structure comprises a box metal shell, a high-frequency resonant cavity, a vacuum tube box, a resonant cavity output polar plate, a resonance adjusting capacitor polar plate and an output coupling polar plate. The distributed resonant cavity type radio frequency generator formed by the distributed parameters has the advantages of simple structure, convenience in adjustment, high resonant frequency stability, low cost, long service life and the like, and is easy to popularize and implement commercially.
Description
Technical Field
The invention relates to a symmetrical double-output radio frequency resonance generator, in particular to a symmetrical double-output radio frequency resonance generator.
Background
The radio frequency is a high-frequency alternating electromagnetic wave with a frequency range of 3-300 MHz. The radio frequency bands permitted in the industry are 13.56, 27.12 and 40.68 MHz. The frequency is relatively lower than that of the microwave, so that the microwave oven has a deeper penetrating effect on materials. Under the action of radio frequency high-frequency magnetic field, the polar molecules rotate reciprocally and the charged ions move reciprocally, so that the polar molecules and charged ions in the non-metal material (agricultural product) placed in the high-frequency electromagnetic field produce friction with the peripheral molecules to generate heat, and the water-contained sample can be heated in the whole volume at the same time, so that the temp. raising rate of sample can be raised. The agricultural products are selectively heated by utilizing the principle of different dielectric loss factors, so that the purposes of killing insects and sterilizing are achieved. The medium is heated uniformly and rapidly by adopting a radio frequency mode, and has the characteristic of selective heating, so that the radio frequency heating is an ideal and effective cold heating means. In the field of crop (or food) disinsection and sterilization, pests and bacteria are selectively and rapidly heated to destroy the protein structure of the pests and bacteria, so that the effect of killing the pests and bacteria is achieved, and the crops (or food) are heated less, so that the nutritional ingredients are preserved, and the taste is good, so that the crop (or food) has a very bright application prospect.
Compared with a lumped parameter LC resonant circuit, the distributed parameter LC resonant circuit has more stable frequency, and the distributed parameter LC resonant circuit is less influenced by skin, has high frequency stability and is not easy to generate frequency deviation. The lumped parameter LC resonant circuit is easy to shift in frequency, interference is caused to nearby wireless equipment, circuit components with higher price and better electrical characteristics need to be selected, and equipment cost is increased. In addition, the problems of aging, electrical characteristic reduction and the like easily occur to the centralized parameter element under the working environment of high frequency and high voltage, so that the whole device is unstable in working, low in working efficiency, potential safety hazards and the like.
Disclosure of Invention
The purpose of the invention is as follows: a symmetric dual-output radio frequency resonance generator solves the problems in the prior art.
The technical scheme is as follows: symmetrical double-output radio frequency resonance generator, including the power supply unit, with the power supply unit links together high-voltage rectification unit, with the radio frequency resonance generator unit that the high-voltage rectification unit links together, with the load output unit that radio frequency resonance generator unit connector is in the same place, and one end with load output unit link together, the other end with the circuit control module that the high-voltage rectification unit links together.
In a further embodiment, the radio frequency resonance generator unit comprises a box body, the box body is designed to be a fully-enclosed box body structure, a resonance circuit control unit is arranged in the box body, the resonance circuit control unit comprises a shell, a perforated capacitor arranged on the shell, a filament choke coil connected with the perforated capacitor, a resonant cavity output polar plate connected with the filament choke coil, a grid feedback adjusting inductor arranged in the shell, a grid high-frequency choke coil connected with the grid feedback adjusting inductor, an insulating support connected with the grid high-frequency choke coil, an insulating plate, a resonance adjusting capacitor polar plate arranged in the shell, and a vacuum electron tube arranged in the shell, wherein one side of the insulating plate is connected with the other side of the insulating plate, the other side of the insulating plate is arranged on the inner wall of the shell, the output electrode plate connection transition plate is arranged on the upper surface of the anode choke coil, the output electrode plate connection transition plate is arranged in the shell, the output electrode mounting base is arranged on the upper surface of the shell, the output electrode plates are arranged in the shell and positioned at two sides of the output electrode mounting base, the load capacitor electrode plate is arranged at one end of the output electrode mounting base, and the output electrode arranged at the other end of the output electrode mounting base is connected with a soft copper foil;
the shell is divided into a vacuum pipe box and a high-frequency resonance cavity; the vacuum pipe box is positioned in the high-frequency resonant cavity;
the anode choke coil and the output pole plate are connected with the transition plate, the output coupling pole plate and the load capacitor pole plate and are arranged inside the vacuum tube box.
In a further embodiment, in the high-frequency resonant cavity, the resonant output polar plate is reversely buckled on the vacuum tube box and fixed with the top of the vacuum tube box by screws, and gaps exist between the outer surface of the resonant output polar plate, the inner surface of the shell and the high-frequency resonant cavity to form an air capacitor;
meanwhile, the inductance of the resonance output polar plate forms the main inductance of the resonance circuit; the main inductor and the air capacitor are connected in parallel to form a main loop which is distributed to form a resonant circuit and is used for vacuum electron tube radio frequency oscillation.
In a further embodiment, the resonant cavity output plate inductor is coupled with the output coupling plate inductor to form a form of a coupling transformer, so as to realize electric energy feeding; the output coupling polar plate extends out from the bottom edge of the box body through the output transition polar plate and the output soft copper foil and is connected with the load capacitor.
In a further embodiment, the output coupling polar plate is supported by the insulating base, one end of the output coupling polar plate is used for feeding radio frequency power to the radio frequency insecticidal sterilization system, and the other end of the output coupling polar plate is wound out of the bottom of the box body to the upper part of the box body and returns to the grid of the vacuum tube as feedback.
In a further embodiment, the position of the output coupling polar plate can move up and down for load matching;
the resonance adjusting capacitor plate can be finely adjusted up and down.
In a further embodiment, the housing of the box is grounded; the entire metal housing serves both as a conductor part of the resonator generator and as a ground.
In a further embodiment, a forced air cooling device for cooling the triode valve is further arranged outside the shell;
the circuit control module comprises an anode bypass capacitor C1, a ceramic capacitor C3, an air capacitor C3 and a grid blocking capacitor C4 which are C4 of a grid bypass capacitor, a grid bypass capacitor C5, a feedback bypass capacitor C6, a cathode bypass capacitor C7, a load capacitor C0, a transformer T, a vacuum tube V, a grid leakage resistor R, an anode choke coil L1, a grid feedback adjusting inductor L2, a grid high-frequency choke coil L3, a filament choke coil L4 and a feedback high-frequency choke coil L5;
wherein one end of the anode bypass capacitor C1 is connected to one end of the anode choke coil L1, the other end of the anode bypass capacitor C1 is connected to the negative electrode of the power supply, the other end of the anode choke coil L1 is connected to the anode of the vacuum electron tube V, one end of the cathode of the vacuum electron tube V is connected to one end of the cathode bypass capacitor C7, the other end of the cathode of the vacuum electron tube V is connected to the filament choke coil L4, the other end of the cathode bypass capacitor C7 is connected to the filament power supply, the other end of the filament choke coil L4 is connected to the filament power supply, the gate of the vacuum electron tube V is connected to one end of the gate feedback adjusting inductor L2, and the other end of the gate feedback adjusting inductor L2 is connected to one ends of the gate blocking capacitor C4 and the gate choke high frequency coil L3, the other end of the gate blocking capacitor C4 is grounded, the other end of the gate high-frequency choke coil L3 is connected with one end of the gate bypass capacitor C5 and one end of the gate leakage resistor R, the other end of the gate bypass capacitor C5 is grounded, the other end of the gate leakage resistor R is grounded, the anode of the vacuum electron tube V is further connected with one end of the ceramic capacitor C3, the other end of the ceramic capacitor C3 is connected with one end of the air capacitor C3 and one end of the transformer T, the other end of the air capacitor C3 is grounded, the other end of the transformer T is connected with the feedback high-frequency choke coil L5, the other end of the feedback high-frequency choke coil L5 is connected with the feedback bypass capacitor C6, one end of the feedback high-frequency choke coil L5 and one end of the feedback bypass capacitor C6 are further connected with one end of the gate leakage resistor R, the other end of the feedback bypass capacitor C6 is grounded.
In a further embodiment, the box body is designed to be a totally-enclosed box body structure and comprises a first cavity, a second cavity and a third cavity, and the shell of the box body is grounded;
the filament choke coil, the grid feedback adjusting inductor and the grid high-frequency choke coil are arranged in the first cavity;
one end of the filament choke coil is led in from the outside through a perforated capacitor, and the other end of the filament choke coil is connected to a cathode K of the vacuum electron tube.
In a further embodiment, the rf resonance generator unit further includes an output transition pole connected to the output pole plate, an output pole connection transition plate connected to the output transition pole connection plate, and an output coupling pole plate connected to the output pole connection transition plate, wherein an end of the output coupling pole plate is connected to the output pole mounting base.
Has the advantages that: the invention discloses a distributed resonant circuit formed by a symmetrical double-output radio frequency resonance generator by adopting a totally-enclosed box structure distribution parameter, which has the advantages of simple circuit structure, convenient adjustment, high oscillation frequency stability, low cost, long service life and the like, has quite high frequency stability, the oscillation frequency can be stabilized within +/-0.8% of the central frequency, meanwhile, the shell of the box is grounded, the whole metal shell is used as a conductor part of a resonant cavity type generator and is also used as a grounding end, a good shielding effect is realized on high-frequency radiation, the manufacturing cost is reduced, and simultaneously, the high-frequency radiation is greatly prevented.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a lumped parameter equivalent circuit diagram of the circuit control module of the present invention.
Fig. 3 is a schematic structural diagram 2 of the present invention.
Fig. 4 is a top view of the present invention.
Fig. 5 is a front view of the present invention.
Fig. 6 is a schematic diagram of an output circuit of the rf insecticidal and germicidal system of the present invention.
The reference signs are: a power supply unit 1, a high-voltage rectification unit 2, a radio frequency resonance generator unit 3, a load output module 4, a circuit control module 5, a high-frequency resonance cavity 6, a vacuum tube box 7, a shell 8, a perforated capacitor 9, a filament choke coil 10, a grid feedback adjusting inductor 11, a grid high-frequency choke coil 12, an insulating support 13, an insulating plate 13-1, a resonant cavity output polar plate 14, a resonance adjusting capacitor polar plate 15, a vacuum electron tube 16, an anode choke coil 17, an output polar plate connecting transition plate 18, an output coupling polar plate 19, an output electrode mounting base 20, a load capacitor polar plate 21, an output electrode connecting soft copper foil 23, an output transition electrode 24, a resonant cavity inner tube 26, a resonant cavity high-voltage capacitor 27, a vacuum tube anode connecting plate 28, an anode connecting bottom plate 29, a sealing plate 30, a vacuum tube 31, an electron tube anode 32, an insulating support 33, an, Load capacitor plate 39, and load capacitor C040.
Detailed Description
Through research and analysis of the applicant, compared with a lumped parameter LC resonant circuit, the distributed parameter LC resonant circuit used in the prior art has more stable frequency, and the distributed parameter LC resonant circuit is less influenced by skin, has high frequency stability and is not easy to generate frequency deviation. The lumped parameter LC resonant circuit is easy to shift in frequency, interference is caused to nearby wireless equipment, circuit components with higher price and better electrical characteristics need to be selected, and equipment cost is increased. In addition, the problems of aging, electrical characteristic reduction and the like easily occur to the centralized parameter element under the working environment of high frequency and high voltage, so that the whole device is unstable in working and low in working efficiency. In light of these problems, the applicant proposes a symmetric dual-output rf resonance generator, which is as follows.
As shown in fig. 1, the symmetric dual-output rf resonance generator is composed of a power supply unit 1, a high-voltage rectification unit 2, an rf resonance generator unit 3, a load output module 4, and a circuit control module 5.
The high-voltage rectification unit 2 is connected with the power supply unit 1, the radio frequency resonance generator unit 3 is connected with the high-voltage rectification unit 2, the load output module 4 is connected with the radio frequency resonance generator unit 3, one end of the circuit control module 5 is connected with the load output module 4, and the other end of the circuit control module are connected with the high-voltage rectification unit 2.
As shown in fig. 3, the radio frequency resonance generator unit 3 includes a high frequency resonance cavity 6, a vacuum tube 31 box 7, a housing 8, a perforated capacitor 9, a filament choke coil 10, a grid feedback adjusting inductor 11, a grid high frequency choke coil 12, an insulating support 13 and an insulating plate 13, a resonance cavity output plate 14, a resonance adjusting capacitor plate 15, a vacuum electron tube 16, an anode choke coil 17, an output plate connecting transition plate 18, an output coupling plate 19, an output electrode mounting base 20, a load capacitor C040 plate 21, an output plate 22, and an output electrode connecting soft copper foil 23; the box body is arranged at a preset position, the box body is designed into a totally-enclosed box body structure, the shell 8 comprises a first cavity, a second cavity and a third cavity, and the shell 8 of the box body is grounded; the filament choke coil 10, the grid feedback adjusting inductor 11 and the grid high-frequency choke coil 12 are arranged in the first cavity; one end of the filament choke coil 10 is led in from the outside by a perforated capacitor 9, and the other end of the filament choke coil 10 is connected to a cathode K of a vacuum electron tube 16. The resonant circuit control unit is arranged in the box body, the perforated capacitor 9 is arranged in the shell 8, the filament choke coil 10 is connected with the perforated capacitor 9, the resonant cavity output electrode plate 14 is connected with the filament choke coil 10, the grid feedback adjusting inductor 11 is arranged in the shell 8, the grid high-frequency choke coil 12 is connected with the grid feedback adjusting inductor 11, the insulating support 13 is connected with the grid high-frequency choke coil 12, one side of the insulating plate 13-1 is connected with the insulating plate 13-1, the other side of the insulating plate 13-1 is arranged on the inner wall of the shell 8, the resonant adjusting capacitor electrode plate 15 is arranged in the shell 8, the vacuum electron tube 16 is arranged in the shell 8, the anode choke coil 17 is arranged in the shell 8, the output electrode connecting transition plate 18 is disposed on the anode choke coil 17, the output electrode mounting base 20 is disposed on the housing 8, the output electrode is disposed inside the housing 8 and on both sides of the output electrode mounting base 20, the load capacitor C040 electrode plate 21 is disposed on one end of the output electrode mounting base 20, and the output electrode connecting soft copper foil 23 is disposed on the other end of the output electrode mounting base 20. The radio frequency resonance generator unit 3 further comprises an output transition pole 24 connected with the output pole plate, an output pole connection transition plate 37 connected with a connection plate of the output transition pole 24, and an output coupling pole plate 19 connected with the output pole connection transition plate 37, wherein the end part of the output coupling pole plate 19 is connected with the output pole mounting base 20.
Specifically, the natural working frequency of the resonant cavity type radio frequency generator is 27.12MHz (determined by a cavity structure), and the working and the stopping of the oscillating circuit are realized by applying negative bias voltage to a grid electrode. As shown in fig. 3, the resonant rf generator is divided into a first cavity, a second cavity and a third cavity, wherein an outer shell 8 in the box body is grounded, the first cavity is used for placing electrical components with larger volume, such as a filament choke coil 10, a grid feedback adjusting inductor 11 and a grid high-frequency choke coil 12, wherein one end of the filament choke coil 10 is led in from the outside through a perforated capacitor 9, and the other end is connected to a cathode K of a vacuum electron tube 16; the grid feedback adjusting inductor 11 can move up and down to adjust the inductance of the grid feedback adjusting inductor, one end of the grid feedback adjusting inductor 11 is connected with a grid G of the vacuum tube 31, and the other biological end of the grid feedback adjusting inductor 11 is connected with a grid high-frequency choke 12 and then is connected out of the lower cavity through the perforated capacitor 9 to enter the lower cavity to form a feedback circuit. The second chamber portion is a high-frequency resonance chamber 6, and a vacuum electron tube 16 is housed inside the high-frequency resonance chamber 6. The third cavity is used for wiring and placing a filament transformer and a ventilation pipeline. The inside of the high-frequency resonant cavity 6 is divided into a vacuum electron tube 16 box, a resonance part and an output part. In a vacuum electron tube 16 case, a vacuum electron tube 16V is fixed by an insulating support 13 and an insulating plate 13-1, an anode A of the vacuum electron tube 16 is connected to an anode choke 17 and then enters a lower chamber to perform wiring, and cooling of the whole vacuum electron tube 16 case depends on a forced air cooling device installed at the bottom (installed outside the apparatus). The resonance part is formed by the relative position structure of the shell 8 of the box body, the resonant cavity output pole plate 14 and the resonance adjusting capacitor pole plate 15, the inner surface of the upper plane of the resonant cavity output pole plate 14 is welded with the upper surface of the vacuum tube 31 and the box 7, and a gap is reserved between the resonance adjusting capacitor pole plate 15 and the box body shell 8 at the left end of the high-frequency resonance cavity 6 to form an air capacitor C3. The resonance adjusting capacitor plate 15 can move up and down to adjust the capacitance, so that the anode resonance frequency is adjusted, the expensive vacuum adjustable capacitor is omitted, and the adjustment and the maintenance are easy. The resonant cavity output pole plate 14 forms a resonant inductor by virtue of the structural characteristics of the resonant cavity output pole plate 14, and the resonant cavity output pole plate 14 is coupled with the self inductor of the output coupling pole plate 19 of the output part to form a coupling transformer T, so that energy transfer is realized. The output coupling polar plate 19 is fixed at the right end in the high-frequency resonant cavity 6 through an output pole mounting base 20, the output polar plate is connected with a transition plate 18 and welded on the output coupling polar plate 19, and the output coupling polar plate is connected with a load capacitor C040 through a soft copper foil.
As a preferred embodiment: the shell 8 is divided into a vacuum tube 31 box 7 and a high-frequency resonant cavity 6; the vacuum tube 31 box 7 is positioned in the high-frequency resonant cavity 6, and the anode choke coil 17, the output pole plate connecting transition plate 18, the output coupling pole plate 19 and the load capacitor C040 pole plate 21 are arranged in the vacuum tube 31 box 7.
As a preferred embodiment: in the high-frequency resonant cavity 6, a resonant output polar plate is reversely buckled on the vacuum electron tube 16 box and is fixed with the top of the vacuum electron tube 16 box by screws, and gaps exist between the outer surface of the resonant output polar plate, the inner surface of the box body metal shell 8 and the high-frequency resonant cavity 6 to form air capacitance; meanwhile, the inductance of the resonance output polar plate forms the main inductance of the resonance circuit; the main inductor and the air capacitor are connected in parallel to form a distributed resonant circuit formed by distributed parameters, and the distributed resonant circuit is used as a main loop of the radio frequency oscillation of the vacuum electron tube 16. The resonant cavity output polar plate 14 is inductively coupled with the output coupling polar plate 19 to form a coupling transformer form, so that electric energy feeding is realized; the output coupling polar plate 19 is led out from the bottom edge of the box body through an output transition polar plate and an output soft copper foil and is connected with a load capacitor polar plate 39.
Specifically, the shell 8 of the box body is grounded; the whole metal shell 8 is used as a conductor part of the resonant cavity type generator and is also used as a grounding end, so that a good shielding effect is achieved on high-frequency radiation, the manufacturing cost is reduced, and the high-frequency radiation is greatly prevented. A forced air cooling device for cooling the triode vacuum tube 31 is further arranged on the outer side of the shell 8;
the circuit control module 5 comprises an anode bypass capacitor C1, a ceramic capacitor C3, an air capacitor C3 and a grid blocking capacitor C4 which are C4 of a grid bypass capacitor, a grid bypass capacitor C5, a feedback bypass capacitor C6, a cathode bypass capacitor C7, a load capacitor C040, a transformer T, a vacuum tube V, a grid leakage resistor R, an anode choke coil L1, a grid feedback adjusting inductor L2, a grid high-frequency choke coil L3, a filament choke coil L4 and a feedback high-frequency choke coil L5; wherein one end of the anode bypass capacitor C1 is connected to one end of the anode choke coil L1, the other end of the anode bypass capacitor C1 is connected to the negative electrode of the power supply, the other end of the anode choke coil L1 is connected to the anode of the vacuum electron tube V, one end of the cathode of the vacuum electron tube V is connected to one end of the cathode bypass capacitor C7, the other end of the cathode of the vacuum electron tube 16V is connected to the filament choke coil L4, the other end of the cathode bypass capacitor C7 is connected to the filament power supply, the other end of the filament choke coil L4 is connected to the filament power supply, the gate of the vacuum electron tube 16V is connected to one end of the gate feedback adjusting inductor L2, the other end of the gate feedback adjusting inductor L2 is connected to one ends of the gate blocking capacitor C4 and the gate high frequency inductor L3, the other end of the gate blocking capacitor C4 is grounded, the other end of the gate high-frequency choke coil L3 is connected with one end of the gate bypass capacitor C5 and one end of the gate leakage resistor R, the other end of the gate bypass capacitor C5 is grounded, the other end of the gate leakage resistor R is grounded, the anode of the vacuum electron tube V is further connected with one end of the ceramic capacitor C3, the other end of the ceramic capacitor C3 is connected with one end of the air capacitor C3 and one end of the transformer T, the other end of the air capacitor C3 is grounded, the other end of the transformer T is connected with the feedback high-frequency choke coil L5, the other end of the feedback high-frequency choke coil L5 is connected with the feedback bypass capacitor C6, one end of the feedback high-frequency choke coil L5 and one end of the feedback bypass capacitor C6 are further connected with one end of the gate leakage resistor R, the other end of the feedback bypass capacitor C6 is grounded, one end of the transformer T is grounded, and one end of the transformer T is connected with the air capacitor C3 in parallel.
In order to facilitate understanding of the technical scheme of the circuit control module 5, the working principle of the circuit control module is briefly described, and the parallel resonant circuit consists of a capacitor C3 and a transformer T input port, namely an anode resonant tank circuit, and is a lumped parameter circuit equivalent to a parameter distributed resonant cavity structure in the invention. The output port of the transformer is connected with the non-grounded end of the load capacitor C040. The anode a of the vacuum electron tube 16V is connected to the positive electrode of the high voltage rectifying portion through an anode choke 17L 1; one end of the cathode K is connected with the anode of the filament power supply through the filament choke coil 10, and the other end of the cathode K is directly grounded or grounded through a capacitor; the grid G is connected with the grid blocking capacitor C4 in series and grounded through a branch behind the grid feedback inductor L2, the other branch is grounded through the high-frequency choke coil L3, the grid bypass capacitor C5 and the grid leakage resistor R, and a line is led out between the inductor L3 and the resistor R and connected to the output end to serve as feedback. The feedback capacitance of the oscillating circuit is constituted by the panel-to-gate capacitance Cag of the vacuum tube 16V. A direct current blocking capacitor C2 is arranged between the anode and the anode resonant circuit to ensure that the LC parallel resonant circuit has no direct current signal, and in the LC parallel circuit, the inductor is the inductor of the output electrode of the resonant tank and forms a coupling transformer with the inductor of the output coupling polar plate 19, so that the energy generated by resonance can be transmitted to the load output part, and the resonance and the output end are electrically isolated. Therefore, in the working process of the radio frequency insecticidal and bactericidal device, the change of the load capacitor C040 (caused by the change of the dielectric constant xi of the processed materials) hardly affects the resonant frequency of the radio frequency generator, and the working frequency stability of the device is high.
The outer casing 8 is shown in fig. 4 and 5 in a preset position, the resonant cavity inner cylinder 26 is arranged inside the outer casing 8, the resonant cavity high-voltage capacitor 27 is arranged inside the resonant cavity inner cylinder 26, the vacuum tube 31 anode connecting plate 28 and the vacuum electron tube 16 anode connecting bottom plate 29 are connected together, the vacuum tube 31 anode connecting plate 28 and the vacuum electron tube 16 anode connecting bottom plate 29 are arranged inside the resonant cavity inner cylinder 26, the insulating support 33 is arranged inside the resonant cavity inner cylinder 26, the vacuum tube 31 is arranged on the insulating support 33, the output transition electrode 24 is connected with the output coupling pole plate 36, and the two output transition electrodes 24 pass through the resonant cavity inner cylinder 26 to form two loop outputs.
The vacuum electron tube 16 is a resonator inner tube 26 located in the central portion of the entire high-frequency resonator 6, and is isolated from the resonator inner tube 26 by a closing plate 30 and fixed by screws. Also mounted within the resonator inner barrel 26 are two resonator high voltage capacitors 27, shown in parallel as anode blocking capacitors C2 in fig. 2, which are connected at one end to the vacuum tube 31 anode connection plate 28 and at the other end to the resonator output plate 14. The anode connection base plate 29 of the vacuum tube 31 is connected to the anode choke 17 of fig. 3, and is connected to the lower chamber for connection to a high voltage power supply, since the connection wires at higher voltage levels are insulated by being supported by the insulating support 13. The output coupling polar plate 19 is fixed by an output pole mounting base 20, and the position of the output coupling polar plate can move up and down to match the load, so that the whole device is adjusted to achieve the maximum power output. The radio frequency output extends out from the bottom edge of the box body through an output transition electrode 24, passes through an output soft copper foil and is connected with an upper electrode plate of a load capacitor C040, and a lower electrode plate of the load capacitor C040 is connected with a metal shell 8 of the box body. The metal casing 8 of the box body is grounded, and the casing 8 of the whole box body is used as a conductor part of the resonant cavity type generator and is also used as a grounding end, so that a good shielding effect is achieved on high-frequency radiation, the manufacturing cost is reduced, and the high-frequency radiation is greatly prevented.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.
Claims (10)
1. The symmetrical dual-output radio frequency resonance generator is characterized by comprising a power supply unit, a high-voltage rectifying unit, a radio frequency resonance generator unit, a load output module and a circuit control module, wherein the high-voltage rectifying unit is connected with the power supply unit, the radio frequency resonance generator unit is connected with the high-voltage rectifying unit, the load output module is connected with the radio frequency resonance generator unit, and the circuit control module is connected with the load output module and the high-voltage rectifying unit at one end.
2. The symmetric dual-output rf resonance generator according to claim 1, wherein: the radio frequency resonance generator unit comprises a box body, the box body is designed to be of a fully-closed box body structure, a resonance circuit control unit is arranged in the box body, the resonance circuit control unit comprises a shell, a perforated capacitor arranged on the shell, a filament choke coil connected with the perforated capacitor, a resonance cavity output polar plate connected with the filament choke coil, a grid feedback regulation inductor arranged in the shell, a grid high-frequency choke coil connected with the grid feedback regulation inductor, an insulating support connected with the grid high-frequency choke coil, an insulating plate, a resonance regulation capacitor polar plate arranged in the shell, a vacuum electron tube arranged in the shell, and an anode choke coil arranged in the shell, the output electrode plate connection transition plate is arranged on the anode choke coil, the output electrode mounting base is arranged on the shell, the output electrode plates are arranged in the shell and positioned on two sides of the output electrode mounting base, the load capacitor electrode plate is arranged at one end of the output electrode mounting base, and the output electrode arranged at the other end of the output electrode mounting base is connected with the soft copper foil;
the shell is divided into a vacuum pipe box and a high-frequency resonance cavity; the vacuum pipe box is positioned in the high-frequency resonant cavity;
the anode choke coil and the output pole plate are connected with the transition plate, the output coupling pole plate and the load capacitor pole plate and are arranged inside the vacuum tube box.
3. The symmetric dual-output rf resonance generator according to claim 2, wherein: in the high-frequency resonant cavity, the resonant output polar plate is reversely buckled on the vacuum tube box and is fixed with the top of the vacuum tube box by screws, and gaps exist between the outer surface of the resonant output polar plate, the inner surface of the shell and the high-frequency resonant cavity to form an air capacitor;
meanwhile, the inductance of the resonance output polar plate forms the main inductance of the resonance circuit; the main inductor and the air capacitor are connected in parallel to form a main loop which is distributed to form a resonant circuit and is used for vacuum electron tube radio frequency oscillation.
4. The symmetric dual-output rf resonance generator according to claim 1, wherein: the resonant cavity output polar plate inductor is coupled with the output coupling polar plate inductor to form a coupling transformer form, so that electric energy feeding is realized; the output coupling polar plate extends out from the bottom edge of the box body through the output transition polar plate and the output soft copper foil and is connected with the load capacitor.
5. The symmetric dual-output RF resonance generator according to claim 4, wherein: the output coupling polar plate is supported by the insulating base, one end of the output coupling polar plate is used for feeding radio frequency power to the radio frequency insecticidal sterilization system, and the other end of the output coupling polar plate is wound out from the bottom of the box body to the upper part of the box body and returns to the grid of the vacuum tube to be used as feedback.
6. The symmetric dual-output rf resonance generator according to claim 3, wherein: the position of the output coupling polar plate can move up and down to carry out load matching;
the resonance adjusting capacitor plate can be finely adjusted up and down.
7. The symmetric dual-output rf resonance generator according to claim 2, wherein: the shell of the box body is grounded; the entire metal housing serves both as a conductor part of the resonator generator and as a ground.
8. The symmetric dual-output rf resonance generator according to claim 2, wherein: the outer side of the shell is also provided with a forced air cooling device for cooling the triode vacuum tube;
the circuit control module comprises an anode bypass capacitor C1, a ceramic capacitor C3, an air capacitor C3 and a grid blocking capacitor C4 which are C4 of a grid bypass capacitor, a grid bypass capacitor C5, a feedback bypass capacitor C6, a cathode bypass capacitor C7, a load capacitor C0, a transformer T, a vacuum tube V, a grid leakage resistor R, an anode choke coil L1, a grid feedback adjusting inductor L2, a grid high-frequency choke coil L3, a filament choke coil L4 and a feedback high-frequency choke coil L5;
wherein one end of the anode bypass capacitor C1 is connected to one end of the anode choke coil L1, the other end of the anode bypass capacitor C1 is connected to the negative electrode of the power supply, the other end of the anode choke coil L1 is connected to the anode of the vacuum electron tube V, one end of the cathode of the vacuum electron tube V is connected to one end of the cathode bypass capacitor C7, the other end of the cathode of the vacuum electron tube V is connected to the filament choke coil L4, the other end of the cathode bypass capacitor C7 is connected to the filament power supply, the other end of the filament choke coil L4 is connected to the filament power supply, the gate of the vacuum electron tube V is connected to one end of the gate feedback adjusting inductor L2, and the other end of the gate feedback adjusting inductor L2 is connected to one ends of the gate blocking capacitor C4 and the gate choke high frequency coil L3, the other end of the gate blocking capacitor C4 is grounded, the other end of the gate high-frequency choke coil L3 is connected with one end of the gate bypass capacitor C5 and one end of the gate leakage resistor R, the other end of the gate bypass capacitor C5 is grounded, the other end of the gate leakage resistor R is grounded, the anode of the vacuum electron tube V is further connected with one end of the ceramic capacitor C3, the other end of the ceramic capacitor C3 is connected with one end of the air capacitor C3 and one end of the transformer T, the other end of the air capacitor C3 is grounded, the other end of the transformer T is connected with the feedback high-frequency choke coil L5, the other end of the feedback high-frequency choke coil L5 is connected with the feedback bypass capacitor C6, one end of the feedback high-frequency choke coil L5 and one end of the feedback bypass capacitor C6 are further connected with one end of the gate leakage resistor R, the other end of the feedback bypass capacitor C6 is grounded, one end of the transformer T is grounded, and one end of the transformer T is connected with the air capacitor C3 in parallel.
9. The symmetric dual-output rf resonance generator according to claim 2, wherein: the box body is designed to be a totally enclosed box body structure and comprises a first cavity, a second cavity and a third cavity, and the shell of the box body is grounded;
the filament choke coil, the grid feedback adjusting inductor and the grid high-frequency choke coil are arranged in the first cavity;
one end of the filament choke coil is led in from the outside through a perforated capacitor, and the other end of the filament choke coil is connected to a cathode K of the vacuum electron tube.
10. The symmetric dual-output rf resonance generator according to claim 1, wherein: the radio frequency resonance generator unit further comprises an output transition pole connected with the output pole plate, an output pole connection transition plate connected with the output transition pole connection plate, and an output coupling pole plate connected with the output pole connection transition plate, wherein the end part of the output coupling pole plate is connected with the output pole mounting base.
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| CN202110117161.9A CN112953452A (en) | 2021-01-28 | 2021-01-28 | Symmetric double-output radio frequency resonance generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113839682A (en) * | 2021-09-26 | 2021-12-24 | 哈工大机器人（合肥）国际创新研究院 | Miniaturized multipurpose radio frequency resonance generating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921745A (en) * | 2019-04-02 | 2019-06-21 | 无锡旭洲智能科技有限公司 | Side output type radio frequency resonant generator and pesticide-germicide device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109921745A (en) * | 2019-04-02 | 2019-06-21 | 无锡旭洲智能科技有限公司 | Side output type radio frequency resonant generator and pesticide-germicide device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839682A (en) * | 2021-09-26 | 2021-12-24 | 哈工大机器人（合肥）国际创新研究院 | Miniaturized multipurpose radio frequency resonance generating device |
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Application publication date: 20210611 |