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WO2018161745A1 - 低频交变电场发生装置及系统、信号调节方法 - Google Patents

低频交变电场发生装置及系统、信号调节方法 Download PDF

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Publication number
WO2018161745A1
WO2018161745A1 PCT/CN2018/074823 CN2018074823W WO2018161745A1 WO 2018161745 A1 WO2018161745 A1 WO 2018161745A1 CN 2018074823 W CN2018074823 W CN 2018074823W WO 2018161745 A1 WO2018161745 A1 WO 2018161745A1
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WO
WIPO (PCT)
Prior art keywords
low frequency
electric field
control module
transformer
alternating electric
Prior art date
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PCT/CN2018/074823
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English (en)
French (fr)
Inventor
余铭
Original Assignee
浙江驰力科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江驰力科技股份有限公司 filed Critical 浙江驰力科技股份有限公司
Priority to AU2018229897A priority Critical patent/AU2018229897B2/en
Priority to US16/309,103 priority patent/US11684075B2/en
Priority to EP18763255.9A priority patent/EP3595156A4/en
Publication of WO2018161745A1 publication Critical patent/WO2018161745A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
    • H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
    • H02M5/44—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
    • H02M5/453—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/003—Control or safety devices for sterilisation or pasteurisation systems
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/60—Preservation of foods or foodstuffs, in general by treatment with electric currents without heating effect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC
    • H02M5/04—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
    • H02M5/10—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers
    • H02M5/16—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers for conversion of frequency
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings

Definitions

  • the present invention relates to the field of biomass preservation equipment, and in particular to a low frequency alternating electric field generating device and system, and a signal adjustment method.
  • the biomass can be placed in a container made of a conductive material, and the container can be placed on a metal stand on which an electrostatic power source is turned on to obtain a freshness preservation effect.
  • the high voltage required for the technology it is necessary to have excellent insulation performance for the fresh-keeping rack and the storage and fresh-keeping facilities to ensure the safety of use, which leads to high production cost and high maintenance cost of the technology.
  • a high-voltage electrostatic field can be formed between the two positive and negative electrode plates placed to preserve the biomass placed between the two poles.
  • this technology also faces the cost and safety issues of its insulation facilities under high voltage operating conditions.
  • the cell membrane of the raw material tissue of the preserved biomass at high voltage is easily broken down by high voltage, and after the release of the fresh-keeping treatment, the spoilage is accelerated.
  • an embodiment of the present invention provides a low frequency alternating electric field generating device, where the low frequency alternating electric field generating device includes: an input control module, a transformer, an output control module, and a discharging module; and an input end configuration of the input control module Coupling with an external AC power source, the input control module is coupled to a primary side winding of the transformer, one end of the secondary winding of the transformer is coupled to the output control module, the output control module and the discharge module Coupling, the other end of the secondary winding of the transformer is coupled to a ground potential.
  • the input control module is configured to acquire an alternating signal input by the external alternating current power source, generate a first low frequency signal according to the type of the fresh-keeping biomass and the alternating signal, and output the first low-frequency signal to the The primary winding of the transformer.
  • the output control module is configured to acquire a second low frequency signal output by the secondary side winding of the transformer, and adjust a current value of the second low frequency signal according to the type of the fresh-keeping biomass to adjust the adjusted
  • the second low frequency signal is output to the discharge module.
  • the discharge module is configured to generate a low frequency alternating electric field based on the received second low frequency signal.
  • the input control module includes: a rectifying unit configured to be coupled to an external AC power source, and an inverting unit coupled to an input end of the inverter unit, the inverting unit Coupling with the primary side winding of the transformer.
  • the rectifying unit is configured to rectify an alternating signal input by the external alternating current power source, and output the alternating signal to the inverter unit.
  • the inverter unit is configured to acquire an alternating signal output by the rectifying unit, and output the first low frequency signal to the first low frequency signal generated according to the type of the fresh-keeping biomass and the alternating signal
  • the primary side winding of the transformer, wherein the first low frequency signal comprises: a sine wave, a cosine wave, a square wave, a rectangular wave, a trapezoidal wave or a sawtooth wave.
  • the low frequency alternating electric field generating device further includes: a protection module respectively coupled to the other end of the secondary winding of the transformer and the ground potential.
  • the low-frequency alternating electric field has a voltage intensity of 500 volts to 5000 volts on the electrodes of the discharge module.
  • the discharge module is made of a conductive material, and the discharge module has a shape of a plate, a strip, a column or a mesh.
  • an outer surface of the discharge module is covered with an insulating material.
  • the current intensity of the second low frequency signal is 0.0001 amps to 0.15 amps.
  • an embodiment of the present invention provides a signal adjustment method, which is applied to the low frequency alternating electric field generating device, and the low frequency alternating electric field generating device includes: an input control module, a transformer, an output control module, and a discharge module; An input of the input control module is configured to be coupled to an external AC power source, the input control module is coupled to a primary side winding of the transformer, and one end of the secondary winding of the transformer is coupled to the output control module, An output control module is coupled to the discharge module, and the other end of the secondary winding of the transformer is coupled to a ground potential.
  • the method includes: the input control module acquires an alternating signal input by the external alternating current power source, and generates a first low frequency signal according to a type of fresh-keeping biomass and the alternating signal, and outputs the first low-frequency signal To the primary winding of the transformer.
  • the output control module acquires a second low frequency signal outputted by the secondary side winding of the transformer, and adjusts a current value of the second low frequency signal according to the type of the fresh-keeping biomass to adjust the second
  • the low frequency signal is output to the discharge module.
  • the discharge module generates a low frequency alternating electric field according to the received second low frequency signal.
  • the input control module includes: a rectifying unit configured to be coupled to an external AC power source, and an inverting unit coupled to an input end of the inverter unit, the inverting unit Coupling with the primary side winding of the transformer.
  • the method further includes the rectifying unit configured to rectify the alternating signal input by the external alternating current power source and output the alternating signal to the inverter unit.
  • the inverter unit is configured to acquire an alternating signal output by the rectifying unit, and output the first low frequency signal to the first low frequency signal generated according to the type of the fresh-keeping biomass and the alternating signal
  • the primary side winding of the transformer, wherein the first low frequency signal comprises: a sine wave, a cosine wave, a square wave, a rectangular wave, a trapezoidal wave or a sawtooth wave.
  • an embodiment of the present invention provides a low frequency alternating electric field generating system, where the low frequency alternating electric field generating system includes: a controller and the low frequency alternating electric field generating device, wherein the controller and the low frequency alternating The electric field generating device is coupled.
  • the input control module can acquire an alternating signal of the external AC power input, and generate a first low frequency signal corresponding to the type of the fresh-keeping biomass according to the type of the fresh-keeping biomass and the acquired alternating signal, and then output the first low-frequency signal.
  • the transformer outputs a second low frequency signal from the secondary side winding according to the first low frequency signal of the primary side winding through the electromagnetic coupling relationship between the primary side winding and the secondary side winding.
  • the output control module can acquire the second low frequency signal outputted by the secondary winding of the transformer, and adjust the current value of the second low frequency signal according to the type of the fresh-keeping biomass to adjust the second low frequency corresponding to the type of the fresh-keeping biomass.
  • the signal is output to the discharge module.
  • the discharge module is capable of discharging to generate a low frequency alternating electric field by receiving the second low frequency signal.
  • the low-frequency alternating electric field can cause the water molecules in the fresh-keeping biomass to swing at the same frequency, thereby effectively suppressing biochemical reactions and physiological metabolism inside the fresh-keeping biomass. Therefore, it can play a good role in preserving the fresh-keeping biomass.
  • the characteristics of the low-frequency alternating electric field can correspond to the type of fresh-keeping biomass, the low-frequency alternating electric field can provide a better preservation effect on the fresh-keeping biomass.
  • FIG. 1 is a structural block diagram of a low frequency alternating electric field generating system according to an embodiment of the present invention
  • FIG. 2 is a block diagram showing a first structure of a low frequency alternating electric field generating device according to an embodiment of the present invention
  • FIG. 3 is a block diagram showing a second structure of a low frequency alternating electric field generating device according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a first application environment of a low frequency alternating electric field generating device according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing a second application environment of a low frequency alternating electric field generating device according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a signal adjustment method according to an embodiment of the present invention.
  • FIG. 7 is a sub-flow diagram of step S120 in a signal adjustment method according to an embodiment of the present invention.
  • Icon 200-low frequency alternating electric field generating system; 210-controller; 100-low frequency alternating electric field generating device; 110-input control module; 111-rectifying unit; 112-inverter unit; 120-protection module; 130-output Control module; 140-discharge module.
  • connection and “coupled” are to be understood broadly, and may be, for example, a fixed connection or a detachable connection, or Connected integrally; can be mechanical or electrical; can be directly connected or indirectly connected through an intermediate medium, which can be the internal communication between the two components.
  • intermediate medium which can be the internal communication between the two components.
  • an embodiment of the present invention provides a low frequency alternating electric field generating system 200 .
  • the low frequency alternating electric field generating system 200 includes a controller 210 and a low frequency alternating electric field generating device 100 .
  • Controller 210 can be an integrated circuit chip that has signal processing capabilities.
  • the controller 210 may be a general-purpose processor, including a central processing unit (CPU), a network processor (Network Processor, NP for short), and the like; or a digital signal processor (DSP), an application specific integrated circuit. (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the controller 210 itself may have a certain data storage capability to store the operational data required for the various types of fresh-keeping biomass of the low-frequency alternating electric field generating system 200 during freshness preservation.
  • the controller 210 can set an input unit such as a knob, a button, or a touch screen.
  • the controller 210 can be coupled to the low frequency alternating electric field generating device via a data bus, such as a 232 bus, a 485 bus, or a Controller Area Network (Can).
  • a data bus such as a 232 bus, a 485 bus, or a Controller Area Network (Can).
  • the operator inputs an operation instruction corresponding to the type of fresh-keeping biomass by inputting a knob, a button, or a touch screen or the like on the controller 210 according to the type of the fresh-keeping biomass to be used, wherein the fresh-keeping biomass may include: Food, agricultural products and biological source materials.
  • the controller 210 can select the operation data corresponding to the operation instruction.
  • the controller 210 then generates a corresponding control command according to the operation data, and outputs the data to the low-frequency alternating electric field generating device 100 through the data bus to control the operation of the low-frequency alternating electric field generating device 100 by the control command.
  • the low frequency alternating electric field generating device 100 can obtain an alternating signal of an external alternating current power source by coupling with an external alternating current power source, wherein the external alternating current power source can be a 220V alternating current power source.
  • the alternating signal input from the external AC power source is rectified, inverted, and boosted (bucked) to generate a low frequency alternating electric field.
  • the low frequency alternating electric field generating device 100 is also coupled to the controller 210 via a data bus to receive control commands input by the controller 210.
  • the low-frequency alternating electric field generating device 100 can adjust the current and frequency of the alternating signal according to the control command, so as to generate a low-frequency alternating electric field corresponding to the type of fresh-keeping biomass, thereby enabling different types of fresh-keeping biomass to be exchanged at low frequencies.
  • the electric field generating device 100 achieves an optimum freshness preservation effect.
  • an embodiment of the present invention provides a low frequency alternating electric field generating device 100.
  • the low frequency alternating electric field generating device 100 includes an input control module 110, a transformer T1, a protection module 120, an output control module 130, and a discharge module. 140.
  • the input control module 110 is configured to acquire an alternating signal input from an external alternating current power source, and generate a first low frequency signal according to the type of the fresh-keeping biomass and the alternating signal, and output the first low-frequency signal to the primary side winding aa' of the transformer T1.
  • the operator can set a control unit corresponding to the type of the fresh-keeping biomass through the input control unit of the input control module 110, such as a knob, a button, or a touch screen, so that the input control module 110 according to the control command and the alternating The signal generates a first low frequency signal.
  • the transformer T1 is configured to boost (step down) the first low frequency signal input to the primary side winding aa' through its electromagnetic coupling relationship between the primary side winding aa' and the secondary side winding bb', and the secondary side winding thereof Bb' is output to the output control module 130.
  • the protection module 120 is configured to ensure normal operation of the low frequency alternating electric field generating device 100 by grounding and to form overcurrent or overvoltage protection for the low frequency alternating electric field generating device 100.
  • the protection module 120 can be a protection resistor or a protection capacitor.
  • the output control module 130 is configured to acquire a second low frequency signal output by the secondary side winding bb' of the transformer T1, and adjust a current value of the second low frequency signal according to the type of the fresh-keeping biomass to output the adjusted second low-frequency signal to Discharge module 140.
  • the operator may also input a control unit such as a knob, a button or a touch screen by the output control module 130, and input a control instruction corresponding to the type of the fresh-keeping biomass, so that the input control module 110 adjusts the first according to the control command.
  • the current value of the two low frequency signals is configured to acquire a second low frequency signal output by the secondary side winding bb' of the transformer T1, and adjust a current value of the second low frequency signal according to the type of the fresh-keeping biomass to output the adjusted second low-frequency signal to Discharge module 140.
  • the operator may also input a control unit such as a knob, a button or a touch screen by the output control module 130, and input a control instruction corresponding to the type of the
  • the discharge module 140 is configured to generate a low frequency alternating electric field based on the received second low frequency signal.
  • the input control module 110 includes: a rectifying unit 111 and an inverting unit 112.
  • the rectifying unit 111 is configured to rectify the alternating signal input from the external alternating current power source, and output the rectified alternating signal to the inverter unit 112.
  • the rectifying unit 111 may be a half wave rectifying circuit or a full wave rectifying circuit, wherein the full wave rectifying circuit may be a bridge type rectifying circuit composed of a plurality of diodes. It can be understood that the type of the rectifying circuit in the rectifying unit 111 can be determined according to the actual implementation, which is not limited herein.
  • the rectifying unit 111 is coupled to the external AC power source through the power line to obtain an alternating signal of the external AC power input AC.
  • the rectifying unit 111 rectifies the AC alternating signal into a DC alternating signal or a partial waveform pulsating alternating signal according to its own rectifier circuit.
  • the rectifying unit 111 is also coupled to the inverter unit 112 through a power supply line to output the rectified alternating signal to the inverter unit 112.
  • the inverter unit 112 is configured to acquire an alternating signal output from the rectifying unit 111, and output the first low frequency signal to the primary side winding aa' of the transformer T1 according to the type of the fresh-keeping biomass and the first low-frequency signal generated by the alternating signal.
  • the inverter unit 112 may include: an inverter bridge circuit, a control logic circuit, and a filter circuit.
  • the inverter bridge circuit can be coupled to the rectifying unit 111 and the filter circuit respectively through the power line, and the control logic circuit couples the inverter bridge circuit through the power line to control the inverter bridge circuit, and the filter circuit passes through the power line coupling transformer.
  • an input unit such as a knob, a button, or a touch screen may be disposed on the inverter unit 112.
  • the inverter unit 112 is coupled to the rectifying unit 111 through the power supply line, so that the alternating signal input from the rectifying unit 111 can be acquired.
  • the alternating bridge signal is inverted by its inverter bridge circuit into a first low frequency signal of the alternating current.
  • the operator can input a control unit corresponding to the type of fresh-keeping biomass to the control logic circuit by controlling an input unit such as a knob, a button, or a touch screen on the inverter unit 112.
  • the control logic circuit can also receive the control command input by the controller by coupling the controller.
  • the manner of controlling the control command acquired by the logic circuit may also be determined according to the actual implementation, and is not limited herein.
  • the control logic circuit can correspondingly control the inverter bridge circuit according to the acquired control command.
  • the waveform of the first low frequency signal generated by the inverter bridge circuit inversion includes: a sine wave, a cosine wave, a square wave, a rectangular wave, a trapezoidal wave or a sawtooth wave, and the first low frequency The frequency of the signal is from 1HZ to 300kHZ.
  • the inverter unit 112 filters the first low frequency signal through its filter circuit to filter out the interference signal in the first low frequency signal, and then couples the first line winding aa' of the transformer T1 through the power line.
  • the low frequency signal is output to the primary side winding aa' of the transformer T1.
  • the primary side winding aa' of the transformer T1 is coupled to the inverter unit 112 through a power supply line so that its primary side winding aa' can acquire the first low frequency signal.
  • the transformer T1 passes the electromagnetic coupling relationship between the primary side winding aa' and the secondary side winding bb', so that the first low frequency signal input to the primary side winding aa' can be boosted (stepped down) by the secondary side winding bb' thereof.
  • a second low frequency signal is generated.
  • the second low frequency signal is generated after the secondary side winding bb' is boosted.
  • the transformer T1 is a variable transformer T1.
  • the operator can adjust the ratio of the transformer T1, thereby adjusting the voltage amplitude of the second low frequency signal.
  • the voltage range of the second low frequency signal is: 500V-5000V.
  • the operator can also adjust the ratio of the transformer T1 so that the voltage generated by the transformer T1 to generate the second low frequency signal can be adapted to the type of fresh-keeping biomass.
  • One end of the protection module 120 is coupled to one end of the secondary winding bb' of the transformer T1 through a power supply line, and the other end of the protection module 120 is grounded.
  • the grounding of the other end of the protection module 120 can ensure that the circuit forms a closed loop to ensure that the low frequency alternating electric field generating device 100 can generate a low frequency alternating electric field.
  • the other end of the protection module 120 is grounded to form a closed loop through coupling with the ground end, and the other end of the protection module 120 is grounded to form a closed loop through coupling with the ground line, and the grounding manner can be according to the environmental requirements of the actual application. The choice is made without specific limitation.
  • the protection module 120 may include a protection resistor or a protection capacitor, and the resistance of the resistor or the capacity of the capacitor may be determined according to actual implementation.
  • the protection module 120 can effectively share and withstand the output power of the low-frequency alternating electric field generating device 100 at this time, so as to avoid damage to other modules.
  • the output control module 130 is capable of effectively controlling and regulating the output power output to the discharge module 140.
  • the output control module 130 can also be coupled to the other end of the secondary side winding bb' of the transformer T1 via a power supply line to obtain a second low frequency signal outputted by the secondary side winding bb' of the transformer T1.
  • the output control module 130 can also set an input unit such as a knob, a button, or a touch screen.
  • the operator can control the input unit corresponding to the fresh-keeping biomass type to the output control module 130 by controlling the input unit of the knob, the button or the touch screen on the output control module 130, and the output control module 130 is also It can receive control commands from the controller input.
  • the manner of the control command acquired by the output control module 130 may also be determined according to the actual implementation, and is not limited herein.
  • the output control module 130 can adjust the current magnitude of the acquired second low frequency signal according to the control command, thereby adjusting the output power output to the discharge module 140.
  • the current control range of the output control module 130 for the second low frequency signal is: 0.0001A to 0.15A.
  • the output control module 130 is also coupled to the discharge module 140 via a power line to output a second low frequency signal to the discharge module 140.
  • the discharge module 140 is coupled to the output control module 130 via a power source to generate a low frequency alternating electric field based on the received second low frequency signal.
  • the discharge module 140 can be an electrode plate.
  • the outer surface of the discharge module 140 is covered with an insulating material. After the second low frequency signal is acquired, the discharge module 140 can continuously induce an alternating low frequency alternating electric field in the working environment space according to the second low frequency signal.
  • the shape of the discharge module 140 may be: a plate shape, a strip shape, a column shape or a mesh shape, and the specific shape thereof may be determined according to the actual application site environment, and is not limited herein.
  • the discharge module 140 may also be multiple, and each of the discharge modules 140 is coupled through the power line and the output control module 130 to form a plurality of discharge modules 140 in parallel. After the parallel connection of the plurality of discharge modules 140, the fresh-keeping effect of the low-frequency alternating electric field generating device 100 on the fresh-keeping biomass can be effectively improved.
  • the distance between the discharge module 140 and the ground end of the low-frequency alternating electric field generating device 100 is relatively long, so that the attenuation of the electric field is weak in a short distance, and the fresh-keeping biomass placed in the low-frequency alternating electric field can be made different. Both have good preservation effect.
  • the output control module 130 adjusts the current intensity of the second low frequency signal, the intensity of the voltage output by the discharge module 140 on the discharge plate thereof may be 500 volts to 5000 volts.
  • FIG. 4 and FIG. 5 illustrate the practical application of the low frequency alternating electric field generating device 100.
  • a in FIG. 4 and FIG. 5 is a cabinet for installing the low-frequency alternating electric field generating device 100, which may be: a refrigerating storage warehouse, a refrigerating truck, a semi-finished product warehouse of a food processing factory, a refrigerator, a refrigerator, or a fresh display cabinet of a shopping mall.
  • B in the figure is the ground end of the low frequency alternating electric field generating device 100.
  • C in Figs. 4 and 5 is a shelf C placed in the cabinet A
  • D in Figs. 4 and 5 is a fresh-keeping article placed on the shelf C.
  • the electrodes of the discharge module 140 in FIG. 4 are one according to the actual installation and use environment, and the electrodes of the discharge module 140 in FIG. 5 are plural.
  • the low-frequency alternating electric field generating device 100 is installed in a semi-finished warehouse of a refrigerating storage warehouse, a refrigerating truck or a food processing factory, the preservation of various foods or food semi-finished products can be realized.
  • the perishable rotten leaves and fruits such as cabbage, lettuce, onion, garlic, coriander, strawberry or cherry stored in the refrigerator and the refrigerating storage cabinet can be extended to a shelf life of 5 -7 days or longer preservation time, and it can also ensure that the color, moisture and hardness of the dishes are kept good, and the difference from fresh vegetables and fruits is small.
  • the low-frequency alternating electric field generating device 100 is installed in the fresh display cabinet of the shopping mall, it can prolong the freshness of the fresh products such as fresh meat or fish and shrimp in the display cabinet by more than 2 times, and at the same time It inhibits the microbial growth of fresh products and can suppress the generation of odor in the display cabinet.
  • the strawberry When the strawberry is stored by conventional storage means, its shelf life at room temperature (20-25 ° C) is usually 2 days. However, when the strawberry is placed in the low-frequency alternating electric field generated by the low-frequency alternating electric field generating device 100, and the potential at the strawberry placement position is 50 V, the strawberry can be extended for 5-7 days under the normal temperature. If the strawberry is stored at a normal low temperature (0-4 ° C), the shelf life is only 3-4 days. However, in the low-temperature environment of 0-4 ° C, the strawberry is placed in a low-frequency alternating electric field, and the strawberry is placed at a potential of 50 V in the low-frequency alternating electric field generating device 100, and the preservation time of the strawberry is extended to about 2 weeks. And the fruit rate of strawberries can be kept above 96%.
  • the coriander When the coriander is stored by conventional storage means, it has a low-temperature preservation period of about 2 days below 10 °C. However, if the parsley is placed in a low-frequency alternating electric field generated by the low-frequency alternating electric field generating device 100 having an ambient temperature of 0-10 ° C, and the potential at the place where the parsley is placed is 50 V, the preservation time of the coriander is extended to about 7 days. And in the low-frequency alternating electric field generating device 100, the coriander color is green, the water is full, and there is no rot and no yellow leaves in the preservation period.
  • the captured tilapia When using conventional storage methods, the captured tilapia needs to be stored at 0 ° C and iced, and the fresh-keeping period is within 48 hours, otherwise it will spoil and deteriorate and cannot be eaten. However, if it is placed in a low-frequency alternating electric field generated by the low-frequency alternating electric field generating device 100 having an ambient temperature of 0-4 ° C, and the potential at the tilapia placement position is 200 V, the shelf life can be as long as 7 -10 days.
  • the tilapia has a bright surface and no odor during the fresh-keeping period, and the total number of microbial colonies does not change greatly, and is maintained in a range between 2.4 ⁇ 10 2 and 7.8 ⁇ 10 3 .
  • an embodiment of the present invention further provides a signal adjustment method applied to a low frequency alternating electric field generating device.
  • the signal adjustment method includes: step S110, step S120, and step S130.
  • Step S110 The input control module acquires an alternating signal input by the external alternating current power source, and generates a first low frequency signal according to the type of the fresh-keeping biomass and the alternating signal, and outputs the first low-frequency signal to the The primary winding of the transformer.
  • Step S120 The output control module acquires a second low frequency signal outputted by the secondary side winding of the transformer, and adjusts a current value of the second low frequency signal according to the type of the fresh-keeping biomass to adjust the adjusted The second low frequency signal is output to the discharge module.
  • Step S130 The discharge module generates a low frequency alternating electric field according to the received second low frequency signal.
  • step S120 in the signal adjustment method further includes: step S121 and step S122.
  • Step S121 The rectifying unit rectifies the alternating signal input by the external alternating current power source, and outputs the alternating signal to the inverter unit.
  • Step S122 The inverter unit acquires an alternating signal output by the rectifying unit, and outputs the first low frequency signal to the first low frequency signal generated according to the type of the fresh-keeping biomass and the alternating signal.
  • the primary side winding of the transformer, wherein the first low frequency signal comprises: a sine wave, a cosine wave, a square wave, a rectangular wave, a trapezoidal wave or a sawtooth wave.
  • the embodiment of the present invention provides a low frequency alternating electric field generating device 100, a signal adjusting method, and a low frequency alternating electric field generating system 200.
  • the low frequency alternating electric field generating device 100 includes an input control module 110, a transformer T1, an output control module 130, and a discharging module 140.
  • the input end of the input control module 110 is configured to be coupled to an external AC power source, the input control module 110 is coupled to the primary side winding aa' of the transformer T1, and one end of the secondary side winding bb' of the transformer T1 is coupled to the output control module 130, and the output is controlled.
  • the module 130 is coupled to the discharge module 140, and the other end of the secondary winding bb' of the transformer T1 is coupled to the ground potential.
  • the input control module 110 can acquire an alternating signal of the external alternating current power input, and generate a first low frequency signal corresponding to the type of the fresh-keeping biomass according to the type of the fresh-keeping biomass and the acquired alternating signal, and then the first low-frequency signal. Output to the primary side winding aa' of the transformer T1.
  • the transformer T1 outputs a second low frequency signal from the secondary side winding bb' according to the first low frequency signal of the primary side winding aa' by its own electromagnetic coupling relationship between the primary side winding aa' and the secondary side winding bb'.
  • the output control module 130 can acquire the second low frequency signal outputted by the secondary side winding bb' of the transformer T1, and also adjust the current value of the second low frequency signal according to the type of the fresh-keeping biomass to correspond to the type of the preserved biomass.
  • the second low frequency signal is output to the discharge module 140.
  • the discharge module 140 is capable of discharging to generate a low frequency alternating electric field by receiving the second low frequency signal.
  • the low-frequency alternating electric field can cause the water molecules in the fresh-keeping biomass to swing at the same frequency, thereby effectively suppressing biochemical reactions and physiological metabolism inside the fresh-keeping biomass. Therefore, it can play a good role in preserving fresh-keeping biomass.
  • the characteristics of the low-frequency alternating electric field can correspond to the type of fresh-keeping biomass, the low-frequency alternating electric field can provide a better preservation effect on the fresh-keeping biomass.

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Abstract

一种低频交变电场发生装置（100）及系统（200）、以及信号调节方法，属于生物质保鲜设备领域。低频交变电场发生装置包括：输入控制模块（110）、变压器（T1）、输出控制模块（130）和放电模块（140）。输入控制模块输入端配置成与外部交流电源耦合，输入控制模块与变压器的一次侧绕组耦合，变压器的二次侧绕组一端与输出控制模块耦合，输出控制模块与放电模块耦合，变压器二次侧绕组另一端与地电位耦合。低频交变电场发生装置产生的低频交变电场使得保鲜生物质置内的水分子产生同频率摆动，抑制保鲜生物质内部的生物化学反应及生理代谢，起到保鲜作用。且该低频交变电场的特质能够对应需保鲜生物质的种类，因此能够对保鲜生物质起到较佳的保鲜效果。

Description

低频交变电场发生装置及系统、信号调节方法
相关申请的交叉引用
本申请要求于2017年03月08日提交中国专利局的申请号为2017101354098、名称为“低频交变电场发生装置及系统、信号调节方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及生物质保鲜设备领域，具体而言，涉及一种低频交变电场发生装置及系统、以及信号调节方法。
背景技术
随着科学技术的发展和提高，电力技术已经应用到生物质保鲜领域中。食品或农产品通静电或放置在静电场中后，能够获得更好的保鲜效果。
在现有技术中，可将生物质盛放在由导电材料制成的容器中，并将该容器放置在接通静电电源的金属台架上，以获取保鲜效果。但由于该技术需使用高电压，因而需要保鲜台架和贮藏保鲜设施均具备优异的绝缘性能，以保证其使用安全，进而导致该技术的生产成本及使用维护成本极高。此外，还可通过在放置的正负两个放电极板之间形成高压静电场，以对放置于两极之间的生物质起到保鲜作用。但该技术同样面临在高电压的工作状态下，其绝缘设施的成本及安全问题。同时，高电压下被保鲜生物质的原料组织细胞膜容易被高电压击穿，进而在解除保鲜处理后，会加速腐败变质。
因此，如何有效提高保鲜效果的同时，并有效减小设备的生产成本及使用维护成本是目前业界一大难题。
发明内容
有鉴于此，本发明的目的在于提供一种低频交变电场发生装置及系统、以及信号调节方法，以改善上述缺陷。
本发明的实施例是这样实现的：
第一方面，本发明实施例提供一种低频交变电场发生装置，所述低频交变电场发生装置包括：输入控制模块、变压器、输出控制模块和放电模块；所述输入控制模块的输入端配置成与外部交流电源耦合，所述输入控制模块与所述变压器的一次侧绕组耦合，所述变压器的二次侧绕组的一端与所述输出控制模块耦合，所述输出控制模块与所述放电模块耦 合，所述变压器的二次侧绕组的另一端与地电位耦合。所述输入控制模块，配置成获取由所述外部交流电源输入的交变信号，并根据保鲜生物质的种类和所述交变信号生成第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组。所述输出控制模块，配置成获取所述变压器的二次侧绕组输出的第二低频信号，并根据所述保鲜生物质的种类调节所述第二低频信号的电流值，以将调整后的所述第二低频信号输出至所述放电模块。所述放电模块配置成根据所接收的所述第二低频信号生成低频交变电场。
进一步的，所述输入控制模块包括：整流单元和逆变单元，所述整流单元配置成与外部交流电源耦合，所述整流单元还与所述逆变单元的输入端耦合，所述逆变单元与所述变压器的一次侧绕组耦合。所述整流单元，配置成将由所述外部交流电源输入的交变信号整流后，将所述交变信号输出至所述逆变单元。所述逆变单元，配置成获取所述整流单元输出的交变信号，并根据保鲜生物质的种类和所述交变信号生成的所述第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组，其中，所述第一低频信号包括：正弦波、余弦波、方波、矩形波、梯形波或锯齿波。
进一步的，所述低频交变电场发生装置还包括：保护模块，所述保护模块分别与所述变压器的二次侧绕组的另一端和所述地电位耦合。
进一步的，所述低频交变电场在所述放电模块电极上的电压强度为500伏特至5000伏特。
进一步的，所述放电模块由导电材料制成，所述放电模块的形状为：板状、条状、柱状或网状。
进一步的，所述放电模块的外表面覆盖有绝缘材料。
进一步的，所述第二低频信号的电流强度为0.0001安培至0.15安培。
第二方面，本发明实施例提供一种信号调节方法，应用于所述低频交变电场发生装置，所述低频交变电场发生装置包括：输入控制模块、变压器、输出控制模块和放电模块；所述输入控制模块的输入端配置成与外部交流电源耦合，所述输入控制模块与所述变压器的一次侧绕组耦合，所述变压器的二次侧绕组的一端与所述输出控制模块耦合，所述输出控制模块与所述放电模块耦合，所述变压器的二次侧绕组的另一端与地电位耦合。所述方法包括：所述输入控制模块获取由所述外部交流电源输入的交变信号，并根据保鲜生物质的种类和所述交变信号生成第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组。所述输出控制模块获取所述变压器的二次侧绕组输出的第二低频信号，并根据所述保鲜生物质的种类调节所述第二低频信号的电流值，以将调整后的所述第二低频信号输出至所述放电模块。所述放电模块根据所接收的所述第二低频信号生成低频交变电场。
进一步的，所述输入控制模块包括：整流单元和逆变单元，所述整流单元配置成与外 部交流电源耦合，所述整流单元还与所述逆变单元的输入端耦合，所述逆变单元与所述变压器的一次侧绕组耦合。所述方法还包括：所述整流单元，配置成将由所述外部交流电源输入的交变信号整流后，将所述交变信号输出至所述逆变单元。所述逆变单元，配置成获取所述整流单元输出的交变信号，并根据保鲜生物质的种类和所述交变信号生成的所述第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组，其中，所述第一低频信号包括：正弦波、余弦波、方波、矩形波、梯形波或锯齿波。
第三方面，本发明实施例提供一种低频交变电场发生系统，所述低频交变电场发生系统包括：控制器和所述低频交变电场发生装置，所述控制器与所述低频交变电场发生装置耦合。
本发明实施例的有益效果是：
通过输入控制模块能够获取外部交流电源输入的交变信号，并根据保鲜生物质的种类和获取的交变信号生成与保鲜生物质的种类对应的第一低频信号，再将该第一低频信号输出至变压器的一次侧绕组。变压器通过自身的一次侧绕组和二次侧绕组的电磁耦合关系，根据一次侧绕组的第一低频信号，由二次侧绕组输出第二低频信号。输出控制模块能够获取变压器的二次侧绕组输出的第二低频信号，并也根据保鲜生物质的种类调节第二低频信号的电流值，以将调整后与保鲜生物质的种类对应的第二低频信号输出至放电模块。放电模块通过根据所接收的第二低频信号，便能够放电产生低频交变电场。当保鲜生物质置于该低频交变电场中时，该低频交变电场能够使得保鲜生物质置内的水分子产生同频率的摆动，进而能够有效抑制保鲜生物质内部的生物化学反应及生理代谢，故能够对该保鲜生物质起到良好的保鲜作用。此外，又由于该低频交变电场的特质能够对应需保鲜生物质的种类，因此，该低频交变电场能够对该保鲜生物质起到较佳的保鲜效果。
本发明的其他特征和优点将在随后的说明书阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明实施例而了解。本发明的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。通过附图所示，本发明的上述及其它目的、特征和优势将更加清晰。在全部附图中相同的附图标记指示相同的部分。并未刻意按实际尺寸等比例缩放绘制附图，重点在于示出本发明的主旨。
图1示出了本发明实施例提供的一种低频交变电场发生系统的结构框图；
图2示出了本发明实施例提供的一种低频交变电场发生装置的第一结构框图；
图3示出了本发明实施例提供的一种低频交变电场发生装置的第二结构框图；
图4示出了本发明实施例提供的一种低频交变电场发生装置的第一应用环境示意图；
图5示出了本发明实施例提供的一种低频交变电场发生装置的第二应用环境示意图；
图6示出了本发明实施例提供的一种信号调节方法的流程图；
图7示出了本发明实施例提供的一种信号调节方法中步骤S120的子流程图。
图标：200-低频交变电场发生系统；210-控制器；100-低频交变电场发生装置；110-输入控制模块；111-整流单元；112-逆变单元；120-保护模块；130-输出控制模块；140-放电模块。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本发明实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本发明的实施例的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的选定实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。
在本发明的描述中，还需要说明的是，除非另有明确的规定和限定，术语“连接”、“耦合”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
请参阅图1，本发明实施例提供了一种低频交变电场发生系统200，该低频交变电场发生系统200包括：控制器210和低频交变电场发生装置100。
控制器210可以为集成电路芯片，其具有信号处理能力。其中，控制器210可以是通用处理器，包括中央处理器(Central Processing Unit，简称CPU)、网络处理器(Network Processor，简称NP)等；还可以是数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、或者分 立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
控制器210自身可具备一定的数据存储能力，以将低频交变电场发生系统200的对各种的类保鲜生物质在保鲜时，所需的运行数据均进行存储。此外，控制器210可以设置旋钮、按钮或者触控屏等输入单元。控制器210可以通过数据总线与低频交变电场发生系装置耦合，例如：232总线、485总线或控制器局域网络总线(Controller Area Network，Can)等。本实施例中，操作人员根据需保鲜生物质的种类，通过操控控制器210上的旋钮、按钮或者触控屏等输入单元输入对应保鲜生物质种类的操作指令，其中，保鲜生物质可包括：食品、农产品及生物来源材料等。控制器210根据该操作指令则能够选择对应该操作指令的运行数据。控制器210再根据该运行数据生成对应的控制指令，并通过数据总线输出至低频交变电场发生装置100，以通过该控制指令对低频交变电场发生装置100的运行进行控制。
低频交变电场发生装置100能够通过与外部交流电源耦合，获取外部交流电源输入的交变信号，其中，外部交流电源可以为220V的交流电源。再将外部交流电源输入的交变信号进行整流、逆变和升压(降压)以产生低频交变电场。低频交变电场发生装置100也通过数据总线与控制器210耦合，接收控制器210输入的控制指令。低频交变电场发生装置100能够根据该控制指令调节交变信号的电流和频率，以使产生对应保鲜生物质种类的低频交变电场，进而能够使得不同种类的保鲜生物质均能够在低频交变电场发生装置100达到最佳的保鲜效果。
请参阅图2，本发明实施例提供了一种低频交变电场发生装置100，该低频交变电场发生装置100包括：输入控制模块110、变压器T1、保护模块120、输出控制模块130和放电模块140。
输入控制模块110配置成获取由外部交流电源输入的交变信号，并根据保鲜生物质的种类和交变信号生成第一低频信号，将第一低频信号输出至变压器T1的一次侧绕组aa’。本实施例中，操作人员可通过输入控制模块110自身设置旋钮、按钮或者触控屏等输入单元，输入对应保鲜生物质的种类的控制指令，以使输入控制模块110根据该控制指令以及交变信号，生成第一低频信号。
变压器T1配置成通过其一次侧绕组aa’和二次侧绕组bb’的电磁耦合关系，将输入一次侧绕组aa’的第一低频信号进行升压(降压)后，由其二次侧绕组bb’输出至输出控制模块130。
保护模块120配置成通过接地保证低频交变电场发生装置100的正常工作，并对低频交变电场发生装置100形成过流或过压保护。其中，保护模块120可以为保护电阻或保护 电容。
输出控制模块130配置成获取变压器T1的二次侧绕组bb’输出的第二低频信号，并根据保鲜生物质的种类调节第二低频信号的电流值，以将调整后的第二低频信号输出至放电模块140。本实施例中，操作人员也可通过输出控制模块130自身设置旋钮、按钮或者触控屏等输入单元，输入对应保鲜生物质的种类的控制指令，以使输入控制模块110根据该控制指令调节第二低频信号的电流值。
放电模块140配置成根据所接收的第二低频信号生成低频交变电场。
请参阅图3，输入控制模块110包括：整流单元111和逆变单元112。
整流单元111配置成将由外部交流电源输入的交变信号整流后，将整流后的交变信号输出至逆变单元112。具体的，整流单元111可以为：半波整流电路或全波整流电路，其中，全波整流电路可以为：多个二极管构成的桥型整流电路。可以理解的，整流单元111中整流电路的类型可根据实际实施情况而定，在此不做限定。整流单元111通过电源线与外部交流电源耦合，以获取外部交流电源输入交流的交变信号。整流单元111根据自身的整流电路，将该交流的交变信号整流为直流的交变信号或滤除部分波形的脉动交变信号。整流单元111也通过电源线与逆变单元112耦合，以将整流后的交变信号输出至逆变单元112。
逆变单元112配置成获取整流单元111输出的交变信号，并根据保鲜生物质的种类和交变信号生成的第一低频信号，将第一低频信号输出至变压器T1的一次侧绕组aa’。具体的，逆变单元112可以包括：逆变桥电路、控制逻辑电路和滤波电路。逆变桥电路能够通过电源线分别与整流单元111和滤波电路耦合，控制逻辑电路则通过电源线耦合该逆变桥电路的方式，以控制该逆变桥电路，滤波电路再通过电源线耦合变压器T1的一次侧绕组aa’。此外，逆变单元112上还可以设置旋钮、按钮或者触控屏等输入单元。逆变单元112通过电源线与整流单元111耦合，故能够获取整流单元111输入的交变信号。通过其逆变桥电路，以将该交变信号逆变为交流的第一低频信号。本实施例中，操作人员可以通过操控逆变单元112上的旋钮、按钮或者触控屏等输入单元，从而输入对应保鲜生物质种类的控制指令至控制逻辑电路。此外，控制逻辑电路也可以通过耦合控制器方式，以接收控制器输入的控制指令。需要说明的是，控制逻辑电路获取的控制指令的方式也可根据实际实施情况而定，在此不做限定。控制逻辑电路根据获取的控制指令便能够对应控制逆变桥电路。通过控制逻辑电路对逆变桥电路的控制，逆变桥电路逆变生成第一低频信号的波形包括：正弦波、余弦波、方波、矩形波、梯形波或锯齿波等，且第一低频信号的频率为1HZ至300kHZ。逆变单元112再通过其滤波电路对第一低频信号进行滤波，以滤除第一低频信号中的干扰信号后，通过电源线与变压器T1的一次侧绕组aa’的耦合，再将该第一低频信号输出至变压器T1的一次侧绕组aa’。
变压器T1的一次侧绕组aa’通过电源线与逆变单元112耦合，从而其一次侧绕组aa’能够获取该第一低频信号。变压器T1通过一次侧绕组aa’和二次侧绕组bb’的电磁耦合关系，从而能够将输入一次侧绕组aa’的第一低频信号，由其二次侧绕组bb’升压(降压)后产生第二低频信号。作为一种实施方式，第二低频信号为二次侧绕组bb’升压后产生。作为另一种实施方式，变压器T1为可调变压器T1。操作人员通过调节变压器T1的一次侧绕组aa’和二次侧绕组bb’之间的耦合匝数，便能够调节变压器T1的变比，进而能够调节第二低频信号的电压幅值。其中，第二低频信号的电压范围为：500V-5000V。本实施例中，操作人员也可调节变压器T1的变比，以使变压器T1产生第二低频信号的电压能够适配需要保鲜生物质的种类。另外，由于变压器T1的一次侧绕组aa’和二次侧绕组bb’所包裹的绝缘材料，故变压器T1的一次侧绕组aa’和二次侧绕组bb’之间还能够保持10KV的电气隔离，以提高低频交变电场发生装置100的运行可靠性和安全性。变压器T1二次侧绕组bb’的一端通过电源线与保护模块120耦合，而其二次侧绕组bb’的另一端则通过电源线与输出控制模块130耦合。
保护模块120一端通过电源线与变压器T1二次侧绕组bb’的一端耦合，保护模块120的另一端则接地。保护模块120的另一端的接地能够保证电路形成闭合回路，以保证低频交变电场发生装置100能够产生低频交变电场。其中，保护模块120的另一端接地可以为通过和地端耦合形成闭合回路，而保护模块120的另一端接地也可以为通过和地线耦合形成闭合回路，其接地方式可根据实际应用的环境需求而进行选择，在此不做具体限定。本实施例中，保护模块120可以包括：保护电阻或保护电容，其电阻的阻值或电容的容量可根据实际实施情况而定。若低频交变电场发生装置100发生过流或过压时，保护模块120能够有效的分担并承受此时低频交变电场发生装置100的输出功率，以免其他模块损坏。
输出控制模块130能够有效的控制并调节输出至放电模块140的输出功率。具体的，输出控制模块130也能够通过电源线与变压器T1二次侧绕组bb’的另一端耦合，以获取变压器T1的二次侧绕组bb’输出的第二低频信号。输出控制模块130也可以设置旋钮、按钮或者触控屏等输入单元。本实施例中，操作人员可以通过操控输出控制模块130上的旋钮、按钮或者触控屏等输入单元，从而输入对应保鲜生物质种类的控制指令至输出控制模块130，此外，输出控制模块130也可以接收控制器输入的控制指令。需要说明的是，输出控制模块130获取的控制指令的方式也可根据实际实施情况而定，在此不做限定。输出控制模块130获取控制指令后，输出控制模块130能够根据该控制指令而对应调节所获取的第二低频信号的电流大小，进而调节输出至放电模块140的输出功率。作为一种实施方法，输出控制模块130对第二低频信号的电流调节范围为：0.0001A至0.15A。输出控制模块130还通过电源线与放电模块140耦合，以将第二低频信号输出至放电模块140。
放电模块140通过电源与输出控制模块130耦合，以根据所接收的第二低频信号生成低频交变电场。具体的，放电模块140可以为电极板。为保证使用的安全性，放电模块140的外表面均覆盖有绝缘材料。放电模块140在获取第二低频信号后，由于自身的放电作用，故能够根据该第二低频信号持续稳定的在工作的环境空间内诱导发生交变的低频交变电场。此外，放电模块140的形状可为：板状、条状、柱状或网状等，其具体形状可根据其实际的应用场地环境而定，在此并不限定。再者，根据实际应用环境，放电模块140还可以为多个，每个放电模块140均通过电源线和输出控制模块130耦合，以使多个放电模块140形成并联。多个放电模块140的并联能够后，能够有效的提高低频交变电场发生装置100对保鲜生物质的保鲜效果。另外，放电模块140和低频交变电场发生装置100中接地端的距离较远，以使在短距离内，其电场的衰减微弱，进而能够使得放置在该低频交变电场中位置不同的保鲜生物质均获得良好的保鲜效果。再者，由于输出控制模块130为对第二低频信号的电流强度进行调节，故放电模块140在其放电极板上所输出的电压的强度可以为500伏特至5000伏特。
请参阅图4和图5，图4和图5均示出了低频交变电场发生装置100的实际应用。图4和图5中的A为安装低频交变电场发生装置100的柜体，其可以为：冷藏保鲜库、冷藏车、食品加工厂的半成品仓库、冰箱、冷柜或商场的生鲜展示柜。图中的B为低频交变电场发生装置100的接地端。图4和图5中的C为置于柜体A中的货架C，而图4和图5中的D为置于货架C上的保鲜物品。根据实际安装使用环境的不同，图4中放电模块140的电极为一个，而图5中的放电模块140的电极为多个。本实施例中，若低频交变电场发生装置100安装在冷藏保鲜库、冷藏车或食品加工厂的半成品仓库可以实现多种食品或食品半成品的保鲜。若低频交变电场发生装置100安装在冰箱或冷柜，能使保存在冰箱与冷藏保鲜柜中的白菜、生菜、葱、蒜、香菜、草莓或樱桃等易腐烂叶菜与水果延长保鲜期到5-7天或更长的保鲜时间，且其还能够保证菜品的颜色、水分和硬度等保持良好，与新鲜蔬菜水果的差异微小。若低频交变电场发生装置100安装在商场的生鲜展示柜，其能使展示柜中的生鲜产品如：鲜肉或鱼虾等水产品鲜度保持时间延长2倍以上，同时其还能够抑制生鲜产品的微生物繁殖，并能抑制展示柜内异味产生。
以下为本实施例提供的低频交变电场发生装置100的实验数据：
草莓采用常规保存贮藏手段时，其在常温(20-25℃)下的保鲜期通常为2天。但将草莓放置于低频交变电场发生装置100产生的低频交变电场中，且草莓放置位置处的电势为50V时，草莓在下常温保鲜时间可延长5-7天。若草莓采用常规低温(0-4℃)贮藏保鲜，其保鲜期也仅为3-4天。但若在0-4℃低温环境，将草莓放置与低频交变电场中，且草莓放置处电势为50V的低频交变电场发生装置100中，草莓的保鲜时间延长至2周左右。且 草莓的好果率可保持在96％以上。
香菜采用常规保存贮藏手段时，其在10℃以下的低温保鲜期约2天。但若将香菜放置于环境温度为0-10℃的低频交变电场发生装置100产生的低频交变电场中，且香菜放置位置处的电势为50V时，香菜的保鲜时间延长至7天左右。且在低频交变电场发生装置100中，保鲜期内香菜色泽嫩绿、水分饱满、无腐烂无黄叶。
猪肉采用常规保存贮藏手段时，其在温度为0-4℃时的保鲜期仅为2-4天。但放置于温度环境为0-4℃的低频交变电场发生装置100产生的低频交变电场中，且猪肉放置位置处的电势为150V时，猪肉的保鲜期可长达12-15天，且在低频交变电场发生装置100中，保鲜期内猪肉外表清爽不发粘、无异味、色泽保持红白分明的原有色泽。
采用常规贮藏手段时，捕获后的罗非鱼需要在0℃下并且加冰保存，且保鲜期在48小时以内，否则就会腐败变质，不能食用。但若将其放置于环境温度为0-4℃的的低频交变电场发生装置100产生的低频交变电场中，且罗非鱼放置位置处的电势为200V时，其保鲜期可长达7-10天。且在低频交变电场发生装置100中，保鲜期内罗非鱼体表鲜亮，无异味，且微生物菌落总数无较大变化，保持在2.4×10 2至7.8×10 3之间的范围内。
请参阅图6，本发明实施例还提供了一种信号调节方法，应用于低频交变电场发生装置。该信号调节方法包括：步骤S110、步骤S120和步骤S130。
步骤S110：所述输入控制模块获取由所述外部交流电源输入的交变信号，并根据保鲜生物质的种类和所述交变信号生成第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组。
步骤S120：所述输出控制模块获取所述变压器的二次侧绕组输出的第二低频信号，并根据所述保鲜生物质的种类调节所述第二低频信号的电流值，以将调整后的所述第二低频信号输出至所述放电模块。
步骤S130：所述放电模块根据所接收的所述第二低频信号生成低频交变电场。
请参阅图7，在该信号调节方法中的步骤S120的子流程还包括：步骤S121和步骤S122。
步骤S121：所述整流单元将由所述外部交流电源输入的交变信号整流后，将所述交变信号输出至所述逆变单元。
步骤S122：所述逆变单元获取所述整流单元输出的交变信号，并根据保鲜生物质的种类和所述交变信号生成的所述第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组，其中，所述第一低频信号包括：正弦波、余弦波、方波、矩形波、梯形波或锯齿波。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的方法的具体工作过程，可以参考前述装置中的对应过程，在此不再赘述。
综上所述，本发明实施例提供了一种低频交变电场发生装置100、信号调节方法及低频交变电场发生系统200。低频交变电场发生装置100包括：输入控制模块110、变压器T1、输出控制模块130和放电模块140。输入控制模块110的输入端配置成与外部交流电源耦合，输入控制模块110与变压器T1的一次侧绕组aa’耦合，变压器T1的二次侧绕组bb’的一端与输出控制模块130耦合，输出控制模块130与放电模块140耦合，变压器T1的二次侧绕组bb’的另一端与地电位耦合。
通过输入控制模块110能够获取外部交流电源输入的交变信号，并根据保鲜生物质的种类和获取的交变信号生成与保鲜生物质的种类对应的第一低频信号，再将该第一低频信号输出至变压器T1的一次侧绕组aa’。变压器T1通过自身的一次侧绕组aa’和二次侧绕组bb’的电磁耦合关系，根据一次侧绕组aa’的第一低频信号，由二次侧绕组bb’输出第二低频信号。输出控制模块130能够获取变压器T1的二次侧绕组bb’输出的第二低频信号，并也根据保鲜生物质的种类调节第二低频信号的电流值，以将调整后与保鲜生物质的种类对应的第二低频信号输出至放电模块140。放电模块140通过根据所接收的第二低频信号，便能够放电产生低频交变电场。当保鲜生物质置于该低频交变电场中时，该低频交变电场能够使得保鲜生物质置内的水分子产生同频率的摆动，进而能够有效抑制保鲜生物质内部的生物化学反应及生理代谢，故能够对保鲜生物质起到良好的保鲜作用。此外，又由于该低频交变电场的特质能够对应需保鲜生物质的种类，因此，该低频交变电场能够对该保鲜生物质起到较佳的保鲜效果。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换或改进等，均应包含在本发明的保护范围之内。

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  1. 一种低频交变电场发生装置，其特征在于，所述低频交变电场发生装置包括：输入控制模块、变压器、输出控制模块和放电模块；所述输入控制模块的输入端配置成与外部交流电源耦合，所述输入控制模块与所述变压器的一次侧绕组耦合，所述变压器的二次侧绕组的一端与所述输出控制模块耦合，所述输出控制模块与所述放电模块耦合，所述变压器的二次侧绕组的另一端与地电位耦合；
    所述输入控制模块，配置成获取由所述外部交流电源输入的交变信号，并根据保鲜生物质的种类和所述交变信号生成第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组；
    所述输出控制模块，配置成获取所述变压器的二次侧绕组输出的第二低频信号，并根据所述保鲜生物质的种类调节所述第二低频信号的电流值，以将调整后的所述第二低频信号输出至所述放电模块；
    所述放电模块配置成根据所接收的所述第二低频信号生成低频交变电场。
  2. 根据权利要求1所述的低频交变电场发生装置，其特征在于，所述输入控制模块包括：整流单元和逆变单元，所述整流单元配置成与外部交流电源耦合，所述整流单元还与所述逆变单元的输入端耦合，所述逆变单元与所述变压器的一次侧绕组耦合；
    所述整流单元，配置成将由所述外部交流电源输入的交变信号整流后，将所述交变信号输出至所述逆变单元；
    所述逆变单元，配置成获取所述整流单元输出的交变信号，并根据保鲜生物质的种类和所述交变信号生成的所述第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组，其中，所述第一低频信号包括：正弦波、余弦波、方波、矩形波、梯形波或锯齿波。
  3. 根据权利要求1所述的低频交变电场发生装置，其特征在于，所述低频交变电场发生装置还包括：保护模块，所述保护模块分别与所述变压器的二次侧绕组的另一端和所述地电位耦合。
  4. 根据权利要求1所述的低频交变电场发生装置，其特征在于，所述低频交变电场在所述放电模块电极上的电压强度为500伏特至5000伏特。
  5. 根据权利要求4所述的低频交变电场发生装置，其特征在于，所述放电模块由导电材料制成，所述放电模块的形状为：板状、条状、柱状或网状。
  6. 根据权利要求4所述的低频交变电场发生装置，其特征在于，所述放电模块的外表面覆盖有绝缘材料。
  7. 根据权利要求1所述的低频交变电场发生装置，其特征在于，所述第二低频信号的电流强度为0.0001安培至0.15安培。
  8. 一种信号调节方法，其特征在于，应用于权利要求1-7任一项所述的低频交变电场发生装置，所述低频交变电场发生装置包括：输入控制模块、变压器、输出控制模块和放电模块；所述输入控制模块的输入端配置成与外部交流电源耦合，所述输入控制模块与所述变压器的一次侧绕组耦合，所述变压器的二次侧绕组的一端与所述输出控制模块耦合，所述输出控制模块与所述放电模块耦合，所述变压器的二次侧绕组的另一端与地电位耦合；所述方法包括：
    所述输入控制模块获取由所述外部交流电源输入的交变信号，并根据保鲜生物质的种类和所述交变信号生成第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组；
    所述输出控制模块获取所述变压器的二次侧绕组输出的第二低频信号，并根据所述保鲜生物质的种类调节所述第二低频信号的电流值，以将调整后的所述第二低频信号输出至所述放电模块；以及
    所述放电模块根据所接收的所述第二低频信号生成低频交变电场。
  9. 根据权利要求8所述的信号调节方法，其特征在于，所述输入控制模块包括：整流单元和逆变单元，所述整流单元配置成与外部交流电源耦合，所述整流单元还与所述逆变单元的输入端耦合，所述逆变单元与所述变压器的一次侧绕组耦合；所述方法还包括：
    所述整流单元将由所述外部交流电源输入的交变信号整流后，将所述交变信号输出至所述逆变单元；以及
    所述逆变单元获取所述整流单元输出的交变信号，并根据保鲜生物质的种类和所述交变信号生成的所述第一低频信号，将所述第一低频信号输出至所述变压器的一次侧绕组，其中，所述第一低频信号包括：正弦波、余弦波、方波、矩形波、梯形波或锯齿波。
  10. 一种低频交变电场发生系统，其特征在于，所述低频交变电场发生系统包括：控制器和权利要求1-7任意一项所述的低频交变电场发生装置，所述控制器与所述低频交变电场发生装置耦合。
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